]>
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); | |
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 | { | |
f8f06269 AB |
71 | int rc = -ENOSYS; |
72 | struct resource *res; | |
394b701c | 73 | |
f8f06269 AB |
74 | if (mport->ops->open_inb_mbox == NULL) |
75 | goto out; | |
76 | ||
77 | res = kmalloc(sizeof(struct resource), GFP_KERNEL); | |
394b701c MP |
78 | |
79 | if (res) { | |
80 | rio_init_mbox_res(res, mbox, mbox); | |
81 | ||
82 | /* Make sure this mailbox isn't in use */ | |
83 | if ((rc = | |
84 | request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE], | |
85 | res)) < 0) { | |
86 | kfree(res); | |
87 | goto out; | |
88 | } | |
89 | ||
90 | mport->inb_msg[mbox].res = res; | |
91 | ||
92 | /* Hook the inbound message callback */ | |
93 | mport->inb_msg[mbox].mcback = minb; | |
94 | ||
f8f06269 | 95 | rc = mport->ops->open_inb_mbox(mport, dev_id, mbox, entries); |
394b701c MP |
96 | } else |
97 | rc = -ENOMEM; | |
98 | ||
99 | out: | |
100 | return rc; | |
101 | } | |
102 | ||
103 | /** | |
104 | * rio_release_inb_mbox - release inbound mailbox message service | |
105 | * @mport: RIO master port from which to release the mailbox resource | |
106 | * @mbox: Mailbox number to release | |
107 | * | |
108 | * Releases ownership of an inbound mailbox resource. Returns 0 | |
109 | * if the request has been satisfied. | |
110 | */ | |
111 | int rio_release_inb_mbox(struct rio_mport *mport, int mbox) | |
112 | { | |
f8f06269 AB |
113 | if (mport->ops->close_inb_mbox) { |
114 | mport->ops->close_inb_mbox(mport, mbox); | |
394b701c | 115 | |
f8f06269 AB |
116 | /* Release the mailbox resource */ |
117 | return release_resource(mport->inb_msg[mbox].res); | |
118 | } else | |
119 | return -ENOSYS; | |
394b701c MP |
120 | } |
121 | ||
122 | /** | |
123 | * rio_request_outb_mbox - request outbound mailbox service | |
124 | * @mport: RIO master port from which to allocate the mailbox resource | |
6978bbc0 | 125 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
126 | * @mbox: Mailbox number to claim |
127 | * @entries: Number of entries in outbound mailbox queue | |
128 | * @moutb: Callback to execute when outbound message is sent | |
129 | * | |
130 | * Requests ownership of an outbound mailbox resource and binds | |
131 | * a callback function to the resource. Returns 0 on success. | |
132 | */ | |
133 | int rio_request_outb_mbox(struct rio_mport *mport, | |
6978bbc0 | 134 | void *dev_id, |
394b701c MP |
135 | int mbox, |
136 | int entries, | |
6978bbc0 | 137 | void (*moutb) (struct rio_mport * mport, void *dev_id, int mbox, int slot)) |
394b701c | 138 | { |
f8f06269 AB |
139 | int rc = -ENOSYS; |
140 | struct resource *res; | |
394b701c | 141 | |
f8f06269 AB |
142 | if (mport->ops->open_outb_mbox == NULL) |
143 | goto out; | |
144 | ||
145 | res = kmalloc(sizeof(struct resource), GFP_KERNEL); | |
394b701c MP |
146 | |
147 | if (res) { | |
148 | rio_init_mbox_res(res, mbox, mbox); | |
149 | ||
150 | /* Make sure this outbound mailbox isn't in use */ | |
151 | if ((rc = | |
152 | request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE], | |
153 | res)) < 0) { | |
154 | kfree(res); | |
155 | goto out; | |
156 | } | |
157 | ||
158 | mport->outb_msg[mbox].res = res; | |
159 | ||
160 | /* Hook the inbound message callback */ | |
161 | mport->outb_msg[mbox].mcback = moutb; | |
162 | ||
f8f06269 | 163 | rc = mport->ops->open_outb_mbox(mport, dev_id, mbox, entries); |
394b701c MP |
164 | } else |
165 | rc = -ENOMEM; | |
166 | ||
167 | out: | |
168 | return rc; | |
169 | } | |
170 | ||
171 | /** | |
172 | * rio_release_outb_mbox - release outbound mailbox message service | |
173 | * @mport: RIO master port from which to release the mailbox resource | |
174 | * @mbox: Mailbox number to release | |
175 | * | |
176 | * Releases ownership of an inbound mailbox resource. Returns 0 | |
177 | * if the request has been satisfied. | |
178 | */ | |
179 | int rio_release_outb_mbox(struct rio_mport *mport, int mbox) | |
180 | { | |
f8f06269 AB |
181 | if (mport->ops->close_outb_mbox) { |
182 | mport->ops->close_outb_mbox(mport, mbox); | |
394b701c | 183 | |
f8f06269 AB |
184 | /* Release the mailbox resource */ |
185 | return release_resource(mport->outb_msg[mbox].res); | |
186 | } else | |
187 | return -ENOSYS; | |
394b701c MP |
188 | } |
189 | ||
190 | /** | |
191 | * rio_setup_inb_dbell - bind inbound doorbell callback | |
192 | * @mport: RIO master port to bind the doorbell callback | |
6978bbc0 | 193 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
194 | * @res: Doorbell message resource |
195 | * @dinb: Callback to execute when doorbell is received | |
196 | * | |
197 | * Adds a doorbell resource/callback pair into a port's | |
198 | * doorbell event list. Returns 0 if the request has been | |
199 | * satisfied. | |
200 | */ | |
201 | static int | |
6978bbc0 MP |
202 | rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res, |
203 | void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst, | |
394b701c MP |
204 | u16 info)) |
205 | { | |
206 | int rc = 0; | |
207 | struct rio_dbell *dbell; | |
208 | ||
209 | if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) { | |
210 | rc = -ENOMEM; | |
