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Commit | Line | Data |
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394b701c MP |
1 | /* |
2 | * RapidIO interconnect services | |
3 | * (RapidIO Interconnect Specification, http://www.rapidio.org) | |
4 | * | |
5 | * Copyright 2005 MontaVista Software, Inc. | |
6 | * Matt Porter <mporter@kernel.crashing.org> | |
7 | * | |
e5cabeb3 AB |
8 | * Copyright 2009 Integrated Device Technology, Inc. |
9 | * Alex Bounine <alexandre.bounine@idt.com> | |
10 | * - Added Port-Write/Error Management initialization and handling | |
11 | * | |
394b701c MP |
12 | * This program is free software; you can redistribute it and/or modify it |
13 | * under the terms of the GNU General Public License as published by the | |
14 | * Free Software Foundation; either version 2 of the License, or (at your | |
15 | * option) any later version. | |
16 | */ | |
17 | ||
394b701c MP |
18 | #include <linux/types.h> |
19 | #include <linux/kernel.h> | |
20 | ||
21 | #include <linux/delay.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/rio.h> | |
24 | #include <linux/rio_drv.h> | |
25 | #include <linux/rio_ids.h> | |
26 | #include <linux/rio_regs.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/spinlock.h> | |
de25968c | 29 | #include <linux/slab.h> |
5febf1cd | 30 | #include <linux/interrupt.h> |
394b701c MP |
31 | |
32 | #include "rio.h" | |
33 | ||
34 | static LIST_HEAD(rio_mports); | |
35 | ||
36 | /** | |
37 | * rio_local_get_device_id - Get the base/extended device id for a port | |
38 | * @port: RIO master port from which to get the deviceid | |
39 | * | |
40 | * Reads the base/extended device id from the local device | |
41 | * implementing the master port. Returns the 8/16-bit device | |
42 | * id. | |
43 | */ | |
44 | u16 rio_local_get_device_id(struct rio_mport *port) | |
45 | { | |
46 | u32 result; | |
47 | ||
48 | rio_local_read_config_32(port, RIO_DID_CSR, &result); | |
49 | ||
e0423236 | 50 | return (RIO_GET_DID(port->sys_size, result)); |
394b701c MP |
51 | } |
52 | ||
53 | /** | |
54 | * rio_request_inb_mbox - request inbound mailbox service | |
55 | * @mport: RIO master port from which to allocate the mailbox resource | |
6978bbc0 | 56 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
57 | * @mbox: Mailbox number to claim |
58 | * @entries: Number of entries in inbound mailbox queue | |
59 | * @minb: Callback to execute when inbound message is received | |
60 | * | |
61 | * Requests ownership of an inbound mailbox resource and binds | |
62 | * a callback function to the resource. Returns %0 on success. | |
63 | */ | |
64 | int rio_request_inb_mbox(struct rio_mport *mport, | |
6978bbc0 | 65 | void *dev_id, |
394b701c MP |
66 | int mbox, |
67 | int entries, | |
6978bbc0 | 68 | void (*minb) (struct rio_mport * mport, void *dev_id, int mbox, |
394b701c MP |
69 | int slot)) |
70 | { | |
71 | int rc = 0; | |
72 | ||
73 | struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); | |
74 | ||
75 | if (res) { | |
76 | rio_init_mbox_res(res, mbox, mbox); | |
77 | ||
78 | /* Make sure this mailbox isn't in use */ | |
79 | if ((rc = | |
80 | request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE], | |
81 | res)) < 0) { | |
82 | kfree(res); | |
83 | goto out; | |
84 | } | |
85 | ||
86 | mport->inb_msg[mbox].res = res; | |
87 | ||
88 | /* Hook the inbound message callback */ | |
89 | mport->inb_msg[mbox].mcback = minb; | |
90 | ||
6978bbc0 | 91 | rc = rio_open_inb_mbox(mport, dev_id, mbox, entries); |
394b701c MP |
92 | } else |
93 | rc = -ENOMEM; | |
94 | ||
95 | out: | |
96 | return rc; | |
97 | } | |
98 | ||
99 | /** | |
100 | * rio_release_inb_mbox - release inbound mailbox message service | |
101 | * @mport: RIO master port from which to release the mailbox resource | |
102 | * @mbox: Mailbox number to release | |
103 | * | |
104 | * Releases ownership of an inbound mailbox resource. Returns 0 | |
105 | * if the request has been satisfied. | |
106 | */ | |
107 | int rio_release_inb_mbox(struct rio_mport *mport, int mbox) | |
108 | { | |
109 | rio_close_inb_mbox(mport, mbox); | |
110 | ||
111 | /* Release the mailbox resource */ | |
112 | return release_resource(mport->inb_msg[mbox].res); | |
113 | } | |
114 | ||
115 | /** | |
116 | * rio_request_outb_mbox - request outbound mailbox service | |
117 | * @mport: RIO master port from which to allocate the mailbox resource | |
6978bbc0 | 118 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
119 | * @mbox: Mailbox number to claim |
120 | * @entries: Number of entries in outbound mailbox queue | |
121 | * @moutb: Callback to execute when outbound message is sent | |
122 | * | |
123 | * Requests ownership of an outbound mailbox resource and binds | |
124 | * a callback function to the resource. Returns 0 on success. | |
125 | */ | |
126 | int rio_request_outb_mbox(struct rio_mport *mport, | |
6978bbc0 | 127 | void *dev_id, |
394b701c MP |
128 | int mbox, |
129 | int entries, | |
6978bbc0 | 130 | void (*moutb) (struct rio_mport * mport, void *dev_id, int mbox, int slot)) |
394b701c MP |
131 | { |
132 | int rc = 0; | |
133 | ||
134 | struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); | |
135 | ||
136 | if (res) { | |
137 | rio_init_mbox_res(res, mbox, mbox); | |
138 | ||
139 | /* Make sure this outbound mailbox isn't in use */ | |
140 | if ((rc = | |
141 | request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE], | |
142 | res)) < 0) { | |
143 | kfree(res); | |
144 | goto out; | |
145 | } | |
146 | ||
147 | mport->outb_msg[mbox].res = res; | |
148 | ||
149 | /* Hook the inbound message callback */ | |
