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rapidio: use msleep in discovery wait
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / rapidio / rio.c
CommitLineData
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
34static LIST_HEAD(rio_mports);
569fccb6 35static unsigned char next_portid;
da1589f0 36static DEFINE_SPINLOCK(rio_mmap_lock);
394b701c
MP		 37
38/**
39 * rio_local_get_device_id - Get the base/extended device id for a port
40 * @port: RIO master port from which to get the deviceid
41 *
42 * Reads the base/extended device id from the local device
43 * implementing the master port. Returns the 8/16-bit device
44 * id.
45 */
46u16 rio_local_get_device_id(struct rio_mport *port)
47{
48 u32 result;
49
50 rio_local_read_config_32(port, RIO_DID_CSR, &result);
51
e0423236 52 return (RIO_GET_DID(port->sys_size, result));
394b701c
MP		 53}
54
55/**
56 * rio_request_inb_mbox - request inbound mailbox service
57 * @mport: RIO master port from which to allocate the mailbox resource
6978bbc0 58 * @dev_id: Device specific pointer to pass on event
394b701c
MP		 59 * @mbox: Mailbox number to claim
60 * @entries: Number of entries in inbound mailbox queue
61 * @minb: Callback to execute when inbound message is received
62 *
63 * Requests ownership of an inbound mailbox resource and binds
64 * a callback function to the resource. Returns %0 on success.
65 */
66int rio_request_inb_mbox(struct rio_mport *mport,
6978bbc0 67 void *dev_id,
394b701c
MP		 68 int mbox,
69 int entries,
6978bbc0 70 void (*minb) (struct rio_mport * mport, void *dev_id, int mbox,
394b701c
MP		 71 int slot))
72{
f8f06269
AB		 73 int rc = -ENOSYS;
74 struct resource *res;
394b701c 75
f8f06269
AB		 76 if (mport->ops->open_inb_mbox == NULL)
77 goto out;
78
79 res = kmalloc(sizeof(struct resource), GFP_KERNEL);
394b701c
MP		 80
81 if (res) {
82 rio_init_mbox_res(res, mbox, mbox);
83
84 /* Make sure this mailbox isn't in use */
85 if ((rc =
86 request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE],
87 res)) < 0) {
88 kfree(res);
89 goto out;
90 }
91
92 mport->inb_msg[mbox].res = res;
93
94 /* Hook the inbound message callback */
95 mport->inb_msg[mbox].mcback = minb;
96
f8f06269 97 rc = mport->ops->open_inb_mbox(mport, dev_id, mbox, entries);
394b701c
MP		 98 } else
99 rc = -ENOMEM;
100
101 out:
102 return rc;
103}
104
105/**
106 * rio_release_inb_mbox - release inbound mailbox message service
107 * @mport: RIO master port from which to release the mailbox resource
108 * @mbox: Mailbox number to release
109 *
110 * Releases ownership of an inbound mailbox resource. Returns 0
111 * if the request has been satisfied.
112 */
113int rio_release_inb_mbox(struct rio_mport *mport, int mbox)
114{
f8f06269
AB		 115 if (mport->ops->close_inb_mbox) {
116 mport->ops->close_inb_mbox(mport, mbox);
394b701c 117
f8f06269
AB		 118 /* Release the mailbox resource */
119 return release_resource(mport->inb_msg[mbox].res);
120 } else
121 return -ENOSYS;
394b701c
MP		 122}
123
124/**
125 * rio_request_outb_mbox - request outbound mailbox service
126 * @mport: RIO master port from which to allocate the mailbox resource
6978bbc0 127 * @dev_id: Device specific pointer to pass on event
394b701c
MP		 128 * @mbox: Mailbox number to claim
129 * @entries: Number of entries in outbound mailbox queue
130 * @moutb: Callback to execute when outbound message is sent
131 *
132 * Requests ownership of an outbound mailbox resource and binds
133 * a callback function to the resource. Returns 0 on success.
134 */
135int rio_request_outb_mbox(struct rio_mport *mport,
6978bbc0 136 void *dev_id,
394b701c
MP		 137 int mbox,
138 int entries,
6978bbc0 139 void (*moutb) (struct rio_mport * mport, void *dev_id, int mbox, int slot))
394b701c 140{
f8f06269
AB		 141 int rc = -ENOSYS;
142 struct resource *res;
394b701c 143
f8f06269
AB		 144 if (mport->ops->open_outb_mbox == NULL)
145 goto out;
146
147 res = kmalloc(sizeof(struct resource), GFP_KERNEL);
394b701c
MP		 148
149 if (res) {
150 rio_init_mbox_res(res, mbox, mbox);
151
152 /* Make sure this outbound mailbox isn't in use */
153 if ((rc =
154 request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE],
155 res)) < 0) {
156 kfree(res);
157 goto out;
158 }
159
160 mport->outb_msg[mbox].res = res;
161
162 /* Hook the inbound message callback */
163 mport->outb_msg[mbox].mcback = moutb;
164
f8f06269 165 rc = mport->ops->open_outb_mbox(mport, dev_id, mbox, entries);
394b701c
MP		 166 } else
167 rc = -ENOMEM;
168
169 out:
170 return rc;
171}
172
173/**
174 * rio_release_outb_mbox - release outbound mailbox message service
175 * @mport: RIO master port from which to release the mailbox resource
176 * @mbox: Mailbox number to release
177 *
178 * Releases ownership of an inbound mailbox resource. Returns 0
179 * if the request has been satisfied.
180 */
181int rio_release_outb_mbox(struct rio_mport *mport, int mbox)
182{
f8f06269
AB		 183 if (mport->ops->close_outb_mbox) {
184 mport->ops->close_outb_mbox(mport, mbox);
394b701c 185
f8f06269
AB		 186 /* Release the mailbox resource */
187 return release_resource(mport->outb_msg[mbox].res);
188 } else
189 return -ENOSYS;
394b701c
MP		 190}
191
192/**
193 * rio_setup_inb_dbell - bind inbound doorbell callback
194 * @mport: RIO master port to bind the doorbell callback
6978bbc0 195 * @dev_id: Device specific pointer to pass on event
394b701c
MP		 196 * @res: Doorbell message resource
197 * @dinb: Callback to execute when doorbell is received
198 *
199 * Adds a doorbell resource/callback pair into a port's
200 * doorbell event list. Returns 0 if the request has been
201 * satisfied.
