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authorrajesh.shah@intel.com <rajesh.shah@intel.com>2005-10-13 15:05:36 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2005-10-28 18:36:59 -0400
commitdbd7a78818d125a0ebd5507d4edb4dd5900006ab (patch)
tree682a1681aad47f70bfb760fca077f54589be92c6 /drivers/pci/hotplug/shpchp_ctrl.c
parente3b1bd572f1cdb247bb4266a593b6894dc578d6a (diff)
[PATCH] shpchp: use the PCI core for hotplug resource management
This patch converts the standard hotplug controller driver to use the PCI core for resource management. This eliminates a whole lot of duplicated code, and integrates shpchp in the system's normal PCI handling code. Signed-off-by: Rajesh Shah <rajesh.shah@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/pci/hotplug/shpchp_ctrl.c')
-rw-r--r--drivers/pci/hotplug/shpchp_ctrl.c1624
1 files changed, 42 insertions, 1582 deletions
diff --git a/drivers/pci/hotplug/shpchp_ctrl.c b/drivers/pci/hotplug/shpchp_ctrl.c
index 91c9903e621f..aa507e453e49 100644
--- a/drivers/pci/hotplug/shpchp_ctrl.c
+++ b/drivers/pci/hotplug/shpchp_ctrl.c
@@ -38,13 +38,10 @@
38#include <linux/wait.h> 38#include <linux/wait.h>
39#include <linux/smp_lock.h> 39#include <linux/smp_lock.h>
40#include <linux/pci.h> 40#include <linux/pci.h>
41#include "../pci.h"
41#include "shpchp.h" 42#include "shpchp.h"
42#include "shpchprm.h" 43#include "shpchprm.h"
43 44
44static 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);
46static 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);
48static void interrupt_event_handler(struct controller *ctrl); 45static void interrupt_event_handler(struct controller *ctrl);
49 46
50static struct semaphore event_semaphore; /* mutex for process loop (up if something to process) */ 47static struct semaphore event_semaphore; /* mutex for process loop (up if something to process) */
@@ -52,9 +49,6 @@ static struct semaphore event_exit; /* guard ensure thread has exited before ca
52static int event_finished; 49static int event_finished;
53static unsigned long pushbutton_pending; /* = 0 */ 50static unsigned long pushbutton_pending; /* = 0 */
54 51
55u8 shpchp_disk_irq;
56u8 shpchp_nic_irq;
57
58u8 shpchp_handle_attention_button(u8 hp_slot, void *inst_id) 52u8 shpchp_handle_attention_button(u8 hp_slot, void *inst_id)
59{ 53{
60 struct controller *ctrl = (struct controller *) inst_id; 54 struct controller *ctrl = (struct controller *) inst_id;
@@ -260,624 +254,6 @@ u8 shpchp_handle_power_fault(u8 hp_slot, void *inst_id)
260 return rc; 254 return rc;
261} 255}
262 256
263
264/*
265 * sort_by_size
266 *
267 * Sorts nodes on the list by their length.
268 * Smallest first.
269 *
270 */
271static int sort_by_size(struct pci_resource **head)
272{
273 struct pci_resource *current_res;
274 struct pci_resource *next_res;
275 int out_of_order = 1;
276
277 if (!(*head))
278 return(1);
279
280 if (!((*head)->next))
281 return(0);
282
283 while (out_of_order) {
284 out_of_order = 0;
285
286 /* Special case for swapping list head */
287 if (((*head)->next) &&
288 ((*head)->length > (*head)->next->length)) {
289 out_of_order++;
290 current_res = *head;
291 *head = (*head)->next;
292 current_res->next = (*head)->next;
293 (*head)->next = current_res;
294 }
295
296 current_res = *head;
297
298 while (current_res->next && current_res->next->next) {
299 if (current_res->next->length > current_res->next->next->length) {
300 out_of_order++;
301 next_res = current_res->next;
302 current_res->next = current_res->next->next;
303 current_res = current_res->next;
304 next_res->next = current_res->next;
305 current_res->next = next_res;
306 } else
307 current_res = current_res->next;
308 }
309 } /* End of out_of_order loop */
310
311 return(0);
312}
313
314
315/*
316 * sort_by_max_size
317 *
318 * Sorts nodes on the list by their length.
319 * Largest first.
320 *
321 */
322static int sort_by_max_size(struct pci_resource **head)
323{
324 struct pci_resource *current_res;
325 struct pci_resource *next_res;
326 int out_of_order = 1;
327
328 if (!(*head))
329 return(1);
330
331 if (!((*head)->next))
332 return(0);
333
334 while (out_of_order) {
335 out_of_order = 0;
336
337 /* Special case for swapping list head */
338 if (((*head)->next) &&
339 ((*head)->length < (*head)->next->length)) {
340 out_of_order++;
341 current_res = *head;
342 *head = (*head)->next;
343 current_res->next = (*head)->next;
344 (*head)->next = current_res;
345 }
346
347 current_res = *head;
348
349 while (current_res->next && current_res->next->next) {
350 if (current_res->next->length < current_res->next->next->length) {
351 out_of_order++;
352 next_res = current_res->next;
353 current_res->next = current_res->next->next;
354 current_res = current_res->next;
355 next_res->next = current_res->next;
356 current_res->next = next_res;
357 } else
358 current_res = current_res->next;
359 }
360 } /* End of out_of_order loop */
361
362 return(0);
363}
364
365
366/*
367 * do_pre_bridge_resource_split
368 *
369 * Returns zero or one node of resources that aren't in use
370 *
371 */
372static struct pci_resource *do_pre_bridge_resource_split (struct pci_resource **head, struct pci_resource **orig_head, u32 alignment)
373{
374 struct pci_resource *prevnode = NULL;
375 struct pci_resource *node;
376 struct pci_resource *split_node;
377 u32 rc;
378 u32 temp_dword;
379 dbg("do_pre_bridge_resource_split\n");
380
381 if (!(*head) || !(*orig_head))
382 return(NULL);
383
384 rc = shpchp_resource_sort_and_combine(head);
385
386 if (rc)
387 return(NULL);
388
389 if ((*head)->base != (*orig_head)->base)
390 return(NULL);
391
392 if ((*head)->length == (*orig_head)->length)
393 return(NULL);
394
395
396 /* If we got here, there the bridge requires some of the resource, but
397 * we may be able to split some off of the front
398 */
399 node = *head;
400
401 if (node->length & (alignment -1)) {
402 /* This one isn't an aligned length, so we'll make a new entry
403 * and split it up.
404 */
405 split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
406
407 if (!split_node)
408 return(NULL);
409
410 temp_dword = (node->length | (alignment-1)) + 1 - alignment;
411
412 split_node->base = node->base;
413 split_node->length = temp_dword;
414
415 node->length -= temp_dword;
416 node->base += split_node->length;
417
418 /* Put it in the list */
419 *head = split_node;
420 split_node->next = node;
421 }
422
423 if (node->length < alignment) {
424 return(NULL);
425 }
426
427 /* Now unlink it */
428 if (*head == node) {
429 *head = node->next;
430 node->next = NULL;
431 } else {
432 prevnode = *head;
433 while (prevnode->next != node)
434 prevnode = prevnode->next;
435
436 prevnode->next = node->next;
437 node->next = NULL;
438 }
439
440 return(node);
441}
442
443
444/*
445 * do_bridge_resource_split
446 *
447 * Returns zero or one node of resources that aren't in use
448 *
449 */
450static struct pci_resource *do_bridge_resource_split (struct pci_resource **head, u32 alignment)
451{
452 struct pci_resource *prevnode = NULL;
453 struct pci_resource *node;
454 u32 rc;
455 u32 temp_dword;
456
457 if (!(*head))
458 return(NULL);
459
460 rc = shpchp_resource_sort_and_combine(head);
461
462 if (rc)
463 return(NULL);
464
465 node = *head;
466
467 while (node->next) {
468 prevnode = node;
469 node = node->next;
470 kfree(prevnode);
471 }
472
473 if (node->length < alignment) {
474 kfree(node);
475 return(NULL);
476 }
477
478 if (node->base & (alignment - 1)) {
479 /* Short circuit if adjusted size is too small */
480 temp_dword = (node->base | (alignment-1)) + 1;
481 if ((node->length - (temp_dword - node->base)) < alignment) {
482 kfree(node);
483 return(NULL);
484 }
485
486 node->length -= (temp_dword - node->base);
487 node->base = temp_dword;
488 }
489
490 if (node->length & (alignment - 1)) {
491 /* There's stuff in use after this node */
492 kfree(node);
493 return(NULL);
494 }
495
496 return(node);
497}
498
499
500/*
501 * get_io_resource
502 *
503 * this function sorts the resource list by size and then
504 * returns the first node of "size" length that is not in the
505 * ISA aliasing window. If it finds a node larger than "size"
506 * it will split it up.
