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17#include <linux/types.h>
18#include <linux/kernel.h>
19
20#include <linux/delay.h>
21#include <linux/dma-mapping.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>
29#include <linux/timer.h>
30#include <linux/sched.h>
31#include <linux/jiffies.h>
32#include <linux/slab.h>
33
34#include "rio.h"
35
36static void rio_init_em(struct rio_dev *rdev);
37
38struct rio_id_table {
39 u16 start;
40 u32 max;
41 spinlock_t lock;
42 unsigned long table[];
43};
44
45static int next_destid = 0;
46static int next_comptag = 1;
47
48
49
50
51
52
53
54
55
56static u16 rio_destid_alloc(struct rio_net *net)
57{
58 int destid;
59 struct rio_id_table *idtab = (struct rio_id_table *)net->enum_data;
60
61 spin_lock(&idtab->lock);
62 destid = find_first_zero_bit(idtab->table, idtab->max);
63
64 if (destid < idtab->max) {
65 set_bit(destid, idtab->table);
66 destid += idtab->start;
67 } else
68 destid = RIO_INVALID_DESTID;
69
70 spin_unlock(&idtab->lock);
71 return (u16)destid;
72}
73
74
75
76
77
78
79
80
81
82static int rio_destid_reserve(struct rio_net *net, u16 destid)
83{
84 int oldbit;
85 struct rio_id_table *idtab = (struct rio_id_table *)net->enum_data;
86
87 destid -= idtab->start;
88 spin_lock(&idtab->lock);
89 oldbit = test_and_set_bit(destid, idtab->table);
90 spin_unlock(&idtab->lock);
91 return oldbit;
92}
93
94
95
96
97
98
99
100
101static void rio_destid_free(struct rio_net *net, u16 destid)
102{
103 struct rio_id_table *idtab = (struct rio_id_table *)net->enum_data;
104
105 destid -= idtab->start;
106 spin_lock(&idtab->lock);
107 clear_bit(destid, idtab->table);
108 spin_unlock(&idtab->lock);
109}
110
111
112
113
114
115static u16 rio_destid_first(struct rio_net *net)
116{
117 int destid;
118 struct rio_id_table *idtab = (struct rio_id_table *)net->enum_data;
119
120 spin_lock(&idtab->lock);
121 destid = find_first_bit(idtab->table, idtab->max);
122 if (destid >= idtab->max)
123 destid = RIO_INVALID_DESTID;
124 else
125 destid += idtab->start;
126 spin_unlock(&idtab->lock);
127 return (u16)destid;
128}
129
130
131
132
133
134
135static u16 rio_destid_next(struct rio_net *net, u16 from)
136{
137 int destid;
138 struct rio_id_table *idtab = (struct rio_id_table *)net->enum_data;
139
140 spin_lock(&idtab->lock);
141 destid = find_next_bit(idtab->table, idtab->max, from);
142 if (destid >= idtab->max)
143 destid = RIO_INVALID_DESTID;
144 else
145 destid += idtab->start;
146 spin_unlock(&idtab->lock);
147 return (u16)destid;
148}
149
150
151
152
153
154
155
156
157
158
159static u16 rio_get_device_id(struct rio_mport *port, u16 destid, u8 hopcount)
160{
161 u32 result;
162
163 rio_mport_read_config_32(port, destid, hopcount, RIO_DID_CSR, &result);
164
165 return RIO_GET_DID(port->sys_size, result);
166}
167
168
169
170
171
172
173
174
175
176
177static void rio_set_device_id(struct rio_mport *port, u16 destid, u8 hopcount, u16 did)
178{
