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1da177e4 LT |
1 | /* |
2 | * IBM Hot Plug Controller Driver | |
3 | * | |
4 | * Written By: Irene Zubarev, IBM Corporation | |
5 | * | |
6 | * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) | |
7 | * Copyright (C) 2001,2002 IBM Corp. | |
8 | * | |
9 | * All rights reserved. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or (at | |
14 | * your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, but | |
17 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
19 | * NON INFRINGEMENT. See the GNU General Public License for more | |
20 | * details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * Send feedback to <gregkh@us.ibm.com> | |
27 | * | |
28 | */ | |
29 | ||
30 | #include <linux/module.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/pci.h> | |
33 | #include <linux/list.h> | |
34 | #include <linux/init.h> | |
35 | #include "ibmphp.h" | |
36 | ||
37 | static int flags = 0; /* for testing */ | |
38 | ||
39 | static void update_resources (struct bus_node *bus_cur, int type, int rangeno); | |
40 | static int once_over (void); | |
41 | static int remove_ranges (struct bus_node *, struct bus_node *); | |
42 | static int update_bridge_ranges (struct bus_node **); | |
c85e4aae | 43 | static int add_bus_range (int type, struct range_node *, struct bus_node *); |
1da177e4 LT |
44 | static void fix_resources (struct bus_node *); |
45 | static struct bus_node *find_bus_wprev (u8, struct bus_node **, u8); | |
46 | ||
47 | static LIST_HEAD(gbuses); | |
48 | ||
49 | static struct bus_node * __init alloc_error_bus (struct ebda_pci_rsrc * curr, u8 busno, int flag) | |
50 | { | |
51 | struct bus_node * newbus; | |
52 | ||
53 | if (!(curr) && !(flag)) { | |
54 | err ("NULL pointer passed\n"); | |
55 | return NULL; | |
56 | } | |
57 | ||
f5afe806 | 58 | newbus = kzalloc(sizeof(struct bus_node), GFP_KERNEL); |
1da177e4 LT |
59 | if (!newbus) { |
60 | err ("out of system memory\n"); | |
61 | return NULL; | |
62 | } | |
63 | ||
1da177e4 LT |
64 | if (flag) |
65 | newbus->busno = busno; | |
66 | else | |
67 | newbus->busno = curr->bus_num; | |
68 | list_add_tail (&newbus->bus_list, &gbuses); | |
69 | return newbus; | |
70 | } | |
71 | ||
72 | static struct resource_node * __init alloc_resources (struct ebda_pci_rsrc * curr) | |
73 | { | |
74 | struct resource_node *rs; | |
75 | ||
76 | if (!curr) { | |
77 | err ("NULL passed to allocate\n"); | |
78 | return NULL; | |
79 | } | |
80 | ||
f5afe806 | 81 | rs = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
1da177e4 LT |
82 | if (!rs) { |
83 | err ("out of system memory\n"); | |
84 | return NULL; | |
85 | } | |
1da177e4 LT |
86 | rs->busno = curr->bus_num; |
87 | rs->devfunc = curr->dev_fun; | |
88 | rs->start = curr->start_addr; | |
89 | rs->end = curr->end_addr; | |
90 | rs->len = curr->end_addr - curr->start_addr + 1; | |
91 | return rs; | |
92 | } | |
93 | ||
94 | static int __init alloc_bus_range (struct bus_node **new_bus, struct range_node **new_range, struct ebda_pci_rsrc *curr, int flag, u8 first_bus) | |
95 | { | |
96 | struct bus_node * newbus; | |
97 | struct range_node *newrange; | |
98 | u8 num_ranges = 0; | |
99 | ||
100 | if (first_bus) { | |
f5afe806 | 101 | newbus = kzalloc(sizeof(struct bus_node), GFP_KERNEL); |
1da177e4 LT |
102 | if (!newbus) { |
103 | err ("out of system memory.\n"); | |
104 | return -ENOMEM; | |
105 | } | |
1da177e4 LT |
106 | newbus->busno = curr->bus_num; |
107 | } else { | |
108 | newbus = *new_bus; | |
109 | switch (flag) { | |
110 | case MEM: | |
111 | num_ranges = newbus->noMemRanges; | |
112 | break; | |
113 | case PFMEM: | |
114 | num_ranges = newbus->noPFMemRanges; | |
115 | break; | |
116 | case IO: | |
117 | num_ranges = newbus->noIORanges; | |
118 | break; | |
119 | } | |
120 | } | |
121 | ||
f5afe806 | 122 | newrange = kzalloc(sizeof(struct range_node), GFP_KERNEL); |
1da177e4 LT |
123 | if (!newrange) { |
124 | if (first_bus) | |
125 | kfree (newbus); | |
126 | err ("out of system memory\n"); | |
127 | return -ENOMEM; | |
128 | } | |
1da177e4 LT |
129 | newrange->start = curr->start_addr; |
130 | newrange->end = curr->end_addr; | |
131 | ||
132 | if (first_bus || (!num_ranges)) | |
133 | newrange->rangeno = 1; | |
134 | else { | |
135 | /* need to insert our range */ | |
c85e4aae | 136 | add_bus_range (flag, newrange, newbus); |
1da177e4 LT |
137 | debug ("%d resource Primary Bus inserted on bus %x [%x - %x]\n", flag, newbus->busno, newrange->start, newrange->end); |
138 | } | |
139 | ||
140 | switch (flag) { | |
141 | case MEM: | |
142 | newbus->rangeMem = newrange; | |
143 | if (first_bus) | |
144 | newbus->noMemRanges = 1; | |
145 | else { | |
146 | debug ("First Memory Primary on bus %x, [%x - %x]\n", newbus->busno, newrange->start, newrange->end); | |
147 | ++newbus->noMemRanges; | |
148 | fix_resources (newbus); | |
149 | } | |
150 | break; | |
151 | case IO: | |
152 | newbus->rangeIO = newrange; | |
153 | if (first_bus) | |
154 | newbus->noIORanges = 1; | |
155 | else { | |
156 | debug ("First IO Primary on bus %x, [%x - %x]\n", newbus->busno, newrange->start, newrange->end); | |
157 | ++newbus->noIORanges; | |
158 | fix_resources (newbus); | |
159 | } | |
160 | break; | |
161 | case PFMEM: | |
162 | newbus->rangePFMem = newrange; | |
163 | if (first_bus) | |
164 | newbus->noPFMemRanges = 1; | |
165 | else { | |
166 | debug ("1st PFMemory Primary on Bus %x [%x - %x]\n", newbus->busno, newrange->start, newrange->end); | |
167 | ++newbus->noPFMemRanges; | |
168 | fix_resources (newbus); | |
169 | } | |
170 | ||
171 | break; | |
172 | } | |
173 | ||
174 | *new_bus = newbus; | |
175 | *new_range = newrange; | |
176 | return 0; | |
177 | } | |
178 | ||
179 | ||
180 | /* Notes: | |
181 | * 1. The ranges are ordered. The buses are not ordered. (First come) | |
182 | * | |
183 | * 2. If cannot allocate out of PFMem range, allocate from Mem ranges. PFmemFromMem | |
184 | * are not sorted. (no need since use mem node). To not change the entire code, we | |
185 | * also add mem node whenever this case happens so as not to change | |
186 | * ibmphp_check_mem_resource etc (and since it really is taking Mem resource) | |
187 | */ | |
188 | ||
189 | /***************************************************************************** | |
190 | * This is the Resource Management initialization function. It will go through | |
191 | * the Resource list taken from EBDA and fill in this module's data structures | |
192 | * | |
193 | * THIS IS NOT TAKING INTO CONSIDERATION IO RESTRICTIONS OF PRIMARY BUSES, | |
194 | * SINCE WE'RE GOING TO ASSUME FOR NOW WE DON'T HAVE THOSE ON OUR BUSES FOR NOW | |
195 | * | |
196 | * Input: ptr to the head of the resource list from EBDA | |
197 | * Output: 0, -1 or error codes | |
198 | ***************************************************************************/ | |
199 | int __init ibmphp_rsrc_init (void) | |
200 | { | |
201 | struct ebda_pci_rsrc *curr; | |
202 | struct range_node *newrange = NULL; | |
203 | struct bus_node *newbus = NULL; | |
204 | struct bus_node *bus_cur; | |
205 | struct bus_node *bus_prev; | |
206 | struct list_head *tmp; | |
207 | struct resource_node *new_io = NULL; | |
208 | struct resource_node *new_mem = NULL; | |
209 | struct resource_node *new_pfmem = NULL; | |
210 | int rc; | |
211 | struct list_head *tmp_ebda; | |
212 | ||
213 | list_for_each (tmp_ebda, &ibmphp_ebda_pci_rsrc_head) { | |
214 | curr = list_entry (tmp_ebda, struct ebda_pci_rsrc, ebda_pci_rsrc_list); | |
215 | if (!(curr->rsrc_type & PCIDEVMASK)) { | |
216 | /* EBDA still lists non PCI devices, so ignore... */ | |
217 | debug ("this is not a PCI DEVICE in rsrc_init, please take care\n"); | |
218 | // continue; | |
219 | } | |
220 | ||
221 | /* this is a primary bus resource */ | |
222 | if (curr->rsrc_type & PRIMARYBUSMASK) { | |
223 | /* memory */ | |
224 | if ((curr->rsrc_type & RESTYPE) == MMASK) { | |
225 | /* no bus structure exists in place yet */ | |
226 | if (list_empty (&gbuses)) { | |
227 | if ((rc = alloc_bus_range (&newbus, &newrange, curr, MEM, 1))) | |
228 | return rc; | |
229 | list_add_tail (&newbus->bus_list, &gbuses); | |
230 | debug ("gbuses = NULL, Memory Primary Bus %x [%x - %x]\n", newbus->busno, newrange->start, newrange->end); | |
231 | } else { | |
232 | bus_cur = find_bus_wprev (curr->bus_num, &bus_prev, 1); | |
233 | /* found our bus */ | |
234 | if (bus_cur) { | |
235 | rc = alloc_bus_range (&bus_cur, &newrange, curr, MEM, 0); | |
236 | if (rc) | |
237 | return rc; | |
238 | } else { | |
239 | /* went through all the buses and didn't find ours, need to create a new bus node */ | |
240 | if ((rc = alloc_bus_range (&newbus, &newrange, curr, MEM, 1))) | |
241 | return rc; | |
242 | ||
243 | list_add_tail (&newbus->bus_list, &gbuses); | |
244 | debug ("New Bus, Memory Primary Bus %x [%x - %x]\n", newbus->busno, newrange->start, newrange->end); | |
245 | } | |
246 | } | |
247 | } else if ((curr->rsrc_type & RESTYPE) == PFMASK) { | |
248 | /* prefetchable memory */ | |
249 | if (list_empty (&gbuses)) { | |
250 | /* no bus structure exists in place yet */ | |
251 | if ((rc = alloc_bus_range (&newbus, &newrange, curr, PFMEM, 1))) | |
252 | return rc; | |
253 | list_add_tail (&newbus->bus_list, &gbuses); | |
254 | debug ("gbuses = NULL, PFMemory Primary Bus %x [%x - %x]\n", newbus->busno, newrange->start, newrange->end); | |
255 | } else { | |
256 | bus_cur = find_bus_wprev (curr->bus_num, &bus_prev, 1); | |
