1 /*
2 * Standard Hot Plug Controller Driver
3 *
4 * Copyright (C) 1995,2001 Compaq Computer Corporation
5 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
6 * Copyright (C) 2001 IBM Corp.
7 * Copyright (C) 2003-2004 Intel Corporation
8 *
9 * All rights reserved.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or (at
14 * your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
19 * NON INFRINGEMENT. See the GNU General Public License for more
20 * details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 * Send feedback to <greg@kroah.com>, <dely.l.sy@intel.com>
27 *
28 */
29
30 #include <linux/config.h>
31 #include <linux/module.h>
32 #include <linux/kernel.h>
33 #include <linux/types.h>
34 #include <linux/slab.h>
35 #include <linux/tqueue.h>
36 #include <linux/interrupt.h>
37 #include <linux/delay.h>
38 #include <linux/wait.h>
39 #include <linux/smp_lock.h>
40 #include <linux/pci.h>
41 #include "shpchp.h"
42 #include "shpchprm.h"
43
44 static u32 configure_new_device(struct controller *ctrl, struct pci_func *func,
45 u8 behind_bridge, struct resource_lists *resources, u8 bridge_bus, u8 bridge_dev);
46 static int configure_new_function( struct controller *ctrl, struct pci_func *func,
47 u8 behind_bridge, struct resource_lists *resources, u8 bridge_bus, u8 bridge_dev);
48 static void interrupt_event_handler(struct controller *ctrl);
49
50 static struct semaphore event_semaphore; /* mutex for process loop (up if something to process) */
51 static struct semaphore event_exit; /* guard ensure thread has exited before calling it quits */
52 static int event_finished;
53 static unsigned long pushbutton_pending; /* = 0 */
54
55 u8 shpchp_disk_irq;
56 u8 shpchp_nic_irq;
57
shpchp_handle_attention_button(u8 hp_slot,void * inst_id)58 u8 shpchp_handle_attention_button(u8 hp_slot, void *inst_id)
59 {
60 struct controller *ctrl = (struct controller *) inst_id;
61 struct slot *p_slot;
62 u8 rc = 0;
63 u8 getstatus;
64 struct pci_func *func;
65 struct event_info *taskInfo;
66
67 /* Attention Button Change */
68 dbg("shpchp: Attention button interrupt received.\n");
69
70 func = shpchp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0);
71
72 /* This is the structure that tells the worker thread what to do */
73 taskInfo = &(ctrl->event_queue[ctrl->next_event]);
74 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
75
76 p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
77 p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
78
79 ctrl->next_event = (ctrl->next_event + 1) % 10;
80 taskInfo->hp_slot = hp_slot;
81
82 rc++;
83
84 /*
85 * Button pressed - See if need to TAKE ACTION!!!
86 */
87 info("Button pressed on Slot(%d)\n", ctrl->first_slot + hp_slot);
88 taskInfo->event_type = INT_BUTTON_PRESS;
89
90 if ((p_slot->state == BLINKINGON_STATE)
91 || (p_slot->state == BLINKINGOFF_STATE)) {
92 /* Cancel if we are still blinking; this means that we press the
93 * attention again before the 5 sec. limit expires to cancel hot-add
94 * or hot-remove
95 */
96 taskInfo->event_type = INT_BUTTON_CANCEL;
97 info("Button cancel on Slot(%d)\n", ctrl->first_slot + hp_slot);
98 } else if ((p_slot->state == POWERON_STATE)
99 || (p_slot->state == POWEROFF_STATE)) {
100 /* Ignore if the slot is on power-on or power-off state; this
101 * means that the previous attention button action to hot-add or
102 * hot-remove is undergoing
103 */
104 taskInfo->event_type = INT_BUTTON_IGNORE;
105 info("Button ignore on Slot(%d)\n", ctrl->first_slot + hp_slot);
106 }
107
108 if (rc)
109 up(&event_semaphore); /* Signal event thread that new event is posted */
110
111 return 0;
112
113 }
114
shpchp_handle_switch_change(u8 hp_slot,void * inst_id)115 u8 shpchp_handle_switch_change(u8 hp_slot, void *inst_id)
116 {
117 struct controller *ctrl = (struct controller *) inst_id;
118 struct slot *p_slot;
119 u8 rc = 0;
120 u8 getstatus;
121 struct pci_func *func;
122 struct event_info *taskInfo;
123
124 /* Switch Change */
125 dbg("shpchp: Switch interrupt received.\n");
126
127 func = shpchp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0);
128
129 /* This is the structure that tells the worker thread
130 * what to do
131 */
132 taskInfo = &(ctrl->event_queue[ctrl->next_event]);
133 ctrl->next_event = (ctrl->next_event + 1) % 10;
134 taskInfo->hp_slot = hp_slot;
135
136 rc++;
137 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
138 p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
139 p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
140 dbg("%s: Card present %x Power status %x\n", __FUNCTION__,
141 func->presence_save, func->pwr_save);
142
143 if (getstatus) {
144 /*
145 * Switch opened
146 */
147 info("Latch open on Slot(%d)\n", ctrl->first_slot + hp_slot);
148 func->switch_save = 0;
149 taskInfo->event_type = INT_SWITCH_OPEN;
150 if (func->pwr_save && func->presence_save) {
151 taskInfo->event_type = INT_POWER_FAULT;
152 err("Surprise Removal of card\n");
153 }
154 } else {
155 /*
156 * Switch closed
157 */
158 info("Latch close on Slot(%d)\n", ctrl->first_slot + hp_slot);
159 func->switch_save = 0x10;
160 taskInfo->event_type = INT_SWITCH_CLOSE;
161 }
162
163 if (rc)
164 up(&event_semaphore); /* Signal event thread that new event is posted */
165
166 return rc;
167 }
168
shpchp_handle_presence_change(u8 hp_slot,void * inst_id)169 u8 shpchp_handle_presence_change(u8 hp_slot, void *inst_id)
170 {
171 struct controller *ctrl = (struct controller *) inst_id;
172 struct slot *p_slot;
173 u8 rc = 0;
174 struct pci_func *func;
175 struct event_info *taskInfo;
176
177 /* Presence Change */
178 dbg("shpchp: Presence/Notify input change.\n");
179
180 func = shpchp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0);
181
182 /* This is the structure that tells the worker thread
183 * what to do
184 */
185 taskInfo = &(ctrl->event_queue[ctrl->next_event]);
186 ctrl->next_event = (ctrl->next_event + 1) % 10;
187 taskInfo->hp_slot = hp_slot;
188
189 rc++;
190 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
191
192 /*
193 * Save the presence state
194 */
195 p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
196 if (func->presence_save) {
197 /*
198 * Card Present
199 */
200 info("Card present on Slot(%d)\n", ctrl->first_slot + hp_slot);
201 taskInfo->event_type = INT_PRESENCE_ON;
202 } else {
203 /*
204 * Not Present
205 */
206 info("Card not present on Slot(%d)\n", ctrl->first_slot + hp_slot);
207 taskInfo->event_type = INT_PRESENCE_OFF;
208 }
209
210 if (rc)
211 up(&event_semaphore); /* Signal event thread that new event is posted */
212
213 return rc;
214 }
215
shpchp_handle_power_fault(u8 hp_slot,void * inst_id)216 u8 shpchp_handle_power_fault(u8 hp_slot, void *inst_id)
217 {
218 struct controller *ctrl = (struct controller *) inst_id;
219 struct slot *p_slot;
220 u8 rc = 0;
221 struct pci_func *func;
222 struct event_info *taskInfo;
223
224 /* Power fault */
225 dbg("shpchp: Power fault interrupt received.\n");
226
227 func = shpchp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0);
228
229 /* This is the structure that tells the worker thread
230 * what to do
231 */
232 taskInfo = &(ctrl->event_queue[ctrl->next_event]);
233 ctrl->next_event = (ctrl->next_event + 1) % 10;
234 taskInfo->hp_slot = hp_slot;
235
236 rc++;
237 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
238
239 if ( !(p_slot->hpc_ops->query_power_fault(p_slot))) {
240 /*
241 * Power fault Cleared
242 */
243 info("Power fault cleared on Slot(%d)\n", ctrl->first_slot + hp_slot);
244 func->status = 0x00;
245 taskInfo->event_type = INT_POWER_FAULT_CLEAR;
246 } else {
247 /*
248 * Power fault
249 */
250 info("Power fault on Slot(%d)\n", ctrl->first_slot + hp_slot);
251 taskInfo->event_type = INT_POWER_FAULT;
252 /* Set power fault status for this board */
253 func->status = 0xFF;
254 info("power fault bit %x set\n", hp_slot);
255 }
256 if (rc)
257 up(&event_semaphore); /* Signal event thread that new event is posted */
258
259 return rc;
260 }
261
262
263 /*
264 * sort_by_size
265 *
266 * Sorts nodes on the list by their length.
267 * Smallest first.
268 *
269 */
sort_by_size(struct pci_resource ** head)270 static int sort_by_size(struct pci_resource **head)
271 {
272 struct pci_resource *current_res;
273 struct pci_resource *next_res;
274 int out_of_order = 1;
275
276 if (!(*head))
277 return(1);
278
279 if (!((*head)->next))
280 return(0);
281
282 while (out_of_order) {
283 out_of_order = 0;
284
285 /* Special case for swapping list head */
286 if (((*head)->next) &&
287 ((*head)->length > (*head)->next->length)) {
288 out_of_order++;
289 current_res = *head;
290 *head = (*head)->next;
291 current_res->next = (*head)->next;
292 (*head)->next = current_res;
293 }
294
295 current_res = *head;
296
297 while (current_res->next && current_res->next->next) {
298 if (current_res->next->length > current_res->next->next->length) {
299 out_of_order++;
300 next_res = current_res->next;
301 current_res->next = current_res->next->next;
302 current_res = current_res->next;
303 next_res->next = current_res->next;
304 current_res->next = next_res;
305 } else
306 current_res = current_res->next;
307 }
308 } /* End of out_of_order loop */
309
310 return(0);
311 }
312
313
314 /*
315 * sort_by_max_size
316 *
317 * Sorts nodes on the list by their length.
318 * Largest first.
319 *
320 */
sort_by_max_size(struct pci_resource ** head)321 static int sort_by_max_size(struct pci_resource **head)
322 {
323 struct pci_resource *current_res;
324 struct pci_resource *next_res;
325 int out_of_order = 1;
326
327 if (!(*head))
328 return(1);
329
330 if (!((*head)->next))
331 return(0);
332
333 while (out_of_order) {
334 out_of_order = 0;
335
336 /* Special case for swapping list head */
337 if (((*head)->next) &&
338 ((*head)->length < (*head)->next->length)) {
339 out_of_order++;
340 current_res = *head;
341 *head = (*head)->next;
342 current_res->next = (*head)->next;
343 (*head)->next = current_res;
344 }
345
346 current_res = *head;
347
348 while (current_res->next && current_res->next->next) {
349 if (current_res->next->length < current_res->next->next->length) {
350 out_of_order++;
351 next_res = current_res->next;
352 current_res->next = current_res->next->next;
353 current_res = current_res->next;
354 next_res->next = current_res->next;
355 current_res->next = next_res;
356 } else
357 current_res = current_res->next;
358 }
359 } /* End of out_of_order loop */
360
361 return(0);
362 }
363
364
365 /*
366 * do_pre_bridge_resource_split
367 *
368 * Returns zero or one node of resources that aren't in use
369 *
370 */
do_pre_bridge_resource_split(struct pci_resource ** head,struct pci_resource ** orig_head,u32 alignment)371 static struct pci_resource *do_pre_bridge_resource_split (struct pci_resource **head, struct pci_resource **orig_head, u32 alignment)
372 {
373 struct pci_resource *prevnode = NULL;
374 struct pci_resource *node;
375 struct pci_resource *split_node;
376 u32 rc;
377 u32 temp_dword;
378 dbg("do_pre_bridge_resource_split\n");
379
380 if (!(*head) || !(*orig_head))
381 return(NULL);
382
383 rc = shpchp_resource_sort_and_combine(head);
384
385 if (rc)
386 return(NULL);
387
388 if ((*head)->base != (*orig_head)->base)
389 return(NULL);
390
391 if ((*head)->length == (*orig_head)->length)
392 return(NULL);
393
394
395 /* If we got here, there the bridge requires some of the resource, but
396 * we may be able to split some off of the front
397 */
398 node = *head;
399
400 if (node->length & (alignment -1)) {
401 /* This one isn't an aligned length, so we'll make a new entry
402 * and split it up.