507 *
508 * size must be a power of two.
509 */
510static struct pci_resource *get_io_resource (struct pci_resource **head, u32 size)
511{
512 struct pci_resource *prevnode;
513 struct pci_resource *node;
514 struct pci_resource *split_node = NULL;
515 u32 temp_dword;
516
517 if (!(*head))
518 return(NULL);
519
520 if ( shpchp_resource_sort_and_combine(head) )
521 return(NULL);
522
523 if ( sort_by_size(head) )
524 return(NULL);
525
526 for (node = *head; node; node = node->next) {
527 if (node->length < size)
528 continue;
529
530 if (node->base & (size - 1)) {
531 /* This one isn't base aligned properly
532 so we'll make a new entry and split it up */
533 temp_dword = (node->base | (size-1)) + 1;
534
535 /*/ Short circuit if adjusted size is too small */
536 if ((node->length - (temp_dword - node->base)) < size)
537 continue;
538
539 split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
540
541 if (!split_node)
542 return(NULL);
543
544 split_node->base = node->base;
545 split_node->length = temp_dword - node->base;
546 node->base = temp_dword;
547 node->length -= split_node->length;
548
549 /* Put it in the list */
550 split_node->next = node->next;
551 node->next = split_node;
552 } /* End of non-aligned base */
553
554 /* Don't need to check if too small since we already did */
555 if (node->length > size) {
556 /* This one is longer than we need
557 so we'll make a new entry and split it up */
558 split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
559
560 if (!split_node)
561 return(NULL);
562
563 split_node->base = node->base + size;
564 split_node->length = node->length - size;
565 node->length = size;
566
567 /* Put it in the list */
568 split_node->next = node->next;
569 node->next = split_node;
570 } /* End of too big on top end */
571
572 /* For IO make sure it's not in the ISA aliasing space */
573 if (node->base & 0x300L)
574 continue;
575
576 /* If we got here, then it is the right size
577 Now take it out of the list */
578 if (*head == node) {
579 *head = node->next;
580 } else {
581 prevnode = *head;
582 while (prevnode->next != node)
583 prevnode = prevnode->next;
584
585 prevnode->next = node->next;
586 }
587 node->next = NULL;
588 /* Stop looping */
589 break;
590 }
591
592 return(node);
593}
594
595
596/*
597 * get_max_resource
598 *
599 * Gets the largest node that is at least "size" big from the
600 * list pointed to by head. It aligns the node on top and bottom
601 * to "size" alignment before returning it.
602 * J.I. modified to put max size limits of; 64M->32M->16M->8M->4M->1M
603 * This is needed to avoid allocating entire ACPI _CRS res to one child bridge/slot.
604 */
605static struct pci_resource *get_max_resource (struct pci_resource **head, u32 size)
606{
607 struct pci_resource *max;
608 struct pci_resource *temp;
609 struct pci_resource *split_node;
610 u32 temp_dword;
611 u32 max_size[] = { 0x4000000, 0x2000000, 0x1000000, 0x0800000, 0x0400000, 0x0200000, 0x0100000, 0x00 };
612 int i;
613
614 if (!(*head))
615 return(NULL);
616
617 if (shpchp_resource_sort_and_combine(head))
618 return(NULL);
619
620 if (sort_by_max_size(head))
621 return(NULL);
622
623 for (max = *head;max; max = max->next) {
624
625 /* If not big enough we could probably just bail,
626 instead we'll continue to the next. */
627 if (max->length < size)
628 continue;
629
630 if (max->base & (size - 1)) {
631 /* This one isn't base aligned properly
632 so we'll make a new entry and split it up */
633 temp_dword = (max->base | (size-1)) + 1;
634
635 /* Short circuit if adjusted size is too small */
636 if ((max->length - (temp_dword - max->base)) < size)
637 continue;
638
639 split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
640
641 if (!split_node)
642 return(NULL);
643
644 split_node->base = max->base;
645 split_node->length = temp_dword - max->base;
646 max->base = temp_dword;
647 max->length -= split_node->length;
648
649 /* Put it next in the list */
650 split_node->next = max->next;
651 max->next = split_node;
652 }
653
654 if ((max->base + max->length) & (size - 1)) {
655 /* This one isn't end aligned properly at the top
656 so we'll make a new entry and split it up */
657 split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
658
659 if (!split_node)
660 return(NULL);
661 temp_dword = ((max->base + max->length) & ~(size - 1));
662 split_node->base = temp_dword;
663 split_node->length = max->length + max->base
664 - split_node->base;
665 max->length -= split_node->length;
666
667 /* Put it in the list */
668 split_node->next = max->next;
669 max->next = split_node;
670 }
671
672 /* Make sure it didn't shrink too much when we aligned it */
673 if (max->length < size)
674 continue;
675
676 for ( i = 0; max_size[i] > size; i++) {
677 if (max->length > max_size[i]) {
678 split_node = kmalloc(sizeof(*split_node),
679 GFP_KERNEL);
680 if (!split_node)
681 break; /* return (NULL); */
682 split_node->base = max->base + max_size[i];
683 split_node->length = max->length - max_size[i];
684 max->length = max_size[i];
685 /* Put it next in the list */
686 split_node->next = max->next;
687 max->next = split_node;
688 break;
689 }
690 }
691
692 /* Now take it out of the list */
693 temp = (struct pci_resource*) *head;
694 if (temp == max) {
695 *head = max->next;
696 } else {
697 while (temp && temp->next != max) {
698 temp = temp->next;
699 }
700
701 temp->next = max->next;
702 }
703
704 max->next = NULL;
705 return(max);
706 }
707
708 /* If we get here, we couldn't find one */
709 return(NULL);
710}
711
712
713/*
714 * get_resource
715 *
716 * this function sorts the resource list by size and then
717 * returns the first node of "size" length. If it finds a node
718 * larger than "size" it will split it up.
719 *
720 * size must be a power of two.
721 */
722static struct pci_resource *get_resource (struct pci_resource **head, u32 size)
723{
724 struct pci_resource *prevnode;
725 struct pci_resource *node;
726 struct pci_resource *split_node;
727 u32 temp_dword;
728
729 if (!(*head))
730 return(NULL);
731
732 if ( shpchp_resource_sort_and_combine(head) )
733 return(NULL);
734
735 if ( sort_by_size(head) )
736 return(NULL);
737
738 for (node = *head; node; node = node->next) {
739 dbg("%s: req_size =0x%x node=%p, base=0x%x, length=0x%x\n",
740 __FUNCTION__, size, node, node->base, node->length);
741 if (node->length < size)
742 continue;
743
744 if (node->base & (size - 1)) {
745 dbg("%s: not aligned\n", __FUNCTION__);
746 /* this one isn't base aligned properly
747 so we'll make a new entry and split it up */
748 temp_dword = (node->base | (size-1)) + 1;
749
750 /* Short circuit if adjusted size is too small */
751 if ((node->length - (temp_dword - node->base)) < size)
752 continue;
753
754 split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
755
756 if (!split_node)
757 return(NULL);
758
759 split_node->base = node->base;
760 split_node->length = temp_dword - node->base;
761 node->base = temp_dword;
762 node->length -= split_node->length;
763
764 /* Put it in the list */
765 split_node->next = node->next;
766 node->next = split_node;
767 } /* End of non-aligned base */
768
769 /* Don't need to check if too small since we already did */
770 if (node->length > size) {
771 dbg("%s: too big\n", __FUNCTION__);
772 /* this one is longer than we need
773 so we'll make a new entry and split it up */
774 split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
775
776 if (!split_node)
777 return(NULL);
778
779 split_node->base = node->base + size;
780 split_node->length = node->length - size;
781 node->length = size;
782
783 /* Put it in the list */
784 split_node->next = node->next;
785 node->next = split_node;
786 } /* End of too big on top end */
787
788 dbg("%s: got one!!!\n", __FUNCTION__);
789 /* If we got here, then it is the right size
790 Now take it out of the list */
791 if (*head == node) {
792 *head = node->next;
793 } else {
794 prevnode = *head;
795 while (prevnode->next != node)
796 prevnode = prevnode->next;
797
798 prevnode->next = node->next;
799 }
800 node->next = NULL;
801 /* Stop looping */
802 break;
803 }
804 return(node);
805}
806
807
808/*
809 * shpchp_resource_sort_and_combine
810 *
811 * Sorts all of the nodes in the list in ascending order by
812 * their base addresses. Also does garbage collection by
813 * combining adjacent nodes.