150 | mport->outb_msg[mbox].mcback = moutb; | |
151 | ||
6978bbc0 | 152 | rc = rio_open_outb_mbox(mport, dev_id, mbox, entries); |
394b701c MP |
153 | } else |
154 | rc = -ENOMEM; | |
155 | ||
156 | out: | |
157 | return rc; | |
158 | } | |
159 | ||
160 | /** | |
161 | * rio_release_outb_mbox - release outbound mailbox message service | |
162 | * @mport: RIO master port from which to release the mailbox resource | |
163 | * @mbox: Mailbox number to release | |
164 | * | |
165 | * Releases ownership of an inbound mailbox resource. Returns 0 | |
166 | * if the request has been satisfied. | |
167 | */ | |
168 | int rio_release_outb_mbox(struct rio_mport *mport, int mbox) | |
169 | { | |
170 | rio_close_outb_mbox(mport, mbox); | |
171 | ||
172 | /* Release the mailbox resource */ | |
173 | return release_resource(mport->outb_msg[mbox].res); | |
174 | } | |
175 | ||
176 | /** | |
177 | * rio_setup_inb_dbell - bind inbound doorbell callback | |
178 | * @mport: RIO master port to bind the doorbell callback | |
6978bbc0 | 179 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
180 | * @res: Doorbell message resource |
181 | * @dinb: Callback to execute when doorbell is received | |
182 | * | |
183 | * Adds a doorbell resource/callback pair into a port's | |
184 | * doorbell event list. Returns 0 if the request has been | |
185 | * satisfied. | |
186 | */ | |
187 | static int | |
6978bbc0 MP |
188 | rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res, |
189 | void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst, | |
394b701c MP |
190 | u16 info)) |
191 | { | |
192 | int rc = 0; | |
193 | struct rio_dbell *dbell; | |
194 | ||
195 | if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) { | |
196 | rc = -ENOMEM; | |
197 | goto out; | |
198 | } | |
199 | ||
200 | dbell->res = res; | |
201 | dbell->dinb = dinb; | |
6978bbc0 | 202 | dbell->dev_id = dev_id; |
394b701c MP |
203 | |
204 | list_add_tail(&dbell->node, &mport->dbells); | |
205 | ||
206 | out: | |
207 | return rc; | |
208 | } | |
209 | ||
210 | /** | |
211 | * rio_request_inb_dbell - request inbound doorbell message service | |
212 | * @mport: RIO master port from which to allocate the doorbell resource | |
6978bbc0 | 213 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
214 | * @start: Doorbell info range start |
215 | * @end: Doorbell info range end | |
216 | * @dinb: Callback to execute when doorbell is received | |
217 | * | |
218 | * Requests ownership of an inbound doorbell resource and binds | |
219 | * a callback function to the resource. Returns 0 if the request | |
220 | * has been satisfied. | |
221 | */ | |
222 | int rio_request_inb_dbell(struct rio_mport *mport, | |
6978bbc0 | 223 | void *dev_id, |
394b701c MP |
224 | u16 start, |
225 | u16 end, | |
6978bbc0 | 226 | void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, |
394b701c MP |
227 | u16 dst, u16 info)) |
228 | { | |
229 | int rc = 0; | |
230 | ||
231 | struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); | |
232 | ||
233 | if (res) { | |
234 | rio_init_dbell_res(res, start, end); | |
235 | ||
236 | /* Make sure these doorbells aren't in use */ | |
237 | if ((rc = | |
238 | request_resource(&mport->riores[RIO_DOORBELL_RESOURCE], | |
239 | res)) < 0) { | |
240 | kfree(res); | |
241 | goto out; | |
242 | } | |
243 | ||
244 | /* Hook the doorbell callback */ | |
6978bbc0 | 245 | rc = rio_setup_inb_dbell(mport, dev_id, res, dinb); |
394b701c MP |
246 | } else |
247 | rc = -ENOMEM; | |
248 | ||
249 | out: | |
250 | return rc; | |
251 | } | |
252 | ||
253 | /** | |
254 | * rio_release_inb_dbell - release inbound doorbell message service | |
255 | * @mport: RIO master port from which to release the doorbell resource | |
256 | * @start: Doorbell info range start | |
257 | * @end: Doorbell info range end | |
258 | * | |
259 | * Releases ownership of an inbound doorbell resource and removes | |
260 | * callback from the doorbell event list. Returns 0 if the request | |
261 | * has been satisfied. | |
262 | */ | |
263 | int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end) | |
264 | { | |
265 | int rc = 0, found = 0; | |
266 | struct rio_dbell *dbell; | |
267 | ||
268 | list_for_each_entry(dbell, &mport->dbells, node) { | |
269 | if ((dbell->res->start == start) && (dbell->res->end == end)) { | |
270 | found = 1; | |
271 | break; | |
272 | } | |
273 | } | |
274 | ||
275 | /* If we can't find an exact match, fail */ | |
276 | if (!found) { | |
277 | rc = -EINVAL; | |
278 | goto out; | |
279 | } | |
280 | ||
281 | /* Delete from list */ | |
282 | list_del(&dbell->node); | |
283 | ||
284 | /* Release the doorbell resource */ | |
285 | rc = release_resource(dbell->res); | |
286 | ||
287 | /* Free the doorbell event */ | |
288 | kfree(dbell); | |
289 | ||
290 | out: | |
291 | return rc; | |
292 | } | |
293 | ||
294 | /** | |
295 | * rio_request_outb_dbell - request outbound doorbell message range | |
296 | * @rdev: RIO device from which to allocate the doorbell resource | |
297 | * @start: Doorbell message range start | |
298 | * @end: Doorbell message range end | |
299 | * | |
300 | * Requests ownership of a doorbell message range. Returns a resource | |
301 | * if the request has been satisfied or %NULL on failure. | |
302 | */ | |
303 | struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start, | |
304 | u16 end) | |
305 | { | |
306 | struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); | |
307 | ||
308 | if (res) { | |
309 | rio_init_dbell_res(res, start, end); | |
310 | ||
311 | /* Make sure these doorbells aren't in use */ | |