202 */
203static int
6978bbc0
MP		 204rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res,
205 void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst,
394b701c
MP		 206 u16 info))
207{
208 int rc = 0;
209 struct rio_dbell *dbell;
210
211 if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) {
212 rc = -ENOMEM;
213 goto out;
214 }
215
216 dbell->res = res;
217 dbell->dinb = dinb;
6978bbc0 218 dbell->dev_id = dev_id;
394b701c
MP		 219
220 list_add_tail(&dbell->node, &mport->dbells);
221
222 out:
223 return rc;
224}
225
226/**
227 * rio_request_inb_dbell - request inbound doorbell message service
228 * @mport: RIO master port from which to allocate the doorbell resource
6978bbc0 229 * @dev_id: Device specific pointer to pass on event
394b701c
MP		 230 * @start: Doorbell info range start
231 * @end: Doorbell info range end
232 * @dinb: Callback to execute when doorbell is received
233 *
234 * Requests ownership of an inbound doorbell resource and binds
235 * a callback function to the resource. Returns 0 if the request
236 * has been satisfied.
237 */
238int rio_request_inb_dbell(struct rio_mport *mport,
6978bbc0 239 void *dev_id,
394b701c
MP		 240 u16 start,
241 u16 end,
6978bbc0 242 void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src,
394b701c
MP		 243 u16 dst, u16 info))
244{
245 int rc = 0;
246
247 struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
248
249 if (res) {
250 rio_init_dbell_res(res, start, end);
251
252 /* Make sure these doorbells aren't in use */
253 if ((rc =
254 request_resource(&mport->riores[RIO_DOORBELL_RESOURCE],
255 res)) < 0) {
256 kfree(res);
257 goto out;
258 }
259
260 /* Hook the doorbell callback */
6978bbc0 261 rc = rio_setup_inb_dbell(mport, dev_id, res, dinb);
394b701c
MP		 262 } else
263 rc = -ENOMEM;
264
265 out:
266 return rc;
267}
268
269/**
270 * rio_release_inb_dbell - release inbound doorbell message service
271 * @mport: RIO master port from which to release the doorbell resource
272 * @start: Doorbell info range start
273 * @end: Doorbell info range end
274 *
275 * Releases ownership of an inbound doorbell resource and removes
276 * callback from the doorbell event list. Returns 0 if the request
277 * has been satisfied.
278 */
279int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end)
280{
281 int rc = 0, found = 0;
282 struct rio_dbell *dbell;
283
284 list_for_each_entry(dbell, &mport->dbells, node) {
285 if ((dbell->res->start == start) && (dbell->res->end == end)) {
286 found = 1;
287 break;
288 }
289 }
290
291 /* If we can't find an exact match, fail */
292 if (!found) {
293 rc = -EINVAL;
294 goto out;
295 }
296
297 /* Delete from list */
298 list_del(&dbell->node);
299
300 /* Release the doorbell resource */
301 rc = release_resource(dbell->res);
302
303 /* Free the doorbell event */
304 kfree(dbell);
305
306 out:
307 return rc;
308}
309
310/**
311 * rio_request_outb_dbell - request outbound doorbell message range
312 * @rdev: RIO device from which to allocate the doorbell resource
313 * @start: Doorbell message range start
314 * @end: Doorbell message range end
315 *
316 * Requests ownership of a doorbell message range. Returns a resource
317 * if the request has been satisfied or %NULL on failure.
318 */
319struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start,
320 u16 end)
321{
322 struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
323
324 if (res) {
325 rio_init_dbell_res(res, start, end);
326
327 /* Make sure these doorbells aren't in use */
328 if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res)
329 < 0) {
330 kfree(res);
331 res = NULL;
332 }
333 }
334
335 return res;
336}
337
338/**
339 * rio_release_outb_dbell - release outbound doorbell message range
340 * @rdev: RIO device from which to release the doorbell resource
341 * @res: Doorbell resource to be freed
342 *
343 * Releases ownership of a doorbell message range. Returns 0 if the
344 * request has been satisfied.
345 */
346int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res)
347{
348 int rc = release_resource(res);
349
350 kfree(res);
351
352 return rc;
353}
354
e5cabeb3
AB		 355/**
356 * rio_request_inb_pwrite - request inbound port-write message service
97ef6f74 357 * @rdev: RIO device to which register inbound port-write callback routine
e5cabeb3
AB		 358 * @pwcback: Callback routine to execute when port-write is received
359 *
360 * Binds a port-write callback function to the RapidIO device.
361 * Returns 0 if the request has been satisfied.
362 */
363int rio_request_inb_pwrite(struct rio_dev *rdev,
364 int (*pwcback)(struct rio_dev *rdev, union rio_pw_msg *msg, int step))
365{
366 int rc = 0;
367
368 spin_lock(&rio_global_list_lock);
369 if (rdev->pwcback != NULL)
370 rc = -ENOMEM;
371 else
372 rdev->pwcback = pwcback;
373
374 spin_unlock(&rio_global_list_lock);
375 return rc;
376}
377EXPORT_SYMBOL_GPL(rio_request_inb_pwrite);
378
379/**
380 * rio_release_inb_pwrite - release inbound port-write message service
381 * @rdev: RIO device which registered for inbound port-write callback
382 *
383 * Removes callback from the rio_dev structure. Returns 0 if the request
384 * has been satisfied.
385 */
386int rio_release_inb_pwrite(struct rio_dev *rdev)
387{
388 int rc = -ENOMEM;
389
390 spin_lock(&rio_global_list_lock);
391 if (rdev->pwcback) {
392 rdev->pwcback = NULL;
393 rc = 0;
394 }
395
396 spin_unlock(&rio_global_list_lock);
397 return rc;
398}
399EXPORT_SYMBOL_GPL(rio_release_inb_pwrite);
400
da1589f0
AB		 401/**
402 * rio_map_inb_region -- Map inbound memory region.
403 * @mport: Master port.
404 * @lstart: physical address of memory region to be mapped
405 * @rbase: RIO base address assigned to this window
406 * @size: Size of the memory region
407 * @rflags: Flags for mapping.
408 *
409 * Return: 0 -- Success.
410 *
411 * This function will create the mapping from RIO space to local memory.
