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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 | * | |
e5cabeb3 AB |
8 | * Copyright 2009 Integrated Device Technology, Inc. |
9 | * Alex Bounine <alexandre.bounine@idt.com> | |
10 | * - Added Port-Write/Error Management initialization and handling | |
11 | * | |
394b701c MP |
12 | * This program is free software; you can redistribute it and/or modify it |
13 | * under the terms of the GNU General Public License as published by the | |
14 | * Free Software Foundation; either version 2 of the License, or (at your | |
15 | * option) any later version. | |
16 | */ | |
17 | ||
394b701c MP |
18 | #include <linux/types.h> |
19 | #include <linux/kernel.h> | |
20 | ||
21 | #include <linux/delay.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/rio.h> | |
24 | #include <linux/rio_drv.h> | |
25 | #include <linux/rio_ids.h> | |
26 | #include <linux/rio_regs.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/spinlock.h> | |
de25968c | 29 | #include <linux/slab.h> |
5febf1cd | 30 | #include <linux/interrupt.h> |
394b701c MP |
31 | |
32 | #include "rio.h" | |
33 | ||
a11650e1 AB |
34 | static LIST_HEAD(rio_devices); |
35 | static DEFINE_SPINLOCK(rio_global_list_lock); | |
36 | ||
394b701c | 37 | static LIST_HEAD(rio_mports); |
a11650e1 | 38 | static DEFINE_MUTEX(rio_mport_list_lock); |
569fccb6 | 39 | static unsigned char next_portid; |
da1589f0 | 40 | static DEFINE_SPINLOCK(rio_mmap_lock); |
394b701c MP |
41 | |
42 | /** | |
43 | * rio_local_get_device_id - Get the base/extended device id for a port | |
44 | * @port: RIO master port from which to get the deviceid | |
45 | * | |
46 | * Reads the base/extended device id from the local device | |
47 | * implementing the master port. Returns the 8/16-bit device | |
48 | * id. | |
49 | */ | |
50 | u16 rio_local_get_device_id(struct rio_mport *port) | |
51 | { | |
52 | u32 result; | |
53 | ||
54 | rio_local_read_config_32(port, RIO_DID_CSR, &result); | |
55 | ||
e0423236 | 56 | return (RIO_GET_DID(port->sys_size, result)); |
394b701c MP |
57 | } |
58 | ||
a11650e1 AB |
59 | /** |
60 | * rio_add_device- Adds a RIO device to the device model | |
61 | * @rdev: RIO device | |
62 | * | |
63 | * Adds the RIO device to the global device list and adds the RIO | |
64 | * device to the RIO device list. Creates the generic sysfs nodes | |
65 | * for an RIO device. | |
66 | */ | |
67 | int rio_add_device(struct rio_dev *rdev) | |
68 | { | |
69 | int err; | |
70 | ||
71 | err = device_add(&rdev->dev); | |
72 | if (err) | |
73 | return err; | |
74 | ||
75 | spin_lock(&rio_global_list_lock); | |
76 | list_add_tail(&rdev->global_list, &rio_devices); | |
77 | spin_unlock(&rio_global_list_lock); | |
78 | ||
79 | rio_create_sysfs_dev_files(rdev); | |
80 | ||
81 | return 0; | |
82 | } | |
83 | EXPORT_SYMBOL_GPL(rio_add_device); | |
84 | ||
394b701c MP |
85 | /** |
86 | * rio_request_inb_mbox - request inbound mailbox service | |
87 | * @mport: RIO master port from which to allocate the mailbox resource | |
6978bbc0 | 88 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
89 | * @mbox: Mailbox number to claim |
90 | * @entries: Number of entries in inbound mailbox queue | |
91 | * @minb: Callback to execute when inbound message is received | |
92 | * | |
93 | * Requests ownership of an inbound mailbox resource and binds | |
94 | * a callback function to the resource. Returns %0 on success. | |
95 | */ | |
96 | int rio_request_inb_mbox(struct rio_mport *mport, | |
6978bbc0 | 97 | void *dev_id, |
394b701c MP |
98 | int mbox, |
99 | int entries, | |
6978bbc0 | 100 | void (*minb) (struct rio_mport * mport, void *dev_id, int mbox, |
394b701c MP |
101 | int slot)) |
102 | { | |
f8f06269 AB |
103 | int rc = -ENOSYS; |
104 | struct resource *res; | |
394b701c | 105 | |
f8f06269 AB |
106 | if (mport->ops->open_inb_mbox == NULL) |
107 | goto out; | |
108 | ||
109 | res = kmalloc(sizeof(struct resource), GFP_KERNEL); | |
394b701c MP |
110 | |
111 | if (res) { | |
112 | rio_init_mbox_res(res, mbox, mbox); | |
113 | ||
114 | /* Make sure this mailbox isn't in use */ | |
115 | if ((rc = | |
116 | request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE], | |
117 | res)) < 0) { | |
118 | kfree(res); | |
119 | goto out; | |
120 | } | |
121 | ||
122 | mport->inb_msg[mbox].res = res; | |
123 | ||
124 | /* Hook the inbound message callback */ | |
125 | mport->inb_msg[mbox].mcback = minb; | |
126 | ||
f8f06269 | 127 | rc = mport->ops->open_inb_mbox(mport, dev_id, mbox, entries); |
394b701c MP |
128 | } else |
129 | rc = -ENOMEM; | |
130 | ||
131 | out: | |
132 | return rc; | |
133 | } | |
134 | ||
135 | /** | |
136 | * rio_release_inb_mbox - release inbound mailbox message service | |
137 | * @mport: RIO master port from which to release the mailbox resource | |
138 | * @mbox: Mailbox number to release | |
139 | * | |
140 | * Releases ownership of an inbound mailbox resource. Returns 0 | |
141 | * if the request has been satisfied. | |
142 | */ | |
143 | int rio_release_inb_mbox(struct rio_mport *mport, int mbox) | |
144 | { | |
f8f06269 AB |
145 | if (mport->ops->close_inb_mbox) { |
146 | mport->ops->close_inb_mbox(mport, mbox); | |
394b701c | 147 | |
f8f06269 AB |
148 | /* Release the mailbox resource */ |
149 | return release_resource(mport->inb_msg[mbox].res); | |
150 | } else | |
151 | return -ENOSYS; | |
394b701c MP |
152 | } |
153 | ||
154 | /** | |
155 | * rio_request_outb_mbox - request outbound mailbox service | |
156 | * @mport: RIO master port from which to allocate the mailbox resource | |
6978bbc0 | 157 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
158 | * @mbox: Mailbox number to claim |
159 | * @entries: Number of entries in outbound mailbox queue | |
160 | * @moutb: Callback to execute when outbound message is sent | |
161 | * | |
162 | * Requests ownership of an outbound mailbox resource and binds | |
163 | * a callback function to the resource. Returns 0 on success. | |
164 | */ | |
165 | int rio_request_outb_mbox(struct rio_mport *mport, | |
6978bbc0 | 166 | void *dev_id, |
394b701c MP |
167 | int mbox, |
168 | int entries, | |
6978bbc0 | 169 | void (*moutb) (struct rio_mport * mport, void *dev_id, int mbox, int slot)) |
394b701c | 170 | { |
f8f06269 AB |
171 | int rc = -ENOSYS; |
172 | struct resource *res; | |
394b701c | 173 | |
f8f06269 AB |
174 | if (mport->ops->open_outb_mbox == NULL) |
175 | goto out; | |
176 | ||
177 | res = kmalloc(sizeof(struct resource), GFP_KERNEL); | |
394b701c MP |
178 | |
179 | if (res) { | |
180 | rio_init_mbox_res(res, mbox, mbox); | |
181 | ||
182 | /* Make sure this outbound mailbox isn't in use */ | |
183 | if ((rc = | |
184 | request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE], | |
185 | res)) < 0) { | |
186 | kfree(res); | |
187 | goto out; | |
188 | } | |
189 | ||
190 | mport->outb_msg[mbox].res = res; | |
191 | ||
192 | /* Hook the inbound message callback */ | |
193 | mport->outb_msg[mbox].mcback = moutb; | |
194 | ||
f8f06269 | 195 | rc = mport->ops->open_outb_mbox(mport, dev_id, mbox, entries); |
394b701c MP |
196 | } else |
197 | rc = -ENOMEM; | |
198 | ||
199 | out: | |
200 | return rc; | |
201 | } | |
202 | ||
203 | /** | |
204 | * rio_release_outb_mbox - release outbound mailbox message service | |
205 | * @mport: RIO master port from which to release the mailbox resource | |
206 | * @mbox: Mailbox number to release | |
207 | * | |
208 | * Releases ownership of an inbound mailbox resource. Returns 0 | |
209 | * if the request has been satisfied. | |
210 | */ | |
211 | int rio_release_outb_mbox(struct rio_mport *mport, int mbox) | |
212 | { | |
