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 | * | |
fdf90abc | 8 | * Copyright 2009 - 2013 Integrated Device Technology, Inc. |
e5cabeb3 | 9 | * Alex Bounine <alexandre.bounine@idt.com> |
e5cabeb3 | 10 | * |
394b701c MP |
11 | * This program is free software; you can redistribute it and/or modify it |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
15 | */ | |
16 | ||
394b701c MP |
17 | #include <linux/types.h> |
18 | #include <linux/kernel.h> | |
19 | ||
20 | #include <linux/delay.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/rio.h> | |
23 | #include <linux/rio_drv.h> | |
24 | #include <linux/rio_ids.h> | |
25 | #include <linux/rio_regs.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/spinlock.h> | |
de25968c | 28 | #include <linux/slab.h> |
5febf1cd | 29 | #include <linux/interrupt.h> |
394b701c MP |
30 | |
31 | #include "rio.h" | |
32 | ||
fdf90abc AB |
33 | MODULE_DESCRIPTION("RapidIO Subsystem Core"); |
34 | MODULE_AUTHOR("Matt Porter <mporter@kernel.crashing.org>"); | |
35 | MODULE_AUTHOR("Alexandre Bounine <alexandre.bounine@idt.com>"); | |
36 | MODULE_LICENSE("GPL"); | |
37 | ||
38 | static int hdid[RIO_MAX_MPORTS]; | |
39 | static int ids_num; | |
40 | module_param_array(hdid, int, &ids_num, 0); | |
41 | MODULE_PARM_DESC(hdid, | |
42 | "Destination ID assignment to local RapidIO controllers"); | |
43 | ||
a11650e1 AB |
44 | static LIST_HEAD(rio_devices); |
45 | static DEFINE_SPINLOCK(rio_global_list_lock); | |
46 | ||
394b701c | 47 | static LIST_HEAD(rio_mports); |
9edbc30b | 48 | static LIST_HEAD(rio_scans); |
a11650e1 | 49 | static DEFINE_MUTEX(rio_mport_list_lock); |
569fccb6 | 50 | static unsigned char next_portid; |
da1589f0 | 51 | static DEFINE_SPINLOCK(rio_mmap_lock); |
394b701c MP |
52 | |
53 | /** | |
54 | * rio_local_get_device_id - Get the base/extended device id for a port | |
55 | * @port: RIO master port from which to get the deviceid | |
56 | * | |
57 | * Reads the base/extended device id from the local device | |
58 | * implementing the master port. Returns the 8/16-bit device | |
59 | * id. | |
60 | */ | |
61 | u16 rio_local_get_device_id(struct rio_mport *port) | |
62 | { | |
63 | u32 result; | |
64 | ||
65 | rio_local_read_config_32(port, RIO_DID_CSR, &result); | |
66 | ||
e0423236 | 67 | return (RIO_GET_DID(port->sys_size, result)); |
394b701c MP |
68 | } |
69 | ||
a11650e1 AB |
70 | /** |
71 | * rio_add_device- Adds a RIO device to the device model | |
72 | * @rdev: RIO device | |
73 | * | |
74 | * Adds the RIO device to the global device list and adds the RIO | |
75 | * device to the RIO device list. Creates the generic sysfs nodes | |
76 | * for an RIO device. | |
77 | */ | |
78 | int rio_add_device(struct rio_dev *rdev) | |
79 | { | |
80 | int err; | |
81 | ||
82 | err = device_add(&rdev->dev); | |
83 | if (err) | |
84 | return err; | |
85 | ||
86 | spin_lock(&rio_global_list_lock); | |
87 | list_add_tail(&rdev->global_list, &rio_devices); | |
88 | spin_unlock(&rio_global_list_lock); | |
89 | ||
90 | rio_create_sysfs_dev_files(rdev); | |
91 | ||
92 | return 0; | |
93 | } | |
94 | EXPORT_SYMBOL_GPL(rio_add_device); | |
95 | ||
394b701c MP |
96 | /** |
97 | * rio_request_inb_mbox - request inbound mailbox service | |
98 | * @mport: RIO master port from which to allocate the mailbox resource | |
6978bbc0 | 99 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
100 | * @mbox: Mailbox number to claim |
101 | * @entries: Number of entries in inbound mailbox queue | |
102 | * @minb: Callback to execute when inbound message is received | |
103 | * | |
104 | * Requests ownership of an inbound mailbox resource and binds | |
105 | * a callback function to the resource. Returns %0 on success. | |
106 | */ | |
107 | int rio_request_inb_mbox(struct rio_mport *mport, | |
6978bbc0 | 108 | void *dev_id, |
394b701c MP |
109 | int mbox, |
110 | int entries, | |
6978bbc0 | 111 | void (*minb) (struct rio_mport * mport, void *dev_id, int mbox, |
394b701c MP |
112 | int slot)) |
113 | { | |
f8f06269 AB |
114 | int rc = -ENOSYS; |
115 | struct resource *res; | |
394b701c | 116 | |
f8f06269 AB |
117 | if (mport->ops->open_inb_mbox == NULL) |
118 | goto out; | |
119 | ||
120 | res = kmalloc(sizeof(struct resource), GFP_KERNEL); | |
394b701c MP |
121 | |
122 | if (res) { | |
123 | rio_init_mbox_res(res, mbox, mbox); | |
124 | ||
125 | /* Make sure this mailbox isn't in use */ | |
126 | if ((rc = | |
127 | request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE], | |
128 | res)) < 0) { | |
129 | kfree(res); | |
130 | goto out; | |
131 | } | |
132 | ||
133 | mport->inb_msg[mbox].res = res; | |
134 | ||
135 | /* Hook the inbound message callback */ | |
136 | mport->inb_msg[mbox].mcback = minb; | |
137 | ||
f8f06269 | 138 | rc = mport->ops->open_inb_mbox(mport, dev_id, mbox, entries); |
394b701c MP |
139 | } else |
140 | rc = -ENOMEM; | |
141 | ||
142 | out: | |
143 | return rc; | |
144 | } | |
145 | ||
146 | /** | |
147 | * rio_release_inb_mbox - release inbound mailbox message service | |
148 | * @mport: RIO master port from which to release the mailbox resource | |
149 | * @mbox: Mailbox number to release | |
150 | * | |
151 | * Releases ownership of an inbound mailbox resource. Returns 0 | |
152 | * if the request has been satisfied. | |
153 | */ | |
154 | int rio_release_inb_mbox(struct rio_mport *mport, int mbox) | |
155 | { | |
f8f06269 AB |
156 | if (mport->ops->close_inb_mbox) { |
157 | mport->ops->close_inb_mbox(mport, mbox); | |
394b701c | 158 | |
f8f06269 AB |
159 | /* Release the mailbox resource */ |
160 | return release_resource(mport->inb_msg[mbox].res); | |
161 | } else | |
162 | return -ENOSYS; | |
394b701c MP |
163 | } |
164 | ||
165 | /** | |
166 | * rio_request_outb_mbox - request outbound mailbox service | |
167 | * @mport: RIO master port from which to allocate the mailbox resource | |
6978bbc0 | 168 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
169 | * @mbox: Mailbox number to claim |
170 | * @entries: Number of entries in outbound mailbox queue | |
171 | * @moutb: Callback to execute when outbound message is sent | |
172 | * | |
173 | * Requests ownership of an outbound mailbox resource and binds | |
174 | * a callback function to the resource. Returns 0 on success. | |
175 | */ | |
176 | int rio_request_outb_mbox(struct rio_mport *mport, | |
6978bbc0 | 177 | void *dev_id, |
394b701c MP |
178 | int mbox, |
179 | int entries, | |
6978bbc0 | 180 | void (*moutb) (struct rio_mport * mport, void *dev_id, int mbox, int slot)) |
394b701c | 181 | { |
f8f06269 AB |
182 | int rc = -ENOSYS; |
183 | struct resource *res; | |
394b701c | 184 | |
f8f06269 AB |
185 | if (mport->ops->open_outb_mbox == NULL) |
186 | goto out; | |
187 | ||
188 | res = kmalloc(sizeof(struct resource), GFP_KERNEL); | |
394b701c MP |
189 | |
190 | if (res) { | |
191 | rio_init_mbox_res(res, mbox, mbox); | |
192 | ||
193 | /* Make sure this outbound mailbox isn't in use */ | |
194 | if ((rc = | |
195 | request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE], | |
196 | res)) < 0) { | |
197 | kfree(res); | |
198 | goto out; | |
199 | } | |
200 | ||
201 | mport->outb_msg[mbox].res = res; | |
202 | ||
203 | /* Hook the inbound message callback */ | |
204 | mport->outb_msg[mbox].mcback = moutb; | |
205 | ||
f8f06269 | 206 | rc = mport->ops->open_outb_mbox(mport, dev_id, mbox, entries); |
394b701c MP |
207 | } else |
208 | rc = -ENOMEM; | |
209 | ||
210 | out: | |
211 | return rc; | |
212 | } | |
213 | ||
214 | /** | |
215 | * rio_release_outb_mbox - release outbound mailbox message service | |
216 | * @mport: RIO master port from which to release the mailbox resource | |
217 | * @mbox: Mailbox number to release | |
218 | * | |
219 | * Releases ownership of an inbound mailbox resource. Returns 0 | |
220 | * if the request has been satisfied. | |
221 | */ | |
222 | int rio_release_outb_mbox(struct rio_mport *mport, int mbox) | |
223 | { | |
f8f06269 AB |
224 | if (mport->ops->close_outb_mbox) { |
225 | mport->ops->close_outb_mbox(mport, mbox); | |
394b701c | 226 | |
f8f06269 AB |
227 | /* Release the mailbox resource */ |
228 | return release_resource(mport->outb_msg[mbox].res); | |
229 | } else | |
230 | return -ENOSYS; | |
394b701c MP |
231 | } |
232 | ||
233 | /** | |
234 | * rio_setup_inb_dbell - bind inbound doorbell callback | |
235 | * @mport: RIO master port to bind the doorbell callback | |
6978bbc0 | 236 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
237 | * @res: Doorbell message resource |
238 | * @dinb: Callback to execute when doorbell is received | |
239 | * | |
240 | * Adds a doorbell resource/callback pair into a port's | |
241 | * doorbell event list. Returns 0 if the request has been | |
242 | * satisfied. | |
243 | */ | |
244 | static int | |
6978bbc0 MP |
245 | rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res, |
246 | void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst, | |
394b701c MP |
247 | u16 info)) |
248 | { | |
249 | int rc = 0; | |
250 | struct rio_dbell *dbell; | |
251 | ||
252 | if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) { | |
253 | rc = -ENOMEM; | |
254 | goto out; | |
255 | } | |
256 | ||
257 | dbell->res = res; | |
258 | dbell->dinb = dinb; | |
6978bbc0 | 259 | dbell->dev_id = dev_id; |
394b701c MP |
260 | |
261 | list_add_tail(&dbell->node, &mport->dbells); | |
262 | ||
263 | out: | |