412 */
413int rio_map_inb_region(struct rio_mport *mport, dma_addr_t local,
414 u64 rbase, u32 size, u32 rflags)
415{
416 int rc = 0;
417 unsigned long flags;
418
419 if (!mport->ops->map_inb)
420 return -1;
421 spin_lock_irqsave(&rio_mmap_lock, flags);
422 rc = mport->ops->map_inb(mport, local, rbase, size, rflags);
423 spin_unlock_irqrestore(&rio_mmap_lock, flags);
424 return rc;
425}
426EXPORT_SYMBOL_GPL(rio_map_inb_region);
427
428/**
429 * rio_unmap_inb_region -- Unmap the inbound memory region
430 * @mport: Master port
431 * @lstart: physical address of memory region to be unmapped
432 */
433void rio_unmap_inb_region(struct rio_mport *mport, dma_addr_t lstart)
434{
435 unsigned long flags;
436 if (!mport->ops->unmap_inb)
437 return;
438 spin_lock_irqsave(&rio_mmap_lock, flags);
439 mport->ops->unmap_inb(mport, lstart);
440 spin_unlock_irqrestore(&rio_mmap_lock, flags);
441}
442EXPORT_SYMBOL_GPL(rio_unmap_inb_region);
443
e5cabeb3
AB		 444/**
445 * rio_mport_get_physefb - Helper function that returns register offset
446 * for Physical Layer Extended Features Block.
97ef6f74
RD		 447 * @port: Master port to issue transaction
448 * @local: Indicate a local master port or remote device access
449 * @destid: Destination ID of the device
450 * @hopcount: Number of switch hops to the device
e5cabeb3
AB		 451 */
452u32
453rio_mport_get_physefb(struct rio_mport *port, int local,
454 u16 destid, u8 hopcount)
455{
456 u32 ext_ftr_ptr;
457 u32 ftr_header;
458
459 ext_ftr_ptr = rio_mport_get_efb(port, local, destid, hopcount, 0);
460
461 while (ext_ftr_ptr) {
462 if (local)
463 rio_local_read_config_32(port, ext_ftr_ptr,
464 &ftr_header);
465 else
466 rio_mport_read_config_32(port, destid, hopcount,
467 ext_ftr_ptr, &ftr_header);
468
469 ftr_header = RIO_GET_BLOCK_ID(ftr_header);
470 switch (ftr_header) {
471
472 case RIO_EFB_SER_EP_ID_V13P:
473 case RIO_EFB_SER_EP_REC_ID_V13P:
474 case RIO_EFB_SER_EP_FREE_ID_V13P:
475 case RIO_EFB_SER_EP_ID:
476 case RIO_EFB_SER_EP_REC_ID:
477 case RIO_EFB_SER_EP_FREE_ID:
478 case RIO_EFB_SER_EP_FREC_ID:
479
480 return ext_ftr_ptr;
481
482 default:
483 break;
484 }
485
486 ext_ftr_ptr = rio_mport_get_efb(port, local, destid,
487 hopcount, ext_ftr_ptr);
488 }
489
490 return ext_ftr_ptr;
491}
492
493/**
494 * rio_get_comptag - Begin or continue searching for a RIO device by component tag
97ef6f74 495 * @comp_tag: RIO component tag to match
e5cabeb3
AB		 496 * @from: Previous RIO device found in search, or %NULL for new search
497 *
498 * Iterates through the list of known RIO devices. If a RIO device is
499 * found with a matching @comp_tag, a pointer to its device
500 * structure is returned. Otherwise, %NULL is returned. A new search
501 * is initiated by passing %NULL to the @from argument. Otherwise, if
502 * @from is not %NULL, searches continue from next device on the global
503 * list.
504 */
af84ca38 505struct rio_dev *rio_get_comptag(u32 comp_tag, struct rio_dev *from)
e5cabeb3
AB		 506{
507 struct list_head *n;
508 struct rio_dev *rdev;
509
e5cabeb3
AB		 510 spin_lock(&rio_global_list_lock);
511 n = from ? from->global_list.next : rio_devices.next;
512
513 while (n && (n != &rio_devices)) {
514 rdev = rio_dev_g(n);
515 if (rdev->comp_tag == comp_tag)
516 goto exit;
517 n = n->next;
518 }
519 rdev = NULL;
520exit:
521 spin_unlock(&rio_global_list_lock);
522 return rdev;
523}
524
525/**
526 * rio_set_port_lockout - Sets/clears LOCKOUT bit (RIO EM 1.3) for a switch port.
527 * @rdev: Pointer to RIO device control structure
528 * @pnum: Switch port number to set LOCKOUT bit
529 * @lock: Operation : set (=1) or clear (=0)
530 */
531int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock)
532{
e5cabeb3
AB		 533 u32 regval;
534
a93192a5 535 rio_read_config_32(rdev,
e5cabeb3
AB		 536 rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum),
537 &regval);
538 if (lock)
539 regval |= RIO_PORT_N_CTL_LOCKOUT;
540 else
541 regval &= ~RIO_PORT_N_CTL_LOCKOUT;
542
a93192a5 543 rio_write_config_32(rdev,
e5cabeb3
AB		 544 rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum),
545 regval);
546 return 0;
547}
548
6429cd49
AB		 549/**
550 * rio_chk_dev_route - Validate route to the specified device.
551 * @rdev: RIO device failed to respond
552 * @nrdev: Last active device on the route to rdev
553 * @npnum: nrdev's port number on the route to rdev
554 *
555 * Follows a route to the specified RIO device to determine the last available
556 * device (and corresponding RIO port) on the route.
557 */
558static int
559rio_chk_dev_route(struct rio_dev *rdev, struct rio_dev **nrdev, int *npnum)
560{
561 u32 result;
a93192a5 562 int p_port, rc = -EIO;
6429cd49
AB		 563 struct rio_dev *prev = NULL;
564
565 /* Find switch with failed RIO link */
566 while (rdev->prev && (rdev->prev->pef & RIO_PEF_SWITCH)) {
567 if (!rio_read_config_32(rdev->prev, RIO_DEV_ID_CAR, &result)) {
568 prev = rdev->prev;
569 break;
570 }
571 rdev = rdev->prev;
572 }
573
574 if (prev == NULL)
575 goto err_out;
576
a93192a5 577 p_port = prev->rswitch->route_table[rdev->destid];
6429cd49 578
af84ca38 579 if (p_port != RIO_INVALID_ROUTE) {
6429cd49
AB		 580 pr_debug("RIO: link failed on [%s]-P%d\n",
581 rio_name(prev), p_port);
582 *nrdev = prev;
583 *npnum = p_port;
584 rc = 0;
585 } else
af84ca38 586 pr_debug("RIO: failed to trace route to %s\n", rio_name(rdev));
6429cd49
AB		 587err_out:
588 return rc;
589}
590
591/**
592 * rio_mport_chk_dev_access - Validate access to the specified device.