f8f06269 AB |
213 | if (mport->ops->close_outb_mbox) { |
214 | mport->ops->close_outb_mbox(mport, mbox); | |
394b701c | 215 | |
f8f06269 AB |
216 | /* Release the mailbox resource */ |
217 | return release_resource(mport->outb_msg[mbox].res); | |
218 | } else | |
219 | return -ENOSYS; | |
394b701c MP |
220 | } |
221 | ||
222 | /** | |
223 | * rio_setup_inb_dbell - bind inbound doorbell callback | |
224 | * @mport: RIO master port to bind the doorbell callback | |
6978bbc0 | 225 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
226 | * @res: Doorbell message resource |
227 | * @dinb: Callback to execute when doorbell is received | |
228 | * | |
229 | * Adds a doorbell resource/callback pair into a port's | |
230 | * doorbell event list. Returns 0 if the request has been | |
231 | * satisfied. | |
232 | */ | |
233 | static int | |
6978bbc0 MP |
234 | rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res, |
235 | void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst, | |
394b701c MP |
236 | u16 info)) |
237 | { | |
238 | int rc = 0; | |
239 | struct rio_dbell *dbell; | |
240 | ||
241 | if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) { | |
242 | rc = -ENOMEM; | |
243 | goto out; | |
244 | } | |
245 | ||
246 | dbell->res = res; | |
247 | dbell->dinb = dinb; | |
6978bbc0 | 248 | dbell->dev_id = dev_id; |
394b701c MP |
249 | |
250 | list_add_tail(&dbell->node, &mport->dbells); | |
251 | ||
252 | out: | |
253 | return rc; | |
254 | } | |
255 | ||
256 | /** | |
257 | * rio_request_inb_dbell - request inbound doorbell message service | |
258 | * @mport: RIO master port from which to allocate the doorbell resource | |
6978bbc0 | 259 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
260 | * @start: Doorbell info range start |
261 | * @end: Doorbell info range end | |
262 | * @dinb: Callback to execute when doorbell is received | |
263 | * | |
264 | * Requests ownership of an inbound doorbell resource and binds | |
265 | * a callback function to the resource. Returns 0 if the request | |
266 | * has been satisfied. | |
267 | */ | |
268 | int rio_request_inb_dbell(struct rio_mport *mport, | |
6978bbc0 | 269 | void *dev_id, |
394b701c MP |
270 | u16 start, |
271 | u16 end, | |
6978bbc0 | 272 | void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, |
394b701c MP |
273 | u16 dst, u16 info)) |
274 | { | |
275 | int rc = 0; | |
276 | ||
277 | struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); | |
278 | ||
279 | if (res) { | |
280 | rio_init_dbell_res(res, start, end); | |
281 | ||
282 | /* Make sure these doorbells aren't in use */ | |
283 | if ((rc = | |
284 | request_resource(&mport->riores[RIO_DOORBELL_RESOURCE], | |
285 | res)) < 0) { | |
286 | kfree(res); | |
287 | goto out; | |
288 | } | |
289 | ||
290 | /* Hook the doorbell callback */ | |
6978bbc0 | 291 | rc = rio_setup_inb_dbell(mport, dev_id, res, dinb); |
394b701c MP |
292 | } else |
293 | rc = -ENOMEM; | |
294 | ||
295 | out: | |
296 | return rc; | |
297 | } | |
298 | ||
299 | /** | |
300 | * rio_release_inb_dbell - release inbound doorbell message service | |
301 | * @mport: RIO master port from which to release the doorbell resource | |
302 | * @start: Doorbell info range start | |
303 | * @end: Doorbell info range end | |
304 | * | |
305 | * Releases ownership of an inbound doorbell resource and removes | |
306 | * callback from the doorbell event list. Returns 0 if the request | |
307 | * has been satisfied. | |
308 | */ | |
309 | int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end) | |
310 | { | |
311 | int rc = 0, found = 0; | |
312 | struct rio_dbell *dbell; | |
313 | ||
314 | list_for_each_entry(dbell, &mport->dbells, node) { | |
315 | if ((dbell->res->start == start) && (dbell->res->end == end)) { | |
316 | found = 1; | |
317 | break; | |
318 | } | |
319 | } | |
320 | ||
321 | /* If we can't find an exact match, fail */ | |
322 | if (!found) { | |
323 | rc = -EINVAL; | |
324 | goto out; | |
325 | } | |
326 | ||
327 | /* Delete from list */ | |
328 | list_del(&dbell->node); | |
329 | ||
330 | /* Release the doorbell resource */ | |
331 | rc = release_resource(dbell->res); | |
332 | ||
333 | /* Free the doorbell event */ | |
334 | kfree(dbell); | |
335 | ||
336 | out: | |
337 | return rc; | |
338 | } | |
339 | ||
340 | /** | |
341 | * rio_request_outb_dbell - request outbound doorbell message range | |
342 | * @rdev: RIO device from which to allocate the doorbell resource | |
343 | * @start: Doorbell message range start | |
344 | * @end: Doorbell message range end | |
345 | * | |
346 | * Requests ownership of a doorbell message range. Returns a resource | |
347 | * if the request has been satisfied or %NULL on failure. | |
348 | */ | |
349 | struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start, | |
350 | u16 end) | |
351 | { | |
352 | struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); | |
353 | ||
354 | if (res) { | |
355 | rio_init_dbell_res(res, start, end); | |
356 | ||
357 | /* Make sure these doorbells aren't in use */ | |
358 | if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res) | |
359 | < 0) { | |
360 | kfree(res); | |
361 | res = NULL; | |
362 | } | |
363 | } | |
364 | ||
365 | return res; | |
366 | } | |
367 | ||
368 | /** | |
369 | * rio_release_outb_dbell - release outbound doorbell message range | |
370 | * @rdev: RIO device from which to release the doorbell resource | |
371 | * @res: Doorbell resource to be freed | |
372 | * | |
373 | * Releases ownership of a doorbell message range. Returns 0 if the | |
374 | * request has been satisfied. | |
375 | */ | |
376 | int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res) | |
377 | { | |
378 | int rc = release_resource(res); | |
379 | ||
380 | kfree(res); | |
381 | ||
382 | return rc; | |
383 | } | |
384 | ||
e5cabeb3 AB |
385 | /** |
386 | * rio_request_inb_pwrite - request inbound port-write message service | |
97ef6f74 | 387 | * @rdev: RIO device to which register inbound port-write callback routine |
e5cabeb3 AB |
388 | * @pwcback: Callback routine to execute when port-write is received |
389 | * | |
390 | * Binds a port-write callback function to the RapidIO device. | |
391 | * Returns 0 if the request has been satisfied. | |
392 | */ | |
393 | int rio_request_inb_pwrite(struct rio_dev *rdev, | |
394 | int (*pwcback)(struct rio_dev *rdev, union rio_pw_msg *msg, int step)) | |
395 | { | |
396 | int rc = 0; | |
397 | ||
398 | spin_lock(&rio_global_list_lock); | |
399 | if (rdev->pwcback != NULL) | |
400 | rc = -ENOMEM; | |
401 | else | |
402 | rdev->pwcback = pwcback; | |
403 | ||
404 | spin_unlock(&rio_global_list_lock); | |
405 | return rc; | |
406 | } | |
407 | EXPORT_SYMBOL_GPL(rio_request_inb_pwrite); | |
408 | ||
409 | /** | |
410 | * rio_release_inb_pwrite - release inbound port-write message service | |
411 | * @rdev: RIO device which registered for inbound port-write callback | |
412 | * | |
413 | * Removes callback from the rio_dev structure. Returns 0 if the request | |
414 | * has been satisfied. | |
415 | */ | |
416 | int rio_release_inb_pwrite(struct rio_dev *rdev) | |
417 | { | |
418 | int rc = -ENOMEM; | |
419 | ||
420 | spin_lock(&rio_global_list_lock); | |
421 | if (rdev->pwcback) { | |
422 | rdev->pwcback = NULL; | |
423 | rc = 0; | |
424 | } | |
425 | ||
426 | spin_unlock(&rio_global_list_lock); | |
427 | return rc; | |
428 | } | |
429 | EXPORT_SYMBOL_GPL(rio_release_inb_pwrite); | |
430 | ||
da1589f0 AB |
431 | /** |
432 | * rio_map_inb_region -- Map inbound memory region. | |
433 | * @mport: Master port. | |
2ca3cb50 | 434 | * @local: physical address of memory region to be mapped |