264 | return rc; | |
265 | } | |
266 | ||
267 | /** | |
268 | * rio_request_inb_dbell - request inbound doorbell message service | |
269 | * @mport: RIO master port from which to allocate the doorbell resource | |
6978bbc0 | 270 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
271 | * @start: Doorbell info range start |
272 | * @end: Doorbell info range end | |
273 | * @dinb: Callback to execute when doorbell is received | |
274 | * | |
275 | * Requests ownership of an inbound doorbell resource and binds | |
276 | * a callback function to the resource. Returns 0 if the request | |
277 | * has been satisfied. | |
278 | */ | |
279 | int rio_request_inb_dbell(struct rio_mport *mport, | |
6978bbc0 | 280 | void *dev_id, |
394b701c MP |
281 | u16 start, |
282 | u16 end, | |
6978bbc0 | 283 | void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, |
394b701c MP |
284 | u16 dst, u16 info)) |
285 | { | |
286 | int rc = 0; | |
287 | ||
288 | struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); | |
289 | ||
290 | if (res) { | |
291 | rio_init_dbell_res(res, start, end); | |
292 | ||
293 | /* Make sure these doorbells aren't in use */ | |
294 | if ((rc = | |
295 | request_resource(&mport->riores[RIO_DOORBELL_RESOURCE], | |
296 | res)) < 0) { | |
297 | kfree(res); | |
298 | goto out; | |
299 | } | |
300 | ||
301 | /* Hook the doorbell callback */ | |
6978bbc0 | 302 | rc = rio_setup_inb_dbell(mport, dev_id, res, dinb); |
394b701c MP |
303 | } else |
304 | rc = -ENOMEM; | |
305 | ||
306 | out: | |
307 | return rc; | |
308 | } | |
309 | ||
310 | /** | |
311 | * rio_release_inb_dbell - release inbound doorbell message service | |
312 | * @mport: RIO master port from which to release the doorbell resource | |
313 | * @start: Doorbell info range start | |
314 | * @end: Doorbell info range end | |
315 | * | |
316 | * Releases ownership of an inbound doorbell resource and removes | |
317 | * callback from the doorbell event list. Returns 0 if the request | |
318 | * has been satisfied. | |
319 | */ | |
320 | int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end) | |
321 | { | |
322 | int rc = 0, found = 0; | |
323 | struct rio_dbell *dbell; | |
324 | ||
325 | list_for_each_entry(dbell, &mport->dbells, node) { | |
326 | if ((dbell->res->start == start) && (dbell->res->end == end)) { | |
327 | found = 1; | |
328 | break; | |
329 | } | |
330 | } | |
331 | ||
332 | /* If we can't find an exact match, fail */ | |
333 | if (!found) { | |
334 | rc = -EINVAL; | |
335 | goto out; | |
336 | } | |
337 | ||
338 | /* Delete from list */ | |
339 | list_del(&dbell->node); | |
340 | ||
341 | /* Release the doorbell resource */ | |
342 | rc = release_resource(dbell->res); | |
343 | ||
344 | /* Free the doorbell event */ | |
345 | kfree(dbell); | |
346 | ||
347 | out: | |
348 | return rc; | |
349 | } | |
350 | ||
351 | /** | |
352 | * rio_request_outb_dbell - request outbound doorbell message range | |
353 | * @rdev: RIO device from which to allocate the doorbell resource | |
354 | * @start: Doorbell message range start | |
355 | * @end: Doorbell message range end | |
356 | * | |
357 | * Requests ownership of a doorbell message range. Returns a resource | |
358 | * if the request has been satisfied or %NULL on failure. | |
359 | */ | |
360 | struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start, | |
361 | u16 end) | |
362 | { | |
363 | struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); | |
364 | ||
365 | if (res) { | |
366 | rio_init_dbell_res(res, start, end); | |
367 | ||
368 | /* Make sure these doorbells aren't in use */ | |
369 | if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res) | |
370 | < 0) { | |
371 | kfree(res); | |
372 | res = NULL; | |
373 | } | |
374 | } | |
375 | ||
376 | return res; | |
377 | } | |
378 | ||
379 | /** | |
380 | * rio_release_outb_dbell - release outbound doorbell message range | |
381 | * @rdev: RIO device from which to release the doorbell resource | |
382 | * @res: Doorbell resource to be freed | |
383 | * | |
384 | * Releases ownership of a doorbell message range. Returns 0 if the | |
385 | * request has been satisfied. | |
386 | */ | |
387 | int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res) | |
388 | { | |
389 | int rc = release_resource(res); | |
390 | ||
391 | kfree(res); | |
392 | ||
393 | return rc; | |
394 | } | |
395 | ||
e5cabeb3 AB |
396 | /** |
397 | * rio_request_inb_pwrite - request inbound port-write message service | |
97ef6f74 | 398 | * @rdev: RIO device to which register inbound port-write callback routine |
e5cabeb3 AB |
399 | * @pwcback: Callback routine to execute when port-write is received |
400 | * | |
401 | * Binds a port-write callback function to the RapidIO device. | |
402 | * Returns 0 if the request has been satisfied. | |
403 | */ | |
404 | int rio_request_inb_pwrite(struct rio_dev *rdev, | |
405 | int (*pwcback)(struct rio_dev *rdev, union rio_pw_msg *msg, int step)) | |
406 | { | |
407 | int rc = 0; | |
408 | ||
409 | spin_lock(&rio_global_list_lock); | |
410 | if (rdev->pwcback != NULL) | |
411 | rc = -ENOMEM; | |
412 | else | |
413 | rdev->pwcback = pwcback; | |
414 | ||
415 | spin_unlock(&rio_global_list_lock); | |
416 | return rc; | |
417 | } | |
418 | EXPORT_SYMBOL_GPL(rio_request_inb_pwrite); | |
419 | ||
420 | /** | |
421 | * rio_release_inb_pwrite - release inbound port-write message service | |
422 | * @rdev: RIO device which registered for inbound port-write callback | |
423 | * | |
424 | * Removes callback from the rio_dev structure. Returns 0 if the request | |
425 | * has been satisfied. | |
426 | */ | |
427 | int rio_release_inb_pwrite(struct rio_dev *rdev) | |
428 | { | |
429 | int rc = -ENOMEM; | |
430 | ||
431 | spin_lock(&rio_global_list_lock); | |
432 | if (rdev->pwcback) { | |
433 | rdev->pwcback = NULL; | |
434 | rc = 0; | |
435 | } | |
436 | ||
437 | spin_unlock(&rio_global_list_lock); | |
438 | return rc; | |
439 | } | |
440 | EXPORT_SYMBOL_GPL(rio_release_inb_pwrite); | |
441 | ||
da1589f0 AB |
442 | /** |
443 | * rio_map_inb_region -- Map inbound memory region. | |
444 | * @mport: Master port. | |
2ca3cb50 | 445 | * @local: physical address of memory region to be mapped |
da1589f0 AB |
446 | * @rbase: RIO base address assigned to this window |
447 | * @size: Size of the memory region | |
448 | * @rflags: Flags for mapping. | |
449 | * | |
450 | * Return: 0 -- Success. | |
451 | * | |
452 | * This function will create the mapping from RIO space to local memory. | |
453 | */ | |
454 | int rio_map_inb_region(struct rio_mport *mport, dma_addr_t local, | |
455 | u64 rbase, u32 size, u32 rflags) | |
456 | { | |
457 | int rc = 0; | |
458 | unsigned long flags; | |
459 | ||
460 | if (!mport->ops->map_inb) | |
461 | return -1; | |
462 | spin_lock_irqsave(&rio_mmap_lock, flags); | |
463 | rc = mport->ops->map_inb(mport, local, rbase, size, rflags); | |
464 | spin_unlock_irqrestore(&rio_mmap_lock, flags); | |
465 | return rc; | |
466 | } | |
467 | EXPORT_SYMBOL_GPL(rio_map_inb_region); | |
468 | ||
469 | /** | |
470 | * rio_unmap_inb_region -- Unmap the inbound memory region | |
471 | * @mport: Master port | |
472 | * @lstart: physical address of memory region to be unmapped | |
473 | */ | |
474 | void rio_unmap_inb_region(struct rio_mport *mport, dma_addr_t lstart) | |
475 | { | |
476 | unsigned long flags; | |
477 | if (!mport->ops->unmap_inb) | |
478 | return; | |
479 | spin_lock_irqsave(&rio_mmap_lock, flags); | |
480 | mport->ops->unmap_inb(mport, lstart); | |
481 | spin_unlock_irqrestore(&rio_mmap_lock, flags); | |
482 | } | |
483 | EXPORT_SYMBOL_GPL(rio_unmap_inb_region); | |
484 | ||
e5cabeb3 AB |
485 | /** |
486 | * rio_mport_get_physefb - Helper function that returns register offset | |
487 | * for Physical Layer Extended Features Block. | |
97ef6f74 RD |
488 | * @port: Master port to issue transaction |
489 | * @local: Indicate a local master port or remote device access | |
490 | * @destid: Destination ID of the device | |
491 | * @hopcount: Number of switch hops to the device | |
e5cabeb3 AB |
492 | */ |
493 | u32 | |
494 | rio_mport_get_physefb(struct rio_mport *port, int local, | |
495 | u16 destid, u8 hopcount) | |
496 | { | |
497 | u32 ext_ftr_ptr; | |
498 | u32 ftr_header; | |
499 | ||
500 | ext_ftr_ptr = rio_mport_get_efb(port, local, destid, hopcount, 0); | |
501 | ||
502 | while (ext_ftr_ptr) { | |
503 | if (local) | |
504 | rio_local_read_config_32(port, ext_ftr_ptr, | |
505 | &ftr_header); | |
506 | else | |
507 | rio_mport_read_config_32(port, destid, hopcount, | |
508 | ext_ftr_ptr, &ftr_header); | |
509 | ||
510 | ftr_header = RIO_GET_BLOCK_ID(ftr_header); | |
511 | switch (ftr_header) { | |
512 | ||
513 | case RIO_EFB_SER_EP_ID_V13P: | |
514 | case RIO_EFB_SER_EP_REC_ID_V13P: | |
515 | case RIO_EFB_SER_EP_FREE_ID_V13P: | |
516 | case RIO_EFB_SER_EP_ID: | |
517 | case RIO_EFB_SER_EP_REC_ID: | |
518 | case RIO_EFB_SER_EP_FREE_ID: | |
519 | case RIO_EFB_SER_EP_FREC_ID: | |
520 | ||
521 | return ext_ftr_ptr; | |
522 | ||
523 | default: | |
524 | break; | |
525 | } | |
526 | ||
527 | ext_ftr_ptr = rio_mport_get_efb(port, local, destid, | |
528 | hopcount, ext_ftr_ptr); | |
529 | } | |
530 | ||
531 | return ext_ftr_ptr; | |
532 | } | |
a11650e1 | 533 | EXPORT_SYMBOL_GPL(rio_mport_get_physefb); |
e5cabeb3 AB |
534 | |
535 | /** | |
536 | * rio_get_comptag - Begin or continue searching for a RIO device by component tag | |
