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