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 | */ | |
446 | static struct rio_dev *rio_get_comptag(u32 comp_tag, struct rio_dev *from) | |
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 | ||
497 | /** | |
498 | * rio_inb_pwrite_handler - process inbound port-write message | |
499 | * @pw_msg: pointer to inbound port-write message | |
500 | * | |
501 | * Processes an inbound port-write message. Returns 0 if the request | |
502 | * has been satisfied. | |
503 | */ | |
504 | int rio_inb_pwrite_handler(union rio_pw_msg *pw_msg) | |
505 | { | |
506 | struct rio_dev *rdev; | |
507 | struct rio_mport *mport; | |
508 | u8 hopcount; | |
509 | u16 destid; | |
510 | u32 err_status; | |
511 | int rc, portnum; | |
512 | ||
513 | rdev = rio_get_comptag(pw_msg->em.comptag, NULL); | |
514 | if (rdev == NULL) { | |
515 | /* Someting bad here (probably enumeration error) */ | |
516 | pr_err("RIO: %s No matching device for CTag 0x%08x\n", | |
517 | __func__, pw_msg->em.comptag); | |
518 | return -EIO; | |
519 | } | |
520 | ||
521 | pr_debug("RIO: Port-Write message from %s\n", rio_name(rdev)); | |
522 | ||
523 | #ifdef DEBUG_PW | |
524 | { | |
525 | u32 i; | |
526 | for (i = 0; i < RIO_PW_MSG_SIZE/sizeof(u32);) { | |
527 | pr_debug("0x%02x: %08x %08x %08x %08x", | |
528 | i*4, pw_msg->raw[i], pw_msg->raw[i + 1], | |
529 | pw_msg->raw[i + 2], pw_msg->raw[i + 3]); | |
530 | i += 4; | |
531 | } | |
532 | pr_debug("\n"); | |
533 | } | |
534 | #endif | |
535 | ||
536 | /* Call an external service function (if such is registered | |
537 | * for this device). This may be the service for endpoints that send | |
538 | * device-specific port-write messages. End-point messages expected | |
539 | * to be handled completely by EP specific device driver. | |
540 | * For switches rc==0 signals that no standard processing required. | |
541 | */ | |
542 | if (rdev->pwcback != NULL) { | |
543 | rc = rdev->pwcback(rdev, pw_msg, 0); | |
544 | if (rc == 0) | |
545 | return 0; | |
546 | } | |
547 | ||
548 | /* For End-point devices processing stops here */ | |
549 | if (!(rdev->pef & RIO_PEF_SWITCH)) | |
550 | return 0; | |
551 | ||
552 | if (rdev->phys_efptr == 0) { | |
553 | pr_err("RIO_PW: Bad switch initialization for %s\n", | |
554 | rio_name(rdev)); | |
555 | return 0; | |
556 | } | |
557 | ||
558 | mport = rdev->net->hport; | |
559 | destid = rdev->rswitch->destid; | |
560 | hopcount = rdev->rswitch->hopcount; | |
561 | ||
562 | /* | |
563 | * Process the port-write notification from switch | |
564 | */ | |
565 | ||
566 | portnum = pw_msg->em.is_port & 0xFF; | |
567 | ||
568 | if (rdev->rswitch->em_handle) | |
569 | rdev->rswitch->em_handle(rdev, portnum); | |
570 | ||
571 | rio_mport_read_config_32(mport, destid, hopcount, | |
572 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), | |
573 | &err_status); | |
574 | pr_debug("RIO_PW: SP%d_ERR_STS_CSR=0x%08x\n", portnum, err_status); | |
575 | ||
576 | if (pw_msg->em.errdetect) { | |
577 | pr_debug("RIO_PW: RIO_EM_P%d_ERR_DETECT=0x%08x\n", | |
578 | portnum, pw_msg->em.errdetect); | |
579 | /* Clear EM Port N Error Detect CSR */ | |
580 | rio_mport_write_config_32(mport, destid, hopcount, | |
581 | rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), 0); | |
582 | } | |
583 | ||
584 | if (pw_msg->em.ltlerrdet) { | |
585 | pr_debug("RIO_PW: RIO_EM_LTL_ERR_DETECT=0x%08x\n", | |
586 | pw_msg->em.ltlerrdet); | |
587 | /* Clear EM L/T Layer Error Detect CSR */ | |
