1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Compaq Hot Plug Controller Driver
4 *
5 * Copyright (C) 1995,2001 Compaq Computer Corporation
6 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
7 * Copyright (C) 2001 IBM Corp.
8 *
9 * All rights reserved.
10 *
11 * Send feedback to <greg@kroah.com>
12 *
13 */
14
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/types.h>
18 #include <linux/slab.h>
19 #include <linux/workqueue.h>
20 #include <linux/proc_fs.h>
21 #include <linux/pci.h>
22 #include <linux/pci_hotplug.h>
23 #include "../pci.h"
24 #include "cpqphp.h"
25 #include "cpqphp_nvram.h"
26
27
28 u8 cpqhp_nic_irq;
29 u8 cpqhp_disk_irq;
30
31 static u16 unused_IRQ;
32
33 /*
34 * detect_HRT_floating_pointer
35 *
36 * find the Hot Plug Resource Table in the specified region of memory.
37 *
38 */
detect_HRT_floating_pointer(void __iomem * begin,void __iomem * end)39 static void __iomem *detect_HRT_floating_pointer(void __iomem *begin, void __iomem *end)
40 {
41 void __iomem *fp;
42 void __iomem *endp;
43 u8 temp1, temp2, temp3, temp4;
44 int status = 0;
45
46 endp = (end - sizeof(struct hrt) + 1);
47
48 for (fp = begin; fp <= endp; fp += 16) {
49 temp1 = readb(fp + SIG0);
50 temp2 = readb(fp + SIG1);
51 temp3 = readb(fp + SIG2);
52 temp4 = readb(fp + SIG3);
53 if (temp1 == '$' &&
54 temp2 == 'H' &&
55 temp3 == 'R' &&
56 temp4 == 'T') {
57 status = 1;
58 break;
59 }
60 }
61
62 if (!status)
63 fp = NULL;
64
65 dbg("Discovered Hotplug Resource Table at %p\n", fp);
66 return fp;
67 }
68
69
cpqhp_configure_device(struct controller * ctrl,struct pci_func * func)70 int cpqhp_configure_device(struct controller *ctrl, struct pci_func *func)
71 {
72 struct pci_bus *child;
73 int num;
74
75 pci_lock_rescan_remove();
76
77 if (func->pci_dev == NULL)
78 func->pci_dev = pci_get_domain_bus_and_slot(0, func->bus,
79 PCI_DEVFN(func->device,
80 func->function));
81
82 /* No pci device, we need to create it then */
83 if (func->pci_dev == NULL) {
84 dbg("INFO: pci_dev still null\n");
85
86 num = pci_scan_slot(ctrl->pci_dev->bus, PCI_DEVFN(func->device, func->function));
87 if (num)
88 pci_bus_add_devices(ctrl->pci_dev->bus);
89
90 func->pci_dev = pci_get_domain_bus_and_slot(0, func->bus,
91 PCI_DEVFN(func->device,
92 func->function));
93 if (func->pci_dev == NULL) {
94 dbg("ERROR: pci_dev still null\n");
95 goto out;
96 }
97 }
98
99 if (func->pci_dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
100 pci_hp_add_bridge(func->pci_dev);
101 child = func->pci_dev->subordinate;
102 if (child)
103 pci_bus_add_devices(child);
104 }
105
106 pci_dev_put(func->pci_dev);
107
108 out:
109 pci_unlock_rescan_remove();
110 return 0;
111 }
112
113
cpqhp_unconfigure_device(struct pci_func * func)114 int cpqhp_unconfigure_device(struct pci_func *func)
115 {
116 int j;
117
118 dbg("%s: bus/dev/func = %x/%x/%x\n", __func__, func->bus, func->device, func->function);
119
120 pci_lock_rescan_remove();
121 for (j = 0; j < 8 ; j++) {
122 struct pci_dev *temp = pci_get_domain_bus_and_slot(0,
123 func->bus,
124 PCI_DEVFN(func->device,
125 j));
126 if (temp) {
127 pci_dev_put(temp);
128 pci_stop_and_remove_bus_device(temp);
129 }
130 }
131 pci_unlock_rescan_remove();
132 return 0;
133 }
134
PCI_RefinedAccessConfig(struct pci_bus * bus,unsigned int devfn,u8 offset,u32 * value)135 static int PCI_RefinedAccessConfig(struct pci_bus *bus, unsigned int devfn, u8 offset, u32 *value)
136 {
137 u32 vendID = 0;
138
139 if (pci_bus_read_config_dword(bus, devfn, PCI_VENDOR_ID, &vendID) == -1)
140 return -1;
141 if (vendID == 0xffffffff)
142 return -1;
143 return pci_bus_read_config_dword(bus, devfn, offset, value);
144 }
145
146
147 /*
148 * cpqhp_set_irq
149 *
150 * @bus_num: bus number of PCI device
151 * @dev_num: device number of PCI device
152 * @slot: pointer to u8 where slot number will be returned
153 */
cpqhp_set_irq(u8 bus_num,u8 dev_num,u8 int_pin,u8 irq_num)154 int cpqhp_set_irq(u8 bus_num, u8 dev_num, u8 int_pin, u8 irq_num)
155 {
156 int rc = 0;
157
158 if (cpqhp_legacy_mode) {
159 struct pci_dev *fakedev;
160 struct pci_bus *fakebus;
161 u16 temp_word;
162
163 fakedev = kmalloc(sizeof(*fakedev), GFP_KERNEL);
164 fakebus = kmalloc(sizeof(*fakebus), GFP_KERNEL);
165 if (!fakedev || !fakebus) {
166 kfree(fakedev);
167 kfree(fakebus);
168 return -ENOMEM;
169 }
170
171 fakedev->devfn = dev_num << 3;
172 fakedev->bus = fakebus;
173 fakebus->number = bus_num;
174 dbg("%s: dev %d, bus %d, pin %d, num %d\n",
175 __func__, dev_num, bus_num, int_pin, irq_num);
176 rc = pcibios_set_irq_routing(fakedev, int_pin - 1, irq_num);
177 kfree(fakedev);
178 kfree(fakebus);
179 dbg("%s: rc %d\n", __func__, rc);
180 if (!rc)
181 return !rc;
182
183 /* set the Edge Level Control Register (ELCR) */
184 temp_word = inb(0x4d0);
185 temp_word |= inb(0x4d1) << 8;
186
187 temp_word |= 0x01 << irq_num;
188
189 /* This should only be for x86 as it sets the Edge Level
190 * Control Register
191 */
192 outb((u8) (temp_word & 0xFF), 0x4d0); outb((u8) ((temp_word &
193 0xFF00) >> 8), 0x4d1); rc = 0; }
194
195 return rc;
196 }
197
198
PCI_ScanBusForNonBridge(struct controller * ctrl,u8 bus_num,u8 * dev_num)199 static int PCI_ScanBusForNonBridge(struct controller *ctrl, u8 bus_num, u8 *dev_num)
200 {
201 u16 tdevice;
202 u32 work;
203 u8 tbus;
204
205 ctrl->pci_bus->number = bus_num;
206