da1589f0 AB |
435 | * @rbase: RIO base address assigned to this window |
436 | * @size: Size of the memory region | |
437 | * @rflags: Flags for mapping. | |
438 | * | |
439 | * Return: 0 -- Success. | |
440 | * | |
441 | * This function will create the mapping from RIO space to local memory. | |
442 | */ | |
443 | int rio_map_inb_region(struct rio_mport *mport, dma_addr_t local, | |
444 | u64 rbase, u32 size, u32 rflags) | |
445 | { | |
446 | int rc = 0; | |
447 | unsigned long flags; | |
448 | ||
449 | if (!mport->ops->map_inb) | |
450 | return -1; | |
451 | spin_lock_irqsave(&rio_mmap_lock, flags); | |
452 | rc = mport->ops->map_inb(mport, local, rbase, size, rflags); | |
453 | spin_unlock_irqrestore(&rio_mmap_lock, flags); | |
454 | return rc; | |
455 | } | |
456 | EXPORT_SYMBOL_GPL(rio_map_inb_region); | |
457 | ||
458 | /** | |
459 | * rio_unmap_inb_region -- Unmap the inbound memory region | |
460 | * @mport: Master port | |
461 | * @lstart: physical address of memory region to be unmapped | |
462 | */ | |
463 | void rio_unmap_inb_region(struct rio_mport *mport, dma_addr_t lstart) | |
464 | { | |
465 | unsigned long flags; | |
466 | if (!mport->ops->unmap_inb) | |
467 | return; | |
468 | spin_lock_irqsave(&rio_mmap_lock, flags); | |
469 | mport->ops->unmap_inb(mport, lstart); | |
470 | spin_unlock_irqrestore(&rio_mmap_lock, flags); | |
471 | } | |
472 | EXPORT_SYMBOL_GPL(rio_unmap_inb_region); | |
473 | ||
e5cabeb3 AB |
474 | /** |
475 | * rio_mport_get_physefb - Helper function that returns register offset | |
476 | * for Physical Layer Extended Features Block. | |
97ef6f74 RD |
477 | * @port: Master port to issue transaction |
478 | * @local: Indicate a local master port or remote device access | |
479 | * @destid: Destination ID of the device | |
480 | * @hopcount: Number of switch hops to the device | |
e5cabeb3 AB |
481 | */ |
482 | u32 | |
483 | rio_mport_get_physefb(struct rio_mport *port, int local, | |
484 | u16 destid, u8 hopcount) | |
485 | { | |
486 | u32 ext_ftr_ptr; | |
487 | u32 ftr_header; | |
488 | ||
489 | ext_ftr_ptr = rio_mport_get_efb(port, local, destid, hopcount, 0); | |
490 | ||
491 | while (ext_ftr_ptr) { | |
492 | if (local) | |
493 | rio_local_read_config_32(port, ext_ftr_ptr, | |
494 | &ftr_header); | |
495 | else | |
496 | rio_mport_read_config_32(port, destid, hopcount, | |
497 | ext_ftr_ptr, &ftr_header); | |
498 | ||
499 | ftr_header = RIO_GET_BLOCK_ID(ftr_header); | |
500 | switch (ftr_header) { | |
501 | ||
502 | case RIO_EFB_SER_EP_ID_V13P: | |
503 | case RIO_EFB_SER_EP_REC_ID_V13P: | |
504 | case RIO_EFB_SER_EP_FREE_ID_V13P: | |
505 | case RIO_EFB_SER_EP_ID: | |
506 | case RIO_EFB_SER_EP_REC_ID: | |
507 | case RIO_EFB_SER_EP_FREE_ID: | |
508 | case RIO_EFB_SER_EP_FREC_ID: | |
509 | ||
510 | return ext_ftr_ptr; | |
511 | ||
512 | default: | |
513 | break; | |
514 | } | |
515 | ||
516 | ext_ftr_ptr = rio_mport_get_efb(port, local, destid, | |
517 | hopcount, ext_ftr_ptr); | |
518 | } | |
519 | ||
520 | return ext_ftr_ptr; | |
521 | } | |
a11650e1 | 522 | EXPORT_SYMBOL_GPL(rio_mport_get_physefb); |
e5cabeb3 AB |
523 | |
524 | /** | |
525 | * rio_get_comptag - Begin or continue searching for a RIO device by component tag | |
97ef6f74 | 526 | * @comp_tag: RIO component tag to match |
e5cabeb3 AB |
527 | * @from: Previous RIO device found in search, or %NULL for new search |
528 | * | |
529 | * Iterates through the list of known RIO devices. If a RIO device is | |
530 | * found with a matching @comp_tag, a pointer to its device | |
531 | * structure is returned. Otherwise, %NULL is returned. A new search | |
532 | * is initiated by passing %NULL to the @from argument. Otherwise, if | |
533 | * @from is not %NULL, searches continue from next device on the global | |
534 | * list. | |
535 | */ | |
af84ca38 | 536 | struct rio_dev *rio_get_comptag(u32 comp_tag, struct rio_dev *from) |
e5cabeb3 AB |
537 | { |
538 | struct list_head *n; | |
539 | struct rio_dev *rdev; | |
540 | ||
e5cabeb3 AB |
541 | spin_lock(&rio_global_list_lock); |
542 | n = from ? from->global_list.next : rio_devices.next; | |
543 | ||
544 | while (n && (n != &rio_devices)) { | |
545 | rdev = rio_dev_g(n); | |
546 | if (rdev->comp_tag == comp_tag) | |
547 | goto exit; | |
548 | n = n->next; | |
549 | } | |
550 | rdev = NULL; | |
551 | exit: | |
552 | spin_unlock(&rio_global_list_lock); | |
553 | return rdev; | |
554 | } | |
a11650e1 | 555 | EXPORT_SYMBOL_GPL(rio_get_comptag); |
e5cabeb3 AB |
556 | |
557 | /** | |
558 | * rio_set_port_lockout - Sets/clears LOCKOUT bit (RIO EM 1.3) for a switch port. | |
559 | * @rdev: Pointer to RIO device control structure | |
560 | * @pnum: Switch port number to set LOCKOUT bit | |
561 | * @lock: Operation : set (=1) or clear (=0) | |
562 | */ | |
563 | int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock) | |
564 | { | |
e5cabeb3 AB |
565 | u32 regval; |
566 | ||
a93192a5 | 567 | rio_read_config_32(rdev, |
e5cabeb3 AB |
568 | rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum), |
569 | ®val); | |
570 | if (lock) | |
571 | regval |= RIO_PORT_N_CTL_LOCKOUT; | |
572 | else | |
573 | regval &= ~RIO_PORT_N_CTL_LOCKOUT; | |
574 | ||
a93192a5 | 575 | rio_write_config_32(rdev, |
e5cabeb3 AB |
576 | rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum), |
577 | regval); | |
578 | return 0; | |
579 | } | |
a11650e1 AB |
580 | EXPORT_SYMBOL_GPL(rio_set_port_lockout); |
581 | ||
582 | /** | |
583 | * rio_switch_init - Sets switch operations for a particular vendor switch | |
584 | * @rdev: RIO device | |
585 | * @do_enum: Enumeration/Discovery mode flag | |
586 | * | |
587 | * Searches the RIO switch ops table for known switch types. If the vid | |
588 | * and did match a switch table entry, then call switch initialization | |
589 | * routine to setup switch-specific routines. | |
590 | */ | |
591 | void rio_switch_init(struct rio_dev *rdev, int do_enum) | |
592 | { | |
593 | struct rio_switch_ops *cur = __start_rio_switch_ops; | |
594 | struct rio_switch_ops *end = __end_rio_switch_ops; | |
595 | ||
596 | while (cur < end) { | |
597 | if ((cur->vid == rdev->vid) && (cur->did == rdev->did)) { | |
598 | pr_debug("RIO: calling init routine for %s\n", | |
599 | rio_name(rdev)); | |
600 | cur->init_hook(rdev, do_enum); | |
601 | break; | |
602 | } | |
603 | cur++; | |
604 | } | |
605 | ||
606 | if ((cur >= end) && (rdev->pef & RIO_PEF_STD_RT)) { | |
607 | pr_debug("RIO: adding STD routing ops for %s\n", | |
608 | rio_name(rdev)); | |
609 | rdev->rswitch->add_entry = rio_std_route_add_entry; | |
610 | rdev->rswitch->get_entry = rio_std_route_get_entry; | |
611 | rdev->rswitch->clr_table = rio_std_route_clr_table; | |
612 | } | |
613 | ||
614 | if (!rdev->rswitch->add_entry || !rdev->rswitch->get_entry) | |
615 | printk(KERN_ERR "RIO: missing routing ops for %s\n", | |
616 | rio_name(rdev)); | |
617 | } | |
618 | EXPORT_SYMBOL_GPL(rio_switch_init); | |
619 | ||
620 | /** | |
621 | * rio_enable_rx_tx_port - enable input receiver and output transmitter of | |
622 | * given port | |
623 | * @port: Master port associated with the RIO network | |
624 | * @local: local=1 select local port otherwise a far device is reached | |
625 | * @destid: Destination ID of the device to check host bit | |
626 | * @hopcount: Number of hops to reach the target | |
627 | * @port_num: Port (-number on switch) to enable on a far end device | |
628 | * | |
629 | * Returns 0 or 1 from on General Control Command and Status Register | |
630 | * (EXT_PTR+0x3C) | |
631 | */ | |
632 | int rio_enable_rx_tx_port(struct rio_mport *port, | |
633 | int local, u16 destid, | |