179 rio_mport_write_config_32(port, destid, hopcount, RIO_DID_CSR,
180 RIO_SET_DID(port->sys_size, did));
181}
182
183
184
185
186
187
188
189
190
191static int rio_clear_locks(struct rio_net *net)
192{
193 struct rio_mport *port = net->hport;
194 struct rio_dev *rdev;
195 u32 result;
196 int ret = 0;
197
198
199 rio_local_write_config_32(port, RIO_HOST_DID_LOCK_CSR,
200 port->host_deviceid);
201 rio_local_read_config_32(port, RIO_HOST_DID_LOCK_CSR, &result);
202 if ((result & 0xffff) != 0xffff) {
203 printk(KERN_INFO
204 "RIO: badness when releasing host lock on master port, result %8.8x\n",
205 result);
206 ret = -EINVAL;
207 }
208 list_for_each_entry(rdev, &net->devices, net_list) {
209 rio_write_config_32(rdev, RIO_HOST_DID_LOCK_CSR,
210 port->host_deviceid);
211 rio_read_config_32(rdev, RIO_HOST_DID_LOCK_CSR, &result);
212 if ((result & 0xffff) != 0xffff) {
213 printk(KERN_INFO
214 "RIO: badness when releasing host lock on vid %4.4x did %4.4x\n",
215 rdev->vid, rdev->did);
216 ret = -EINVAL;
217 }
218
219
220 rio_read_config_32(rdev,
221 rdev->phys_efptr + RIO_PORT_GEN_CTL_CSR,
222 &result);
223 result |= RIO_PORT_GEN_DISCOVERED | RIO_PORT_GEN_MASTER;
224 rio_write_config_32(rdev,
225 rdev->phys_efptr + RIO_PORT_GEN_CTL_CSR,
226 result);
227 }
228
229 return ret;
230}
231
232
233
234
235
236
237
238
239
240static int rio_enum_host(struct rio_mport *port)
241{
242 u32 result;
243
244
245 rio_local_write_config_32(port, RIO_HOST_DID_LOCK_CSR,
246 port->host_deviceid);
247
248 rio_local_read_config_32(port, RIO_HOST_DID_LOCK_CSR, &result);
249 if ((result & 0xffff) != port->host_deviceid)
250 return -1;
251
252
253 rio_local_set_device_id(port, port->host_deviceid);
254 return 0;
255}
256
257
258
259
260
261
262
263
264
265
266
267static int rio_device_has_destid(struct rio_mport *port, int src_ops,
268 int dst_ops)
269{
270 u32 mask = RIO_OPS_READ | RIO_OPS_WRITE | RIO_OPS_ATOMIC_TST_SWP | RIO_OPS_ATOMIC_INC | RIO_OPS_ATOMIC_DEC | RIO_OPS_ATOMIC_SET | RIO_OPS_ATOMIC_CLR;
271
272 return !!((src_ops | dst_ops) & mask);
273}
274
275
276
277
278
279
280
281
282static void rio_release_dev(struct device *dev)
283{
284 struct rio_dev *rdev;
285
286 rdev = to_rio_dev(dev);
287 kfree(rdev);
288}
289
290
291
292
293
294
295
296
297
298
299static int rio_is_switch(struct rio_dev *rdev)
300{
301 if (rdev->pef & RIO_PEF_SWITCH)
302 return 1;
303 return 0;
304}
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322static struct rio_dev *rio_setup_device(struct rio_net *net,
323 struct rio_mport *port, u16 destid,
324 u8 hopcount, int do_enum)
325{
326 int ret = 0;
327 struct rio_dev *rdev;
328 struct rio_switch *rswitch = NULL;
329 int result, rdid;
330 size_t size;
331 u32 swpinfo = 0;
332
333 size = sizeof(*rdev);
334 if (rio_mport_read_config_32(port, destid, hopcount,
335 RIO_PEF_CAR, &result))
336 return NULL;
337
338 if (result & (RIO_PEF_SWITCH | RIO_PEF_MULTIPORT)) {
339 rio_mport_read_config_32(port, destid, hopcount,
340 RIO_SWP_INFO_CAR, &swpinfo);