207 for (tdevice = 0; tdevice < 0xFF; tdevice++) {
208 /* Scan for access first */
209 if (PCI_RefinedAccessConfig(ctrl->pci_bus, tdevice, 0x08, &work) == -1)
210 continue;
211 dbg("Looking for nonbridge bus_num %d dev_num %d\n", bus_num, tdevice);
212 /* Yep we got one. Not a bridge ? */
213 if ((work >> 8) != PCI_TO_PCI_BRIDGE_CLASS) {
214 *dev_num = tdevice;
215 dbg("found it !\n");
216 return 0;
217 }
218 }
219 for (tdevice = 0; tdevice < 0xFF; tdevice++) {
220 /* Scan for access first */
221 if (PCI_RefinedAccessConfig(ctrl->pci_bus, tdevice, 0x08, &work) == -1)
222 continue;
223 dbg("Looking for bridge bus_num %d dev_num %d\n", bus_num, tdevice);
224 /* Yep we got one. bridge ? */
225 if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) {
226 pci_bus_read_config_byte(ctrl->pci_bus, PCI_DEVFN(tdevice, 0), PCI_SECONDARY_BUS, &tbus);
227 /* XXX: no recursion, wtf? */
228 dbg("Recurse on bus_num %d tdevice %d\n", tbus, tdevice);
229 return 0;
230 }
231 }
232
233 return -1;
234 }
235
236
PCI_GetBusDevHelper(struct controller * ctrl,u8 * bus_num,u8 * dev_num,u8 slot,u8 nobridge)237 static int PCI_GetBusDevHelper(struct controller *ctrl, u8 *bus_num, u8 *dev_num, u8 slot, u8 nobridge)
238 {
239 int loop, len;
240 u32 work;
241 u8 tbus, tdevice, tslot;
242
243 len = cpqhp_routing_table_length();
244 for (loop = 0; loop < len; ++loop) {
245 tbus = cpqhp_routing_table->slots[loop].bus;
246 tdevice = cpqhp_routing_table->slots[loop].devfn;
247 tslot = cpqhp_routing_table->slots[loop].slot;
248
249 if (tslot == slot) {
250 *bus_num = tbus;
251 *dev_num = tdevice;
252 ctrl->pci_bus->number = tbus;
253 pci_bus_read_config_dword(ctrl->pci_bus, *dev_num, PCI_VENDOR_ID, &work);
254 if (!nobridge || (work == 0xffffffff))
255 return 0;
256
257 dbg("bus_num %d devfn %d\n", *bus_num, *dev_num);
258 pci_bus_read_config_dword(ctrl->pci_bus, *dev_num, PCI_CLASS_REVISION, &work);
259 dbg("work >> 8 (%x) = BRIDGE (%x)\n", work >> 8, PCI_TO_PCI_BRIDGE_CLASS);
260
261 if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) {
262 pci_bus_read_config_byte(ctrl->pci_bus, *dev_num, PCI_SECONDARY_BUS, &tbus);
263 dbg("Scan bus for Non Bridge: bus %d\n", tbus);
264 if (PCI_ScanBusForNonBridge(ctrl, tbus, dev_num) == 0) {
265 *bus_num = tbus;
266 return 0;
267 }
268 } else
269 return 0;
270 }
271 }
272 return -1;
273 }
274
275
cpqhp_get_bus_dev(struct controller * ctrl,u8 * bus_num,u8 * dev_num,u8 slot)276 int cpqhp_get_bus_dev(struct controller *ctrl, u8 *bus_num, u8 *dev_num, u8 slot)
277 {
278 /* plain (bridges allowed) */
279 return PCI_GetBusDevHelper(ctrl, bus_num, dev_num, slot, 0);
280 }
281
282
283 /* More PCI configuration routines; this time centered around hotplug
284 * controller
285 */
286
287
288 /*
289 * cpqhp_save_config
290 *
291 * Reads configuration for all slots in a PCI bus and saves info.
292 *
293 * Note: For non-hot plug buses, the slot # saved is the device #
294 *
295 * returns 0 if success
296 */
cpqhp_save_config(struct controller * ctrl,int busnumber,int is_hot_plug)297 int cpqhp_save_config(struct controller *ctrl, int busnumber, int is_hot_plug)
298 {
299 long rc;
300 u8 class_code;
301 u8 header_type;
302 u32 ID;
303 u8 secondary_bus;
304 struct pci_func *new_slot;
305 int sub_bus;
306 int FirstSupported;
307 int LastSupported;
308 int max_functions;
309 int function;
310 u8 DevError;
311 int device = 0;
312 int cloop = 0;
313 int stop_it;
314 int index;
315 u16 devfn;
316
317 /* Decide which slots are supported */
318
319 if (is_hot_plug) {
320 /*
321 * is_hot_plug is the slot mask
322 */
323 FirstSupported = is_hot_plug >> 4;
324 LastSupported = FirstSupported + (is_hot_plug & 0x0F) - 1;
325 } else {
326 FirstSupported = 0;
327 LastSupported = 0x1F;
328 }
329
330 /* Save PCI configuration space for all devices in supported slots */
331 ctrl->pci_bus->number = busnumber;
332 for (device = FirstSupported; device <= LastSupported; device++) {
333 ID = 0xFFFFFFFF;
334 rc = pci_bus_read_config_dword(ctrl->pci_bus, PCI_DEVFN(device, 0), PCI_VENDOR_ID, &ID);
335
336 if (ID == 0xFFFFFFFF) {
337 if (is_hot_plug) {
338 /* Setup slot structure with entry for empty
339 * slot
340 */
341 new_slot = cpqhp_slot_create(busnumber);
342 if (new_slot == NULL)
343 return 1;
344
345 new_slot->bus = (u8) busnumber;
346 new_slot->device = (u8) device;
347 new_slot->function = 0;
348 new_slot->is_a_board = 0;
349 new_slot->presence_save = 0;
350 new_slot->switch_save = 0;
351 }
352 continue;
353 }
354
355 rc = pci_bus_read_config_byte(ctrl->pci_bus, PCI_DEVFN(device, 0), 0x0B, &class_code);
356 if (rc)
357 return rc;
358
359 rc = pci_bus_read_config_byte(ctrl->pci_bus, PCI_DEVFN(device, 0), PCI_HEADER_TYPE, &header_type);
360 if (rc)
361 return rc;
362
363 /* If multi-function device, set max_functions to 8 */
364 if (header_type & 0x80)
365 max_functions = 8;
366 else
367 max_functions = 1;
368
369 function = 0;
370
371 do {
372 DevError = 0;
373 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
374 /* Recurse the subordinate bus
375 * get the subordinate bus number
376 */
377 rc = pci_bus_read_config_byte(ctrl->pci_bus, PCI_DEVFN(device, function), PCI_SECONDARY_BUS, &secondary_bus);
378 if (rc) {
379 return rc;
380 } else {
381 sub_bus = (int) secondary_bus;
382
383 /* Save secondary bus cfg spc
384 * with this recursive call.