312 | if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res) | |
313 | < 0) { | |
314 | kfree(res); | |
315 | res = NULL; | |
316 | } | |
317 | } | |
318 | ||
319 | return res; | |
320 | } | |
321 | ||
322 | /** | |
323 | * rio_release_outb_dbell - release outbound doorbell message range | |
324 | * @rdev: RIO device from which to release the doorbell resource | |
325 | * @res: Doorbell resource to be freed | |
326 | * | |
327 | * Releases ownership of a doorbell message range. Returns 0 if the | |
328 | * request has been satisfied. | |
329 | */ | |
330 | int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res) | |
331 | { | |
332 | int rc = release_resource(res); | |
333 | ||
334 | kfree(res); | |
335 | ||
336 | return rc; | |
337 | } | |
338 | ||
e5cabeb3 AB |
339 | /** |
340 | * rio_request_inb_pwrite - request inbound port-write message service | |
97ef6f74 | 341 | * @rdev: RIO device to which register inbound port-write callback routine |
e5cabeb3 AB |
342 | * @pwcback: Callback routine to execute when port-write is received |
343 | * | |
344 | * Binds a port-write callback function to the RapidIO device. | |
345 | * Returns 0 if the request has been satisfied. | |
346 | */ | |
347 | int rio_request_inb_pwrite(struct rio_dev *rdev, | |
348 | int (*pwcback)(struct rio_dev *rdev, union rio_pw_msg *msg, int step)) | |
349 | { | |
350 | int rc = 0; | |
351 | ||
352 | spin_lock(&rio_global_list_lock); | |
353 | if (rdev->pwcback != NULL) | |
354 | rc = -ENOMEM; | |
355 | else | |
356 | rdev->pwcback = pwcback; | |
357 | ||
358 | spin_unlock(&rio_global_list_lock); | |
359 | return rc; | |
360 | } | |
361 | EXPORT_SYMBOL_GPL(rio_request_inb_pwrite); | |
362 | ||
363 | /** | |
364 | * rio_release_inb_pwrite - release inbound port-write message service | |
365 | * @rdev: RIO device which registered for inbound port-write callback | |
366 | * | |
367 | * Removes callback from the rio_dev structure. Returns 0 if the request | |
368 | * has been satisfied. | |
369 | */ | |
370 | int rio_release_inb_pwrite(struct rio_dev *rdev) | |
371 | { | |
372 | int rc = -ENOMEM; | |
373 | ||
374 | spin_lock(&rio_global_list_lock); | |
375 | if (rdev->pwcback) { | |
376 | rdev->pwcback = NULL; | |
377 | rc = 0; | |
378 | } | |
379 | ||
380 | spin_unlock(&rio_global_list_lock); | |
381 | return rc; | |
382 | } | |
383 | EXPORT_SYMBOL_GPL(rio_release_inb_pwrite); | |
384 | ||
385 | /** | |
386 | * rio_mport_get_physefb - Helper function that returns register offset | |
387 | * for Physical Layer Extended Features Block. | |
97ef6f74 RD |
388 | * @port: Master port to issue transaction |
389 | * @local: Indicate a local master port or remote device access | |
390 | * @destid: Destination ID of the device | |
391 | * @hopcount: Number of switch hops to the device | |
e5cabeb3 AB |
392 | */ |
393 | u32 | |
394 | rio_mport_get_physefb(struct rio_mport *port, int local, | |
395 | u16 destid, u8 hopcount) | |
396 | { | |
397 | u32 ext_ftr_ptr; | |
398 | u32 ftr_header; | |
399 | ||
400 | ext_ftr_ptr = rio_mport_get_efb(port, local, destid, hopcount, 0); | |
401 | ||
402 | while (ext_ftr_ptr) { | |
403 | if (local) | |
404 | rio_local_read_config_32(port, ext_ftr_ptr, | |
405 | &ftr_header); | |
406 | else | |
407 | rio_mport_read_config_32(port, destid, hopcount, | |
408 | ext_ftr_ptr, &ftr_header); | |
409 | ||
410 | ftr_header = RIO_GET_BLOCK_ID(ftr_header); | |
411 | switch (ftr_header) { | |
412 | ||
413 | case RIO_EFB_SER_EP_ID_V13P: | |
414 | case RIO_EFB_SER_EP_REC_ID_V13P: | |
415 | case RIO_EFB_SER_EP_FREE_ID_V13P: | |
416 | case RIO_EFB_SER_EP_ID: | |
417 | case RIO_EFB_SER_EP_REC_ID: | |
418 | case RIO_EFB_SER_EP_FREE_ID: | |
419 | case RIO_EFB_SER_EP_FREC_ID: | |
420 | ||
421 | return ext_ftr_ptr; | |
422 | ||
423 | default: | |
424 | break; | |
425 | } | |
426 | ||
427 | ext_ftr_ptr = rio_mport_get_efb(port, local, destid, | |
428 | hopcount, ext_ftr_ptr); | |
429 | } | |
430 | ||
431 | return ext_ftr_ptr; | |
432 | } | |
433 | ||
434 | /** | |
435 | * rio_get_comptag - Begin or continue searching for a RIO device by component tag | |
97ef6f74 | 436 | * @comp_tag: RIO component tag to match |
e5cabeb3 AB |
437 | * @from: Previous RIO device found in search, or %NULL for new search |
438 | * | |
439 | * Iterates through the list of known RIO devices. If a RIO device is | |
440 | * found with a matching @comp_tag, a pointer to its device | |
441 | * structure is returned. Otherwise, %NULL is returned. A new search | |
442 | * is initiated by passing %NULL to the @from argument. Otherwise, if | |
443 | * @from is not %NULL, searches continue from next device on the global | |
444 | * list. | |
445 | */ | |
af84ca38 | 446 | struct rio_dev *rio_get_comptag(u32 comp_tag, struct rio_dev *from) |
e5cabeb3 AB |
447 | { |
448 | struct list_head *n; | |
449 | struct rio_dev *rdev; | |
450 | ||
e5cabeb3 AB |
451 | spin_lock(&rio_global_list_lock); |
452 | n = from ? from->global_list.next : rio_devices.next; | |
453 | ||
454 | while (n && (n != &rio_devices)) { | |
455 | rdev = rio_dev_g(n); | |
456 | if (rdev->comp_tag == comp_tag) | |
457 | goto exit; | |
458 | n = n->next; | |
459 | } | |
460 | rdev = NULL; | |
461 | exit: | |
462 | spin_unlock(&rio_global_list_lock); | |
463 | return rdev; | |
464 | } | |
465 | ||
466 | /** | |
467 | * rio_set_port_lockout - Sets/clears LOCKOUT bit (RIO EM 1.3) for a switch port. | |
468 | * @rdev: Pointer to RIO device control structure | |
469 | * @pnum: Switch port number to set LOCKOUT bit | |
470 | * @lock: Operation : set (=1) or clear (=0) | |