403 */
404 split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
405
406 if (!split_node)
407 return(NULL);
408
409 temp_dword = (node->length | (alignment-1)) + 1 - alignment;
410
411 split_node->base = node->base;
412 split_node->length = temp_dword;
413
414 node->length -= temp_dword;
415 node->base += split_node->length;
416
417 /* Put it in the list */
418 *head = split_node;
419 split_node->next = node;
420 }
421
422 if (node->length < alignment) {
423 return(NULL);
424 }
425
426 /* Now unlink it */
427 if (*head == node) {
428 *head = node->next;
429 node->next = NULL;
430 } else {
431 prevnode = *head;
432 while (prevnode->next != node)
433 prevnode = prevnode->next;
434
435 prevnode->next = node->next;
436 node->next = NULL;
437 }
438
439 return(node);
440 }
441
442
443 /*
444 * do_bridge_resource_split
445 *
446 * Returns zero or one node of resources that aren't in use
447 *
448 */
do_bridge_resource_split(struct pci_resource ** head,u32 alignment)449 static struct pci_resource *do_bridge_resource_split (struct pci_resource **head, u32 alignment)
450 {
451 struct pci_resource *prevnode = NULL;
452 struct pci_resource *node;
453 u32 rc;
454 u32 temp_dword;
455
456 if (!(*head))
457 return(NULL);
458
459 rc = shpchp_resource_sort_and_combine(head);
460
461 if (rc)
462 return(NULL);
463
464 node = *head;
465
466 while (node->next) {
467 prevnode = node;
468 node = node->next;
469 kfree(prevnode);
470 }
471
472 if (node->length < alignment) {
473 kfree(node);
474 return(NULL);
475 }
476
477 if (node->base & (alignment - 1)) {
478 /* Short circuit if adjusted size is too small */
479 temp_dword = (node->base | (alignment-1)) + 1;
480 if ((node->length - (temp_dword - node->base)) < alignment) {
481 kfree(node);
482 return(NULL);
483 }
484
485 node->length -= (temp_dword - node->base);
486 node->base = temp_dword;
487 }
488
489 if (node->length & (alignment - 1)) {
490 /* There's stuff in use after this node */
491 kfree(node);
492 return(NULL);
493 }
494
495 return(node);
496 }
497
498
499 /*
500 * get_io_resource
501 *
502 * this function sorts the resource list by size and then
503 * returns the first node of "size" length that is not in the
504 * ISA aliasing window. If it finds a node larger than "size"
505 * it will split it up.
506 *
507 * size must be a power of two.
508 */
get_io_resource(struct pci_resource ** head,u32 size)509 static struct pci_resource *get_io_resource (struct pci_resource **head, u32 size)
510 {
511 struct pci_resource *prevnode;
512 struct pci_resource *node;
513 struct pci_resource *split_node = NULL;
514 u32 temp_dword;
515
516 if (!(*head))
517 return(NULL);
518
519 if ( shpchp_resource_sort_and_combine(head) )
520 return(NULL);
521
522 if ( sort_by_size(head) )
523 return(NULL);
524
525 for (node = *head; node; node = node->next) {
526 if (node->length < size)
527 continue;
528
529 if (node->base & (size - 1)) {
530 /* This one isn't base aligned properly
531 so we'll make a new entry and split it up */
532 temp_dword = (node->base | (size-1)) + 1;
533
534 /*/ Short circuit if adjusted size is too small */
535 if ((node->length - (temp_dword - node->base)) < size)
536 continue;
537
538 split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
539
540 if (!split_node)
541 return(NULL);
542
543 split_node->base = node->base;
544 split_node->length = temp_dword - node->base;
545 node->base = temp_dword;
546 node->length -= split_node->length;
547
548 /* Put it in the list */
549 split_node->next = node->next;
550 node->next = split_node;
551 } /* End of non-aligned base */
552
553 /* Don't need to check if too small since we already did */
554 if (node->length > size) {
555 /* This one is longer than we need
556 so we'll make a new entry and split it up */
557 split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
558
559 if (!split_node)
560 return(NULL);
561
562 split_node->base = node->base + size;
563 split_node->length = node->length - size;
564 node->length = size;
565
566 /* Put it in the list */
567 split_node->next = node->next;
568 node->next = split_node;
569 } /* End of too big on top end */
570
571 /* For IO make sure it's not in the ISA aliasing space */
572 if (node->base & 0x300L)
573 continue;
574
575 /* If we got here, then it is the right size
576 Now take it out of the list */
577 if (*head == node) {
578 *head = node->next;
579 } else {
580 prevnode = *head;
581 while (prevnode->next != node)
582 prevnode = prevnode->next;
583
584 prevnode->next = node->next;
585 }
586 node->next = NULL;
587 /* Stop looping */
588 break;
589 }
590
591 return(node);
592 }
593
594
595 /*
596 * get_max_resource
597 *
598 * Gets the largest node that is at least "size" big from the
599 * list pointed to by head. It aligns the node on top and bottom
600 * to "size" alignment before returning it.
601 * J.I. modified to put max size limits of; 64M->32M->16M->8M->4M->1M
602 * This is needed to avoid allocating entire ACPI _CRS res to one child bridge/slot.
603 */
get_max_resource(struct pci_resource ** head,u32 size)604 static struct pci_resource *get_max_resource (struct pci_resource **head, u32 size)
605 {
606 struct pci_resource *max;
607 struct pci_resource *temp;
608 struct pci_resource *split_node;
609 u32 temp_dword;
610 u32 max_size[] = { 0x4000000, 0x2000000, 0x1000000, 0x0800000, 0x0400000, 0x0200000, 0x0100000, 0x00 };
611 int i;
612
613 if (!(*head))
614 return(NULL);
615
616 if (shpchp_resource_sort_and_combine(head))
617 return(NULL);
618
619 if (sort_by_max_size(head))
620 return(NULL);
621
622 for (max = *head;max; max = max->next) {
623
624 /* If not big enough we could probably just bail,
625 instead we'll continue to the next. */
626 if (max->length < size)
627 continue;
628
629 if (max->base & (size - 1)) {
630 /* this one isn't base aligned properly
631 so we'll make a new entry and split it up */
632 temp_dword = (max->base | (size-1)) + 1;
633
634 /* Short circuit if adjusted size is too small */
635 if ((max->length - (temp_dword - max->base)) < size)
636 continue;
637
638 split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
639
640 if (!split_node)
641 return(NULL);
642
643 split_node->base = max->base;
644 split_node->length = temp_dword - max->base;
645 max->base = temp_dword;
646 max->length -= split_node->length;
647
648 /* Put it next in the list */
649 split_node->next = max->next;
650 max->next = split_node;
651 }
652
653 if ((max->base + max->length) & (size - 1)) {
654 /* this one isn't end aligned properly at the top
655 so we'll make a new entry and split it up */
656 split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
657
658 if (!split_node)
659 return(NULL);
660 temp_dword = ((max->base + max->length) & ~(size - 1));
661 split_node->base = temp_dword;
662 split_node->length = max->length + max->base
663 - split_node->base;
664 max->length -= split_node->length;
665
666 /* Put it in the list */
667 split_node->next = max->next;
668 max->next = split_node;
669 }
670
671 /* Make sure it didn't shrink too much when we aligned it */
672 if (max->length < size)
673 continue;
674
675 for ( i = 0; max_size[i] > size; i++) {
676 if (max->length > max_size[i]) {
677 split_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource),
678 GFP_KERNEL);
679 if (!split_node)
680 break; /* return (NULL); */
681 split_node->base = max->base + max_size[i];
682 split_node->length = max->length - max_size[i];
683 max->length = max_size[i];
684 /* Put it next in the list */
685 split_node->next = max->next;
686 max->next = split_node;
687 break;
688 }
689 }
690
691 /* Now take it out of the list */
692 temp = (struct pci_resource*) *head;
693 if (temp == max) {
694 *head = max->next;
695 } else {
696 while (temp && temp->next != max) {
697 temp = temp->next;
698 }
699
700 temp->next = max->next;
701 }
702
703 max->next = NULL;
704 return(max);
705 }
706
707 /* If we get here, we couldn't find one */
708 return(NULL);
709 }
710
711
712 /*
713 * get_resource
714 *
715 * this function sorts the resource list by size and then
716 * returns the first node of "size" length. If it finds a node
717 * larger than "size" it will split it up.
718 *
719 * size must be a power of two.
720 */
get_resource(struct pci_resource ** head,u32 size)721 static struct pci_resource *get_resource (struct pci_resource **head, u32 size)
722 {
723 struct pci_resource *prevnode;
724 struct pci_resource *node;
725 struct pci_resource *split_node;
726 u32 temp_dword;
727
728 if (!(*head))
729 return(NULL);
730
731 if ( shpchp_resource_sort_and_combine(head) )
732 return(NULL);
733
734 if ( sort_by_size(head) )
735 return(NULL);
736
737 for (node = *head; node; node = node->next) {
738 dbg("%s: req_size =0x%x node=%p, base=0x%x, length=0x%x\n",
739 __FUNCTION__, size, node, node->base, node->length);
740 if (node->length < size)
741 continue;
742
743 if (node->base & (size - 1)) {
744 dbg("%s: not aligned\n", __FUNCTION__);
745 /* This one isn't base aligned properly
746 so we'll make a new entry and split it up */
747 temp_dword = (node->base | (size-1)) + 1;
748
749 /* Short circuit if adjusted size is too small */
750 if ((node->length - (temp_dword - node->base)) < size)
751 continue;
752
753 split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
754
755 if (!split_node)
756 return(NULL);
757
758 split_node->base = node->base;
759 split_node->length = temp_dword - node->base;
760 node->base = temp_dword;
761 node->length -= split_node->length;
762
763 /* Put it in the list */
764 split_node->next = node->next;
765 node->next = split_node;
766 } /* End of non-aligned base */
767
768 /* Don't need to check if too small since we already did */
769 if (node->length > size) {
770 dbg("%s: too big\n", __FUNCTION__);
771 /* This one is longer than we need
772 so we'll make a new entry and split it up */
773 split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
774
775 if (!split_node)
776 return(NULL);
777
778 split_node->base = node->base + size;
779 split_node->length = node->length - size;
780 node->length = size;
781
782 /* Put it in the list */
783 split_node->next = node->next;
784 node->next = split_node;
785 } /* End of too big on top end */
786
787 dbg("%s: got one!!!\n", __FUNCTION__);
788 /* If we got here, then it is the right size
789 Now take it out of the list */
790 if (*head == node) {
791 *head = node->next;
792 } else {
793 prevnode = *head;
794 while (prevnode->next != node)
795 prevnode = prevnode->next;
796
797 prevnode->next = node->next;
798 }
799 node->next = NULL;
800 /* Stop looping */
801 break;
802 }
803 return(node);
804 }
805
806
807 /*
808 * shpchp_resource_sort_and_combine
809 *
810 * Sorts all of the nodes in the list in ascending order by
811 * their base addresses. Also does garbage collection by
812 * combining adjacent nodes.
813 *
814 * returns 0 if success
815 */
shpchp_resource_sort_and_combine(struct pci_resource ** head)816 int shpchp_resource_sort_and_combine(struct pci_resource **head)
817 {
818 struct pci_resource *node1;
819 struct pci_resource *node2;
820 int out_of_order = 1;
821
822 dbg("%s: head = %p, *head = %p\n", __FUNCTION__, head, *head);
823
824 if (!(*head))
825 return(1);
826
827 dbg("*head->next = %p\n",(*head)->next);
828
829 if (!(*head)->next)
830 return(0); /* only one item on the list, already sorted! */
831
832 dbg("*head->base = 0x%x\n",(*head)->base);
833 dbg("*head->next->base = 0x%x\n",(*head)->next->base);
834 while (out_of_order) {
835 out_of_order = 0;
836
837 /* Special case for swapping list head */
838 if (((*head)->next) &&
839 ((*head)->base > (*head)->next->base)) {
840 node1 = *head;
841 (*head) = (*head)->next;
842 node1->next = (*head)->next;
843 (*head)->next = node1;
844 out_of_order++;
845 }
846
847 node1 = (*head);
848
849 while (node1->next && node1->next->next) {
850 if (node1->next->base > node1->next->next->base) {
851 out_of_order++;
852 node2 = node1->next;
853 node1->next = node1->next->next;
854 node1 = node1->next;
855 node2->next = node1->next;
856 node1->next = node2;
857 } else
858 node1 = node1->next;
859 }
860 } /* End of out_of_order loop */
861
862 node1 = *head;
863
864 while (node1 && node1->next) {
865 if ((node1->base + node1->length) == node1->next->base) {
866 /* Combine */
867 dbg("8..\n");
868 node1->length += node1->next->length;
869 node2 = node1->next;
870 node1->next = node1->next->next;
871 kfree(node2);
872 } else
873 node1 = node1->next;
874 }
875
876 return(0);
877 }
878
879
880 /**
881 * shpchp_slot_create - Creates a node and adds it to the proper bus.
882 * @busnumber - bus where new node is to be located
883 *
884 * Returns pointer to the new node or NULL if unsuccessful
885 */
shpchp_slot_create(u8 busnumber)886 struct pci_func *shpchp_slot_create(u8 busnumber)
887 {
888 struct pci_func *new_slot;
889 struct pci_func *next;
890
891 new_slot = (struct pci_func *) kmalloc(sizeof(struct pci_func), GFP_KERNEL);
892
893 if (new_slot == NULL) {
894 return(new_slot);
895 }
896
897 memset(new_slot, 0, sizeof(struct pci_func));
898
899 new_slot->next = NULL;
900 new_slot->configured = 1;
901
902 if (shpchp_slot_list[busnumber] == NULL) {
903 shpchp_slot_list[busnumber] = new_slot;
904 } else {
905 next = shpchp_slot_list[busnumber];
906 while (next->next != NULL)
907 next = next->next;
908 next->next = new_slot;
909 }
910 return(new_slot);
911 }
912
913
914 /*
915 * slot_remove - Removes a node from the linked list of slots.
916 * @old_slot: slot to remove
917 *
918 * Returns 0 if successful, !0 otherwise.