814 *
815 * returns 0 if success
816 */
817int shpchp_resource_sort_and_combine(struct pci_resource **head)
818{
819 struct pci_resource *node1;
820 struct pci_resource *node2;
821 int out_of_order = 1;
822
823 dbg("%s: head = %p, *head = %p\n", __FUNCTION__, head, *head);
824
825 if (!(*head))
826 return(1);
827
828 dbg("*head->next = %p\n",(*head)->next);
829
830 if (!(*head)->next)
831 return(0); /* only one item on the list, already sorted! */
832
833 dbg("*head->base = 0x%x\n",(*head)->base);
834 dbg("*head->next->base = 0x%x\n",(*head)->next->base);
835 while (out_of_order) {
836 out_of_order = 0;
837
838 /* Special case for swapping list head */
839 if (((*head)->next) &&
840 ((*head)->base > (*head)->next->base)) {
841 node1 = *head;
842 (*head) = (*head)->next;
843 node1->next = (*head)->next;
844 (*head)->next = node1;
845 out_of_order++;
846 }
847
848 node1 = (*head);
849
850 while (node1->next && node1->next->next) {
851 if (node1->next->base > node1->next->next->base) {
852 out_of_order++;
853 node2 = node1->next;
854 node1->next = node1->next->next;
855 node1 = node1->next;
856 node2->next = node1->next;
857 node1->next = node2;
858 } else
859 node1 = node1->next;
860 }
861 } /* End of out_of_order loop */
862
863 node1 = *head;
864
865 while (node1 && node1->next) {
866 if ((node1->base + node1->length) == node1->next->base) {
867 /* Combine */
868 dbg("8..\n");
869 node1->length += node1->next->length;
870 node2 = node1->next;
871 node1->next = node1->next->next;
872 kfree(node2);
873 } else
874 node1 = node1->next;
875 }
876
877 return(0);
878}
879
880
881/** 257/**
882 * shpchp_slot_create - Creates a node and adds it to the proper bus. 258 * shpchp_slot_create - Creates a node and adds it to the proper bus.
883 * @busnumber - bus where new node is to be located 259 * @busnumber - bus where new node is to be located
@@ -933,7 +309,6 @@ static int slot_remove(struct pci_func * old_slot)
933 309
934 if (next == old_slot) { 310 if (next == old_slot) {
935 shpchp_slot_list[old_slot->bus] = old_slot->next; 311 shpchp_slot_list[old_slot->bus] = old_slot->next;
936 shpchp_destroy_board_resources(old_slot);
937 kfree(old_slot); 312 kfree(old_slot);
938 return(0); 313 return(0);
939 } 314 }
@@ -944,7 +319,6 @@ static int slot_remove(struct pci_func * old_slot)
944 319
945 if (next->next == old_slot) { 320 if (next->next == old_slot) {
946 next->next = old_slot->next; 321 next->next = old_slot->next;
947 shpchp_destroy_board_resources(old_slot);
948 kfree(old_slot); 322 kfree(old_slot);
949 return(0); 323 return(0);
950 } else 324 } else
@@ -1120,12 +494,8 @@ static u32 board_added(struct pci_func * func, struct controller * ctrl)
1120{ 494{
1121 u8 hp_slot; 495 u8 hp_slot;
1122 u8 slots_not_empty = 0; 496 u8 slots_not_empty = 0;
1123 int index; 497 u32 rc = 0;
1124 u32 temp_register = 0xFFFFFFFF;
1125 u32 retval, rc = 0;
1126 struct pci_func *new_func = NULL;
1127 struct slot *p_slot; 498 struct slot *p_slot;
1128 struct resource_lists res_lists;
1129 enum pci_bus_speed adapter_speed, bus_speed, max_bus_speed; 499 enum pci_bus_speed adapter_speed, bus_speed, max_bus_speed;
1130 u8 pi, mode; 500 u8 pi, mode;
1131 501
@@ -1328,135 +698,65 @@ static u32 board_added(struct pci_func * func, struct controller * ctrl)
1328 /* Check for a power fault */ 698 /* Check for a power fault */
1329 if (func->status == 0xFF) { 699 if (func->status == 0xFF) {
1330 /* power fault occurred, but it was benign */ 700 /* power fault occurred, but it was benign */
1331 temp_register = 0xFFFFFFFF; 701 dbg("%s: power fault\n", __FUNCTION__);
1332 dbg("%s: temp register set to %x by power fault\n", __FUNCTION__, temp_register);
1333 rc = POWER_FAILURE; 702 rc = POWER_FAILURE;
1334 func->status = 0; 703 func->status = 0;
1335 } else { 704 goto err_exit;
1336 /* Get vendor/device ID u32 */
1337 rc = pci_bus_read_config_dword (ctrl->pci_dev->subordinate, PCI_DEVFN(func->device, func->function),
1338 PCI_VENDOR_ID, &temp_register);
1339 dbg("%s: pci_bus_read_config_dword returns %d\n", __FUNCTION__, rc);
1340 dbg("%s: temp_register is %x\n", __FUNCTION__, temp_register);
1341
1342 if (rc != 0) {
1343 /* Something's wrong here */
1344 temp_register = 0xFFFFFFFF;
1345 dbg("%s: temp register set to %x by error\n", __FUNCTION__, temp_register);
1346 }
1347 /* Preset return code. It will be changed later if things go okay. */
1348 rc = NO_ADAPTER_PRESENT;
1349 } 705 }
1350 706
1351 /* All F's is an empty slot or an invalid board */ 707 if (shpchp_configure_device(p_slot)) {
1352 if (temp_register != 0xFFFFFFFF) { /* Check for a board in the slot */ 708 err("Cannot add device at 0x%x:0x%x\n", p_slot->bus,
1353 res_lists.io_head = ctrl->io_head; 709 p_slot->device);
1354 res_lists.mem_head = ctrl->mem_head; 710 goto err_exit;
1355 res_lists.p_mem_head = ctrl->p_mem_head; 711 }
1356 res_lists.bus_head = ctrl->bus_head;
1357 res_lists.irqs = NULL;
1358
1359 rc = configure_new_device(ctrl, func, 0, &res_lists, 0, 0);
1360 dbg("%s: back from configure_new_device\n", __FUNCTION__);
1361
1362 ctrl->io_head = res_lists.io_head;
1363 ctrl->mem_head = res_lists.mem_head;
1364 ctrl->p_mem_head = res_lists.p_mem_head;
1365 ctrl->bus_head = res_lists.bus_head;
1366
1367 shpchp_resource_sort_and_combine(&(ctrl->mem_head));
1368 shpchp_resource_sort_and_combine(&(ctrl->p_mem_head));
1369 shpchp_resource_sort_and_combine(&(ctrl->io_head));
1370 shpchp_resource_sort_and_combine(&(ctrl->bus_head));
1371
1372 if (rc) {
1373 /* Wait for exclusive access to hardware */
1374 down(&ctrl->crit_sect);
1375
1376 /* turn off slot, turn on Amber LED, turn off Green LED */
1377 retval = p_slot->hpc_ops->slot_disable(p_slot);
1378 if (retval) {
1379 err("%s: Issue of Slot Enable command failed\n", __FUNCTION__);
1380 /* Done with exclusive hardware access */
1381 up(&ctrl->crit_sect);
1382 return retval;
1383 }
1384 /* Wait for the command to complete */
1385 wait_for_ctrl_irq (ctrl);
1386
1387 retval = p_slot->hpc_ops->check_cmd_status(ctrl);
1388 if (retval) {
1389 err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__, retval);
1390 /* Done with exclusive hardware access */
1391 up(&ctrl->crit_sect);
1392 return retval;
1393 }
