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Matt Porter394b7012005-11-07 01:00:15 -08001/*
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 *
Alexandre Bouninee5cabeb2010-05-26 14:43:59 -07008 * Copyright 2009 Integrated Device Technology, Inc.
9 * Alex Bounine <alexandre.bounine@idt.com>
10 * - Added Port-Write/Error Management initialization and handling
11 *
Matt Porter394b7012005-11-07 01:00:15 -080012 * 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
Matt Porter394b7012005-11-07 01:00:15 -080018#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>
Tim Schmielaude259682006-01-08 01:02:05 -080029#include <linux/slab.h>
Kumar Gala5febf1c2008-01-23 05:53:47 -060030#include <linux/interrupt.h>
Matt Porter394b7012005-11-07 01:00:15 -080031
32#include "rio.h"
33
34static 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 */
44u16 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
Zhang Weie0423232008-04-18 13:33:42 -070050 return (RIO_GET_DID(port->sys_size, result));
Matt Porter394b7012005-11-07 01:00:15 -080051}
52
53/**
54 * rio_request_inb_mbox - request inbound mailbox service
55 * @mport: RIO master port from which to allocate the mailbox resource
Matt Porter6978bbc2005-11-07 01:00:20 -080056 * @dev_id: Device specific pointer to pass on event
Matt Porter394b7012005-11-07 01:00:15 -080057 * @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 */
64int rio_request_inb_mbox(struct rio_mport *mport,
Matt Porter6978bbc2005-11-07 01:00:20 -080065 void *dev_id,
Matt Porter394b7012005-11-07 01:00:15 -080066 int mbox,
67 int entries,
Matt Porter6978bbc2005-11-07 01:00:20 -080068 void (*minb) (struct rio_mport * mport, void *dev_id, int mbox,
Matt Porter394b7012005-11-07 01:00:15 -080069 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
Matt Porter6978bbc2005-11-07 01:00:20 -080091 rc = rio_open_inb_mbox(mport, dev_id, mbox, entries);
Matt Porter394b7012005-11-07 01:00:15 -080092 } 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 */
107int 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
Matt Porter6978bbc2005-11-07 01:00:20 -0800118 * @dev_id: Device specific pointer to pass on event
Matt Porter394b7012005-11-07 01:00:15 -0800119 * @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 */
126int rio_request_outb_mbox(struct rio_mport *mport,
Matt Porter6978bbc2005-11-07 01:00:20 -0800127 void *dev_id,
Matt Porter394b7012005-11-07 01:00:15 -0800128 int mbox,
129 int entries,
Matt Porter6978bbc2005-11-07 01:00:20 -0800130 void (*moutb) (struct rio_mport * mport, void *dev_id, int mbox, int slot))
Matt Porter394b7012005-11-07 01:00:15 -0800131{
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
Matt Porter6978bbc2005-11-07 01:00:20 -0800152 rc = rio_open_outb_mbox(mport, dev_id, mbox, entries);
Matt Porter394b7012005-11-07 01:00:15 -0800153 } 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 */
168int 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
Matt Porter6978bbc2005-11-07 01:00:20 -0800179 * @dev_id: Device specific pointer to pass on event
Matt Porter394b7012005-11-07 01:00:15 -0800180 * @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 */
187static int
Matt Porter6978bbc2005-11-07 01:00:20 -0800188rio_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,
Matt Porter394b7012005-11-07 01:00:15 -0800190 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;
Matt Porter6978bbc2005-11-07 01:00:20 -0800202 dbell->dev_id = dev_id;
Matt Porter394b7012005-11-07 01:00:15 -0800203
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
Matt Porter6978bbc2005-11-07 01:00:20 -0800213 * @dev_id: Device specific pointer to pass on event
Matt Porter394b7012005-11-07 01:00:15 -0800214 * @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 */
222int rio_request_inb_dbell(struct rio_mport *mport,
Matt Porter6978bbc2005-11-07 01:00:20 -0800223 void *dev_id,
Matt Porter394b7012005-11-07 01:00:15 -0800224 u16 start,
225 u16 end,
Matt Porter6978bbc2005-11-07 01:00:20 -0800226 void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src,
Matt Porter394b7012005-11-07 01:00:15 -0800227 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 */
Matt Porter6978bbc2005-11-07 01:00:20 -0800245 rc = rio_setup_inb_dbell(mport, dev_id, res, dinb);
Matt Porter394b7012005-11-07 01:00:15 -0800246 } 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 */
263int 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 */
303struct 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 */
330int 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
339/**
Alexandre Bouninee5cabeb2010-05-26 14:43:59 -0700340 * rio_request_inb_pwrite - request inbound port-write message service
Randy Dunlap97ef6f72010-05-28 15:08:08 -0700341 * @rdev: RIO device to which register inbound port-write callback routine
Alexandre Bouninee5cabeb2010-05-26 14:43:59 -0700342 * @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 */
347int 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}
361EXPORT_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 */
370int 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}
383EXPORT_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.