919 */
slot_remove(struct pci_func * old_slot)920 static int slot_remove(struct pci_func * old_slot)
921 {
922 struct pci_func *next;
923
924 if (old_slot == NULL)
925 return(1);
926
927 next = shpchp_slot_list[old_slot->bus];
928
929 if (next == NULL) {
930 return(1);
931 }
932
933 if (next == old_slot) {
934 shpchp_slot_list[old_slot->bus] = old_slot->next;
935 shpchp_destroy_board_resources(old_slot);
936 kfree(old_slot);
937 return(0);
938 }
939
940 while ((next->next != old_slot) && (next->next != NULL)) {
941 next = next->next;
942 }
943
944 if (next->next == old_slot) {
945 next->next = old_slot->next;
946 shpchp_destroy_board_resources(old_slot);
947 kfree(old_slot);
948 return(0);
949 } else
950 return(2);
951 }
952
953
954 /**
955 * bridge_slot_remove - Removes a node from the linked list of slots.
956 * @bridge: bridge to remove
957 *
958 * Returns 0 if successful, !0 otherwise.
959 */
bridge_slot_remove(struct pci_func * bridge)960 static int bridge_slot_remove(struct pci_func *bridge)
961 {
962 u8 subordinateBus, secondaryBus;
963 u8 tempBus;
964 struct pci_func *next;
965
966 if (bridge == NULL)
967 return(1);
968
969 secondaryBus = (bridge->config_space[0x06] >> 8) & 0xFF;
970 subordinateBus = (bridge->config_space[0x06] >> 16) & 0xFF;
971
972 for (tempBus = secondaryBus; tempBus <= subordinateBus; tempBus++) {
973 next = shpchp_slot_list[tempBus];
974
975 while (!slot_remove(next)) {
976 next = shpchp_slot_list[tempBus];
977 }
978 }
979
980 next = shpchp_slot_list[bridge->bus];
981
982 if (next == NULL) {
983 return(1);
984 }
985
986 if (next == bridge) {
987 shpchp_slot_list[bridge->bus] = bridge->next;
988 kfree(bridge);
989 return(0);
990 }
991
992 while ((next->next != bridge) && (next->next != NULL)) {
993 next = next->next;
994 }
995
996 if (next->next == bridge) {
997 next->next = bridge->next;
998 kfree(bridge);
999 return(0);
1000 } else
1001 return(2);
1002 }
1003
1004
1005 /**
1006 * shpchp_slot_find - Looks for a node by bus, and device, multiple functions accessed
1007 * @bus: bus to find
1008 * @device: device to find
1009 * @index: is 0 for first function found, 1 for the second...
1010 *
1011 * Returns pointer to the node if successful, %NULL otherwise.
1012 */
shpchp_slot_find(u8 bus,u8 device,u8 index)1013 struct pci_func *shpchp_slot_find(u8 bus, u8 device, u8 index)
1014 {
1015 int found = -1;
1016 struct pci_func *func;
1017
1018 func = shpchp_slot_list[bus];
1019
1020 if ((func == NULL) || ((func->device == device) && (index == 0)))
1021 return(func);
1022
1023 if (func->device == device)
1024 found++;
1025
1026 while (func->next != NULL) {
1027 func = func->next;
1028
1029 if (func->device == device)
1030 found++;
1031
1032 if (found == index)
1033 return(func);
1034 }
1035
1036 return(NULL);
1037 }
1038
is_bridge(struct pci_func * func)1039 static int is_bridge(struct pci_func * func)
1040 {
1041 /* Check the header type */
1042 if (((func->config_space[0x03] >> 16) & 0xFF) == 0x01) {
1043 dbg("%s: Is a bridge\n", __FUNCTION__);
1044 return 1;
1045 } else {
1046 dbg("%s: Not a bridge\n", __FUNCTION__);
1047 return 0;
1048 }
1049 }
1050
1051
1052 /* the following routines constitute the bulk of the
1053 hotplug controller logic
1054 */
1055
1056
1057 /**
1058 * board_added - Called after a board has been added to the system.
1059 *
1060 * Turns power on for the board
1061 * Configures board
1062 *
1063 */
board_added(struct pci_func * func,struct controller * ctrl)1064 static u32 board_added(struct pci_func * func, struct controller * ctrl)
1065 {
1066 u8 hp_slot, slot;
1067 u8 slots_not_empty = 0;
1068 int index;
1069 u32 temp_register = 0xFFFFFFFF;
1070 u32 retval, rc = 0;
1071 struct pci_func *new_func = NULL;
1072 struct pci_func *t_func = NULL;
1073 struct slot *p_slot, *pslot;
1074 struct resource_lists res_lists;
1075 enum pci_bus_speed adapter_speed, bus_speed, max_bus_speed;
1076 u8 pi, mode;
1077
1078 p_slot = shpchp_find_slot(ctrl, func->device);
1079 hp_slot = func->device - ctrl->slot_device_offset;
1080
1081 dbg("%s: func->device, slot_offset, hp_slot = %d, %d ,%d\n", __FUNCTION__,
1082 func->device, ctrl->slot_device_offset, hp_slot);
1083
1084 /* Wait for exclusive access to hardware */
1085 down(&ctrl->crit_sect);
1086
1087 /* Power on slot without connecting to bus */
1088 rc = p_slot->hpc_ops->power_on_slot(p_slot);
1089 if (rc) {
1090 err("%s: Failed to power on slot\n", __FUNCTION__);
1091 /* Done with exclusive hardware access */
1092 up(&ctrl->crit_sect);
1093 return -1;
1094 }
1095
1096 /* Wait for the command to complete */
1097 wait_for_ctrl_irq(ctrl);
1098
1099 rc = p_slot->hpc_ops->check_cmd_status(ctrl);
1100 if (rc) {
1101 err("%s: Failed to power on slot, error code(%d)\n", __FUNCTION__, rc);
1102 /* Done with exclusive hardware access */
1103 up(&ctrl->crit_sect);
1104 return -1;
1105 }
1106
1107 rc = p_slot->hpc_ops->get_adapter_speed(p_slot, &adapter_speed);
1108 /* 0 = PCI 33Mhz, 1 = PCI 66 Mhz, 2 = PCI-X 66 PA, 4 = PCI-X 66 ECC, */
1109 /* 5 = PCI-X 133 PA, 7 = PCI-X 133 ECC, 0xa = PCI-X 133 Mhz 266, */
1110 /* 0xd = PCI-X 133 Mhz 533 */
1111 /* This encoding is different from the one used in cur_bus_speed & */
1112 /* max_bus_speed */
1113
1114 if (rc || adapter_speed == PCI_SPEED_UNKNOWN) {
1115 err("%s: Can't get adapter speed or bus mode mismatch\n", __FUNCTION__);
1116 /* Done with exclusive hardware access */
1117 up(&ctrl->crit_sect);
1118 return WRONG_BUS_FREQUENCY;
1119 }
1120
1121 rc = p_slot->hpc_ops->get_cur_bus_speed(p_slot, &bus_speed);
1122 if (rc || bus_speed == PCI_SPEED_UNKNOWN) {
1123 err("%s: Can't get bus operation speed\n", __FUNCTION__);
1124 /* Done with exclusive hardware access */
1125 up(&ctrl->crit_sect);
1126 return WRONG_BUS_FREQUENCY;
1127 }
1128
1129 rc = p_slot->hpc_ops->get_max_bus_speed(p_slot, &max_bus_speed);
1130 if (rc || max_bus_speed == PCI_SPEED_UNKNOWN) {
1131 err("%s: Can't get max bus operation speed\n", __FUNCTION__);
1132 max_bus_speed = bus_speed;
1133 }
1134
1135 /* Done with exclusive hardware access */
1136 up(&ctrl->crit_sect);
1137
1138 rc = p_slot->hpc_ops->get_prog_int(p_slot, &pi);
1139 if (rc) {
1140 err("%s: Can't get controller programming interface, set it to 1\n", __FUNCTION__);
1141 pi = 1;
1142 }
1143
1144 if (pi == 2) {
1145 for ( slot = 0; slot < ctrl->num_slots; slot++) {
1146 if (slot != hp_slot) {
1147 pslot = shpchp_find_slot(ctrl, slot + ctrl->slot_device_offset);
1148 t_func = shpchp_slot_find(pslot->bus, pslot->device, 0);
1149 slots_not_empty |= t_func->is_a_board;
1150 }
1151 }
1152
1153 switch (adapter_speed) {
1154 case PCI_SPEED_133MHz_PCIX_533:
1155 case PCI_SPEED_133MHz_PCIX_266:
1156 if ((( bus_speed < 0xa ) || (bus_speed < 0xd)) && (max_bus_speed > bus_speed) &&
1157 ((max_bus_speed <= 0xa) || (max_bus_speed <= 0xd)) && (!slots_not_empty)) {
1158
1159 /* Wait for exclusive access to hardware */
1160 down(&ctrl->crit_sect);
1161
1162 rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, max_bus_speed);
1163 if (rc) {
1164 err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__);
1165 /* Done with exclusive hardware access */
1166 up(&ctrl->crit_sect);
1167 return WRONG_BUS_FREQUENCY;
1168 }
1169
1170 /* Wait for the command to complete */
1171 wait_for_ctrl_irq (ctrl);
1172
1173 rc = p_slot->hpc_ops->check_cmd_status(ctrl);
1174 if (rc) {
1175 err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n",
1176 __FUNCTION__);
1177 err("%s: Error code (%d)\n", __FUNCTION__, rc);
1178 /* Done with exclusive hardware access */
1179 up(&ctrl->crit_sect);
1180 return WRONG_BUS_FREQUENCY;
1181 }
1182 /* Done with exclusive hardware access */
1183 up(&ctrl->crit_sect);
1184 }
1185 break;
1186 case PCI_SPEED_133MHz_PCIX_ECC:
1187 case PCI_SPEED_133MHz_PCIX:
1188
1189 rc = p_slot->hpc_ops->get_mode1_ECC_cap(p_slot, &mode);
1190
1191 if (rc) {
1192 err("%s: PI is 1 \n", __FUNCTION__);
1193 return WRONG_BUS_FREQUENCY;
1194 }
1195
1196 if (mode) { /* Bus - Mode 1 ECC */
1197
1198 if (bus_speed > 0x7) {
1199 err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed);
1200 return WRONG_BUS_FREQUENCY;
1201 }
1202
1203 if ((bus_speed < 0x7) && (max_bus_speed <= 0x7) &&
1204 (bus_speed < max_bus_speed) && (!slots_not_empty)) {
1205
1206 /* Wait for exclusive access to hardware */
1207 down(&ctrl->crit_sect);
1208
1209 rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, max_bus_speed);
1210 if (rc) {
1211 err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__);
1212 /* Done with exclusive hardware access */
1213 up(&ctrl->crit_sect);
1214 return WRONG_BUS_FREQUENCY;
1215 }
1216
1217 /* Wait for the command to complete */
1218 wait_for_ctrl_irq (ctrl);
1219
1220 rc = p_slot->hpc_ops->check_cmd_status(ctrl);
1221 if (rc) {
1222 err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n",
1223 __FUNCTION__);
1224 err("%s: Error code (%d)\n", __FUNCTION__, rc);
1225 /* Done with exclusive hardware access */
1226 up(&ctrl->crit_sect);
1227 return WRONG_BUS_FREQUENCY;
1228 }
1229 /* Done with exclusive hardware access */
1230 up(&ctrl->crit_sect);
1231 }
1232 } else {
1233 if (bus_speed > 0x4) {
1234 err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed);
1235 return WRONG_BUS_FREQUENCY;
1236 }
1237
1238 if ((bus_speed < 0x4) && (max_bus_speed <= 0x4) &&
1239 (bus_speed < max_bus_speed) && (!slots_not_empty)) {
1240
1241 /* Wait for exclusive access to hardware */
1242 down(&ctrl->crit_sect);
1243
1244 rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, max_bus_speed);
1245 if (rc) {
1246 err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__);
1247 /* Done with exclusive hardware access */
1248 up(&ctrl->crit_sect);
1249 return WRONG_BUS_FREQUENCY;
1250 }
1251
1252 /* Wait for the command to complete */
1253 wait_for_ctrl_irq (ctrl);
1254
1255 rc = p_slot->hpc_ops->check_cmd_status(ctrl);
1256 if (rc) {
1257 err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n",
1258 __FUNCTION__);
1259 err("%s: Error code (%d)\n", __FUNCTION__, rc);
1260 /* Done with exclusive hardware access */
1261 up(&ctrl->crit_sect);
1262 return WRONG_BUS_FREQUENCY;
1263 }
1264 /* Done with exclusive hardware access */
1265 up(&ctrl->crit_sect);
1266 }
1267 }
1268 break;
1269 case PCI_SPEED_66MHz_PCIX_ECC:
1270 case PCI_SPEED_66MHz_PCIX:
1271
1272 rc = p_slot->hpc_ops->get_mode1_ECC_cap(p_slot, &mode);
1273
1274 if (rc) {
1275 err("%s: PI is 1 \n", __FUNCTION__);
1276 return WRONG_BUS_FREQUENCY;
1277 }
1278
1279 if (mode) { /* Bus - Mode 1 ECC */
1280
1281 if (bus_speed > 0x5) {
1282 err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed);
1283 return WRONG_BUS_FREQUENCY;
1284 }
1285
1286 if ((bus_speed < 0x5) && (max_bus_speed <= 0x5) &&
1287 (bus_speed < max_bus_speed) && (!slots_not_empty)) {
1288
1289 /* Wait for exclusive access to hardware */
1290 down(&ctrl->crit_sect);
1291
1292 rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, max_bus_speed);
1293 if (rc) {
1294 err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__);
1295 /* Done with exclusive hardware access */
1296 up(&ctrl->crit_sect);
1297 return WRONG_BUS_FREQUENCY;
1298 }
1299
1300 /* Wait for the command to complete */
1301 wait_for_ctrl_irq (ctrl);
1302
1303 rc = p_slot->hpc_ops->check_cmd_status(ctrl);
1304 if (rc) {
1305 err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n",
1306 __FUNCTION__);
1307 err("%s: Error code (%d)\n", __FUNCTION__, rc);
1308 /* Done with exclusive hardware access */
1309 up(&ctrl->crit_sect);
1310 return WRONG_BUS_FREQUENCY;
1311 }
1312 /* Done with exclusive hardware access */
1313 up(&ctrl->crit_sect);
1314 }
1315 } else {
1316 if (bus_speed > 0x2) {
1317 err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed);
1318 return WRONG_BUS_FREQUENCY;
1319 }
1320
1321 if ((bus_speed < 0x2) && (max_bus_speed <= 0x2) &&
