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