257 | if (bus_cur) { | |
258 | /* found our bus */ | |
259 | rc = alloc_bus_range (&bus_cur, &newrange, curr, PFMEM, 0); | |
260 | if (rc) | |
261 | return rc; | |
262 | } else { | |
263 | /* went through all the buses and didn't find ours, need to create a new bus node */ | |
264 | if ((rc = alloc_bus_range (&newbus, &newrange, curr, PFMEM, 1))) | |
265 | return rc; | |
266 | list_add_tail (&newbus->bus_list, &gbuses); | |
267 | debug ("1st Bus, PFMemory Primary Bus %x [%x - %x]\n", newbus->busno, newrange->start, newrange->end); | |
268 | } | |
269 | } | |
270 | } else if ((curr->rsrc_type & RESTYPE) == IOMASK) { | |
271 | /* IO */ | |
272 | if (list_empty (&gbuses)) { | |
273 | /* no bus structure exists in place yet */ | |
274 | if ((rc = alloc_bus_range (&newbus, &newrange, curr, IO, 1))) | |
275 | return rc; | |
276 | list_add_tail (&newbus->bus_list, &gbuses); | |
277 | debug ("gbuses = NULL, IO Primary Bus %x [%x - %x]\n", newbus->busno, newrange->start, newrange->end); | |
278 | } else { | |
279 | bus_cur = find_bus_wprev (curr->bus_num, &bus_prev, 1); | |
280 | if (bus_cur) { | |
281 | rc = alloc_bus_range (&bus_cur, &newrange, curr, IO, 0); | |
282 | if (rc) | |
283 | return rc; | |
284 | } else { | |
285 | /* went through all the buses and didn't find ours, need to create a new bus node */ | |
286 | if ((rc = alloc_bus_range (&newbus, &newrange, curr, IO, 1))) | |
287 | return rc; | |
288 | list_add_tail (&newbus->bus_list, &gbuses); | |
289 | debug ("1st Bus, IO Primary Bus %x [%x - %x]\n", newbus->busno, newrange->start, newrange->end); | |
290 | } | |
291 | } | |
292 | ||
293 | } else { | |
294 | ; /* type is reserved WHAT TO DO IN THIS CASE??? | |
295 | NOTHING TO DO??? */ | |
296 | } | |
297 | } else { | |
298 | /* regular pci device resource */ | |
299 | if ((curr->rsrc_type & RESTYPE) == MMASK) { | |
300 | /* Memory resource */ | |
301 | new_mem = alloc_resources (curr); | |
302 | if (!new_mem) | |
303 | return -ENOMEM; | |
304 | new_mem->type = MEM; | |
305 | /* | |
306 | * if it didn't find the bus, means PCI dev | |
307 | * came b4 the Primary Bus info, so need to | |
308 | * create a bus rangeno becomes a problem... | |
309 | * assign a -1 and then update once the range | |
310 | * actually appears... | |
311 | */ | |
312 | if (ibmphp_add_resource (new_mem) < 0) { | |
313 | newbus = alloc_error_bus (curr, 0, 0); | |
314 | if (!newbus) | |
315 | return -ENOMEM; | |
316 | newbus->firstMem = new_mem; | |
317 | ++newbus->needMemUpdate; | |
318 | new_mem->rangeno = -1; | |
319 | } | |
320 | debug ("Memory resource for device %x, bus %x, [%x - %x]\n", new_mem->devfunc, new_mem->busno, new_mem->start, new_mem->end); | |
321 | ||
322 | } else if ((curr->rsrc_type & RESTYPE) == PFMASK) { | |
323 | /* PFMemory resource */ | |
324 | new_pfmem = alloc_resources (curr); | |
325 | if (!new_pfmem) | |
326 | return -ENOMEM; | |
327 | new_pfmem->type = PFMEM; | |
dc6712d1 | 328 | new_pfmem->fromMem = 0; |
1da177e4 LT |
329 | if (ibmphp_add_resource (new_pfmem) < 0) { |
330 | newbus = alloc_error_bus (curr, 0, 0); | |
331 | if (!newbus) | |
332 | return -ENOMEM; | |
333 | newbus->firstPFMem = new_pfmem; | |
334 | ++newbus->needPFMemUpdate; | |
335 | new_pfmem->rangeno = -1; | |
336 | } | |
337 | ||
338 | debug ("PFMemory resource for device %x, bus %x, [%x - %x]\n", new_pfmem->devfunc, new_pfmem->busno, new_pfmem->start, new_pfmem->end); | |
339 | } else if ((curr->rsrc_type & RESTYPE) == IOMASK) { | |
340 | /* IO resource */ | |
341 | new_io = alloc_resources (curr); | |
342 | if (!new_io) | |
343 | return -ENOMEM; | |
344 | new_io->type = IO; | |
345 | ||
346 | /* | |
347 | * if it didn't find the bus, means PCI dev | |
348 | * came b4 the Primary Bus info, so need to | |
349 | * create a bus rangeno becomes a problem... | |
350 | * Can assign a -1 and then update once the | |
351 | * range actually appears... | |
352 | */ | |
353 | if (ibmphp_add_resource (new_io) < 0) { | |
354 | newbus = alloc_error_bus (curr, 0, 0); | |
355 | if (!newbus) | |
356 | return -ENOMEM; | |
357 | newbus->firstIO = new_io; | |
358 | ++newbus->needIOUpdate; | |
359 | new_io->rangeno = -1; | |
360 | } | |
361 | debug ("IO resource for device %x, bus %x, [%x - %x]\n", new_io->devfunc, new_io->busno, new_io->start, new_io->end); | |
362 | } | |
363 | } | |
364 | } | |
365 | ||
366 | list_for_each (tmp, &gbuses) { | |
367 | bus_cur = list_entry (tmp, struct bus_node, bus_list); | |
368 | /* This is to get info about PPB resources, since EBDA doesn't put this info into the primary bus info */ | |
369 | rc = update_bridge_ranges (&bus_cur); | |
370 | if (rc) | |
371 | return rc; | |
372 | } | |
373 | rc = once_over (); /* This is to align ranges (so no -1) */ | |
374 | if (rc) | |
375 | return rc; | |
376 | return 0; | |
377 | } | |
378 | ||
379 | /******************************************************************************** | |
380 | * This function adds a range into a sorted list of ranges per bus for a particular | |
381 | * range type, it then calls another routine to update the range numbers on the | |
382 | * pci devices' resources for the appropriate resource | |
383 | * | |
384 | * Input: type of the resource, range to add, current bus | |
385 | * Output: 0 or -1, bus and range ptrs | |
386 | ********************************************************************************/ | |
c85e4aae | 387 | static int add_bus_range (int type, struct range_node *range, struct bus_node *bus_cur) |
1da177e4 LT |
388 | { |
389 | struct range_node *range_cur = NULL; | |
390 | struct range_node *range_prev; | |
391 | int count = 0, i_init; | |
392 | int noRanges = 0; | |
393 | ||
394 | switch (type) { | |
395 | case MEM: | |
396 | range_cur = bus_cur->rangeMem; | |
397 | noRanges = bus_cur->noMemRanges; | |
398 | break; | |
399 | case PFMEM: | |
400 | range_cur = bus_cur->rangePFMem; | |
401 | noRanges = bus_cur->noPFMemRanges; | |
402 | break; | |
403 | case IO: | |
404 | range_cur = bus_cur->rangeIO; | |
405 | noRanges = bus_cur->noIORanges; | |
406 | break; | |
407 | } | |
408 | ||
409 | range_prev = NULL; | |
410 | while (range_cur) { | |
411 | if (range->start < range_cur->start) | |
412 | break; | |
413 | range_prev = range_cur; | |
414 | range_cur = range_cur->next; | |
415 | count = count + 1; | |
416 | } | |
417 | if (!count) { | |
418 | /* our range will go at the beginning of the list */ | |
419 | switch (type) { | |
420 | case MEM: | |
421 | bus_cur->rangeMem = range; | |
422 | break; | |
423 | case PFMEM: | |
424 | bus_cur->rangePFMem = range; | |
425 | break; | |
426 | case IO: | |
427 | bus_cur->rangeIO = range; | |
428 | break; | |
429 | } | |
430 | range->next = range_cur; | |
431 | range->rangeno = 1; | |
432 | i_init = 0; | |
433 | } else if (!range_cur) { | |
434 | /* our range will go at the end of the list */ | |
435 | range->next = NULL; | |
436 | range_prev->next = range; | |
437 | range->rangeno = range_prev->rangeno + 1; | |
438 | return 0; | |
439 | } else { | |
440 | /* the range is in the middle */ | |
441 | range_prev->next = range; | |
442 | range->next = range_cur; | |
443 | range->rangeno = range_cur->rangeno; | |
444 | i_init = range_prev->rangeno; | |
445 | } | |
446 | ||
447 | for (count = i_init; count < noRanges; ++count) { | |
448 | ++range_cur->rangeno; | |
449 | range_cur = range_cur->next; | |
450 | } | |
451 | ||
452 | update_resources (bus_cur, type, i_init + 1); | |
453 | return 0; | |
454 | } | |
455 | ||
456 | /******************************************************************************* | |
457 | * This routine goes through the list of resources of type 'type' and updates | |
c85e4aae | 458 | * the range numbers that they correspond to. It was called from add_bus_range fnc |
1da177e4 LT |
459 | * |
460 | * Input: bus, type of the resource, the rangeno starting from which to update | |
461 | ******************************************************************************/ | |
462 | static void update_resources (struct bus_node *bus_cur, int type, int rangeno) | |
463 | { | |
464 | struct resource_node *res = NULL; | |
dc6712d1 | 465 | u8 eol = 0; /* end of list indicator */ |
1da177e4 LT |
466 | |
467 | switch (type) { | |
468 | case MEM: | |
469 | if (bus_cur->firstMem) | |
470 | res = bus_cur->firstMem; | |
471 | break; | |
472 | case PFMEM: | |
473 | if (bus_cur->firstPFMem) | |
474 | res = bus_cur->firstPFMem; | |
475 | break; | |
476 | case IO: | |
477 | if (bus_cur->firstIO) | |
478 | res = bus_cur->firstIO; | |
479 | break; | |
480 | } | |
481 | ||
482 | if (res) { | |
483 | while (res) { | |
484 | if (res->rangeno == rangeno) | |
485 | break; | |
486 | if (res->next) | |
487 | res = res->next; | |
488 | else if (res->nextRange) | |
489 | res = res->nextRange; | |
490 | else { | |
dc6712d1 | 491 | eol = 1; |
1da177e4 LT |
492 | break; |
493 | } | |
494 | } | |
495 | ||
496 | if (!eol) { | |
497 | /* found the range */ | |
498 | while (res) { | |
499 | ++res->rangeno; | |
500 | res = res->next; | |
501 | } | |
502 | } | |
503 | } | |
504 | } | |
505 | ||
506 | static void fix_me (struct resource_node *res, struct bus_node *bus_cur, struct range_node *range) | |
507 | { | |
508 | char * str = ""; | |
509 | switch (res->type) { | |
510 | case IO: | |
511 | str = "io"; | |
512 | break; | |
513 | case MEM: | |
514 | str = "mem"; | |
515 | break; | |
516 | case PFMEM: | |
517 | str = "pfmem"; | |
518 | break; | |
519 | } | |
520 | ||