1322 (bus_speed < max_bus_speed) && (!slots_not_empty)) {
1323
1324 /* Wait for exclusive access to hardware */
1325 down(&ctrl->crit_sect);
1326
1327 rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, max_bus_speed);
1328 if (rc) {
1329 err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__);
1330 /* Done with exclusive hardware access */
1331 up(&ctrl->crit_sect);
1332 return WRONG_BUS_FREQUENCY;
1333 }
1334
1335 /* Wait for the command to complete */
1336 wait_for_ctrl_irq (ctrl);
1337
1338 rc = p_slot->hpc_ops->check_cmd_status(ctrl);
1339 if (rc) {
1340 err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n",
1341 __FUNCTION__);
1342 err("%s: Error code (%d)\n", __FUNCTION__, rc);
1343 /* Done with exclusive hardware access */
1344 up(&ctrl->crit_sect);
1345 return WRONG_BUS_FREQUENCY;
1346 }
1347 /* Done with exclusive hardware access */
1348 up(&ctrl->crit_sect);
1349 }
1350 }
1351 break;
1352 case PCI_SPEED_66MHz:
1353 if (bus_speed > 0x1) {
1354 err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed);
1355 return WRONG_BUS_FREQUENCY;
1356 }
1357 if (bus_speed == 0x1)
1358 ;
1359 if ((bus_speed == 0x0) && ( max_bus_speed == 0x1)) {
1360 /* Wait for exclusive access to hardware */
1361 down(&ctrl->crit_sect);
1362
1363 rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, max_bus_speed);
1364 if (rc) {
1365 err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__);
1366 /* Done with exclusive hardware access */
1367 up(&ctrl->crit_sect);
1368 return WRONG_BUS_FREQUENCY;
1369 }
1370
1371 /* Wait for the command to complete */
1372 wait_for_ctrl_irq (ctrl);
1373
1374 rc = p_slot->hpc_ops->check_cmd_status(ctrl);
1375 if (rc) {
1376 err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n",
1377 __FUNCTION__);
1378 err("%s: Error code (%d)\n", __FUNCTION__, rc);
1379 /* Done with exclusive hardware access */
1380 up(&ctrl->crit_sect);
1381 return WRONG_BUS_FREQUENCY;
1382 }
1383 /* Done with exclusive hardware access */
1384 up(&ctrl->crit_sect);
1385 }
1386 break;
1387 case PCI_SPEED_33MHz:
1388 if (bus_speed > 0x0) {
1389 err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed);
1390 return WRONG_BUS_FREQUENCY;
1391 }
1392 break;
1393 default:
1394 err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed);
1395 return WRONG_BUS_FREQUENCY;
1396 }
1397 } else {
1398 /* if adpater_speed == bus_speed, nothing to do here */
1399 if (adapter_speed != bus_speed) {
1400 for ( slot = 0; slot < ctrl->num_slots; slot++) {
1401 if (slot != hp_slot) {
1402 pslot = shpchp_find_slot(ctrl, slot + ctrl->slot_device_offset);
1403 t_func = shpchp_slot_find(pslot->bus, pslot->device, 0);
1404 slots_not_empty |= t_func->is_a_board;
1405 }
1406 }
1407
1408 if (slots_not_empty != 0) { /* Other slots on the same bus are occupied */
1409 if ( adapter_speed < bus_speed ) {
1410 err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed);
1411 return WRONG_BUS_FREQUENCY;
1412 }
1413 /* Do nothing if adapter_speed >= bus_speed */
1414 }
1415 }
1416
1417 if ((adapter_speed != bus_speed) && (slots_not_empty == 0)) {
1418 /* Other slots on the same bus are empty */
1419
1420 rc = p_slot->hpc_ops->get_max_bus_speed(p_slot, &max_bus_speed);
1421 if (rc || max_bus_speed == PCI_SPEED_UNKNOWN) {
1422 err("%s: Can't get max bus operation speed\n", __FUNCTION__);
1423 max_bus_speed = bus_speed;
1424 }
1425
1426 if (max_bus_speed == bus_speed) {
1427 /* if adapter_speed >= bus_speed, do nothing */
1428 if (adapter_speed < bus_speed) {
1429 /*
1430 * Try to lower bus speed to accommodate the adapter if other slots
1431 * on the same controller are empty
1432 */
1433
1434 /* Wait for exclusive access to hardware */
1435 down(&ctrl->crit_sect);
1436
1437 rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, adapter_speed);
1438 if (rc) {
1439 err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__);
1440 up(&ctrl->crit_sect);
1441 return WRONG_BUS_FREQUENCY;
1442 }
1443
1444 /* Wait for the command to complete */
1445 wait_for_ctrl_irq (ctrl);
1446
1447 rc = p_slot->hpc_ops->check_cmd_status(ctrl);
1448 if (rc) {
1449 err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n",
1450 __FUNCTION__);
1451 err("%s: Error code (%d)\n", __FUNCTION__, rc);
1452 up(&ctrl->crit_sect);
1453 return WRONG_BUS_FREQUENCY;
1454 }
1455 /* Done with exclusive hardware access */
1456 up(&ctrl->crit_sect);
1457
1458 }
1459 } else {
1460 /* Wait for exclusive access to hardware */
1461 down(&ctrl->crit_sect);
1462
1463 /* max_bus_speed != bus_speed. Note: max_bus_speed should be > than bus_speed */
1464 if (adapter_speed < max_bus_speed)
1465 rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, adapter_speed);
1466 else
1467 rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, max_bus_speed);
1468
1469 if (rc) {
1470 err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__);
1471 /* Done with exclusive hardware access */
1472 up(&ctrl->crit_sect);
1473 return WRONG_BUS_FREQUENCY;
1474 }
1475
1476 /* Wait for the command to complete */
1477 wait_for_ctrl_irq (ctrl);
1478
1479 rc = p_slot->hpc_ops->check_cmd_status(ctrl);
1480 if (rc) {
1481 err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n",
1482 __FUNCTION__);
1483 err("%s: Error code (%d)\n", __FUNCTION__, rc);
1484 /* Done with exclusive hardware access */
1485 up(&ctrl->crit_sect);
1486 return WRONG_BUS_FREQUENCY;
1487 }
1488 /* Done with exclusive hardware access */
1489 up(&ctrl->crit_sect);
1490
1491 }
1492 }
1493 }
1494
1495 /* Wait for exclusive access to hardware */
1496 down(&ctrl->crit_sect);
1497
1498 /* Turn on board, blink green LED, turn off Amber LED */
1499 rc = p_slot->hpc_ops->slot_enable(p_slot);
1500
1501 if (rc) {
1502 err("%s: Issue of Slot Enable command failed\n", __FUNCTION__);
1503 /* Done with exclusive hardware access */
1504 up(&ctrl->crit_sect);
1505 return rc;
1506 }
1507 /* Wait for the command to complete */
1508 wait_for_ctrl_irq (ctrl);
1509
1510 rc = p_slot->hpc_ops->check_cmd_status(ctrl);
1511 if (rc) {
1512 err("%s: Failed to enable slot, error code(%d)\n", __FUNCTION__, rc);
1513 /* Done with exclusive hardware access */
1514 up(&ctrl->crit_sect);
1515 return rc;
1516 }
1517
1518 /* Done with exclusive hardware access */
1519 up(&ctrl->crit_sect);
1520
1521 /* Wait for ~1 second */
1522 dbg("%s: before long_delay\n", __FUNCTION__);
1523 wait_for_ctrl_irq (ctrl);
1524 dbg("%s: afterlong_delay\n", __FUNCTION__);
1525
1526 dbg("%s: func status = %x\n", __FUNCTION__, func->status);
1527 /* Check for a power fault */
1528 if (func->status == 0xFF) {
1529 /* power fault occurred, but it was benign */
1530 temp_register = 0xFFFFFFFF;
1531 dbg("%s: temp register set to %x by power fault\n", __FUNCTION__, temp_register);
1532 rc = POWER_FAILURE;
1533 func->status = 0;
1534 } else {
1535 /* Get vendor/device ID u32 */
1536 rc = pci_bus_read_config_dword (ctrl->pci_dev->subordinate, PCI_DEVFN(func->device, func->function), PCI_VENDOR_ID, &temp_register);
1537 dbg("%s: pci_bus_read_config_dword returns %d\n", __FUNCTION__, rc);
1538 dbg("%s: temp_register is %x\n", __FUNCTION__, temp_register);
1539
1540 if (rc != 0) {
1541 /* Something's wrong here */
1542 temp_register = 0xFFFFFFFF;
1543 dbg("%s: temp register set to %x by error\n", __FUNCTION__, temp_register);
1544 }
1545 /* Preset return code. It will be changed later if things go okay. */
1546 rc = NO_ADAPTER_PRESENT;
1547 }
1548
1549 /* All F's is an empty slot or an invalid board */
1550 if (temp_register != 0xFFFFFFFF) { /* Check for a board in the slot */
1551 res_lists.io_head = ctrl->io_head;
1552 res_lists.mem_head = ctrl->mem_head;
1553 res_lists.p_mem_head = ctrl->p_mem_head;
1554 res_lists.bus_head = ctrl->bus_head;
1555 res_lists.irqs = NULL;
1556
1557 rc = configure_new_device(ctrl, func, 0, &res_lists, 0, 0);
1558 dbg("%s: back from configure_new_device\n", __FUNCTION__);
1559
1560 ctrl->io_head = res_lists.io_head;
1561 ctrl->mem_head = res_lists.mem_head;
1562 ctrl->p_mem_head = res_lists.p_mem_head;
1563 ctrl->bus_head = res_lists.bus_head;
1564
1565 shpchp_resource_sort_and_combine(&(ctrl->mem_head));
1566 shpchp_resource_sort_and_combine(&(ctrl->p_mem_head));
1567 shpchp_resource_sort_and_combine(&(ctrl->io_head));
1568 shpchp_resource_sort_and_combine(&(ctrl->bus_head));
1569
1570 if (rc) {
1571 /* Wait for exclusive access to hardware */
1572 down(&ctrl->crit_sect);
1573
1574 /* turn off slot, turn on Amber LED, turn off Green LED */
1575 retval = p_slot->hpc_ops->slot_disable(p_slot);
1576 if (retval) {
1577 err("%s: Issue of Slot Enable command failed\n", __FUNCTION__);
1578 /* Done with exclusive hardware access */
1579 up(&ctrl->crit_sect);
1580 return retval;
1581 }
1582 /* Wait for the command to complete */
1583 wait_for_ctrl_irq(ctrl);
1584
1585 retval = p_slot->hpc_ops->check_cmd_status(ctrl);
1586 if (retval) {
1587 err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__, rc);
1588 /* Done with exclusive hardware access */
1589 up(&ctrl->crit_sect);
1590 return retval;
1591 }
1592
1593 /* Done with exclusive hardware access */
1594 up(&ctrl->crit_sect);
1595
1596 return(rc);
1597 }
1598 shpchp_save_slot_config(ctrl, func);
1599
1600 func->status = 0;
1601 func->switch_save = 0x10;
1602 func->is_a_board = 0x01;
1603 func->pwr_save = 1;
1604
1605 /* Next, we will instantiate the linux pci_dev structures
1606 * (with appropriate driver notification, if already present)
1607 */
1608 index = 0;
1609 do {
1610 new_func = shpchp_slot_find(ctrl->slot_bus, func->device, index++);
1611 if (new_func && !new_func->pci_dev) {
1612 dbg("%s:call pci_hp_configure_dev\n", __FUNCTION__);
1613 shpchp_configure_device(ctrl, new_func);
1614 }
1615 } while (new_func);
1616
1617 /* Wait for exclusive access to hardware */
1618 down(&ctrl->crit_sect);
1619
1620 p_slot->hpc_ops->green_led_on(p_slot);
1621
1622 /* Wait for the command to complete */
1623 wait_for_ctrl_irq(ctrl);
1624
1625
1626 /* Done with exclusive hardware access */
1627 up(&ctrl->crit_sect);
1628
1629 } else {
1630 /* Wait for exclusive access to hardware */
1631 down(&ctrl->crit_sect);
1632
1633 /* turn off slot, turn on Amber LED, turn off Green LED */
1634 rc = p_slot->hpc_ops->slot_disable(p_slot);
1635 if (rc) {
1636 err("%s: Issue of Slot Disable command failed\n", __FUNCTION__);
1637 /* Done with exclusive hardware access */
1638 up(&ctrl->crit_sect);
1639 return rc;
1640 }
1641 /* Wait for the command to complete */
1642 wait_for_ctrl_irq(ctrl);
1643
1644 rc = p_slot->hpc_ops->check_cmd_status(ctrl);
1645 if (rc) {
1646 err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__, rc);
1647 /* Done with exclusive hardware access */
1648 up(&ctrl->crit_sect);
1649 return rc;
1650 }
1651
1652 /* Done with exclusive hardware access */
1653 up(&ctrl->crit_sect);
1654
1655 return(rc);
1656 }
1657 return 0;
1658 }
1659
1660
1661 /**
1662 * remove_board - Turns off slot and LED's
1663 *
1664 */
remove_board(struct pci_func * func,struct controller * ctrl)1665 static u32 remove_board(struct pci_func *func, struct controller *ctrl)
1666 {
1667 int index;
1668 u8 skip = 0;
1669 u8 device;
1670 u8 hp_slot;
1671 u32 rc;
1672 struct resource_lists res_lists;
1673 struct pci_func *temp_func;
1674 struct slot *p_slot;
1675
1676 if (func == NULL)
1677 return(1);
1678
1679 if (shpchp_unconfigure_device(func))
1680 return(1);
1681
1682 device = func->device;
1683
1684 hp_slot = func->device - ctrl->slot_device_offset;
1685 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
1686
1687 dbg("In %s, hp_slot = %d\n", __FUNCTION__, hp_slot);
1688
1689 if ((ctrl->add_support) &&
1690 !(func->bus_head || func->mem_head || func->p_mem_head || func->io_head)) {
1691 /* Here we check to see if we've saved any of the board's
1692 * resources already. If so, we'll skip the attempt to
1693 * determine what's being used.