385 */
386 rc = cpqhp_save_config(ctrl, sub_bus, 0);
387 if (rc)
388 return rc;
389 ctrl->pci_bus->number = busnumber;
390 }
391 }
392
393 index = 0;
394 new_slot = cpqhp_slot_find(busnumber, device, index++);
395 while (new_slot &&
396 (new_slot->function != (u8) function))
397 new_slot = cpqhp_slot_find(busnumber, device, index++);
398
399 if (!new_slot) {
400 /* Setup slot structure. */
401 new_slot = cpqhp_slot_create(busnumber);
402 if (new_slot == NULL)
403 return 1;
404 }
405
406 new_slot->bus = (u8) busnumber;
407 new_slot->device = (u8) device;
408 new_slot->function = (u8) function;
409 new_slot->is_a_board = 1;
410 new_slot->switch_save = 0x10;
411 /* In case of unsupported board */
412 new_slot->status = DevError;
413 devfn = (new_slot->device << 3) | new_slot->function;
414 new_slot->pci_dev = pci_get_domain_bus_and_slot(0,
415 new_slot->bus, devfn);
416
417 for (cloop = 0; cloop < 0x20; cloop++) {
418 rc = pci_bus_read_config_dword(ctrl->pci_bus, PCI_DEVFN(device, function), cloop << 2, (u32 *) &(new_slot->config_space[cloop]));
419 if (rc)
420 return rc;
421 }
422
423 pci_dev_put(new_slot->pci_dev);
424
425 function++;
426
427 stop_it = 0;
428
429 /* this loop skips to the next present function
430 * reading in Class Code and Header type.
431 */
432 while ((function < max_functions) && (!stop_it)) {
433 rc = pci_bus_read_config_dword(ctrl->pci_bus, PCI_DEVFN(device, function), PCI_VENDOR_ID, &ID);
434 if (ID == 0xFFFFFFFF) {
435 function++;
436 continue;
437 }
438 rc = pci_bus_read_config_byte(ctrl->pci_bus, PCI_DEVFN(device, function), 0x0B, &class_code);
439 if (rc)
440 return rc;
441
442 rc = pci_bus_read_config_byte(ctrl->pci_bus, PCI_DEVFN(device, function), PCI_HEADER_TYPE, &header_type);
443 if (rc)
444 return rc;
445
446 stop_it++;
447 }
448
449 } while (function < max_functions);
450 } /* End of FOR loop */
451
452 return 0;
453 }
454
455
456 /*
457 * cpqhp_save_slot_config
458 *
459 * Saves configuration info for all PCI devices in a given slot
460 * including subordinate buses.
461 *
462 * returns 0 if success
463 */
cpqhp_save_slot_config(struct controller * ctrl,struct pci_func * new_slot)464 int cpqhp_save_slot_config(struct controller *ctrl, struct pci_func *new_slot)
465 {
466 long rc;
467 u8 class_code;
468 u8 header_type;
469 u32 ID;
470 u8 secondary_bus;
471 int sub_bus;
472 int max_functions;
473 int function = 0;
474 int cloop = 0;
475 int stop_it;
476
477 ID = 0xFFFFFFFF;
478
479 ctrl->pci_bus->number = new_slot->bus;
480 pci_bus_read_config_dword(ctrl->pci_bus, PCI_DEVFN(new_slot->device, 0), PCI_VENDOR_ID, &ID);
481
482 if (ID == 0xFFFFFFFF)
483 return 2;
484
485 pci_bus_read_config_byte(ctrl->pci_bus, PCI_DEVFN(new_slot->device, 0), 0x0B, &class_code);
486 pci_bus_read_config_byte(ctrl->pci_bus, PCI_DEVFN(new_slot->device, 0), PCI_HEADER_TYPE, &header_type);
487
488 if (header_type & 0x80) /* Multi-function device */
489 max_functions = 8;
490 else
491 max_functions = 1;
492
493 while (function < max_functions) {
494 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
495 /* Recurse the subordinate bus */
496 pci_bus_read_config_byte(ctrl->pci_bus, PCI_DEVFN(new_slot->device, function), PCI_SECONDARY_BUS, &secondary_bus);
497
498 sub_bus = (int) secondary_bus;
499
500 /* Save the config headers for the secondary
501 * bus.
502 */
503 rc = cpqhp_save_config(ctrl, sub_bus, 0);
504 if (rc)
505 return(rc);
506 ctrl->pci_bus->number = new_slot->bus;
507
508 }
509
510 new_slot->status = 0;
511
512 for (cloop = 0; cloop < 0x20; cloop++)
513 pci_bus_read_config_dword(ctrl->pci_bus, PCI_DEVFN(new_slot->device, function), cloop << 2, (u32 *) &(new_slot->config_space[cloop]));
514
515 function++;
516
517 stop_it = 0;
518
519 /* this loop skips to the next present function
520 * reading in the Class Code and the Header type.