Randy Dunlap97ef6f72010-05-28 15:08:08 -0700388 * @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
Alexandre Bouninee5cabeb2010-05-26 14:43:59 -0700392 */
393u32
394rio_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
Randy Dunlap97ef6f72010-05-28 15:08:08 -0700436 * @comp_tag: RIO component tag to match
Alexandre Bouninee5cabeb2010-05-26 14:43:59 -0700437 * @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 */
446static 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
Alexandre Bouninee5cabeb2010-05-26 14:43:59 -0700451 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;
461exit:
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 */
472int 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 &regval);
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 */
504int 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}
629EXPORT_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 */
640u32
641rio_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 &reg_val);
650 else
651 rio_mport_read_config_32(port, destid, hopcount,
652 RIO_ASM_INFO_CAR, &reg_val);
653 return reg_val & RIO_EXT_FTR_PTR_MASK;
654 } else {
655 if (local)
656 rio_local_read_config_32(port, from, &reg_val);
657 else
658 rio_mport_read_config_32(port, destid, hopcount,
659 from, &reg_val);
660 return RIO_GET_BLOCK_ID(reg_val);
661 }
662}
663
664/**
Matt Porter394b7012005-11-07 01:00:15 -0800665 * 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 */
690u32
691rio_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 */
737struct 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 */
778struct 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
Alexandre Bounine07590ff2010-05-26 14:43:57 -0700783/**
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 */
793int 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 }
Alexandre Bouninee5cabeb2010-05-26 14:43:59 -0700804
Alexandre Bounine07590ff2010-05-26 14:43:57 -0700805 udelay(10);
806 return 0;
807}
808
809/**
810 * rio_std_route_get_entry - Read switch route table entry (port number)
Uwe Kleine-König638c5942010-06-11 12:16:58 +0200811 * associated with specified destID using standard registers defined in RIO
Alexandre Bounine07590ff2010-05-26 14:43:57 -0700812 * 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 */
820int 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
Alexandre Bounine07590ff2010-05-26 14:43:57 -0700841 * @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 */
845int 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
Matt Porter394b7012005-11-07 01:00:15 -0800887static void rio_fixup_device(struct rio_dev *dev)
888{
889}
890
891static 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
901device_initcall(rio_init);
902
Al Viro37d33d12008-11-22 17:36:24 +0000903int __devinit rio_init_mports(void)
Matt Porter394b7012005-11-07 01:00:15 -0800904{
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
Kumar Gala5febf1c2008-01-23 05:53:47 -0600913 "RIO: Error requesting master port region 0x%016llx-0x%016llx\n",
914 (u64)port->iores.start, (u64)port->iores.end - 1);
Matt Porter394b7012005-11-07 01:00:15 -0800915 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
929void rio_register_mport(struct rio_mport *port)
930{
931 list_add_tail(&port->node, &rio_mports);
932}
933
934EXPORT_SYMBOL_GPL(rio_local_get_device_id);
935EXPORT_SYMBOL_GPL(rio_get_device);
936EXPORT_SYMBOL_GPL(rio_get_asm);
937EXPORT_SYMBOL_GPL(rio_request_inb_dbell);
938EXPORT_SYMBOL_GPL(rio_release_inb_dbell);
939EXPORT_SYMBOL_GPL(rio_request_outb_dbell);
940EXPORT_SYMBOL_GPL(rio_release_outb_dbell);
941EXPORT_SYMBOL_GPL(rio_request_inb_mbox);
942EXPORT_SYMBOL_GPL(rio_release_inb_mbox);
943EXPORT_SYMBOL_GPL(rio_request_outb_mbox);
944EXPORT_SYMBOL_GPL(rio_release_outb_mbox);