211 | goto out; | |
212 | } | |
213 | ||
214 | dbell->res = res; | |
215 | dbell->dinb = dinb; | |
6978bbc0 | 216 | dbell->dev_id = dev_id; |
394b701c MP |
217 | |
218 | list_add_tail(&dbell->node, &mport->dbells); | |
219 | ||
220 | out: | |
221 | return rc; | |
222 | } | |
223 | ||
224 | /** | |
225 | * rio_request_inb_dbell - request inbound doorbell message service | |
226 | * @mport: RIO master port from which to allocate the doorbell resource | |
6978bbc0 | 227 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
228 | * @start: Doorbell info range start |
229 | * @end: Doorbell info range end | |
230 | * @dinb: Callback to execute when doorbell is received | |
231 | * | |
232 | * Requests ownership of an inbound doorbell resource and binds | |
233 | * a callback function to the resource. Returns 0 if the request | |
234 | * has been satisfied. | |
235 | */ | |
236 | int rio_request_inb_dbell(struct rio_mport *mport, | |
6978bbc0 | 237 | void *dev_id, |
394b701c MP |
238 | u16 start, |
239 | u16 end, | |
6978bbc0 | 240 | void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, |
394b701c MP |
241 | u16 dst, u16 info)) |
242 | { | |
243 | int rc = 0; | |
244 | ||
245 | struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); | |
246 | ||
247 | if (res) { | |
248 | rio_init_dbell_res(res, start, end); | |
249 | ||
250 | /* Make sure these doorbells aren't in use */ | |
251 | if ((rc = | |
252 | request_resource(&mport->riores[RIO_DOORBELL_RESOURCE], | |
253 | res)) < 0) { | |
254 | kfree(res); | |
255 | goto out; | |
256 | } | |
257 | ||
258 | /* Hook the doorbell callback */ | |
6978bbc0 | 259 | rc = rio_setup_inb_dbell(mport, dev_id, res, dinb); |
394b701c MP |
260 | } else |
261 | rc = -ENOMEM; | |
262 | ||
263 | out: | |
264 | return rc; | |
265 | } | |
266 | ||
267 | /** | |
268 | * rio_release_inb_dbell - release inbound doorbell message service | |
269 | * @mport: RIO master port from which to release the doorbell resource | |
270 | * @start: Doorbell info range start | |
271 | * @end: Doorbell info range end | |
272 | * | |
273 | * Releases ownership of an inbound doorbell resource and removes | |
274 | * callback from the doorbell event list. Returns 0 if the request | |
275 | * has been satisfied. | |
276 | */ | |
277 | int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end) | |
278 | { | |
279 | int rc = 0, found = 0; | |
280 | struct rio_dbell *dbell; | |
281 | ||
282 | list_for_each_entry(dbell, &mport->dbells, node) { | |
283 | if ((dbell->res->start == start) && (dbell->res->end == end)) { | |
284 | found = 1; | |
285 | break; | |
286 | } | |
287 | } | |
288 | ||
289 | /* If we can't find an exact match, fail */ | |
290 | if (!found) { | |
291 | rc = -EINVAL; | |
292 | goto out; | |
293 | } | |
294 | ||
295 | /* Delete from list */ | |
296 | list_del(&dbell->node); | |
297 | ||
298 | /* Release the doorbell resource */ | |
299 | rc = release_resource(dbell->res); | |
300 | ||
301 | /* Free the doorbell event */ | |
302 | kfree(dbell); | |
303 | ||
304 | out: | |
305 | return rc; | |
306 | } | |
307 | ||
308 | /** | |
309 | * rio_request_outb_dbell - request outbound doorbell message range | |
310 | * @rdev: RIO device from which to allocate the doorbell resource | |
311 | * @start: Doorbell message range start | |
312 | * @end: Doorbell message range end | |
313 | * | |
314 | * Requests ownership of a doorbell message range. Returns a resource | |
315 | * if the request has been satisfied or %NULL on failure. | |
316 | */ | |
317 | struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start, | |
318 | u16 end) | |
319 | { | |
320 | struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL); | |
321 | ||
322 | if (res) { | |
323 | rio_init_dbell_res(res, start, end); | |
324 | ||
325 | /* Make sure these doorbells aren't in use */ | |
326 | if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res) | |
327 | < 0) { | |
328 | kfree(res); | |
329 | res = NULL; | |
330 | } | |
331 | } | |
332 | ||
333 | return res; | |
334 | } | |
335 | ||
336 | /** | |
337 | * rio_release_outb_dbell - release outbound doorbell message range | |
338 | * @rdev: RIO device from which to release the doorbell resource | |
339 | * @res: Doorbell resource to be freed | |
340 | * | |
341 | * Releases ownership of a doorbell message range. Returns 0 if the | |
342 | * request has been satisfied. | |
343 | */ | |
344 | int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res) | |
345 | { | |
346 | int rc = release_resource(res); | |
347 | ||
348 | kfree(res); | |
349 | ||
350 | return rc; | |
351 | } | |
352 | ||
e5cabeb3 AB |
353 | /** |
354 | * rio_request_inb_pwrite - request inbound port-write message service | |
97ef6f74 | 355 | * @rdev: RIO device to which register inbound port-write callback routine |
e5cabeb3 AB |
356 | * @pwcback: Callback routine to execute when port-write is received |
357 | * | |
358 | * Binds a port-write callback function to the RapidIO device. | |
359 | * Returns 0 if the request has been satisfied. | |
360 | */ | |
361 | int rio_request_inb_pwrite(struct rio_dev *rdev, | |
362 | int (*pwcback)(struct rio_dev *rdev, union rio_pw_msg *msg, int step)) | |
363 | { | |