97ef6f74 | 537 | * @comp_tag: RIO component tag to match |
e5cabeb3 AB |
538 | * @from: Previous RIO device found in search, or %NULL for new search |
539 | * | |
540 | * Iterates through the list of known RIO devices. If a RIO device is | |
541 | * found with a matching @comp_tag, a pointer to its device | |
542 | * structure is returned. Otherwise, %NULL is returned. A new search | |
543 | * is initiated by passing %NULL to the @from argument. Otherwise, if | |
544 | * @from is not %NULL, searches continue from next device on the global | |
545 | * list. | |
546 | */ | |
af84ca38 | 547 | struct rio_dev *rio_get_comptag(u32 comp_tag, struct rio_dev *from) |
e5cabeb3 AB |
548 | { |
549 | struct list_head *n; | |
550 | struct rio_dev *rdev; | |
551 | ||
e5cabeb3 AB |
552 | spin_lock(&rio_global_list_lock); |
553 | n = from ? from->global_list.next : rio_devices.next; | |
554 | ||
555 | while (n && (n != &rio_devices)) { | |
556 | rdev = rio_dev_g(n); | |
557 | if (rdev->comp_tag == comp_tag) | |
558 | goto exit; | |
559 | n = n->next; | |
560 | } | |
561 | rdev = NULL; | |
562 | exit: | |
563 | spin_unlock(&rio_global_list_lock); | |
564 | return rdev; | |
565 | } | |
a11650e1 | 566 | EXPORT_SYMBOL_GPL(rio_get_comptag); |
e5cabeb3 AB |
567 | |
568 | /** | |
569 | * rio_set_port_lockout - Sets/clears LOCKOUT bit (RIO EM 1.3) for a switch port. | |
570 | * @rdev: Pointer to RIO device control structure | |
571 | * @pnum: Switch port number to set LOCKOUT bit | |
572 | * @lock: Operation : set (=1) or clear (=0) | |
573 | */ | |
574 | int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock) | |
575 | { | |
e5cabeb3 AB |
576 | u32 regval; |
577 | ||
a93192a5 | 578 | rio_read_config_32(rdev, |
e5cabeb3 AB |
579 | rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum), |
580 | ®val); | |
581 | if (lock) | |
582 | regval |= RIO_PORT_N_CTL_LOCKOUT; | |
583 | else | |
584 | regval &= ~RIO_PORT_N_CTL_LOCKOUT; | |
585 | ||
a93192a5 | 586 | rio_write_config_32(rdev, |
e5cabeb3 AB |
587 | rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum), |
588 | regval); | |
589 | return 0; | |
590 | } | |
a11650e1 AB |
591 | EXPORT_SYMBOL_GPL(rio_set_port_lockout); |
592 | ||
a11650e1 AB |
593 | /** |
594 | * rio_enable_rx_tx_port - enable input receiver and output transmitter of | |
595 | * given port | |
596 | * @port: Master port associated with the RIO network | |
597 | * @local: local=1 select local port otherwise a far device is reached | |
598 | * @destid: Destination ID of the device to check host bit | |
599 | * @hopcount: Number of hops to reach the target | |
600 | * @port_num: Port (-number on switch) to enable on a far end device | |
601 | * | |
602 | * Returns 0 or 1 from on General Control Command and Status Register | |
603 | * (EXT_PTR+0x3C) | |
604 | */ | |
605 | int rio_enable_rx_tx_port(struct rio_mport *port, | |
606 | int local, u16 destid, | |
607 | u8 hopcount, u8 port_num) | |
608 | { | |
609 | #ifdef CONFIG_RAPIDIO_ENABLE_RX_TX_PORTS | |
610 | u32 regval; | |
611 | u32 ext_ftr_ptr; | |
612 | ||
613 | /* | |
614 | * enable rx input tx output port | |
615 | */ | |
616 | pr_debug("rio_enable_rx_tx_port(local = %d, destid = %d, hopcount = " | |
617 | "%d, port_num = %d)\n", local, destid, hopcount, port_num); | |
618 | ||
619 | ext_ftr_ptr = rio_mport_get_physefb(port, local, destid, hopcount); | |
620 | ||
621 | if (local) { | |
622 | rio_local_read_config_32(port, ext_ftr_ptr + | |
623 | RIO_PORT_N_CTL_CSR(0), | |
624 | ®val); | |
625 | } else { | |
626 | if (rio_mport_read_config_32(port, destid, hopcount, | |
627 | ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), ®val) < 0) | |
628 | return -EIO; | |
629 | } | |
630 | ||
631 | if (regval & RIO_PORT_N_CTL_P_TYP_SER) { | |
632 | /* serial */ | |
633 | regval = regval | RIO_PORT_N_CTL_EN_RX_SER | |
634 | | RIO_PORT_N_CTL_EN_TX_SER; | |
635 | } else { | |
636 | /* parallel */ | |
637 | regval = regval | RIO_PORT_N_CTL_EN_RX_PAR | |
638 | | RIO_PORT_N_CTL_EN_TX_PAR; | |
639 | } | |
640 | ||
641 | if (local) { | |
642 | rio_local_write_config_32(port, ext_ftr_ptr + | |
643 | RIO_PORT_N_CTL_CSR(0), regval); | |
644 | } else { | |
645 | if (rio_mport_write_config_32(port, destid, hopcount, | |
646 | ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), regval) < 0) | |
647 | return -EIO; | |
648 | } | |
649 | #endif | |
650 | return 0; | |
651 | } | |
652 | EXPORT_SYMBOL_GPL(rio_enable_rx_tx_port); | |
653 | ||
e5cabeb3 | 654 | |
6429cd49 AB |
655 | /** |
656 | * rio_chk_dev_route - Validate route to the specified device. | |
657 | * @rdev: RIO device failed to respond | |
658 | * @nrdev: Last active device on the route to rdev | |
659 | * @npnum: nrdev's port number on the route to rdev | |
660 | * | |
661 | * Follows a route to the specified RIO device to determine the last available | |
662 | * device (and corresponding RIO port) on the route. | |
663 | */ | |
664 | static int | |
665 | rio_chk_dev_route(struct rio_dev *rdev, struct rio_dev **nrdev, int *npnum) | |
666 | { | |
667 | u32 result; | |
a93192a5 | 668 | int p_port, rc = -EIO; |
6429cd49 AB |
669 | struct rio_dev *prev = NULL; |
670 | ||
671 | /* Find switch with failed RIO link */ | |
672 | while (rdev->prev && (rdev->prev->pef & RIO_PEF_SWITCH)) { | |
673 | if (!rio_read_config_32(rdev->prev, RIO_DEV_ID_CAR, &result)) { | |
674 | prev = rdev->prev; | |
675 | break; | |
676 | } | |
677 | rdev = rdev->prev; | |
678 | } | |
679 | ||
680 | if (prev == NULL) | |
681 | goto err_out; | |
682 | ||
a93192a5 | 683 | p_port = prev->rswitch->route_table[rdev->destid]; |
6429cd49 | 684 | |
af84ca38 | 685 | if (p_port != RIO_INVALID_ROUTE) { |
6429cd49 AB |
686 | pr_debug("RIO: link failed on [%s]-P%d\n", |
687 | rio_name(prev), p_port); | |
688 | *nrdev = prev; | |
689 | *npnum = p_port; | |
690 | rc = 0; | |
691 | } else | |
af84ca38 | 692 | pr_debug("RIO: failed to trace route to %s\n", rio_name(rdev)); |
6429cd49 AB |
693 | err_out: |
694 | return rc; | |
695 | } | |
696 | ||
697 | /** | |
698 | * rio_mport_chk_dev_access - Validate access to the specified device. | |
699 | * @mport: Master port to send transactions | |
700 | * @destid: Device destination ID in network | |
701 | * @hopcount: Number of hops into the network | |
702 | */ | |
e274e0ed | 703 | int |
6429cd49 AB |
704 | rio_mport_chk_dev_access(struct rio_mport *mport, u16 destid, u8 hopcount) |
705 | { | |
706 | int i = 0; | |
707 | u32 tmp; | |
708 | ||
709 | while (rio_mport_read_config_32(mport, destid, hopcount, | |
710 | RIO_DEV_ID_CAR, &tmp)) { | |
711 | i++; | |
712 | if (i == RIO_MAX_CHK_RETRY) | |
713 | return -EIO; | |
714 | mdelay(1); | |
715 | } | |
716 | ||
717 | return 0; | |
718 | } | |
a11650e1 | 719 | EXPORT_SYMBOL_GPL(rio_mport_chk_dev_access); |
6429cd49 AB |
720 | |
721 | /** | |
722 | * rio_chk_dev_access - Validate access to the specified device. | |
723 | * @rdev: Pointer to RIO device control structure | |
724 | */ | |
725 | static int rio_chk_dev_access(struct rio_dev *rdev) | |
726 | { | |
a93192a5 AB |
727 | return rio_mport_chk_dev_access(rdev->net->hport, |
728 | rdev->destid, rdev->hopcount); | |
6429cd49 AB |
729 | } |
730 | ||
dd5648c9 AB |
731 | /** |
732 | * rio_get_input_status - Sends a Link-Request/Input-Status control symbol and | |
733 | * returns link-response (if requested). | |
734 | * @rdev: RIO devive to issue Input-status command | |
735 | * @pnum: Device port number to issue the command | |
736 | * @lnkresp: Response from a link partner | |
737 | */ | |
738 | static int | |
739 | rio_get_input_status(struct rio_dev *rdev, int pnum, u32 *lnkresp) | |
740 | { | |
dd5648c9 AB |
741 | u32 regval; |
742 | int checkcount; | |
743 | ||
744 | if (lnkresp) { | |
745 | /* Read from link maintenance response register | |
746 | * to clear valid bit */ | |
a93192a5 | 747 | rio_read_config_32(rdev, |
dd5648c9 AB |
748 | rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum), |
749 | ®val); | |
750 | udelay(50); | |
751 | } | |
752 | ||
753 | /* Issue Input-status command */ | |
a93192a5 | 754 | rio_write_config_32(rdev, |
dd5648c9 AB |
755 | rdev->phys_efptr + RIO_PORT_N_MNT_REQ_CSR(pnum), |
756 | RIO_MNT_REQ_CMD_IS); | |
757 | ||
758 | /* Exit if the response is not expected */ | |
759 | if (lnkresp == NULL) | |
760 | return 0; | |
761 | ||
762 | checkcount = 3; | |
763 | while (checkcount--) { | |
764 | udelay(50); | |
a93192a5 | 765 | rio_read_config_32(rdev, |
dd5648c9 AB |
766 | rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum), |
767 | ®val); | |
768 | if (regval & RIO_PORT_N_MNT_RSP_RVAL) { | |
769 | *lnkresp = regval; | |
770 | return 0; | |
771 | } | |
772 | } | |
773 | ||
774 | return -EIO; | |
775 | } | |
776 | ||
777 | /** | |
778 | * rio_clr_err_stopped - Clears port Error-stopped states. | |
779 | * @rdev: Pointer to RIO device control structure | |
780 | * @pnum: Switch port number to clear errors | |
781 | * @err_status: port error status (if 0 reads register from device) | |
782 | */ | |
783 | static int rio_clr_err_stopped(struct rio_dev *rdev, u32 pnum, u32 err_status) | |
784 | { | |
dd5648c9 AB |
785 | struct rio_dev *nextdev = rdev->rswitch->nextdev[pnum]; |
786 | u32 regval; | |
787 | u32 far_ackid, far_linkstat, near_ackid; | |
788 | ||
789 | if (err_status == 0) | |
a93192a5 | 790 | rio_read_config_32(rdev, |