341 if (result & RIO_PEF_SWITCH)
342 size += struct_size(rswitch, nextdev, RIO_GET_TOTAL_PORTS(swpinfo));
343 }
344
345 rdev = kzalloc(size, GFP_KERNEL);
346 if (!rdev)
347 return NULL;
348
349 rdev->net = net;
350 rdev->pef = result;
351 rdev->swpinfo = swpinfo;
352 rio_mport_read_config_32(port, destid, hopcount, RIO_DEV_ID_CAR,
353 &result);
354 rdev->did = result >> 16;
355 rdev->vid = result & 0xffff;
356 rio_mport_read_config_32(port, destid, hopcount, RIO_DEV_INFO_CAR,
357 &rdev->device_rev);
358 rio_mport_read_config_32(port, destid, hopcount, RIO_ASM_ID_CAR,
359 &result);
360 rdev->asm_did = result >> 16;
361 rdev->asm_vid = result & 0xffff;
362 rio_mport_read_config_32(port, destid, hopcount, RIO_ASM_INFO_CAR,
363 &result);
364 rdev->asm_rev = result >> 16;
365 if (rdev->pef & RIO_PEF_EXT_FEATURES) {
366 rdev->efptr = result & 0xffff;
367 rdev->phys_efptr = rio_mport_get_physefb(port, 0, destid,
368 hopcount, &rdev->phys_rmap);
369 pr_debug("RIO: %s Register Map %d device\n",
370 __func__, rdev->phys_rmap);
371
372 rdev->em_efptr = rio_mport_get_feature(port, 0, destid,
373 hopcount, RIO_EFB_ERR_MGMNT);
374 if (!rdev->em_efptr)
375 rdev->em_efptr = rio_mport_get_feature(port, 0, destid,
376 hopcount, RIO_EFB_ERR_MGMNT_HS);
377 }
378
379 rio_mport_read_config_32(port, destid, hopcount, RIO_SRC_OPS_CAR,
380 &rdev->src_ops);
381 rio_mport_read_config_32(port, destid, hopcount, RIO_DST_OPS_CAR,
382 &rdev->dst_ops);
383
384 if (do_enum) {
385
386 if (next_comptag >= 0x10000) {
387 pr_err("RIO: Component Tag Counter Overflow\n");
388 goto cleanup;
389 }
390 rio_mport_write_config_32(port, destid, hopcount,
391 RIO_COMPONENT_TAG_CSR, next_comptag);
392 rdev->comp_tag = next_comptag++;
393 rdev->do_enum = true;
394 } else {
395 rio_mport_read_config_32(port, destid, hopcount,
396 RIO_COMPONENT_TAG_CSR,
397 &rdev->comp_tag);
398 }
399
400 if (rio_device_has_destid(port, rdev->src_ops, rdev->dst_ops)) {
401 if (do_enum) {
402 rio_set_device_id(port, destid, hopcount, next_destid);
403 rdev->destid = next_destid;
404 next_destid = rio_destid_alloc(net);
405 } else
406 rdev->destid = rio_get_device_id(port, destid, hopcount);
407
408 rdev->hopcount = 0xff;
409 } else {
410
411
412
413 rdev->destid = destid;
414 rdev->hopcount = hopcount;
415 }
416
417
418 if (rio_is_switch(rdev)) {
419 rswitch = rdev->rswitch;
420 rswitch->port_ok = 0;
421 spin_lock_init(&rswitch->lock);
422 rswitch->route_table =
423 kzalloc(RIO_MAX_ROUTE_ENTRIES(port->sys_size),
424 GFP_KERNEL);
425 if (!rswitch->route_table)
426 goto cleanup;
427
428 for (rdid = 0; rdid < RIO_MAX_ROUTE_ENTRIES(port->sys_size);
429 rdid++)
430 rswitch->route_table[rdid] = RIO_INVALID_ROUTE;
431 dev_set_name(&rdev->dev, "%02x:s:%04x", rdev->net->id,
432 rdev->comp_tag & RIO_CTAG_UDEVID);
433
434 if (do_enum)
435 rio_route_clr_table(rdev, RIO_GLOBAL_TABLE, 0);
436 } else {
437 if (do_enum)
438
439 rio_enable_rx_tx_port(port, 0, destid, hopcount, 0);