1694 */
1695 index = 0;
1696
1697 temp_func = func;
1698
1699 while ((temp_func = shpchp_slot_find(temp_func->bus, temp_func->device, index++))) {
1700 if (temp_func->bus_head || temp_func->mem_head
1701 || temp_func->p_mem_head || temp_func->io_head) {
1702 skip = 1;
1703 break;
1704 }
1705 }
1706
1707 if (!skip)
1708 rc = shpchp_save_used_resources(ctrl, func, DISABLE_CARD);
1709 }
1710 /* Change status to shutdown */
1711 if (func->is_a_board)
1712 func->status = 0x01;
1713 func->configured = 0;
1714
1715 /* Wait for exclusive access to hardware */
1716 down(&ctrl->crit_sect);
1717
1718 /* Turn off slot, turn on Amber LED, turn off Green LED */
1719 rc = p_slot->hpc_ops->slot_disable(p_slot);
1720 if (rc) {
1721 err("%s: Issue of Slot Disable command failed\n", __FUNCTION__);
1722 /* Done with exclusive hardware access */
1723 up(&ctrl->crit_sect);
1724 return rc;
1725 }
1726 /* Wait for the command to complete */
1727 wait_for_ctrl_irq(ctrl);
1728
1729 rc = p_slot->hpc_ops->check_cmd_status(ctrl);
1730 if (rc) {
1731 err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__, rc);
1732 /* Done with exclusive hardware access */
1733 up(&ctrl->crit_sect);
1734 return rc;
1735 }
1736
1737 rc = p_slot->hpc_ops->set_attention_status(p_slot, 0);
1738 if (rc) {
1739 err("%s: Issue of Set Attention command failed\n", __FUNCTION__);
1740 /* Done with exclusive hardware access */
1741 up(&ctrl->crit_sect);
1742 return rc;
1743 }
1744 /* Wait for the command to complete */
1745 wait_for_ctrl_irq(ctrl);
1746
1747 /* Done with exclusive hardware access */
1748 up(&ctrl->crit_sect);
1749
1750 if (ctrl->add_support) {
1751 while (func) {
1752 res_lists.io_head = ctrl->io_head;
1753 res_lists.mem_head = ctrl->mem_head;
1754 res_lists.p_mem_head = ctrl->p_mem_head;
1755 res_lists.bus_head = ctrl->bus_head;
1756
1757 dbg("Returning resources to ctlr lists for (B/D/F) = (%#x/%#x/%#x)\n",
1758 func->bus, func->device, func->function);
1759
1760 shpchp_return_board_resources(func, &res_lists);
1761
1762 ctrl->io_head = res_lists.io_head;
1763 ctrl->mem_head = res_lists.mem_head;
1764 ctrl->p_mem_head = res_lists.p_mem_head;
1765 ctrl->bus_head = res_lists.bus_head;
1766
1767 shpchp_resource_sort_and_combine(&(ctrl->mem_head));
1768 shpchp_resource_sort_and_combine(&(ctrl->p_mem_head));
1769 shpchp_resource_sort_and_combine(&(ctrl->io_head));
1770 shpchp_resource_sort_and_combine(&(ctrl->bus_head));
1771
1772 if (is_bridge(func)) {
1773 dbg("PCI Bridge Hot-Remove s:b:d:f(%02x:%02x:%02x:%02x)\n",
1774 ctrl->seg, func->bus, func->device, func->function);
1775 bridge_slot_remove(func);
1776 } else {
1777 dbg("PCI Function Hot-Remove s:b:d:f(%02x:%02x:%02x:%02x)\n",
1778 ctrl->seg, func->bus, func->device, func->function);
1779 slot_remove(func);
1780 }
1781
1782 func = shpchp_slot_find(ctrl->slot_bus, device, 0);
1783 }
1784
1785 /* Setup slot structure with entry for empty slot */
1786 func = shpchp_slot_create(ctrl->slot_bus);
1787
1788 if (func == NULL) {
1789 return(1);
1790 }
1791
1792 func->bus = ctrl->slot_bus;
1793 func->device = device;
1794 func->function = 0;
1795 func->configured = 0;
1796 func->switch_save = 0x10;
1797 func->pwr_save = 0;
1798 func->is_a_board = 0;
1799 }
1800
1801 return 0;
1802 }
1803
1804
pushbutton_helper_thread(unsigned long data)1805 static void pushbutton_helper_thread (unsigned long data)
1806 {
1807 pushbutton_pending = data;
1808
1809 up(&event_semaphore);
1810 }
1811
1812
1813 /* This is the main worker thread */
event_thread(void * data)1814 static int event_thread(void* data)
1815 {
1816 struct controller *ctrl;
1817 lock_kernel();
1818 daemonize();
1819
1820 /* New name */
1821 strcpy(current->comm, "shpchpd_event");
1822
1823 unlock_kernel();
1824
1825 while (1) {
1826 dbg("!!!!event_thread sleeping\n");
1827 down_interruptible (&event_semaphore);
1828 dbg("event_thread woken finished = %d\n", event_finished);
1829 if (event_finished || signal_pending(current))
1830 break;
1831 /* Do stuff here */
1832 if (pushbutton_pending)
1833 shpchp_pushbutton_thread(pushbutton_pending);
1834 else
1835 for (ctrl = shpchp_ctrl_list; ctrl; ctrl=ctrl->next)
1836 interrupt_event_handler(ctrl);
1837 }
1838 dbg("event_thread signals exit\n");
1839 up(&event_exit);
1840 return 0;
1841 }
1842
shpchp_event_start_thread(void)1843 int shpchp_event_start_thread (void)
1844 {
1845 int pid;
1846
1847 /* Initialize our semaphores */
1848 init_MUTEX_LOCKED(&event_exit);
1849 event_finished=0;
1850
1851 init_MUTEX_LOCKED(&event_semaphore);
1852 pid = kernel_thread(event_thread, 0, 0);
1853
1854 if (pid < 0) {
1855 err ("Can't start up our event thread\n");
1856 return -1;
1857 }
1858 dbg("Our event thread pid = %d\n", pid);
1859 return 0;
1860 }
1861
1862
shpchp_event_stop_thread(void)1863 void shpchp_event_stop_thread (void)
1864 {
1865 event_finished = 1;
1866 dbg("event_thread finish command given\n");
1867 up(&event_semaphore);
1868 dbg("wait for event_thread to exit\n");
1869 down(&event_exit);
1870 }
1871
1872
update_slot_info(struct slot * slot)1873 static int update_slot_info (struct slot *slot)
1874 {
1875 struct hotplug_slot_info *info;
1876 char buffer[SLOT_NAME_SIZE];
1877 int result;
1878
1879 info = kmalloc (sizeof (struct hotplug_slot_info), GFP_KERNEL);
1880 if (!info)
1881 return -ENOMEM;
1882
1883 make_slot_name (&buffer[0], SLOT_NAME_SIZE, slot);
1884
1885 slot->hpc_ops->get_power_status(slot, &(info->power_status));
1886 slot->hpc_ops->get_attention_status(slot, &(info->attention_status));
1887 slot->hpc_ops->get_latch_status(slot, &(info->latch_status));
1888 slot->hpc_ops->get_adapter_status(slot, &(info->adapter_status));
1889
1890 result = pci_hp_change_slot_info(buffer, info);
1891 kfree (info);
1892 return result;
1893 }
1894
interrupt_event_handler(struct controller * ctrl)1895 static void interrupt_event_handler(struct controller *ctrl)
1896 {
1897 int loop = 0;
1898 int change = 1;
1899 struct pci_func *func;
1900 u8 hp_slot;
1901 u8 getstatus;
1902 struct slot *p_slot;
1903
1904 dbg("%s:\n", __FUNCTION__);
1905 while (change) {
1906 change = 0;
1907
1908 for (loop = 0; loop < 10; loop++) {
1909 if (ctrl->event_queue[loop].event_type != 0) {
1910 dbg("%s:loop %x event_type %x\n", __FUNCTION__, loop,
1911 ctrl->event_queue[loop].event_type);
1912 hp_slot = ctrl->event_queue[loop].hp_slot;
1913
1914 func = shpchp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0);
1915
1916 p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
1917
1918 dbg("%s:hp_slot %d, func %p, p_slot %p\n", __FUNCTION__,hp_slot, func, p_slot);
1919
1920 if (ctrl->event_queue[loop].event_type == INT_BUTTON_CANCEL) {
1921 dbg("%s: button cancel\n", __FUNCTION__);
1922 del_timer(&p_slot->task_event);
1923
1924 switch (p_slot->state) {
1925 case BLINKINGOFF_STATE:
1926 /* Wait for exclusive access to hardware */
1927 down(&ctrl->crit_sect);
1928
1929 p_slot->hpc_ops->green_led_on(p_slot);
1930 /* Wait for the command to complete */
1931 wait_for_ctrl_irq(ctrl);
1932
1933 p_slot->hpc_ops->set_attention_status(p_slot, 0);
1934
1935 /* Wait for the command to complete */
1936 wait_for_ctrl_irq(ctrl);
1937
1938 /* Done with exclusive hardware access */
1939 up(&ctrl->crit_sect);
1940 break;
1941 case BLINKINGON_STATE:
1942 /* Wait for exclusive access to hardware */
1943 down(&ctrl->crit_sect);
1944
1945 p_slot->hpc_ops->green_led_off(p_slot);
1946 /* Wait for the command to complete */
1947 wait_for_ctrl_irq(ctrl);
1948
1949 p_slot->hpc_ops->set_attention_status(p_slot, 0);
1950 /* Wait for the command to complete */
1951 wait_for_ctrl_irq(ctrl);
1952
1953 /* Done with exclusive hardware access */
1954 up(&ctrl->crit_sect);
1955
1956 break;
1957 default:
1958 warn("Not a valid state\n");
1959 return;
1960 }
1961 info(msg_button_cancel, p_slot->number);
1962 p_slot->state = STATIC_STATE;
1963 }
1964 /* Button Pressed (No action on 1st press...) */
1965 else if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) {
1966 dbg("%s: Button pressed\n", __FUNCTION__);
1967
1968 p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
1969 if (getstatus) {
1970 /* slot is on */
1971 dbg("%s: slot is on\n", __FUNCTION__);
1972 p_slot->state = BLINKINGOFF_STATE;
1973 info(msg_button_off, p_slot->number);
1974 } else {
1975 /* slot is off */
1976 dbg("%s: slot is off\n", __FUNCTION__);
1977 p_slot->state = BLINKINGON_STATE;
1978 info(msg_button_on, p_slot->number);
1979 }
1980
1981 /* Wait for exclusive access to hardware */
1982 down(&ctrl->crit_sect);
1983
1984 /* blink green LED and turn off amber */
1985 p_slot->hpc_ops->green_led_blink(p_slot);
1986 /* Wait for the command to complete */
1987 wait_for_ctrl_irq(ctrl);
1988
1989 p_slot->hpc_ops->set_attention_status(p_slot, 0);
1990
1991 /* Wait for the command to complete */
1992 wait_for_ctrl_irq(ctrl);
1993
1994 /* Done with exclusive hardware access */
1995 up(&ctrl->crit_sect);
1996
1997 init_timer(&p_slot->task_event);
1998 p_slot->task_event.expires = jiffies + 5 * HZ; /* 5 second delay */
1999 p_slot->task_event.function = (void (*)(unsigned long)) pushbutton_helper_thread;
2000 p_slot->task_event.data = (unsigned long) p_slot;
2001
2002 dbg("%s: add_timer p_slot = %p\n", __FUNCTION__, (void *) p_slot);
2003 add_timer(&p_slot->task_event);
2004 }
2005 /***********POWER FAULT********************/
2006 else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) {
2007 dbg("%s: power fault\n", __FUNCTION__);
2008 /* Wait for exclusive access to hardware */
2009 down(&ctrl->crit_sect);
2010
2011 p_slot->hpc_ops->set_attention_status(p_slot, 1);
2012
2013 /* Wait for the command to complete */
2014 wait_for_ctrl_irq(ctrl);
2015
2016 p_slot->hpc_ops->green_led_off(p_slot);
2017
2018 /* Wait for the command to complete */
2019 wait_for_ctrl_irq(ctrl);
2020
2021 /* Done with exclusive hardware access */
2022 up(&ctrl->crit_sect);
2023 } else {
2024 /* refresh notification */
2025 if (p_slot)
2026 update_slot_info(p_slot);
2027 }
2028
2029 ctrl->event_queue[loop].event_type = 0;
2030
2031 change = 1;
2032 }
2033 } /* End of FOR loop */
2034 }
2035
2036 return;
2037 }
2038
2039
2040 /**
2041 * shpchp_pushbutton_thread
2042 *
2043 * Scheduled procedure to handle blocking stuff for the pushbuttons
2044 * Handles all pending events and exits.