471 | */ | |
472 | int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock) | |
473 | { | |
474 | u8 hopcount = 0xff; | |
475 | u16 destid = rdev->destid; | |
476 | u32 regval; | |
477 | ||
478 | if (rdev->rswitch) { | |
479 | destid = rdev->rswitch->destid; | |
480 | hopcount = rdev->rswitch->hopcount; | |
481 | } | |
482 | ||
483 | rio_mport_read_config_32(rdev->net->hport, destid, hopcount, | |
484 | rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum), | |
485 | ®val); | |
486 | if (lock) | |
487 | regval |= RIO_PORT_N_CTL_LOCKOUT; | |
488 | else | |
489 | regval &= ~RIO_PORT_N_CTL_LOCKOUT; | |
490 | ||
491 | rio_mport_write_config_32(rdev->net->hport, destid, hopcount, | |
492 | rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum), | |
493 | regval); | |
494 | return 0; | |
495 | } | |
496 | ||
6429cd49 AB |
497 | /** |
498 | * rio_chk_dev_route - Validate route to the specified device. | |
499 | * @rdev: RIO device failed to respond | |
500 | * @nrdev: Last active device on the route to rdev | |
501 | * @npnum: nrdev's port number on the route to rdev | |
502 | * | |
503 | * Follows a route to the specified RIO device to determine the last available | |
504 | * device (and corresponding RIO port) on the route. | |
505 | */ | |
506 | static int | |
507 | rio_chk_dev_route(struct rio_dev *rdev, struct rio_dev **nrdev, int *npnum) | |
508 | { | |
509 | u32 result; | |
af84ca38 | 510 | int p_port, dstid, rc = -EIO; |
6429cd49 AB |
511 | struct rio_dev *prev = NULL; |
512 | ||
513 | /* Find switch with failed RIO link */ | |
514 | while (rdev->prev && (rdev->prev->pef & RIO_PEF_SWITCH)) { | |
515 | if (!rio_read_config_32(rdev->prev, RIO_DEV_ID_CAR, &result)) { | |
516 | prev = rdev->prev; | |
517 | break; | |
518 | } | |
519 | rdev = rdev->prev; | |
520 | } | |
521 | ||
522 | if (prev == NULL) | |
523 | goto err_out; | |
524 | ||
af84ca38 AB |
525 | dstid = (rdev->pef & RIO_PEF_SWITCH) ? |
526 | rdev->rswitch->destid : rdev->destid; | |
527 | p_port = prev->rswitch->route_table[dstid]; | |
6429cd49 | 528 | |
af84ca38 | 529 | if (p_port != RIO_INVALID_ROUTE) { |
6429cd49 AB |
530 | pr_debug("RIO: link failed on [%s]-P%d\n", |
531 | rio_name(prev), p_port); | |
532 | *nrdev = prev; | |
533 | *npnum = p_port; | |
534 | rc = 0; | |
535 | } else | |
af84ca38 | 536 | pr_debug("RIO: failed to trace route to %s\n", rio_name(rdev)); |
6429cd49 AB |
537 | err_out: |
538 | return rc; | |
539 | } | |
540 | ||
541 | /** | |
542 | * rio_mport_chk_dev_access - Validate access to the specified device. | |
543 | * @mport: Master port to send transactions | |
544 | * @destid: Device destination ID in network | |
545 | * @hopcount: Number of hops into the network | |
546 | */ | |
e274e0ed | 547 | int |
6429cd49 AB |
548 | rio_mport_chk_dev_access(struct rio_mport *mport, u16 destid, u8 hopcount) |
549 | { | |
550 | int i = 0; | |
551 | u32 tmp; | |
552 | ||
553 | while (rio_mport_read_config_32(mport, destid, hopcount, | |
554 | RIO_DEV_ID_CAR, &tmp)) { | |
555 | i++; | |
556 | if (i == RIO_MAX_CHK_RETRY) | |
557 | return -EIO; | |
558 | mdelay(1); | |
559 | } | |
560 | ||
561 | return 0; | |
562 | } | |
563 | ||
564 | /** | |
565 | * rio_chk_dev_access - Validate access to the specified device. | |
566 | * @rdev: Pointer to RIO device control structure | |
567 | */ | |
568 | static int rio_chk_dev_access(struct rio_dev *rdev) | |
569 | { | |
570 | u8 hopcount = 0xff; | |
571 | u16 destid = rdev->destid; | |
572 | ||
573 | if (rdev->rswitch) { | |
574 | destid = rdev->rswitch->destid; | |
575 | hopcount = rdev->rswitch->hopcount; | |
576 | } | |
577 | ||
578 | return rio_mport_chk_dev_access(rdev->net->hport, destid, hopcount); | |
579 | } | |
580 | ||
dd5648c9 AB |
581 | /** |
582 | * rio_get_input_status - Sends a Link-Request/Input-Status control symbol and | |
583 | * returns link-response (if requested). | |
584 | * @rdev: RIO devive to issue Input-status command | |
585 | * @pnum: Device port number to issue the command | |
586 | * @lnkresp: Response from a link partner | |
587 | */ | |
588 | static int | |
589 | rio_get_input_status(struct rio_dev *rdev, int pnum, u32 *lnkresp) | |
590 | { | |
591 | struct rio_mport *mport = rdev->net->hport; | |
592 | u16 destid = rdev->rswitch->destid; | |
593 | u8 hopcount = rdev->rswitch->hopcount; | |
594 | u32 regval; | |
595 | int checkcount; | |
596 | ||
597 | if (lnkresp) { | |
598 | /* Read from link maintenance response register | |
599 | * to clear valid bit */ | |
600 | rio_mport_read_config_32(mport, destid, hopcount, | |
601 | rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum), | |
602 | ®val); | |
603 | udelay(50); | |
604 | } | |
605 | ||
606 | /* Issue Input-status command */ | |
607 | rio_mport_write_config_32(mport, destid, hopcount, | |
608 | rdev->phys_efptr + RIO_PORT_N_MNT_REQ_CSR(pnum), | |
609 | RIO_MNT_REQ_CMD_IS); | |
610 | ||
611 | /* Exit if the response is not expected */ | |
612 | if (lnkresp == NULL) | |
613 | return 0; | |
614 | ||
615 | checkcount = 3; | |
616 | while (checkcount--) { | |
617 | udelay(50); | |
618 | rio_mport_read_config_32(mport, destid, hopcount, | |
619 | rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum), | |
620 | ®val); | |
621 | if (regval & RIO_PORT_N_MNT_RSP_RVAL) { | |
622 | *lnkresp = regval; | |
623 | return 0; | |
624 | } | |
625 | } | |
626 | ||
627 | return -EIO; | |
628 | } | |
629 | ||
630 | /** | |
631 | * rio_clr_err_stopped - Clears port Error-stopped states. | |
632 | * @rdev: Pointer to RIO device control structure | |
633 | * @pnum: Switch port number to clear errors | |