593 * @mport: Master port to send transactions
594 * @destid: Device destination ID in network
595 * @hopcount: Number of hops into the network
596 */
e274e0ed 597int
6429cd49
AB		 598rio_mport_chk_dev_access(struct rio_mport *mport, u16 destid, u8 hopcount)
599{
600 int i = 0;
601 u32 tmp;
602
603 while (rio_mport_read_config_32(mport, destid, hopcount,
604 RIO_DEV_ID_CAR, &tmp)) {
605 i++;
606 if (i == RIO_MAX_CHK_RETRY)
607 return -EIO;
608 mdelay(1);
609 }
610
611 return 0;
612}
613
614/**
615 * rio_chk_dev_access - Validate access to the specified device.
616 * @rdev: Pointer to RIO device control structure
617 */
618static int rio_chk_dev_access(struct rio_dev *rdev)
619{
a93192a5
AB		 620 return rio_mport_chk_dev_access(rdev->net->hport,
621 rdev->destid, rdev->hopcount);
6429cd49
AB		 622}
623
dd5648c9
AB		 624/**
625 * rio_get_input_status - Sends a Link-Request/Input-Status control symbol and
626 * returns link-response (if requested).
627 * @rdev: RIO devive to issue Input-status command
628 * @pnum: Device port number to issue the command
629 * @lnkresp: Response from a link partner
630 */
631static int
632rio_get_input_status(struct rio_dev *rdev, int pnum, u32 *lnkresp)
633{
dd5648c9
AB		 634 u32 regval;
635 int checkcount;
636
637 if (lnkresp) {
638 /* Read from link maintenance response register
639 * to clear valid bit */
a93192a5 640 rio_read_config_32(rdev,
dd5648c9
AB		 641 rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum),
642 &regval);
643 udelay(50);
644 }
645
646 /* Issue Input-status command */
a93192a5 647 rio_write_config_32(rdev,
dd5648c9
AB		 648 rdev->phys_efptr + RIO_PORT_N_MNT_REQ_CSR(pnum),
649 RIO_MNT_REQ_CMD_IS);
650
651 /* Exit if the response is not expected */
652 if (lnkresp == NULL)
653 return 0;
654
655 checkcount = 3;
656 while (checkcount--) {
657 udelay(50);
a93192a5 658 rio_read_config_32(rdev,
dd5648c9
AB		 659 rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum),
660 &regval);
661 if (regval & RIO_PORT_N_MNT_RSP_RVAL) {
662 *lnkresp = regval;
663 return 0;
664 }
665 }
666
667 return -EIO;
668}
669
670/**
671 * rio_clr_err_stopped - Clears port Error-stopped states.
672 * @rdev: Pointer to RIO device control structure
673 * @pnum: Switch port number to clear errors
674 * @err_status: port error status (if 0 reads register from device)
675 */
676static int rio_clr_err_stopped(struct rio_dev *rdev, u32 pnum, u32 err_status)
677{
dd5648c9
AB		 678 struct rio_dev *nextdev = rdev->rswitch->nextdev[pnum];
679 u32 regval;
680 u32 far_ackid, far_linkstat, near_ackid;
681
682 if (err_status == 0)
a93192a5 683 rio_read_config_32(rdev,
dd5648c9
AB		 684 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum),
685 &err_status);
686
687 if (err_status & RIO_PORT_N_ERR_STS_PW_OUT_ES) {
688 pr_debug("RIO_EM: servicing Output Error-Stopped state\n");
689 /*
690 * Send a Link-Request/Input-Status control symbol
691 */
692 if (rio_get_input_status(rdev, pnum, &regval)) {
693 pr_debug("RIO_EM: Input-status response timeout\n");
694 goto rd_err;
695 }
696
697 pr_debug("RIO_EM: SP%d Input-status response=0x%08x\n",
698 pnum, regval);
699 far_ackid = (regval & RIO_PORT_N_MNT_RSP_ASTAT) >> 5;
700 far_linkstat = regval & RIO_PORT_N_MNT_RSP_LSTAT;
a93192a5 701 rio_read_config_32(rdev,
dd5648c9
AB		 702 rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum),
703 &regval);
704 pr_debug("RIO_EM: SP%d_ACK_STS_CSR=0x%08x\n", pnum, regval);
705 near_ackid = (regval & RIO_PORT_N_ACK_INBOUND) >> 24;
706 pr_debug("RIO_EM: SP%d far_ackID=0x%02x far_linkstat=0x%02x" \
707 " near_ackID=0x%02x\n",
708 pnum, far_ackid, far_linkstat, near_ackid);
709
710 /*
711 * If required, synchronize ackIDs of near and
712 * far sides.
713 */
714 if ((far_ackid != ((regval & RIO_PORT_N_ACK_OUTSTAND) >> 8)) ||
715 (far_ackid != (regval & RIO_PORT_N_ACK_OUTBOUND))) {
716 /* Align near outstanding/outbound ackIDs with
717 * far inbound.
718 */
a93192a5
AB		 719 rio_write_config_32(rdev,
720 rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum),
dd5648c9
AB		 721 (near_ackid << 24) |
722 (far_ackid << 8) | far_ackid);
723 /* Align far outstanding/outbound ackIDs with
724 * near inbound.