364 | int rc = 0; | |
365 | ||
366 | spin_lock(&rio_global_list_lock); | |
367 | if (rdev->pwcback != NULL) | |
368 | rc = -ENOMEM; | |
369 | else | |
370 | rdev->pwcback = pwcback; | |
371 | ||
372 | spin_unlock(&rio_global_list_lock); | |
373 | return rc; | |
374 | } | |
375 | EXPORT_SYMBOL_GPL(rio_request_inb_pwrite); | |
376 | ||
377 | /** | |
378 | * rio_release_inb_pwrite - release inbound port-write message service | |
379 | * @rdev: RIO device which registered for inbound port-write callback | |
380 | * | |
381 | * Removes callback from the rio_dev structure. Returns 0 if the request | |
382 | * has been satisfied. | |
383 | */ | |
384 | int rio_release_inb_pwrite(struct rio_dev *rdev) | |
385 | { | |
386 | int rc = -ENOMEM; | |
387 | ||
388 | spin_lock(&rio_global_list_lock); | |
389 | if (rdev->pwcback) { | |
390 | rdev->pwcback = NULL; | |
391 | rc = 0; | |
392 | } | |
393 | ||
394 | spin_unlock(&rio_global_list_lock); | |
395 | return rc; | |
396 | } | |
397 | EXPORT_SYMBOL_GPL(rio_release_inb_pwrite); | |
398 | ||
399 | /** | |
400 | * rio_mport_get_physefb - Helper function that returns register offset | |
401 | * for Physical Layer Extended Features Block. | |
97ef6f74 RD |
402 | * @port: Master port to issue transaction |
403 | * @local: Indicate a local master port or remote device access | |
404 | * @destid: Destination ID of the device | |
405 | * @hopcount: Number of switch hops to the device | |
e5cabeb3 AB |
406 | */ |
407 | u32 | |
408 | rio_mport_get_physefb(struct rio_mport *port, int local, | |
409 | u16 destid, u8 hopcount) | |
410 | { | |
411 | u32 ext_ftr_ptr; | |
412 | u32 ftr_header; | |
413 | ||
414 | ext_ftr_ptr = rio_mport_get_efb(port, local, destid, hopcount, 0); | |
415 | ||
416 | while (ext_ftr_ptr) { | |
417 | if (local) | |
418 | rio_local_read_config_32(port, ext_ftr_ptr, | |
419 | &ftr_header); | |
420 | else | |
421 | rio_mport_read_config_32(port, destid, hopcount, | |
422 | ext_ftr_ptr, &ftr_header); | |
423 | ||
424 | ftr_header = RIO_GET_BLOCK_ID(ftr_header); | |
425 | switch (ftr_header) { | |
426 | ||
427 | case RIO_EFB_SER_EP_ID_V13P: | |
428 | case RIO_EFB_SER_EP_REC_ID_V13P: | |
429 | case RIO_EFB_SER_EP_FREE_ID_V13P: | |
430 | case RIO_EFB_SER_EP_ID: | |
431 | case RIO_EFB_SER_EP_REC_ID: | |
432 | case RIO_EFB_SER_EP_FREE_ID: | |
433 | case RIO_EFB_SER_EP_FREC_ID: | |
434 | ||
435 | return ext_ftr_ptr; | |
436 | ||
437 | default: | |
438 | break; | |
439 | } | |
440 | ||
441 | ext_ftr_ptr = rio_mport_get_efb(port, local, destid, | |
442 | hopcount, ext_ftr_ptr); | |
443 | } | |
444 | ||
445 | return ext_ftr_ptr; | |
446 | } | |
447 | ||
448 | /** | |
449 | * rio_get_comptag - Begin or continue searching for a RIO device by component tag | |
97ef6f74 | 450 | * @comp_tag: RIO component tag to match |
e5cabeb3 AB |
451 | * @from: Previous RIO device found in search, or %NULL for new search |
452 | * | |
453 | * Iterates through the list of known RIO devices. If a RIO device is | |
454 | * found with a matching @comp_tag, a pointer to its device | |
455 | * structure is returned. Otherwise, %NULL is returned. A new search | |
456 | * is initiated by passing %NULL to the @from argument. Otherwise, if | |
457 | * @from is not %NULL, searches continue from next device on the global | |
458 | * list. | |
459 | */ | |
af84ca38 | 460 | struct rio_dev *rio_get_comptag(u32 comp_tag, struct rio_dev *from) |
e5cabeb3 AB |
461 | { |
462 | struct list_head *n; | |
463 | struct rio_dev *rdev; | |
464 | ||
e5cabeb3 AB |
465 | spin_lock(&rio_global_list_lock); |
466 | n = from ? from->global_list.next : rio_devices.next; | |
467 | ||
468 | while (n && (n != &rio_devices)) { | |
469 | rdev = rio_dev_g(n); | |
470 | if (rdev->comp_tag == comp_tag) | |
471 | goto exit; | |
472 | n = n->next; | |
473 | } | |
474 | rdev = NULL; | |
475 | exit: | |
476 | spin_unlock(&rio_global_list_lock); | |
477 | return rdev; | |
478 | } | |
479 | ||
480 | /** | |
481 | * rio_set_port_lockout - Sets/clears LOCKOUT bit (RIO EM 1.3) for a switch port. | |
482 | * @rdev: Pointer to RIO device control structure | |
483 | * @pnum: Switch port number to set LOCKOUT bit | |
484 | * @lock: Operation : set (=1) or clear (=0) | |
485 | */ | |
486 | int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock) | |
487 | { | |
e5cabeb3 AB |
488 | u32 regval; |
489 | ||
a93192a5 | 490 | rio_read_config_32(rdev, |
e5cabeb3 AB |
491 | rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum), |
492 | ®val); | |
493 | if (lock) | |
494 | regval |= RIO_PORT_N_CTL_LOCKOUT; | |
495 | else | |
496 | regval &= ~RIO_PORT_N_CTL_LOCKOUT; | |
497 | ||
a93192a5 | 498 | rio_write_config_32(rdev, |
e5cabeb3 AB |
499 | rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum), |
500 | regval); | |
501 | return 0; | |
502 | } | |
503 | ||
6429cd49 AB |
504 | /** |
505 | * rio_chk_dev_route - Validate route to the specified device. | |
506 | * @rdev: RIO device failed to respond | |
507 | * @nrdev: Last active device on the route to rdev | |
508 | * @npnum: nrdev's port number on the route to rdev | |
509 | * | |
510 | * Follows a route to the specified RIO device to determine the last available | |
511 | * device (and corresponding RIO port) on the route. | |