634 | u8 hopcount, u8 port_num) | |
635 | { | |
636 | #ifdef CONFIG_RAPIDIO_ENABLE_RX_TX_PORTS | |
637 | u32 regval; | |
638 | u32 ext_ftr_ptr; | |
639 | ||
640 | /* | |
641 | * enable rx input tx output port | |
642 | */ | |
643 | pr_debug("rio_enable_rx_tx_port(local = %d, destid = %d, hopcount = " | |
644 | "%d, port_num = %d)\n", local, destid, hopcount, port_num); | |
645 | ||
646 | ext_ftr_ptr = rio_mport_get_physefb(port, local, destid, hopcount); | |
647 | ||
648 | if (local) { | |
649 | rio_local_read_config_32(port, ext_ftr_ptr + | |
650 | RIO_PORT_N_CTL_CSR(0), | |
651 | ®val); | |
652 | } else { | |
653 | if (rio_mport_read_config_32(port, destid, hopcount, | |
654 | ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), ®val) < 0) | |
655 | return -EIO; | |
656 | } | |
657 | ||
658 | if (regval & RIO_PORT_N_CTL_P_TYP_SER) { | |
659 | /* serial */ | |
660 | regval = regval | RIO_PORT_N_CTL_EN_RX_SER | |
661 | | RIO_PORT_N_CTL_EN_TX_SER; | |
662 | } else { | |
663 | /* parallel */ | |
664 | regval = regval | RIO_PORT_N_CTL_EN_RX_PAR | |
665 | | RIO_PORT_N_CTL_EN_TX_PAR; | |
666 | } | |
667 | ||
668 | if (local) { | |
669 | rio_local_write_config_32(port, ext_ftr_ptr + | |
670 | RIO_PORT_N_CTL_CSR(0), regval); | |
671 | } else { | |
672 | if (rio_mport_write_config_32(port, destid, hopcount, | |
673 | ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), regval) < 0) | |
674 | return -EIO; | |
675 | } | |
676 | #endif | |
677 | return 0; | |
678 | } | |
679 | EXPORT_SYMBOL_GPL(rio_enable_rx_tx_port); | |
680 | ||
e5cabeb3 | 681 | |
6429cd49 AB |
682 | /** |
683 | * rio_chk_dev_route - Validate route to the specified device. | |
684 | * @rdev: RIO device failed to respond | |
685 | * @nrdev: Last active device on the route to rdev | |
686 | * @npnum: nrdev's port number on the route to rdev | |
687 | * | |
688 | * Follows a route to the specified RIO device to determine the last available | |
689 | * device (and corresponding RIO port) on the route. | |
690 | */ | |
691 | static int | |
692 | rio_chk_dev_route(struct rio_dev *rdev, struct rio_dev **nrdev, int *npnum) | |
693 | { | |
694 | u32 result; | |
a93192a5 | 695 | int p_port, rc = -EIO; |
6429cd49 AB |
696 | struct rio_dev *prev = NULL; |
697 | ||
698 | /* Find switch with failed RIO link */ | |
699 | while (rdev->prev && (rdev->prev->pef & RIO_PEF_SWITCH)) { | |
700 | if (!rio_read_config_32(rdev->prev, RIO_DEV_ID_CAR, &result)) { | |
701 | prev = rdev->prev; | |
702 | break; | |
703 | } | |
704 | rdev = rdev->prev; | |
705 | } | |
706 | ||
707 | if (prev == NULL) | |
708 | goto err_out; | |
709 | ||
a93192a5 | 710 | p_port = prev->rswitch->route_table[rdev->destid]; |
6429cd49 | 711 | |
af84ca38 | 712 | if (p_port != RIO_INVALID_ROUTE) { |
6429cd49 AB |
713 | pr_debug("RIO: link failed on [%s]-P%d\n", |
714 | rio_name(prev), p_port); | |
715 | *nrdev = prev; | |
716 | *npnum = p_port; | |
717 | rc = 0; | |
718 | } else | |
af84ca38 | 719 | pr_debug("RIO: failed to trace route to %s\n", rio_name(rdev)); |
6429cd49 AB |
720 | err_out: |
721 | return rc; | |
722 | } | |
723 | ||
724 | /** | |
725 | * rio_mport_chk_dev_access - Validate access to the specified device. | |
726 | * @mport: Master port to send transactions | |
727 | * @destid: Device destination ID in network | |
728 | * @hopcount: Number of hops into the network | |
729 | */ | |
e274e0ed | 730 | int |
6429cd49 AB |
731 | rio_mport_chk_dev_access(struct rio_mport *mport, u16 destid, u8 hopcount) |
732 | { | |
733 | int i = 0; | |
734 | u32 tmp; | |
735 | ||
736 | while (rio_mport_read_config_32(mport, destid, hopcount, | |
737 | RIO_DEV_ID_CAR, &tmp)) { | |
738 | i++; | |
739 | if (i == RIO_MAX_CHK_RETRY) | |
740 | return -EIO; | |
741 | mdelay(1); | |
742 | } | |
743 | ||
744 | return 0; | |
745 | } | |
a11650e1 | 746 | EXPORT_SYMBOL_GPL(rio_mport_chk_dev_access); |
6429cd49 AB |
747 | |
748 | /** | |
749 | * rio_chk_dev_access - Validate access to the specified device. | |
750 | * @rdev: Pointer to RIO device control structure | |
751 | */ | |
752 | static int rio_chk_dev_access(struct rio_dev *rdev) | |
753 | { | |
a93192a5 AB |
754 | return rio_mport_chk_dev_access(rdev->net->hport, |
755 | rdev->destid, rdev->hopcount); | |
6429cd49 AB |
756 | } |
757 | ||
dd5648c9 AB |
758 | /** |
759 | * rio_get_input_status - Sends a Link-Request/Input-Status control symbol and | |
760 | * returns link-response (if requested). | |
761 | * @rdev: RIO devive to issue Input-status command | |
762 | * @pnum: Device port number to issue the command | |
763 | * @lnkresp: Response from a link partner | |
764 | */ | |
765 | static int | |
766 | rio_get_input_status(struct rio_dev *rdev, int pnum, u32 *lnkresp) | |
767 | { | |
dd5648c9 AB |
768 | u32 regval; |
769 | int checkcount; | |
770 | ||
771 | if (lnkresp) { | |
772 | /* Read from link maintenance response register | |
773 | * to clear valid bit */ | |
a93192a5 | 774 | rio_read_config_32(rdev, |
dd5648c9 AB |
775 | rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum), |
776 | ®val); | |
777 | udelay(50); | |
778 | } | |
779 | ||
780 | /* Issue Input-status command */ | |
a93192a5 | 781 | rio_write_config_32(rdev, |
dd5648c9 AB |
782 | rdev->phys_efptr + RIO_PORT_N_MNT_REQ_CSR(pnum), |
783 | RIO_MNT_REQ_CMD_IS); | |
784 | ||
785 | /* Exit if the response is not expected */ | |
786 | if (lnkresp == NULL) | |
787 | return 0; | |
788 | ||
789 | checkcount = 3; | |
790 | while (checkcount--) { | |
791 | udelay(50); | |
a93192a5 | 792 | rio_read_config_32(rdev, |
dd5648c9 AB |
793 | rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum), |
794 | ®val); | |
795 | if (regval & RIO_PORT_N_MNT_RSP_RVAL) { | |
796 | *lnkresp = regval; | |
797 | return 0; | |
798 | } | |
799 | } | |
800 | ||
801 | return -EIO; | |
802 | } | |
803 | ||
804 | /** | |
805 | * rio_clr_err_stopped - Clears port Error-stopped states. | |
806 | * @rdev: Pointer to RIO device control structure | |
807 | * @pnum: Switch port number to clear errors | |
808 | * @err_status: port error status (if 0 reads register from device) | |
809 | */ | |
810 | static int rio_clr_err_stopped(struct rio_dev *rdev, u32 pnum, u32 err_status) | |
811 | { | |
dd5648c9 AB |
812 | struct rio_dev *nextdev = rdev->rswitch->nextdev[pnum]; |
813 | u32 regval; | |
814 | u32 far_ackid, far_linkstat, near_ackid; | |
815 | ||
816 | if (err_status == 0) | |
a93192a5 | 817 | rio_read_config_32(rdev, |
dd5648c9 AB |
818 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), |
819 | &err_status); | |
820 | ||
821 | if (err_status & RIO_PORT_N_ERR_STS_PW_OUT_ES) { | |
822 | pr_debug("RIO_EM: servicing Output Error-Stopped state\n"); | |
823 | /* | |
824 | * Send a Link-Request/Input-Status control symbol | |
825 | */ | |
826 | if (rio_get_input_status(rdev, pnum, ®val)) { | |
827 | pr_debug("RIO_EM: Input-status response timeout\n"); | |
828 | goto rd_err; | |
829 | } | |
830 | ||
831 | pr_debug("RIO_EM: SP%d Input-status response=0x%08x\n", | |
832 | pnum, regval); | |
833 | far_ackid = (regval & RIO_PORT_N_MNT_RSP_ASTAT) >> 5; | |
834 | far_linkstat = regval & RIO_PORT_N_MNT_RSP_LSTAT; | |
a93192a5 | 835 | rio_read_config_32(rdev, |
dd5648c9 AB |
836 | rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum), |
837 | ®val); | |
838 | pr_debug("RIO_EM: SP%d_ACK_STS_CSR=0x%08x\n", pnum, regval); | |
839 | near_ackid = (regval & RIO_PORT_N_ACK_INBOUND) >> 24; | |
840 | pr_debug("RIO_EM: SP%d far_ackID=0x%02x far_linkstat=0x%02x" \ | |
841 | " near_ackID=0x%02x\n", | |
842 | pnum, far_ackid, far_linkstat, near_ackid); | |
843 | ||
844 | /* | |
845 | * If required, synchronize ackIDs of near and | |