1394 712
1395 /* Done with exclusive hardware access */ 713 shpchp_save_slot_config(ctrl, func);
1396 up(&ctrl->crit_sect);
1397 714
1398 return(rc); 715 func->status = 0;
1399 } 716 func->switch_save = 0x10;
1400 shpchp_save_slot_config(ctrl, func); 717 func->is_a_board = 0x01;
718 func->pwr_save = 1;
1401 719
1402 func->status = 0; 720 /* Wait for exclusive access to hardware */
1403 func->switch_save = 0x10; 721 down(&ctrl->crit_sect);
1404 func->is_a_board = 0x01;
1405 func->pwr_save = 1;
1406 722
1407 /* Next, we will instantiate the linux pci_dev structures 723 p_slot->hpc_ops->green_led_on(p_slot);
1408 * (with appropriate driver notification, if already present)
1409 */
1410 index = 0;
1411 do {
1412 new_func = shpchp_slot_find(ctrl->slot_bus, func->device, index++);
1413 if (new_func && !new_func->pci_dev) {
1414 dbg("%s:call pci_hp_configure_dev\n", __FUNCTION__);
1415 shpchp_configure_device(ctrl, new_func);
1416 }
1417 } while (new_func);
1418 724
1419 /* Wait for exclusive access to hardware */ 725 /* Wait for the command to complete */
1420 down(&ctrl->crit_sect); 726 wait_for_ctrl_irq (ctrl);
1421 727
1422 p_slot->hpc_ops->green_led_on(p_slot); 728 /* Done with exclusive hardware access */
729 up(&ctrl->crit_sect);
1423 730
1424 /* Wait for the command to complete */ 731 return 0;
1425 wait_for_ctrl_irq (ctrl);
1426 732
733err_exit:
734 /* Wait for exclusive access to hardware */
735 down(&ctrl->crit_sect);
1427 736
737 /* turn off slot, turn on Amber LED, turn off Green LED */
738 rc = p_slot->hpc_ops->slot_disable(p_slot);
739 if (rc) {
740 err("%s: Issue of Slot Disable command failed\n", __FUNCTION__);
1428 /* Done with exclusive hardware access */ 741 /* Done with exclusive hardware access */
1429 up(&ctrl->crit_sect); 742 up(&ctrl->crit_sect);
743 return rc;
744 }
745 /* Wait for the command to complete */
746 wait_for_ctrl_irq (ctrl);
1430 747
1431 } else { 748 rc = p_slot->hpc_ops->check_cmd_status(ctrl);
1432 /* Wait for exclusive access to hardware */ 749 if (rc) {
1433 down(&ctrl->crit_sect); 750 err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__, rc);
1434
1435 /* turn off slot, turn on Amber LED, turn off Green LED */
1436 rc = p_slot->hpc_ops->slot_disable(p_slot);
1437 if (rc) {
1438 err("%s: Issue of Slot Disable command failed\n", __FUNCTION__);
1439 /* Done with exclusive hardware access */
1440 up(&ctrl->crit_sect);
1441 return rc;
1442 }
1443 /* Wait for the command to complete */
1444 wait_for_ctrl_irq (ctrl);
1445
1446 rc = p_slot->hpc_ops->check_cmd_status(ctrl);
1447 if (rc) {
1448 err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__, rc);
1449 /* Done with exclusive hardware access */
1450 up(&ctrl->crit_sect);
1451 return rc;
1452 }
1453
1454 /* Done with exclusive hardware access */ 751 /* Done with exclusive hardware access */
1455 up(&ctrl->crit_sect); 752 up(&ctrl->crit_sect);
1456 753 return rc;
1457 return(rc);
1458 } 754 }
1459 return 0; 755
756 /* Done with exclusive hardware access */
757 up(&ctrl->crit_sect);
758
759 return(rc);
1460} 760}
1461 761
1462 762
@@ -1466,13 +766,9 @@ static u32 board_added(struct pci_func * func, struct controller * ctrl)
1466 */ 766 */
1467static u32 remove_board(struct pci_func *func, struct controller *ctrl) 767static u32 remove_board(struct pci_func *func, struct controller *ctrl)
1468{ 768{
1469 int index;
1470 u8 skip = 0;
1471 u8 device; 769 u8 device;
1472 u8 hp_slot; 770 u8 hp_slot;
1473 u32 rc; 771 u32 rc;
1474 struct resource_lists res_lists;
1475 struct pci_func *temp_func;
1476 struct slot *p_slot; 772 struct slot *p_slot;
1477 773
1478 if (func == NULL) 774 if (func == NULL)
@@ -1488,27 +784,6 @@ static u32 remove_board(struct pci_func *func, struct controller *ctrl)
1488 784
1489 dbg("In %s, hp_slot = %d\n", __FUNCTION__, hp_slot); 785 dbg("In %s, hp_slot = %d\n", __FUNCTION__, hp_slot);
1490 786
1491 if ((ctrl->add_support) &&
1492 !(func->bus_head || func->mem_head || func->p_mem_head || func->io_head)) {
1493 /* Here we check to see if we've saved any of the board's
1494 * resources already. If so, we'll skip the attempt to
1495 * determine what's being used.
1496 */
1497 index = 0;
1498
1499 temp_func = func;
1500
1501 while ((temp_func = shpchp_slot_find(temp_func->bus, temp_func->device, index++))) {
1502 if (temp_func->bus_head || temp_func->mem_head
1503 || temp_func->p_mem_head || temp_func->io_head) {
1504 skip = 1;
1505 break;
1506 }
1507 }
1508
1509 if (!skip)
1510 rc = shpchp_save_used_resources(ctrl, func, DISABLE_CARD);
1511 }
1512 /* Change status to shutdown */ 787 /* Change status to shutdown */
1513 if (func->is_a_board) 788 if (func->is_a_board)
1514 func->status = 0x01; 789 func->status = 0x01;
@@ -1551,26 +826,6 @@ static u32 remove_board(struct pci_func *func, struct controller *ctrl)
1551 826
1552 if (ctrl->add_support) { 827 if (ctrl->add_support) {
1553 while (func) { 828 while (func) {
1554 res_lists.io_head = ctrl->io_head;
1555 res_lists.mem_head = ctrl->mem_head;
1556 res_lists.p_mem_head = ctrl->p_mem_head;
1557 res_lists.bus_head = ctrl->bus_head;
1558
1559 dbg("Returning resources to ctlr lists for (B/D/F) = (%#x/%#x/%#x)\n", func->bus,
1560 func->device, func->function);
1561
1562 shpchp_return_board_resources(func, &res_lists);
1563
1564 ctrl->io_head = res_lists.io_head;
1565 ctrl->mem_head = res_lists.mem_head;
1566 ctrl->p_mem_head = res_lists.p_mem_head;
1567 ctrl->bus_head = res_lists.bus_head;
1568
1569 shpchp_resource_sort_and_combine(&(ctrl->mem_head));
1570 shpchp_resource_sort_and_combine(&(ctrl->p_mem_head));
1571 shpchp_resource_sort_and_combine(&(ctrl->io_head));
1572 shpchp_resource_sort_and_combine(&(ctrl->bus_head));
1573
1574 if (is_bridge(func)) { 829 if (is_bridge(func)) {
1575 dbg("PCI Bridge Hot-Remove s:b:d:f(%02x:%02x:%02x:%02x)\n", ctrl->seg, func->bus, 830 dbg("PCI Bridge Hot-Remove s:b:d:f(%02x:%02x:%02x:%02x)\n", ctrl->seg, func->bus,
1576 func->device, func->function); 831 func->device, func->function);
@@ -2050,798 +1305,3 @@ int shpchp_disable_slot (struct slot *p_slot)
2050 return rc; 1305 return rc;
2051} 1306}
2052 1307
2053
2054/**
2055 * configure_new_device - Configures the PCI header information of one board.
