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1da177e4 LT |
1 | /* |
2 | * Compaq Hot Plug Controller Driver | |
3 | * | |
4 | * Copyright (C) 1995,2001 Compaq Computer Corporation | |
5 | * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) | |
6 | * Copyright (C) 2001 IBM Corp. | |
7 | * | |
8 | * All rights reserved. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or (at | |
13 | * your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
18 | * NON INFRINGEMENT. See the GNU General Public License for more | |
19 | * details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | * | |
25 | * Send feedback to <greg@kroah.com> | |
26 | * | |
27 | */ | |
28 | ||
1da177e4 LT |
29 | #include <linux/module.h> |
30 | #include <linux/kernel.h> | |
31 | #include <linux/types.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/workqueue.h> | |
34 | #include <linux/interrupt.h> | |
35 | #include <linux/delay.h> | |
36 | #include <linux/wait.h> | |
37 | #include <linux/smp_lock.h> | |
38 | #include <linux/pci.h> | |
7a54f25c | 39 | #include <linux/pci_hotplug.h> |
1da177e4 LT |
40 | #include "cpqphp.h" |
41 | ||
42 | static u32 configure_new_device(struct controller* ctrl, struct pci_func *func, | |
43 | u8 behind_bridge, struct resource_lists *resources); | |
44 | static int configure_new_function(struct controller* ctrl, struct pci_func *func, | |
45 | u8 behind_bridge, struct resource_lists *resources); | |
46 | static void interrupt_event_handler(struct controller *ctrl); | |
47 | ||
48 | static struct semaphore event_semaphore; /* mutex for process loop (up if something to process) */ | |
49 | static struct semaphore event_exit; /* guard ensure thread has exited before calling it quits */ | |
50 | static int event_finished; | |
51 | static unsigned long pushbutton_pending; /* = 0 */ | |
52 | ||
53 | /* things needed for the long_delay function */ | |
54 | static struct semaphore delay_sem; | |
55 | static wait_queue_head_t delay_wait; | |
56 | ||
57 | /* delay is in jiffies to wait for */ | |
58 | static void long_delay(int delay) | |
59 | { | |
60 | DECLARE_WAITQUEUE(wait, current); | |
61 | ||
62 | /* only allow 1 customer into the delay queue at once | |
63 | * yes this makes some people wait even longer, but who really cares? | |
64 | * this is for _huge_ delays to make the hardware happy as the | |
65 | * signals bounce around | |
66 | */ | |
67 | down (&delay_sem); | |
68 | ||
69 | init_waitqueue_head(&delay_wait); | |
70 | ||
71 | add_wait_queue(&delay_wait, &wait); | |
72 | msleep_interruptible(jiffies_to_msecs(delay)); | |
73 | remove_wait_queue(&delay_wait, &wait); | |
74 | ||
75 | up(&delay_sem); | |
76 | } | |
77 | ||
78 | ||
79 | /* FIXME: The following line needs to be somewhere else... */ | |
80 | #define WRONG_BUS_FREQUENCY 0x07 | |
81 | static u8 handle_switch_change(u8 change, struct controller * ctrl) | |
82 | { | |
83 | int hp_slot; | |
84 | u8 rc = 0; | |
85 | u16 temp_word; | |
86 | struct pci_func *func; | |
87 | struct event_info *taskInfo; | |
88 | ||
89 | if (!change) | |
90 | return 0; | |
91 | ||
92 | /* Switch Change */ | |
93 | dbg("cpqsbd: Switch interrupt received.\n"); | |
94 | ||
95 | for (hp_slot = 0; hp_slot < 6; hp_slot++) { | |
96 | if (change & (0x1L << hp_slot)) { | |
97 | /********************************** | |
98 | * this one changed. | |
99 | **********************************/ | |
100 | func = cpqhp_slot_find(ctrl->bus, | |
101 | (hp_slot + ctrl->slot_device_offset), 0); | |
102 | ||
103 | /* this is the structure that tells the worker thread | |
104 | *what to do */ | |
105 | taskInfo = &(ctrl->event_queue[ctrl->next_event]); | |
106 | ctrl->next_event = (ctrl->next_event + 1) % 10; | |
107 | taskInfo->hp_slot = hp_slot; | |
108 | ||
109 | rc++; | |
110 | ||
111 | temp_word = ctrl->ctrl_int_comp >> 16; | |
112 | func->presence_save = (temp_word >> hp_slot) & 0x01; | |
113 | func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02; | |
114 | ||
115 | if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) { | |
116 | /********************************** | |
117 | * Switch opened | |
118 | **********************************/ | |
119 | ||
120 | func->switch_save = 0; | |
121 | ||
122 | taskInfo->event_type = INT_SWITCH_OPEN; | |
123 | } else { | |