512 | */ | |
513 | static int | |
514 | rio_chk_dev_route(struct rio_dev *rdev, struct rio_dev **nrdev, int *npnum) | |
515 | { | |
516 | u32 result; | |
a93192a5 | 517 | int p_port, rc = -EIO; |
6429cd49 AB |
518 | struct rio_dev *prev = NULL; |
519 | ||
520 | /* Find switch with failed RIO link */ | |
521 | while (rdev->prev && (rdev->prev->pef & RIO_PEF_SWITCH)) { | |
522 | if (!rio_read_config_32(rdev->prev, RIO_DEV_ID_CAR, &result)) { | |
523 | prev = rdev->prev; | |
524 | break; | |
525 | } | |
526 | rdev = rdev->prev; | |
527 | } | |
528 | ||
529 | if (prev == NULL) | |
530 | goto err_out; | |
531 | ||
a93192a5 | 532 | p_port = prev->rswitch->route_table[rdev->destid]; |
6429cd49 | 533 | |
af84ca38 | 534 | if (p_port != RIO_INVALID_ROUTE) { |
6429cd49 AB |
535 | pr_debug("RIO: link failed on [%s]-P%d\n", |
536 | rio_name(prev), p_port); | |
537 | *nrdev = prev; | |
538 | *npnum = p_port; | |
539 | rc = 0; | |
540 | } else | |
af84ca38 | 541 | pr_debug("RIO: failed to trace route to %s\n", rio_name(rdev)); |
6429cd49 AB |
542 | err_out: |
543 | return rc; | |
544 | } | |
545 | ||
546 | /** | |
547 | * rio_mport_chk_dev_access - Validate access to the specified device. | |
548 | * @mport: Master port to send transactions | |
549 | * @destid: Device destination ID in network | |
550 | * @hopcount: Number of hops into the network | |
551 | */ | |
e274e0ed | 552 | int |
6429cd49 AB |
553 | rio_mport_chk_dev_access(struct rio_mport *mport, u16 destid, u8 hopcount) |
554 | { | |
555 | int i = 0; | |
556 | u32 tmp; | |
557 | ||
558 | while (rio_mport_read_config_32(mport, destid, hopcount, | |
559 | RIO_DEV_ID_CAR, &tmp)) { | |
560 | i++; | |
561 | if (i == RIO_MAX_CHK_RETRY) | |
562 | return -EIO; | |
563 | mdelay(1); | |
564 | } | |
565 | ||
566 | return 0; | |
567 | } | |
568 | ||
569 | /** | |
570 | * rio_chk_dev_access - Validate access to the specified device. | |
571 | * @rdev: Pointer to RIO device control structure | |
572 | */ | |
573 | static int rio_chk_dev_access(struct rio_dev *rdev) | |
574 | { | |
a93192a5 AB |
575 | return rio_mport_chk_dev_access(rdev->net->hport, |
576 | rdev->destid, rdev->hopcount); | |
6429cd49 AB |
577 | } |
578 | ||
dd5648c9 AB |
579 | /** |
580 | * rio_get_input_status - Sends a Link-Request/Input-Status control symbol and | |
581 | * returns link-response (if requested). | |
582 | * @rdev: RIO devive to issue Input-status command | |
583 | * @pnum: Device port number to issue the command | |
584 | * @lnkresp: Response from a link partner | |
585 | */ | |
586 | static int | |
587 | rio_get_input_status(struct rio_dev *rdev, int pnum, u32 *lnkresp) | |
588 | { | |
dd5648c9 AB |
589 | u32 regval; |
590 | int checkcount; | |
591 | ||
592 | if (lnkresp) { | |
593 | /* Read from link maintenance response register | |
594 | * to clear valid bit */ | |
a93192a5 | 595 | rio_read_config_32(rdev, |
dd5648c9 AB |
596 | rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum), |
597 | ®val); | |
598 | udelay(50); | |
599 | } | |
600 | ||
601 | /* Issue Input-status command */ | |
a93192a5 | 602 | rio_write_config_32(rdev, |
dd5648c9 AB |
603 | rdev->phys_efptr + RIO_PORT_N_MNT_REQ_CSR(pnum), |
604 | RIO_MNT_REQ_CMD_IS); | |
605 | ||
606 | /* Exit if the response is not expected */ | |
607 | if (lnkresp == NULL) | |
608 | return 0; | |
609 | ||
610 | checkcount = 3; | |
611 | while (checkcount--) { | |
612 | udelay(50); | |
a93192a5 | 613 | rio_read_config_32(rdev, |
dd5648c9 AB |
614 | rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum), |
615 | ®val); | |
616 | if (regval & RIO_PORT_N_MNT_RSP_RVAL) { | |
617 | *lnkresp = regval; | |
618 | return 0; | |
619 | } | |
620 | } | |
621 | ||
622 | return -EIO; | |
623 | } | |
624 | ||
625 | /** | |
626 | * rio_clr_err_stopped - Clears port Error-stopped states. | |
627 | * @rdev: Pointer to RIO device control structure | |
628 | * @pnum: Switch port number to clear errors | |
629 | * @err_status: port error status (if 0 reads register from device) | |
630 | */ | |
631 | static int rio_clr_err_stopped(struct rio_dev *rdev, u32 pnum, u32 err_status) | |
632 | { | |
dd5648c9 AB |
633 | struct rio_dev *nextdev = rdev->rswitch->nextdev[pnum]; |
634 | u32 regval; | |
635 | u32 far_ackid, far_linkstat, near_ackid; | |
636 | ||
637 | if (err_status == 0) | |
a93192a5 | 638 | rio_read_config_32(rdev, |
dd5648c9 AB |
639 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), |
640 | &err_status); | |
641 | ||
642 | if (err_status & RIO_PORT_N_ERR_STS_PW_OUT_ES) { | |
643 | pr_debug("RIO_EM: servicing Output Error-Stopped state\n"); | |
644 | /* | |
645 | * Send a Link-Request/Input-Status control symbol | |
646 | */ | |
647 | if (rio_get_input_status(rdev, pnum, ®val)) { | |
648 | pr_debug("RIO_EM: Input-status response timeout\n"); | |
649 | goto rd_err; | |
650 | } | |
651 | ||
652 | pr_debug("RIO_EM: SP%d Input-status response=0x%08x\n", | |
653 | pnum, regval); | |
654 | far_ackid = (regval & RIO_PORT_N_MNT_RSP_ASTAT) >> 5; | |
655 | far_linkstat = regval & RIO_PORT_N_MNT_RSP_LSTAT; | |
a93192a5 | 656 | rio_read_config_32(rdev, |
dd5648c9 AB |
657 | rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum), |