dd5648c9 AB |
791 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), |
792 | &err_status); | |
793 | ||
794 | if (err_status & RIO_PORT_N_ERR_STS_PW_OUT_ES) { | |
795 | pr_debug("RIO_EM: servicing Output Error-Stopped state\n"); | |
796 | /* | |
797 | * Send a Link-Request/Input-Status control symbol | |
798 | */ | |
799 | if (rio_get_input_status(rdev, pnum, ®val)) { | |
800 | pr_debug("RIO_EM: Input-status response timeout\n"); | |
801 | goto rd_err; | |
802 | } | |
803 | ||
804 | pr_debug("RIO_EM: SP%d Input-status response=0x%08x\n", | |
805 | pnum, regval); | |
806 | far_ackid = (regval & RIO_PORT_N_MNT_RSP_ASTAT) >> 5; | |
807 | far_linkstat = regval & RIO_PORT_N_MNT_RSP_LSTAT; | |
a93192a5 | 808 | rio_read_config_32(rdev, |
dd5648c9 AB |
809 | rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum), |
810 | ®val); | |
811 | pr_debug("RIO_EM: SP%d_ACK_STS_CSR=0x%08x\n", pnum, regval); | |
812 | near_ackid = (regval & RIO_PORT_N_ACK_INBOUND) >> 24; | |
813 | pr_debug("RIO_EM: SP%d far_ackID=0x%02x far_linkstat=0x%02x" \ | |
814 | " near_ackID=0x%02x\n", | |
815 | pnum, far_ackid, far_linkstat, near_ackid); | |
816 | ||
817 | /* | |
818 | * If required, synchronize ackIDs of near and | |
819 | * far sides. | |
820 | */ | |
821 | if ((far_ackid != ((regval & RIO_PORT_N_ACK_OUTSTAND) >> 8)) || | |
822 | (far_ackid != (regval & RIO_PORT_N_ACK_OUTBOUND))) { | |
823 | /* Align near outstanding/outbound ackIDs with | |
824 | * far inbound. | |
825 | */ | |
a93192a5 AB |
826 | rio_write_config_32(rdev, |
827 | rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum), | |
dd5648c9 AB |
828 | (near_ackid << 24) | |
829 | (far_ackid << 8) | far_ackid); | |
830 | /* Align far outstanding/outbound ackIDs with | |
831 | * near inbound. | |
832 | */ | |
833 | far_ackid++; | |
834 | if (nextdev) | |
835 | rio_write_config_32(nextdev, | |
836 | nextdev->phys_efptr + | |
837 | RIO_PORT_N_ACK_STS_CSR(RIO_GET_PORT_NUM(nextdev->swpinfo)), | |
838 | (far_ackid << 24) | | |
839 | (near_ackid << 8) | near_ackid); | |
840 | else | |
841 | pr_debug("RIO_EM: Invalid nextdev pointer (NULL)\n"); | |
842 | } | |
843 | rd_err: | |
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 | if ((err_status & RIO_PORT_N_ERR_STS_PW_INP_ES) && nextdev) { | |
851 | pr_debug("RIO_EM: servicing Input Error-Stopped state\n"); | |
852 | rio_get_input_status(nextdev, | |
853 | RIO_GET_PORT_NUM(nextdev->swpinfo), NULL); | |
854 | udelay(50); | |
855 | ||
a93192a5 | 856 | rio_read_config_32(rdev, |
dd5648c9 AB |
857 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), |
858 | &err_status); | |
859 | pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status); | |
860 | } | |
861 | ||
862 | return (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES | | |
863 | RIO_PORT_N_ERR_STS_PW_INP_ES)) ? 1 : 0; | |
864 | } | |
865 | ||
e5cabeb3 AB |
866 | /** |
867 | * rio_inb_pwrite_handler - process inbound port-write message | |
868 | * @pw_msg: pointer to inbound port-write message | |
869 | * | |
870 | * Processes an inbound port-write message. Returns 0 if the request | |
871 | * has been satisfied. | |
872 | */ | |
873 | int rio_inb_pwrite_handler(union rio_pw_msg *pw_msg) | |
874 | { | |
875 | struct rio_dev *rdev; | |
dd5648c9 | 876 | u32 err_status, em_perrdet, em_ltlerrdet; |
e5cabeb3 AB |
877 | int rc, portnum; |
878 | ||
e6536927 | 879 | rdev = rio_get_comptag((pw_msg->em.comptag & RIO_CTAG_UDEVID), NULL); |
e5cabeb3 | 880 | if (rdev == NULL) { |
6429cd49 AB |
881 | /* Device removed or enumeration error */ |
882 | pr_debug("RIO: %s No matching device for CTag 0x%08x\n", | |
e5cabeb3 AB |
883 | __func__, pw_msg->em.comptag); |
884 | return -EIO; | |
885 | } | |
886 | ||
887 | pr_debug("RIO: Port-Write message from %s\n", rio_name(rdev)); | |
888 | ||
889 | #ifdef DEBUG_PW | |
890 | { | |
891 | u32 i; | |
892 | for (i = 0; i < RIO_PW_MSG_SIZE/sizeof(u32);) { | |
dd5648c9 | 893 | pr_debug("0x%02x: %08x %08x %08x %08x\n", |
e5cabeb3 AB |
894 | i*4, pw_msg->raw[i], pw_msg->raw[i + 1], |
895 | pw_msg->raw[i + 2], pw_msg->raw[i + 3]); | |
896 | i += 4; | |
897 | } | |
e5cabeb3 AB |
898 | } |
899 | #endif | |
900 | ||
901 | /* Call an external service function (if such is registered | |
902 | * for this device). This may be the service for endpoints that send | |
903 | * device-specific port-write messages. End-point messages expected | |
904 | * to be handled completely by EP specific device driver. | |
905 | * For switches rc==0 signals that no standard processing required. | |
906 | */ | |
907 | if (rdev->pwcback != NULL) { | |
908 | rc = rdev->pwcback(rdev, pw_msg, 0); | |
909 | if (rc == 0) | |
910 | return 0; | |
911 | } | |
912 | ||
6429cd49 AB |
913 | portnum = pw_msg->em.is_port & 0xFF; |
914 | ||
915 | /* Check if device and route to it are functional: | |
916 | * Sometimes devices may send PW message(s) just before being | |
917 | * powered down (or link being lost). | |
918 | */ | |
919 | if (rio_chk_dev_access(rdev)) { | |
920 | pr_debug("RIO: device access failed - get link partner\n"); | |
921 | /* Scan route to the device and identify failed link. | |
922 | * This will replace device and port reported in PW message. | |
923 | * PW message should not be used after this point. | |
924 | */ | |
925 | if (rio_chk_dev_route(rdev, &rdev, &portnum)) { | |
926 | pr_err("RIO: Route trace for %s failed\n", | |
927 | rio_name(rdev)); | |
928 | return -EIO; | |
929 | } | |
930 | pw_msg = NULL; | |
931 | } | |
932 | ||
e5cabeb3 AB |
933 | /* For End-point devices processing stops here */ |
934 | if (!(rdev->pef & RIO_PEF_SWITCH)) | |
935 | return 0; | |
936 | ||
937 | if (rdev->phys_efptr == 0) { | |
938 | pr_err("RIO_PW: Bad switch initialization for %s\n", | |
939 | rio_name(rdev)); | |
940 | return 0; | |
941 | } | |
942 | ||
e5cabeb3 AB |
943 | /* |
944 | * Process the port-write notification from switch | |
945 | */ | |
2ec3ba69 AB |
946 | if (rdev->rswitch->ops && rdev->rswitch->ops->em_handle) |
947 | rdev->rswitch->ops->em_handle(rdev, portnum); | |
e5cabeb3 | 948 | |
a93192a5 | 949 | rio_read_config_32(rdev, |
e5cabeb3 AB |
950 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), |
951 | &err_status); | |
952 | pr_debug("RIO_PW: SP%d_ERR_STS_CSR=0x%08x\n", portnum, err_status); | |
953 | ||
dd5648c9 | 954 | if (err_status & RIO_PORT_N_ERR_STS_PORT_OK) { |
e5cabeb3 | 955 | |
dd5648c9 AB |
956 | if (!(rdev->rswitch->port_ok & (1 << portnum))) { |
957 | rdev->rswitch->port_ok |= (1 << portnum); | |
958 | rio_set_port_lockout(rdev, portnum, 0); | |
959 | /* Schedule Insertion Service */ | |
960 | pr_debug("RIO_PW: Device Insertion on [%s]-P%d\n", | |
961 | rio_name(rdev), portnum); | |
962 | } | |
e5cabeb3 | 963 | |
dd5648c9 AB |
964 | /* Clear error-stopped states (if reported). |
965 | * Depending on the link partner state, two attempts | |
966 | * may be needed for successful recovery. | |
967 | */ | |
968 | if (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES | | |
969 | RIO_PORT_N_ERR_STS_PW_INP_ES)) { | |
970 | if (rio_clr_err_stopped(rdev, portnum, err_status)) | |
971 | rio_clr_err_stopped(rdev, portnum, 0); | |
972 | } | |
973 | } else { /* if (err_status & RIO_PORT_N_ERR_STS_PORT_UNINIT) */ | |
e5cabeb3 | 974 | |
dd5648c9 | 975 | if (rdev->rswitch->port_ok & (1 << portnum)) { |
e5cabeb3 AB |
976 | rdev->rswitch->port_ok &= ~(1 << portnum); |
977 | rio_set_port_lockout(rdev, portnum, 1); | |
978 | ||
a93192a5 | 979 | rio_write_config_32(rdev, |
e5cabeb3 AB |
980 | rdev->phys_efptr + |
981 | RIO_PORT_N_ACK_STS_CSR(portnum), | |
982 | RIO_PORT_N_ACK_CLEAR); | |
983 | ||
984 | /* Schedule Extraction Service */ | |
985 | pr_debug("RIO_PW: Device Extraction on [%s]-P%d\n", | |
986 | rio_name(rdev), portnum); | |
987 | } | |
dd5648c9 | 988 | } |
e5cabeb3 | 989 | |
a93192a5 | 990 | rio_read_config_32(rdev, |
dd5648c9 AB |
991 | rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), &em_perrdet); |
992 | if (em_perrdet) { | |
993 | pr_debug("RIO_PW: RIO_EM_P%d_ERR_DETECT=0x%08x\n", | |
994 | portnum, em_perrdet); | |
995 | /* Clear EM Port N Error Detect CSR */ | |
a93192a5 | 996 | rio_write_config_32(rdev, |
dd5648c9 AB |
997 | rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), 0); |
998 | } | |
999 | ||
a93192a5 | 1000 | rio_read_config_32(rdev, |
dd5648c9 AB |
1001 | rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, &em_ltlerrdet); |
1002 | if (em_ltlerrdet) { | |
1003 | pr_debug("RIO_PW: RIO_EM_LTL_ERR_DETECT=0x%08x\n", | |
1004 | em_ltlerrdet); | |
1005 | /* Clear EM L/T Layer Error Detect CSR */ | |
a93192a5 | 1006 | rio_write_config_32(rdev, |
dd5648c9 | 1007 | rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, 0); |
e5cabeb3 AB |
1008 | } |
1009 | ||
388c45cc | 1010 | /* Clear remaining error bits and Port-Write Pending bit */ |
a93192a5 | 1011 | rio_write_config_32(rdev, |
dd5648c9 | 1012 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), |
388c45cc | 1013 | err_status); |
e5cabeb3 AB |
1014 | |
1015 | return 0; | |
1016 | } | |
1017 | EXPORT_SYMBOL_GPL(rio_inb_pwrite_handler); | |
1018 | ||
1019 | /** | |
1020 | * rio_mport_get_efb - get pointer to next extended features block | |
1021 | * @port: Master port to issue transaction | |
1022 | * @local: Indicate a local master port or remote device access | |
1023 | * @destid: Destination ID of the device | |