521 */
522 while ((function < max_functions) && (!stop_it)) {
523 pci_bus_read_config_dword(ctrl->pci_bus, PCI_DEVFN(new_slot->device, function), PCI_VENDOR_ID, &ID);
524
525 if (ID == 0xFFFFFFFF)
526 function++;
527 else {
528 pci_bus_read_config_byte(ctrl->pci_bus, PCI_DEVFN(new_slot->device, function), 0x0B, &class_code);
529 pci_bus_read_config_byte(ctrl->pci_bus, PCI_DEVFN(new_slot->device, function), PCI_HEADER_TYPE, &header_type);
530 stop_it++;
531 }
532 }
533
534 }
535
536 return 0;
537 }
538
539
540 /*
541 * cpqhp_save_base_addr_length
542 *
543 * Saves the length of all base address registers for the
544 * specified slot. this is for hot plug REPLACE
545 *
546 * returns 0 if success
547 */
cpqhp_save_base_addr_length(struct controller * ctrl,struct pci_func * func)548 int cpqhp_save_base_addr_length(struct controller *ctrl, struct pci_func *func)
549 {
550 u8 cloop;
551 u8 header_type;
552 u8 secondary_bus;
553 u8 type;
554 int sub_bus;
555 u32 temp_register;
556 u32 base;
557 u32 rc;
558 struct pci_func *next;
559 int index = 0;
560 struct pci_bus *pci_bus = ctrl->pci_bus;
561 unsigned int devfn;
562
563 func = cpqhp_slot_find(func->bus, func->device, index++);
564
565 while (func != NULL) {
566 pci_bus->number = func->bus;
567 devfn = PCI_DEVFN(func->device, func->function);
568
569 /* Check for Bridge */
570 pci_bus_read_config_byte(pci_bus, devfn, PCI_HEADER_TYPE, &header_type);
571
572 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
573 pci_bus_read_config_byte(pci_bus, devfn, PCI_SECONDARY_BUS, &secondary_bus);
574
575 sub_bus = (int) secondary_bus;
576
577 next = cpqhp_slot_list[sub_bus];
578
579 while (next != NULL) {
580 rc = cpqhp_save_base_addr_length(ctrl, next);
581 if (rc)
582 return rc;
583
584 next = next->next;
585 }
586 pci_bus->number = func->bus;
587
588 /* FIXME: this loop is duplicated in the non-bridge
589 * case. The two could be rolled together Figure out
590 * IO and memory base lengths
591 */
592 for (cloop = 0x10; cloop <= 0x14; cloop += 4) {
593 temp_register = 0xFFFFFFFF;
594 pci_bus_write_config_dword(pci_bus, devfn, cloop, temp_register);
595 pci_bus_read_config_dword(pci_bus, devfn, cloop, &base);
596 /* If this register is implemented */
597 if (base) {
598 if (base & 0x01L) {
599 /* IO base
600 * set base = amount of IO space
601 * requested
602 */
603 base = base & 0xFFFFFFFE;
604 base = (~base) + 1;
605
606 type = 1;
607 } else {
608 /* memory base */
609 base = base & 0xFFFFFFF0;
610 base = (~base) + 1;
611
612 type = 0;
613 }
614 } else {
615 base = 0x0L;
616 type = 0;
617 }
618
619 /* Save information in slot structure */
620 func->base_length[(cloop - 0x10) >> 2] =
621 base;
622 func->base_type[(cloop - 0x10) >> 2] = type;
623
624 } /* End of base register loop */
625
626 } else if ((header_type & 0x7F) == 0x00) {
627 /* Figure out IO and memory base lengths */
628 for (cloop = 0x10; cloop <= 0x24; cloop += 4) {
629 temp_register = 0xFFFFFFFF;
630 pci_bus_write_config_dword(pci_bus, devfn, cloop, temp_register);
631 pci_bus_read_config_dword(pci_bus, devfn, cloop, &base);
632
633 /* If this register is implemented */
634 if (base) {
635 if (base & 0x01L) {
636 /* IO base
637 * base = amount of IO space
638 * requested
639 */
640 base = base & 0xFFFFFFFE;
641 base = (~base) + 1;
642
643 type = 1;
644 } else {
645 /* memory base
646 * base = amount of memory
647 * space requested
648 */
649 base = base & 0xFFFFFFF0;
650 base = (~base) + 1;
651
652 type = 0;
653 }
654 } else {
655 base = 0x0L;
656 type = 0;
657 }
658
659 /* Save information in slot structure */
660 func->base_length[(cloop - 0x10) >> 2] = base;
661 func->base_type[(cloop - 0x10) >> 2] = type;
662
663 } /* End of base register loop */
664
665 } else { /* Some other unknown header type */
666 }
667
668 /* find the next device in this slot */
669 func = cpqhp_slot_find(func->bus, func->device, index++);
670 }
671
672 return(0);
673 }
674
675
676 /*
677 * cpqhp_save_used_resources
678 *
679 * Stores used resource information for existing boards. this is
680 * for boards that were in the system when this driver was loaded.
681 * this function is for hot plug ADD
682 *
683 * returns 0 if success
684 */
cpqhp_save_used_resources(struct controller * ctrl,struct pci_func * func)685 int cpqhp_save_used_resources(struct controller *ctrl, struct pci_func *func)
686 {
687 u8 cloop;
688 u8 header_type;
689 u8 secondary_bus;
690 u8 temp_byte;
691 u8 b_base;
692 u8 b_length;
693 u16 command;
694 u16 save_command;
695 u16 w_base;
696 u16 w_length;
697 u32 temp_register;
698 u32 save_base;
699 u32 base;
700 int index = 0;
701 struct pci_resource *mem_node;
702 struct pci_resource *p_mem_node;
703 struct pci_resource *io_node;
704 struct pci_resource *bus_node;
705 struct pci_bus *pci_bus = ctrl->pci_bus;
706 unsigned int devfn;
707
708 func = cpqhp_slot_find(func->bus, func->device, index++);
709
710 while ((func != NULL) && func->is_a_board) {
711 pci_bus->number = func->bus;
712 devfn = PCI_DEVFN(func->device, func->function);
713
714 /* Save the command register */
715 pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &save_command);
716
717 /* disable card */
718 command = 0x00;
719 pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command);
720
721 /* Check for Bridge */
722 pci_bus_read_config_byte(pci_bus, devfn, PCI_HEADER_TYPE, &header_type);
723
724 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
725 /* Clear Bridge Control Register */
726 command = 0x00;
727 pci_bus_write_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, command);
728 pci_bus_read_config_byte(pci_bus, devfn, PCI_SECONDARY_BUS, &secondary_bus);
729 pci_bus_read_config_byte(pci_bus, devfn, PCI_SUBORDINATE_BUS, &temp_byte);
730
731 bus_node = kmalloc(sizeof(*bus_node), GFP_KERNEL);
732 if (!bus_node)
733 return -ENOMEM;
734
735 bus_node->base = secondary_bus;
736 bus_node->length = temp_byte - secondary_bus + 1;
737
738 bus_node->next = func->bus_head;
739 func->bus_head = bus_node;
740
741 /* Save IO base and Limit registers */
742 pci_bus_read_config_byte(pci_bus, devfn, PCI_IO_BASE, &b_base);
743 pci_bus_read_config_byte(pci_bus, devfn, PCI_IO_LIMIT, &b_length);
744
745 if ((b_base <= b_length) && (save_command & 0x01)) {
746 io_node = kmalloc(sizeof(*io_node), GFP_KERNEL);
747 if (!io_node)
748 return -ENOMEM;
749
750 io_node->base = (b_base & 0xF0) << 8;
751 io_node->length = (b_length - b_base + 0x10) << 8;
752
753 io_node->next = func->io_head;
754 func->io_head = io_node;
755 }
756
757 /* Save memory base and Limit registers */
758 pci_bus_read_config_word(pci_bus, devfn, PCI_MEMORY_BASE, &w_base);