2056 *
2057 * @ctrl: pointer to controller structure
2058 * @func: pointer to function structure
2059 * @behind_bridge: 1 if this is a recursive call, 0 if not
2060 * @resources: pointer to set of resource lists
2061 *
2062 * Returns 0 if success
2063 *
2064 */
2065static u32 configure_new_device (struct controller * ctrl, struct pci_func * func,
2066 u8 behind_bridge, struct resource_lists * resources, u8 bridge_bus, u8 bridge_dev)
2067{
2068 u8 temp_byte, function, max_functions, stop_it;
2069 int rc;
2070 u32 ID;
2071 struct pci_func *new_slot;
2072 struct pci_bus lpci_bus, *pci_bus;
2073 int index;
2074
2075 new_slot = func;
2076
2077 dbg("%s\n", __FUNCTION__);
2078 memcpy(&lpci_bus, ctrl->pci_dev->subordinate, sizeof(lpci_bus));
2079 pci_bus = &lpci_bus;
2080 pci_bus->number = func->bus;
2081
2082 /* Check for Multi-function device */
2083 rc = pci_bus_read_config_byte(pci_bus, PCI_DEVFN(func->device, func->function), 0x0E, &temp_byte);
2084 if (rc) {
2085 dbg("%s: rc = %d\n", __FUNCTION__, rc);
2086 return rc;
2087 }
2088
2089 if (temp_byte & 0x80) /* Multi-function device */
2090 max_functions = 8;
2091 else
2092 max_functions = 1;
2093
2094 function = 0;
2095
2096 do {
2097 rc = configure_new_function(ctrl, new_slot, behind_bridge, resources, bridge_bus, bridge_dev);
2098
2099 if (rc) {
2100 dbg("configure_new_function failed %d\n",rc);
2101 index = 0;
2102
2103 while (new_slot) {
2104 new_slot = shpchp_slot_find(new_slot->bus, new_slot->device, index++);
2105
2106 if (new_slot)
2107 shpchp_return_board_resources(new_slot, resources);
2108 }
2109
2110 return(rc);
2111 }
2112
2113 function++;
2114
2115 stop_it = 0;
2116
2117 /* The following loop skips to the next present function
2118 * and creates a board structure
2119 */
2120
2121 while ((function < max_functions) && (!stop_it)) {
2122 pci_bus_read_config_dword(pci_bus, PCI_DEVFN(func->device, function), 0x00, &ID);
2123
2124 if (ID == 0xFFFFFFFF) { /* There's nothing there. */
2125 function++;
2126 } else { /* There's something there */
2127 /* Setup slot structure. */
2128 new_slot = shpchp_slot_create(func->bus);
2129
2130 if (new_slot == NULL) {
2131 /* Out of memory */
2132 return(1);
2133 }
2134
2135 new_slot->bus = func->bus;
2136 new_slot->device = func->device;
2137 new_slot->function = function;
2138 new_slot->is_a_board = 1;
2139 new_slot->status = 0;
2140
2141 stop_it++;
2142 }
2143 }
2144
2145 } while (function < max_functions);
2146 dbg("returning from configure_new_device\n");
2147
2148 return 0;
2149}
2150
2151
2152/*
2153 * Configuration logic that involves the hotplug data structures and
2154 * their bookkeeping
2155 */
2156
2157
2158/**
2159 * configure_new_function - Configures the PCI header information of one device
2160 *
2161 * @ctrl: pointer to controller structure
2162 * @func: pointer to function structure
2163 * @behind_bridge: 1 if this is a recursive call, 0 if not
2164 * @resources: pointer to set of resource lists
2165 *
2166 * Calls itself recursively for bridged devices.
2167 * Returns 0 if success
2168 *
2169 */
2170static int configure_new_function (struct controller * ctrl, struct pci_func * func,
2171 u8 behind_bridge, struct resource_lists *resources, u8 bridge_bus, u8 bridge_dev)
2172{
2173 int cloop;
2174 u8 temp_byte;
2175 u8 device;
2176 u8 class_code;
2177 u16 temp_word;
2178 u32 rc;
2179 u32 temp_register;
2180 u32 base;
2181 u32 ID;
2182 unsigned int devfn;
2183 struct pci_resource *mem_node;
2184 struct pci_resource *p_mem_node;
2185 struct pci_resource *io_node;
2186 struct pci_resource *bus_node;
2187 struct pci_resource *hold_mem_node;
2188 struct pci_resource *hold_p_mem_node;
2189 struct pci_resource *hold_IO_node;
2190 struct pci_resource *hold_bus_node;
2191 struct irq_mapping irqs;
2192 struct pci_func *new_slot;
2193 struct pci_bus lpci_bus, *pci_bus;
2194 struct resource_lists temp_resources;
2195#if defined(CONFIG_X86_64)
2196 u8 IRQ=0;
2197#endif
2198
2199 memcpy(&lpci_bus, ctrl->pci_dev->subordinate, sizeof(lpci_bus));
2200 pci_bus = &lpci_bus;
2201 pci_bus->number = func->bus;
2202 devfn = PCI_DEVFN(func->device, func->function);
2203
2204 /* Check for Bridge */
2205 rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &temp_byte);
2206 if (rc)
2207 return rc;
2208
2209 if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { /* PCI-PCI Bridge */
2210 /* set Primary bus */
2211 dbg("set Primary bus = 0x%x\n", func->bus);
2212 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_PRIMARY_BUS, func->bus);
2213 if (rc)
2214 return rc;
2215
2216 /* find range of busses to use */
2217 bus_node = get_max_resource(&resources->bus_head, 1L);
2218
2219 /* If we don't have any busses to allocate, we can't continue */
2220 if (!bus_node) {
2221 err("Got NO bus resource to use\n");
2222 return -ENOMEM;
2223 }
2224 dbg("Got ranges of buses to use: base:len=0x%x:%x\n", bus_node->base, bus_node->length);
2225
2226 /* set Secondary bus */
2227 temp_byte = (u8)bus_node->base;
2228 dbg("set Secondary bus = 0x%x\n", temp_byte);
2229 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SECONDARY_BUS, temp_byte);
2230 if (rc)
2231 return rc;
2232
2233 /* set subordinate bus */
2234 temp_byte = (u8)(bus_node->base + bus_node->length - 1);
2235 dbg("set subordinate bus = 0x%x\n", temp_byte);
2236 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte);
2237 if (rc)
2238 return rc;
2239
2240 /* Set HP parameters (Cache Line Size, Latency Timer) */
2241 rc = shpchprm_set_hpp(ctrl, func, PCI_HEADER_TYPE_BRIDGE);
2242 if (rc)
2243 return rc;
2244
2245 /* Setup the IO, memory, and prefetchable windows */
2246
2247 io_node = get_max_resource(&(resources->io_head), 0x1000L);
2248 if (io_node) {
2249 dbg("io_node(base, len, next) (%x, %x, %p)\n", io_node->base, io_node->length, io_node->next);
2250 }
2251
2252 mem_node = get_max_resource(&(resources->mem_head), 0x100000L);
2253 if (mem_node) {
2254 dbg("mem_node(base, len, next) (%x, %x, %p)\n", mem_node->base, mem_node->length, mem_node->next);
2255 }
2256
2257 if (resources->p_mem_head)
2258 p_mem_node = get_max_resource(&(resources->p_mem_head), 0x100000L);
2259 else {
2260 /*
2261 * In some platform implementation, MEM and PMEM are not
2262 * distinguished, and hence ACPI _CRS has only MEM entries
2263 * for both MEM and PMEM.