1024 | * @hopcount: Number of switch hops to the device | |
1025 | * @from: Offset of current Extended Feature block header (if 0 starts | |
1026 | * from ExtFeaturePtr) | |
1027 | */ | |
1028 | u32 | |
1029 | rio_mport_get_efb(struct rio_mport *port, int local, u16 destid, | |
1030 | u8 hopcount, u32 from) | |
1031 | { | |
1032 | u32 reg_val; | |
1033 | ||
1034 | if (from == 0) { | |
1035 | if (local) | |
1036 | rio_local_read_config_32(port, RIO_ASM_INFO_CAR, | |
1037 | ®_val); | |
1038 | else | |
1039 | rio_mport_read_config_32(port, destid, hopcount, | |
1040 | RIO_ASM_INFO_CAR, ®_val); | |
1041 | return reg_val & RIO_EXT_FTR_PTR_MASK; | |
1042 | } else { | |
1043 | if (local) | |
1044 | rio_local_read_config_32(port, from, ®_val); | |
1045 | else | |
1046 | rio_mport_read_config_32(port, destid, hopcount, | |
1047 | from, ®_val); | |
1048 | return RIO_GET_BLOCK_ID(reg_val); | |
1049 | } | |
1050 | } | |
a11650e1 | 1051 | EXPORT_SYMBOL_GPL(rio_mport_get_efb); |
e5cabeb3 | 1052 | |
394b701c MP |
1053 | /** |
1054 | * rio_mport_get_feature - query for devices' extended features | |
1055 | * @port: Master port to issue transaction | |
1056 | * @local: Indicate a local master port or remote device access | |
1057 | * @destid: Destination ID of the device | |
1058 | * @hopcount: Number of switch hops to the device | |
1059 | * @ftr: Extended feature code | |
1060 | * | |
1061 | * Tell if a device supports a given RapidIO capability. | |
1062 | * Returns the offset of the requested extended feature | |
1063 | * block within the device's RIO configuration space or | |
1064 | * 0 in case the device does not support it. Possible | |
1065 | * values for @ftr: | |
1066 | * | |
1067 | * %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices | |
1068 | * | |
1069 | * %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices | |
1070 | * | |
1071 | * %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices | |
1072 | * | |
1073 | * %RIO_EFB_SER_EP_ID LP/Serial EP Devices | |
1074 | * | |
1075 | * %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices | |
1076 | * | |
1077 | * %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices | |
1078 | */ | |
1079 | u32 | |
1080 | rio_mport_get_feature(struct rio_mport * port, int local, u16 destid, | |
1081 | u8 hopcount, int ftr) | |
1082 | { | |
1083 | u32 asm_info, ext_ftr_ptr, ftr_header; | |
1084 | ||
1085 | if (local) | |
1086 | rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info); | |
1087 | else | |
1088 | rio_mport_read_config_32(port, destid, hopcount, | |
1089 | RIO_ASM_INFO_CAR, &asm_info); | |
1090 | ||
1091 | ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK; | |
1092 | ||
1093 | while (ext_ftr_ptr) { | |
1094 | if (local) | |
1095 | rio_local_read_config_32(port, ext_ftr_ptr, | |
1096 | &ftr_header); | |
1097 | else | |
1098 | rio_mport_read_config_32(port, destid, hopcount, | |
1099 | ext_ftr_ptr, &ftr_header); | |
1100 | if (RIO_GET_BLOCK_ID(ftr_header) == ftr) | |
1101 | return ext_ftr_ptr; | |
1102 | if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header))) | |
1103 | break; | |
1104 | } | |
1105 | ||
1106 | return 0; | |
1107 | } | |
a11650e1 | 1108 | EXPORT_SYMBOL_GPL(rio_mport_get_feature); |
394b701c MP |
1109 | |
1110 | /** | |
1111 | * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did | |
1112 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids | |
1113 | * @did: RIO did to match or %RIO_ANY_ID to match all dids | |
1114 | * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids | |
1115 | * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids | |
1116 | * @from: Previous RIO device found in search, or %NULL for new search | |
1117 | * | |
1118 | * Iterates through the list of known RIO devices. If a RIO device is | |
1119 | * found with a matching @vid, @did, @asm_vid, @asm_did, the reference | |
1120 | * count to the device is incrememted and a pointer to its device | |
1121 | * structure is returned. Otherwise, %NULL is returned. A new search | |
1122 | * is initiated by passing %NULL to the @from argument. Otherwise, if | |
1123 | * @from is not %NULL, searches continue from next device on the global | |
1124 | * list. The reference count for @from is always decremented if it is | |
1125 | * not %NULL. | |
1126 | */ | |
1127 | struct rio_dev *rio_get_asm(u16 vid, u16 did, | |
1128 | u16 asm_vid, u16 asm_did, struct rio_dev *from) | |
1129 | { | |
1130 | struct list_head *n; | |
1131 | struct rio_dev *rdev; | |
1132 | ||
1133 | WARN_ON(in_interrupt()); | |
1134 | spin_lock(&rio_global_list_lock); | |
1135 | n = from ? from->global_list.next : rio_devices.next; | |
1136 | ||
1137 | while (n && (n != &rio_devices)) { | |
1138 | rdev = rio_dev_g(n); | |
1139 | if ((vid == RIO_ANY_ID || rdev->vid == vid) && | |
1140 | (did == RIO_ANY_ID || rdev->did == did) && | |
1141 | (asm_vid == RIO_ANY_ID || rdev->asm_vid == asm_vid) && | |
1142 | (asm_did == RIO_ANY_ID || rdev->asm_did == asm_did)) | |
1143 | goto exit; | |
1144 | n = n->next; | |
1145 | } | |
1146 | rdev = NULL; | |
1147 | exit: | |
1148 | rio_dev_put(from); | |
1149 | rdev = rio_dev_get(rdev); | |
1150 | spin_unlock(&rio_global_list_lock); | |
1151 | return rdev; | |
1152 | } | |
1153 | ||
1154 | /** | |
1155 | * rio_get_device - Begin or continue searching for a RIO device by vid/did | |
1156 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids | |
1157 | * @did: RIO did to match or %RIO_ANY_ID to match all dids | |
1158 | * @from: Previous RIO device found in search, or %NULL for new search | |
1159 | * | |
1160 | * Iterates through the list of known RIO devices. If a RIO device is | |
1161 | * found with a matching @vid and @did, the reference count to the | |
1162 | * device is incrememted and a pointer to its device structure is returned. | |
1163 | * Otherwise, %NULL is returned. A new search is initiated by passing %NULL | |
1164 | * to the @from argument. Otherwise, if @from is not %NULL, searches | |
1165 | * continue from next device on the global list. The reference count for | |
1166 | * @from is always decremented if it is not %NULL. | |
1167 | */ | |
1168 | struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from) | |
1169 | { | |
1170 | return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from); | |
1171 | } | |
1172 | ||
07590ff0 AB |
1173 | /** |
1174 | * rio_std_route_add_entry - Add switch route table entry using standard | |
1175 | * registers defined in RIO specification rev.1.3 | |
1176 | * @mport: Master port to issue transaction | |
1177 | * @destid: Destination ID of the device | |
1178 | * @hopcount: Number of switch hops to the device | |
1179 | * @table: routing table ID (global or port-specific) | |
1180 | * @route_destid: destID entry in the RT | |
1181 | * @route_port: destination port for specified destID | |
1182 | */ | |
2ec3ba69 AB |
1183 | static int |
1184 | rio_std_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount, | |
1185 | u16 table, u16 route_destid, u8 route_port) | |
07590ff0 AB |
1186 | { |
1187 | if (table == RIO_GLOBAL_TABLE) { | |
1188 | rio_mport_write_config_32(mport, destid, hopcount, | |
1189 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, | |
1190 | (u32)route_destid); | |
1191 | rio_mport_write_config_32(mport, destid, hopcount, | |
1192 | RIO_STD_RTE_CONF_PORT_SEL_CSR, | |
1193 | (u32)route_port); | |
1194 | } | |
e5cabeb3 | 1195 | |
07590ff0 AB |
1196 | udelay(10); |
1197 | return 0; | |
1198 | } | |
1199 | ||
1200 | /** | |
1201 | * rio_std_route_get_entry - Read switch route table entry (port number) | |
638c5945 | 1202 | * associated with specified destID using standard registers defined in RIO |
07590ff0 AB |
1203 | * specification rev.1.3 |
1204 | * @mport: Master port to issue transaction | |
1205 | * @destid: Destination ID of the device | |
1206 | * @hopcount: Number of switch hops to the device | |
1207 | * @table: routing table ID (global or port-specific) | |
1208 | * @route_destid: destID entry in the RT | |
1209 | * @route_port: returned destination port for specified destID | |
1210 | */ | |
2ec3ba69 AB |
1211 | static int |
1212 | rio_std_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount, | |
1213 | u16 table, u16 route_destid, u8 *route_port) | |
07590ff0 AB |
1214 | { |
1215 | u32 result; | |
1216 | ||
1217 | if (table == RIO_GLOBAL_TABLE) { | |
1218 | rio_mport_write_config_32(mport, destid, hopcount, | |
1219 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid); | |
1220 | rio_mport_read_config_32(mport, destid, hopcount, | |
1221 | RIO_STD_RTE_CONF_PORT_SEL_CSR, &result); | |
1222 | ||
1223 | *route_port = (u8)result; | |
1224 | } | |
1225 | ||
1226 | return 0; | |
1227 | } | |
1228 | ||
1229 | /** | |
1230 | * rio_std_route_clr_table - Clear swotch route table using standard registers | |
1231 | * defined in RIO specification rev.1.3. | |
1232 | * @mport: Master port to issue transaction | |
07590ff0 AB |
1233 | * @destid: Destination ID of the device |
1234 | * @hopcount: Number of switch hops to the device | |
1235 | * @table: routing table ID (global or port-specific) | |
1236 | */ | |
2ec3ba69 AB |
1237 | static int |
1238 | rio_std_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount, | |
1239 | u16 table) | |
07590ff0 AB |
1240 | { |
1241 | u32 max_destid = 0xff; | |
1242 | u32 i, pef, id_inc = 1, ext_cfg = 0; | |