725 */
726 far_ackid++;
727 if (nextdev)
728 rio_write_config_32(nextdev,
729 nextdev->phys_efptr +
730 RIO_PORT_N_ACK_STS_CSR(RIO_GET_PORT_NUM(nextdev->swpinfo)),
731 (far_ackid << 24) |
732 (near_ackid << 8) | near_ackid);
733 else
734 pr_debug("RIO_EM: Invalid nextdev pointer (NULL)\n");
735 }
736rd_err:
a93192a5 737 rio_read_config_32(rdev,
dd5648c9
AB		 738 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum),
739 &err_status);
740 pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status);
741 }
742
743 if ((err_status & RIO_PORT_N_ERR_STS_PW_INP_ES) && nextdev) {
744 pr_debug("RIO_EM: servicing Input Error-Stopped state\n");
745 rio_get_input_status(nextdev,
746 RIO_GET_PORT_NUM(nextdev->swpinfo), NULL);
747 udelay(50);
748
a93192a5 749 rio_read_config_32(rdev,
dd5648c9
AB		 750 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum),
751 &err_status);
752 pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status);
753 }
754
755 return (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES |
756 RIO_PORT_N_ERR_STS_PW_INP_ES)) ? 1 : 0;
757}
758
e5cabeb3
AB		 759/**
760 * rio_inb_pwrite_handler - process inbound port-write message
761 * @pw_msg: pointer to inbound port-write message
762 *
763 * Processes an inbound port-write message. Returns 0 if the request
764 * has been satisfied.
765 */
766int rio_inb_pwrite_handler(union rio_pw_msg *pw_msg)
767{
768 struct rio_dev *rdev;
dd5648c9 769 u32 err_status, em_perrdet, em_ltlerrdet;
e5cabeb3
AB		 770 int rc, portnum;
771
e6536927 772 rdev = rio_get_comptag((pw_msg->em.comptag & RIO_CTAG_UDEVID), NULL);
e5cabeb3 773 if (rdev == NULL) {
6429cd49
AB		 774 /* Device removed or enumeration error */
775 pr_debug("RIO: %s No matching device for CTag 0x%08x\n",
e5cabeb3
AB		 776 __func__, pw_msg->em.comptag);
777 return -EIO;
778 }
779
780 pr_debug("RIO: Port-Write message from %s\n", rio_name(rdev));
781
782#ifdef DEBUG_PW
783 {
784 u32 i;
785 for (i = 0; i < RIO_PW_MSG_SIZE/sizeof(u32);) {
dd5648c9 786 pr_debug("0x%02x: %08x %08x %08x %08x\n",
e5cabeb3
AB		 787 i*4, pw_msg->raw[i], pw_msg->raw[i + 1],
788 pw_msg->raw[i + 2], pw_msg->raw[i + 3]);
789 i += 4;
790 }
e5cabeb3
AB		 791 }
792#endif
793
794 /* Call an external service function (if such is registered
795 * for this device). This may be the service for endpoints that send
796 * device-specific port-write messages. End-point messages expected
797 * to be handled completely by EP specific device driver.
798 * For switches rc==0 signals that no standard processing required.
799 */
800 if (rdev->pwcback != NULL) {
801 rc = rdev->pwcback(rdev, pw_msg, 0);
802 if (rc == 0)
803 return 0;
804 }
805
6429cd49
AB		 806 portnum = pw_msg->em.is_port & 0xFF;
807
808 /* Check if device and route to it are functional:
809 * Sometimes devices may send PW message(s) just before being
810 * powered down (or link being lost).
811 */
812 if (rio_chk_dev_access(rdev)) {
813 pr_debug("RIO: device access failed - get link partner\n");
814 /* Scan route to the device and identify failed link.
815 * This will replace device and port reported in PW message.
816 * PW message should not be used after this point.
817 */
818 if (rio_chk_dev_route(rdev, &rdev, &portnum)) {
819 pr_err("RIO: Route trace for %s failed\n",
820 rio_name(rdev));
821 return -EIO;
822 }
823 pw_msg = NULL;
824 }
825
e5cabeb3
AB		 826 /* For End-point devices processing stops here */
827 if (!(rdev->pef & RIO_PEF_SWITCH))
828 return 0;
829
830 if (rdev->phys_efptr == 0) {
831 pr_err("RIO_PW: Bad switch initialization for %s\n",
832 rio_name(rdev));
833 return 0;
834 }
835
e5cabeb3
AB		 836 /*
837 * Process the port-write notification from switch
838 */
e5cabeb3
AB		 839 if (rdev->rswitch->em_handle)
840 rdev->rswitch->em_handle(rdev, portnum);
841
a93192a5 842 rio_read_config_32(rdev,
e5cabeb3
AB		 843 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum),
844 &err_status);
845 pr_debug("RIO_PW: SP%d_ERR_STS_CSR=0x%08x\n", portnum, err_status);
846
dd5648c9 847 if (err_status & RIO_PORT_N_ERR_STS_PORT_OK) {
e5cabeb3 848
dd5648c9
AB		 849 if (!(rdev->rswitch->port_ok & (1 << portnum))) {
850 rdev->rswitch->port_ok |= (1 << portnum);
851 rio_set_port_lockout(rdev, portnum, 0);
852 /* Schedule Insertion Service */
853 pr_debug("RIO_PW: Device Insertion on [%s]-P%d\n",
854 rio_name(rdev), portnum);
855 }
e5cabeb3 856
dd5648c9
AB		 857 /* Clear error-stopped states (if reported).
858 * Depending on the link partner state, two attempts
859 * may be needed for successful recovery.