759 pci_bus_read_config_word(pci_bus, devfn, PCI_MEMORY_LIMIT, &w_length);
760
761 if ((w_base <= w_length) && (save_command & 0x02)) {
762 mem_node = kmalloc(sizeof(*mem_node), GFP_KERNEL);
763 if (!mem_node)
764 return -ENOMEM;
765
766 mem_node->base = w_base << 16;
767 mem_node->length = (w_length - w_base + 0x10) << 16;
768
769 mem_node->next = func->mem_head;
770 func->mem_head = mem_node;
771 }
772
773 /* Save prefetchable memory base and Limit registers */
774 pci_bus_read_config_word(pci_bus, devfn, PCI_PREF_MEMORY_BASE, &w_base);
775 pci_bus_read_config_word(pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, &w_length);
776
777 if ((w_base <= w_length) && (save_command & 0x02)) {
778 p_mem_node = kmalloc(sizeof(*p_mem_node), GFP_KERNEL);
779 if (!p_mem_node)
780 return -ENOMEM;
781
782 p_mem_node->base = w_base << 16;
783 p_mem_node->length = (w_length - w_base + 0x10) << 16;
784
785 p_mem_node->next = func->p_mem_head;
786 func->p_mem_head = p_mem_node;
787 }
788 /* Figure out IO and memory base lengths */
789 for (cloop = 0x10; cloop <= 0x14; cloop += 4) {
790 pci_bus_read_config_dword(pci_bus, devfn, cloop, &save_base);
791
792 temp_register = 0xFFFFFFFF;
793 pci_bus_write_config_dword(pci_bus, devfn, cloop, temp_register);
794 pci_bus_read_config_dword(pci_bus, devfn, cloop, &base);
795
796 temp_register = base;
797
798 /* If this register is implemented */
799 if (base) {
800 if (((base & 0x03L) == 0x01)
801 && (save_command & 0x01)) {
802 /* IO base
803 * set temp_register = amount
804 * of IO space requested
805 */
806 temp_register = base & 0xFFFFFFFE;
807 temp_register = (~temp_register) + 1;
808
809 io_node = kmalloc(sizeof(*io_node),
810 GFP_KERNEL);
811 if (!io_node)
812 return -ENOMEM;
813
814 io_node->base =
815 save_base & (~0x03L);
816 io_node->length = temp_register;
817
818 io_node->next = func->io_head;
819 func->io_head = io_node;
820 } else
821 if (((base & 0x0BL) == 0x08)
822 && (save_command & 0x02)) {
823 /* prefetchable memory base */
824 temp_register = base & 0xFFFFFFF0;
825 temp_register = (~temp_register) + 1;
826
827 p_mem_node = kmalloc(sizeof(*p_mem_node),
828 GFP_KERNEL);
829 if (!p_mem_node)
830 return -ENOMEM;
831
832 p_mem_node->base = save_base & (~0x0FL);
833 p_mem_node->length = temp_register;
834
835 p_mem_node->next = func->p_mem_head;
836 func->p_mem_head = p_mem_node;
837 } else
838 if (((base & 0x0BL) == 0x00)
839 && (save_command & 0x02)) {
840 /* prefetchable memory base */
841 temp_register = base & 0xFFFFFFF0;
842 temp_register = (~temp_register) + 1;
843
844 mem_node = kmalloc(sizeof(*mem_node),
845 GFP_KERNEL);
846 if (!mem_node)
847 return -ENOMEM;
848
849 mem_node->base = save_base & (~0x0FL);
850 mem_node->length = temp_register;
851
852 mem_node->next = func->mem_head;
853 func->mem_head = mem_node;
854 } else
855 return(1);
856 }
857 } /* End of base register loop */
858 /* Standard header */
859 } else if ((header_type & 0x7F) == 0x00) {
860 /* Figure out IO and memory base lengths */
861 for (cloop = 0x10; cloop <= 0x24; cloop += 4) {
862 pci_bus_read_config_dword(pci_bus, devfn, cloop, &save_base);
863
864 temp_register = 0xFFFFFFFF;
865 pci_bus_write_config_dword(pci_bus, devfn, cloop, temp_register);
866 pci_bus_read_config_dword(pci_bus, devfn, cloop, &base);
867
868 temp_register = base;
869
870 /* If this register is implemented */
871 if (base) {
872 if (((base & 0x03L) == 0x01)
873 && (save_command & 0x01)) {
874 /* IO base
875 * set temp_register = amount
876 * of IO space requested
877 */
878 temp_register = base & 0xFFFFFFFE;
879 temp_register = (~temp_register) + 1;
880
881 io_node = kmalloc(sizeof(*io_node),
882 GFP_KERNEL);
883 if (!io_node)
884 return -ENOMEM;
885
886 io_node->base = save_base & (~0x01L);
887 io_node->length = temp_register;
888
889 io_node->next = func->io_head;
890 func->io_head = io_node;
891 } else
892 if (((base & 0x0BL) == 0x08)
893 && (save_command & 0x02)) {
894 /* prefetchable memory base */
895 temp_register = base & 0xFFFFFFF0;
896 temp_register = (~temp_register) + 1;
897
898 p_mem_node = kmalloc(sizeof(*p_mem_node),
899 GFP_KERNEL);
900 if (!p_mem_node)
901 return -ENOMEM;
902
903 p_mem_node->base = save_base & (~0x0FL);
904 p_mem_node->length = temp_register;
905
906 p_mem_node->next = func->p_mem_head;
907 func->p_mem_head = p_mem_node;
908 } else
909 if (((base & 0x0BL) == 0x00)
910 && (save_command & 0x02)) {
911 /* prefetchable memory base */
912 temp_register = base & 0xFFFFFFF0;
913 temp_register = (~temp_register) + 1;
914
915 mem_node = kmalloc(sizeof(*mem_node),
916 GFP_KERNEL);
917 if (!mem_node)
918 return -ENOMEM;
919
920 mem_node->base = save_base & (~0x0FL);
921 mem_node->length = temp_register;
922
923 mem_node->next = func->mem_head;
924 func->mem_head = mem_node;
925 } else
926 return(1);
927 }
928 } /* End of base register loop */
929 }
930
931 /* find the next device in this slot */
932 func = cpqhp_slot_find(func->bus, func->device, index++);
933 }
934
935 return 0;
936 }
937
938
939 /*
940 * cpqhp_configure_board
941 *
942 * Copies saved configuration information to one slot.
943 * this is called recursively for bridge devices.
944 * this is for hot plug REPLACE!
945 *
946 * returns 0 if success
947 */
cpqhp_configure_board(struct controller * ctrl,struct pci_func * func)948 int cpqhp_configure_board(struct controller *ctrl, struct pci_func *func)
949 {
950 int cloop;
951 u8 header_type;
952 u8 secondary_bus;
953 int sub_bus;
954 struct pci_func *next;
955 u32 temp;
956 u32 rc;
957 int index = 0;
958 struct pci_bus *pci_bus = ctrl->pci_bus;
959 unsigned int devfn;
960
961 func = cpqhp_slot_find(func->bus, func->device, index++);
962
963 while (func != NULL) {
964 pci_bus->number = func->bus;
965 devfn = PCI_DEVFN(func->device, func->function);
966
967 /* Start at the top of config space so that the control
968 * registers are programmed last
969 */
970 for (cloop = 0x3C; cloop > 0; cloop -= 4)
971 pci_bus_write_config_dword(pci_bus, devfn, cloop, func->config_space[cloop >> 2]);
972
973 pci_bus_read_config_byte(pci_bus, devfn, PCI_HEADER_TYPE, &header_type);
974
975 /* If this is a bridge device, restore subordinate devices */
976 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
977 pci_bus_read_config_byte(pci_bus, devfn, PCI_SECONDARY_BUS, &secondary_bus);
978
979 sub_bus = (int) secondary_bus;
980
981 next = cpqhp_slot_list[sub_bus];
982
983 while (next != NULL) {
984 rc = cpqhp_configure_board(ctrl, next);
985 if (rc)
986 return rc;
987
988 next = next->next;
989 }
990 } else {
991
992 /* Check all the base Address Registers to make sure
993 * they are the same. If not, the board is different.