1243 | u32 port_sel = RIO_INVALID_ROUTE; | |
1244 | ||
1245 | if (table == RIO_GLOBAL_TABLE) { | |
1246 | rio_mport_read_config_32(mport, destid, hopcount, | |
1247 | RIO_PEF_CAR, &pef); | |
1248 | ||
1249 | if (mport->sys_size) { | |
1250 | rio_mport_read_config_32(mport, destid, hopcount, | |
1251 | RIO_SWITCH_RT_LIMIT, | |
1252 | &max_destid); | |
1253 | max_destid &= RIO_RT_MAX_DESTID; | |
1254 | } | |
1255 | ||
1256 | if (pef & RIO_PEF_EXT_RT) { | |
1257 | ext_cfg = 0x80000000; | |
1258 | id_inc = 4; | |
1259 | port_sel = (RIO_INVALID_ROUTE << 24) | | |
1260 | (RIO_INVALID_ROUTE << 16) | | |
1261 | (RIO_INVALID_ROUTE << 8) | | |
1262 | RIO_INVALID_ROUTE; | |
1263 | } | |
1264 | ||
1265 | for (i = 0; i <= max_destid;) { | |
1266 | rio_mport_write_config_32(mport, destid, hopcount, | |
1267 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, | |
1268 | ext_cfg | i); | |
1269 | rio_mport_write_config_32(mport, destid, hopcount, | |
1270 | RIO_STD_RTE_CONF_PORT_SEL_CSR, | |
1271 | port_sel); | |
1272 | i += id_inc; | |
1273 | } | |
1274 | } | |
1275 | ||
1276 | udelay(10); | |
1277 | return 0; | |
1278 | } | |
1279 | ||
2ec3ba69 AB |
1280 | /** |
1281 | * rio_lock_device - Acquires host device lock for specified device | |
1282 | * @port: Master port to send transaction | |
1283 | * @destid: Destination ID for device/switch | |
1284 | * @hopcount: Hopcount to reach switch | |
1285 | * @wait_ms: Max wait time in msec (0 = no timeout) | |
1286 | * | |
1287 | * Attepts to acquire host device lock for specified device | |
1288 | * Returns 0 if device lock acquired or EINVAL if timeout expires. | |
1289 | */ | |
1290 | int rio_lock_device(struct rio_mport *port, u16 destid, | |
1291 | u8 hopcount, int wait_ms) | |
1292 | { | |
1293 | u32 result; | |
1294 | int tcnt = 0; | |
1295 | ||
1296 | /* Attempt to acquire device lock */ | |
1297 | rio_mport_write_config_32(port, destid, hopcount, | |
1298 | RIO_HOST_DID_LOCK_CSR, port->host_deviceid); | |
1299 | rio_mport_read_config_32(port, destid, hopcount, | |
1300 | RIO_HOST_DID_LOCK_CSR, &result); | |
1301 | ||
1302 | while (result != port->host_deviceid) { | |
1303 | if (wait_ms != 0 && tcnt == wait_ms) { | |
1304 | pr_debug("RIO: timeout when locking device %x:%x\n", | |
1305 | destid, hopcount); | |
1306 | return -EINVAL; | |
1307 | } | |
1308 | ||
1309 | /* Delay a bit */ | |
1310 | mdelay(1); | |
1311 | tcnt++; | |
1312 | /* Try to acquire device lock again */ | |
1313 | rio_mport_write_config_32(port, destid, | |
1314 | hopcount, | |
1315 | RIO_HOST_DID_LOCK_CSR, | |
1316 | port->host_deviceid); | |
1317 | rio_mport_read_config_32(port, destid, | |
1318 | hopcount, | |
1319 | RIO_HOST_DID_LOCK_CSR, &result); | |
1320 | } | |
1321 | ||
1322 | return 0; | |
1323 | } | |
1324 | EXPORT_SYMBOL_GPL(rio_lock_device); | |
1325 | ||
1326 | /** | |
1327 | * rio_unlock_device - Releases host device lock for specified device | |
1328 | * @port: Master port to send transaction | |
1329 | * @destid: Destination ID for device/switch | |
1330 | * @hopcount: Hopcount to reach switch | |
1331 | * | |
1332 | * Returns 0 if device lock released or EINVAL if fails. | |
1333 | */ | |
1334 | int rio_unlock_device(struct rio_mport *port, u16 destid, u8 hopcount) | |
1335 | { | |
1336 | u32 result; | |
1337 | ||
1338 | /* Release device lock */ | |
1339 | rio_mport_write_config_32(port, destid, | |
1340 | hopcount, | |
1341 | RIO_HOST_DID_LOCK_CSR, | |
1342 | port->host_deviceid); | |
1343 | rio_mport_read_config_32(port, destid, hopcount, | |
1344 | RIO_HOST_DID_LOCK_CSR, &result); | |
1345 | if ((result & 0xffff) != 0xffff) { | |
1346 | pr_debug("RIO: badness when releasing device lock %x:%x\n", | |
1347 | destid, hopcount); | |
1348 | return -EINVAL; | |
1349 | } | |
1350 | ||
1351 | return 0; | |
1352 | } | |
1353 | EXPORT_SYMBOL_GPL(rio_unlock_device); | |
1354 | ||
1355 | /** | |
1356 | * rio_route_add_entry- Add a route entry to a switch routing table | |
1357 | * @rdev: RIO device | |
1358 | * @table: Routing table ID | |
1359 | * @route_destid: Destination ID to be routed | |
1360 | * @route_port: Port number to be routed | |
1361 | * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock) | |
1362 | * | |
1363 | * If available calls the switch specific add_entry() method to add a route | |
1364 | * entry into a switch routing table. Otherwise uses standard RT update method | |
1365 | * as defined by RapidIO specification. A specific routing table can be selected | |
1366 | * using the @table argument if a switch has per port routing tables or | |
1367 | * the standard (or global) table may be used by passing | |
1368 | * %RIO_GLOBAL_TABLE in @table. | |
1369 | * | |
1370 | * Returns %0 on success or %-EINVAL on failure. | |
1371 | */ | |
1372 | int rio_route_add_entry(struct rio_dev *rdev, | |
1373 | u16 table, u16 route_destid, u8 route_port, int lock) | |
1374 | { | |
1375 | int rc = -EINVAL; | |
1376 | struct rio_switch_ops *ops = rdev->rswitch->ops; | |
1377 | ||
1378 | if (lock) { | |
1379 | rc = rio_lock_device(rdev->net->hport, rdev->destid, | |
1380 | rdev->hopcount, 1000); | |
1381 | if (rc) | |
1382 | return rc; | |
1383 | } | |
1384 | ||
1385 | spin_lock(&rdev->rswitch->lock); | |
1386 | ||
1387 | if (ops == NULL || ops->add_entry == NULL) { | |
1388 | rc = rio_std_route_add_entry(rdev->net->hport, rdev->destid, | |
1389 | rdev->hopcount, table, | |
1390 | route_destid, route_port); | |
1391 | } else if (try_module_get(ops->owner)) { | |
1392 | rc = ops->add_entry(rdev->net->hport, rdev->destid, | |
1393 | rdev->hopcount, table, route_destid, | |
1394 | route_port); | |
1395 | module_put(ops->owner); | |
1396 | } | |
1397 | ||
1398 | spin_unlock(&rdev->rswitch->lock); | |
1399 | ||
1400 | if (lock) | |
1401 | rio_unlock_device(rdev->net->hport, rdev->destid, | |
1402 | rdev->hopcount); | |
1403 | ||
1404 | return rc; | |
1405 | } | |
1406 | EXPORT_SYMBOL_GPL(rio_route_add_entry); | |
1407 | ||
1408 | /** | |
1409 | * rio_route_get_entry- Read an entry from a switch routing table | |
1410 | * @rdev: RIO device | |
1411 | * @table: Routing table ID | |
1412 | * @route_destid: Destination ID to be routed | |
1413 | * @route_port: Pointer to read port number into | |
1414 | * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock) | |
1415 | * | |
1416 | * If available calls the switch specific get_entry() method to fetch a route | |
1417 | * entry from a switch routing table. Otherwise uses standard RT read method | |
1418 | * as defined by RapidIO specification. A specific routing table can be selected | |
1419 | * using the @table argument if a switch has per port routing tables or | |
1420 | * the standard (or global) table may be used by passing | |
1421 | * %RIO_GLOBAL_TABLE in @table. | |
1422 | * | |
1423 | * Returns %0 on success or %-EINVAL on failure. | |
1424 | */ | |
1425 | int rio_route_get_entry(struct rio_dev *rdev, u16 table, | |
1426 | u16 route_destid, u8 *route_port, int lock) | |
1427 | { | |
1428 | int rc = -EINVAL; | |
1429 | struct rio_switch_ops *ops = rdev->rswitch->ops; | |
1430 | ||
1431 | if (lock) { | |
1432 | rc = rio_lock_device(rdev->net->hport, rdev->destid, | |
1433 | rdev->hopcount, 1000); | |
1434 | if (rc) | |
1435 | return rc; | |
1436 | } | |
1437 | ||
1438 | spin_lock(&rdev->rswitch->lock); | |
1439 | ||
1440 | if (ops == NULL || ops->get_entry == NULL) { | |
1441 | rc = rio_std_route_get_entry(rdev->net->hport, rdev->destid, | |
1442 | rdev->hopcount, table, | |
1443 | route_destid, route_port); | |
1444 | } else if (try_module_get(ops->owner)) { | |
1445 | rc = ops->get_entry(rdev->net->hport, rdev->destid, | |
1446 | rdev->hopcount, table, route_destid, | |
1447 | route_port); | |
1448 | module_put(ops->owner); | |
1449 | } | |
1450 | ||
1451 | spin_unlock(&rdev->rswitch->lock); | |
1452 | ||
1453 | if (lock) | |
1454 | rio_unlock_device(rdev->net->hport, rdev->destid, | |
1455 | rdev->hopcount); | |
1456 | return rc; | |
1457 | } | |
1458 | EXPORT_SYMBOL_GPL(rio_route_get_entry); | |
1459 | ||
1460 | /** | |
1461 | * rio_route_clr_table - Clear a switch routing table | |
1462 | * @rdev: RIO device | |
1463 | * @table: Routing table ID | |
1464 | * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock) | |
1465 | * | |
1466 | * If available calls the switch specific clr_table() method to clear a switch | |
1467 | * routing table. Otherwise uses standard RT write method as defined by RapidIO | |
1468 | * specification. A specific routing table can be selected using the @table | |
1469 | * argument if a switch has per port routing tables or the standard (or global) | |
1470 | * table may be used by passing %RIO_GLOBAL_TABLE in @table. | |
1471 | * | |
1472 | * Returns %0 on success or %-EINVAL on failure. | |
1473 | */ | |
1474 | int rio_route_clr_table(struct rio_dev *rdev, u16 table, int lock) | |
1475 | { | |
1476 | int rc = -EINVAL; | |
1477 | struct rio_switch_ops *ops = rdev->rswitch->ops; | |
1478 | ||
1479 | if (lock) { | |
1480 | rc = rio_lock_device(rdev->net->hport, rdev->destid, | |
1481 | rdev->hopcount, 1000); | |
1482 | if (rc) | |
1483 | return rc; | |
1484 | } | |
1485 | ||
1486 | spin_lock(&rdev->rswitch->lock); | |
1487 | ||
1488 | if (ops == NULL || ops->clr_table == NULL) { | |
1489 | rc = rio_std_route_clr_table(rdev->net->hport, rdev->destid, | |
1490 | rdev->hopcount, table); | |