521 | while (res) { | |
522 | if (res->rangeno == -1) { | |
523 | while (range) { | |
524 | if ((res->start >= range->start) && (res->end <= range->end)) { | |
525 | res->rangeno = range->rangeno; | |
526 | debug ("%s->rangeno in fix_resources is %d\n", str, res->rangeno); | |
527 | switch (res->type) { | |
528 | case IO: | |
529 | --bus_cur->needIOUpdate; | |
530 | break; | |
531 | case MEM: | |
532 | --bus_cur->needMemUpdate; | |
533 | break; | |
534 | case PFMEM: | |
535 | --bus_cur->needPFMemUpdate; | |
536 | break; | |
537 | } | |
538 | break; | |
539 | } | |
540 | range = range->next; | |
541 | } | |
542 | } | |
543 | if (res->next) | |
544 | res = res->next; | |
545 | else | |
546 | res = res->nextRange; | |
547 | } | |
548 | ||
549 | } | |
550 | ||
551 | /***************************************************************************** | |
552 | * This routine reassigns the range numbers to the resources that had a -1 | |
553 | * This case can happen only if upon initialization, resources taken by pci dev | |
554 | * appear in EBDA before the resources allocated for that bus, since we don't | |
555 | * know the range, we assign -1, and this routine is called after a new range | |
556 | * is assigned to see the resources with unknown range belong to the added range | |
557 | * | |
558 | * Input: current bus | |
559 | * Output: none, list of resources for that bus are fixed if can be | |
560 | *******************************************************************************/ | |
561 | static void fix_resources (struct bus_node *bus_cur) | |
562 | { | |
563 | struct range_node *range; | |
564 | struct resource_node *res; | |
565 | ||
66bef8c0 | 566 | debug ("%s - bus_cur->busno = %d\n", __func__, bus_cur->busno); |
1da177e4 LT |
567 | |
568 | if (bus_cur->needIOUpdate) { | |
569 | res = bus_cur->firstIO; | |
570 | range = bus_cur->rangeIO; | |
571 | fix_me (res, bus_cur, range); | |
572 | } | |
573 | if (bus_cur->needMemUpdate) { | |
574 | res = bus_cur->firstMem; | |
575 | range = bus_cur->rangeMem; | |
576 | fix_me (res, bus_cur, range); | |
577 | } | |
578 | if (bus_cur->needPFMemUpdate) { | |
579 | res = bus_cur->firstPFMem; | |
580 | range = bus_cur->rangePFMem; | |
581 | fix_me (res, bus_cur, range); | |
582 | } | |
583 | } | |
584 | ||
585 | /******************************************************************************* | |
586 | * This routine adds a resource to the list of resources to the appropriate bus | |
587 | * based on their resource type and sorted by their starting addresses. It assigns | |
588 | * the ptrs to next and nextRange if needed. | |
589 | * | |
590 | * Input: resource ptr | |
591 | * Output: ptrs assigned (to the node) | |
592 | * 0 or -1 | |
593 | *******************************************************************************/ | |
594 | int ibmphp_add_resource (struct resource_node *res) | |
595 | { | |
596 | struct resource_node *res_cur; | |
597 | struct resource_node *res_prev; | |
598 | struct bus_node *bus_cur; | |
599 | struct range_node *range_cur = NULL; | |
600 | struct resource_node *res_start = NULL; | |
601 | ||
66bef8c0 | 602 | debug ("%s - enter\n", __func__); |
1da177e4 LT |
603 | |
604 | if (!res) { | |
605 | err ("NULL passed to add\n"); | |
606 | return -ENODEV; | |
607 | } | |
608 | ||
609 | bus_cur = find_bus_wprev (res->busno, NULL, 0); | |
610 | ||
611 | if (!bus_cur) { | |
612 | /* didn't find a bus, smth's wrong!!! */ | |
613 | debug ("no bus in the system, either pci_dev's wrong or allocation failed\n"); | |
614 | return -ENODEV; | |
615 | } | |
616 | ||
617 | /* Normal case */ | |
618 | switch (res->type) { | |
619 | case IO: | |
620 | range_cur = bus_cur->rangeIO; | |
621 | res_start = bus_cur->firstIO; | |
622 | break; | |
623 | case MEM: | |
624 | range_cur = bus_cur->rangeMem; | |
625 | res_start = bus_cur->firstMem; | |
626 | break; | |
627 | case PFMEM: | |
628 | range_cur = bus_cur->rangePFMem; | |
629 | res_start = bus_cur->firstPFMem; | |
630 | break; | |
631 | default: | |
632 | err ("cannot read the type of the resource to add... problem\n"); | |
633 | return -EINVAL; | |
634 | } | |
635 | while (range_cur) { | |
636 | if ((res->start >= range_cur->start) && (res->end <= range_cur->end)) { | |
637 | res->rangeno = range_cur->rangeno; | |
638 | break; | |
639 | } | |
640 | range_cur = range_cur->next; | |
641 | } | |
642 | ||
643 | /* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! | |
644 | * this is again the case of rangeno = -1 | |
645 | * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! | |
646 | */ | |
647 | ||
648 | if (!range_cur) { | |
649 | switch (res->type) { | |
650 | case IO: | |
651 | ++bus_cur->needIOUpdate; | |
652 | break; | |
653 | case MEM: | |
654 | ++bus_cur->needMemUpdate; | |
655 | break; | |
656 | case PFMEM: | |
657 | ++bus_cur->needPFMemUpdate; | |
658 | break; | |
659 | } | |
660 | res->rangeno = -1; | |
661 | } | |
662 | ||
663 | debug ("The range is %d\n", res->rangeno); | |
664 | if (!res_start) { | |
665 | /* no first{IO,Mem,Pfmem} on the bus, 1st IO/Mem/Pfmem resource ever */ | |
666 | switch (res->type) { | |
667 | case IO: | |
668 | bus_cur->firstIO = res; | |
669 | break; | |
670 | case MEM: | |
671 | bus_cur->firstMem = res; | |
672 | break; | |
673 | case PFMEM: | |
674 | bus_cur->firstPFMem = res; | |
675 | break; | |
676 | } | |
677 | res->next = NULL; | |
678 | res->nextRange = NULL; | |
679 | } else { | |
680 | res_cur = res_start; | |
681 | res_prev = NULL; | |
682 | ||
683 | debug ("res_cur->rangeno is %d\n", res_cur->rangeno); | |
684 | ||
685 | while (res_cur) { | |
686 | if (res_cur->rangeno >= res->rangeno) | |
687 | break; | |
688 | res_prev = res_cur; | |
689 | if (res_cur->next) | |
690 | res_cur = res_cur->next; | |
691 | else | |
692 | res_cur = res_cur->nextRange; | |
693 | } | |
694 | ||
695 | if (!res_cur) { | |
696 | /* at the end of the resource list */ | |
697 | debug ("i should be here, [%x - %x]\n", res->start, res->end); | |
698 | res_prev->nextRange = res; | |
699 | res->next = NULL; | |
700 | res->nextRange = NULL; | |
701 | } else if (res_cur->rangeno == res->rangeno) { | |
702 | /* in the same range */ | |
703 | while (res_cur) { | |
704 | if (res->start < res_cur->start) | |
705 | break; | |
706 | res_prev = res_cur; | |
707 | res_cur = res_cur->next; | |
708 | } | |
709 | if (!res_cur) { | |
710 | /* the last resource in this range */ | |
711 | res_prev->next = res; | |
712 | res->next = NULL; | |
713 | res->nextRange = res_prev->nextRange; | |
714 | res_prev->nextRange = NULL; | |
715 | } else if (res->start < res_cur->start) { | |
716 | /* at the beginning or middle of the range */ | |
717 | if (!res_prev) { | |
718 | switch (res->type) { | |
719 | case IO: | |
720 | bus_cur->firstIO = res; | |
721 | break; | |
722 | case MEM: | |
723 | bus_cur->firstMem = res; | |
724 | break; | |
725 | case PFMEM: | |
726 | bus_cur->firstPFMem = res; | |
727 | break; | |
728 | } | |
729 | } else if (res_prev->rangeno == res_cur->rangeno) | |
730 | res_prev->next = res; | |
731 | else | |
732 | res_prev->nextRange = res; | |
733 | ||
734 | res->next = res_cur; | |
735 | res->nextRange = NULL; | |
736 | } | |
737 | } else { | |
738 | /* this is the case where it is 1st occurrence of the range */ | |
739 | if (!res_prev) { | |
740 | /* at the beginning of the resource list */ | |
741 | res->next = NULL; | |
742 | switch (res->type) { | |
743 | case IO: | |
744 | res->nextRange = bus_cur->firstIO; | |
745 | bus_cur->firstIO = res; | |
746 | break; | |
747 | case MEM: | |
748 | res->nextRange = bus_cur->firstMem; | |
749 | bus_cur->firstMem = res; | |
750 | break; | |
751 | case PFMEM: | |
752 | res->nextRange = bus_cur->firstPFMem; | |
753 | bus_cur->firstPFMem = res; | |
754 | break; | |
755 | } | |
756 | } else if (res_cur->rangeno > res->rangeno) { | |
757 | /* in the middle of the resource list */ | |
758 | res_prev->nextRange = res; | |
759 | res->next = NULL; | |
760 | res->nextRange = res_cur; | |
761 | } | |
762 | } | |
763 | } | |
764 | ||
66bef8c0 | 765 | debug ("%s - exit\n", __func__); |
1da177e4 LT |
766 | return 0; |
767 | } | |
768 | ||
769 | /**************************************************************************** | |
770 | * This routine will remove the resource from the list of resources | |
771 | * | |
772 | * Input: io, mem, and/or pfmem resource to be deleted | |
773 | * Ouput: modified resource list | |
774 | * 0 or error code | |
775 | ****************************************************************************/ | |
776 | int ibmphp_remove_resource (struct resource_node *res) | |
777 | { | |
778 | struct bus_node *bus_cur; | |
779 | struct resource_node *res_cur = NULL; | |
780 | struct resource_node *res_prev; | |
781 | struct resource_node *mem_cur; | |
782 | char * type = ""; | |
783 | ||
784 | if (!res) { | |
785 | err ("resource to remove is NULL\n"); | |
786 | return -ENODEV; | |
787 | } | |
788 | ||
789 | bus_cur = find_bus_wprev (res->busno, NULL, 0); | |
790 | ||
791 | if (!bus_cur) { | |
792 | err ("cannot find corresponding bus of the io resource to remove " | |
793 | "bailing out...\n"); | |
794 | return -ENODEV; | |
795 | } | |
796 | ||
797 | switch (res->type) { | |
798 | case IO: | |
799 | res_cur = bus_cur->firstIO; | |
800 | type = "io"; | |
801 | break; | |
802 | case MEM: | |
803 | res_cur = bus_cur->firstMem; | |
804 | type = "mem"; | |
805 | break; | |
806 | case PFMEM: | |
807 | res_cur = bus_cur->firstPFMem; | |