440
441 dev_set_name(&rdev->dev, "%02x:e:%04x", rdev->net->id,
442 rdev->comp_tag & RIO_CTAG_UDEVID);
443 }
444
445 rdev->dev.parent = &net->dev;
446 rio_attach_device(rdev);
447 rdev->dev.release = rio_release_dev;
448 rdev->dma_mask = DMA_BIT_MASK(32);
449 rdev->dev.dma_mask = &rdev->dma_mask;
450 rdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
451
452 if (rdev->dst_ops & RIO_DST_OPS_DOORBELL)
453 rio_init_dbell_res(&rdev->riores[RIO_DOORBELL_RESOURCE],
454 0, 0xffff);
455
456 ret = rio_add_device(rdev);
457 if (ret)
458 goto cleanup;
459
460 rio_dev_get(rdev);
461
462 return rdev;
463
464cleanup:
465 if (rswitch)
466 kfree(rswitch->route_table);
467
468 kfree(rdev);
469 return NULL;
470}
471
472
473
474
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476
477
478
479
480
481
482static int
483rio_sport_is_active(struct rio_dev *rdev, int sp)
484{
485 u32 result = 0;
486
487 rio_read_config_32(rdev, RIO_DEV_PORT_N_ERR_STS_CSR(rdev, sp),
488 &result);
489
490 return result & RIO_PORT_N_ERR_STS_PORT_OK;
491}
492
493
494
495
496
497
498
499
500
501static u16 rio_get_host_deviceid_lock(struct rio_mport *port, u8 hopcount)
502{
503 u32 result;
504
505 rio_mport_read_config_32(port, RIO_ANY_DESTID(port->sys_size), hopcount,
506 RIO_HOST_DID_LOCK_CSR, &result);
507
508 return (u16) (result & 0xffff);
509}
510
511
512
513
514
515
516
517
518
519
520
521
522static int rio_enum_peer(struct rio_net *net, struct rio_mport *port,
523 u8 hopcount, struct rio_dev *prev, int prev_port)
524{
525 struct rio_dev *rdev;
526 u32 regval;
527 int tmp;
528
529 if (rio_mport_chk_dev_access(port,
530 RIO_ANY_DESTID(port->sys_size), hopcount)) {
531 pr_debug("RIO: device access check failed\n");
532 return -1;
533 }
534
535 if (rio_get_host_deviceid_lock(port, hopcount) == port->host_deviceid) {
536 pr_debug("RIO: PE already discovered by this host\n");
537
538
539
540
541 rio_mport_read_config_32(port, RIO_ANY_DESTID(port->sys_size),
542 hopcount, RIO_COMPONENT_TAG_CSR, ®val);
543
544 if (regval) {
545 rdev = rio_get_comptag((regval & 0xffff), NULL);
546
547 if (rdev && prev && rio_is_switch(prev)) {
548 pr_debug("RIO: redundant path to %s\n",
549 rio_name(rdev));
550 prev->rswitch->nextdev[prev_port] = rdev;
551 }
552 }
553
554 return 0;
555 }
556
557
558 rio_mport_write_config_32(port, RIO_ANY_DESTID(port->sys_size),
559 hopcount,
560 RIO_HOST_DID_LOCK_CSR, port->host_deviceid);
561 while ((tmp = rio_get_host_deviceid_lock(port, hopcount))
562 < port->host_deviceid) {
563
564 mdelay(1);
565
566 rio_mport_write_config_32(port, RIO_ANY_DESTID(port->sys_size),
567 hopcount,
568 RIO_HOST_DID_LOCK_CSR,
569 port->host_deviceid);
570 }
571
572 if (rio_get_host_deviceid_lock(port, hopcount) > port->host_deviceid) {
573 pr_debug(
574 "RIO: PE locked by a higher priority host...retreating\n");
575 return -1;
576 }
577
578
579 rdev = rio_setup_device(net, port, RIO_ANY_DESTID(port->sys_size),
580 hopcount, 1);
581 if (rdev) {