860 */
861 if (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES |
862 RIO_PORT_N_ERR_STS_PW_INP_ES)) {
863 if (rio_clr_err_stopped(rdev, portnum, err_status))
864 rio_clr_err_stopped(rdev, portnum, 0);
865 }
866 } else { /* if (err_status & RIO_PORT_N_ERR_STS_PORT_UNINIT) */
e5cabeb3 867
dd5648c9 868 if (rdev->rswitch->port_ok & (1 << portnum)) {
e5cabeb3
AB		 869 rdev->rswitch->port_ok &= ~(1 << portnum);
870 rio_set_port_lockout(rdev, portnum, 1);
871
a93192a5 872 rio_write_config_32(rdev,
e5cabeb3
AB		 873 rdev->phys_efptr +
874 RIO_PORT_N_ACK_STS_CSR(portnum),
875 RIO_PORT_N_ACK_CLEAR);
876
877 /* Schedule Extraction Service */
878 pr_debug("RIO_PW: Device Extraction on [%s]-P%d\n",
879 rio_name(rdev), portnum);
880 }
dd5648c9 881 }
e5cabeb3 882
a93192a5 883 rio_read_config_32(rdev,
dd5648c9
AB		 884 rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), &em_perrdet);
885 if (em_perrdet) {
886 pr_debug("RIO_PW: RIO_EM_P%d_ERR_DETECT=0x%08x\n",
887 portnum, em_perrdet);
888 /* Clear EM Port N Error Detect CSR */
a93192a5 889 rio_write_config_32(rdev,
dd5648c9
AB		 890 rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), 0);
891 }
892
a93192a5 893 rio_read_config_32(rdev,
dd5648c9
AB		 894 rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, &em_ltlerrdet);
895 if (em_ltlerrdet) {
896 pr_debug("RIO_PW: RIO_EM_LTL_ERR_DETECT=0x%08x\n",
897 em_ltlerrdet);
898 /* Clear EM L/T Layer Error Detect CSR */
a93192a5 899 rio_write_config_32(rdev,
dd5648c9 900 rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, 0);
e5cabeb3
AB		 901 }
902
388c45cc 903 /* Clear remaining error bits and Port-Write Pending bit */
a93192a5 904 rio_write_config_32(rdev,
dd5648c9 905 rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum),
388c45cc 906 err_status);
e5cabeb3
AB		 907
908 return 0;
909}
910EXPORT_SYMBOL_GPL(rio_inb_pwrite_handler);
911
912/**
913 * rio_mport_get_efb - get pointer to next extended features block
914 * @port: Master port to issue transaction
915 * @local: Indicate a local master port or remote device access
916 * @destid: Destination ID of the device
917 * @hopcount: Number of switch hops to the device
918 * @from: Offset of current Extended Feature block header (if 0 starts
919 * from ExtFeaturePtr)
920 */
921u32
922rio_mport_get_efb(struct rio_mport *port, int local, u16 destid,
923 u8 hopcount, u32 from)
924{
925 u32 reg_val;
926
927 if (from == 0) {
928 if (local)
929 rio_local_read_config_32(port, RIO_ASM_INFO_CAR,
930 &reg_val);
931 else
932 rio_mport_read_config_32(port, destid, hopcount,
933 RIO_ASM_INFO_CAR, &reg_val);
934 return reg_val & RIO_EXT_FTR_PTR_MASK;
935 } else {
936 if (local)
937 rio_local_read_config_32(port, from, &reg_val);
938 else
939 rio_mport_read_config_32(port, destid, hopcount,
940 from, &reg_val);
941 return RIO_GET_BLOCK_ID(reg_val);
942 }
943}
944
394b701c
MP		 945/**
946 * rio_mport_get_feature - query for devices' extended features
947 * @port: Master port to issue transaction
948 * @local: Indicate a local master port or remote device access
949 * @destid: Destination ID of the device
950 * @hopcount: Number of switch hops to the device
951 * @ftr: Extended feature code
952 *
953 * Tell if a device supports a given RapidIO capability.
954 * Returns the offset of the requested extended feature
955 * block within the device's RIO configuration space or
956 * 0 in case the device does not support it. Possible
957 * values for @ftr:
958 *
959 * %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices
960 *
961 * %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices
962 *
963 * %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices
964 *
965 * %RIO_EFB_SER_EP_ID LP/Serial EP Devices
966 *
967 * %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices
968 *
969 * %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices
970 */
971u32
972rio_mport_get_feature(struct rio_mport * port, int local, u16 destid,
973 u8 hopcount, int ftr)
974{
975 u32 asm_info, ext_ftr_ptr, ftr_header;
976
977 if (local)
978 rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info);
979 else
980 rio_mport_read_config_32(port, destid, hopcount,
981 RIO_ASM_INFO_CAR, &asm_info);
982
983 ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK;
984
985 while (ext_ftr_ptr) {
986 if (local)
987 rio_local_read_config_32(port, ext_ftr_ptr,
988 &ftr_header);
989 else
990 rio_mport_read_config_32(port, destid, hopcount,
991 ext_ftr_ptr, &ftr_header);
992 if (RIO_GET_BLOCK_ID(ftr_header) == ftr)
993 return ext_ftr_ptr;
994 if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header)))
995 break;
996 }
997
998 return 0;
999}
1000
1001/**
1002 * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did
1003 * @vid: RIO vid to match or %RIO_ANY_ID to match all vids
1004 * @did: RIO did to match or %RIO_ANY_ID to match all dids
1005 * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids
1006 * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids
1007 * @from: Previous RIO device found in search, or %NULL for new search
1008 *
1009 * Iterates through the list of known RIO devices. If a RIO device is
1010 * found with a matching @vid, @did, @asm_vid, @asm_did, the reference
1011 * count to the device is incrememted and a pointer to its device
1012 * structure is returned. Otherwise, %NULL is returned. A new search
1013 * is initiated by passing %NULL to the @from argument. Otherwise, if
1014 * @from is not %NULL, searches continue from next device on the global
1015 * list. The reference count for @from is always decremented if it is
1016 * not %NULL.
1017 */
1018struct rio_dev *rio_get_asm(u16 vid, u16 did,
1019 u16 asm_vid, u16 asm_did, struct rio_dev *from)
1020{
1021 struct list_head *n;
1022 struct rio_dev *rdev;
1023
1024 WARN_ON(in_interrupt());
1025 spin_lock(&rio_global_list_lock);
1026 n = from ? from->global_list.next : rio_devices.next;
1027
1028 while (n && (n != &rio_devices)) {
1029 rdev = rio_dev_g(n);
1030 if ((vid == RIO_ANY_ID || rdev->vid == vid) &&
1031 (did == RIO_ANY_ID || rdev->did == did) &&
1032 (asm_vid == RIO_ANY_ID || rdev->asm_vid == asm_vid) &&
1033 (asm_did == RIO_ANY_ID || rdev->asm_did == asm_did))
1034 goto exit;
1035 n = n->next;
1036 }
1037 rdev = NULL;
1038 exit:
1039 rio_dev_put(from);
1040 rdev = rio_dev_get(rdev);
1041 spin_unlock(&rio_global_list_lock);
1042 return rdev;
1043}
1044
1045/**
1046 * rio_get_device - Begin or continue searching for a RIO device by vid/did
1047 * @vid: RIO vid to match or %RIO_ANY_ID to match all vids
1048 * @did: RIO did to match or %RIO_ANY_ID to match all dids
1049 * @from: Previous RIO device found in search, or %NULL for new search
1050 *
1051 * Iterates through the list of known RIO devices. If a RIO device is
1052 * found with a matching @vid and @did, the reference count to the
1053 * device is incrememted and a pointer to its device structure is returned.