808 | type = "pfmem"; | |
809 | break; | |
810 | default: | |
811 | err ("unknown type for resource to remove\n"); | |
812 | return -EINVAL; | |
813 | } | |
814 | res_prev = NULL; | |
815 | ||
816 | while (res_cur) { | |
817 | if ((res_cur->start == res->start) && (res_cur->end == res->end)) | |
818 | break; | |
819 | res_prev = res_cur; | |
820 | if (res_cur->next) | |
821 | res_cur = res_cur->next; | |
822 | else | |
823 | res_cur = res_cur->nextRange; | |
824 | } | |
825 | ||
826 | if (!res_cur) { | |
827 | if (res->type == PFMEM) { | |
828 | /* | |
829 | * case where pfmem might be in the PFMemFromMem list | |
830 | * so will also need to remove the corresponding mem | |
831 | * entry | |
832 | */ | |
833 | res_cur = bus_cur->firstPFMemFromMem; | |
834 | res_prev = NULL; | |
835 | ||
836 | while (res_cur) { | |
837 | if ((res_cur->start == res->start) && (res_cur->end == res->end)) { | |
838 | mem_cur = bus_cur->firstMem; | |
839 | while (mem_cur) { | |
840 | if ((mem_cur->start == res_cur->start) | |
841 | && (mem_cur->end == res_cur->end)) | |
842 | break; | |
843 | if (mem_cur->next) | |
844 | mem_cur = mem_cur->next; | |
845 | else | |
846 | mem_cur = mem_cur->nextRange; | |
847 | } | |
848 | if (!mem_cur) { | |
849 | err ("cannot find corresponding mem node for pfmem...\n"); | |
850 | return -EINVAL; | |
851 | } | |
852 | ||
853 | ibmphp_remove_resource (mem_cur); | |
854 | if (!res_prev) | |
855 | bus_cur->firstPFMemFromMem = res_cur->next; | |
856 | else | |
857 | res_prev->next = res_cur->next; | |
858 | kfree (res_cur); | |
859 | return 0; | |
860 | } | |
861 | res_prev = res_cur; | |
862 | if (res_cur->next) | |
863 | res_cur = res_cur->next; | |
864 | else | |
865 | res_cur = res_cur->nextRange; | |
866 | } | |
867 | if (!res_cur) { | |
868 | err ("cannot find pfmem to delete...\n"); | |
869 | return -EINVAL; | |
870 | } | |
871 | } else { | |
872 | err ("the %s resource is not in the list to be deleted...\n", type); | |
873 | return -EINVAL; | |
874 | } | |
875 | } | |
876 | if (!res_prev) { | |
877 | /* first device to be deleted */ | |
878 | if (res_cur->next) { | |
879 | switch (res->type) { | |
880 | case IO: | |
881 | bus_cur->firstIO = res_cur->next; | |
882 | break; | |
883 | case MEM: | |
884 | bus_cur->firstMem = res_cur->next; | |
885 | break; | |
886 | case PFMEM: | |
887 | bus_cur->firstPFMem = res_cur->next; | |
888 | break; | |
889 | } | |
890 | } else if (res_cur->nextRange) { | |
891 | switch (res->type) { | |
892 | case IO: | |
893 | bus_cur->firstIO = res_cur->nextRange; | |
894 | break; | |
895 | case MEM: | |
896 | bus_cur->firstMem = res_cur->nextRange; | |
897 | break; | |
898 | case PFMEM: | |
899 | bus_cur->firstPFMem = res_cur->nextRange; | |
900 | break; | |
901 | } | |
902 | } else { | |
903 | switch (res->type) { | |
904 | case IO: | |
905 | bus_cur->firstIO = NULL; | |
906 | break; | |
907 | case MEM: | |
908 | bus_cur->firstMem = NULL; | |
909 | break; | |
910 | case PFMEM: | |
911 | bus_cur->firstPFMem = NULL; | |
912 | break; | |
913 | } | |
914 | } | |
915 | kfree (res_cur); | |
916 | return 0; | |
917 | } else { | |
918 | if (res_cur->next) { | |
919 | if (res_prev->rangeno == res_cur->rangeno) | |
920 | res_prev->next = res_cur->next; | |
921 | else | |
922 | res_prev->nextRange = res_cur->next; | |
923 | } else if (res_cur->nextRange) { | |
924 | res_prev->next = NULL; | |
925 | res_prev->nextRange = res_cur->nextRange; | |
926 | } else { | |
927 | res_prev->next = NULL; | |
928 | res_prev->nextRange = NULL; | |
929 | } | |
930 | kfree (res_cur); | |
931 | return 0; | |
932 | } | |
933 | ||
934 | return 0; | |
935 | } | |
936 | ||
937 | static struct range_node * find_range (struct bus_node *bus_cur, struct resource_node * res) | |
938 | { | |
939 | struct range_node * range = NULL; | |
940 | ||
941 | switch (res->type) { | |
942 | case IO: | |
943 | range = bus_cur->rangeIO; | |
944 | break; | |
945 | case MEM: | |
946 | range = bus_cur->rangeMem; | |
947 | break; | |
948 | case PFMEM: | |
949 | range = bus_cur->rangePFMem; | |
950 | break; | |
951 | default: | |
952 | err ("cannot read resource type in find_range\n"); | |
953 | } | |
954 | ||
955 | while (range) { | |
956 | if (res->rangeno == range->rangeno) | |
957 | break; | |
958 | range = range->next; | |
959 | } | |
960 | return range; | |
961 | } | |
962 | ||
963 | /***************************************************************************** | |
964 | * This routine will check to make sure the io/mem/pfmem->len that the device asked for | |
965 | * can fit w/i our list of available IO/MEM/PFMEM resources. If cannot, returns -EINVAL, | |
966 | * otherwise, returns 0 | |
967 | * | |
968 | * Input: resource | |
969 | * Ouput: the correct start and end address are inputted into the resource node, | |
970 | * 0 or -EINVAL | |
971 | *****************************************************************************/ | |
972 | int ibmphp_check_resource (struct resource_node *res, u8 bridge) | |
973 | { | |
974 | struct bus_node *bus_cur; | |
975 | struct range_node *range = NULL; | |
976 | struct resource_node *res_prev; | |
977 | struct resource_node *res_cur = NULL; | |
978 | u32 len_cur = 0, start_cur = 0, len_tmp = 0; | |
979 | int noranges = 0; | |
980 | u32 tmp_start; /* this is to make sure start address is divisible by the length needed */ | |
981 | u32 tmp_divide; | |
dc6712d1 | 982 | u8 flag = 0; |
1da177e4 LT |
983 | |
984 | if (!res) | |
985 | return -EINVAL; | |
986 | ||
987 | if (bridge) { | |
988 | /* The rules for bridges are different, 4K divisible for IO, 1M for (pf)mem*/ | |
989 | if (res->type == IO) | |
990 | tmp_divide = IOBRIDGE; | |
991 | else | |
992 | tmp_divide = MEMBRIDGE; | |
993 | } else | |
994 | tmp_divide = res->len; | |
995 | ||
996 | bus_cur = find_bus_wprev (res->busno, NULL, 0); | |
997 | ||
998 | if (!bus_cur) { | |
999 | /* didn't find a bus, smth's wrong!!! */ | |
1000 | debug ("no bus in the system, either pci_dev's wrong or allocation failed\n"); | |
1001 | return -EINVAL; | |
1002 | } | |
1003 | ||
66bef8c0 | 1004 | debug ("%s - enter\n", __func__); |
1da177e4 LT |
1005 | debug ("bus_cur->busno is %d\n", bus_cur->busno); |
1006 | ||
1007 | /* This is a quick fix to not mess up with the code very much. i.e., | |
1008 | * 2000-2fff, len = 1000, but when we compare, we need it to be fff */ | |
1009 | res->len -= 1; | |
1010 | ||
1011 | switch (res->type) { | |
1012 | case IO: | |
1013 | res_cur = bus_cur->firstIO; | |
1014 | noranges = bus_cur->noIORanges; | |
1015 | break; | |
1016 | case MEM: | |
1017 | res_cur = bus_cur->firstMem; | |
1018 | noranges = bus_cur->noMemRanges; | |
1019 | break; | |
1020 | case PFMEM: | |
1021 | res_cur = bus_cur->firstPFMem; | |
1022 | noranges = bus_cur->noPFMemRanges; | |
1023 | break; | |
1024 | default: | |
1025 | err ("wrong type of resource to check\n"); | |
1026 | return -EINVAL; | |
1027 | } | |
1028 | res_prev = NULL; | |
1029 | ||
1030 | while (res_cur) { | |
1031 | range = find_range (bus_cur, res_cur); | |
66bef8c0 | 1032 | debug ("%s - rangeno = %d\n", __func__, res_cur->rangeno); |
1da177e4 LT |
1033 | |
1034 | if (!range) { | |
1035 | err ("no range for the device exists... bailing out...\n"); | |
1036 | return -EINVAL; | |
1037 | } | |
1038 | ||
1039 | /* found our range */ | |
1040 | if (!res_prev) { | |
1041 | /* first time in the loop */ | |
1042 | if ((res_cur->start != range->start) && ((len_tmp = res_cur->start - 1 - range->start) >= res->len)) { | |
1043 | debug ("len_tmp = %x\n", len_tmp); | |
1044 | ||
1045 | if ((len_tmp < len_cur) || (len_cur == 0)) { | |
1046 | ||
1047 | if ((range->start % tmp_divide) == 0) { | |
1048 | /* just perfect, starting address is divisible by length */ | |
dc6712d1 | 1049 | flag = 1; |
1da177e4 LT |
1050 | len_cur = len_tmp; |
1051 | start_cur = range->start; | |
1052 | } else { | |
1053 | /* Needs adjusting */ | |
1054 | tmp_start = range->start; | |
dc6712d1 | 1055 | flag = 0; |
1da177e4 LT |
1056 | |
1057 | while ((len_tmp = res_cur->start - 1 - tmp_start) >= res->len) { | |
1058 | if ((tmp_start % tmp_divide) == 0) { | |
dc6712d1 | 1059 | flag = 1; |
1da177e4 LT |
1060 | len_cur = len_tmp; |
1061 | start_cur = tmp_start; | |
1062 | break; | |
1063 | } | |
1064 | tmp_start += tmp_divide - tmp_start % tmp_divide; | |
1065 | if (tmp_start >= res_cur->start - 1) | |
1066 | break; | |
1067 | } | |
1068 | } | |
1069 | ||
1070 | if (flag && len_cur == res->len) { | |
1071 | debug ("but we are not here, right?\n"); | |
1072 | res->start = start_cur; | |
1073 | res->len += 1; /* To restore the balance */ | |
1074 | res->end = res->start + res->len - 1; | |
1075 | return 0; | |
1076 | } | |
1077 | } | |
1078 | } | |
1079 | } | |
1080 | if (!res_cur->next) { | |
1081 | /* last device on the range */ | |
1082 | if ((range->end != res_cur->end) && ((len_tmp = range->end - (res_cur->end + 1)) >= res->len)) { | |
1083 | debug ("len_tmp = %x\n", len_tmp); | |
1084 | if ((len_tmp < len_cur) || (len_cur == 0)) { | |
1085 | ||
1086 | if (((res_cur->end + 1) % tmp_divide) == 0) { | |
1087 | /* just perfect, starting address is divisible by length */ | |
dc6712d1 | 1088 | flag = 1; |
1da177e4 LT |
1089 | len_cur = len_tmp; |
1090 | start_cur = res_cur->end + 1; | |
1091 | } else { | |
1092 | /* Needs adjusting */ | |
1093 | tmp_start = res_cur->end + 1; | |
dc6712d1 | 1094 | flag = 0; |
1da177e4 LT |
1095 | |
1096 | while ((len_tmp = range->end - tmp_start) >= res->len) { | |