1491 | } else if (try_module_get(ops->owner)) { | |
1492 | rc = ops->clr_table(rdev->net->hport, rdev->destid, | |
1493 | rdev->hopcount, table); | |
1494 | ||
1495 | module_put(ops->owner); | |
1496 | } | |
1497 | ||
1498 | spin_unlock(&rdev->rswitch->lock); | |
1499 | ||
1500 | if (lock) | |
1501 | rio_unlock_device(rdev->net->hport, rdev->destid, | |
1502 | rdev->hopcount); | |
1503 | ||
1504 | return rc; | |
1505 | } | |
1506 | EXPORT_SYMBOL_GPL(rio_route_clr_table); | |
1507 | ||
e42d98eb AB |
1508 | #ifdef CONFIG_RAPIDIO_DMA_ENGINE |
1509 | ||
1510 | static bool rio_chan_filter(struct dma_chan *chan, void *arg) | |
1511 | { | |
4aff1ce7 | 1512 | struct rio_mport *mport = arg; |
e42d98eb AB |
1513 | |
1514 | /* Check that DMA device belongs to the right MPORT */ | |
4aff1ce7 | 1515 | return mport == container_of(chan->device, struct rio_mport, dma); |
e42d98eb AB |
1516 | } |
1517 | ||
1518 | /** | |
4aff1ce7 AB |
1519 | * rio_request_mport_dma - request RapidIO capable DMA channel associated |
1520 | * with specified local RapidIO mport device. | |
1521 | * @mport: RIO mport to perform DMA data transfers | |
e42d98eb AB |
1522 | * |
1523 | * Returns pointer to allocated DMA channel or NULL if failed. | |
1524 | */ | |
4aff1ce7 | 1525 | struct dma_chan *rio_request_mport_dma(struct rio_mport *mport) |
e42d98eb AB |
1526 | { |
1527 | dma_cap_mask_t mask; | |
e42d98eb AB |
1528 | |
1529 | dma_cap_zero(mask); | |
1530 | dma_cap_set(DMA_SLAVE, mask); | |
4aff1ce7 AB |
1531 | return dma_request_channel(mask, rio_chan_filter, mport); |
1532 | } | |
1533 | EXPORT_SYMBOL_GPL(rio_request_mport_dma); | |
e42d98eb | 1534 | |
4aff1ce7 AB |
1535 | /** |
1536 | * rio_request_dma - request RapidIO capable DMA channel that supports | |
1537 | * specified target RapidIO device. | |
1538 | * @rdev: RIO device associated with DMA transfer | |
1539 | * | |
1540 | * Returns pointer to allocated DMA channel or NULL if failed. | |
1541 | */ | |
1542 | struct dma_chan *rio_request_dma(struct rio_dev *rdev) | |
1543 | { | |
1544 | return rio_request_mport_dma(rdev->net->hport); | |
e42d98eb AB |
1545 | } |
1546 | EXPORT_SYMBOL_GPL(rio_request_dma); | |
1547 | ||
1548 | /** | |
1549 | * rio_release_dma - release specified DMA channel | |
1550 | * @dchan: DMA channel to release | |
1551 | */ | |
1552 | void rio_release_dma(struct dma_chan *dchan) | |
1553 | { | |
1554 | dma_release_channel(dchan); | |
1555 | } | |
1556 | EXPORT_SYMBOL_GPL(rio_release_dma); | |
1557 | ||
1558 | /** | |
4aff1ce7 | 1559 | * rio_dma_prep_xfer - RapidIO specific wrapper |
e42d98eb | 1560 | * for device_prep_slave_sg callback defined by DMAENGINE. |
e42d98eb | 1561 | * @dchan: DMA channel to configure |
4aff1ce7 | 1562 | * @destid: target RapidIO device destination ID |
e42d98eb AB |
1563 | * @data: RIO specific data descriptor |
1564 | * @direction: DMA data transfer direction (TO or FROM the device) | |
1565 | * @flags: dmaengine defined flags | |
1566 | * | |
1567 | * Initializes RapidIO capable DMA channel for the specified data transfer. | |
1568 | * Uses DMA channel private extension to pass information related to remote | |
1569 | * target RIO device. | |
1570 | * Returns pointer to DMA transaction descriptor or NULL if failed. | |
1571 | */ | |
4aff1ce7 AB |
1572 | struct dma_async_tx_descriptor *rio_dma_prep_xfer(struct dma_chan *dchan, |
1573 | u16 destid, struct rio_dma_data *data, | |
e42d98eb AB |
1574 | enum dma_transfer_direction direction, unsigned long flags) |
1575 | { | |
e42d98eb AB |
1576 | struct rio_dma_ext rio_ext; |
1577 | ||
1578 | if (dchan->device->device_prep_slave_sg == NULL) { | |
1579 | pr_err("%s: prep_rio_sg == NULL\n", __func__); | |
1580 | return NULL; | |
1581 | } | |
1582 | ||
4aff1ce7 | 1583 | rio_ext.destid = destid; |
e42d98eb AB |
1584 | rio_ext.rio_addr_u = data->rio_addr_u; |
1585 | rio_ext.rio_addr = data->rio_addr; | |
1586 | rio_ext.wr_type = data->wr_type; | |
1587 | ||
4aff1ce7 AB |
1588 | return dmaengine_prep_rio_sg(dchan, data->sg, data->sg_len, |
1589 | direction, flags, &rio_ext); | |
1590 | } | |
1591 | EXPORT_SYMBOL_GPL(rio_dma_prep_xfer); | |
e42d98eb | 1592 | |
4aff1ce7 AB |
1593 | /** |
1594 | * rio_dma_prep_slave_sg - RapidIO specific wrapper | |
1595 | * for device_prep_slave_sg callback defined by DMAENGINE. | |
1596 | * @rdev: RIO device control structure | |
1597 | * @dchan: DMA channel to configure | |
1598 | * @data: RIO specific data descriptor | |
1599 | * @direction: DMA data transfer direction (TO or FROM the device) | |
1600 | * @flags: dmaengine defined flags | |
1601 | * | |
1602 | * Initializes RapidIO capable DMA channel for the specified data transfer. | |
1603 | * Uses DMA channel private extension to pass information related to remote | |
1604 | * target RIO device. | |
1605 | * Returns pointer to DMA transaction descriptor or NULL if failed. | |
1606 | */ | |
1607 | struct dma_async_tx_descriptor *rio_dma_prep_slave_sg(struct rio_dev *rdev, | |
1608 | struct dma_chan *dchan, struct rio_dma_data *data, | |
1609 | enum dma_transfer_direction direction, unsigned long flags) | |
1610 | { | |
1611 | return rio_dma_prep_xfer(dchan, rdev->destid, data, direction, flags); | |
e42d98eb AB |
1612 | } |
1613 | EXPORT_SYMBOL_GPL(rio_dma_prep_slave_sg); | |
1614 | ||
1615 | #endif /* CONFIG_RAPIDIO_DMA_ENGINE */ | |
1616 | ||
bc8fcfea AB |
1617 | /** |
1618 | * rio_find_mport - find RIO mport by its ID | |
1619 | * @mport_id: number (ID) of mport device | |
1620 | * | |
1621 | * Given a RIO mport number, the desired mport is located | |
1622 | * in the global list of mports. If the mport is found, a pointer to its | |
1623 | * data structure is returned. If no mport is found, %NULL is returned. | |
1624 | */ | |
1625 | struct rio_mport *rio_find_mport(int mport_id) | |
1626 | { | |
1627 | struct rio_mport *port; | |
1628 | ||
1629 | mutex_lock(&rio_mport_list_lock); | |
1630 | list_for_each_entry(port, &rio_mports, node) { | |
1631 | if (port->id == mport_id) | |
1632 | goto found; | |
1633 | } | |
1634 | port = NULL; | |
1635 | found: | |
1636 | mutex_unlock(&rio_mport_list_lock); | |
1637 | ||
1638 | return port; | |
1639 | } | |
1640 | ||
a11650e1 AB |
1641 | /** |
1642 | * rio_register_scan - enumeration/discovery method registration interface | |
1643 | * @mport_id: mport device ID for which fabric scan routine has to be set | |
1644 | * (RIO_MPORT_ANY = set for all available mports) | |
9edbc30b AB |
1645 | * @scan_ops: enumeration/discovery operations structure |
1646 | * | |
1647 | * Registers enumeration/discovery operations with RapidIO subsystem and | |
1648 | * attaches it to the specified mport device (or all available mports | |
1649 | * if RIO_MPORT_ANY is specified). | |
a11650e1 | 1650 | * |
a11650e1 | 1651 | * Returns error if the mport already has an enumerator attached to it. |
9edbc30b | 1652 | * In case of RIO_MPORT_ANY skips mports with valid scan routines (no error). |
a11650e1 AB |
1653 | */ |
1654 | int rio_register_scan(int mport_id, struct rio_scan *scan_ops) | |
1655 | { | |
1656 | struct rio_mport *port; | |
9edbc30b AB |
1657 | struct rio_scan_node *scan; |
1658 | int rc = 0; | |
a11650e1 | 1659 | |
9edbc30b | 1660 | pr_debug("RIO: %s for mport_id=%d\n", __func__, mport_id); |
a11650e1 | 1661 | |
9edbc30b AB |
1662 | if ((mport_id != RIO_MPORT_ANY && mport_id >= RIO_MAX_MPORTS) || |
1663 | !scan_ops) | |
1664 | return -EINVAL; | |
a11650e1 | 1665 | |
9edbc30b AB |
1666 | mutex_lock(&rio_mport_list_lock); |
1667 | ||
1668 | /* | |
1669 | * Check if there is another enumerator already registered for | |
1670 | * the same mport ID (including RIO_MPORT_ANY). Multiple enumerators | |
1671 | * for the same mport ID are not supported. | |
1672 | */ | |
1673 | list_for_each_entry(scan, &rio_scans, node) { | |
1674 | if (scan->mport_id == mport_id) { | |
1675 | rc = -EBUSY; | |
1676 | goto err_out; | |
a11650e1 AB |
1677 | } |
1678 | } | |
9edbc30b AB |
1679 | |
1680 | /* | |
1681 | * Allocate and initialize new scan registration node. | |
1682 | */ | |
1683 | scan = kzalloc(sizeof(*scan), GFP_KERNEL); | |
1684 | if (!scan) { | |
1685 | rc = -ENOMEM; | |
1686 | goto err_out; | |
1687 | } | |
1688 | ||
1689 | scan->mport_id = mport_id; | |
1690 | scan->ops = scan_ops; | |
1691 | ||
1692 | /* | |
1693 | * Traverse the list of registered mports to attach this new scan. | |
1694 | * | |
1695 | * The new scan with matching mport ID overrides any previously attached | |
1696 | * scan assuming that old scan (if any) is the default one (based on the | |
1697 | * enumerator registration check above). | |
1698 | * If the new scan is the global one, it will be attached only to mports | |
1699 | * that do not have their own individual operations already attached. | |
1700 | */ | |
1701 | list_for_each_entry(port, &rio_mports, node) { | |
1702 | if (port->id == mport_id) { | |
1703 | port->nscan = scan_ops; | |
1704 | break; | |
1705 | } else if (mport_id == RIO_MPORT_ANY && !port->nscan) | |
1706 | port->nscan = scan_ops; | |
1707 | } | |
1708 | ||
1709 | list_add_tail(&scan->node, &rio_scans); | |
1710 | ||
1711 | err_out: | |
a11650e1 AB |
1712 | mutex_unlock(&rio_mport_list_lock); |
1713 | ||
1714 | return rc; | |
1715 | } | |
1716 | EXPORT_SYMBOL_GPL(rio_register_scan); | |
1717 | ||
1718 | /** | |
1719 | * rio_unregister_scan - removes enumeration/discovery method from mport | |