582 rdev->prev = prev;
583 if (prev && rio_is_switch(prev))
584 prev->rswitch->nextdev[prev_port] = rdev;
585 } else
586 return -1;
587
588 if (rio_is_switch(rdev)) {
589 int sw_destid;
590 int cur_destid;
591 int sw_inport;
592 u16 destid;
593 int port_num;
594
595 sw_inport = RIO_GET_PORT_NUM(rdev->swpinfo);
596 rio_route_add_entry(rdev, RIO_GLOBAL_TABLE,
597 port->host_deviceid, sw_inport, 0);
598 rdev->rswitch->route_table[port->host_deviceid] = sw_inport;
599
600 destid = rio_destid_first(net);
601 while (destid != RIO_INVALID_DESTID && destid < next_destid) {
602 if (destid != port->host_deviceid) {
603 rio_route_add_entry(rdev, RIO_GLOBAL_TABLE,
604 destid, sw_inport, 0);
605 rdev->rswitch->route_table[destid] = sw_inport;
606 }
607 destid = rio_destid_next(net, destid + 1);
608 }
609 pr_debug(
610 "RIO: found %s (vid %4.4x did %4.4x) with %d ports\n",
611 rio_name(rdev), rdev->vid, rdev->did,
612 RIO_GET_TOTAL_PORTS(rdev->swpinfo));
613 sw_destid = next_destid;
614 for (port_num = 0;
615 port_num < RIO_GET_TOTAL_PORTS(rdev->swpinfo);
616 port_num++) {
617 if (sw_inport == port_num) {
618 rio_enable_rx_tx_port(port, 0,
619 RIO_ANY_DESTID(port->sys_size),
620 hopcount, port_num);
621 rdev->rswitch->port_ok |= (1 << port_num);
622 continue;
623 }
624
625 cur_destid = next_destid;
626
627 if (rio_sport_is_active(rdev, port_num)) {
628 pr_debug(
629 "RIO: scanning device on port %d\n",
630 port_num);
631 rio_enable_rx_tx_port(port, 0,
632 RIO_ANY_DESTID(port->sys_size),
633 hopcount, port_num);
634 rdev->rswitch->port_ok |= (1 << port_num);
635 rio_route_add_entry(rdev, RIO_GLOBAL_TABLE,
636 RIO_ANY_DESTID(port->sys_size),
637 port_num, 0);
638
639 if (rio_enum_peer(net, port, hopcount + 1,
640 rdev, port_num) < 0)
641 return -1;
642
643
644 destid = rio_destid_next(net, cur_destid + 1);
645 if (destid != RIO_INVALID_DESTID) {
646 for (destid = cur_destid;
647 destid < next_destid;) {
648 if (destid != port->host_deviceid) {
649 rio_route_add_entry(rdev,
650 RIO_GLOBAL_TABLE,
651 destid,
652 port_num,
653 0);
654 rdev->rswitch->
655 route_table[destid] =
656 port_num;
657 }
658 destid = rio_destid_next(net,
659 destid + 1);
660 }
661 }
662 } else {
663
664
665
666 if (rdev->em_efptr)
667 rio_set_port_lockout(rdev, port_num, 1);
668
669 rdev->rswitch->port_ok &= ~(1 << port_num);
670 }
671 }
672
673
674 if ((rdev->src_ops & RIO_SRC_OPS_PORT_WRITE) &&
675 (rdev->em_efptr)) {
676 rio_write_config_32(rdev,
677 rdev->em_efptr + RIO_EM_PW_TGT_DEVID,
678 (port->host_deviceid << 16) |
679 (port->sys_size << 15));
680 }
681
682 rio_init_em(rdev);
683
684
685 if (next_destid == sw_destid)
686 next_destid = rio_destid_alloc(net);
687
688 rdev->destid = sw_destid;
689 } else
690 pr_debug("RIO: found %s (vid %4.4x did %4.4x)\n",
691 rio_name(rdev), rdev->vid, rdev->did);
692
693 return 0;
694}
695
696
697
698
699
700
701
702
703
704static int rio_enum_complete(struct rio_mport *port)
705{
706 u32 regval;
707