1097 | if ((tmp_start % tmp_divide) == 0) { | |
dc6712d1 | 1098 | flag = 1; |
1da177e4 LT |
1099 | len_cur = len_tmp; |
1100 | start_cur = tmp_start; | |
1101 | break; | |
1102 | } | |
1103 | tmp_start += tmp_divide - tmp_start % tmp_divide; | |
1104 | if (tmp_start >= range->end) | |
1105 | break; | |
1106 | } | |
1107 | } | |
1108 | if (flag && len_cur == res->len) { | |
1109 | res->start = start_cur; | |
1110 | res->len += 1; /* To restore the balance */ | |
1111 | res->end = res->start + res->len - 1; | |
1112 | return 0; | |
1113 | } | |
1114 | } | |
1115 | } | |
1116 | } | |
1117 | ||
1118 | if (res_prev) { | |
1119 | if (res_prev->rangeno != res_cur->rangeno) { | |
1120 | /* 1st device on this range */ | |
1121 | if ((res_cur->start != range->start) && | |
1122 | ((len_tmp = res_cur->start - 1 - range->start) >= res->len)) { | |
1123 | if ((len_tmp < len_cur) || (len_cur == 0)) { | |
1124 | if ((range->start % tmp_divide) == 0) { | |
1125 | /* just perfect, starting address is divisible by length */ | |
dc6712d1 | 1126 | flag = 1; |
1da177e4 LT |
1127 | len_cur = len_tmp; |
1128 | start_cur = range->start; | |
1129 | } else { | |
1130 | /* Needs adjusting */ | |
1131 | tmp_start = range->start; | |
dc6712d1 | 1132 | flag = 0; |
1da177e4 LT |
1133 | |
1134 | while ((len_tmp = res_cur->start - 1 - tmp_start) >= res->len) { | |
1135 | if ((tmp_start % tmp_divide) == 0) { | |
dc6712d1 | 1136 | flag = 1; |
1da177e4 LT |
1137 | len_cur = len_tmp; |
1138 | start_cur = tmp_start; | |
1139 | break; | |
1140 | } | |
1141 | tmp_start += tmp_divide - tmp_start % tmp_divide; | |
1142 | if (tmp_start >= res_cur->start - 1) | |
1143 | break; | |
1144 | } | |
1145 | } | |
1146 | ||
1147 | if (flag && len_cur == res->len) { | |
1148 | res->start = start_cur; | |
1149 | res->len += 1; /* To restore the balance */ | |
1150 | res->end = res->start + res->len - 1; | |
1151 | return 0; | |
1152 | } | |
1153 | } | |
1154 | } | |
1155 | } else { | |
1156 | /* in the same range */ | |
1157 | if ((len_tmp = res_cur->start - 1 - res_prev->end - 1) >= res->len) { | |
1158 | if ((len_tmp < len_cur) || (len_cur == 0)) { | |
1159 | if (((res_prev->end + 1) % tmp_divide) == 0) { | |
1160 | /* just perfect, starting address's divisible by length */ | |
dc6712d1 | 1161 | flag = 1; |
1da177e4 LT |
1162 | len_cur = len_tmp; |
1163 | start_cur = res_prev->end + 1; | |
1164 | } else { | |
1165 | /* Needs adjusting */ | |
1166 | tmp_start = res_prev->end + 1; | |
dc6712d1 | 1167 | flag = 0; |
1da177e4 LT |
1168 | |
1169 | while ((len_tmp = res_cur->start - 1 - tmp_start) >= res->len) { | |
1170 | if ((tmp_start % tmp_divide) == 0) { | |
dc6712d1 | 1171 | flag = 1; |
1da177e4 LT |
1172 | len_cur = len_tmp; |
1173 | start_cur = tmp_start; | |
1174 | break; | |
1175 | } | |
1176 | tmp_start += tmp_divide - tmp_start % tmp_divide; | |
1177 | if (tmp_start >= res_cur->start - 1) | |
1178 | break; | |
1179 | } | |
1180 | } | |
1181 | ||
1182 | if (flag && len_cur == res->len) { | |
1183 | res->start = start_cur; | |
1184 | res->len += 1; /* To restore the balance */ | |
1185 | res->end = res->start + res->len - 1; | |
1186 | return 0; | |
1187 | } | |
1188 | } | |
1189 | } | |
1190 | } | |
1191 | } | |
1192 | /* end if (res_prev) */ | |
1193 | res_prev = res_cur; | |
1194 | if (res_cur->next) | |
1195 | res_cur = res_cur->next; | |
1196 | else | |
1197 | res_cur = res_cur->nextRange; | |
1198 | } /* end of while */ | |
1199 | ||
1200 | ||
1201 | if (!res_prev) { | |
1202 | /* 1st device ever */ | |
1203 | /* need to find appropriate range */ | |
1204 | switch (res->type) { | |
1205 | case IO: | |
1206 | range = bus_cur->rangeIO; | |
1207 | break; | |
1208 | case MEM: | |
1209 | range = bus_cur->rangeMem; | |
1210 | break; | |
1211 | case PFMEM: | |
1212 | range = bus_cur->rangePFMem; | |
1213 | break; | |
1214 | } | |
1215 | while (range) { | |
1216 | if ((len_tmp = range->end - range->start) >= res->len) { | |
1217 | if ((len_tmp < len_cur) || (len_cur == 0)) { | |
1218 | if ((range->start % tmp_divide) == 0) { | |
1219 | /* just perfect, starting address's divisible by length */ | |
dc6712d1 | 1220 | flag = 1; |
1da177e4 LT |
1221 | len_cur = len_tmp; |
1222 | start_cur = range->start; | |
1223 | } else { | |
1224 | /* Needs adjusting */ | |
1225 | tmp_start = range->start; | |
dc6712d1 | 1226 | flag = 0; |
1da177e4 LT |
1227 | |
1228 | while ((len_tmp = range->end - tmp_start) >= res->len) { | |
1229 | if ((tmp_start % tmp_divide) == 0) { | |
dc6712d1 | 1230 | flag = 1; |
1da177e4 LT |
1231 | len_cur = len_tmp; |
1232 | start_cur = tmp_start; | |
1233 | break; | |
1234 | } | |
1235 | tmp_start += tmp_divide - tmp_start % tmp_divide; | |
1236 | if (tmp_start >= range->end) | |
1237 | break; | |
1238 | } | |
1239 | } | |
1240 | ||
1241 | if (flag && len_cur == res->len) { | |
1242 | res->start = start_cur; | |
1243 | res->len += 1; /* To restore the balance */ | |
1244 | res->end = res->start + res->len - 1; | |
1245 | return 0; | |
1246 | } | |
1247 | } | |
1248 | } | |
1249 | range = range->next; | |
1250 | } /* end of while */ | |
1251 | ||
1252 | if ((!range) && (len_cur == 0)) { | |
1253 | /* have gone through the list of devices and ranges and haven't found n.e.thing */ | |
1254 | err ("no appropriate range.. bailing out...\n"); | |
1255 | return -EINVAL; | |
1256 | } else if (len_cur) { | |
1257 | res->start = start_cur; | |
1258 | res->len += 1; /* To restore the balance */ | |
1259 | res->end = res->start + res->len - 1; | |
1260 | return 0; | |
1261 | } | |
1262 | } | |
1263 | ||
1264 | if (!res_cur) { | |
1265 | debug ("prev->rangeno = %d, noranges = %d\n", res_prev->rangeno, noranges); | |
1266 | if (res_prev->rangeno < noranges) { | |
1267 | /* if there're more ranges out there to check */ | |
1268 | switch (res->type) { | |
1269 | case IO: | |
1270 | range = bus_cur->rangeIO; | |
1271 | break; | |
1272 | case MEM: | |
1273 | range = bus_cur->rangeMem; | |
1274 | break; | |
1275 | case PFMEM: | |
1276 | range = bus_cur->rangePFMem; | |
1277 | break; | |
1278 | } | |
1279 | while (range) { | |
1280 | if ((len_tmp = range->end - range->start) >= res->len) { | |
1281 | if ((len_tmp < len_cur) || (len_cur == 0)) { | |
1282 | if ((range->start % tmp_divide) == 0) { | |
1283 | /* just perfect, starting address's divisible by length */ | |
dc6712d1 | 1284 | flag = 1; |
1da177e4 LT |
1285 | len_cur = len_tmp; |
1286 | start_cur = range->start; | |
1287 | } else { | |
1288 | /* Needs adjusting */ | |
1289 | tmp_start = range->start; | |
dc6712d1 | 1290 | flag = 0; |
1da177e4 LT |
1291 | |
1292 | while ((len_tmp = range->end - tmp_start) >= res->len) { | |
1293 | if ((tmp_start % tmp_divide) == 0) { | |
dc6712d1 | 1294 | flag = 1; |
1da177e4 LT |
1295 | len_cur = len_tmp; |
1296 | start_cur = tmp_start; | |
1297 | break; | |
1298 | } | |
1299 | tmp_start += tmp_divide - tmp_start % tmp_divide; | |
1300 | if (tmp_start >= range->end) | |
1301 | break; | |
1302 | } | |
1303 | } | |
1304 | ||
1305 | if (flag && len_cur == res->len) { | |
1306 | res->start = start_cur; | |
1307 | res->len += 1; /* To restore the balance */ | |
1308 | res->end = res->start + res->len - 1; | |
1309 | return 0; | |
1310 | } | |
1311 | } | |
1312 | } | |
1313 | range = range->next; | |
1314 | } /* end of while */ | |
1315 | ||
1316 | if ((!range) && (len_cur == 0)) { | |
1317 | /* have gone through the list of devices and ranges and haven't found n.e.thing */ | |
1318 | err ("no appropriate range.. bailing out...\n"); | |
1319 | return -EINVAL; | |
1320 | } else if (len_cur) { | |
1321 | res->start = start_cur; | |
1322 | res->len += 1; /* To restore the balance */ | |
1323 | res->end = res->start + res->len - 1; | |
1324 | return 0; | |
1325 | } | |
1326 | } else { | |
1327 | /* no more ranges to check on */ | |
1328 | if (len_cur) { | |
1329 | res->start = start_cur; | |
1330 | res->len += 1; /* To restore the balance */ | |
1331 | res->end = res->start + res->len - 1; | |
1332 | return 0; | |
1333 | } else { | |
1334 | /* have gone through the list of devices and haven't found n.e.thing */ | |
1335 | err ("no appropriate range.. bailing out...\n"); | |
1336 | return -EINVAL; | |
1337 | } | |
1338 | } | |
1339 | } /* end if(!res_cur) */ | |
1340 | return -EINVAL; | |
1341 | } | |
1342 | ||
1343 | /******************************************************************************** | |
1344 | * This routine is called from remove_card if the card contained PPB. | |
1345 | * It will remove all the resources on the bus as well as the bus itself | |
1346 | * Input: Bus | |
1347 | * Ouput: 0, -ENODEV | |
1348 | ********************************************************************************/ | |
1349 | int ibmphp_remove_bus (struct bus_node *bus, u8 parent_busno) | |
1350 | { | |
1351 | struct resource_node *res_cur; | |
1352 | struct resource_node *res_tmp; | |
1353 | struct bus_node *prev_bus; | |
1354 | int rc; | |
1355 | ||
1356 | prev_bus = find_bus_wprev (parent_busno, NULL, 0); | |
1357 | ||
1358 | if (!prev_bus) { | |
1359 | debug ("something terribly wrong. Cannot find parent bus to the one to remove\n"); | |
1360 | return -ENODEV; | |
1361 | } | |
1362 | ||
1363 | debug ("In ibmphp_remove_bus... prev_bus->busno is %x\n", prev_bus->busno); | |
1364 | ||
1365 | rc = remove_ranges (bus, prev_bus); | |
1366 | if (rc) | |
1367 | return rc; | |
1368 | ||
1369 | if (bus->firstIO) { | |
1370 | res_cur = bus->firstIO; | |
1371 | while (res_cur) { | |