634 | * @err_status: port error status (if 0 reads register from device) | |
635 | */ | |
636 | static int rio_clr_err_stopped(struct rio_dev *rdev, u32 pnum, u32 err_status) | |
637 | { | |
638 | struct rio_mport *mport = rdev->net->hport; | |
639 | u16 destid = rdev->rswitch->destid; | |
640 | u8 hopcount = rdev->rswitch->hopcount; | |
641 | struct rio_dev *nextdev = rdev->rswitch->nextdev[pnum]; | |
642 | u32 regval; | |
643 | u32 far_ackid, far_linkstat, near_ackid; | |
644 | ||
645 | if (err_status == 0) | |
646 | rio_mport_read_config_32(mport, destid, hopcount, | |
647 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), | |
648 | &err_status); | |
649 | ||
650 | if (err_status & RIO_PORT_N_ERR_STS_PW_OUT_ES) { | |
651 | pr_debug("RIO_EM: servicing Output Error-Stopped state\n"); | |
652 | /* | |
653 | * Send a Link-Request/Input-Status control symbol | |
654 | */ | |
655 | if (rio_get_input_status(rdev, pnum, ®val)) { | |
656 | pr_debug("RIO_EM: Input-status response timeout\n"); | |
657 | goto rd_err; | |
658 | } | |
659 | ||
660 | pr_debug("RIO_EM: SP%d Input-status response=0x%08x\n", | |
661 | pnum, regval); | |
662 | far_ackid = (regval & RIO_PORT_N_MNT_RSP_ASTAT) >> 5; | |
663 | far_linkstat = regval & RIO_PORT_N_MNT_RSP_LSTAT; | |
664 | rio_mport_read_config_32(mport, destid, hopcount, | |
665 | rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum), | |
666 | ®val); | |
667 | pr_debug("RIO_EM: SP%d_ACK_STS_CSR=0x%08x\n", pnum, regval); | |
668 | near_ackid = (regval & RIO_PORT_N_ACK_INBOUND) >> 24; | |
669 | pr_debug("RIO_EM: SP%d far_ackID=0x%02x far_linkstat=0x%02x" \ | |
670 | " near_ackID=0x%02x\n", | |
671 | pnum, far_ackid, far_linkstat, near_ackid); | |
672 | ||
673 | /* | |
674 | * If required, synchronize ackIDs of near and | |
675 | * far sides. | |
676 | */ | |
677 | if ((far_ackid != ((regval & RIO_PORT_N_ACK_OUTSTAND) >> 8)) || | |
678 | (far_ackid != (regval & RIO_PORT_N_ACK_OUTBOUND))) { | |
679 | /* Align near outstanding/outbound ackIDs with | |
680 | * far inbound. | |
681 | */ | |
682 | rio_mport_write_config_32(mport, destid, | |
683 | hopcount, rdev->phys_efptr + | |
684 | RIO_PORT_N_ACK_STS_CSR(pnum), | |
685 | (near_ackid << 24) | | |
686 | (far_ackid << 8) | far_ackid); | |
687 | /* Align far outstanding/outbound ackIDs with | |
688 | * near inbound. | |
689 | */ | |
690 | far_ackid++; | |
691 | if (nextdev) | |
692 | rio_write_config_32(nextdev, | |
693 | nextdev->phys_efptr + | |
694 | RIO_PORT_N_ACK_STS_CSR(RIO_GET_PORT_NUM(nextdev->swpinfo)), | |
695 | (far_ackid << 24) | | |
696 | (near_ackid << 8) | near_ackid); | |
697 | else | |
698 | pr_debug("RIO_EM: Invalid nextdev pointer (NULL)\n"); | |
699 | } | |
700 | rd_err: | |
701 | rio_mport_read_config_32(mport, destid, hopcount, | |
702 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), | |
703 | &err_status); | |
704 | pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status); | |
705 | } | |
706 | ||
707 | if ((err_status & RIO_PORT_N_ERR_STS_PW_INP_ES) && nextdev) { | |
708 | pr_debug("RIO_EM: servicing Input Error-Stopped state\n"); | |
709 | rio_get_input_status(nextdev, | |
710 | RIO_GET_PORT_NUM(nextdev->swpinfo), NULL); | |
711 | udelay(50); | |
712 | ||
713 | rio_mport_read_config_32(mport, destid, hopcount, | |
714 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), | |
715 | &err_status); | |
716 | pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status); | |
717 | } | |
718 | ||
719 | return (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES | | |
720 | RIO_PORT_N_ERR_STS_PW_INP_ES)) ? 1 : 0; | |
721 | } | |
722 | ||
e5cabeb3 AB |
723 | /** |
724 | * rio_inb_pwrite_handler - process inbound port-write message | |
725 | * @pw_msg: pointer to inbound port-write message | |
726 | * | |
727 | * Processes an inbound port-write message. Returns 0 if the request | |
728 | * has been satisfied. | |
729 | */ | |
730 | int rio_inb_pwrite_handler(union rio_pw_msg *pw_msg) | |
731 | { | |
732 | struct rio_dev *rdev; | |
733 | struct rio_mport *mport; | |
734 | u8 hopcount; | |
735 | u16 destid; | |
dd5648c9 | 736 | u32 err_status, em_perrdet, em_ltlerrdet; |
e5cabeb3 AB |
737 | int rc, portnum; |
738 | ||
739 | rdev = rio_get_comptag(pw_msg->em.comptag, NULL); | |
740 | if (rdev == NULL) { | |
6429cd49 AB |
741 | /* Device removed or enumeration error */ |
742 | pr_debug("RIO: %s No matching device for CTag 0x%08x\n", | |
e5cabeb3 AB |
743 | __func__, pw_msg->em.comptag); |
744 | return -EIO; | |
745 | } | |
746 | ||
747 | pr_debug("RIO: Port-Write message from %s\n", rio_name(rdev)); | |
748 | ||
749 | #ifdef DEBUG_PW | |
750 | { | |
751 | u32 i; | |
752 | for (i = 0; i < RIO_PW_MSG_SIZE/sizeof(u32);) { | |
dd5648c9 | 753 | pr_debug("0x%02x: %08x %08x %08x %08x\n", |
e5cabeb3 AB |
754 | i*4, pw_msg->raw[i], pw_msg->raw[i + 1], |
755 | pw_msg->raw[i + 2], pw_msg->raw[i + 3]); | |
756 | i += 4; | |
757 | } | |
e5cabeb3 AB |
758 | } |
759 | #endif | |
760 | ||
761 | /* Call an external service function (if such is registered | |
762 | * for this device). This may be the service for endpoints that send | |
763 | * device-specific port-write messages. End-point messages expected | |
764 | * to be handled completely by EP specific device driver. | |
765 | * For switches rc==0 signals that no standard processing required. | |
766 | */ | |
767 | if (rdev->pwcback != NULL) { | |
768 | rc = rdev->pwcback(rdev, pw_msg, 0); | |
769 | if (rc == 0) | |
770 | return 0; | |
771 | } | |
772 | ||
6429cd49 AB |
773 | portnum = pw_msg->em.is_port & 0xFF; |
774 | ||