994 */
995
996 for (cloop = 16; cloop < 40; cloop += 4) {
997 pci_bus_read_config_dword(pci_bus, devfn, cloop, &temp);
998
999 if (temp != func->config_space[cloop >> 2]) {
1000 dbg("Config space compare failure!!! offset = %x\n", cloop);
1001 dbg("bus = %x, device = %x, function = %x\n", func->bus, func->device, func->function);
1002 dbg("temp = %x, config space = %x\n\n", temp, func->config_space[cloop >> 2]);
1003 return 1;
1004 }
1005 }
1006 }
1007
1008 func->configured = 1;
1009
1010 func = cpqhp_slot_find(func->bus, func->device, index++);
1011 }
1012
1013 return 0;
1014 }
1015
1016
1017 /*
1018 * cpqhp_valid_replace
1019 *
1020 * this function checks to see if a board is the same as the
1021 * one it is replacing. this check will detect if the device's
1022 * vendor or device id's are the same
1023 *
1024 * returns 0 if the board is the same nonzero otherwise
1025 */
cpqhp_valid_replace(struct controller * ctrl,struct pci_func * func)1026 int cpqhp_valid_replace(struct controller *ctrl, struct pci_func *func)
1027 {
1028 u8 cloop;
1029 u8 header_type;
1030 u8 secondary_bus;
1031 u8 type;
1032 u32 temp_register = 0;
1033 u32 base;
1034 u32 rc;
1035 struct pci_func *next;
1036 int index = 0;
1037 struct pci_bus *pci_bus = ctrl->pci_bus;
1038 unsigned int devfn;
1039
1040 if (!func->is_a_board)
1041 return(ADD_NOT_SUPPORTED);
1042
1043 func = cpqhp_slot_find(func->bus, func->device, index++);
1044
1045 while (func != NULL) {
1046 pci_bus->number = func->bus;
1047 devfn = PCI_DEVFN(func->device, func->function);
1048
1049 pci_bus_read_config_dword(pci_bus, devfn, PCI_VENDOR_ID, &temp_register);
1050
1051 /* No adapter present */
1052 if (temp_register == 0xFFFFFFFF)
1053 return(NO_ADAPTER_PRESENT);
1054
1055 if (temp_register != func->config_space[0])
1056 return(ADAPTER_NOT_SAME);
1057
1058 /* Check for same revision number and class code */
1059 pci_bus_read_config_dword(pci_bus, devfn, PCI_CLASS_REVISION, &temp_register);
1060
1061 /* Adapter not the same */
1062 if (temp_register != func->config_space[0x08 >> 2])
1063 return(ADAPTER_NOT_SAME);
1064
1065 /* Check for Bridge */
1066 pci_bus_read_config_byte(pci_bus, devfn, PCI_HEADER_TYPE, &header_type);
1067
1068 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
1069 /* In order to continue checking, we must program the
1070 * bus registers in the bridge to respond to accesses
1071 * for its subordinate bus(es)
1072 */
1073
1074 temp_register = func->config_space[0x18 >> 2];
1075 pci_bus_write_config_dword(pci_bus, devfn, PCI_PRIMARY_BUS, temp_register);
1076
1077 secondary_bus = (temp_register >> 8) & 0xFF;
1078
1079 next = cpqhp_slot_list[secondary_bus];
1080
1081 while (next != NULL) {
1082 rc = cpqhp_valid_replace(ctrl, next);
1083 if (rc)
1084 return rc;
1085
1086 next = next->next;
1087 }
1088
1089 }
1090 /* Check to see if it is a standard config header */
1091 else if ((header_type & 0x7F) == PCI_HEADER_TYPE_NORMAL) {
1092 /* Check subsystem vendor and ID */
1093 pci_bus_read_config_dword(pci_bus, devfn, PCI_SUBSYSTEM_VENDOR_ID, &temp_register);
1094
1095 if (temp_register != func->config_space[0x2C >> 2]) {
1096 /* If it's a SMART-2 and the register isn't
1097 * filled in, ignore the difference because
1098 * they just have an old rev of the firmware
1099 */
1100 if (!((func->config_space[0] == 0xAE100E11)
1101 && (temp_register == 0x00L)))
1102 return(ADAPTER_NOT_SAME);
1103 }
1104 /* Figure out IO and memory base lengths */
1105 for (cloop = 0x10; cloop <= 0x24; cloop += 4) {
1106 temp_register = 0xFFFFFFFF;
1107 pci_bus_write_config_dword(pci_bus, devfn, cloop, temp_register);
1108 pci_bus_read_config_dword(pci_bus, devfn, cloop, &base);
1109
1110 /* If this register is implemented */
1111 if (base) {
1112 if (base & 0x01L) {
1113 /* IO base
1114 * set base = amount of IO
1115 * space requested
1116 */
1117 base = base & 0xFFFFFFFE;
1118 base = (~base) + 1;
1119
1120 type = 1;
1121 } else {
1122 /* memory base */
1123 base = base & 0xFFFFFFF0;
1124 base = (~base) + 1;
1125
1126 type = 0;
1127 }
1128 } else {
1129 base = 0x0L;
1130 type = 0;
1131 }
1132
1133 /* Check information in slot structure */
1134 if (func->base_length[(cloop - 0x10) >> 2] != base)
1135 return(ADAPTER_NOT_SAME);
1136
1137 if (func->base_type[(cloop - 0x10) >> 2] != type)
1138 return(ADAPTER_NOT_SAME);
1139
1140 } /* End of base register loop */
1141
1142 } /* End of (type 0 config space) else */
1143 else {
1144 /* this is not a type 0 or 1 config space header so
1145 * we don't know how to do it
1146 */
1147 return(DEVICE_TYPE_NOT_SUPPORTED);
1148 }
1149
1150 /* Get the next function */
1151 func = cpqhp_slot_find(func->bus, func->device, index++);
1152 }
1153
1154
1155 return 0;
1156 }
1157
1158
1159 /*
1160 * cpqhp_find_available_resources
1161 *
1162 * Finds available memory, IO, and IRQ resources for programming
1163 * devices which may be added to the system
1164 * this function is for hot plug ADD!