1054 * Otherwise, %NULL is returned. A new search is initiated by passing %NULL
1055 * to the @from argument. Otherwise, if @from is not %NULL, searches
1056 * continue from next device on the global list. The reference count for
1057 * @from is always decremented if it is not %NULL.
1058 */
1059struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from)
1060{
1061 return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from);
1062}
1063
07590ff0
AB		 1064/**
1065 * rio_std_route_add_entry - Add switch route table entry using standard
1066 * registers defined in RIO specification rev.1.3
1067 * @mport: Master port to issue transaction
1068 * @destid: Destination ID of the device
1069 * @hopcount: Number of switch hops to the device
1070 * @table: routing table ID (global or port-specific)
1071 * @route_destid: destID entry in the RT
1072 * @route_port: destination port for specified destID
1073 */
1074int rio_std_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
1075 u16 table, u16 route_destid, u8 route_port)
1076{
1077 if (table == RIO_GLOBAL_TABLE) {
1078 rio_mport_write_config_32(mport, destid, hopcount,
1079 RIO_STD_RTE_CONF_DESTID_SEL_CSR,
1080 (u32)route_destid);
1081 rio_mport_write_config_32(mport, destid, hopcount,
1082 RIO_STD_RTE_CONF_PORT_SEL_CSR,
1083 (u32)route_port);
1084 }
e5cabeb3 1085
07590ff0
AB		 1086 udelay(10);
1087 return 0;
1088}
1089
1090/**
1091 * rio_std_route_get_entry - Read switch route table entry (port number)
638c5945 1092 * associated with specified destID using standard registers defined in RIO
07590ff0
AB		 1093 * specification rev.1.3
1094 * @mport: Master port to issue transaction
1095 * @destid: Destination ID of the device
1096 * @hopcount: Number of switch hops to the device
1097 * @table: routing table ID (global or port-specific)
1098 * @route_destid: destID entry in the RT
1099 * @route_port: returned destination port for specified destID
1100 */
1101int rio_std_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
1102 u16 table, u16 route_destid, u8 *route_port)
1103{
1104 u32 result;
1105
1106 if (table == RIO_GLOBAL_TABLE) {
1107 rio_mport_write_config_32(mport, destid, hopcount,
1108 RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid);
1109 rio_mport_read_config_32(mport, destid, hopcount,
1110 RIO_STD_RTE_CONF_PORT_SEL_CSR, &result);
1111
1112 *route_port = (u8)result;
1113 }
1114
1115 return 0;
1116}
1117
1118/**
1119 * rio_std_route_clr_table - Clear swotch route table using standard registers
1120 * defined in RIO specification rev.1.3.
1121 * @mport: Master port to issue transaction
07590ff0
AB		 1122 * @destid: Destination ID of the device
1123 * @hopcount: Number of switch hops to the device
1124 * @table: routing table ID (global or port-specific)
1125 */
1126int rio_std_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount,
1127 u16 table)
1128{
1129 u32 max_destid = 0xff;
1130 u32 i, pef, id_inc = 1, ext_cfg = 0;
1131 u32 port_sel = RIO_INVALID_ROUTE;
1132
1133 if (table == RIO_GLOBAL_TABLE) {
1134 rio_mport_read_config_32(mport, destid, hopcount,
1135 RIO_PEF_CAR, &pef);
1136
1137 if (mport->sys_size) {
1138 rio_mport_read_config_32(mport, destid, hopcount,
1139 RIO_SWITCH_RT_LIMIT,
1140 &max_destid);
1141 max_destid &= RIO_RT_MAX_DESTID;
1142 }
1143
1144 if (pef & RIO_PEF_EXT_RT) {
1145 ext_cfg = 0x80000000;
1146 id_inc = 4;
1147 port_sel = (RIO_INVALID_ROUTE << 24) |
1148 (RIO_INVALID_ROUTE << 16) |
1149 (RIO_INVALID_ROUTE << 8) |
1150 RIO_INVALID_ROUTE;
1151 }
1152
1153 for (i = 0; i <= max_destid;) {
1154 rio_mport_write_config_32(mport, destid, hopcount,
1155 RIO_STD_RTE_CONF_DESTID_SEL_CSR,
1156 ext_cfg | i);
1157 rio_mport_write_config_32(mport, destid, hopcount,
1158 RIO_STD_RTE_CONF_PORT_SEL_CSR,
1159 port_sel);
1160 i += id_inc;
1161 }
1162 }
1163
1164 udelay(10);
1165 return 0;
1166}
1167
e42d98eb
AB		 1168#ifdef CONFIG_RAPIDIO_DMA_ENGINE
1169
1170static bool rio_chan_filter(struct dma_chan *chan, void *arg)
1171{
1172 struct rio_dev *rdev = arg;
1173
1174 /* Check that DMA device belongs to the right MPORT */
1175 return (rdev->net->hport ==
1176 container_of(chan->device, struct rio_mport, dma));
1177}
1178
1179/**
1180 * rio_request_dma - request RapidIO capable DMA channel that supports
1181 * specified target RapidIO device.
1182 * @rdev: RIO device control structure
1183 *
1184 * Returns pointer to allocated DMA channel or NULL if failed.
1185 */
1186struct dma_chan *rio_request_dma(struct rio_dev *rdev)
1187{
1188 dma_cap_mask_t mask;
1189 struct dma_chan *dchan;
1190
1191 dma_cap_zero(mask);
1192 dma_cap_set(DMA_SLAVE, mask);
1193 dchan = dma_request_channel(mask, rio_chan_filter, rdev);
1194
1195 return dchan;
1196}
1197EXPORT_SYMBOL_GPL(rio_request_dma);
1198
1199/**
1200 * rio_release_dma - release specified DMA channel
1201 * @dchan: DMA channel to release
1202 */
1203void rio_release_dma(struct dma_chan *dchan)
1204{
1205 dma_release_channel(dchan);
1206}
1207EXPORT_SYMBOL_GPL(rio_release_dma);
1208
1209/**
1210 * rio_dma_prep_slave_sg - RapidIO specific wrapper
1211 * for device_prep_slave_sg callback defined by DMAENGINE.