775 | /* Check if device and route to it are functional: | |
776 | * Sometimes devices may send PW message(s) just before being | |
777 | * powered down (or link being lost). | |
778 | */ | |
779 | if (rio_chk_dev_access(rdev)) { | |
780 | pr_debug("RIO: device access failed - get link partner\n"); | |
781 | /* Scan route to the device and identify failed link. | |
782 | * This will replace device and port reported in PW message. | |
783 | * PW message should not be used after this point. | |
784 | */ | |
785 | if (rio_chk_dev_route(rdev, &rdev, &portnum)) { | |
786 | pr_err("RIO: Route trace for %s failed\n", | |
787 | rio_name(rdev)); | |
788 | return -EIO; | |
789 | } | |
790 | pw_msg = NULL; | |
791 | } | |
792 | ||
e5cabeb3 AB |
793 | /* For End-point devices processing stops here */ |
794 | if (!(rdev->pef & RIO_PEF_SWITCH)) | |
795 | return 0; | |
796 | ||
797 | if (rdev->phys_efptr == 0) { | |
798 | pr_err("RIO_PW: Bad switch initialization for %s\n", | |
799 | rio_name(rdev)); | |
800 | return 0; | |
801 | } | |
802 | ||
803 | mport = rdev->net->hport; | |
804 | destid = rdev->rswitch->destid; | |
805 | hopcount = rdev->rswitch->hopcount; | |
806 | ||
807 | /* | |
808 | * Process the port-write notification from switch | |
809 | */ | |
e5cabeb3 AB |
810 | if (rdev->rswitch->em_handle) |
811 | rdev->rswitch->em_handle(rdev, portnum); | |
812 | ||
813 | rio_mport_read_config_32(mport, destid, hopcount, | |
814 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), | |
815 | &err_status); | |
816 | pr_debug("RIO_PW: SP%d_ERR_STS_CSR=0x%08x\n", portnum, err_status); | |
817 | ||
dd5648c9 | 818 | if (err_status & RIO_PORT_N_ERR_STS_PORT_OK) { |
e5cabeb3 | 819 | |
dd5648c9 AB |
820 | if (!(rdev->rswitch->port_ok & (1 << portnum))) { |
821 | rdev->rswitch->port_ok |= (1 << portnum); | |
822 | rio_set_port_lockout(rdev, portnum, 0); | |
823 | /* Schedule Insertion Service */ | |
824 | pr_debug("RIO_PW: Device Insertion on [%s]-P%d\n", | |
825 | rio_name(rdev), portnum); | |
826 | } | |
e5cabeb3 | 827 | |
dd5648c9 AB |
828 | /* Clear error-stopped states (if reported). |
829 | * Depending on the link partner state, two attempts | |
830 | * may be needed for successful recovery. | |
831 | */ | |
832 | if (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES | | |
833 | RIO_PORT_N_ERR_STS_PW_INP_ES)) { | |
834 | if (rio_clr_err_stopped(rdev, portnum, err_status)) | |
835 | rio_clr_err_stopped(rdev, portnum, 0); | |
836 | } | |
837 | } else { /* if (err_status & RIO_PORT_N_ERR_STS_PORT_UNINIT) */ | |
e5cabeb3 | 838 | |
dd5648c9 | 839 | if (rdev->rswitch->port_ok & (1 << portnum)) { |
e5cabeb3 AB |
840 | rdev->rswitch->port_ok &= ~(1 << portnum); |
841 | rio_set_port_lockout(rdev, portnum, 1); | |
842 | ||
843 | rio_mport_write_config_32(mport, destid, hopcount, | |
844 | rdev->phys_efptr + | |
845 | RIO_PORT_N_ACK_STS_CSR(portnum), | |
846 | RIO_PORT_N_ACK_CLEAR); | |
847 | ||
848 | /* Schedule Extraction Service */ | |
849 | pr_debug("RIO_PW: Device Extraction on [%s]-P%d\n", | |
850 | rio_name(rdev), portnum); | |
851 | } | |
dd5648c9 | 852 | } |
e5cabeb3 | 853 | |
dd5648c9 AB |
854 | rio_mport_read_config_32(mport, destid, hopcount, |
855 | rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), &em_perrdet); | |
856 | if (em_perrdet) { | |
857 | pr_debug("RIO_PW: RIO_EM_P%d_ERR_DETECT=0x%08x\n", | |
858 | portnum, em_perrdet); | |
859 | /* Clear EM Port N Error Detect CSR */ | |
860 | rio_mport_write_config_32(mport, destid, hopcount, | |
861 | rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), 0); | |
862 | } | |
863 | ||
864 | rio_mport_read_config_32(mport, destid, hopcount, | |
865 | rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, &em_ltlerrdet); | |
866 | if (em_ltlerrdet) { | |
867 | pr_debug("RIO_PW: RIO_EM_LTL_ERR_DETECT=0x%08x\n", | |
868 | em_ltlerrdet); | |
869 | /* Clear EM L/T Layer Error Detect CSR */ | |
870 | rio_mport_write_config_32(mport, destid, hopcount, | |
871 | rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, 0); | |
e5cabeb3 AB |
872 | } |
873 | ||
388c45cc | 874 | /* Clear remaining error bits and Port-Write Pending bit */ |
dd5648c9 AB |
875 | rio_mport_write_config_32(mport, destid, hopcount, |
876 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), | |
388c45cc | 877 | err_status); |
e5cabeb3 AB |
878 | |
879 | return 0; | |
880 | } | |
881 | EXPORT_SYMBOL_GPL(rio_inb_pwrite_handler); | |
882 | ||
883 | /** | |
884 | * rio_mport_get_efb - get pointer to next extended features block | |
885 | * @port: Master port to issue transaction | |
886 | * @local: Indicate a local master port or remote device access | |
887 | * @destid: Destination ID of the device | |
888 | * @hopcount: Number of switch hops to the device | |
889 | * @from: Offset of current Extended Feature block header (if 0 starts | |
890 | * from ExtFeaturePtr) | |
891 | */ | |
892 | u32 | |
893 | rio_mport_get_efb(struct rio_mport *port, int local, u16 destid, | |
894 | u8 hopcount, u32 from) | |
895 | { | |
896 | u32 reg_val; | |
897 | ||
898 | if (from == 0) { | |
899 | if (local) | |
900 | rio_local_read_config_32(port, RIO_ASM_INFO_CAR, | |
901 | ®_val); | |
902 | else | |
903 | rio_mport_read_config_32(port, destid, hopcount, | |
904 | RIO_ASM_INFO_CAR, ®_val); | |
905 | return reg_val & RIO_EXT_FTR_PTR_MASK; | |
906 | } else { | |
907 | if (local) | |
908 | rio_local_read_config_32(port, from, ®_val); | |
909 | else | |
910 | rio_mport_read_config_32(port, destid, hopcount, | |
911 | from, ®_val); | |
912 | return RIO_GET_BLOCK_ID(reg_val); | |
913 | } | |
914 | } | |
915 | ||
394b701c MP |