1165 *
1166 * returns 0 if success
1167 */
cpqhp_find_available_resources(struct controller * ctrl,void __iomem * rom_start)1168 int cpqhp_find_available_resources(struct controller *ctrl, void __iomem *rom_start)
1169 {
1170 u8 temp;
1171 u8 populated_slot;
1172 u8 bridged_slot;
1173 void __iomem *one_slot;
1174 void __iomem *rom_resource_table;
1175 struct pci_func *func = NULL;
1176 int i = 10, index;
1177 u32 temp_dword, rc;
1178 struct pci_resource *mem_node;
1179 struct pci_resource *p_mem_node;
1180 struct pci_resource *io_node;
1181 struct pci_resource *bus_node;
1182
1183 rom_resource_table = detect_HRT_floating_pointer(rom_start, rom_start+0xffff);
1184 dbg("rom_resource_table = %p\n", rom_resource_table);
1185
1186 if (rom_resource_table == NULL)
1187 return -ENODEV;
1188
1189 /* Sum all resources and setup resource maps */
1190 unused_IRQ = readl(rom_resource_table + UNUSED_IRQ);
1191 dbg("unused_IRQ = %x\n", unused_IRQ);
1192
1193 temp = 0;
1194 while (unused_IRQ) {
1195 if (unused_IRQ & 1) {
1196 cpqhp_disk_irq = temp;
1197 break;
1198 }
1199 unused_IRQ = unused_IRQ >> 1;
1200 temp++;
1201 }
1202
1203 dbg("cpqhp_disk_irq= %d\n", cpqhp_disk_irq);
1204 unused_IRQ = unused_IRQ >> 1;
1205 temp++;
1206
1207 while (unused_IRQ) {
1208 if (unused_IRQ & 1) {
1209 cpqhp_nic_irq = temp;
1210 break;
1211 }
1212 unused_IRQ = unused_IRQ >> 1;
1213 temp++;
1214 }
1215
1216 dbg("cpqhp_nic_irq= %d\n", cpqhp_nic_irq);
1217 unused_IRQ = readl(rom_resource_table + PCIIRQ);
1218
1219 temp = 0;
1220
1221 if (!cpqhp_nic_irq)
1222 cpqhp_nic_irq = ctrl->cfgspc_irq;
1223
1224 if (!cpqhp_disk_irq)
1225 cpqhp_disk_irq = ctrl->cfgspc_irq;
1226
1227 dbg("cpqhp_disk_irq, cpqhp_nic_irq= %d, %d\n", cpqhp_disk_irq, cpqhp_nic_irq);
1228
1229 rc = compaq_nvram_load(rom_start, ctrl);
1230 if (rc)
1231 return rc;
1232
1233 one_slot = rom_resource_table + sizeof(struct hrt);
1234
1235 i = readb(rom_resource_table + NUMBER_OF_ENTRIES);
1236 dbg("number_of_entries = %d\n", i);
1237
1238 if (!readb(one_slot + SECONDARY_BUS))
1239 return 1;
1240
1241 dbg("dev|IO base|length|Mem base|length|Pre base|length|PB SB MB\n");
1242
1243 while (i && readb(one_slot + SECONDARY_BUS)) {
1244 u8 dev_func = readb(one_slot + DEV_FUNC);
1245 u8 primary_bus = readb(one_slot + PRIMARY_BUS);
1246 u8 secondary_bus = readb(one_slot + SECONDARY_BUS);
1247 u8 max_bus = readb(one_slot + MAX_BUS);
1248 u16 io_base = readw(one_slot + IO_BASE);
1249 u16 io_length = readw(one_slot + IO_LENGTH);
1250 u16 mem_base = readw(one_slot + MEM_BASE);
1251 u16 mem_length = readw(one_slot + MEM_LENGTH);
1252 u16 pre_mem_base = readw(one_slot + PRE_MEM_BASE);
1253 u16 pre_mem_length = readw(one_slot + PRE_MEM_LENGTH);
1254
1255 dbg("%2.2x | %4.4x | %4.4x | %4.4x | %4.4x | %4.4x | %4.4x |%2.2x %2.2x %2.2x\n",
1256 dev_func, io_base, io_length, mem_base, mem_length, pre_mem_base, pre_mem_length,
1257 primary_bus, secondary_bus, max_bus);
1258
1259 /* If this entry isn't for our controller's bus, ignore it */
1260 if (primary_bus != ctrl->bus) {
1261 i--;
1262 one_slot += sizeof(struct slot_rt);
1263 continue;
1264 }
1265 /* find out if this entry is for an occupied slot */
1266 ctrl->pci_bus->number = primary_bus;
1267 pci_bus_read_config_dword(ctrl->pci_bus, dev_func, PCI_VENDOR_ID, &temp_dword);
1268 dbg("temp_D_word = %x\n", temp_dword);
1269
1270 if (temp_dword != 0xFFFFFFFF) {
1271 index = 0;
1272 func = cpqhp_slot_find(primary_bus, dev_func >> 3, 0);
1273
1274 while (func && (func->function != (dev_func & 0x07))) {
1275 dbg("func = %p (bus, dev, fun) = (%d, %d, %d)\n", func, primary_bus, dev_func >> 3, index);
1276 func = cpqhp_slot_find(primary_bus, dev_func >> 3, index++);
1277 }
1278
1279 /* If we can't find a match, skip this table entry */
1280 if (!func) {
1281 i--;
1282 one_slot += sizeof(struct slot_rt);
1283 continue;
1284 }
1285 /* this may not work and shouldn't be used */
1286 if (secondary_bus != primary_bus)
1287 bridged_slot = 1;
1288 else
1289 bridged_slot = 0;
1290
1291 populated_slot = 1;
1292 } else {
1293 populated_slot = 0;
1294 bridged_slot = 0;
1295 }
1296
1297
1298 /* If we've got a valid IO base, use it */
1299
1300 temp_dword = io_base + io_length;
1301
1302 if ((io_base) && (temp_dword < 0x10000)) {
1303 io_node = kmalloc(sizeof(*io_node), GFP_KERNEL);
1304 if (!io_node)
1305 return -ENOMEM;
1306
1307 io_node->base = io_base;
1308 io_node->length = io_length;
1309
1310 dbg("found io_node(base, length) = %x, %x\n",
1311 io_node->base, io_node->length);
1312 dbg("populated slot =%d \n", populated_slot);
1313 if (!populated_slot) {
1314 io_node->next = ctrl->io_head;
1315 ctrl->io_head = io_node;
1316 } else {
1317 io_node->next = func->io_head;
1318 func->io_head = io_node;
1319 }
1320 }
1321
1322 /* If we've got a valid memory base, use it */
1323 temp_dword = mem_base + mem_length;
1324 if ((mem_base) && (temp_dword < 0x10000)) {
1325 mem_node = kmalloc(sizeof(*mem_node), GFP_KERNEL);
1326 if (!mem_node)
1327 return -ENOMEM;
1328
1329 mem_node->base = mem_base << 16;
1330
1331 mem_node->length = mem_length << 16;
1332
1333 dbg("found mem_node(base, length) = %x, %x\n",
1334 mem_node->base, mem_node->length);
1335 dbg("populated slot =%d \n", populated_slot);
1336 if (!populated_slot) {
1337 mem_node->next = ctrl->mem_head;
1338 ctrl->mem_head = mem_node;
1339 } else {
1340 mem_node->next = func->mem_head;
1341 func->mem_head = mem_node;
1342 }
1343 }
1344