658 | ®val); | |
659 | pr_debug("RIO_EM: SP%d_ACK_STS_CSR=0x%08x\n", pnum, regval); | |
660 | near_ackid = (regval & RIO_PORT_N_ACK_INBOUND) >> 24; | |
661 | pr_debug("RIO_EM: SP%d far_ackID=0x%02x far_linkstat=0x%02x" \ | |
662 | " near_ackID=0x%02x\n", | |
663 | pnum, far_ackid, far_linkstat, near_ackid); | |
664 | ||
665 | /* | |
666 | * If required, synchronize ackIDs of near and | |
667 | * far sides. | |
668 | */ | |
669 | if ((far_ackid != ((regval & RIO_PORT_N_ACK_OUTSTAND) >> 8)) || | |
670 | (far_ackid != (regval & RIO_PORT_N_ACK_OUTBOUND))) { | |
671 | /* Align near outstanding/outbound ackIDs with | |
672 | * far inbound. | |
673 | */ | |
a93192a5 AB |
674 | rio_write_config_32(rdev, |
675 | rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum), | |
dd5648c9 AB |
676 | (near_ackid << 24) | |
677 | (far_ackid << 8) | far_ackid); | |
678 | /* Align far outstanding/outbound ackIDs with | |
679 | * near inbound. | |
680 | */ | |
681 | far_ackid++; | |
682 | if (nextdev) | |
683 | rio_write_config_32(nextdev, | |
684 | nextdev->phys_efptr + | |
685 | RIO_PORT_N_ACK_STS_CSR(RIO_GET_PORT_NUM(nextdev->swpinfo)), | |
686 | (far_ackid << 24) | | |
687 | (near_ackid << 8) | near_ackid); | |
688 | else | |
689 | pr_debug("RIO_EM: Invalid nextdev pointer (NULL)\n"); | |
690 | } | |
691 | rd_err: | |
a93192a5 | 692 | rio_read_config_32(rdev, |
dd5648c9 AB |
693 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), |
694 | &err_status); | |
695 | pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status); | |
696 | } | |
697 | ||
698 | if ((err_status & RIO_PORT_N_ERR_STS_PW_INP_ES) && nextdev) { | |
699 | pr_debug("RIO_EM: servicing Input Error-Stopped state\n"); | |
700 | rio_get_input_status(nextdev, | |
701 | RIO_GET_PORT_NUM(nextdev->swpinfo), NULL); | |
702 | udelay(50); | |
703 | ||
a93192a5 | 704 | rio_read_config_32(rdev, |
dd5648c9 AB |
705 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), |
706 | &err_status); | |
707 | pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status); | |
708 | } | |
709 | ||
710 | return (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES | | |
711 | RIO_PORT_N_ERR_STS_PW_INP_ES)) ? 1 : 0; | |
712 | } | |
713 | ||
e5cabeb3 AB |
714 | /** |
715 | * rio_inb_pwrite_handler - process inbound port-write message | |
716 | * @pw_msg: pointer to inbound port-write message | |
717 | * | |
718 | * Processes an inbound port-write message. Returns 0 if the request | |
719 | * has been satisfied. | |
720 | */ | |
721 | int rio_inb_pwrite_handler(union rio_pw_msg *pw_msg) | |
722 | { | |
723 | struct rio_dev *rdev; | |
dd5648c9 | 724 | u32 err_status, em_perrdet, em_ltlerrdet; |
e5cabeb3 AB |
725 | int rc, portnum; |
726 | ||
e6536927 | 727 | rdev = rio_get_comptag((pw_msg->em.comptag & RIO_CTAG_UDEVID), NULL); |
e5cabeb3 | 728 | if (rdev == NULL) { |
6429cd49 AB |
729 | /* Device removed or enumeration error */ |
730 | pr_debug("RIO: %s No matching device for CTag 0x%08x\n", | |
e5cabeb3 AB |
731 | __func__, pw_msg->em.comptag); |
732 | return -EIO; | |
733 | } | |
734 | ||
735 | pr_debug("RIO: Port-Write message from %s\n", rio_name(rdev)); | |
736 | ||
737 | #ifdef DEBUG_PW | |
738 | { | |
739 | u32 i; | |
740 | for (i = 0; i < RIO_PW_MSG_SIZE/sizeof(u32);) { | |
dd5648c9 | 741 | pr_debug("0x%02x: %08x %08x %08x %08x\n", |
e5cabeb3 AB |
742 | i*4, pw_msg->raw[i], pw_msg->raw[i + 1], |
743 | pw_msg->raw[i + 2], pw_msg->raw[i + 3]); | |
744 | i += 4; | |
745 | } | |
e5cabeb3 AB |
746 | } |
747 | #endif | |
748 | ||
749 | /* Call an external service function (if such is registered | |
750 | * for this device). This may be the service for endpoints that send | |
751 | * device-specific port-write messages. End-point messages expected | |
752 | * to be handled completely by EP specific device driver. | |
753 | * For switches rc==0 signals that no standard processing required. | |
754 | */ | |
755 | if (rdev->pwcback != NULL) { | |
756 | rc = rdev->pwcback(rdev, pw_msg, 0); | |
757 | if (rc == 0) | |
758 | return 0; | |
759 | } | |
760 | ||
6429cd49 AB |
761 | portnum = pw_msg->em.is_port & 0xFF; |
762 | ||
763 | /* Check if device and route to it are functional: | |
764 | * Sometimes devices may send PW message(s) just before being | |
765 | * powered down (or link being lost). | |
766 | */ | |
767 | if (rio_chk_dev_access(rdev)) { | |
768 | pr_debug("RIO: device access failed - get link partner\n"); | |
769 | /* Scan route to the device and identify failed link. | |
770 | * This will replace device and port reported in PW message. | |
771 | * PW message should not be used after this point. | |
772 | */ | |
773 | if (rio_chk_dev_route(rdev, &rdev, &portnum)) { | |
774 | pr_err("RIO: Route trace for %s failed\n", | |
775 | rio_name(rdev)); | |
776 | return -EIO; | |
777 | } | |
778 | pw_msg = NULL; | |
779 | } | |
780 | ||
e5cabeb3 AB |
781 | /* For End-point devices processing stops here */ |
782 | if (!(rdev->pef & RIO_PEF_SWITCH)) | |
783 | return 0; | |
784 | ||
785 | if (rdev->phys_efptr == 0) { | |
786 | pr_err("RIO_PW: Bad switch initialization for %s\n", | |
787 | rio_name(rdev)); | |
788 | return 0; | |
789 | } | |
790 | ||
e5cabeb3 AB |
791 | /* |