916 | /** |
917 | * rio_mport_get_feature - query for devices' extended features | |
918 | * @port: Master port to issue transaction | |
919 | * @local: Indicate a local master port or remote device access | |
920 | * @destid: Destination ID of the device | |
921 | * @hopcount: Number of switch hops to the device | |
922 | * @ftr: Extended feature code | |
923 | * | |
924 | * Tell if a device supports a given RapidIO capability. | |
925 | * Returns the offset of the requested extended feature | |
926 | * block within the device's RIO configuration space or | |
927 | * 0 in case the device does not support it. Possible | |
928 | * values for @ftr: | |
929 | * | |
930 | * %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices | |
931 | * | |
932 | * %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices | |
933 | * | |
934 | * %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices | |
935 | * | |
936 | * %RIO_EFB_SER_EP_ID LP/Serial EP Devices | |
937 | * | |
938 | * %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices | |
939 | * | |
940 | * %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices | |
941 | */ | |
942 | u32 | |
943 | rio_mport_get_feature(struct rio_mport * port, int local, u16 destid, | |
944 | u8 hopcount, int ftr) | |
945 | { | |
946 | u32 asm_info, ext_ftr_ptr, ftr_header; | |
947 | ||
948 | if (local) | |
949 | rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info); | |
950 | else | |
951 | rio_mport_read_config_32(port, destid, hopcount, | |
952 | RIO_ASM_INFO_CAR, &asm_info); | |
953 | ||
954 | ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK; | |
955 | ||
956 | while (ext_ftr_ptr) { | |
957 | if (local) | |
958 | rio_local_read_config_32(port, ext_ftr_ptr, | |
959 | &ftr_header); | |
960 | else | |
961 | rio_mport_read_config_32(port, destid, hopcount, | |
962 | ext_ftr_ptr, &ftr_header); | |
963 | if (RIO_GET_BLOCK_ID(ftr_header) == ftr) | |
964 | return ext_ftr_ptr; | |
965 | if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header))) | |
966 | break; | |
967 | } | |
968 | ||
969 | return 0; | |
970 | } | |
971 | ||
972 | /** | |
973 | * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did | |
974 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids | |
975 | * @did: RIO did to match or %RIO_ANY_ID to match all dids | |
976 | * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids | |
977 | * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids | |
978 | * @from: Previous RIO device found in search, or %NULL for new search | |
979 | * | |
980 | * Iterates through the list of known RIO devices. If a RIO device is | |
981 | * found with a matching @vid, @did, @asm_vid, @asm_did, the reference | |
982 | * count to the device is incrememted and a pointer to its device | |
983 | * structure is returned. Otherwise, %NULL is returned. A new search | |
984 | * is initiated by passing %NULL to the @from argument. Otherwise, if | |
985 | * @from is not %NULL, searches continue from next device on the global | |
986 | * list. The reference count for @from is always decremented if it is | |
987 | * not %NULL. | |
988 | */ | |
989 | struct rio_dev *rio_get_asm(u16 vid, u16 did, | |
990 | u16 asm_vid, u16 asm_did, struct rio_dev *from) | |
991 | { | |
992 | struct list_head *n; | |
993 | struct rio_dev *rdev; | |
994 | ||
995 | WARN_ON(in_interrupt()); | |
996 | spin_lock(&rio_global_list_lock); | |
997 | n = from ? from->global_list.next : rio_devices.next; | |
998 | ||
999 | while (n && (n != &rio_devices)) { | |
1000 | rdev = rio_dev_g(n); | |
1001 | if ((vid == RIO_ANY_ID || rdev->vid == vid) && | |
1002 | (did == RIO_ANY_ID || rdev->did == did) && | |
1003 | (asm_vid == RIO_ANY_ID || rdev->asm_vid == asm_vid) && | |
1004 | (asm_did == RIO_ANY_ID || rdev->asm_did == asm_did)) | |
1005 | goto exit; | |
1006 | n = n->next; | |
1007 | } | |
1008 | rdev = NULL; | |
1009 | exit: | |
1010 | rio_dev_put(from); | |
1011 | rdev = rio_dev_get(rdev); | |
1012 | spin_unlock(&rio_global_list_lock); | |
1013 | return rdev; | |
1014 | } | |
1015 | ||
1016 | /** | |
1017 | * rio_get_device - Begin or continue searching for a RIO device by vid/did | |
1018 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids | |
1019 | * @did: RIO did to match or %RIO_ANY_ID to match all dids | |
1020 | * @from: Previous RIO device found in search, or %NULL for new search | |
1021 | * | |
1022 | * Iterates through the list of known RIO devices. If a RIO device is | |
1023 | * found with a matching @vid and @did, the reference count to the | |
1024 | * device is incrememted and a pointer to its device structure is returned. | |
1025 | * Otherwise, %NULL is returned. A new search is initiated by passing %NULL | |
1026 | * to the @from argument. Otherwise, if @from is not %NULL, searches | |
1027 | * continue from next device on the global list. The reference count for | |
1028 | * @from is always decremented if it is not %NULL. | |
1029 | */ | |
1030 | struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from) | |
1031 | { | |
1032 | return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from); | |
1033 | } | |
1034 | ||
07590ff0 AB |
1035 | /** |
1036 | * rio_std_route_add_entry - Add switch route table entry using standard | |
1037 | * registers defined in RIO specification rev.1.3 | |
1038 | * @mport: Master port to issue transaction | |
1039 | * @destid: Destination ID of the device | |
1040 | * @hopcount: Number of switch hops to the device | |
1041 | * @table: routing table ID (global or port-specific) | |
1042 | * @route_destid: destID entry in the RT | |