1345 /* If we've got a valid prefetchable memory base, and
1346 * the base + length isn't greater than 0xFFFF
1347 */
1348 temp_dword = pre_mem_base + pre_mem_length;
1349 if ((pre_mem_base) && (temp_dword < 0x10000)) {
1350 p_mem_node = kmalloc(sizeof(*p_mem_node), GFP_KERNEL);
1351 if (!p_mem_node)
1352 return -ENOMEM;
1353
1354 p_mem_node->base = pre_mem_base << 16;
1355
1356 p_mem_node->length = pre_mem_length << 16;
1357 dbg("found p_mem_node(base, length) = %x, %x\n",
1358 p_mem_node->base, p_mem_node->length);
1359 dbg("populated slot =%d \n", populated_slot);
1360
1361 if (!populated_slot) {
1362 p_mem_node->next = ctrl->p_mem_head;
1363 ctrl->p_mem_head = p_mem_node;
1364 } else {
1365 p_mem_node->next = func->p_mem_head;
1366 func->p_mem_head = p_mem_node;
1367 }
1368 }
1369
1370 /* If we've got a valid bus number, use it
1371 * The second condition is to ignore bus numbers on
1372 * populated slots that don't have PCI-PCI bridges
1373 */
1374 if (secondary_bus && (secondary_bus != primary_bus)) {
1375 bus_node = kmalloc(sizeof(*bus_node), GFP_KERNEL);
1376 if (!bus_node)
1377 return -ENOMEM;
1378
1379 bus_node->base = secondary_bus;
1380 bus_node->length = max_bus - secondary_bus + 1;
1381 dbg("found bus_node(base, length) = %x, %x\n",
1382 bus_node->base, bus_node->length);
1383 dbg("populated slot =%d \n", populated_slot);
1384 if (!populated_slot) {
1385 bus_node->next = ctrl->bus_head;
1386 ctrl->bus_head = bus_node;
1387 } else {
1388 bus_node->next = func->bus_head;
1389 func->bus_head = bus_node;
1390 }
1391 }
1392
1393 i--;
1394 one_slot += sizeof(struct slot_rt);
1395 }
1396
1397 /* If all of the following fail, we don't have any resources for
1398 * hot plug add
1399 */
1400 rc = 1;
1401 rc &= cpqhp_resource_sort_and_combine(&(ctrl->mem_head));
1402 rc &= cpqhp_resource_sort_and_combine(&(ctrl->p_mem_head));
1403 rc &= cpqhp_resource_sort_and_combine(&(ctrl->io_head));
1404 rc &= cpqhp_resource_sort_and_combine(&(ctrl->bus_head));
1405
1406 return rc;
1407 }
1408
1409
1410 /*
1411 * cpqhp_return_board_resources
1412 *
1413 * this routine returns all resources allocated to a board to
1414 * the available pool.
1415 *
1416 * returns 0 if success
1417 */
cpqhp_return_board_resources(struct pci_func * func,struct resource_lists * resources)1418 int cpqhp_return_board_resources(struct pci_func *func, struct resource_lists *resources)
1419 {
1420 int rc = 0;
1421 struct pci_resource *node;
1422 struct pci_resource *t_node;
1423 dbg("%s\n", __func__);
1424
1425 if (!func)
1426 return 1;
1427
1428 node = func->io_head;
1429 func->io_head = NULL;
1430 while (node) {
1431 t_node = node->next;
1432 return_resource(&(resources->io_head), node);
1433 node = t_node;
1434 }
1435
1436 node = func->mem_head;
1437 func->mem_head = NULL;
1438 while (node) {
1439 t_node = node->next;
1440 return_resource(&(resources->mem_head), node);
1441 node = t_node;
1442 }
1443
1444 node = func->p_mem_head;
1445 func->p_mem_head = NULL;
1446 while (node) {
1447 t_node = node->next;
1448 return_resource(&(resources->p_mem_head), node);
1449 node = t_node;
1450 }
1451
1452 node = func->bus_head;
1453 func->bus_head = NULL;
1454 while (node) {
1455 t_node = node->next;
1456 return_resource(&(resources->bus_head), node);
1457 node = t_node;
1458 }
1459
1460 rc |= cpqhp_resource_sort_and_combine(&(resources->mem_head));
1461 rc |= cpqhp_resource_sort_and_combine(&(resources->p_mem_head));
1462 rc |= cpqhp_resource_sort_and_combine(&(resources->io_head));
1463 rc |= cpqhp_resource_sort_and_combine(&(resources->bus_head));
1464
1465 return rc;
1466 }
1467
1468
1469 /*
1470 * cpqhp_destroy_resource_list
1471 *
1472 * Puts node back in the resource list pointed to by head
1473 */
cpqhp_destroy_resource_list(struct resource_lists * resources)1474 void cpqhp_destroy_resource_list(struct resource_lists *resources)
1475 {
1476 struct pci_resource *res, *tres;
1477
1478 res = resources->io_head;
1479 resources->io_head = NULL;
1480
1481 while (res) {
1482 tres = res;
1483 res = res->next;
1484 kfree(tres);
1485 }
1486
1487 res = resources->mem_head;
1488 resources->mem_head = NULL;
1489
1490 while (res) {
1491 tres = res;
1492 res = res->next;
1493 kfree(tres);
1494 }
1495
1496 res = resources->p_mem_head;
1497 resources->p_mem_head = NULL;
1498
1499 while (res) {
1500 tres = res;
1501 res = res->next;
1502 kfree(tres);
1503 }
1504
1505 res = resources->bus_head;
1506 resources->bus_head = NULL;
1507
1508 while (res) {
1509 tres = res;
1510 res = res->next;
1511 kfree(tres);
1512 }
1513 }
1514
1515
1516 /*
1517 * cpqhp_destroy_board_resources
1518 *
1519 * Puts node back in the resource list pointed to by head
1520 */
cpqhp_destroy_board_resources(struct pci_func * func)1521 void cpqhp_destroy_board_resources(struct pci_func *func)
1522 {
1523 struct pci_resource *res, *tres;
1524
1525 res = func->io_head;
1526 func->io_head = NULL;
1527
1528 while (res) {
1529 tres = res;
1530 res = res->next;
1531 kfree(tres);
1532 }
1533
1534 res = func->mem_head;
1535 func->mem_head = NULL;
1536
1537 while (res) {
1538 tres = res;
1539 res = res->next;
1540 kfree(tres);
1541 }
1542
1543 res = func->p_mem_head;
1544 func->p_mem_head = NULL;
1545
1546 while (res) {
1547 tres = res;
1548 res = res->next;
1549 kfree(tres);
1550 }
1551
1552 res = func->bus_head;
1553 func->bus_head = NULL;
1554
1555 while (res) {
1556 tres = res;
1557 res = res->next;
1558 kfree(tres);
1559 }
1560 }
1561