124 | /********************************** | |
125 | * Switch closed | |
126 | **********************************/ | |
127 | ||
128 | func->switch_save = 0x10; | |
129 | ||
130 | taskInfo->event_type = INT_SWITCH_CLOSE; | |
131 | } | |
132 | } | |
133 | } | |
134 | ||
135 | return rc; | |
136 | } | |
137 | ||
138 | /** | |
139 | * cpqhp_find_slot: find the struct slot of given device | |
140 | * @ctrl: scan lots of this controller | |
141 | * @device: the device id to find | |
142 | */ | |
143 | static struct slot *cpqhp_find_slot(struct controller *ctrl, u8 device) | |
144 | { | |
145 | struct slot *slot = ctrl->slot; | |
146 | ||
147 | while (slot && (slot->device != device)) { | |
148 | slot = slot->next; | |
149 | } | |
150 | ||
151 | return slot; | |
152 | } | |
153 | ||
154 | ||
155 | static u8 handle_presence_change(u16 change, struct controller * ctrl) | |
156 | { | |
157 | int hp_slot; | |
158 | u8 rc = 0; | |
159 | u8 temp_byte; | |
160 | u16 temp_word; | |
161 | struct pci_func *func; | |
162 | struct event_info *taskInfo; | |
163 | struct slot *p_slot; | |
164 | ||
165 | if (!change) | |
166 | return 0; | |
167 | ||
168 | /********************************** | |
169 | * Presence Change | |
170 | **********************************/ | |
171 | dbg("cpqsbd: Presence/Notify input change.\n"); | |
172 | dbg(" Changed bits are 0x%4.4x\n", change ); | |
173 | ||
174 | for (hp_slot = 0; hp_slot < 6; hp_slot++) { | |
175 | if (change & (0x0101 << hp_slot)) { | |
176 | /********************************** | |
177 | * this one changed. | |
178 | **********************************/ | |
179 | func = cpqhp_slot_find(ctrl->bus, | |
180 | (hp_slot + ctrl->slot_device_offset), 0); | |
181 | ||
182 | taskInfo = &(ctrl->event_queue[ctrl->next_event]); | |
183 | ctrl->next_event = (ctrl->next_event + 1) % 10; | |
184 | taskInfo->hp_slot = hp_slot; | |
185 | ||
186 | rc++; | |
187 | ||
188 | p_slot = cpqhp_find_slot(ctrl, hp_slot + (readb(ctrl->hpc_reg + SLOT_MASK) >> 4)); | |
189 | if (!p_slot) | |
190 | return 0; | |
191 | ||
192 | /* If the switch closed, must be a button | |
193 | * If not in button mode, nevermind */ | |
194 | if (func->switch_save && (ctrl->push_button == 1)) { | |
195 | temp_word = ctrl->ctrl_int_comp >> 16; | |
196 | temp_byte = (temp_word >> hp_slot) & 0x01; | |
197 | temp_byte |= (temp_word >> (hp_slot + 7)) & 0x02; | |
198 | ||
199 | if (temp_byte != func->presence_save) { | |
200 | /************************************** | |
201 | * button Pressed (doesn't do anything) | |
202 | **************************************/ | |
203 | dbg("hp_slot %d button pressed\n", hp_slot); | |
204 | taskInfo->event_type = INT_BUTTON_PRESS; | |
205 | } else { | |
206 | /********************************** | |
207 | * button Released - TAKE ACTION!!!! | |
208 | **********************************/ | |
209 | dbg("hp_slot %d button released\n", hp_slot); | |
210 | taskInfo->event_type = INT_BUTTON_RELEASE; | |
211 | ||
212 | /* Cancel if we are still blinking */ | |
213 | if ((p_slot->state == BLINKINGON_STATE) | |
214 | || (p_slot->state == BLINKINGOFF_STATE)) { | |
215 | taskInfo->event_type = INT_BUTTON_CANCEL; | |
216 | dbg("hp_slot %d button cancel\n", hp_slot); | |
217 | } else if ((p_slot->state == POWERON_STATE) | |
218 | || (p_slot->state == POWEROFF_STATE)) { | |
219 | /* info(msg_button_ignore, p_slot->number); */ | |
220 | taskInfo->event_type = INT_BUTTON_IGNORE; | |
221 | dbg("hp_slot %d button ignore\n", hp_slot); | |
222 | } | |
223 | } | |
224 | } else { | |
225 | /* Switch is open, assume a presence change | |
226 | * Save the presence state */ | |
227 | temp_word = ctrl->ctrl_int_comp >> 16; | |
228 | func->presence_save = (temp_word >> hp_slot) & 0x01; | |
229 | func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02; | |
230 | ||
231 | if ((!(ctrl->ctrl_int_comp & (0x010000 << hp_slot))) || | |
232 | (!(ctrl->ctrl_int_comp & (0x01000000 << hp_slot)))) { | |
233 | /* Present */ | |
234 | taskInfo->event_type = INT_PRESENCE_ON; | |
235 | } else { | |
236 | /* Not Present */ | |
237 | taskInfo->event_type = INT_PRESENCE_OFF; | |
238 | } | |
239 | } | |
240 | } | |
241 | } | |
242 | ||
243 | return rc; | |
244 | } | |
245 | ||
246 | ||
247 | static u8 handle_power_fault(u8 change, struct controller * ctrl) | |