2045 *
2046 */
shpchp_pushbutton_thread(unsigned long slot)2047 void shpchp_pushbutton_thread (unsigned long slot)
2048 {
2049 struct slot *p_slot = (struct slot *) slot;
2050 u8 getstatus;
2051
2052 pushbutton_pending = 0;
2053
2054 if (!p_slot) {
2055 dbg("%s: Error! slot NULL\n", __FUNCTION__);
2056 return;
2057 }
2058
2059 p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
2060 if (getstatus) {
2061 p_slot->state = POWEROFF_STATE;
2062 dbg("In power_down_board, b:d(%x:%x)\n", p_slot->bus, p_slot->device);
2063
2064 shpchp_disable_slot(p_slot);
2065 p_slot->state = STATIC_STATE;
2066 } else {
2067 p_slot->state = POWERON_STATE;
2068 dbg("In add_board, b:d(%x:%x)\n", p_slot->bus, p_slot->device);
2069
2070 if (shpchp_enable_slot(p_slot)) {
2071 /* Wait for exclusive access to hardware */
2072 down(&p_slot->ctrl->crit_sect);
2073
2074 p_slot->hpc_ops->green_led_off(p_slot);
2075
2076 /* Wait for the command to complete */
2077 wait_for_ctrl_irq(p_slot->ctrl);
2078
2079 /* Done with exclusive hardware access */
2080 up(&p_slot->ctrl->crit_sect);
2081 }
2082 p_slot->state = STATIC_STATE;
2083 }
2084
2085 return;
2086 }
2087
2088
shpchp_enable_slot(struct slot * p_slot)2089 int shpchp_enable_slot (struct slot *p_slot)
2090 {
2091 u8 getstatus = 0;
2092 int rc;
2093 struct pci_func *func;
2094
2095 func = shpchp_slot_find(p_slot->bus, p_slot->device, 0);
2096 if (!func) {
2097 dbg("%s: Error! slot NULL\n", __FUNCTION__);
2098 return (1);
2099 }
2100
2101 /* Check to see if (latch closed, card present, power off) */
2102 down(&p_slot->ctrl->crit_sect);
2103 rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
2104 if (rc || !getstatus) {
2105 info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
2106 up(&p_slot->ctrl->crit_sect);
2107 return (1);
2108 }
2109 rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
2110 if (rc || getstatus) {
2111 info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
2112 up(&p_slot->ctrl->crit_sect);
2113 return (1);
2114 }
2115 rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
2116 if (rc || getstatus) {
2117 info("%s: already enabled on slot(%x)\n", __FUNCTION__, p_slot->number);
2118 up(&p_slot->ctrl->crit_sect);
2119 return (1);
2120 }
2121 up(&p_slot->ctrl->crit_sect);
2122
2123 slot_remove(func);
2124
2125 func = shpchp_slot_create(p_slot->bus);
2126 if (func == NULL)
2127 return (1);
2128
2129 func->bus = p_slot->bus;
2130 func->device = p_slot->device;
2131 func->function = 0;
2132 func->configured = 0;
2133 func->is_a_board = 1;
2134
2135 /* We have to save the presence info for these slots */
2136 p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
2137 p_slot->hpc_ops->get_power_status(p_slot, &(func->pwr_save));
2138 dbg("%s: func->pwr_save %x\n", __FUNCTION__, func->pwr_save);
2139 p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
2140 func->switch_save = !getstatus? 0x10:0;
2141
2142 rc = board_added(func, p_slot->ctrl);
2143 if (rc) {
2144 if (is_bridge(func))
2145 bridge_slot_remove(func);
2146 else
2147 slot_remove(func);
2148
2149 /* Setup slot structure with entry for empty slot */
2150 func = shpchp_slot_create(p_slot->bus);
2151 if (func == NULL)
2152 return (1); /* Out of memory */
2153
2154 func->bus = p_slot->bus;
2155 func->device = p_slot->device;
2156 func->function = 0;
2157 func->configured = 0;
2158 func->is_a_board = 1;
2159
2160 /* We have to save the presence info for these slots */
2161 p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
2162 p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
2163 func->switch_save = !getstatus? 0x10:0;
2164 }
2165
2166 if (p_slot)
2167 update_slot_info(p_slot);
2168
2169 return rc;
2170 }
2171
2172
shpchp_disable_slot(struct slot * p_slot)2173 int shpchp_disable_slot (struct slot *p_slot)
2174 {
2175 u8 class_code, header_type, BCR;
2176 u8 index = 0;
2177 u8 getstatus = 0;
2178 u32 rc = 0;
2179 int ret = 0;
2180 unsigned int devfn;
2181 struct pci_bus *pci_bus = p_slot->ctrl->pci_dev->subordinate;
2182 struct pci_func *func;
2183
2184 if (!p_slot->ctrl)
2185 return (1);
2186
2187 /* Check to see if (latch closed, card present, power on) */
2188 down(&p_slot->ctrl->crit_sect);
2189
2190 ret = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
2191 if (ret || !getstatus) {
2192 info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
2193 up(&p_slot->ctrl->crit_sect);
2194 return (1);
2195 }
2196 ret = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
2197 if (ret || getstatus) {
2198 info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
2199 up(&p_slot->ctrl->crit_sect);
2200 return (1);
2201 }
2202 ret = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
2203 if (ret || !getstatus) {
2204 info("%s: already disabled slot(%x)\n", __FUNCTION__, p_slot->number);
2205 up(&p_slot->ctrl->crit_sect);
2206 return (1);
2207 }
2208 up(&p_slot->ctrl->crit_sect);
2209
2210 func = shpchp_slot_find(p_slot->bus, p_slot->device, index++);
2211
2212 /* Make sure there are no video controllers here
2213 * for all func of p_slot
2214 */
2215 while (func && !rc) {
2216 pci_bus->number = func->bus;
2217 devfn = PCI_DEVFN(func->device, func->function);
2218
2219 /* Check the Class Code */
2220 rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code);
2221 if (rc)
2222 return rc;
2223
2224 if (class_code == PCI_BASE_CLASS_DISPLAY) {
2225 /* Display/Video adapter (not supported) */
2226 rc = REMOVE_NOT_SUPPORTED;
2227 } else {
2228 /* See if it's a bridge */
2229 rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type);
2230 if (rc)
2231 return rc;
2232
2233 /* If it's a bridge, check the VGA Enable bit */
2234 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
2235 rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_BRIDGE_CONTROL, &BCR);
2236 if (rc)
2237 return rc;
2238
2239 /* If the VGA Enable bit is set, remove isn't supported */
2240 if (BCR & PCI_BRIDGE_CTL_VGA) {
2241 rc = REMOVE_NOT_SUPPORTED;
2242 }
2243 }
2244 }
2245
2246 func = shpchp_slot_find(p_slot->bus, p_slot->device, index++);
2247 }
2248
2249 func = shpchp_slot_find(p_slot->bus, p_slot->device, 0);
2250 if ((func != NULL) && !rc) {
2251 rc = remove_board(func, p_slot->ctrl);
2252 } else if (!rc)
2253 rc = 1;
2254
2255 if (p_slot)
2256 update_slot_info(p_slot);
2257
2258 return(rc);
2259 }
2260
2261
2262 /**
2263 * configure_new_device - Configures the PCI header information of one board.
2264 *
2265 * @ctrl: pointer to controller structure
2266 * @func: pointer to function structure
2267 * @behind_bridge: 1 if this is a recursive call, 0 if not
2268 * @resources: pointer to set of resource lists
2269 *
2270 * Returns 0 if success
2271 *
2272 */
configure_new_device(struct controller * ctrl,struct pci_func * func,u8 behind_bridge,struct resource_lists * resources,u8 bridge_bus,u8 bridge_dev)2273 static u32 configure_new_device (struct controller * ctrl, struct pci_func * func,
2274 u8 behind_bridge, struct resource_lists * resources, u8 bridge_bus, u8 bridge_dev)
2275 {
2276 u8 temp_byte, function, max_functions, stop_it;
2277 int rc;
2278 u32 ID;
2279 struct pci_func *new_slot;
2280 struct pci_bus lpci_bus, *pci_bus;
2281 int index;
2282
2283 new_slot = func;
2284
2285 dbg("%s\n", __FUNCTION__);
2286 memcpy(&lpci_bus, ctrl->pci_dev->subordinate, sizeof(lpci_bus));
2287 pci_bus = &lpci_bus;
2288 pci_bus->number = func->bus;
2289
2290 /* Check for Multi-function device */
2291 rc = pci_bus_read_config_byte(pci_bus, PCI_DEVFN(func->device, func->function), 0x0E, &temp_byte);
2292 if (rc) {
2293 dbg("%s: rc = %d\n", __FUNCTION__, rc);
2294 return rc;
2295 }
2296
2297 if (temp_byte & 0x80) /* Multi-function device */
2298 max_functions = 8;
2299 else
2300 max_functions = 1;
2301
2302 function = 0;
2303
2304 do {
2305 rc = configure_new_function(ctrl, new_slot, behind_bridge, resources, bridge_bus, bridge_dev);
2306
2307 if (rc) {
2308 dbg("configure_new_function failed %d\n",rc);
2309 index = 0;
2310
2311 while (new_slot) {
2312 new_slot = shpchp_slot_find(new_slot->bus, new_slot->device, index++);
2313
2314 if (new_slot)
2315 shpchp_return_board_resources(new_slot, resources);
2316 }
2317
2318 return(rc);
2319 }
2320
2321 function++;
2322
2323 stop_it = 0;
2324
2325 /* The following loop skips to the next present function
2326 * and creates a board structure
2327 */
2328
2329 while ((function < max_functions) && (!stop_it)) {
2330 pci_bus_read_config_dword(pci_bus, PCI_DEVFN(func->device, function), 0x00, &ID);
2331
2332 if (ID == 0xFFFFFFFF) { /* There's nothing there. */
2333 function++;
2334 } else { /* There's something there */
2335 /* Setup slot structure. */
2336 new_slot = shpchp_slot_create(func->bus);
2337
2338 if (new_slot == NULL) {
2339 /* Out of memory */
2340 return(1);
2341 }
2342
2343 new_slot->bus = func->bus;
2344 new_slot->device = func->device;
2345 new_slot->function = function;
2346 new_slot->is_a_board = 1;
2347 new_slot->status = 0;
2348
2349 stop_it++;
2350 }
2351 }
2352
2353 } while (function < max_functions);
2354 dbg("returning from configure_new_device\n");
2355
2356 return 0;
2357 }
2358
2359
2360 /*
2361 * Configuration logic that involves the hotplug data structures and
2362 * their bookkeeping
2363 */
2364
2365
2366 /**
2367 * configure_new_function - Configures the PCI header information of one device
2368 *
2369 * @ctrl: pointer to controller structure
2370 * @func: pointer to function structure
2371 * @behind_bridge: 1 if this is a recursive call, 0 if not
2372 * @resources: pointer to set of resource lists
2373 *
2374 * Calls itself recursively for bridged devices.