846 | * far sides. | |
847 | */ | |
848 | if ((far_ackid != ((regval & RIO_PORT_N_ACK_OUTSTAND) >> 8)) || | |
849 | (far_ackid != (regval & RIO_PORT_N_ACK_OUTBOUND))) { | |
850 | /* Align near outstanding/outbound ackIDs with | |
851 | * far inbound. | |
852 | */ | |
a93192a5 AB |
853 | rio_write_config_32(rdev, |
854 | rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum), | |
dd5648c9 AB |
855 | (near_ackid << 24) | |
856 | (far_ackid << 8) | far_ackid); | |
857 | /* Align far outstanding/outbound ackIDs with | |
858 | * near inbound. | |
859 | */ | |
860 | far_ackid++; | |
861 | if (nextdev) | |
862 | rio_write_config_32(nextdev, | |
863 | nextdev->phys_efptr + | |
864 | RIO_PORT_N_ACK_STS_CSR(RIO_GET_PORT_NUM(nextdev->swpinfo)), | |
865 | (far_ackid << 24) | | |
866 | (near_ackid << 8) | near_ackid); | |
867 | else | |
868 | pr_debug("RIO_EM: Invalid nextdev pointer (NULL)\n"); | |
869 | } | |
870 | rd_err: | |
a93192a5 | 871 | rio_read_config_32(rdev, |
dd5648c9 AB |
872 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), |
873 | &err_status); | |
874 | pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status); | |
875 | } | |
876 | ||
877 | if ((err_status & RIO_PORT_N_ERR_STS_PW_INP_ES) && nextdev) { | |
878 | pr_debug("RIO_EM: servicing Input Error-Stopped state\n"); | |
879 | rio_get_input_status(nextdev, | |
880 | RIO_GET_PORT_NUM(nextdev->swpinfo), NULL); | |
881 | udelay(50); | |
882 | ||
a93192a5 | 883 | rio_read_config_32(rdev, |
dd5648c9 AB |
884 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), |
885 | &err_status); | |
886 | pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status); | |
887 | } | |
888 | ||
889 | return (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES | | |
890 | RIO_PORT_N_ERR_STS_PW_INP_ES)) ? 1 : 0; | |
891 | } | |
892 | ||
e5cabeb3 AB |
893 | /** |
894 | * rio_inb_pwrite_handler - process inbound port-write message | |
895 | * @pw_msg: pointer to inbound port-write message | |
896 | * | |
897 | * Processes an inbound port-write message. Returns 0 if the request | |
898 | * has been satisfied. | |
899 | */ | |
900 | int rio_inb_pwrite_handler(union rio_pw_msg *pw_msg) | |
901 | { | |
902 | struct rio_dev *rdev; | |
dd5648c9 | 903 | u32 err_status, em_perrdet, em_ltlerrdet; |
e5cabeb3 AB |
904 | int rc, portnum; |
905 | ||
e6536927 | 906 | rdev = rio_get_comptag((pw_msg->em.comptag & RIO_CTAG_UDEVID), NULL); |
e5cabeb3 | 907 | if (rdev == NULL) { |
6429cd49 AB |
908 | /* Device removed or enumeration error */ |
909 | pr_debug("RIO: %s No matching device for CTag 0x%08x\n", | |
e5cabeb3 AB |
910 | __func__, pw_msg->em.comptag); |
911 | return -EIO; | |
912 | } | |
913 | ||
914 | pr_debug("RIO: Port-Write message from %s\n", rio_name(rdev)); | |
915 | ||
916 | #ifdef DEBUG_PW | |
917 | { | |
918 | u32 i; | |
919 | for (i = 0; i < RIO_PW_MSG_SIZE/sizeof(u32);) { | |
dd5648c9 | 920 | pr_debug("0x%02x: %08x %08x %08x %08x\n", |
e5cabeb3 AB |
921 | i*4, pw_msg->raw[i], pw_msg->raw[i + 1], |
922 | pw_msg->raw[i + 2], pw_msg->raw[i + 3]); | |
923 | i += 4; | |
924 | } | |
e5cabeb3 AB |
925 | } |
926 | #endif | |
927 | ||
928 | /* Call an external service function (if such is registered | |
929 | * for this device). This may be the service for endpoints that send | |
930 | * device-specific port-write messages. End-point messages expected | |
931 | * to be handled completely by EP specific device driver. | |
932 | * For switches rc==0 signals that no standard processing required. | |
933 | */ | |
934 | if (rdev->pwcback != NULL) { | |
935 | rc = rdev->pwcback(rdev, pw_msg, 0); | |
936 | if (rc == 0) | |
937 | return 0; | |
938 | } | |
939 | ||
6429cd49 AB |
940 | portnum = pw_msg->em.is_port & 0xFF; |
941 | ||
942 | /* Check if device and route to it are functional: | |
943 | * Sometimes devices may send PW message(s) just before being | |
944 | * powered down (or link being lost). | |
945 | */ | |
946 | if (rio_chk_dev_access(rdev)) { | |
947 | pr_debug("RIO: device access failed - get link partner\n"); | |
948 | /* Scan route to the device and identify failed link. | |
949 | * This will replace device and port reported in PW message. | |
950 | * PW message should not be used after this point. | |
951 | */ | |
952 | if (rio_chk_dev_route(rdev, &rdev, &portnum)) { | |
953 | pr_err("RIO: Route trace for %s failed\n", | |
954 | rio_name(rdev)); | |
955 | return -EIO; | |
956 | } | |
957 | pw_msg = NULL; | |
958 | } | |
959 | ||
e5cabeb3 AB |
960 | /* For End-point devices processing stops here */ |
961 | if (!(rdev->pef & RIO_PEF_SWITCH)) | |
962 | return 0; | |
963 | ||
964 | if (rdev->phys_efptr == 0) { | |
965 | pr_err("RIO_PW: Bad switch initialization for %s\n", | |
966 | rio_name(rdev)); | |
967 | return 0; | |
968 | } | |
969 | ||
e5cabeb3 AB |
970 | /* |
971 | * Process the port-write notification from switch | |
972 | */ | |
e5cabeb3 AB |
973 | if (rdev->rswitch->em_handle) |
974 | rdev->rswitch->em_handle(rdev, portnum); | |
975 | ||
a93192a5 | 976 | rio_read_config_32(rdev, |
e5cabeb3 AB |
977 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), |
978 | &err_status); | |
979 | pr_debug("RIO_PW: SP%d_ERR_STS_CSR=0x%08x\n", portnum, err_status); | |
980 | ||
dd5648c9 | 981 | if (err_status & RIO_PORT_N_ERR_STS_PORT_OK) { |
e5cabeb3 | 982 | |
dd5648c9 AB |
983 | if (!(rdev->rswitch->port_ok & (1 << portnum))) { |
984 | rdev->rswitch->port_ok |= (1 << portnum); | |
985 | rio_set_port_lockout(rdev, portnum, 0); | |
986 | /* Schedule Insertion Service */ | |
987 | pr_debug("RIO_PW: Device Insertion on [%s]-P%d\n", | |
988 | rio_name(rdev), portnum); | |
989 | } | |
e5cabeb3 | 990 | |
dd5648c9 AB |
991 | /* Clear error-stopped states (if reported). |
992 | * Depending on the link partner state, two attempts | |
993 | * may be needed for successful recovery. | |
994 | */ | |
995 | if (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES | | |
996 | RIO_PORT_N_ERR_STS_PW_INP_ES)) { | |
997 | if (rio_clr_err_stopped(rdev, portnum, err_status)) | |
998 | rio_clr_err_stopped(rdev, portnum, 0); | |
999 | } | |
1000 | } else { /* if (err_status & RIO_PORT_N_ERR_STS_PORT_UNINIT) */ | |
e5cabeb3 | 1001 | |
dd5648c9 | 1002 | if (rdev->rswitch->port_ok & (1 << portnum)) { |
e5cabeb3 AB |
1003 | rdev->rswitch->port_ok &= ~(1 << portnum); |
1004 | rio_set_port_lockout(rdev, portnum, 1); | |
1005 | ||
a93192a5 | 1006 | rio_write_config_32(rdev, |
e5cabeb3 AB |
1007 | rdev->phys_efptr + |
1008 | RIO_PORT_N_ACK_STS_CSR(portnum), | |
1009 | RIO_PORT_N_ACK_CLEAR); | |
1010 | ||
1011 | /* Schedule Extraction Service */ | |
1012 | pr_debug("RIO_PW: Device Extraction on [%s]-P%d\n", | |
1013 | rio_name(rdev), portnum); | |
1014 | } | |
dd5648c9 | 1015 | } |
e5cabeb3 | 1016 | |
a93192a5 | 1017 | rio_read_config_32(rdev, |
dd5648c9 AB |
1018 | rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), &em_perrdet); |
1019 | if (em_perrdet) { | |
1020 | pr_debug("RIO_PW: RIO_EM_P%d_ERR_DETECT=0x%08x\n", | |
1021 | portnum, em_perrdet); | |
1022 | /* Clear EM Port N Error Detect CSR */ | |
a93192a5 | 1023 | rio_write_config_32(rdev, |
dd5648c9 AB |
1024 | rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), 0); |
1025 | } | |
1026 | ||
a93192a5 | 1027 | rio_read_config_32(rdev, |
dd5648c9 AB |
1028 | rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, &em_ltlerrdet); |
1029 | if (em_ltlerrdet) { | |
1030 | pr_debug("RIO_PW: RIO_EM_LTL_ERR_DETECT=0x%08x\n", | |
1031 | em_ltlerrdet); | |
1032 | /* Clear EM L/T Layer Error Detect CSR */ | |
a93192a5 | 1033 | rio_write_config_32(rdev, |
dd5648c9 | 1034 | rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, 0); |