792 | * Process the port-write notification from switch | |
793 | */ | |
e5cabeb3 AB |
794 | if (rdev->rswitch->em_handle) |
795 | rdev->rswitch->em_handle(rdev, portnum); | |
796 | ||
a93192a5 | 797 | rio_read_config_32(rdev, |
e5cabeb3 AB |
798 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), |
799 | &err_status); | |
800 | pr_debug("RIO_PW: SP%d_ERR_STS_CSR=0x%08x\n", portnum, err_status); | |
801 | ||
dd5648c9 | 802 | if (err_status & RIO_PORT_N_ERR_STS_PORT_OK) { |
e5cabeb3 | 803 | |
dd5648c9 AB |
804 | if (!(rdev->rswitch->port_ok & (1 << portnum))) { |
805 | rdev->rswitch->port_ok |= (1 << portnum); | |
806 | rio_set_port_lockout(rdev, portnum, 0); | |
807 | /* Schedule Insertion Service */ | |
808 | pr_debug("RIO_PW: Device Insertion on [%s]-P%d\n", | |
809 | rio_name(rdev), portnum); | |
810 | } | |
e5cabeb3 | 811 | |
dd5648c9 AB |
812 | /* Clear error-stopped states (if reported). |
813 | * Depending on the link partner state, two attempts | |
814 | * may be needed for successful recovery. | |
815 | */ | |
816 | if (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES | | |
817 | RIO_PORT_N_ERR_STS_PW_INP_ES)) { | |
818 | if (rio_clr_err_stopped(rdev, portnum, err_status)) | |
819 | rio_clr_err_stopped(rdev, portnum, 0); | |
820 | } | |
821 | } else { /* if (err_status & RIO_PORT_N_ERR_STS_PORT_UNINIT) */ | |
e5cabeb3 | 822 | |
dd5648c9 | 823 | if (rdev->rswitch->port_ok & (1 << portnum)) { |
e5cabeb3 AB |
824 | rdev->rswitch->port_ok &= ~(1 << portnum); |
825 | rio_set_port_lockout(rdev, portnum, 1); | |
826 | ||
a93192a5 | 827 | rio_write_config_32(rdev, |
e5cabeb3 AB |
828 | rdev->phys_efptr + |
829 | RIO_PORT_N_ACK_STS_CSR(portnum), | |
830 | RIO_PORT_N_ACK_CLEAR); | |
831 | ||
832 | /* Schedule Extraction Service */ | |
833 | pr_debug("RIO_PW: Device Extraction on [%s]-P%d\n", | |
834 | rio_name(rdev), portnum); | |
835 | } | |
dd5648c9 | 836 | } |
e5cabeb3 | 837 | |
a93192a5 | 838 | rio_read_config_32(rdev, |
dd5648c9 AB |
839 | rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), &em_perrdet); |
840 | if (em_perrdet) { | |
841 | pr_debug("RIO_PW: RIO_EM_P%d_ERR_DETECT=0x%08x\n", | |
842 | portnum, em_perrdet); | |
843 | /* Clear EM Port N Error Detect CSR */ | |
a93192a5 | 844 | rio_write_config_32(rdev, |
dd5648c9 AB |
845 | rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), 0); |
846 | } | |
847 | ||
a93192a5 | 848 | rio_read_config_32(rdev, |
dd5648c9 AB |
849 | rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, &em_ltlerrdet); |
850 | if (em_ltlerrdet) { | |
851 | pr_debug("RIO_PW: RIO_EM_LTL_ERR_DETECT=0x%08x\n", | |
852 | em_ltlerrdet); | |
853 | /* Clear EM L/T Layer Error Detect CSR */ | |
a93192a5 | 854 | rio_write_config_32(rdev, |
dd5648c9 | 855 | rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, 0); |
e5cabeb3 AB |
856 | } |
857 | ||
388c45cc | 858 | /* Clear remaining error bits and Port-Write Pending bit */ |
a93192a5 | 859 | rio_write_config_32(rdev, |
dd5648c9 | 860 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), |
388c45cc | 861 | err_status); |
e5cabeb3 AB |
862 | |
863 | return 0; | |
864 | } | |
865 | EXPORT_SYMBOL_GPL(rio_inb_pwrite_handler); | |
866 | ||
867 | /** | |
868 | * rio_mport_get_efb - get pointer to next extended features block | |
869 | * @port: Master port to issue transaction | |
870 | * @local: Indicate a local master port or remote device access | |
871 | * @destid: Destination ID of the device | |
872 | * @hopcount: Number of switch hops to the device | |
873 | * @from: Offset of current Extended Feature block header (if 0 starts | |
874 | * from ExtFeaturePtr) | |
875 | */ | |
876 | u32 | |
877 | rio_mport_get_efb(struct rio_mport *port, int local, u16 destid, | |
878 | u8 hopcount, u32 from) | |
879 | { | |
880 | u32 reg_val; | |
881 | ||
882 | if (from == 0) { | |
883 | if (local) | |
884 | rio_local_read_config_32(port, RIO_ASM_INFO_CAR, | |
885 | ®_val); | |
886 | else | |
887 | rio_mport_read_config_32(port, destid, hopcount, | |
888 | RIO_ASM_INFO_CAR, ®_val); | |
889 | return reg_val & RIO_EXT_FTR_PTR_MASK; | |
890 | } else { | |
891 | if (local) | |
892 | rio_local_read_config_32(port, from, ®_val); | |
893 | else | |
894 | rio_mport_read_config_32(port, destid, hopcount, | |
895 | from, ®_val); | |
896 | return RIO_GET_BLOCK_ID(reg_val); | |
897 | } | |
898 | } | |
899 | ||
394b701c MP |
900 | /** |
901 | * rio_mport_get_feature - query for devices' extended features | |
902 | * @port: Master port to issue transaction | |
903 | * @local: Indicate a local master port or remote device access | |
904 | * @destid: Destination ID of the device | |
905 | * @hopcount: Number of switch hops to the device | |
906 | * @ftr: Extended feature code | |
907 | * | |
908 | * Tell if a device supports a given RapidIO capability. | |
909 | * Returns the offset of the requested extended feature | |
910 | * block within the device's RIO configuration space or | |
911 | * 0 in case the device does not support it. Possible | |
912 | * values for @ftr: | |
913 | * | |
914 | * %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices | |
915 | * | |
916 | * %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices | |
917 | * | |