708 rio_local_read_config_32(port, port->phys_efptr + RIO_PORT_GEN_CTL_CSR,
709 ®val);
710 return (regval & RIO_PORT_GEN_DISCOVERED) ? 1 : 0;
711}
712
713
714
715
716
717
718
719
720
721
722
723
724
725static int
726rio_disc_peer(struct rio_net *net, struct rio_mport *port, u16 destid,
727 u8 hopcount, struct rio_dev *prev, int prev_port)
728{
729 u8 port_num, route_port;
730 struct rio_dev *rdev;
731 u16 ndestid;
732
733
734 if ((rdev = rio_setup_device(net, port, destid, hopcount, 0))) {
735 rdev->prev = prev;
736 if (prev && rio_is_switch(prev))
737 prev->rswitch->nextdev[prev_port] = rdev;
738 } else
739 return -1;
740
741 if (rio_is_switch(rdev)) {
742
743 rdev->destid = destid;
744
745 pr_debug(
746 "RIO: found %s (vid %4.4x did %4.4x) with %d ports\n",
747 rio_name(rdev), rdev->vid, rdev->did,
748 RIO_GET_TOTAL_PORTS(rdev->swpinfo));
749 for (port_num = 0;
750 port_num < RIO_GET_TOTAL_PORTS(rdev->swpinfo);
751 port_num++) {
752 if (RIO_GET_PORT_NUM(rdev->swpinfo) == port_num)
753 continue;
754
755 if (rio_sport_is_active(rdev, port_num)) {
756 pr_debug(
757 "RIO: scanning device on port %d\n",
758 port_num);
759
760 rio_lock_device(port, destid, hopcount, 1000);
761
762 for (ndestid = 0;
763 ndestid < RIO_ANY_DESTID(port->sys_size);
764 ndestid++) {
765 rio_route_get_entry(rdev,
766 RIO_GLOBAL_TABLE,
767 ndestid,
768 &route_port, 0);
769 if (route_port == port_num)
770 break;
771 }
772
773 if (ndestid == RIO_ANY_DESTID(port->sys_size))
774 continue;
775 rio_unlock_device(port, destid, hopcount);
776 if (rio_disc_peer(net, port, ndestid,
777 hopcount + 1, rdev, port_num) < 0)
778 return -1;
779 }
780 }
781 } else
782 pr_debug("RIO: found %s (vid %4.4x did %4.4x)\n",
783 rio_name(rdev), rdev->vid, rdev->did);
784
785 return 0;
786}
787
788
789
790
791
792
793
794
795
796
797static int rio_mport_is_active(struct rio_mport *port)
798{
799 u32 result = 0;
800
801 rio_local_read_config_32(port,
802 port->phys_efptr +
803 RIO_PORT_N_ERR_STS_CSR(port->index, port->phys_rmap),
804 &result);
805 return result & RIO_PORT_N_ERR_STS_PORT_OK;
806}
807
808static void rio_scan_release_net(struct rio_net *net)
809{
810 pr_debug("RIO-SCAN: %s: net_%d\n", __func__, net->id);
811 kfree(net->enum_data);
812}
813
814static void rio_scan_release_dev(struct device *dev)
815{
816 struct rio_net *net;
817
818 net = to_rio_net(dev);
819 pr_debug("RIO-SCAN: %s: net_%d\n", __func__, net->id);
820 kfree(net);
821}
822
823
824
825
826
827
828
829
830
831
832
833static struct rio_net *rio_scan_alloc_net(struct rio_mport *mport,
834 int do_enum, u16 start)
835{
836 struct rio_net *net;
837
838 net = rio_alloc_net(mport);
839
840 if (net && do_enum) {
841 struct rio_id_table *idtab;
842 size_t size;
843
844 size = sizeof(struct rio_id_table) +
845 BITS_TO_LONGS(
846 RIO_MAX_ROUTE_ENTRIES(mport->sys_size)
847 ) * sizeof(long);
848
849 idtab = kzalloc(size, GFP_KERNEL);
850
851 if (idtab == NULL) {
852 pr_err("RIO: failed to allocate destID table\n");