1720 | * @mport_id: mport device ID for which fabric scan routine has to be | |
9edbc30b AB |
1721 | * unregistered (RIO_MPORT_ANY = apply to all mports that use |
1722 | * the specified scan_ops) | |
1723 | * @scan_ops: enumeration/discovery operations structure | |
a11650e1 AB |
1724 | * |
1725 | * Removes enumeration or discovery method assigned to the specified mport | |
9edbc30b AB |
1726 | * device. If RIO_MPORT_ANY is specified, removes the specified operations from |
1727 | * all mports that have them attached. | |
a11650e1 | 1728 | */ |
9edbc30b | 1729 | int rio_unregister_scan(int mport_id, struct rio_scan *scan_ops) |
a11650e1 AB |
1730 | { |
1731 | struct rio_mport *port; | |
9edbc30b AB |
1732 | struct rio_scan_node *scan; |
1733 | ||
1734 | pr_debug("RIO: %s for mport_id=%d\n", __func__, mport_id); | |
1735 | ||
1736 | if (mport_id != RIO_MPORT_ANY && mport_id >= RIO_MAX_MPORTS) | |
1737 | return -EINVAL; | |
a11650e1 AB |
1738 | |
1739 | mutex_lock(&rio_mport_list_lock); | |
9edbc30b AB |
1740 | |
1741 | list_for_each_entry(port, &rio_mports, node) | |
1742 | if (port->id == mport_id || | |
1743 | (mport_id == RIO_MPORT_ANY && port->nscan == scan_ops)) | |
1744 | port->nscan = NULL; | |
1745 | ||
f93f3c4e | 1746 | list_for_each_entry(scan, &rio_scans, node) { |
9edbc30b AB |
1747 | if (scan->mport_id == mport_id) { |
1748 | list_del(&scan->node); | |
1749 | kfree(scan); | |
f93f3c4e | 1750 | break; |
a11650e1 | 1751 | } |
f93f3c4e | 1752 | } |
9edbc30b | 1753 | |
a11650e1 AB |
1754 | mutex_unlock(&rio_mport_list_lock); |
1755 | ||
1756 | return 0; | |
1757 | } | |
1758 | EXPORT_SYMBOL_GPL(rio_unregister_scan); | |
1759 | ||
9edbc30b AB |
1760 | /** |
1761 | * rio_mport_scan - execute enumeration/discovery on the specified mport | |
1762 | * @mport_id: number (ID) of mport device | |
1763 | */ | |
1764 | int rio_mport_scan(int mport_id) | |
1765 | { | |
1766 | struct rio_mport *port = NULL; | |
1767 | int rc; | |
1768 | ||
1769 | mutex_lock(&rio_mport_list_lock); | |
1770 | list_for_each_entry(port, &rio_mports, node) { | |
1771 | if (port->id == mport_id) | |
1772 | goto found; | |
1773 | } | |
1774 | mutex_unlock(&rio_mport_list_lock); | |
1775 | return -ENODEV; | |
1776 | found: | |
1777 | if (!port->nscan) { | |
1778 | mutex_unlock(&rio_mport_list_lock); | |
1779 | return -EINVAL; | |
1780 | } | |
1781 | ||
1782 | if (!try_module_get(port->nscan->owner)) { | |
1783 | mutex_unlock(&rio_mport_list_lock); | |
1784 | return -ENODEV; | |
1785 | } | |
1786 | ||
1787 | mutex_unlock(&rio_mport_list_lock); | |
1788 | ||
1789 | if (port->host_deviceid >= 0) | |
1790 | rc = port->nscan->enumerate(port, 0); | |
1791 | else | |
1792 | rc = port->nscan->discover(port, RIO_SCAN_ENUM_NO_WAIT); | |
1793 | ||
1794 | module_put(port->nscan->owner); | |
1795 | return rc; | |
1796 | } | |
1797 | ||
394b701c MP |
1798 | static void rio_fixup_device(struct rio_dev *dev) |
1799 | { | |
1800 | } | |
1801 | ||
305c891e | 1802 | static int rio_init(void) |
394b701c MP |
1803 | { |
1804 | struct rio_dev *dev = NULL; | |
1805 | ||
1806 | while ((dev = rio_get_device(RIO_ANY_ID, RIO_ANY_ID, dev)) != NULL) { | |
1807 | rio_fixup_device(dev); | |
1808 | } | |
1809 | return 0; | |
1810 | } | |
1811 | ||
005842ef AB |
1812 | static struct workqueue_struct *rio_wq; |
1813 | ||
1814 | struct rio_disc_work { | |
1815 | struct work_struct work; | |
1816 | struct rio_mport *mport; | |
1817 | }; | |
1818 | ||
305c891e | 1819 | static void disc_work_handler(struct work_struct *_work) |
005842ef AB |
1820 | { |
1821 | struct rio_disc_work *work; | |
1822 | ||
1823 | work = container_of(_work, struct rio_disc_work, work); | |
1824 | pr_debug("RIO: discovery work for mport %d %s\n", | |
1825 | work->mport->id, work->mport->name); | |
9edbc30b AB |
1826 | if (try_module_get(work->mport->nscan->owner)) { |
1827 | work->mport->nscan->discover(work->mport, 0); | |
1828 | module_put(work->mport->nscan->owner); | |
1829 | } | |
005842ef AB |
1830 | } |
1831 | ||
305c891e | 1832 | int rio_init_mports(void) |
394b701c | 1833 | { |
394b701c | 1834 | struct rio_mport *port; |
005842ef | 1835 | struct rio_disc_work *work; |
2574740d AB |
1836 | int n = 0; |
1837 | ||
1838 | if (!next_portid) | |
1839 | return -ENODEV; | |
394b701c | 1840 | |
2574740d AB |
1841 | /* |
1842 | * First, run enumerations and check if we need to perform discovery | |
1843 | * on any of the registered mports. | |
1844 | */ | |
a11650e1 | 1845 | mutex_lock(&rio_mport_list_lock); |
394b701c | 1846 | list_for_each_entry(port, &rio_mports, node) { |
a11650e1 | 1847 | if (port->host_deviceid >= 0) { |
9edbc30b | 1848 | if (port->nscan && try_module_get(port->nscan->owner)) { |
bc8fcfea | 1849 | port->nscan->enumerate(port, 0); |
9edbc30b AB |
1850 | module_put(port->nscan->owner); |
1851 | } | |
a11650e1 | 1852 | } else |
2574740d AB |
1853 | n++; |
1854 | } | |
a11650e1 | 1855 | mutex_unlock(&rio_mport_list_lock); |
2574740d AB |
1856 | |
1857 | if (!n) | |
1858 | goto no_disc; | |
1859 | ||
1860 | /* | |
1861 | * If we have mports that require discovery schedule a discovery work | |
1862 | * for each of them. If the code below fails to allocate needed | |
1863 | * resources, exit without error to keep results of enumeration | |
1864 | * process (if any). | |
9edbc30b | 1865 | * TODO: Implement restart of discovery process for all or |
2574740d AB |
1866 | * individual discovering mports. |
1867 | */ | |
1868 | rio_wq = alloc_workqueue("riodisc", 0, 0); | |
1869 | if (!rio_wq) { | |
1870 | pr_err("RIO: unable allocate rio_wq\n"); | |
1871 | goto no_disc; | |
005842ef AB |
1872 | } |
1873 | ||
2574740d AB |
1874 | work = kcalloc(n, sizeof *work, GFP_KERNEL); |
1875 | if (!work) { | |
1876 | pr_err("RIO: no memory for work struct\n"); | |
005842ef | 1877 | destroy_workqueue(rio_wq); |
2574740d | 1878 | goto no_disc; |
394b701c MP |
1879 | } |
1880 | ||
2574740d | 1881 | n = 0; |
a11650e1 | 1882 | mutex_lock(&rio_mport_list_lock); |
2574740d | 1883 | list_for_each_entry(port, &rio_mports, node) { |
a11650e1 | 1884 | if (port->host_deviceid < 0 && port->nscan) { |
2574740d AB |
1885 | work[n].mport = port; |
1886 | INIT_WORK(&work[n].work, disc_work_handler); | |
1887 | queue_work(rio_wq, &work[n].work); | |
1888 | n++; | |
1889 | } | |
1890 | } | |
1891 | ||
1892 | flush_workqueue(rio_wq); | |
9edbc30b | 1893 | mutex_unlock(&rio_mport_list_lock); |
2574740d AB |
1894 | pr_debug("RIO: destroy discovery workqueue\n"); |
1895 | destroy_workqueue(rio_wq); | |
1896 | kfree(work); | |
1897 | ||
1898 | no_disc: | |
2f809985 AB |
1899 | rio_init(); |
1900 | ||
c1256ebe | 1901 | return 0; |
394b701c MP |
1902 | } |
1903 | ||
569fccb6 AB |
1904 | static int rio_get_hdid(int index) |
1905 | { | |
fdf90abc | 1906 | if (ids_num == 0 || ids_num <= index || index >= RIO_MAX_MPORTS) |
569fccb6 AB |
1907 | return -1; |
1908 | ||
fdf90abc | 1909 | return hdid[index]; |
569fccb6 AB |
1910 | } |
1911 | ||
59f99965 | 1912 | int rio_register_mport(struct rio_mport *port) |
394b701c | 1913 | { |
9edbc30b | 1914 | struct rio_scan_node *scan = NULL; |
2aaf308b | 1915 | int res = 0; |
9edbc30b | 1916 | |
569fccb6 AB |
1917 | if (next_portid >= RIO_MAX_MPORTS) { |
1918 | pr_err("RIO: reached specified max number of mports\n"); | |
59f99965 | 1919 | return 1; |
569fccb6 AB |
1920 | } |
1921 | ||
1922 | port->id = next_portid++; | |
1923 | port->host_deviceid = rio_get_hdid(port->id); | |
a11650e1 | 1924 | port->nscan = NULL; |
9edbc30b | 1925 | |
2aaf308b AB |
1926 | dev_set_name(&port->dev, "rapidio%d", port->id); |
1927 | port->dev.class = &rio_mport_class; | |
1928 | ||
1929 | res = device_register(&port->dev); | |
1930 | if (res) | |
1931 | dev_err(&port->dev, "RIO: mport%d registration failed ERR=%d\n", | |
1932 | port->id, res); | |
1933 | else | |
1934 | dev_dbg(&port->dev, "RIO: mport%d registered\n", port->id); | |
1935 | ||
a11650e1 | 1936 | mutex_lock(&rio_mport_list_lock); |
394b701c | 1937 | list_add_tail(&port->node, &rio_mports); |
9edbc30b AB |
1938 | |
1939 | /* | |
1940 | * Check if there are any registered enumeration/discovery operations | |
1941 | * that have to be attached to the added mport. | |
1942 | */ | |
1943 | list_for_each_entry(scan, &rio_scans, node) { | |
1944 | if (port->id == scan->mport_id || | |
1945 | scan->mport_id == RIO_MPORT_ANY) { | |
1946 | port->nscan = scan->ops; | |
1947 | if (port->id == scan->mport_id) | |
1948 | break; | |
1949 | } | |
1950 | } | |
a11650e1 | 1951 | mutex_unlock(&rio_mport_list_lock); |
9edbc30b AB |
1952 | |
1953 | pr_debug("RIO: %s %s id=%d\n", __func__, port->name, port->id); | |
59f99965 | 1954 | return 0; |
394b701c | 1955 | } |
94d9bd45 | 1956 | EXPORT_SYMBOL_GPL(rio_register_mport); |
394b701c MP |
1957 | |
1958 | EXPORT_SYMBOL_GPL(rio_local_get_device_id); | |
1959 | EXPORT_SYMBOL_GPL(rio_get_device); | |
1960 | EXPORT_SYMBOL_GPL(rio_get_asm); | |
1961 | EXPORT_SYMBOL_GPL(rio_request_inb_dbell); | |
1962 | EXPORT_SYMBOL_GPL(rio_release_inb_dbell); | |
1963 | EXPORT_SYMBOL_GPL(rio_request_outb_dbell); | |
1964 | EXPORT_SYMBOL_GPL(rio_release_outb_dbell); | |
1965 | EXPORT_SYMBOL_GPL(rio_request_inb_mbox); | |
1966 | EXPORT_SYMBOL_GPL(rio_release_inb_mbox); | |
1967 | EXPORT_SYMBOL_GPL(rio_request_outb_mbox); | |
1968 | EXPORT_SYMBOL_GPL(rio_release_outb_mbox); | |
a11650e1 | 1969 | EXPORT_SYMBOL_GPL(rio_init_mports); |