e5cabeb3 AB |
1035 | } |
1036 | ||
388c45cc | 1037 | /* Clear remaining error bits and Port-Write Pending bit */ |
a93192a5 | 1038 | rio_write_config_32(rdev, |
dd5648c9 | 1039 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), |
388c45cc | 1040 | err_status); |
e5cabeb3 AB |
1041 | |
1042 | return 0; | |
1043 | } | |
1044 | EXPORT_SYMBOL_GPL(rio_inb_pwrite_handler); | |
1045 | ||
1046 | /** | |
1047 | * rio_mport_get_efb - get pointer to next extended features block | |
1048 | * @port: Master port to issue transaction | |
1049 | * @local: Indicate a local master port or remote device access | |
1050 | * @destid: Destination ID of the device | |
1051 | * @hopcount: Number of switch hops to the device | |
1052 | * @from: Offset of current Extended Feature block header (if 0 starts | |
1053 | * from ExtFeaturePtr) | |
1054 | */ | |
1055 | u32 | |
1056 | rio_mport_get_efb(struct rio_mport *port, int local, u16 destid, | |
1057 | u8 hopcount, u32 from) | |
1058 | { | |
1059 | u32 reg_val; | |
1060 | ||
1061 | if (from == 0) { | |
1062 | if (local) | |
1063 | rio_local_read_config_32(port, RIO_ASM_INFO_CAR, | |
1064 | ®_val); | |
1065 | else | |
1066 | rio_mport_read_config_32(port, destid, hopcount, | |
1067 | RIO_ASM_INFO_CAR, ®_val); | |
1068 | return reg_val & RIO_EXT_FTR_PTR_MASK; | |
1069 | } else { | |
1070 | if (local) | |
1071 | rio_local_read_config_32(port, from, ®_val); | |
1072 | else | |
1073 | rio_mport_read_config_32(port, destid, hopcount, | |
1074 | from, ®_val); | |
1075 | return RIO_GET_BLOCK_ID(reg_val); | |
1076 | } | |
1077 | } | |
a11650e1 | 1078 | EXPORT_SYMBOL_GPL(rio_mport_get_efb); |
e5cabeb3 | 1079 | |
394b701c MP |
1080 | /** |
1081 | * rio_mport_get_feature - query for devices' extended features | |
1082 | * @port: Master port to issue transaction | |
1083 | * @local: Indicate a local master port or remote device access | |
1084 | * @destid: Destination ID of the device | |
1085 | * @hopcount: Number of switch hops to the device | |
1086 | * @ftr: Extended feature code | |
1087 | * | |
1088 | * Tell if a device supports a given RapidIO capability. | |
1089 | * Returns the offset of the requested extended feature | |
1090 | * block within the device's RIO configuration space or | |
1091 | * 0 in case the device does not support it. Possible | |
1092 | * values for @ftr: | |
1093 | * | |
1094 | * %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices | |
1095 | * | |
1096 | * %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices | |
1097 | * | |
1098 | * %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices | |
1099 | * | |
1100 | * %RIO_EFB_SER_EP_ID LP/Serial EP Devices | |
1101 | * | |
1102 | * %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices | |
1103 | * | |
1104 | * %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices | |
1105 | */ | |
1106 | u32 | |
1107 | rio_mport_get_feature(struct rio_mport * port, int local, u16 destid, | |
1108 | u8 hopcount, int ftr) | |
1109 | { | |
1110 | u32 asm_info, ext_ftr_ptr, ftr_header; | |
1111 | ||
1112 | if (local) | |
1113 | rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info); | |
1114 | else | |
1115 | rio_mport_read_config_32(port, destid, hopcount, | |
1116 | RIO_ASM_INFO_CAR, &asm_info); | |
1117 | ||
1118 | ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK; | |
1119 | ||
1120 | while (ext_ftr_ptr) { | |
1121 | if (local) | |
1122 | rio_local_read_config_32(port, ext_ftr_ptr, | |
1123 | &ftr_header); | |
1124 | else | |
1125 | rio_mport_read_config_32(port, destid, hopcount, | |
1126 | ext_ftr_ptr, &ftr_header); | |
1127 | if (RIO_GET_BLOCK_ID(ftr_header) == ftr) | |
1128 | return ext_ftr_ptr; | |
1129 | if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header))) | |
1130 | break; | |
1131 | } | |
1132 | ||
1133 | return 0; | |
1134 | } | |
a11650e1 | 1135 | EXPORT_SYMBOL_GPL(rio_mport_get_feature); |
394b701c MP |
1136 | |
1137 | /** | |
1138 | * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did | |
1139 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids | |
1140 | * @did: RIO did to match or %RIO_ANY_ID to match all dids | |
1141 | * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids | |
1142 | * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids | |
1143 | * @from: Previous RIO device found in search, or %NULL for new search | |
1144 | * | |
1145 | * Iterates through the list of known RIO devices. If a RIO device is | |
1146 | * found with a matching @vid, @did, @asm_vid, @asm_did, the reference | |
1147 | * count to the device is incrememted and a pointer to its device | |
1148 | * structure is returned. Otherwise, %NULL is returned. A new search | |
1149 | * is initiated by passing %NULL to the @from argument. Otherwise, if | |
1150 | * @from is not %NULL, searches continue from next device on the global | |
1151 | * list. The reference count for @from is always decremented if it is | |
1152 | * not %NULL. | |
1153 | */ | |
1154 | struct rio_dev *rio_get_asm(u16 vid, u16 did, | |
1155 | u16 asm_vid, u16 asm_did, struct rio_dev *from) | |
1156 | { | |
1157 | struct list_head *n; | |
1158 | struct rio_dev *rdev; | |
1159 | ||
1160 | WARN_ON(in_interrupt()); | |
1161 | spin_lock(&rio_global_list_lock); | |
1162 | n = from ? from->global_list.next : rio_devices.next; | |
1163 | ||
1164 | while (n && (n != &rio_devices)) { | |
1165 | rdev = rio_dev_g(n); | |
1166 | if ((vid == RIO_ANY_ID || rdev->vid == vid) && | |
1167 | (did == RIO_ANY_ID || rdev->did == did) && | |
1168 | (asm_vid == RIO_ANY_ID || rdev->asm_vid == asm_vid) && | |
1169 | (asm_did == RIO_ANY_ID || rdev->asm_did == asm_did)) | |
1170 | goto exit; | |
1171 | n = n->next; | |
1172 | } | |
1173 | rdev = NULL; | |
1174 | exit: | |
1175 | rio_dev_put(from); | |
1176 | rdev = rio_dev_get(rdev); | |
1177 | spin_unlock(&rio_global_list_lock); | |
1178 | return rdev; | |
1179 | } | |
1180 | ||
1181 | /** | |
1182 | * rio_get_device - Begin or continue searching for a RIO device by vid/did | |
1183 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids | |
1184 | * @did: RIO did to match or %RIO_ANY_ID to match all dids | |
1185 | * @from: Previous RIO device found in search, or %NULL for new search | |
1186 | * | |
1187 | * Iterates through the list of known RIO devices. If a RIO device is | |
1188 | * found with a matching @vid and @did, the reference count to the | |
1189 | * device is incrememted and a pointer to its device structure is returned. | |
1190 | * Otherwise, %NULL is returned. A new search is initiated by passing %NULL | |
1191 | * to the @from argument. Otherwise, if @from is not %NULL, searches | |
1192 | * continue from next device on the global list. The reference count for | |
1193 | * @from is always decremented if it is not %NULL. | |
1194 | */ | |
1195 | struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from) | |
1196 | { | |
1197 | return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from); | |
1198 | } | |
1199 | ||
07590ff0 AB |
1200 | /** |
1201 | * rio_std_route_add_entry - Add switch route table entry using standard | |
1202 | * registers defined in RIO specification rev.1.3 | |
1203 | * @mport: Master port to issue transaction | |
1204 | * @destid: Destination ID of the device | |
1205 | * @hopcount: Number of switch hops to the device | |
1206 | * @table: routing table ID (global or port-specific) | |
1207 | * @route_destid: destID entry in the RT | |
1208 | * @route_port: destination port for specified destID | |
1209 | */ | |
1210 | int rio_std_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount, | |