1372 | res_tmp = res_cur; | |
1373 | if (res_cur->next) | |
1374 | res_cur = res_cur->next; | |
1375 | else | |
1376 | res_cur = res_cur->nextRange; | |
1377 | kfree (res_tmp); | |
1378 | res_tmp = NULL; | |
1379 | } | |
1380 | bus->firstIO = NULL; | |
1381 | } | |
1382 | if (bus->firstMem) { | |
1383 | res_cur = bus->firstMem; | |
1384 | while (res_cur) { | |
1385 | res_tmp = res_cur; | |
1386 | if (res_cur->next) | |
1387 | res_cur = res_cur->next; | |
1388 | else | |
1389 | res_cur = res_cur->nextRange; | |
1390 | kfree (res_tmp); | |
1391 | res_tmp = NULL; | |
1392 | } | |
1393 | bus->firstMem = NULL; | |
1394 | } | |
1395 | if (bus->firstPFMem) { | |
1396 | res_cur = bus->firstPFMem; | |
1397 | while (res_cur) { | |
1398 | res_tmp = res_cur; | |
1399 | if (res_cur->next) | |
1400 | res_cur = res_cur->next; | |
1401 | else | |
1402 | res_cur = res_cur->nextRange; | |
1403 | kfree (res_tmp); | |
1404 | res_tmp = NULL; | |
1405 | } | |
1406 | bus->firstPFMem = NULL; | |
1407 | } | |
1408 | ||
1409 | if (bus->firstPFMemFromMem) { | |
1410 | res_cur = bus->firstPFMemFromMem; | |
1411 | while (res_cur) { | |
1412 | res_tmp = res_cur; | |
1413 | res_cur = res_cur->next; | |
1414 | ||
1415 | kfree (res_tmp); | |
1416 | res_tmp = NULL; | |
1417 | } | |
1418 | bus->firstPFMemFromMem = NULL; | |
1419 | } | |
1420 | ||
1421 | list_del (&bus->bus_list); | |
1422 | kfree (bus); | |
1423 | return 0; | |
1424 | } | |
1425 | ||
1426 | /****************************************************************************** | |
1427 | * This routine deletes the ranges from a given bus, and the entries from the | |
1428 | * parent's bus in the resources | |
1429 | * Input: current bus, previous bus | |
1430 | * Output: 0, -EINVAL | |
1431 | ******************************************************************************/ | |
1432 | static int remove_ranges (struct bus_node *bus_cur, struct bus_node *bus_prev) | |
1433 | { | |
1434 | struct range_node *range_cur; | |
1435 | struct range_node *range_tmp; | |
1436 | int i; | |
1437 | struct resource_node *res = NULL; | |
1438 | ||
1439 | if (bus_cur->noIORanges) { | |
1440 | range_cur = bus_cur->rangeIO; | |
1441 | for (i = 0; i < bus_cur->noIORanges; i++) { | |
1442 | if (ibmphp_find_resource (bus_prev, range_cur->start, &res, IO) < 0) | |
1443 | return -EINVAL; | |
1444 | ibmphp_remove_resource (res); | |
1445 | ||
1446 | range_tmp = range_cur; | |
1447 | range_cur = range_cur->next; | |
1448 | kfree (range_tmp); | |
1449 | range_tmp = NULL; | |
1450 | } | |
1451 | bus_cur->rangeIO = NULL; | |
1452 | } | |
1453 | if (bus_cur->noMemRanges) { | |
1454 | range_cur = bus_cur->rangeMem; | |
1455 | for (i = 0; i < bus_cur->noMemRanges; i++) { | |
1456 | if (ibmphp_find_resource (bus_prev, range_cur->start, &res, MEM) < 0) | |
1457 | return -EINVAL; | |
1458 | ||
1459 | ibmphp_remove_resource (res); | |
1460 | range_tmp = range_cur; | |
1461 | range_cur = range_cur->next; | |
1462 | kfree (range_tmp); | |
1463 | range_tmp = NULL; | |
1464 | } | |
1465 | bus_cur->rangeMem = NULL; | |
1466 | } | |
1467 | if (bus_cur->noPFMemRanges) { | |
1468 | range_cur = bus_cur->rangePFMem; | |
1469 | for (i = 0; i < bus_cur->noPFMemRanges; i++) { | |
1470 | if (ibmphp_find_resource (bus_prev, range_cur->start, &res, PFMEM) < 0) | |
1471 | return -EINVAL; | |
1472 | ||
1473 | ibmphp_remove_resource (res); | |
1474 | range_tmp = range_cur; | |
1475 | range_cur = range_cur->next; | |
1476 | kfree (range_tmp); | |
1477 | range_tmp = NULL; | |
1478 | } | |
1479 | bus_cur->rangePFMem = NULL; | |
1480 | } | |
1481 | return 0; | |
1482 | } | |
1483 | ||
1484 | /* | |
1485 | * find the resource node in the bus | |
1486 | * Input: Resource needed, start address of the resource, type of resource | |
1487 | */ | |
1488 | int ibmphp_find_resource (struct bus_node *bus, u32 start_address, struct resource_node **res, int flag) | |
1489 | { | |
1490 | struct resource_node *res_cur = NULL; | |
1491 | char * type = ""; | |
1492 | ||
1493 | if (!bus) { | |
1494 | err ("The bus passed in NULL to find resource\n"); | |
1495 | return -ENODEV; | |
1496 | } | |
1497 | ||
1498 | switch (flag) { | |
1499 | case IO: | |
1500 | res_cur = bus->firstIO; | |
1501 | type = "io"; | |
1502 | break; | |
1503 | case MEM: | |
1504 | res_cur = bus->firstMem; | |
1505 | type = "mem"; | |
1506 | break; | |
1507 | case PFMEM: | |
1508 | res_cur = bus->firstPFMem; | |
1509 | type = "pfmem"; | |
1510 | break; | |
1511 | default: | |
1512 | err ("wrong type of flag\n"); | |
1513 | return -EINVAL; | |
1514 | } | |
1515 | ||
1516 | while (res_cur) { | |
1517 | if (res_cur->start == start_address) { | |
1518 | *res = res_cur; | |
1519 | break; | |
1520 | } | |
1521 | if (res_cur->next) | |
1522 | res_cur = res_cur->next; | |
1523 | else | |
1524 | res_cur = res_cur->nextRange; | |
1525 | } | |
1526 | ||
1527 | if (!res_cur) { | |
1528 | if (flag == PFMEM) { | |
1529 | res_cur = bus->firstPFMemFromMem; | |
1530 | while (res_cur) { | |
1531 | if (res_cur->start == start_address) { | |
1532 | *res = res_cur; | |
1533 | break; | |
1534 | } | |
1535 | res_cur = res_cur->next; | |
1536 | } | |
1537 | if (!res_cur) { | |
1538 | debug ("SOS...cannot find %s resource in the bus.\n", type); | |
1539 | return -EINVAL; | |
1540 | } | |
1541 | } else { | |
1542 | debug ("SOS... cannot find %s resource in the bus.\n", type); | |
1543 | return -EINVAL; | |
1544 | } | |
1545 | } | |
1546 | ||
1547 | if (*res) | |
1548 | debug ("*res->start = %x\n", (*res)->start); | |
1549 | ||
1550 | return 0; | |
1551 | } | |
1552 | ||
1553 | /*********************************************************************** | |
1554 | * This routine will free the resource structures used by the | |
1555 | * system. It is called from cleanup routine for the module | |
1556 | * Parameters: none | |
1557 | * Returns: none | |
1558 | ***********************************************************************/ | |
1559 | void ibmphp_free_resources (void) | |
1560 | { | |
1561 | struct bus_node *bus_cur = NULL; | |
1562 | struct bus_node *bus_tmp; | |
1563 | struct range_node *range_cur; | |
1564 | struct range_node *range_tmp; | |
1565 | struct resource_node *res_cur; | |
1566 | struct resource_node *res_tmp; | |
1567 | struct list_head *tmp; | |
1568 | struct list_head *next; | |
1569 | int i = 0; | |
1570 | flags = 1; | |
1571 | ||
1572 | list_for_each_safe (tmp, next, &gbuses) { | |
1573 | bus_cur = list_entry (tmp, struct bus_node, bus_list); | |
1574 | if (bus_cur->noIORanges) { | |
1575 | range_cur = bus_cur->rangeIO; | |
1576 | for (i = 0; i < bus_cur->noIORanges; i++) { | |
1577 | if (!range_cur) | |
1578 | break; | |
1579 | range_tmp = range_cur; | |
1580 | range_cur = range_cur->next; | |
1581 | kfree (range_tmp); | |
1582 | range_tmp = NULL; | |
1583 | } | |
1584 | } | |
1585 | if (bus_cur->noMemRanges) { | |
1586 | range_cur = bus_cur->rangeMem; | |
1587 | for (i = 0; i < bus_cur->noMemRanges; i++) { | |
1588 | if (!range_cur) | |
1589 | break; | |
1590 | range_tmp = range_cur; | |
1591 | range_cur = range_cur->next; | |
1592 | kfree (range_tmp); | |
1593 | range_tmp = NULL; | |
1594 | } | |
1595 | } | |
1596 | if (bus_cur->noPFMemRanges) { | |
1597 | range_cur = bus_cur->rangePFMem; | |
1598 | for (i = 0; i < bus_cur->noPFMemRanges; i++) { | |
1599 | if (!range_cur) | |
1600 | break; | |
1601 | range_tmp = range_cur; | |
1602 | range_cur = range_cur->next; | |
1603 | kfree (range_tmp); | |
1604 | range_tmp = NULL; | |
1605 | } | |
1606 | } | |
1607 | ||
1608 | if (bus_cur->firstIO) { | |
1609 | res_cur = bus_cur->firstIO; | |
1610 | while (res_cur) { | |
1611 | res_tmp = res_cur; | |
1612 | if (res_cur->next) | |
1613 | res_cur = res_cur->next; | |
1614 | else | |
1615 | res_cur = res_cur->nextRange; | |
1616 | kfree (res_tmp); | |
1617 | res_tmp = NULL; | |
1618 | } | |
1619 | bus_cur->firstIO = NULL; | |
1620 | } | |
1621 | if (bus_cur->firstMem) { | |
1622 | res_cur = bus_cur->firstMem; | |
1623 | while (res_cur) { | |
1624 | res_tmp = res_cur; | |
1625 | if (res_cur->next) | |
1626 | res_cur = res_cur->next; | |
1627 | else | |
1628 | res_cur = res_cur->nextRange; | |
1629 | kfree (res_tmp); | |
1630 | res_tmp = NULL; | |
1631 | } | |
1632 | bus_cur->firstMem = NULL; | |
1633 | } | |
1634 | if (bus_cur->firstPFMem) { | |
1635 | res_cur = bus_cur->firstPFMem; | |
1636 | while (res_cur) { | |
1637 | res_tmp = res_cur; | |
1638 | if (res_cur->next) | |
1639 | res_cur = res_cur->next; | |
1640 | else | |
1641 | res_cur = res_cur->nextRange; | |
1642 | kfree (res_tmp); | |
1643 | res_tmp = NULL; | |
1644 | } | |
1645 | bus_cur->firstPFMem = NULL; | |
1646 | } | |
1647 | ||
1648 | if (bus_cur->firstPFMemFromMem) { | |
1649 | res_cur = bus_cur->firstPFMemFromMem; | |
1650 | while (res_cur) { | |
1651 | res_tmp = res_cur; | |
1652 | res_cur = res_cur->next; | |
1653 | ||
1654 | kfree (res_tmp); | |
1655 | res_tmp = NULL; | |
1656 | } | |
1657 | bus_cur->firstPFMemFromMem = NULL; | |
1658 | } | |
1659 | ||
1660 | bus_tmp = bus_cur; | |
1661 | list_del (&bus_cur->bus_list); | |
1662 | kfree (bus_tmp); | |
1663 | bus_tmp = NULL; | |
1664 | } | |
1665 | } | |
1666 | ||
1667 | /********************************************************************************* | |
1668 | * This function will go over the PFmem resources to check if the EBDA allocated | |
1669 | * pfmem out of memory buckets of the bus. If so, it will change the range numbers | |