588 | rio_mport_write_config_32(mport, destid, hopcount, | |
589 | rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, 0); | |
590 | } | |
591 | ||
592 | /* Clear Port Errors */ | |
593 | rio_mport_write_config_32(mport, destid, hopcount, | |
594 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), | |
595 | err_status & RIO_PORT_N_ERR_STS_CLR_MASK); | |
596 | ||
597 | if (rdev->rswitch->port_ok & (1 << portnum)) { | |
598 | if (err_status & RIO_PORT_N_ERR_STS_PORT_UNINIT) { | |
599 | rdev->rswitch->port_ok &= ~(1 << portnum); | |
600 | rio_set_port_lockout(rdev, portnum, 1); | |
601 | ||
602 | rio_mport_write_config_32(mport, destid, hopcount, | |
603 | rdev->phys_efptr + | |
604 | RIO_PORT_N_ACK_STS_CSR(portnum), | |
605 | RIO_PORT_N_ACK_CLEAR); | |
606 | ||
607 | /* Schedule Extraction Service */ | |
608 | pr_debug("RIO_PW: Device Extraction on [%s]-P%d\n", | |
609 | rio_name(rdev), portnum); | |
610 | } | |
611 | } else { | |
612 | if (err_status & RIO_PORT_N_ERR_STS_PORT_OK) { | |
613 | rdev->rswitch->port_ok |= (1 << portnum); | |
614 | rio_set_port_lockout(rdev, portnum, 0); | |
615 | ||
616 | /* Schedule Insertion Service */ | |
617 | pr_debug("RIO_PW: Device Insertion on [%s]-P%d\n", | |
618 | rio_name(rdev), portnum); | |
619 | } | |
620 | } | |
621 | ||
622 | /* Clear Port-Write Pending bit */ | |
623 | rio_mport_write_config_32(mport, destid, hopcount, | |
624 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), | |
625 | RIO_PORT_N_ERR_STS_PW_PEND); | |
626 | ||
627 | return 0; | |
628 | } | |
629 | EXPORT_SYMBOL_GPL(rio_inb_pwrite_handler); | |
630 | ||
631 | /** | |
632 | * rio_mport_get_efb - get pointer to next extended features block | |
633 | * @port: Master port to issue transaction | |
634 | * @local: Indicate a local master port or remote device access | |
635 | * @destid: Destination ID of the device | |
636 | * @hopcount: Number of switch hops to the device | |
637 | * @from: Offset of current Extended Feature block header (if 0 starts | |
638 | * from ExtFeaturePtr) | |
639 | */ | |
640 | u32 | |
641 | rio_mport_get_efb(struct rio_mport *port, int local, u16 destid, | |
642 | u8 hopcount, u32 from) | |
643 | { | |
644 | u32 reg_val; | |
645 | ||
646 | if (from == 0) { | |
647 | if (local) | |
648 | rio_local_read_config_32(port, RIO_ASM_INFO_CAR, | |
649 | ®_val); | |
650 | else | |
651 | rio_mport_read_config_32(port, destid, hopcount, | |
652 | RIO_ASM_INFO_CAR, ®_val); | |
653 | return reg_val & RIO_EXT_FTR_PTR_MASK; | |
654 | } else { | |
655 | if (local) | |
656 | rio_local_read_config_32(port, from, ®_val); | |
657 | else | |
658 | rio_mport_read_config_32(port, destid, hopcount, | |
659 | from, ®_val); | |
660 | return RIO_GET_BLOCK_ID(reg_val); | |
661 | } | |
662 | } | |
663 | ||
394b701c MP |
664 | /** |
665 | * rio_mport_get_feature - query for devices' extended features | |
666 | * @port: Master port to issue transaction | |
667 | * @local: Indicate a local master port or remote device access | |
668 | * @destid: Destination ID of the device | |
669 | * @hopcount: Number of switch hops to the device | |
670 | * @ftr: Extended feature code | |
671 | * | |
672 | * Tell if a device supports a given RapidIO capability. | |
673 | * Returns the offset of the requested extended feature | |
674 | * block within the device's RIO configuration space or | |
675 | * 0 in case the device does not support it. Possible | |