1211 | u16 table, u16 route_destid, u8 route_port) | |
1212 | { | |
1213 | if (table == RIO_GLOBAL_TABLE) { | |
1214 | rio_mport_write_config_32(mport, destid, hopcount, | |
1215 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, | |
1216 | (u32)route_destid); | |
1217 | rio_mport_write_config_32(mport, destid, hopcount, | |
1218 | RIO_STD_RTE_CONF_PORT_SEL_CSR, | |
1219 | (u32)route_port); | |
1220 | } | |
e5cabeb3 | 1221 | |
07590ff0 AB |
1222 | udelay(10); |
1223 | return 0; | |
1224 | } | |
1225 | ||
1226 | /** | |
1227 | * rio_std_route_get_entry - Read switch route table entry (port number) | |
638c5945 | 1228 | * associated with specified destID using standard registers defined in RIO |
07590ff0 AB |
1229 | * specification rev.1.3 |
1230 | * @mport: Master port to issue transaction | |
1231 | * @destid: Destination ID of the device | |
1232 | * @hopcount: Number of switch hops to the device | |
1233 | * @table: routing table ID (global or port-specific) | |
1234 | * @route_destid: destID entry in the RT | |
1235 | * @route_port: returned destination port for specified destID | |
1236 | */ | |
1237 | int rio_std_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount, | |
1238 | u16 table, u16 route_destid, u8 *route_port) | |
1239 | { | |
1240 | u32 result; | |
1241 | ||
1242 | if (table == RIO_GLOBAL_TABLE) { | |
1243 | rio_mport_write_config_32(mport, destid, hopcount, | |
1244 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid); | |
1245 | rio_mport_read_config_32(mport, destid, hopcount, | |
1246 | RIO_STD_RTE_CONF_PORT_SEL_CSR, &result); | |
1247 | ||
1248 | *route_port = (u8)result; | |
1249 | } | |
1250 | ||
1251 | return 0; | |
1252 | } | |
1253 | ||
1254 | /** | |
1255 | * rio_std_route_clr_table - Clear swotch route table using standard registers | |
1256 | * defined in RIO specification rev.1.3. | |
1257 | * @mport: Master port to issue transaction | |
07590ff0 AB |
1258 | * @destid: Destination ID of the device |
1259 | * @hopcount: Number of switch hops to the device | |
1260 | * @table: routing table ID (global or port-specific) | |
1261 | */ | |
1262 | int rio_std_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount, | |
1263 | u16 table) | |
1264 | { | |
1265 | u32 max_destid = 0xff; | |
1266 | u32 i, pef, id_inc = 1, ext_cfg = 0; | |
1267 | u32 port_sel = RIO_INVALID_ROUTE; | |
1268 | ||
1269 | if (table == RIO_GLOBAL_TABLE) { | |
1270 | rio_mport_read_config_32(mport, destid, hopcount, | |
1271 | RIO_PEF_CAR, &pef); | |
1272 | ||
1273 | if (mport->sys_size) { | |
1274 | rio_mport_read_config_32(mport, destid, hopcount, | |
1275 | RIO_SWITCH_RT_LIMIT, | |
1276 | &max_destid); | |
1277 | max_destid &= RIO_RT_MAX_DESTID; | |
1278 | } | |
1279 | ||
1280 | if (pef & RIO_PEF_EXT_RT) { | |
1281 | ext_cfg = 0x80000000; | |
1282 | id_inc = 4; | |
1283 | port_sel = (RIO_INVALID_ROUTE << 24) | | |
1284 | (RIO_INVALID_ROUTE << 16) | | |
1285 | (RIO_INVALID_ROUTE << 8) | | |
1286 | RIO_INVALID_ROUTE; | |
1287 | } | |
1288 | ||
1289 | for (i = 0; i <= max_destid;) { | |
1290 | rio_mport_write_config_32(mport, destid, hopcount, | |
1291 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, | |
1292 | ext_cfg | i); | |
1293 | rio_mport_write_config_32(mport, destid, hopcount, | |
1294 | RIO_STD_RTE_CONF_PORT_SEL_CSR, | |
1295 | port_sel); | |
1296 | i += id_inc; | |
1297 | } | |
1298 | } | |
1299 | ||
1300 | udelay(10); | |
1301 | return 0; | |
1302 | } | |
1303 | ||
e42d98eb AB |
1304 | #ifdef CONFIG_RAPIDIO_DMA_ENGINE |
1305 | ||
1306 | static bool rio_chan_filter(struct dma_chan *chan, void *arg) | |
1307 | { | |
1308 | struct rio_dev *rdev = arg; | |
1309 | ||
1310 | /* Check that DMA device belongs to the right MPORT */ | |
1311 | return (rdev->net->hport == | |
1312 | container_of(chan->device, struct rio_mport, dma)); | |
1313 | } | |
1314 | ||
1315 | /** | |
1316 | * rio_request_dma - request RapidIO capable DMA channel that supports | |
1317 | * specified target RapidIO device. | |
1318 | * @rdev: RIO device control structure | |
1319 | * | |
1320 | * Returns pointer to allocated DMA channel or NULL if failed. | |
1321 | */ | |
1322 | struct dma_chan *rio_request_dma(struct rio_dev *rdev) | |
1323 | { | |
1324 | dma_cap_mask_t mask; | |
1325 | struct dma_chan *dchan; | |
1326 | ||
1327 | dma_cap_zero(mask); | |
1328 | dma_cap_set(DMA_SLAVE, mask); | |
1329 | dchan = dma_request_channel(mask, rio_chan_filter, rdev); | |
1330 | ||
1331 | return dchan; | |
1332 | } | |
1333 | EXPORT_SYMBOL_GPL(rio_request_dma); | |
1334 | ||
1335 | /** | |
1336 | * rio_release_dma - release specified DMA channel | |
1337 | * @dchan: DMA channel to release | |
1338 | */ | |
1339 | void rio_release_dma(struct dma_chan *dchan) | |
1340 | { | |
1341 | dma_release_channel(dchan); | |
1342 | } | |
1343 | EXPORT_SYMBOL_GPL(rio_release_dma); | |
1344 | ||
1345 | /** | |
1346 | * rio_dma_prep_slave_sg - RapidIO specific wrapper | |
1347 | * for device_prep_slave_sg callback defined by DMAENGINE. | |
1348 | * @rdev: RIO device control structure | |
1349 | * @dchan: DMA channel to configure | |
1350 | * @data: RIO specific data descriptor | |
1351 | * @direction: DMA data transfer direction (TO or FROM the device) | |
1352 | * @flags: dmaengine defined flags | |
1353 | * | |
1354 | * Initializes RapidIO capable DMA channel for the specified data transfer. | |
1355 | * Uses DMA channel private extension to pass information related to remote | |
1356 | * target RIO device. | |
1357 | * Returns pointer to DMA transaction descriptor or NULL if failed. | |
1358 | */ | |
1359 | struct dma_async_tx_descriptor *rio_dma_prep_slave_sg(struct rio_dev *rdev, | |
1360 | struct dma_chan *dchan, struct rio_dma_data *data, | |
1361 | enum dma_transfer_direction direction, unsigned long flags) | |
1362 | { | |
1363 | struct dma_async_tx_descriptor *txd = NULL; | |
1364 | struct rio_dma_ext rio_ext; | |
1365 | ||
1366 | if (dchan->device->device_prep_slave_sg == NULL) { | |
1367 | pr_err("%s: prep_rio_sg == NULL\n", __func__); | |
1368 | return NULL; | |
1369 | } | |
1370 | ||
1371 | rio_ext.destid = rdev->destid; | |
1372 | rio_ext.rio_addr_u = data->rio_addr_u; | |
1373 | rio_ext.rio_addr = data->rio_addr; | |
1374 | rio_ext.wr_type = data->wr_type; | |
1375 | ||
1376 | txd = dmaengine_prep_rio_sg(dchan, data->sg, data->sg_len, | |
1377 | direction, flags, &rio_ext); | |
1378 | ||
1379 | return txd; | |
1380 | } | |
1381 | EXPORT_SYMBOL_GPL(rio_dma_prep_slave_sg); | |
1382 | ||
1383 | #endif /* CONFIG_RAPIDIO_DMA_ENGINE */ | |
1384 | ||
bc8fcfea AB |
1385 | /** |
1386 | * rio_find_mport - find RIO mport by its ID | |
1387 | * @mport_id: number (ID) of mport device | |
1388 | * | |
1389 | * Given a RIO mport number, the desired mport is located | |
1390 | * in the global list of mports. If the mport is found, a pointer to its | |
1391 | * data structure is returned. If no mport is found, %NULL is returned. | |
1392 | */ | |
1393 | struct rio_mport *rio_find_mport(int mport_id) | |
1394 | { | |
1395 | struct rio_mport *port; | |
1396 | ||
1397 | mutex_lock(&rio_mport_list_lock); | |
1398 | list_for_each_entry(port, &rio_mports, node) { | |
1399 | if (port->id == mport_id) | |
1400 | goto found; | |
1401 | } | |
1402 | port = NULL; | |
1403 | found: | |
1404 | mutex_unlock(&rio_mport_list_lock); | |
1405 | ||
1406 | return port; | |
1407 | } | |
1408 | ||
a11650e1 AB |
1409 | /** |
1410 | * rio_register_scan - enumeration/discovery method registration interface | |
1411 | * @mport_id: mport device ID for which fabric scan routine has to be set | |
1412 | * (RIO_MPORT_ANY = set for all available mports) | |