1043 | * @route_port: destination port for specified destID | |
1044 | */ | |
1045 | int rio_std_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount, | |
1046 | u16 table, u16 route_destid, u8 route_port) | |
1047 | { | |
1048 | if (table == RIO_GLOBAL_TABLE) { | |
1049 | rio_mport_write_config_32(mport, destid, hopcount, | |
1050 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, | |
1051 | (u32)route_destid); | |
1052 | rio_mport_write_config_32(mport, destid, hopcount, | |
1053 | RIO_STD_RTE_CONF_PORT_SEL_CSR, | |
1054 | (u32)route_port); | |
1055 | } | |
e5cabeb3 | 1056 | |
07590ff0 AB |
1057 | udelay(10); |
1058 | return 0; | |
1059 | } | |
1060 | ||
1061 | /** | |
1062 | * rio_std_route_get_entry - Read switch route table entry (port number) | |
638c5945 | 1063 | * associated with specified destID using standard registers defined in RIO |
07590ff0 AB |
1064 | * specification rev.1.3 |
1065 | * @mport: Master port to issue transaction | |
1066 | * @destid: Destination ID of the device | |
1067 | * @hopcount: Number of switch hops to the device | |
1068 | * @table: routing table ID (global or port-specific) | |
1069 | * @route_destid: destID entry in the RT | |
1070 | * @route_port: returned destination port for specified destID | |
1071 | */ | |
1072 | int rio_std_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount, | |
1073 | u16 table, u16 route_destid, u8 *route_port) | |
1074 | { | |
1075 | u32 result; | |
1076 | ||
1077 | if (table == RIO_GLOBAL_TABLE) { | |
1078 | rio_mport_write_config_32(mport, destid, hopcount, | |
1079 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid); | |
1080 | rio_mport_read_config_32(mport, destid, hopcount, | |
1081 | RIO_STD_RTE_CONF_PORT_SEL_CSR, &result); | |
1082 | ||
1083 | *route_port = (u8)result; | |
1084 | } | |
1085 | ||
1086 | return 0; | |
1087 | } | |
1088 | ||
1089 | /** | |
1090 | * rio_std_route_clr_table - Clear swotch route table using standard registers | |
1091 | * defined in RIO specification rev.1.3. | |
1092 | * @mport: Master port to issue transaction | |
07590ff0 AB |
1093 | * @destid: Destination ID of the device |
1094 | * @hopcount: Number of switch hops to the device | |
1095 | * @table: routing table ID (global or port-specific) | |
1096 | */ | |
1097 | int rio_std_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount, | |
1098 | u16 table) | |
1099 | { | |
1100 | u32 max_destid = 0xff; | |
1101 | u32 i, pef, id_inc = 1, ext_cfg = 0; | |
1102 | u32 port_sel = RIO_INVALID_ROUTE; | |
1103 | ||
1104 | if (table == RIO_GLOBAL_TABLE) { | |
1105 | rio_mport_read_config_32(mport, destid, hopcount, | |
1106 | RIO_PEF_CAR, &pef); | |
1107 | ||
1108 | if (mport->sys_size) { | |
1109 | rio_mport_read_config_32(mport, destid, hopcount, | |
1110 | RIO_SWITCH_RT_LIMIT, | |
1111 | &max_destid); | |
1112 | max_destid &= RIO_RT_MAX_DESTID; | |
1113 | } | |
1114 | ||
1115 | if (pef & RIO_PEF_EXT_RT) { | |
1116 | ext_cfg = 0x80000000; | |
1117 | id_inc = 4; | |
1118 | port_sel = (RIO_INVALID_ROUTE << 24) | | |
1119 | (RIO_INVALID_ROUTE << 16) | | |
1120 | (RIO_INVALID_ROUTE << 8) | | |
1121 | RIO_INVALID_ROUTE; | |
1122 | } | |
1123 | ||
1124 | for (i = 0; i <= max_destid;) { | |
1125 | rio_mport_write_config_32(mport, destid, hopcount, | |
1126 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, | |
1127 | ext_cfg | i); | |
1128 | rio_mport_write_config_32(mport, destid, hopcount, | |
1129 | RIO_STD_RTE_CONF_PORT_SEL_CSR, | |
1130 | port_sel); | |
1131 | i += id_inc; | |
1132 | } | |
1133 | } | |
1134 | ||
1135 | udelay(10); | |
1136 | return 0; | |
1137 | } | |
1138 | ||
394b701c MP |
1139 | static void rio_fixup_device(struct rio_dev *dev) |
1140 | { | |
1141 | } | |
1142 | ||
1143 | static int __devinit rio_init(void) | |
1144 | { | |
1145 | struct rio_dev *dev = NULL; | |
1146 | ||
1147 | while ((dev = rio_get_device(RIO_ANY_ID, RIO_ANY_ID, dev)) != NULL) { | |
1148 | rio_fixup_device(dev); | |
1149 | } | |
1150 | return 0; | |
1151 | } | |
1152 | ||
1153 | device_initcall(rio_init); | |
1154 | ||
37d33d15 | 1155 | int __devinit rio_init_mports(void) |
394b701c MP |
1156 | { |
1157 | int rc = 0; | |
1158 | struct rio_mport *port; | |
1159 | ||
1160 | list_for_each_entry(port, &rio_mports, node) { | |
1161 | if (!request_mem_region(port->iores.start, | |
88cf81fc | 1162 | resource_size(&port->iores), |
394b701c MP |
1163 | port->name)) { |
1164 | printk(KERN_ERR | |
5febf1cd | 1165 | "RIO: Error requesting master port region 0x%016llx-0x%016llx\n", |
88cf81fc | 1166 | (u64)port->iores.start, (u64)port->iores.end); |
394b701c MP |
1167 | rc = -ENOMEM; |
1168 | goto out; | |
1169 | } | |
1170 | ||
1171 | if (port->host_deviceid >= 0) | |
1172 | rio_enum_mport(port); | |
1173 | else | |
1174 | rio_disc_mport(port); | |
1175 | } | |
1176 | ||
1177 | out: | |
1178 | return rc; | |
1179 | } | |
1180 | ||
1181 | void rio_register_mport(struct rio_mport *port) | |
1182 | { | |
1183 | list_add_tail(&port->node, &rio_mports); | |
1184 | } | |
1185 | ||
1186 | EXPORT_SYMBOL_GPL(rio_local_get_device_id); | |
1187 | EXPORT_SYMBOL_GPL(rio_get_device); | |
1188 | EXPORT_SYMBOL_GPL(rio_get_asm); | |
1189 | EXPORT_SYMBOL_GPL(rio_request_inb_dbell); | |
1190 | EXPORT_SYMBOL_GPL(rio_release_inb_dbell); | |
1191 | EXPORT_SYMBOL_GPL(rio_request_outb_dbell); | |
1192 | EXPORT_SYMBOL_GPL(rio_release_outb_dbell); | |
1193 | EXPORT_SYMBOL_GPL(rio_request_inb_mbox); | |
1194 | EXPORT_SYMBOL_GPL(rio_release_inb_mbox); | |
1195 | EXPORT_SYMBOL_GPL(rio_request_outb_mbox); | |
1196 | EXPORT_SYMBOL_GPL(rio_release_outb_mbox); |