2264 */
2265 dbg("using MEM for PMEM\n");
2266 p_mem_node = get_max_resource(&(resources->mem_head), 0x100000L);
2267 }
2268 if (p_mem_node) {
2269 dbg("p_mem_node(base, len, next) (%x, %x, %p)\n", p_mem_node->base, p_mem_node->length, p_mem_node->next);
2270 }
2271
2272 /* set up the IRQ info */
2273 if (!resources->irqs) {
2274 irqs.barber_pole = 0;
2275 irqs.interrupt[0] = 0;
2276 irqs.interrupt[1] = 0;
2277 irqs.interrupt[2] = 0;
2278 irqs.interrupt[3] = 0;
2279 irqs.valid_INT = 0;
2280 } else {
2281 irqs.barber_pole = resources->irqs->barber_pole;
2282 irqs.interrupt[0] = resources->irqs->interrupt[0];
2283 irqs.interrupt[1] = resources->irqs->interrupt[1];
2284 irqs.interrupt[2] = resources->irqs->interrupt[2];
2285 irqs.interrupt[3] = resources->irqs->interrupt[3];
2286 irqs.valid_INT = resources->irqs->valid_INT;
2287 }
2288
2289 /* set up resource lists that are now aligned on top and bottom
2290 * for anything behind the bridge.
2291 */
2292 temp_resources.bus_head = bus_node;
2293 temp_resources.io_head = io_node;
2294 temp_resources.mem_head = mem_node;
2295 temp_resources.p_mem_head = p_mem_node;
2296 temp_resources.irqs = &irqs;
2297
2298 /* Make copies of the nodes we are going to pass down so that
2299 * if there is a problem,we can just use these to free resources
2300 */
2301 hold_bus_node = kmalloc(sizeof(*hold_bus_node), GFP_KERNEL);
2302 hold_IO_node = kmalloc(sizeof(*hold_IO_node), GFP_KERNEL);
2303 hold_mem_node = kmalloc(sizeof(*hold_mem_node), GFP_KERNEL);
2304 hold_p_mem_node = kmalloc(sizeof(*hold_p_mem_node), GFP_KERNEL);
2305
2306 if (!hold_bus_node || !hold_IO_node || !hold_mem_node || !hold_p_mem_node) {
2307 kfree(hold_bus_node);
2308 kfree(hold_IO_node);
2309 kfree(hold_mem_node);
2310 kfree(hold_p_mem_node);
2311
2312 return 1;
2313 }
2314
2315 memcpy(hold_bus_node, bus_node, sizeof(struct pci_resource));
2316
2317 bus_node->base += 1;
2318 bus_node->length -= 1;
2319 bus_node->next = NULL;
2320
2321 /* If we have IO resources copy them and fill in the bridge's
2322 * IO range registers
2323 */
2324 if (io_node) {
2325 memcpy(hold_IO_node, io_node, sizeof(struct pci_resource));
2326 io_node->next = NULL;
2327
2328 /* set IO base and Limit registers */
2329 RES_CHECK(io_node->base, 8);
2330 temp_byte = (u8)(io_node->base >> 8);
2331 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_BASE, temp_byte);
2332
2333 RES_CHECK(io_node->base + io_node->length - 1, 8);
2334 temp_byte = (u8)((io_node->base + io_node->length - 1) >> 8);
2335 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
2336 } else {
2337 kfree(hold_IO_node);
2338 hold_IO_node = NULL;
2339 }
2340
2341 /* If we have memory resources copy them and fill in the bridge's
2342 * memory range registers. Otherwise, fill in the range
2343 * registers with values that disable them.
2344 */
2345 if (mem_node) {
2346 memcpy(hold_mem_node, mem_node, sizeof(struct pci_resource));
2347 mem_node->next = NULL;
2348
2349 /* set Mem base and Limit registers */
2350 RES_CHECK(mem_node->base, 16);
2351 temp_word = (u32)(mem_node->base >> 16);
2352 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_BASE, temp_word);
2353
2354 RES_CHECK(mem_node->base + mem_node->length - 1, 16);
2355 temp_word = (u32)((mem_node->base + mem_node->length - 1) >> 16);
2356 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2357 } else {
2358 temp_word = 0xFFFF;
2359 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_BASE, temp_word);
2360
2361 temp_word = 0x0000;
2362 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2363
2364 kfree(hold_mem_node);
2365 hold_mem_node = NULL;
2366 }
2367
2368 /* If we have prefetchable memory resources copy them and
2369 * fill in the bridge's memory range registers. Otherwise,
2370 * fill in the range registers with values that disable them.
2371 */
2372 if (p_mem_node) {
2373 memcpy(hold_p_mem_node, p_mem_node, sizeof(struct pci_resource));
2374 p_mem_node->next = NULL;
2375
2376 /* set Pre Mem base and Limit registers */
2377 RES_CHECK(p_mem_node->base, 16);
2378 temp_word = (u32)(p_mem_node->base >> 16);
2379 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word);
2380
2381 RES_CHECK(p_mem_node->base + p_mem_node->length - 1, 16);
2382 temp_word = (u32)((p_mem_node->base + p_mem_node->length - 1) >> 16);
2383 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2384 } else {
2385 temp_word = 0xFFFF;
2386 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word);
2387
2388 temp_word = 0x0000;
2389 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2390
2391 kfree(hold_p_mem_node);
2392 hold_p_mem_node = NULL;
2393 }
2394
2395 /* Adjust this to compensate for extra adjustment in first loop */
2396 irqs.barber_pole--;
2397
2398 rc = 0;
2399
2400 /* Here we actually find the devices and configure them */
2401 for (device = 0; (device <= 0x1F) && !rc; device++) {
2402 irqs.barber_pole = (irqs.barber_pole + 1) & 0x03;
2403
2404 ID = 0xFFFFFFFF;
2405 pci_bus->number = hold_bus_node->base;
2406 pci_bus_read_config_dword(pci_bus, PCI_DEVFN(device, 0),
2407 PCI_VENDOR_ID, &ID);
2408 pci_bus->number = func->bus;
2409
2410 if (ID != 0xFFFFFFFF) { /* device Present */
2411 /* Setup slot structure. */
2412 new_slot = shpchp_slot_create(hold_bus_node->base);
2413
2414 if (new_slot == NULL) {
2415 /* Out of memory */
2416 rc = -ENOMEM;
2417 continue;
2418 }
2419
2420 new_slot->bus = hold_bus_node->base;
2421 new_slot->device = device;
2422 new_slot->function = 0;
2423 new_slot->is_a_board = 1;
2424 new_slot->status = 0;
2425
2426 rc = configure_new_device(ctrl, new_slot, 1, &temp_resources, func->bus, func->device);
2427 dbg("configure_new_device rc=0x%x\n",rc);
2428 } /* End of IF (device in slot?) */
2429 } /* End of FOR loop */
2430
2431 if (rc) {
2432 shpchp_destroy_resource_list(&temp_resources);
2433
2434 return_resource(&(resources->bus_head), hold_bus_node);
2435 return_resource(&(resources->io_head), hold_IO_node);
2436 return_resource(&(resources->mem_head), hold_mem_node);
2437 return_resource(&(resources->p_mem_head), hold_p_mem_node);
2438 return(rc);
2439 }
2440
2441 /* save the interrupt routing information */
2442 if (resources->irqs) {
2443 resources->irqs->interrupt[0] = irqs.interrupt[0];
2444 resources->irqs->interrupt[1] = irqs.interrupt[1];
2445 resources->irqs->interrupt[2] = irqs.interrupt[2];
2446 resources->irqs->interrupt[3] = irqs.interrupt[3];
2447 resources->irqs->valid_INT = irqs.valid_INT;
2448 } else if (!behind_bridge) {
2449 /* We need to hook up the interrupts here */
2450 for (cloop = 0; cloop < 4; cloop++) {
2451 if (irqs.valid_INT & (0x01 << cloop)) {
2452 rc = shpchp_set_irq(func->bus, func->device,
2453 0x0A + cloop, irqs.interrupt[cloop]);
2454 if (rc) {
2455 shpchp_destroy_resource_list (&temp_resources);
2456 return_resource(&(resources->bus_head), hold_bus_node);