1670 | * and a flag to indicate that this resource is out of memory. It will also move the | |
1671 | * Pfmem out of the pfmem resource list to the PFMemFromMem list, and will create | |
1672 | * a new Mem node | |
1673 | * This routine is called right after initialization | |
1674 | *******************************************************************************/ | |
1675 | static int __init once_over (void) | |
1676 | { | |
1677 | struct resource_node *pfmem_cur; | |
1678 | struct resource_node *pfmem_prev; | |
1679 | struct resource_node *mem; | |
1680 | struct bus_node *bus_cur; | |
1681 | struct list_head *tmp; | |
1682 | ||
1683 | list_for_each (tmp, &gbuses) { | |
1684 | bus_cur = list_entry (tmp, struct bus_node, bus_list); | |
1685 | if ((!bus_cur->rangePFMem) && (bus_cur->firstPFMem)) { | |
1686 | for (pfmem_cur = bus_cur->firstPFMem, pfmem_prev = NULL; pfmem_cur; pfmem_prev = pfmem_cur, pfmem_cur = pfmem_cur->next) { | |
dc6712d1 | 1687 | pfmem_cur->fromMem = 1; |
1da177e4 LT |
1688 | if (pfmem_prev) |
1689 | pfmem_prev->next = pfmem_cur->next; | |
1690 | else | |
1691 | bus_cur->firstPFMem = pfmem_cur->next; | |
1692 | ||
1693 | if (!bus_cur->firstPFMemFromMem) | |
1694 | pfmem_cur->next = NULL; | |
1695 | else | |
1696 | /* we don't need to sort PFMemFromMem since we're using mem node for | |
1697 | all the real work anyways, so just insert at the beginning of the | |
1698 | list | |
1699 | */ | |
1700 | pfmem_cur->next = bus_cur->firstPFMemFromMem; | |
1701 | ||
1702 | bus_cur->firstPFMemFromMem = pfmem_cur; | |
1703 | ||
f5afe806 | 1704 | mem = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
1da177e4 LT |
1705 | if (!mem) { |
1706 | err ("out of system memory\n"); | |
1707 | return -ENOMEM; | |
1708 | } | |
1da177e4 LT |
1709 | mem->type = MEM; |
1710 | mem->busno = pfmem_cur->busno; | |
1711 | mem->devfunc = pfmem_cur->devfunc; | |
1712 | mem->start = pfmem_cur->start; | |
1713 | mem->end = pfmem_cur->end; | |
1714 | mem->len = pfmem_cur->len; | |
1715 | if (ibmphp_add_resource (mem) < 0) | |
1716 | err ("Trouble...trouble... EBDA allocated pfmem from mem, but system doesn't display it has this space... unless not PCI device...\n"); | |
1717 | pfmem_cur->rangeno = mem->rangeno; | |
1718 | } /* end for pfmem */ | |
1719 | } /* end if */ | |
1720 | } /* end list_for_each bus */ | |
1721 | return 0; | |
1722 | } | |
1723 | ||
1724 | int ibmphp_add_pfmem_from_mem (struct resource_node *pfmem) | |
1725 | { | |
1726 | struct bus_node *bus_cur = find_bus_wprev (pfmem->busno, NULL, 0); | |
1727 | ||
1728 | if (!bus_cur) { | |
1729 | err ("cannot find bus of pfmem to add...\n"); | |
1730 | return -ENODEV; | |
1731 | } | |
1732 | ||
1733 | if (bus_cur->firstPFMemFromMem) | |
1734 | pfmem->next = bus_cur->firstPFMemFromMem; | |
1735 | else | |
1736 | pfmem->next = NULL; | |
1737 | ||
1738 | bus_cur->firstPFMemFromMem = pfmem; | |
1739 | ||
1740 | return 0; | |
1741 | } | |
1742 | ||
1743 | /* This routine just goes through the buses to see if the bus already exists. | |
1744 | * It is called from ibmphp_find_sec_number, to find out a secondary bus number for | |
1745 | * bridged cards | |
1746 | * Parameters: bus_number | |
1747 | * Returns: Bus pointer or NULL | |
1748 | */ | |
1749 | struct bus_node *ibmphp_find_res_bus (u8 bus_number) | |
1750 | { | |
1751 | return find_bus_wprev (bus_number, NULL, 0); | |
1752 | } | |
1753 | ||
1754 | static struct bus_node *find_bus_wprev (u8 bus_number, struct bus_node **prev, u8 flag) | |
1755 | { | |
1756 | struct bus_node *bus_cur; | |
1757 | struct list_head *tmp; | |
1758 | struct list_head *tmp_prev; | |
1759 | ||
1760 | list_for_each (tmp, &gbuses) { | |
1761 | tmp_prev = tmp->prev; | |
1762 | bus_cur = list_entry (tmp, struct bus_node, bus_list); | |
1763 | if (flag) | |
1764 | *prev = list_entry (tmp_prev, struct bus_node, bus_list); | |
1765 | if (bus_cur->busno == bus_number) | |
1766 | return bus_cur; | |
1767 | } | |
1768 | ||
1769 | return NULL; | |
1770 | } | |
1771 | ||
1772 | void ibmphp_print_test (void) | |
1773 | { | |
1774 | int i = 0; | |
1775 | struct bus_node *bus_cur = NULL; | |
1776 | struct range_node *range; | |
1777 | struct resource_node *res; | |
1778 | struct list_head *tmp; | |
1779 | ||
1780 | debug_pci ("*****************START**********************\n"); | |
1781 | ||
1782 | if ((!list_empty(&gbuses)) && flags) { | |
1783 | err ("The GBUSES is not NULL?!?!?!?!?\n"); | |
1784 | return; | |
1785 | } | |
1786 | ||
1787 | list_for_each (tmp, &gbuses) { | |
1788 | bus_cur = list_entry (tmp, struct bus_node, bus_list); | |
1789 | debug_pci ("This is bus # %d. There are\n", bus_cur->busno); | |
1790 | debug_pci ("IORanges = %d\t", bus_cur->noIORanges); | |
1791 | debug_pci ("MemRanges = %d\t", bus_cur->noMemRanges); | |
1792 | debug_pci ("PFMemRanges = %d\n", bus_cur->noPFMemRanges); | |
1793 | debug_pci ("The IO Ranges are as follows:\n"); | |
1794 | if (bus_cur->rangeIO) { | |
1795 | range = bus_cur->rangeIO; | |
1796 | for (i = 0; i < bus_cur->noIORanges; i++) { | |
1797 | debug_pci ("rangeno is %d\n", range->rangeno); | |
1798 | debug_pci ("[%x - %x]\n", range->start, range->end); | |
1799 | range = range->next; | |
1800 | } | |
1801 | } | |
1802 | ||
1803 | debug_pci ("The Mem Ranges are as follows:\n"); | |
1804 | if (bus_cur->rangeMem) { | |
1805 | range = bus_cur->rangeMem; | |
1806 | for (i = 0; i < bus_cur->noMemRanges; i++) { | |
1807 | debug_pci ("rangeno is %d\n", range->rangeno); | |
1808 | debug_pci ("[%x - %x]\n", range->start, range->end); | |
1809 | range = range->next; | |
1810 | } | |
1811 | } | |
1812 | ||
1813 | debug_pci ("The PFMem Ranges are as follows:\n"); | |
1814 | ||
1815 | if (bus_cur->rangePFMem) { | |
1816 | range = bus_cur->rangePFMem; | |
1817 | for (i = 0; i < bus_cur->noPFMemRanges; i++) { | |
1818 | debug_pci ("rangeno is %d\n", range->rangeno); | |
1819 | debug_pci ("[%x - %x]\n", range->start, range->end); | |
1820 | range = range->next; | |
1821 | } | |
1822 | } | |
1823 | ||
1824 | debug_pci ("The resources on this bus are as follows\n"); | |
1825 | ||
1826 | debug_pci ("IO...\n"); | |
1827 | if (bus_cur->firstIO) { | |
1828 | res = bus_cur->firstIO; | |
1829 | while (res) { | |
1830 | debug_pci ("The range # is %d\n", res->rangeno); | |
1831 | debug_pci ("The bus, devfnc is %d, %x\n", res->busno, res->devfunc); | |
1832 | debug_pci ("[%x - %x], len=%x\n", res->start, res->end, res->len); | |
1833 | if (res->next) | |
1834 | res = res->next; | |
1835 | else if (res->nextRange) | |
1836 | res = res->nextRange; | |
1837 | else | |
1838 | break; | |
1839 | } | |
1840 | } | |
1841 | debug_pci ("Mem...\n"); | |
1842 | if (bus_cur->firstMem) { | |
1843 | res = bus_cur->firstMem; | |
1844 | while (res) { | |
1845 | debug_pci ("The range # is %d\n", res->rangeno); | |
1846 | debug_pci ("The bus, devfnc is %d, %x\n", res->busno, res->devfunc); | |
1847 | debug_pci ("[%x - %x], len=%x\n", res->start, res->end, res->len); | |
1848 | if (res->next) | |
1849 | res = res->next; | |
1850 | else if (res->nextRange) | |
1851 | res = res->nextRange; | |
1852 | else | |
1853 | break; | |
1854 | } | |
1855 | } | |
1856 | debug_pci ("PFMem...\n"); | |
1857 | if (bus_cur->firstPFMem) { | |
1858 | res = bus_cur->firstPFMem; | |
1859 | while (res) { | |
1860 | debug_pci ("The range # is %d\n", res->rangeno); | |
1861 | debug_pci ("The bus, devfnc is %d, %x\n", res->busno, res->devfunc); | |
1862 | debug_pci ("[%x - %x], len=%x\n", res->start, res->end, res->len); | |
1863 | if (res->next) | |
1864 | res = res->next; | |
1865 | else if (res->nextRange) | |
1866 | res = res->nextRange; | |
1867 | else | |
1868 | break; | |
1869 | } | |
1870 | } | |
1871 | ||
1872 | debug_pci ("PFMemFromMem...\n"); | |
1873 | if (bus_cur->firstPFMemFromMem) { | |
1874 | res = bus_cur->firstPFMemFromMem; | |
1875 | while (res) { | |
1876 | debug_pci ("The range # is %d\n", res->rangeno); | |
1877 | debug_pci ("The bus, devfnc is %d, %x\n", res->busno, res->devfunc); | |
1878 | debug_pci ("[%x - %x], len=%x\n", res->start, res->end, res->len); | |
1879 | res = res->next; | |
1880 | } | |
1881 | } | |
1882 | } | |
1883 | debug_pci ("***********************END***********************\n"); | |
1884 | } | |
1885 | ||
1886 | static int range_exists_already (struct range_node * range, struct bus_node * bus_cur, u8 type) | |
1887 | { | |
1888 | struct range_node * range_cur = NULL; | |
1889 | switch (type) { | |
1890 | case IO: | |
1891 | range_cur = bus_cur->rangeIO; | |
1892 | break; | |
1893 | case MEM: | |
1894 | range_cur = bus_cur->rangeMem; | |
1895 | break; | |
1896 | case PFMEM: | |
1897 | range_cur = bus_cur->rangePFMem; | |
1898 | break; | |
1899 | default: | |
1900 | err ("wrong type passed to find out if range already exists\n"); | |
1901 | return -ENODEV; | |
1902 | } | |
1903 | ||
1904 | while (range_cur) { | |
1905 | if ((range_cur->start == range->start) && (range_cur->end == range->end)) | |
1906 | return 1; | |
1907 | range_cur = range_cur->next; | |
1908 | } | |
1909 | ||
1910 | return 0; | |
1911 | } | |
1912 | ||
1913 | /* This routine will read the windows for any PPB we have and update the | |
1914 | * range info for the secondary bus, and will also input this info into | |
1915 | * primary bus, since BIOS doesn't. This is for PPB that are in the system | |
1916 | * on bootup. For bridged cards that were added during previous load of the | |
1917 | * driver, only the ranges and the bus structure are added, the devices are | |