676 | * values for @ftr: | |
677 | * | |
678 | * %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices | |
679 | * | |
680 | * %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices | |
681 | * | |
682 | * %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices | |
683 | * | |
684 | * %RIO_EFB_SER_EP_ID LP/Serial EP Devices | |
685 | * | |
686 | * %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices | |
687 | * | |
688 | * %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices | |
689 | */ | |
690 | u32 | |
691 | rio_mport_get_feature(struct rio_mport * port, int local, u16 destid, | |
692 | u8 hopcount, int ftr) | |
693 | { | |
694 | u32 asm_info, ext_ftr_ptr, ftr_header; | |
695 | ||
696 | if (local) | |
697 | rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info); | |
698 | else | |
699 | rio_mport_read_config_32(port, destid, hopcount, | |
700 | RIO_ASM_INFO_CAR, &asm_info); | |
701 | ||
702 | ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK; | |
703 | ||
704 | while (ext_ftr_ptr) { | |
705 | if (local) | |
706 | rio_local_read_config_32(port, ext_ftr_ptr, | |
707 | &ftr_header); | |
708 | else | |
709 | rio_mport_read_config_32(port, destid, hopcount, | |
710 | ext_ftr_ptr, &ftr_header); | |
711 | if (RIO_GET_BLOCK_ID(ftr_header) == ftr) | |
712 | return ext_ftr_ptr; | |
713 | if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header))) | |
714 | break; | |
715 | } | |
716 | ||
717 | return 0; | |
718 | } | |
719 | ||
720 | /** | |
721 | * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did | |
722 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids | |
723 | * @did: RIO did to match or %RIO_ANY_ID to match all dids | |
724 | * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids | |
725 | * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids | |
726 | * @from: Previous RIO device found in search, or %NULL for new search | |
727 | * | |
728 | * Iterates through the list of known RIO devices. If a RIO device is | |
729 | * found with a matching @vid, @did, @asm_vid, @asm_did, the reference | |
730 | * count to the device is incrememted and a pointer to its device | |
731 | * structure is returned. Otherwise, %NULL is returned. A new search | |
732 | * is initiated by passing %NULL to the @from argument. Otherwise, if | |
733 | * @from is not %NULL, searches continue from next device on the global | |
734 | * list. The reference count for @from is always decremented if it is | |
735 | * not %NULL. | |
736 | */ | |
737 | struct rio_dev *rio_get_asm(u16 vid, u16 did, | |
738 | u16 asm_vid, u16 asm_did, struct rio_dev *from) | |
739 | { | |
740 | struct list_head *n; | |
741 | struct rio_dev *rdev; | |
742 | ||
743 | WARN_ON(in_interrupt()); | |
744 | spin_lock(&rio_global_list_lock); | |
745 | n = from ? from->global_list.next : rio_devices.next; | |
746 | ||
747 | while (n && (n != &rio_devices)) { | |
748 | rdev = rio_dev_g(n); | |
749 | if ((vid == RIO_ANY_ID || rdev->vid == vid) && | |
750 | (did == RIO_ANY_ID || rdev->did == did) && | |
751 | (asm_vid == RIO_ANY_ID || rdev->asm_vid == asm_vid) && | |
752 | (asm_did == RIO_ANY_ID || rdev->asm_did == asm_did)) | |
753 | goto exit; | |
754 | n = n->next; | |
755 | } | |
756 | rdev = NULL; | |
757 | exit: | |
758 | rio_dev_put(from); | |
759 | rdev = rio_dev_get(rdev); | |
760 | spin_unlock(&rio_global_list_lock); | |
761 | return rdev; | |
762 | } | |
763 | ||
764 | /** | |