2457 return_resource(&(resources->io_head), hold_IO_node);
2458 return_resource(&(resources->mem_head), hold_mem_node);
2459 return_resource(&(resources->p_mem_head), hold_p_mem_node);
2460 return rc;
2461 }
2462 }
2463 } /* end of for loop */
2464 }
2465
2466 /* Return unused bus resources
2467 * First use the temporary node to store information for the board
2468 */
2469 if (hold_bus_node && bus_node && temp_resources.bus_head) {
2470 hold_bus_node->length = bus_node->base - hold_bus_node->base;
2471
2472 hold_bus_node->next = func->bus_head;
2473 func->bus_head = hold_bus_node;
2474
2475 temp_byte = (u8)(temp_resources.bus_head->base - 1);
2476
2477 /* set subordinate bus */
2478 dbg("re-set subordinate bus = 0x%x\n", temp_byte);
2479 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte);
2480
2481 if (temp_resources.bus_head->length == 0) {
2482 kfree(temp_resources.bus_head);
2483 temp_resources.bus_head = NULL;
2484 } else {
2485 dbg("return bus res of b:d(0x%x:%x) base:len(0x%x:%x)\n",
2486 func->bus, func->device, temp_resources.bus_head->base, temp_resources.bus_head->length);
2487 return_resource(&(resources->bus_head), temp_resources.bus_head);
2488 }
2489 }
2490
2491 /* If we have IO space available and there is some left,
2492 * return the unused portion
2493 */
2494 if (hold_IO_node && temp_resources.io_head) {
2495 io_node = do_pre_bridge_resource_split(&(temp_resources.io_head),
2496 &hold_IO_node, 0x1000);
2497
2498 /* Check if we were able to split something off */
2499 if (io_node) {
2500 hold_IO_node->base = io_node->base + io_node->length;
2501
2502 RES_CHECK(hold_IO_node->base, 8);
2503 temp_byte = (u8)((hold_IO_node->base) >> 8);
2504 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_IO_BASE, temp_byte);
2505
2506 return_resource(&(resources->io_head), io_node);
2507 }
2508
2509 io_node = do_bridge_resource_split(&(temp_resources.io_head), 0x1000);
2510
2511 /* Check if we were able to split something off */
2512 if (io_node) {
2513 /* First use the temporary node to store information for the board */
2514 hold_IO_node->length = io_node->base - hold_IO_node->base;
2515
2516 /* If we used any, add it to the board's list */
2517 if (hold_IO_node->length) {
2518 hold_IO_node->next = func->io_head;
2519 func->io_head = hold_IO_node;
2520
2521 RES_CHECK(io_node->base - 1, 8);
2522 temp_byte = (u8)((io_node->base - 1) >> 8);
2523 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
2524
2525 return_resource(&(resources->io_head), io_node);
2526 } else {
2527 /* it doesn't need any IO */
2528 temp_byte = 0x00;
2529 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
2530
2531 return_resource(&(resources->io_head), io_node);
2532 kfree(hold_IO_node);
2533 }
2534 } else {
2535 /* it used most of the range */
2536 hold_IO_node->next = func->io_head;
2537 func->io_head = hold_IO_node;
2538 }
2539 } else if (hold_IO_node) {
2540 /* it used the whole range */
2541 hold_IO_node->next = func->io_head;
2542 func->io_head = hold_IO_node;
2543 }
2544
2545 /* If we have memory space available and there is some left,
2546 * return the unused portion
2547 */
2548 if (hold_mem_node && temp_resources.mem_head) {
2549 mem_node = do_pre_bridge_resource_split(&(temp_resources.mem_head), &hold_mem_node, 0x100000L);
2550
2551 /* Check if we were able to split something off */
2552 if (mem_node) {
2553 hold_mem_node->base = mem_node->base + mem_node->length;
2554
2555 RES_CHECK(hold_mem_node->base, 16);
2556 temp_word = (u32)((hold_mem_node->base) >> 16);
2557 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_BASE, temp_word);
2558
2559 return_resource(&(resources->mem_head), mem_node);
2560 }
2561
2562 mem_node = do_bridge_resource_split(&(temp_resources.mem_head), 0x100000L);
2563
2564 /* Check if we were able to split something off */
2565 if (mem_node) {
2566 /* First use the temporary node to store information for the board */
2567 hold_mem_node->length = mem_node->base - hold_mem_node->base;
2568
2569 if (hold_mem_node->length) {
2570 hold_mem_node->next = func->mem_head;
2571 func->mem_head = hold_mem_node;
2572
2573 /* configure end address */
2574 RES_CHECK(mem_node->base - 1, 16);
2575 temp_word = (u32)((mem_node->base - 1) >> 16);
2576 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2577
2578 /* Return unused resources to the pool */
2579 return_resource(&(resources->mem_head), mem_node);
2580 } else {
2581 /* it doesn't need any Mem */
2582 temp_word = 0x0000;
2583 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2584
2585 return_resource(&(resources->mem_head), mem_node);
2586 kfree(hold_mem_node);
2587 }
2588 } else {
2589 /* it used most of the range */
2590 hold_mem_node->next = func->mem_head;
2591 func->mem_head = hold_mem_node;
2592 }
2593 } else if (hold_mem_node) {
2594 /* it used the whole range */
2595 hold_mem_node->next = func->mem_head;
2596 func->mem_head = hold_mem_node;
2597 }
2598
2599 /* If we have prefetchable memory space available and there is some
2600 * left at the end, return the unused portion
2601 */
2602 if (hold_p_mem_node && temp_resources.p_mem_head) {
2603 p_mem_node = do_pre_bridge_resource_split(&(temp_resources.p_mem_head),
2604 &hold_p_mem_node, 0x100000L);
2605
2606 /* Check if we were able to split something off */
2607 if (p_mem_node) {
2608 hold_p_mem_node->base = p_mem_node->base + p_mem_node->length;
2609
2610 RES_CHECK(hold_p_mem_node->base, 16);
2611 temp_word = (u32)((hold_p_mem_node->base) >> 16);
2612 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word);
2613
2614 return_resource(&(resources->p_mem_head), p_mem_node);
2615 }
2616
2617 p_mem_node = do_bridge_resource_split(&(temp_resources.p_mem_head), 0x100000L);
2618
2619 /* Check if we were able to split something off */
2620 if (p_mem_node) {
2621 /* First use the temporary node to store information for the board */
2622 hold_p_mem_node->length = p_mem_node->base - hold_p_mem_node->base;
2623
2624 /* If we used any, add it to the board's list */
2625 if (hold_p_mem_node->length) {
2626 hold_p_mem_node->next = func->p_mem_head;
2627 func->p_mem_head = hold_p_mem_node;
2628
2629 RES_CHECK(p_mem_node->base - 1, 16);
2630 temp_word = (u32)((p_mem_node->base - 1) >> 16);
2631 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2632
2633 return_resource(&(resources->p_mem_head), p_mem_node);
2634 } else {
2635 /* it doesn't need any PMem */
2636 temp_word = 0x0000;
2637 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2638
2639 return_resource(&(resources->p_mem_head), p_mem_node);
2640 kfree(hold_p_mem_node);
2641 }
2642 } else {
2643 /* it used the most of the range */
2644 hold_p_mem_node->next = func->p_mem_head;
2645 func->p_mem_head = hold_p_mem_node;
2646 }
2647 } else if (hold_p_mem_node) {
2648 /* it used the whole range */