2375 * Returns 0 if success
2376 *
2377 */
configure_new_function(struct controller * ctrl,struct pci_func * func,u8 behind_bridge,struct resource_lists * resources,u8 bridge_bus,u8 bridge_dev)2378 static int configure_new_function (struct controller * ctrl, struct pci_func * func,
2379 u8 behind_bridge, struct resource_lists *resources, u8 bridge_bus, u8 bridge_dev)
2380 {
2381 int cloop;
2382 u8 temp_byte;
2383 u8 device;
2384 u8 class_code;
2385 u16 temp_word;
2386 u32 rc;
2387 u32 temp_register;
2388 u32 base;
2389 u32 ID;
2390 unsigned int devfn;
2391 struct pci_resource *mem_node;
2392 struct pci_resource *p_mem_node;
2393 struct pci_resource *io_node;
2394 struct pci_resource *bus_node;
2395 struct pci_resource *hold_mem_node;
2396 struct pci_resource *hold_p_mem_node;
2397 struct pci_resource *hold_IO_node;
2398 struct pci_resource *hold_bus_node;
2399 struct irq_mapping irqs;
2400 struct pci_func *new_slot;
2401 struct pci_bus lpci_bus, *pci_bus;
2402 struct resource_lists temp_resources;
2403 #if defined(CONFIG_X86_64)
2404 u8 IRQ = 0;
2405 #endif
2406
2407 memcpy(&lpci_bus, ctrl->pci_dev->subordinate, sizeof(lpci_bus));
2408 pci_bus = &lpci_bus;
2409 pci_bus->number = func->bus;
2410 devfn = PCI_DEVFN(func->device, func->function);
2411
2412 /* Check for Bridge */
2413 rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &temp_byte);
2414 if (rc)
2415 return rc;
2416
2417 if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { /* PCI-PCI Bridge */
2418 /* set Primary bus */
2419 dbg("set Primary bus = 0x%x\n", func->bus);
2420 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_PRIMARY_BUS, func->bus);
2421 if (rc)
2422 return rc;
2423
2424 /* find range of busses to use */
2425 bus_node = get_max_resource(&resources->bus_head, 1L);
2426
2427 /* If we don't have any busses to allocate, we can't continue */
2428 if (!bus_node) {
2429 err("Got NO bus resource to use\n");
2430 return -ENOMEM;
2431 }
2432 dbg("Got ranges of buses to use: base:len=0x%x:%x\n", bus_node->base, bus_node->length);
2433
2434 /* set Secondary bus */
2435 temp_byte = (u8)bus_node->base;
2436 dbg("set Secondary bus = 0x%x\n", temp_byte);
2437 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SECONDARY_BUS, temp_byte);
2438 if (rc)
2439 return rc;
2440
2441 /* set subordinate bus */
2442 temp_byte = (u8)(bus_node->base + bus_node->length - 1);
2443 dbg("set subordinate bus = 0x%x\n", temp_byte);
2444 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte);
2445 if (rc)
2446 return rc;
2447
2448 /* Set HP parameters (Cache Line Size, Latency Timer) */
2449 rc = shpchprm_set_hpp(ctrl, func, PCI_HEADER_TYPE_BRIDGE);
2450 if (rc)
2451 return rc;
2452
2453 /* Setup the IO, memory, and prefetchable windows */
2454
2455 io_node = get_max_resource(&(resources->io_head), 0x1000L);
2456 if (io_node) {
2457 dbg("io_node(base, len, next) (%x, %x, %p)\n", io_node->base, io_node->length, io_node->next);
2458 }
2459
2460 mem_node = get_max_resource(&(resources->mem_head), 0x100000L);
2461 if (mem_node) {
2462 dbg("mem_node(base, len, next) (%x, %x, %p)\n", mem_node->base, mem_node->length, mem_node->next);
2463 }
2464
2465 if (resources->p_mem_head)
2466 p_mem_node = get_max_resource(&(resources->p_mem_head), 0x100000L);
2467 else {
2468 /*
2469 * In some platform implementation, MEM and PMEM are not
2470 * distinguished, and hence ACPI _CRS has only MEM entries
2471 * for both MEM and PMEM.
2472 */
2473 dbg("using MEM for PMEM\n");
2474 p_mem_node = get_max_resource(&(resources->mem_head), 0x100000L);
2475 }
2476 if (p_mem_node) {
2477 dbg("p_mem_node(base, len, next) (%x, %x, %p)\n", p_mem_node->base, p_mem_node->length, p_mem_node->next);
2478 }
2479
2480 /* Set up the IRQ info */
2481 if (!resources->irqs) {
2482 irqs.barber_pole = 0;
2483 irqs.interrupt[0] = 0;
2484 irqs.interrupt[1] = 0;
2485 irqs.interrupt[2] = 0;
2486 irqs.interrupt[3] = 0;
2487 irqs.valid_INT = 0;
2488 } else {
2489 irqs.barber_pole = resources->irqs->barber_pole;
2490 irqs.interrupt[0] = resources->irqs->interrupt[0];
2491 irqs.interrupt[1] = resources->irqs->interrupt[1];
2492 irqs.interrupt[2] = resources->irqs->interrupt[2];
2493 irqs.interrupt[3] = resources->irqs->interrupt[3];
2494 irqs.valid_INT = resources->irqs->valid_INT;
2495 }
2496
2497 /* Set up resource lists that are now aligned on top and bottom
2498 * for anything behind the bridge.
2499 */
2500 temp_resources.bus_head = bus_node;
2501 temp_resources.io_head = io_node;
2502 temp_resources.mem_head = mem_node;
2503 temp_resources.p_mem_head = p_mem_node;
2504 temp_resources.irqs = &irqs;
2505
2506 /* Make copies of the nodes we are going to pass down so that
2507 * if there is a problem,we can just use these to free resources
2508 */
2509 hold_bus_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
2510 hold_IO_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
2511 hold_mem_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
2512 hold_p_mem_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
2513
2514 if (!hold_bus_node || !hold_IO_node || !hold_mem_node || !hold_p_mem_node) {
2515 if (hold_bus_node)
2516 kfree(hold_bus_node);
2517 if (hold_IO_node)
2518 kfree(hold_IO_node);
2519 if (hold_mem_node)
2520 kfree(hold_mem_node);
2521 if (hold_p_mem_node)
2522 kfree(hold_p_mem_node);
2523
2524 return(1);
2525 }
2526
2527 memcpy(hold_bus_node, bus_node, sizeof(struct pci_resource));
2528
2529 bus_node->base += 1;
2530 bus_node->length -= 1;
2531 bus_node->next = NULL;
2532
2533 /* If we have IO resources copy them and fill in the bridge's
2534 * IO range registers
2535 */
2536 if (io_node) {
2537 memcpy(hold_IO_node, io_node, sizeof(struct pci_resource));
2538 io_node->next = NULL;
2539
2540 /* Set IO base and Limit registers */
2541 RES_CHECK(io_node->base, 8);
2542 temp_byte = (u8)(io_node->base >> 8);
2543 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_IO_BASE, temp_byte);
2544
2545 RES_CHECK(io_node->base + io_node->length - 1, 8);
2546 temp_byte = (u8)((io_node->base + io_node->length - 1) >> 8);
2547 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
2548 } else {
2549 kfree(hold_IO_node);
2550 hold_IO_node = NULL;
2551 }
2552
2553 /* If we have memory resources copy them and fill in the bridge's
2554 * memory range registers. Otherwise, fill in the range
2555 * registers with values that disable them.
2556 */
2557 if (mem_node) {
2558 memcpy(hold_mem_node, mem_node, sizeof(struct pci_resource));
2559 mem_node->next = NULL;
2560
2561 /* Set Mem base and Limit registers */
2562 RES_CHECK(mem_node->base, 16);
2563 temp_word = (u32)(mem_node->base >> 16);
2564 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_BASE, temp_word);
2565
2566 RES_CHECK(mem_node->base + mem_node->length - 1, 16);
2567 temp_word = (u32)((mem_node->base + mem_node->length - 1) >> 16);
2568 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2569 } else {
2570 temp_word = 0xFFFF;
2571 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_BASE, temp_word);
2572
2573 temp_word = 0x0000;
2574 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2575
2576 kfree(hold_mem_node);
2577 hold_mem_node = NULL;
2578 }
2579
2580 /* If we have prefetchable memory resources copy them and
2581 * fill in the bridge's memory range registers. Otherwise,
2582 * fill in the range registers with values that disable them.
2583 */
2584 if (p_mem_node) {
2585 memcpy(hold_p_mem_node, p_mem_node, sizeof(struct pci_resource));
2586 p_mem_node->next = NULL;
2587
2588 /* Set Pre Mem base and Limit registers */
2589 RES_CHECK(p_mem_node->base, 16);
2590 temp_word = (u32)(p_mem_node->base >> 16);
2591 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word);
2592
2593 RES_CHECK(p_mem_node->base + p_mem_node->length - 1, 16);
2594 temp_word = (u32)((p_mem_node->base + p_mem_node->length - 1) >> 16);
2595 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2596 } else {
2597 temp_word = 0xFFFF;
2598 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word);
2599
2600 temp_word = 0x0000;
2601 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2602
2603 kfree(hold_p_mem_node);
2604 hold_p_mem_node = NULL;
2605 }
2606
2607 /* Adjust this to compensate for extra adjustment in first loop */
2608 irqs.barber_pole--;
2609
2610 rc = 0;
2611
2612 /* Here we actually find the devices and configure them */
2613 for (device = 0; (device <= 0x1F) && !rc; device++) {
2614 irqs.barber_pole = (irqs.barber_pole + 1) & 0x03;
2615
2616 ID = 0xFFFFFFFF;
2617 pci_bus->number = hold_bus_node->base;
2618 pci_bus_read_config_dword (pci_bus, PCI_DEVFN(device, 0), PCI_VENDOR_ID, &ID);
2619 pci_bus->number = func->bus;
2620
2621 if (ID != 0xFFFFFFFF) { /* device Present */
2622 /* Setup slot structure. */
2623 new_slot = shpchp_slot_create(hold_bus_node->base);
2624
2625 if (new_slot == NULL) {
2626 /* Out of memory */
2627 rc = -ENOMEM;
2628 continue;
2629 }
2630
2631 new_slot->bus = hold_bus_node->base;
2632 new_slot->device = device;
2633 new_slot->function = 0;
2634 new_slot->is_a_board = 1;
2635 new_slot->status = 0;
2636
2637 rc = configure_new_device(ctrl, new_slot, 1, &temp_resources, func->bus, func->device);
2638 dbg("configure_new_device rc=0x%x\n",rc);
2639 } /* End of IF (device in slot?) */
2640 } /* End of FOR loop */
2641
2642 if (rc) {
2643 shpchp_destroy_resource_list(&temp_resources);
2644
2645 return_resource(&(resources->bus_head), hold_bus_node);
2646 return_resource(&(resources->io_head), hold_IO_node);
2647 return_resource(&(resources->mem_head), hold_mem_node);
2648 return_resource(&(resources->p_mem_head), hold_p_mem_node);
2649 return(rc);
2650 }
2651
2652 /* save the interrupt routing information */
2653 if (resources->irqs) {
2654 resources->irqs->interrupt[0] = irqs.interrupt[0];
2655 resources->irqs->interrupt[1] = irqs.interrupt[1];
2656 resources->irqs->interrupt[2] = irqs.interrupt[2];
2657 resources->irqs->interrupt[3] = irqs.interrupt[3];
2658 resources->irqs->valid_INT = irqs.valid_INT;
2659 } else if (!behind_bridge) {
2660 /* We need to hook up the interrupts here */
2661 for (cloop = 0; cloop < 4; cloop++) {
2662 if (irqs.valid_INT & (0x01 << cloop)) {
2663 rc = shpchp_set_irq(func->bus, func->device,
2664 0x0A + cloop, irqs.interrupt[cloop]);
2665 if (rc) {
2666 shpchp_destroy_resource_list (&temp_resources);
2667 return_resource(&(resources->bus_head), hold_bus_node);
2668 return_resource(&(resources->io_head), hold_IO_node);
2669 return_resource(&(resources->mem_head), hold_mem_node);
2670 return_resource(&(resources->p_mem_head), hold_p_mem_node);
2671 return rc;
2672 }
2673 }
2674 } /* end of for loop */
2675 }
2676
2677 /* Return unused bus resources
2678 * First use the temporary node to store information for the board
2679 */
2680 if (hold_bus_node && bus_node && temp_resources.bus_head) {
2681 hold_bus_node->length = bus_node->base - hold_bus_node->base;
2682
2683 hold_bus_node->next = func->bus_head;
2684 func->bus_head = hold_bus_node;
2685
2686 temp_byte = (u8)(temp_resources.bus_head->base - 1);
2687
2688 /* set subordinate bus */
2689 dbg("re-set subordinate bus = 0x%x\n", temp_byte);
2690 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte);
2691
2692 if (temp_resources.bus_head->length == 0) {
2693 kfree(temp_resources.bus_head);
2694 temp_resources.bus_head = NULL;
2695 } else {
2696 dbg("return bus res of b:d(0x%x:%x) base:len(0x%x:%x)\n",
2697 func->bus, func->device, temp_resources.bus_head->base, temp_resources.bus_head->length);
2698 return_resource(&(resources->bus_head), temp_resources.bus_head);
2699 }
2700 }
2701
2702 /* If we have IO space available and there is some left,
2703 * return the unused portion
2704 */
2705 if (hold_IO_node && temp_resources.io_head) {
2706 io_node = do_pre_bridge_resource_split(&(temp_resources.io_head),
2707 &hold_IO_node, 0x1000);
2708
2709 /* Check if we were able to split something off */
2710 if (io_node) {
2711 hold_IO_node->base = io_node->base + io_node->length;
2712