918 | * %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices | |
919 | * | |
920 | * %RIO_EFB_SER_EP_ID LP/Serial EP Devices | |
921 | * | |
922 | * %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices | |
923 | * | |
924 | * %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices | |
925 | */ | |
926 | u32 | |
927 | rio_mport_get_feature(struct rio_mport * port, int local, u16 destid, | |
928 | u8 hopcount, int ftr) | |
929 | { | |
930 | u32 asm_info, ext_ftr_ptr, ftr_header; | |
931 | ||
932 | if (local) | |
933 | rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info); | |
934 | else | |
935 | rio_mport_read_config_32(port, destid, hopcount, | |
936 | RIO_ASM_INFO_CAR, &asm_info); | |
937 | ||
938 | ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK; | |
939 | ||
940 | while (ext_ftr_ptr) { | |
941 | if (local) | |
942 | rio_local_read_config_32(port, ext_ftr_ptr, | |
943 | &ftr_header); | |
944 | else | |
945 | rio_mport_read_config_32(port, destid, hopcount, | |
946 | ext_ftr_ptr, &ftr_header); | |
947 | if (RIO_GET_BLOCK_ID(ftr_header) == ftr) | |
948 | return ext_ftr_ptr; | |
949 | if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header))) | |
950 | break; | |
951 | } | |
952 | ||
953 | return 0; | |
954 | } | |
955 | ||
956 | /** | |
957 | * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did | |
958 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids | |
959 | * @did: RIO did to match or %RIO_ANY_ID to match all dids | |
960 | * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids | |
961 | * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids | |
962 | * @from: Previous RIO device found in search, or %NULL for new search | |
963 | * | |
964 | * Iterates through the list of known RIO devices. If a RIO device is | |
965 | * found with a matching @vid, @did, @asm_vid, @asm_did, the reference | |
966 | * count to the device is incrememted and a pointer to its device | |
967 | * structure is returned. Otherwise, %NULL is returned. A new search | |
968 | * is initiated by passing %NULL to the @from argument. Otherwise, if | |
969 | * @from is not %NULL, searches continue from next device on the global | |
970 | * list. The reference count for @from is always decremented if it is | |
971 | * not %NULL. | |
972 | */ | |
973 | struct rio_dev *rio_get_asm(u16 vid, u16 did, | |
974 | u16 asm_vid, u16 asm_did, struct rio_dev *from) | |
975 | { | |
976 | struct list_head *n; | |
977 | struct rio_dev *rdev; | |
978 | ||
979 | WARN_ON(in_interrupt()); | |
980 | spin_lock(&rio_global_list_lock); | |
981 | n = from ? from->global_list.next : rio_devices.next; | |
982 | ||
983 | while (n && (n != &rio_devices)) { | |
984 | rdev = rio_dev_g(n); | |
985 | if ((vid == RIO_ANY_ID || rdev->vid == vid) && | |
986 | (did == RIO_ANY_ID || rdev->did == did) && | |
987 | (asm_vid == RIO_ANY_ID || rdev->asm_vid == asm_vid) && | |
988 | (asm_did == RIO_ANY_ID || rdev->asm_did == asm_did)) | |
989 | goto exit; | |
990 | n = n->next; | |
991 | } | |
992 | rdev = NULL; | |
993 | exit: | |
994 | rio_dev_put(from); | |
995 | rdev = rio_dev_get(rdev); | |
996 | spin_unlock(&rio_global_list_lock); | |
997 | return rdev; | |
998 | } | |
999 | ||
1000 | /** | |
1001 | * rio_get_device - Begin or continue searching for a RIO device by vid/did | |
1002 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids | |
1003 | * @did: RIO did to match or %RIO_ANY_ID to match all dids | |
1004 | * @from: Previous RIO device found in search, or %NULL for new search | |
1005 | * | |
1006 | * Iterates through the list of known RIO devices. If a RIO device is | |
1007 | * found with a matching @vid and @did, the reference count to the | |
1008 | * device is incrememted and a pointer to its device structure is returned. | |
1009 | * Otherwise, %NULL is returned. A new search is initiated by passing %NULL | |
1010 | * to the @from argument. Otherwise, if @from is not %NULL, searches | |
1011 | * continue from next device on the global list. The reference count for | |
1012 | * @from is always decremented if it is not %NULL. | |
1013 | */ | |
1014 | struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from) | |
1015 | { | |
1016 | return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from); | |
1017 | } | |
1018 | ||
07590ff0 AB |
1019 | /** |
1020 | * rio_std_route_add_entry - Add switch route table entry using standard | |
1021 | * registers defined in RIO specification rev.1.3 | |
1022 | * @mport: Master port to issue transaction | |
1023 | * @destid: Destination ID of the device | |
1024 | * @hopcount: Number of switch hops to the device | |
1025 | * @table: routing table ID (global or port-specific) | |
1026 | * @route_destid: destID entry in the RT | |
1027 | * @route_port: destination port for specified destID | |
1028 | */ | |
1029 | int rio_std_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount, | |
1030 | u16 table, u16 route_destid, u8 route_port) | |
1031 | { | |
1032 | if (table == RIO_GLOBAL_TABLE) { | |
1033 | rio_mport_write_config_32(mport, destid, hopcount, | |
1034 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, | |
1035 | (u32)route_destid); | |
1036 | rio_mport_write_config_32(mport, destid, hopcount, | |