2649 hold_p_mem_node->next = func->p_mem_head;
2650 func->p_mem_head = hold_p_mem_node;
2651 }
2652
2653 /* We should be configuring an IRQ and the bridge's base address
2654 * registers if it needs them. Although we have never seen such
2655 * a device
2656 */
2657
2658 shpchprm_enable_card(ctrl, func, PCI_HEADER_TYPE_BRIDGE);
2659
2660 dbg("PCI Bridge Hot-Added s:b:d:f(%02x:%02x:%02x:%02x)\n", ctrl->seg, func->bus, func->device, func->function);
2661 } else if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_NORMAL) {
2662 /* Standard device */
2663 u64 base64;
2664 rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code);
2665
2666 if (class_code == PCI_BASE_CLASS_DISPLAY)
2667 return (DEVICE_TYPE_NOT_SUPPORTED);
2668
2669 /* Figure out IO and memory needs */
2670 for (cloop = PCI_BASE_ADDRESS_0; cloop <= PCI_BASE_ADDRESS_5; cloop += 4) {
2671 temp_register = 0xFFFFFFFF;
2672
2673 rc = pci_bus_write_config_dword (pci_bus, devfn, cloop, temp_register);
2674 rc = pci_bus_read_config_dword(pci_bus, devfn, cloop, &temp_register);
2675 dbg("Bar[%x]=0x%x on bus:dev:func(0x%x:%x:%x)\n", cloop, temp_register, func->bus, func->device,
2676 func->function);
2677
2678 if (!temp_register)
2679 continue;
2680
2681 base64 = 0L;
2682 if (temp_register & PCI_BASE_ADDRESS_SPACE_IO) {
2683 /* Map IO */
2684
2685 /* set base = amount of IO space */
2686 base = temp_register & 0xFFFFFFFC;
2687 base = ~base + 1;
2688
2689 dbg("NEED IO length(0x%x)\n", base);
2690 io_node = get_io_resource(&(resources->io_head),(ulong)base);
2691
2692 /* allocate the resource to the board */
2693 if (io_node) {
2694 dbg("Got IO base=0x%x(length=0x%x)\n", io_node->base, io_node->length);
2695 base = (u32)io_node->base;
2696 io_node->next = func->io_head;
2697 func->io_head = io_node;
2698 } else {
2699 err("Got NO IO resource(length=0x%x)\n", base);
2700 return -ENOMEM;
2701 }
2702 } else { /* map MEM */
2703 int prefetchable = 1;
2704 struct pci_resource **res_node = &func->p_mem_head;
2705 char *res_type_str = "PMEM";
2706 u32 temp_register2;
2707
2708 if (!(temp_register & PCI_BASE_ADDRESS_MEM_PREFETCH)) {
2709 prefetchable = 0;
2710 res_node = &func->mem_head;
2711 res_type_str++;
2712 }
2713
2714 base = temp_register & 0xFFFFFFF0;
2715 base = ~base + 1;
2716
2717 switch (temp_register & PCI_BASE_ADDRESS_MEM_TYPE_MASK) {
2718 case PCI_BASE_ADDRESS_MEM_TYPE_32:
2719 dbg("NEED 32 %s bar=0x%x(length=0x%x)\n", res_type_str, temp_register, base);
2720
2721 if (prefetchable && resources->p_mem_head)
2722 mem_node=get_resource(&(resources->p_mem_head), (ulong)base);
2723 else {
2724 if (prefetchable)
2725 dbg("using MEM for PMEM\n");
2726 mem_node=get_resource(&(resources->mem_head), (ulong)base);
2727 }
2728
2729 /* allocate the resource to the board */
2730 if (mem_node) {
2731 base = (u32)mem_node->base;
2732 mem_node->next = *res_node;
2733 *res_node = mem_node;
2734 dbg("Got 32 %s base=0x%x(length=0x%x)\n", res_type_str, mem_node->base,
2735 mem_node->length);
2736 } else {
2737 err("Got NO 32 %s resource(length=0x%x)\n", res_type_str, base);
2738 return -ENOMEM;
2739 }
2740 break;
2741 case PCI_BASE_ADDRESS_MEM_TYPE_64:
2742 rc = pci_bus_read_config_dword(pci_bus, devfn, cloop+4, &temp_register2);
2743 dbg("NEED 64 %s bar=0x%x:%x(length=0x%x)\n", res_type_str, temp_register2,
2744 temp_register, base);
2745
2746 if (prefetchable && resources->p_mem_head)
2747 mem_node = get_resource(&(resources->p_mem_head), (ulong)base);
2748 else {
2749 if (prefetchable)
2750 dbg("using MEM for PMEM\n");
2751 mem_node = get_resource(&(resources->mem_head), (ulong)base);
2752 }
2753
2754 /* allocate the resource to the board */
2755 if (mem_node) {
2756 base64 = mem_node->base;
2757 mem_node->next = *res_node;
2758 *res_node = mem_node;
2759 dbg("Got 64 %s base=0x%x:%x(length=%x)\n", res_type_str, (u32)(base64 >> 32),
2760 (u32)base64, mem_node->length);
2761 } else {
2762 err("Got NO 64 %s resource(length=0x%x)\n", res_type_str, base);
2763 return -ENOMEM;
2764 }
2765 break;
2766 default:
2767 dbg("reserved BAR type=0x%x\n", temp_register);
2768 break;
2769 }
2770
2771 }
2772
2773 if (base64) {
2774 rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, (u32)base64);
2775 cloop += 4;
2776 base64 >>= 32;
2777
2778 if (base64) {
2779 dbg("%s: high dword of base64(0x%x) set to 0\n", __FUNCTION__, (u32)base64);
2780 base64 = 0x0L;
2781 }
2782
2783 rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, (u32)base64);
2784 } else {
2785 rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, base);
2786 }
2787 } /* End of base register loop */
2788
2789#if defined(CONFIG_X86_64)
2790 /* Figure out which interrupt pin this function uses */
2791 rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_INTERRUPT_PIN, &temp_byte);
2792
2793 /* If this function needs an interrupt and we are behind a bridge
2794 and the pin is tied to something that's alread mapped,
2795 set this one the same
2796 */
2797 if (temp_byte && resources->irqs &&
2798 (resources->irqs->valid_INT &
2799 (0x01 << ((temp_byte + resources->irqs->barber_pole - 1) & 0x03)))) {
2800 /* We have to share with something already set up */
2801 IRQ = resources->irqs->interrupt[(temp_byte + resources->irqs->barber_pole - 1) & 0x03];
2802 } else {
2803 /* Program IRQ based on card type */
2804 rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code);
2805
2806 if (class_code == PCI_BASE_CLASS_STORAGE) {
2807 IRQ = shpchp_disk_irq;
2808 } else {
2809 IRQ = shpchp_nic_irq;
2810 }
2811 }
2812
2813 /* IRQ Line */
2814 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_INTERRUPT_LINE, IRQ);
2815
2816 if (!behind_bridge) {
2817 rc = shpchp_set_irq(func->bus, func->device, temp_byte + 0x09, IRQ);
2818 if (rc)
2819 return(1);
2820 } else {
2821 /* TBD - this code may also belong in the other clause of this If statement */
2822 resources->irqs->interrupt[(temp_byte + resources->irqs->barber_pole - 1) & 0x03] = IRQ;
2823 resources->irqs->valid_INT |= 0x01 << (temp_byte + resources->irqs->barber_pole - 1) & 0x03;
2824 }
2825#endif
2826 /* Disable ROM base Address */
2827 rc = pci_bus_write_config_dword (pci_bus, devfn, PCI_ROM_ADDRESS, 0x00);
2828
2829 /* Set HP parameters (Cache Line Size, Latency Timer) */
2830 rc = shpchprm_set_hpp(ctrl, func, PCI_HEADER_TYPE_NORMAL);
2831 if (rc)
2832 return rc;
2833
2834 shpchprm_enable_card(ctrl, func, PCI_HEADER_TYPE_NORMAL);
2835
2836 dbg("PCI function Hot-Added s:b:d:f(%02x:%02x:%02x:%02x)\n", ctrl->seg, func->bus, func->device, func->function);
2837 } /* End of Not-A-Bridge else */
2838 else {
2839 /* It's some strange type of PCI adapter (Cardbus?) */
2840 return(DEVICE_TYPE_NOT_SUPPORTED);
2841 }
2842
2843 func->configured = 1;
2844
2845 return 0;
2846}
2847
generated by cgit v1.2.2 (git 2.25.0) at 2024-09-25 13:15:38 -0400