853 rio_free_net(net);
854 net = NULL;
855 } else {
856 net->enum_data = idtab;
857 net->release = rio_scan_release_net;
858 idtab->start = start;
859 idtab->max = RIO_MAX_ROUTE_ENTRIES(mport->sys_size);
860 spin_lock_init(&idtab->lock);
861 }
862 }
863
864 if (net) {
865 net->id = mport->id;
866 net->hport = mport;
867 dev_set_name(&net->dev, "rnet_%d", net->id);
868 net->dev.parent = &mport->dev;
869 net->dev.release = rio_scan_release_dev;
870 rio_add_net(net);
871 }
872
873 return net;
874}
875
876
877
878
879
880
881
882
883
884static void rio_update_route_tables(struct rio_net *net)
885{
886 struct rio_dev *rdev, *swrdev;
887 struct rio_switch *rswitch;
888 u8 sport;
889 u16 destid;
890
891 list_for_each_entry(rdev, &net->devices, net_list) {
892
893 destid = rdev->destid;
894
895 list_for_each_entry(rswitch, &net->switches, node) {
896
897 if (rio_is_switch(rdev) && (rdev->rswitch == rswitch))
898 continue;
899
900 if (RIO_INVALID_ROUTE == rswitch->route_table[destid]) {
901 swrdev = sw_to_rio_dev(rswitch);
902
903
904 if (swrdev->destid == destid)
905 continue;
906
907 sport = RIO_GET_PORT_NUM(swrdev->swpinfo);
908
909 rio_route_add_entry(swrdev, RIO_GLOBAL_TABLE,
910 destid, sport, 0);
911 rswitch->route_table[destid] = sport;
912 }
913 }
914 }
915}
916
917
918
919
920
921
922
923
924static void rio_init_em(struct rio_dev *rdev)
925{
926 if (rio_is_switch(rdev) && (rdev->em_efptr) &&
927 rdev->rswitch->ops && rdev->rswitch->ops->em_init) {
928 rdev->rswitch->ops->em_init(rdev);
929 }
930}
931
932
933
934
935
936
937
938
939
940
941
942static int rio_enum_mport(struct rio_mport *mport, u32 flags)
943{
944 struct rio_net *net = NULL;
945 int rc = 0;
946
947 printk(KERN_INFO "RIO: enumerate master port %d, %s\n", mport->id,
948 mport->name);
949
950
951
952
953
954
955
956 if (mport->nnode.next || mport->nnode.prev)
957 return -EBUSY;
958
959
960 if (rio_enum_host(mport) < 0) {
961 printk(KERN_INFO
962 "RIO: master port %d device has been enumerated by a remote host\n",
963 mport->id);
964 rc = -EBUSY;
965 goto out;
966 }
967
968
969 if (rio_mport_is_active(mport)) {
970 net = rio_scan_alloc_net(mport, 1, 0);
971 if (!net) {
972 printk(KERN_ERR "RIO: failed to allocate new net\n");
973 rc = -ENOMEM;
974 goto out;
975 }
976
977
978 rio_destid_reserve(net, mport->host_deviceid);
979
980
981 rio_enable_rx_tx_port(mport, 1, 0, 0, 0);
982
983
984 rio_local_write_config_32(mport, RIO_COMPONENT_TAG_CSR,
985 next_comptag++);
986
987 next_destid = rio_destid_alloc(net);
988
989 if (rio_enum_peer(net, mport, 0, NULL, 0) < 0) {
990
991 printk(KERN_INFO
992 "RIO: master port %d device has lost enumeration to a remote host\n",
993 mport->id);
994 rio_clear_locks(net);
995 rc = -EBUSY;
996 goto out;
997 }
998
999 rio_destid_free(net, next_destid);
1000 rio_update_route_tables(net);
1001 rio_clear_locks(net);
1002 rio_pw_enable(mport, 1);
1003 } else {
1004 printk(KERN_INFO "RIO: master port %d link inactive\n",