1918 | * added from NVRAM | |
1919 | * Input: primary busno | |
1920 | * Returns: none | |
1921 | * Note: this function doesn't take into account IO restrictions etc, | |
1922 | * so will only work for bridges with no video/ISA devices behind them It | |
1923 | * also will not work for onboard PPB's that can have more than 1 *bus | |
1924 | * behind them All these are TO DO. | |
1925 | * Also need to add more error checkings... (from fnc returns etc) | |
1926 | */ | |
1927 | static int __init update_bridge_ranges (struct bus_node **bus) | |
1928 | { | |
1929 | u8 sec_busno, device, function, hdr_type, start_io_address, end_io_address; | |
1930 | u16 vendor_id, upper_io_start, upper_io_end, start_mem_address, end_mem_address; | |
1931 | u32 start_address, end_address, upper_start, upper_end; | |
1932 | struct bus_node *bus_sec; | |
1933 | struct bus_node *bus_cur; | |
1934 | struct resource_node *io; | |
1935 | struct resource_node *mem; | |
1936 | struct resource_node *pfmem; | |
1937 | struct range_node *range; | |
1938 | unsigned int devfn; | |
1939 | ||
1940 | bus_cur = *bus; | |
1941 | if (!bus_cur) | |
1942 | return -ENODEV; | |
1943 | ibmphp_pci_bus->number = bus_cur->busno; | |
1944 | ||
66bef8c0 | 1945 | debug ("inside %s\n", __func__); |
1da177e4 LT |
1946 | debug ("bus_cur->busno = %x\n", bus_cur->busno); |
1947 | ||
1948 | for (device = 0; device < 32; device++) { | |
1949 | for (function = 0x00; function < 0x08; function++) { | |
1950 | devfn = PCI_DEVFN(device, function); | |
1951 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_VENDOR_ID, &vendor_id); | |
1952 | ||
1953 | if (vendor_id != PCI_VENDOR_ID_NOTVALID) { | |
1954 | /* found correct device!!! */ | |
1955 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_HEADER_TYPE, &hdr_type); | |
1956 | ||
1957 | switch (hdr_type) { | |
1958 | case PCI_HEADER_TYPE_NORMAL: | |
1959 | function = 0x8; | |
1960 | break; | |
1961 | case PCI_HEADER_TYPE_MULTIDEVICE: | |
1962 | break; | |
1963 | case PCI_HEADER_TYPE_BRIDGE: | |
1964 | function = 0x8; | |
1965 | case PCI_HEADER_TYPE_MULTIBRIDGE: | |
1966 | /* We assume here that only 1 bus behind the bridge | |
1967 | TO DO: add functionality for several: | |
1968 | temp = secondary; | |
1969 | while (temp < subordinate) { | |
1970 | ... | |
1971 | temp++; | |
1972 | } | |
1973 | */ | |
1974 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_SECONDARY_BUS, &sec_busno); | |
1975 | bus_sec = find_bus_wprev (sec_busno, NULL, 0); | |
1976 | /* this bus structure doesn't exist yet, PPB was configured during previous loading of ibmphp */ | |
1977 | if (!bus_sec) { | |
1978 | bus_sec = alloc_error_bus (NULL, sec_busno, 1); | |
1979 | /* the rest will be populated during NVRAM call */ | |
1980 | return 0; | |
1981 | } | |
1982 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_IO_BASE, &start_io_address); | |
1983 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_IO_LIMIT, &end_io_address); | |
1984 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_IO_BASE_UPPER16, &upper_io_start); | |
1985 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_IO_LIMIT_UPPER16, &upper_io_end); | |
1986 | start_address = (start_io_address & PCI_IO_RANGE_MASK) << 8; | |
1987 | start_address |= (upper_io_start << 16); | |
1988 | end_address = (end_io_address & PCI_IO_RANGE_MASK) << 8; | |
1989 | end_address |= (upper_io_end << 16); | |
1990 | ||
1991 | if ((start_address) && (start_address <= end_address)) { | |
f5afe806 | 1992 | range = kzalloc(sizeof(struct range_node), GFP_KERNEL); |
1da177e4 LT |
1993 | if (!range) { |
1994 | err ("out of system memory\n"); | |
1995 | return -ENOMEM; | |
1996 | } | |
1da177e4 LT |
1997 | range->start = start_address; |
1998 | range->end = end_address + 0xfff; | |
1999 | ||
2000 | if (bus_sec->noIORanges > 0) { | |
2001 | if (!range_exists_already (range, bus_sec, IO)) { | |
c85e4aae | 2002 | add_bus_range (IO, range, bus_sec); |
1da177e4 LT |
2003 | ++bus_sec->noIORanges; |
2004 | } else { | |
2005 | kfree (range); | |
2006 | range = NULL; | |
2007 | } | |
2008 | } else { | |
2009 | /* 1st IO Range on the bus */ | |
2010 | range->rangeno = 1; | |
2011 | bus_sec->rangeIO = range; | |
2012 | ++bus_sec->noIORanges; | |
2013 | } | |
2014 | fix_resources (bus_sec); | |
2015 | ||
2016 | if (ibmphp_find_resource (bus_cur, start_address, &io, IO)) { | |
f5afe806 | 2017 | io = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
1da177e4 LT |
2018 | if (!io) { |
2019 | kfree (range); | |
2020 | err ("out of system memory\n"); | |
2021 | return -ENOMEM; | |
2022 | } | |
1da177e4 LT |
2023 | io->type = IO; |
2024 | io->busno = bus_cur->busno; | |
2025 | io->devfunc = ((device << 3) | (function & 0x7)); | |
2026 | io->start = start_address; | |
2027 | io->end = end_address + 0xfff; | |
2028 | io->len = io->end - io->start + 1; | |
2029 | ibmphp_add_resource (io); | |
2030 | } | |
2031 | } | |
2032 | ||
2033 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_MEMORY_BASE, &start_mem_address); | |
2034 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_MEMORY_LIMIT, &end_mem_address); | |
2035 | ||
2036 | start_address = 0x00000000 | (start_mem_address & PCI_MEMORY_RANGE_MASK) << 16; | |
2037 | end_address = 0x00000000 | (end_mem_address & PCI_MEMORY_RANGE_MASK) << 16; | |
2038 | ||
2039 | if ((start_address) && (start_address <= end_address)) { | |
2040 | ||
f5afe806 | 2041 | range = kzalloc(sizeof(struct range_node), GFP_KERNEL); |
1da177e4 LT |
2042 | if (!range) { |
2043 | err ("out of system memory\n"); | |
2044 | return -ENOMEM; | |
2045 | } | |
1da177e4 LT |
2046 | range->start = start_address; |
2047 | range->end = end_address + 0xfffff; | |
2048 | ||
2049 | if (bus_sec->noMemRanges > 0) { | |
2050 | if (!range_exists_already (range, bus_sec, MEM)) { | |
c85e4aae | 2051 | add_bus_range (MEM, range, bus_sec); |
1da177e4 LT |
2052 | ++bus_sec->noMemRanges; |
2053 | } else { | |
2054 | kfree (range); | |
2055 | range = NULL; | |
2056 | } | |
2057 | } else { | |
2058 | /* 1st Mem Range on the bus */ | |
2059 | range->rangeno = 1; | |
2060 | bus_sec->rangeMem = range; | |
2061 | ++bus_sec->noMemRanges; | |
2062 | } | |
2063 | ||
2064 | fix_resources (bus_sec); | |
2065 | ||
2066 | if (ibmphp_find_resource (bus_cur, start_address, &mem, MEM)) { | |
f5afe806 | 2067 | mem = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
1da177e4 LT |
2068 | if (!mem) { |
2069 | kfree (range); | |
2070 | err ("out of system memory\n"); | |
2071 | return -ENOMEM; | |
2072 | } | |
1da177e4 LT |
2073 | mem->type = MEM; |
2074 | mem->busno = bus_cur->busno; | |
2075 | mem->devfunc = ((device << 3) | (function & 0x7)); | |
2076 | mem->start = start_address; | |
2077 | mem->end = end_address + 0xfffff; | |
2078 | mem->len = mem->end - mem->start + 1; | |
2079 | ibmphp_add_resource (mem); | |
2080 | } | |
2081 | } | |
2082 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_BASE, &start_mem_address); | |
2083 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, &end_mem_address); | |
2084 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, PCI_PREF_BASE_UPPER32, &upper_start); | |
2085 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, PCI_PREF_LIMIT_UPPER32, &upper_end); | |
2086 | start_address = 0x00000000 | (start_mem_address & PCI_MEMORY_RANGE_MASK) << 16; | |
2087 | end_address = 0x00000000 | (end_mem_address & PCI_MEMORY_RANGE_MASK) << 16; | |
2088 | #if BITS_PER_LONG == 64 | |
2089 | start_address |= ((long) upper_start) << 32; | |
2090 | end_address |= ((long) upper_end) << 32; | |
2091 | #endif | |
2092 | ||
2093 | if ((start_address) && (start_address <= end_address)) { | |
2094 | ||
f5afe806 | 2095 | range = kzalloc(sizeof(struct range_node), GFP_KERNEL); |
1da177e4 LT |
2096 | if (!range) { |
2097 | err ("out of system memory\n"); | |
2098 | return -ENOMEM; | |
2099 | } | |
1da177e4 LT |
2100 | range->start = start_address; |
2101 | range->end = end_address + 0xfffff; | |
2102 | ||
2103 | if (bus_sec->noPFMemRanges > 0) { | |
2104 | if (!range_exists_already (range, bus_sec, PFMEM)) { | |
c85e4aae | 2105 | add_bus_range (PFMEM, range, bus_sec); |
1da177e4 LT |
2106 | ++bus_sec->noPFMemRanges; |
2107 | } else { | |
2108 | kfree (range); | |
2109 | range = NULL; | |
2110 | } | |
2111 | } else { | |
2112 | /* 1st PFMem Range on the bus */ | |
2113 | range->rangeno = 1; | |
2114 | bus_sec->rangePFMem = range; | |
2115 | ++bus_sec->noPFMemRanges; | |
2116 | } | |
2117 | ||
2118 | fix_resources (bus_sec); | |
2119 | if (ibmphp_find_resource (bus_cur, start_address, &pfmem, PFMEM)) { | |
f5afe806 | 2120 | pfmem = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
1da177e4 LT |
2121 | if (!pfmem) { |
2122 | kfree (range); | |
2123 | err ("out of system memory\n"); | |
2124 | return -ENOMEM; | |
2125 | } | |
1da177e4 LT |
2126 | pfmem->type = PFMEM; |
2127 | pfmem->busno = bus_cur->busno; | |
2128 | pfmem->devfunc = ((device << 3) | (function & 0x7)); | |
2129 | pfmem->start = start_address; | |
2130 | pfmem->end = end_address + 0xfffff; | |
2131 | pfmem->len = pfmem->end - pfmem->start + 1; | |
dc6712d1 | 2132 | pfmem->fromMem = 0; |
1da177e4 LT |
2133 | |
2134 | ibmphp_add_resource (pfmem); | |
2135 | } | |
2136 | } | |
2137 | break; | |
2138 | } /* end of switch */ | |
2139 | } /* end if vendor */ | |
2140 | } /* end for function */ | |
2141 | } /* end for device */ | |
2142 | ||
2143 | bus = &bus_cur; | |
2144 | return 0; | |
2145 | } |