765 | * rio_get_device - Begin or continue searching for a RIO device by vid/did | |
766 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids | |
767 | * @did: RIO did to match or %RIO_ANY_ID to match all dids | |
768 | * @from: Previous RIO device found in search, or %NULL for new search | |
769 | * | |
770 | * Iterates through the list of known RIO devices. If a RIO device is | |
771 | * found with a matching @vid and @did, the reference count to the | |
772 | * device is incrememted and a pointer to its device structure is returned. | |
773 | * Otherwise, %NULL is returned. A new search is initiated by passing %NULL | |
774 | * to the @from argument. Otherwise, if @from is not %NULL, searches | |
775 | * continue from next device on the global list. The reference count for | |
776 | * @from is always decremented if it is not %NULL. | |
777 | */ | |
778 | struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from) | |
779 | { | |
780 | return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from); | |
781 | } | |
782 | ||
07590ff0 AB |
783 | /** |
784 | * rio_std_route_add_entry - Add switch route table entry using standard | |
785 | * registers defined in RIO specification rev.1.3 | |
786 | * @mport: Master port to issue transaction | |
787 | * @destid: Destination ID of the device | |
788 | * @hopcount: Number of switch hops to the device | |
789 | * @table: routing table ID (global or port-specific) | |
790 | * @route_destid: destID entry in the RT | |
791 | * @route_port: destination port for specified destID | |
792 | */ | |
793 | int rio_std_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount, | |
794 | u16 table, u16 route_destid, u8 route_port) | |
795 | { | |
796 | if (table == RIO_GLOBAL_TABLE) { | |
797 | rio_mport_write_config_32(mport, destid, hopcount, | |
798 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, | |
799 | (u32)route_destid); | |
800 | rio_mport_write_config_32(mport, destid, hopcount, | |
801 | RIO_STD_RTE_CONF_PORT_SEL_CSR, | |
802 | (u32)route_port); | |
803 | } | |
e5cabeb3 | 804 | |
07590ff0 AB |
805 | udelay(10); |
806 | return 0; | |
807 | } | |
808 | ||
809 | /** | |
810 | * rio_std_route_get_entry - Read switch route table entry (port number) | |
811 | * assosiated with specified destID using standard registers defined in RIO | |
812 | * specification rev.1.3 | |
813 | * @mport: Master port to issue transaction | |
814 | * @destid: Destination ID of the device | |
815 | * @hopcount: Number of switch hops to the device | |
816 | * @table: routing table ID (global or port-specific) | |
817 | * @route_destid: destID entry in the RT | |
818 | * @route_port: returned destination port for specified destID | |
819 | */ | |
820 | int rio_std_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount, | |
821 | u16 table, u16 route_destid, u8 *route_port) | |
822 | { | |
823 | u32 result; | |
824 | ||
825 | if (table == RIO_GLOBAL_TABLE) { | |
826 | rio_mport_write_config_32(mport, destid, hopcount, | |
827 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid); | |
828 | rio_mport_read_config_32(mport, destid, hopcount, | |
829 | RIO_STD_RTE_CONF_PORT_SEL_CSR, &result); | |
830 | ||
831 | *route_port = (u8)result; | |
832 | } | |
833 | ||
834 | return 0; | |
835 | } | |
836 | ||
837 | /** | |
838 | * rio_std_route_clr_table - Clear swotch route table using standard registers | |
839 | * defined in RIO specification rev.1.3. | |