1005 mport->id);
1006 rc = -EINVAL;
1007 }
1008
1009 out:
1010 return rc;
1011}
1012
1013
1014
1015
1016
1017
1018
1019
1020static void rio_build_route_tables(struct rio_net *net)
1021{
1022 struct rio_switch *rswitch;
1023 struct rio_dev *rdev;
1024 int i;
1025 u8 sport;
1026
1027 list_for_each_entry(rswitch, &net->switches, node) {
1028 rdev = sw_to_rio_dev(rswitch);
1029
1030 rio_lock_device(net->hport, rdev->destid,
1031 rdev->hopcount, 1000);
1032 for (i = 0;
1033 i < RIO_MAX_ROUTE_ENTRIES(net->hport->sys_size);
1034 i++) {
1035 if (rio_route_get_entry(rdev, RIO_GLOBAL_TABLE,
1036 i, &sport, 0) < 0)
1037 continue;
1038 rswitch->route_table[i] = sport;
1039 }
1040
1041 rio_unlock_device(net->hport, rdev->destid, rdev->hopcount);
1042 }
1043}
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057static int rio_disc_mport(struct rio_mport *mport, u32 flags)
1058{
1059 struct rio_net *net = NULL;
1060 unsigned long to_end;
1061
1062 printk(KERN_INFO "RIO: discover master port %d, %s\n", mport->id,
1063 mport->name);
1064
1065
1066 if (rio_mport_is_active(mport)) {
1067 if (rio_enum_complete(mport))
1068 goto enum_done;
1069 else if (flags & RIO_SCAN_ENUM_NO_WAIT)
1070 return -EAGAIN;
1071
1072 pr_debug("RIO: wait for enumeration to complete...\n");
1073
1074 to_end = jiffies + CONFIG_RAPIDIO_DISC_TIMEOUT * HZ;
1075 while (time_before(jiffies, to_end)) {
1076 if (rio_enum_complete(mport))
1077 goto enum_done;
1078 msleep(10);
1079 }
1080
1081 pr_debug("RIO: discovery timeout on mport %d %s\n",
1082 mport->id, mport->name);
1083 goto bail;
1084enum_done:
1085 pr_debug("RIO: ... enumeration done\n");
1086
1087 net = rio_scan_alloc_net(mport, 0, 0);
1088 if (!net) {
1089 printk(KERN_ERR "RIO: Failed to allocate new net\n");
1090 goto bail;
1091 }
1092
1093
1094 rio_local_read_config_32(mport, RIO_DID_CSR,
1095 &mport->host_deviceid);
1096 mport->host_deviceid = RIO_GET_DID(mport->sys_size,
1097 mport->host_deviceid);
1098
1099 if (rio_disc_peer(net, mport, RIO_ANY_DESTID(mport->sys_size),
1100 0, NULL, 0) < 0) {
1101 printk(KERN_INFO
1102 "RIO: master port %d device has failed discovery\n",
1103 mport->id);
1104 goto bail;
1105 }
1106
1107 rio_build_route_tables(net);
1108 }
1109
1110 return 0;
1111bail:
1112 return -EBUSY;
1113}
1114
1115static struct rio_scan rio_scan_ops = {
1116 .owner = THIS_MODULE,
1117 .enumerate = rio_enum_mport,
1118 .discover = rio_disc_mport,
1119};
1120
1121static bool scan;
1122module_param(scan, bool, 0);
1123MODULE_PARM_DESC(scan, "Start RapidIO network enumeration/discovery "
1124 "(default = 0)");
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140static int __init rio_basic_attach(void)
1141{
1142 if (rio_register_scan(RIO_MPORT_ANY, &rio_scan_ops))
1143 return -EIO;
1144 if (scan)
1145 rio_init_mports();
1146 return 0;
1147}
1148
1149late_initcall(rio_basic_attach);
1150
1151MODULE_DESCRIPTION("Basic RapidIO enumeration/discovery");
1152MODULE_LICENSE("GPL");
1153