1413 | * @scan_ops: enumeration/discovery control structure | |
1414 | * | |
1415 | * Assigns enumeration or discovery method to the specified mport device (or all | |
1416 | * available mports if RIO_MPORT_ANY is specified). | |
1417 | * Returns error if the mport already has an enumerator attached to it. | |
1418 | * In case of RIO_MPORT_ANY ignores ports with valid scan routines and returns | |
1419 | * an error if was unable to find at least one available mport. | |
1420 | */ | |
1421 | int rio_register_scan(int mport_id, struct rio_scan *scan_ops) | |
1422 | { | |
1423 | struct rio_mport *port; | |
1424 | int rc = -EBUSY; | |
1425 | ||
1426 | mutex_lock(&rio_mport_list_lock); | |
1427 | list_for_each_entry(port, &rio_mports, node) { | |
1428 | if (port->id == mport_id || mport_id == RIO_MPORT_ANY) { | |
1429 | if (port->nscan && mport_id == RIO_MPORT_ANY) | |
1430 | continue; | |
1431 | else if (port->nscan) | |
1432 | break; | |
1433 | ||
1434 | port->nscan = scan_ops; | |
1435 | rc = 0; | |
1436 | ||
1437 | if (mport_id != RIO_MPORT_ANY) | |
1438 | break; | |
1439 | } | |
1440 | } | |
1441 | mutex_unlock(&rio_mport_list_lock); | |
1442 | ||
1443 | return rc; | |
1444 | } | |
1445 | EXPORT_SYMBOL_GPL(rio_register_scan); | |
1446 | ||
1447 | /** | |
1448 | * rio_unregister_scan - removes enumeration/discovery method from mport | |
1449 | * @mport_id: mport device ID for which fabric scan routine has to be | |
1450 | * unregistered (RIO_MPORT_ANY = set for all available mports) | |
1451 | * | |
1452 | * Removes enumeration or discovery method assigned to the specified mport | |
1453 | * device (or all available mports if RIO_MPORT_ANY is specified). | |
1454 | */ | |
1455 | int rio_unregister_scan(int mport_id) | |
1456 | { | |
1457 | struct rio_mport *port; | |
1458 | ||
1459 | mutex_lock(&rio_mport_list_lock); | |
1460 | list_for_each_entry(port, &rio_mports, node) { | |
1461 | if (port->id == mport_id || mport_id == RIO_MPORT_ANY) { | |
1462 | if (port->nscan) | |
1463 | port->nscan = NULL; | |
1464 | if (mport_id != RIO_MPORT_ANY) | |
1465 | break; | |
1466 | } | |
1467 | } | |
1468 | mutex_unlock(&rio_mport_list_lock); | |
1469 | ||
1470 | return 0; | |
1471 | } | |
1472 | EXPORT_SYMBOL_GPL(rio_unregister_scan); | |
1473 | ||
394b701c MP |
1474 | static void rio_fixup_device(struct rio_dev *dev) |
1475 | { | |
1476 | } | |
1477 | ||
305c891e | 1478 | static int rio_init(void) |
394b701c MP |
1479 | { |
1480 | struct rio_dev *dev = NULL; | |
1481 | ||
1482 | while ((dev = rio_get_device(RIO_ANY_ID, RIO_ANY_ID, dev)) != NULL) { | |
1483 | rio_fixup_device(dev); | |
1484 | } | |
1485 | return 0; | |
1486 | } | |
1487 | ||
005842ef AB |
1488 | static struct workqueue_struct *rio_wq; |
1489 | ||
1490 | struct rio_disc_work { | |
1491 | struct work_struct work; | |
1492 | struct rio_mport *mport; | |
1493 | }; | |
1494 | ||
305c891e | 1495 | static void disc_work_handler(struct work_struct *_work) |
005842ef AB |
1496 | { |
1497 | struct rio_disc_work *work; | |
1498 | ||
1499 | work = container_of(_work, struct rio_disc_work, work); | |
1500 | pr_debug("RIO: discovery work for mport %d %s\n", | |
1501 | work->mport->id, work->mport->name); | |
bc8fcfea | 1502 | work->mport->nscan->discover(work->mport, 0); |
005842ef AB |
1503 | } |
1504 | ||
305c891e | 1505 | int rio_init_mports(void) |
394b701c | 1506 | { |
394b701c | 1507 | struct rio_mport *port; |
005842ef | 1508 | struct rio_disc_work *work; |
2574740d AB |
1509 | int n = 0; |
1510 | ||
1511 | if (!next_portid) | |
1512 | return -ENODEV; | |
394b701c | 1513 | |
2574740d AB |
1514 | /* |
1515 | * First, run enumerations and check if we need to perform discovery | |
1516 | * on any of the registered mports. | |
1517 | */ | |
a11650e1 | 1518 | mutex_lock(&rio_mport_list_lock); |
394b701c | 1519 | list_for_each_entry(port, &rio_mports, node) { |
a11650e1 AB |
1520 | if (port->host_deviceid >= 0) { |
1521 | if (port->nscan) | |
bc8fcfea | 1522 | port->nscan->enumerate(port, 0); |
a11650e1 | 1523 | } else |
2574740d AB |
1524 | n++; |
1525 | } | |
a11650e1 | 1526 | mutex_unlock(&rio_mport_list_lock); |
2574740d AB |
1527 | |
1528 | if (!n) | |
1529 | goto no_disc; | |
1530 | ||
1531 | /* | |
1532 | * If we have mports that require discovery schedule a discovery work | |
1533 | * for each of them. If the code below fails to allocate needed | |
1534 | * resources, exit without error to keep results of enumeration | |
1535 | * process (if any). | |
1536 | * TODO: Implement restart of dicovery process for all or | |
1537 | * individual discovering mports. | |
1538 | */ | |
1539 | rio_wq = alloc_workqueue("riodisc", 0, 0); | |
1540 | if (!rio_wq) { | |
1541 | pr_err("RIO: unable allocate rio_wq\n"); | |
1542 | goto no_disc; | |
005842ef AB |
1543 | } |
1544 | ||
2574740d AB |
1545 | work = kcalloc(n, sizeof *work, GFP_KERNEL); |
1546 | if (!work) { | |
1547 | pr_err("RIO: no memory for work struct\n"); | |
005842ef | 1548 | destroy_workqueue(rio_wq); |
2574740d | 1549 | goto no_disc; |
394b701c MP |
1550 | } |
1551 | ||
2574740d | 1552 | n = 0; |
a11650e1 | 1553 | mutex_lock(&rio_mport_list_lock); |
2574740d | 1554 | list_for_each_entry(port, &rio_mports, node) { |
a11650e1 | 1555 | if (port->host_deviceid < 0 && port->nscan) { |
2574740d AB |
1556 | work[n].mport = port; |
1557 | INIT_WORK(&work[n].work, disc_work_handler); | |
1558 | queue_work(rio_wq, &work[n].work); | |
1559 | n++; | |
1560 | } | |
1561 | } | |
a11650e1 | 1562 | mutex_unlock(&rio_mport_list_lock); |
2574740d AB |
1563 | |
1564 | flush_workqueue(rio_wq); | |
1565 | pr_debug("RIO: destroy discovery workqueue\n"); | |
1566 | destroy_workqueue(rio_wq); | |
1567 | kfree(work); | |
1568 | ||
1569 | no_disc: | |
2f809985 AB |
1570 | rio_init(); |
1571 | ||
c1256ebe | 1572 | return 0; |
394b701c MP |
1573 | } |
1574 | ||
569fccb6 AB |
1575 | static int hdids[RIO_MAX_MPORTS + 1]; |
1576 | ||
1577 | static int rio_get_hdid(int index) | |
1578 | { | |
1579 | if (!hdids[0] || hdids[0] <= index || index >= RIO_MAX_MPORTS) | |
1580 | return -1; | |
1581 | ||
1582 | return hdids[index + 1]; | |
1583 | } | |
1584 | ||
1585 | static int rio_hdid_setup(char *str) | |
1586 | { | |
1587 | (void)get_options(str, ARRAY_SIZE(hdids), hdids); | |
1588 | return 1; | |
1589 | } | |
1590 | ||
1591 | __setup("riohdid=", rio_hdid_setup); | |
1592 | ||
59f99965 | 1593 | int rio_register_mport(struct rio_mport *port) |
394b701c | 1594 | { |
569fccb6 AB |
1595 | if (next_portid >= RIO_MAX_MPORTS) { |
1596 | pr_err("RIO: reached specified max number of mports\n"); | |
59f99965 | 1597 | return 1; |
569fccb6 AB |
1598 | } |
1599 | ||
1600 | port->id = next_portid++; | |
1601 | port->host_deviceid = rio_get_hdid(port->id); | |
a11650e1 AB |
1602 | port->nscan = NULL; |
1603 | mutex_lock(&rio_mport_list_lock); | |
394b701c | 1604 | list_add_tail(&port->node, &rio_mports); |
a11650e1 | 1605 | mutex_unlock(&rio_mport_list_lock); |
59f99965 | 1606 | return 0; |
394b701c MP |
1607 | } |
1608 | ||
1609 | EXPORT_SYMBOL_GPL(rio_local_get_device_id); | |
1610 | EXPORT_SYMBOL_GPL(rio_get_device); | |
1611 | EXPORT_SYMBOL_GPL(rio_get_asm); | |
1612 | EXPORT_SYMBOL_GPL(rio_request_inb_dbell); | |
1613 | EXPORT_SYMBOL_GPL(rio_release_inb_dbell); | |
1614 | EXPORT_SYMBOL_GPL(rio_request_outb_dbell); | |
1615 | EXPORT_SYMBOL_GPL(rio_release_outb_dbell); | |
1616 | EXPORT_SYMBOL_GPL(rio_request_inb_mbox); | |
1617 | EXPORT_SYMBOL_GPL(rio_release_inb_mbox); | |
1618 | EXPORT_SYMBOL_GPL(rio_request_outb_mbox); | |
1619 | EXPORT_SYMBOL_GPL(rio_release_outb_mbox); | |
a11650e1 | 1620 | EXPORT_SYMBOL_GPL(rio_init_mports); |