840 | * @mport: Master port to issue transaction | |
07590ff0 AB |
841 | * @destid: Destination ID of the device |
842 | * @hopcount: Number of switch hops to the device | |
843 | * @table: routing table ID (global or port-specific) | |
844 | */ | |
845 | int rio_std_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount, | |
846 | u16 table) | |
847 | { | |
848 | u32 max_destid = 0xff; | |
849 | u32 i, pef, id_inc = 1, ext_cfg = 0; | |
850 | u32 port_sel = RIO_INVALID_ROUTE; | |
851 | ||
852 | if (table == RIO_GLOBAL_TABLE) { | |
853 | rio_mport_read_config_32(mport, destid, hopcount, | |
854 | RIO_PEF_CAR, &pef); | |
855 | ||
856 | if (mport->sys_size) { | |
857 | rio_mport_read_config_32(mport, destid, hopcount, | |
858 | RIO_SWITCH_RT_LIMIT, | |
859 | &max_destid); | |
860 | max_destid &= RIO_RT_MAX_DESTID; | |
861 | } | |
862 | ||
863 | if (pef & RIO_PEF_EXT_RT) { | |
864 | ext_cfg = 0x80000000; | |
865 | id_inc = 4; | |
866 | port_sel = (RIO_INVALID_ROUTE << 24) | | |
867 | (RIO_INVALID_ROUTE << 16) | | |
868 | (RIO_INVALID_ROUTE << 8) | | |
869 | RIO_INVALID_ROUTE; | |
870 | } | |
871 | ||
872 | for (i = 0; i <= max_destid;) { | |
873 | rio_mport_write_config_32(mport, destid, hopcount, | |
874 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, | |
875 | ext_cfg | i); | |
876 | rio_mport_write_config_32(mport, destid, hopcount, | |
877 | RIO_STD_RTE_CONF_PORT_SEL_CSR, | |
878 | port_sel); | |
879 | i += id_inc; | |
880 | } | |
881 | } | |
882 | ||
883 | udelay(10); | |
884 | return 0; | |
885 | } | |
886 | ||
394b701c MP |
887 | static void rio_fixup_device(struct rio_dev *dev) |
888 | { | |
889 | } | |
890 | ||
891 | static int __devinit rio_init(void) | |
892 | { | |
893 | struct rio_dev *dev = NULL; | |
894 | ||
895 | while ((dev = rio_get_device(RIO_ANY_ID, RIO_ANY_ID, dev)) != NULL) { | |
896 | rio_fixup_device(dev); | |
897 | } | |
898 | return 0; | |
899 | } | |
900 | ||
901 | device_initcall(rio_init); | |
902 | ||
37d33d15 | 903 | int __devinit rio_init_mports(void) |
394b701c MP |
904 | { |
905 | int rc = 0; | |
906 | struct rio_mport *port; | |
907 | ||
908 | list_for_each_entry(port, &rio_mports, node) { | |
909 | if (!request_mem_region(port->iores.start, | |
910 | port->iores.end - port->iores.start, | |
911 | port->name)) { | |
912 | printk(KERN_ERR | |
5febf1cd KG |
913 | "RIO: Error requesting master port region 0x%016llx-0x%016llx\n", |
914 | (u64)port->iores.start, (u64)port->iores.end - 1); | |
394b701c MP |
915 | rc = -ENOMEM; |
916 | goto out; | |
917 | } | |
918 | ||
919 | if (port->host_deviceid >= 0) | |
920 | rio_enum_mport(port); | |
921 | else | |
922 | rio_disc_mport(port); | |
923 | } | |
924 | ||
925 | out: | |
926 | return rc; | |
927 | } | |
928 | ||
929 | void rio_register_mport(struct rio_mport *port) | |
930 | { | |
931 | list_add_tail(&port->node, &rio_mports); | |
932 | } | |
933 | ||
934 | EXPORT_SYMBOL_GPL(rio_local_get_device_id); | |
935 | EXPORT_SYMBOL_GPL(rio_get_device); | |
936 | EXPORT_SYMBOL_GPL(rio_get_asm); | |
937 | EXPORT_SYMBOL_GPL(rio_request_inb_dbell); | |
938 | EXPORT_SYMBOL_GPL(rio_release_inb_dbell); | |
939 | EXPORT_SYMBOL_GPL(rio_request_outb_dbell); | |
940 | EXPORT_SYMBOL_GPL(rio_release_outb_dbell); | |
941 | EXPORT_SYMBOL_GPL(rio_request_inb_mbox); | |
942 | EXPORT_SYMBOL_GPL(rio_release_inb_mbox); | |
943 | EXPORT_SYMBOL_GPL(rio_request_outb_mbox); | |
944 | EXPORT_SYMBOL_GPL(rio_release_outb_mbox); |