2713 RES_CHECK(hold_IO_node->base, 8);
2714 temp_byte = (u8)((hold_IO_node->base) >> 8);
2715 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_IO_BASE, temp_byte);
2716
2717 return_resource(&(resources->io_head), io_node);
2718 }
2719
2720 io_node = do_bridge_resource_split(&(temp_resources.io_head), 0x1000);
2721
2722 /* Check if we were able to split something off */
2723 if (io_node) {
2724 /* First use the temporary node to store information for the board */
2725 hold_IO_node->length = io_node->base - hold_IO_node->base;
2726
2727 /* If we used any, add it to the board's list */
2728 if (hold_IO_node->length) {
2729 hold_IO_node->next = func->io_head;
2730 func->io_head = hold_IO_node;
2731
2732 RES_CHECK(io_node->base - 1, 8);
2733 temp_byte = (u8)((io_node->base - 1) >> 8);
2734 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
2735
2736 return_resource(&(resources->io_head), io_node);
2737 } else {
2738 /* it doesn't need any IO */
2739 temp_byte = 0x00;
2740 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
2741
2742 return_resource(&(resources->io_head), io_node);
2743 kfree(hold_IO_node);
2744 }
2745 } else {
2746 /* It used most of the range */
2747 hold_IO_node->next = func->io_head;
2748 func->io_head = hold_IO_node;
2749 }
2750 } else if (hold_IO_node) {
2751 /* it used the whole range */
2752 hold_IO_node->next = func->io_head;
2753 func->io_head = hold_IO_node;
2754 }
2755
2756 /* If we have memory space available and there is some left,
2757 * return the unused portion
2758 */
2759 if (hold_mem_node && temp_resources.mem_head) {
2760 mem_node = do_pre_bridge_resource_split(&(temp_resources.mem_head), &hold_mem_node, 0x100000L);
2761
2762 /* Check if we were able to split something off */
2763 if (mem_node) {
2764 hold_mem_node->base = mem_node->base + mem_node->length;
2765
2766 RES_CHECK(hold_mem_node->base, 16);
2767 temp_word = (u32)((hold_mem_node->base) >> 16);
2768 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_BASE, temp_word);
2769
2770 return_resource(&(resources->mem_head), mem_node);
2771 }
2772
2773 mem_node = do_bridge_resource_split(&(temp_resources.mem_head), 0x100000L);
2774
2775 /* Check if we were able to split something off */
2776 if (mem_node) {
2777 /* First use the temporary node to store information for the board */
2778 hold_mem_node->length = mem_node->base - hold_mem_node->base;
2779
2780 if (hold_mem_node->length) {
2781 hold_mem_node->next = func->mem_head;
2782 func->mem_head = hold_mem_node;
2783
2784 /* configure end address */
2785 RES_CHECK(mem_node->base - 1, 16);
2786 temp_word = (u32)((mem_node->base - 1) >> 16);
2787 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2788
2789 /* Return unused resources to the pool */
2790 return_resource(&(resources->mem_head), mem_node);
2791 } else {
2792 /* it doesn't need any Mem */
2793 temp_word = 0x0000;
2794 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2795
2796 return_resource(&(resources->mem_head), mem_node);
2797 kfree(hold_mem_node);
2798 }
2799 } else {
2800 /* It used most of the range */
2801 hold_mem_node->next = func->mem_head;
2802 func->mem_head = hold_mem_node;
2803 }
2804 } else if (hold_mem_node) {
2805 /* It used the whole range */
2806 hold_mem_node->next = func->mem_head;
2807 func->mem_head = hold_mem_node;
2808 }
2809
2810 /* If we have prefetchable memory space available and there is some
2811 * left at the end, return the unused portion
2812 */
2813 if (hold_p_mem_node && temp_resources.p_mem_head) {
2814 p_mem_node = do_pre_bridge_resource_split(&(temp_resources.p_mem_head),
2815 &hold_p_mem_node, 0x100000L);
2816
2817 /* Check if we were able to split something off */
2818 if (p_mem_node) {
2819 hold_p_mem_node->base = p_mem_node->base + p_mem_node->length;
2820
2821 RES_CHECK(hold_p_mem_node->base, 16);
2822 temp_word = (u32)((hold_p_mem_node->base) >> 16);
2823 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word);
2824
2825 return_resource(&(resources->p_mem_head), p_mem_node);
2826 }
2827
2828 p_mem_node = do_bridge_resource_split(&(temp_resources.p_mem_head), 0x100000L);
2829
2830 /* Check if we were able to split something off */
2831 if (p_mem_node) {
2832 /* First use the temporary node to store information for the board */
2833 hold_p_mem_node->length = p_mem_node->base - hold_p_mem_node->base;
2834
2835 /* If we used any, add it to the board's list */
2836 if (hold_p_mem_node->length) {
2837 hold_p_mem_node->next = func->p_mem_head;
2838 func->p_mem_head = hold_p_mem_node;
2839
2840 RES_CHECK(p_mem_node->base - 1, 16);
2841 temp_word = (u32)((p_mem_node->base - 1) >> 16);
2842 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2843
2844 return_resource(&(resources->p_mem_head), p_mem_node);
2845 } else {
2846 /* It doesn't need any PMem */
2847 temp_word = 0x0000;
2848 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2849
2850 return_resource(&(resources->p_mem_head), p_mem_node);
2851 kfree(hold_p_mem_node);
2852 }
2853 } else {
2854 /* It used the most of the range */
2855 hold_p_mem_node->next = func->p_mem_head;
2856 func->p_mem_head = hold_p_mem_node;
2857 }
2858 } else if (hold_p_mem_node) {
2859 /* It used the whole range */
2860 hold_p_mem_node->next = func->p_mem_head;
2861 func->p_mem_head = hold_p_mem_node;
2862 }
2863
2864 /* We should be configuring an IRQ and the bridge's base address
2865 * registers if it needs them. Although we have never seen such
2866 * a device
2867 */
2868
2869 shpchprm_enable_card(ctrl, func, PCI_HEADER_TYPE_BRIDGE);
2870
2871 dbg("PCI Bridge Hot-Added s:b:d:f(%02x:%02x:%02x:%02x)\n", ctrl->seg,
2872 func->bus, func->device, func->function);
2873 } else if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_NORMAL) {
2874 /* Standard device */
2875 u64 base64;
2876 rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code);
2877
2878 if (class_code == PCI_BASE_CLASS_DISPLAY)
2879 return (DEVICE_TYPE_NOT_SUPPORTED);
2880
2881 /* Figure out IO and memory needs */
2882 for (cloop = PCI_BASE_ADDRESS_0; cloop <= PCI_BASE_ADDRESS_5; cloop += 4) {
2883 temp_register = 0xFFFFFFFF;
2884
2885 rc = pci_bus_write_config_dword (pci_bus, devfn, cloop, temp_register);
2886 rc = pci_bus_read_config_dword(pci_bus, devfn, cloop, &temp_register);
2887 dbg("Bar[%x]=0x%x on bus:dev:func(0x%x:%x:%x)\n", cloop, temp_register,
2888 func->bus, func->device, func->function);
2889
2890 if (!temp_register)
2891 continue;
2892
2893 base64 = 0L;
2894 if (temp_register & PCI_BASE_ADDRESS_SPACE_IO) {
2895 /* Map IO */
2896
2897 /* Set base = amount of IO space */
2898 base = temp_register & 0xFFFFFFFC;
2899 base = ~base + 1;
2900
2901 dbg("NEED IO length(0x%x)\n", base);
2902 io_node = get_io_resource(&(resources->io_head),(ulong)base);
2903
2904 /* Allocate the resource to the board */
2905 if (io_node) {
2906 dbg("Got IO base=0x%x(length=0x%x)\n", io_node->base, io_node->length);
2907 base = (u32)io_node->base;
2908 io_node->next = func->io_head;
2909 func->io_head = io_node;
2910 } else {
2911 err("Got NO IO resource(length=0x%x)\n", base);
2912 return -ENOMEM;
2913 }
2914 } else { /* Map MEM */
2915 int prefetchable = 1;
2916 struct pci_resource **res_node = &func->p_mem_head;
2917 char *res_type_str = "PMEM";
2918 u32 temp_register2;
2919
2920 if (!(temp_register & PCI_BASE_ADDRESS_MEM_PREFETCH)) {
2921 prefetchable = 0;
2922 res_node = &func->mem_head;
2923 res_type_str++;
2924 }
2925
2926 base = temp_register & 0xFFFFFFF0;
2927 base = ~base + 1;
2928
2929 switch (temp_register & PCI_BASE_ADDRESS_MEM_TYPE_MASK) {
2930 case PCI_BASE_ADDRESS_MEM_TYPE_32:
2931 dbg("NEED 32 %s bar=0x%x(length=0x%x)\n", res_type_str, temp_register, base);
2932
2933 if (prefetchable && resources->p_mem_head)
2934 mem_node=get_resource(&(resources->p_mem_head), (ulong)base);
2935 else {
2936 if (prefetchable)
2937 dbg("using MEM for PMEM\n");
2938 mem_node=get_resource(&(resources->mem_head), (ulong)base);
2939 }
2940
2941 /* Allocate the resource to the board */
2942 if (mem_node) {
2943 base = (u32)mem_node->base;
2944 mem_node->next = *res_node;
2945 *res_node = mem_node;
2946 dbg("Got 32 %s base=0x%x(length=0x%x)\n", res_type_str, mem_node->base, mem_node->length);
2947 } else {
2948 err("Got NO 32 %s resource(length=0x%x)\n", res_type_str, base);
2949 return -ENOMEM;
2950 }
2951 break;
2952 case PCI_BASE_ADDRESS_MEM_TYPE_64:
2953 rc = pci_bus_read_config_dword(pci_bus, devfn, cloop+4, &temp_register2);
2954 dbg("NEED 64 %s bar=0x%x:%x(length=0x%x)\n", res_type_str, temp_register2, temp_register, base);
2955
2956 if (prefetchable && resources->p_mem_head)
2957 mem_node = get_resource(&(resources->p_mem_head), (ulong)base);
2958 else {
2959 if (prefetchable)
2960 dbg("using MEM for PMEM\n");
2961 mem_node = get_resource(&(resources->mem_head), (ulong)base);
2962 }
2963
2964 /* Allocate the resource to the board */
2965 if (mem_node) {
2966 base64 = mem_node->base;
2967 mem_node->next = *res_node;
2968 *res_node = mem_node;
2969 dbg("Got 64 %s base=0x%x:%x(length=%x)\n", res_type_str, (u32)(base64 >> 32), (u32)base64, mem_node->length);
2970 } else {
2971 err("Got NO 64 %s resource(length=0x%x)\n", res_type_str, base);
2972 return -ENOMEM;
2973 }
2974 break;
2975 default:
2976 dbg("reserved BAR type=0x%x\n", temp_register);
2977 break;
2978 }
2979
2980 }
2981
2982 if (base64) {
2983 rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, (u32)base64);
2984 cloop += 4;
2985 base64 >>= 32;
2986
2987 if (base64) {
2988 dbg("%s: high dword of base64(0x%x) set to 0\n", __FUNCTION__, (u32)base64);
2989 base64 = 0x0L;
2990 }
2991
2992 rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, (u32)base64);
2993 } else {
2994 rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, base);
2995 }
2996 } /* End of base register loop */
2997
2998 #if defined(CONFIG_X86_64)
2999 /* Figure out which interrupt pin this function uses */
3000 rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_INTERRUPT_PIN, &temp_byte);
3001
3002 /* If this function needs an interrupt and we are behind a bridge
3003 and the pin is tied to something that's alread mapped,
3004 set this one the same
3005 */
3006 if (temp_byte && resources->irqs &&
3007 (resources->irqs->valid_INT &
3008 (0x01 << ((temp_byte + resources->irqs->barber_pole - 1) & 0x03)))) {
3009 /* We have to share with something already set up */
3010 IRQ = resources->irqs->interrupt[(temp_byte + resources->irqs->barber_pole - 1) & 0x03];
3011 } else {
3012 /* Program IRQ based on card type */
3013 rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code);
3014
3015 if (class_code == PCI_BASE_CLASS_STORAGE) {
3016 IRQ = shpchp_disk_irq;
3017 } else {
3018 IRQ = shpchp_nic_irq;
3019 }
3020 }
3021
3022 /* IRQ Line */
3023 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_INTERRUPT_LINE, IRQ);
3024
3025 if (!behind_bridge) {
3026 rc = shpchp_set_irq(func->bus, func->device, temp_byte + 0x09, IRQ);
3027 if (rc)
3028 return(1);
3029 } else {
3030 /* TBD - this code may also belong in the other clause of this If statement */
3031 resources->irqs->interrupt[(temp_byte + resources->irqs->barber_pole - 1) & 0x03] = IRQ;
3032 resources->irqs->valid_INT |= 0x01 << (temp_byte + resources->irqs->barber_pole - 1) & 0x03;
3033 }
3034 #endif
3035 /* Disable ROM base Address */
3036 temp_word = 0x00L;
3037 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_ROM_ADDRESS, temp_word);
3038
3039 /* Set HP parameters (Cache Line Size, Latency Timer) */
3040 rc = shpchprm_set_hpp(ctrl, func, PCI_HEADER_TYPE_NORMAL);
3041 if (rc)
3042 return rc;
3043
3044 shpchprm_enable_card(ctrl, func, PCI_HEADER_TYPE_NORMAL);
3045
3046 dbg("PCI function Hot-Added s:b:d:f(%02x:%02x:%02x:%02x)\n", ctrl->seg, func->bus, func->device, func->function);
3047 } /* End of Not-A-Bridge else */
3048 else {
3049 /* It's some strange type of PCI adapter (Cardbus?) */
3050 return(DEVICE_TYPE_NOT_SUPPORTED);
3051 }
3052
3053 func->configured = 1;
3054
3055 return 0;
3056 }
3057
3058