1212 * @rdev: RIO device control structure
1213 * @dchan: DMA channel to configure
1214 * @data: RIO specific data descriptor
1215 * @direction: DMA data transfer direction (TO or FROM the device)
1216 * @flags: dmaengine defined flags
1217 *
1218 * Initializes RapidIO capable DMA channel for the specified data transfer.
1219 * Uses DMA channel private extension to pass information related to remote
1220 * target RIO device.
1221 * Returns pointer to DMA transaction descriptor or NULL if failed.
1222 */
1223struct dma_async_tx_descriptor *rio_dma_prep_slave_sg(struct rio_dev *rdev,
1224 struct dma_chan *dchan, struct rio_dma_data *data,
1225 enum dma_transfer_direction direction, unsigned long flags)
1226{
1227 struct dma_async_tx_descriptor *txd = NULL;
1228 struct rio_dma_ext rio_ext;
1229
1230 if (dchan->device->device_prep_slave_sg == NULL) {
1231 pr_err("%s: prep_rio_sg == NULL\n", __func__);
1232 return NULL;
1233 }
1234
1235 rio_ext.destid = rdev->destid;
1236 rio_ext.rio_addr_u = data->rio_addr_u;
1237 rio_ext.rio_addr = data->rio_addr;
1238 rio_ext.wr_type = data->wr_type;
1239
1240 txd = dmaengine_prep_rio_sg(dchan, data->sg, data->sg_len,
1241 direction, flags, &rio_ext);
1242
1243 return txd;
1244}
1245EXPORT_SYMBOL_GPL(rio_dma_prep_slave_sg);
1246
1247#endif /* CONFIG_RAPIDIO_DMA_ENGINE */
1248
394b701c
MP		 1249static void rio_fixup_device(struct rio_dev *dev)
1250{
1251}
1252
1253static int __devinit rio_init(void)
1254{
1255 struct rio_dev *dev = NULL;
1256
1257 while ((dev = rio_get_device(RIO_ANY_ID, RIO_ANY_ID, dev)) != NULL) {
1258 rio_fixup_device(dev);
1259 }
1260 return 0;
1261}
1262
005842ef
AB		 1263static struct workqueue_struct *rio_wq;
1264
1265struct rio_disc_work {
1266 struct work_struct work;
1267 struct rio_mport *mport;
1268};
1269
1270static void __devinit disc_work_handler(struct work_struct *_work)
1271{
1272 struct rio_disc_work *work;
1273
1274 work = container_of(_work, struct rio_disc_work, work);
1275 pr_debug("RIO: discovery work for mport %d %s\n",
1276 work->mport->id, work->mport->name);
1277 rio_disc_mport(work->mport);
1278
1279 kfree(work);
1280}
1281
37d33d15 1282int __devinit rio_init_mports(void)
394b701c 1283{
394b701c 1284 struct rio_mport *port;
005842ef
AB		 1285 struct rio_disc_work *work;
1286 int no_disc = 0;
394b701c
MP		 1287
1288 list_for_each_entry(port, &rio_mports, node) {
394b701c
MP		 1289 if (port->host_deviceid >= 0)
1290 rio_enum_mport(port);
005842ef
AB		 1291 else if (!no_disc) {
1292 if (!rio_wq) {
1293 rio_wq = alloc_workqueue("riodisc", 0, 0);
1294 if (!rio_wq) {
1295 pr_err("RIO: unable allocate rio_wq\n");
1296 no_disc = 1;
1297 continue;
1298 }
1299 }
1300
1301 work = kzalloc(sizeof *work, GFP_KERNEL);
1302 if (!work) {
1303 pr_err("RIO: no memory for work struct\n");
1304 no_disc = 1;
1305 continue;
1306 }
1307
1308 work->mport = port;
1309 INIT_WORK(&work->work, disc_work_handler);
1310 queue_work(rio_wq, &work->work);
1311 }
1312 }
1313
1314 if (rio_wq) {
1315 pr_debug("RIO: flush discovery workqueue\n");
1316 flush_workqueue(rio_wq);
1317 pr_debug("RIO: flush discovery workqueue finished\n");
1318 destroy_workqueue(rio_wq);
394b701c
MP		 1319 }
1320
2f809985
AB		 1321 rio_init();
1322
c1256ebe 1323 return 0;
394b701c
MP		 1324}
1325
2f809985
AB		 1326device_initcall_sync(rio_init_mports);
1327
569fccb6
AB		 1328static int hdids[RIO_MAX_MPORTS + 1];
1329
1330static int rio_get_hdid(int index)
1331{
1332 if (!hdids[0] || hdids[0] <= index || index >= RIO_MAX_MPORTS)
1333 return -1;
1334
1335 return hdids[index + 1];
1336}
1337
1338static int rio_hdid_setup(char *str)
1339{
1340 (void)get_options(str, ARRAY_SIZE(hdids), hdids);
1341 return 1;
1342}
1343
1344__setup("riohdid=", rio_hdid_setup);
1345
59f99965 1346int rio_register_mport(struct rio_mport *port)
394b701c 1347{
569fccb6
AB		 1348 if (next_portid >= RIO_MAX_MPORTS) {
1349 pr_err("RIO: reached specified max number of mports\n");
59f99965 1350 return 1;
569fccb6
AB		 1351 }
1352
1353 port->id = next_portid++;
1354 port->host_deviceid = rio_get_hdid(port->id);
394b701c 1355 list_add_tail(&port->node, &rio_mports);
59f99965 1356 return 0;
394b701c
MP		 1357}
1358
1359EXPORT_SYMBOL_GPL(rio_local_get_device_id);
1360EXPORT_SYMBOL_GPL(rio_get_device);
1361EXPORT_SYMBOL_GPL(rio_get_asm);
1362EXPORT_SYMBOL_GPL(rio_request_inb_dbell);
1363EXPORT_SYMBOL_GPL(rio_release_inb_dbell);
1364EXPORT_SYMBOL_GPL(rio_request_outb_dbell);
1365EXPORT_SYMBOL_GPL(rio_release_outb_dbell);
1366EXPORT_SYMBOL_GPL(rio_request_inb_mbox);
1367EXPORT_SYMBOL_GPL(rio_release_inb_mbox);
1368EXPORT_SYMBOL_GPL(rio_request_outb_mbox);
1369EXPORT_SYMBOL_GPL(rio_release_outb_mbox);
kernel source for telekom puls (alcatel/mediatek)