1037 | RIO_STD_RTE_CONF_PORT_SEL_CSR, | |
1038 | (u32)route_port); | |
1039 | } | |
e5cabeb3 | 1040 | |
07590ff0 AB |
1041 | udelay(10); |
1042 | return 0; | |
1043 | } | |
1044 | ||
1045 | /** | |
1046 | * rio_std_route_get_entry - Read switch route table entry (port number) | |
638c5945 | 1047 | * associated with specified destID using standard registers defined in RIO |
07590ff0 AB |
1048 | * specification rev.1.3 |
1049 | * @mport: Master port to issue transaction | |
1050 | * @destid: Destination ID of the device | |
1051 | * @hopcount: Number of switch hops to the device | |
1052 | * @table: routing table ID (global or port-specific) | |
1053 | * @route_destid: destID entry in the RT | |
1054 | * @route_port: returned destination port for specified destID | |
1055 | */ | |
1056 | int rio_std_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount, | |
1057 | u16 table, u16 route_destid, u8 *route_port) | |
1058 | { | |
1059 | u32 result; | |
1060 | ||
1061 | if (table == RIO_GLOBAL_TABLE) { | |
1062 | rio_mport_write_config_32(mport, destid, hopcount, | |
1063 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid); | |
1064 | rio_mport_read_config_32(mport, destid, hopcount, | |
1065 | RIO_STD_RTE_CONF_PORT_SEL_CSR, &result); | |
1066 | ||
1067 | *route_port = (u8)result; | |
1068 | } | |
1069 | ||
1070 | return 0; | |
1071 | } | |
1072 | ||
1073 | /** | |
1074 | * rio_std_route_clr_table - Clear swotch route table using standard registers | |
1075 | * defined in RIO specification rev.1.3. | |
1076 | * @mport: Master port to issue transaction | |
07590ff0 AB |
1077 | * @destid: Destination ID of the device |
1078 | * @hopcount: Number of switch hops to the device | |
1079 | * @table: routing table ID (global or port-specific) | |
1080 | */ | |
1081 | int rio_std_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount, | |
1082 | u16 table) | |
1083 | { | |
1084 | u32 max_destid = 0xff; | |
1085 | u32 i, pef, id_inc = 1, ext_cfg = 0; | |
1086 | u32 port_sel = RIO_INVALID_ROUTE; | |
1087 | ||
1088 | if (table == RIO_GLOBAL_TABLE) { | |
1089 | rio_mport_read_config_32(mport, destid, hopcount, | |
1090 | RIO_PEF_CAR, &pef); | |
1091 | ||
1092 | if (mport->sys_size) { | |
1093 | rio_mport_read_config_32(mport, destid, hopcount, | |
1094 | RIO_SWITCH_RT_LIMIT, | |
1095 | &max_destid); | |
1096 | max_destid &= RIO_RT_MAX_DESTID; | |
1097 | } | |
1098 | ||
1099 | if (pef & RIO_PEF_EXT_RT) { | |
1100 | ext_cfg = 0x80000000; | |
1101 | id_inc = 4; | |
1102 | port_sel = (RIO_INVALID_ROUTE << 24) | | |
1103 | (RIO_INVALID_ROUTE << 16) | | |
1104 | (RIO_INVALID_ROUTE << 8) | | |
1105 | RIO_INVALID_ROUTE; | |
1106 | } | |
1107 | ||
1108 | for (i = 0; i <= max_destid;) { | |
1109 | rio_mport_write_config_32(mport, destid, hopcount, | |
1110 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, | |
1111 | ext_cfg | i); | |
1112 | rio_mport_write_config_32(mport, destid, hopcount, | |
1113 | RIO_STD_RTE_CONF_PORT_SEL_CSR, | |
1114 | port_sel); | |
1115 | i += id_inc; | |
1116 | } | |
1117 | } | |
1118 | ||
1119 | udelay(10); | |
1120 | return 0; | |
1121 | } | |
1122 | ||
394b701c MP |
1123 | static void rio_fixup_device(struct rio_dev *dev) |
1124 | { | |
1125 | } | |
1126 | ||
1127 | static int __devinit rio_init(void) | |
1128 | { | |
1129 | struct rio_dev *dev = NULL; | |
1130 | ||
1131 | while ((dev = rio_get_device(RIO_ANY_ID, RIO_ANY_ID, dev)) != NULL) { | |
1132 | rio_fixup_device(dev); | |
1133 | } | |
1134 | return 0; | |
1135 | } | |
1136 | ||
37d33d15 | 1137 | int __devinit rio_init_mports(void) |
394b701c MP |
1138 | { |
1139 | int rc = 0; | |
1140 | struct rio_mport *port; | |
1141 | ||
1142 | list_for_each_entry(port, &rio_mports, node) { | |
1143 | if (!request_mem_region(port->iores.start, | |
88cf81fc | 1144 | resource_size(&port->iores), |
394b701c MP |
1145 | port->name)) { |
1146 | printk(KERN_ERR | |
5febf1cd | 1147 | "RIO: Error requesting master port region 0x%016llx-0x%016llx\n", |
88cf81fc | 1148 | (u64)port->iores.start, (u64)port->iores.end); |
394b701c MP |
1149 | rc = -ENOMEM; |
1150 | goto out; | |
1151 | } | |
1152 | ||
1153 | if (port->host_deviceid >= 0) | |
1154 | rio_enum_mport(port); | |
1155 | else | |
1156 | rio_disc_mport(port); | |
1157 | } | |
1158 | ||
2f809985 AB |
1159 | rio_init(); |
1160 | ||
394b701c MP |
1161 | out: |
1162 | return rc; | |
1163 | } | |
1164 | ||
2f809985 AB |
1165 | device_initcall_sync(rio_init_mports); |
1166 | ||
394b701c MP |
1167 | void rio_register_mport(struct rio_mport *port) |
1168 | { | |
1169 | list_add_tail(&port->node, &rio_mports); | |
1170 | } | |
1171 | ||
1172 | EXPORT_SYMBOL_GPL(rio_local_get_device_id); | |
1173 | EXPORT_SYMBOL_GPL(rio_get_device); | |
1174 | EXPORT_SYMBOL_GPL(rio_get_asm); | |
1175 | EXPORT_SYMBOL_GPL(rio_request_inb_dbell); | |
1176 | EXPORT_SYMBOL_GPL(rio_release_inb_dbell); | |
1177 | EXPORT_SYMBOL_GPL(rio_request_outb_dbell); | |
1178 | EXPORT_SYMBOL_GPL(rio_release_outb_dbell); | |
1179 | EXPORT_SYMBOL_GPL(rio_request_inb_mbox); | |
1180 | EXPORT_SYMBOL_GPL(rio_release_inb_mbox); | |
1181 | EXPORT_SYMBOL_GPL(rio_request_outb_mbox); | |
1182 | EXPORT_SYMBOL_GPL(rio_release_outb_mbox); |