248 | { | |
249 | int hp_slot; | |
250 | u8 rc = 0; | |
251 | struct pci_func *func; | |
252 | struct event_info *taskInfo; | |
253 | ||
254 | if (!change) | |
255 | return 0; | |
256 | ||
257 | /********************************** | |
258 | * power fault | |
259 | **********************************/ | |
260 | ||
261 | info("power fault interrupt\n"); | |
262 | ||
263 | for (hp_slot = 0; hp_slot < 6; hp_slot++) { | |
264 | if (change & (0x01 << hp_slot)) { | |
265 | /********************************** | |
266 | * this one changed. | |
267 | **********************************/ | |
268 | func = cpqhp_slot_find(ctrl->bus, | |
269 | (hp_slot + ctrl->slot_device_offset), 0); | |
270 | ||
271 | taskInfo = &(ctrl->event_queue[ctrl->next_event]); | |
272 | ctrl->next_event = (ctrl->next_event + 1) % 10; | |
273 | taskInfo->hp_slot = hp_slot; | |
274 | ||
275 | rc++; | |
276 | ||
277 | if (ctrl->ctrl_int_comp & (0x00000100 << hp_slot)) { | |
278 | /********************************** | |
279 | * power fault Cleared | |
280 | **********************************/ | |
281 | func->status = 0x00; | |
282 | ||
283 | taskInfo->event_type = INT_POWER_FAULT_CLEAR; | |
284 | } else { | |
285 | /********************************** | |
286 | * power fault | |
287 | **********************************/ | |
288 | taskInfo->event_type = INT_POWER_FAULT; | |
289 | ||
290 | if (ctrl->rev < 4) { | |
291 | amber_LED_on (ctrl, hp_slot); | |
292 | green_LED_off (ctrl, hp_slot); | |
293 | set_SOGO (ctrl); | |
294 | ||
295 | /* this is a fatal condition, we want | |
296 | * to crash the machine to protect from | |
297 | * data corruption. simulated_NMI | |
298 | * shouldn't ever return */ | |
299 | /* FIXME | |
300 | simulated_NMI(hp_slot, ctrl); */ | |
301 | ||
302 | /* The following code causes a software | |
303 | * crash just in case simulated_NMI did | |
304 | * return */ | |
305 | /*FIXME | |
306 | panic(msg_power_fault); */ | |
307 | } else { | |
308 | /* set power fault status for this board */ | |
309 | func->status = 0xFF; | |
310 | info("power fault bit %x set\n", hp_slot); | |
311 | } | |
312 | } | |
313 | } | |
314 | } | |
315 | ||
316 | return rc; | |
317 | } | |
318 | ||
319 | ||
320 | /** | |
321 | * sort_by_size: sort nodes on the list by their length, smallest first. | |
322 | * @head: list to sort | |
323 | * | |
324 | */ | |
325 | static int sort_by_size(struct pci_resource **head) | |
326 | { | |
327 | struct pci_resource *current_res; | |
328 | struct pci_resource *next_res; | |
329 | int out_of_order = 1; | |
330 | ||
331 | if (!(*head)) | |
332 | return 1; | |
333 | ||
334 | if (!((*head)->next)) | |
335 | return 0; | |
336 | ||
337 | while (out_of_order) { | |
338 | out_of_order = 0; | |
339 | ||
340 | /* Special case for swapping list head */ | |
341 | if (((*head)->next) && | |
342 | ((*head)->length > (*head)->next->length)) { | |
343 | out_of_order++; | |
344 | current_res = *head; | |
345 | *head = (*head)->next; | |
346 | current_res->next = (*head)->next; | |
347 | (*head)->next = current_res; | |
348 | } | |
349 | ||
350 | current_res = *head; | |
351 | ||
352 | while (current_res->next && current_res->next->next) { | |
353 | if (current_res->next->length > current_res->next->next->length) { | |
354 | out_of_order++; | |
355 | next_res = current_res->next; | |
356 | current_res->next = current_res->next->next; | |
357 | current_res = current_res->next; | |
358 | next_res->next = current_res->next; | |
359 | current_res->next = next_res; | |
360 | } else | |
361 | current_res = current_res->next; | |
362 | } | |
363 | } /* End of out_of_order loop */ | |
364 | ||
365 | return 0; | |
366 | } | |
367 | ||
368 | ||
369 | /** | |
370 | * sort_by_max_size: sort nodes on the list by their length, largest first. | |
371 | * @head: list to sort | |
372 | * | |
373 | */ | |
374 | static int sort_by_max_size(struct pci_resource **head) | |
375 | { | |
376 | struct pci_resource *current_res; | |
377 | struct pci_resource *next_res; | |
378 | int out_of_order = 1; | |
379 | ||
380 | if (!(*head)) | |
381 | return 1; | |
382 | ||
383 | if (!((*head)->next)) | |
384 | return 0; | |
385 | ||
386 | while (out_of_order) { | |
387 | out_of_order = 0; | |
388 | ||
389 | /* Special case for swapping list head */ | |
390 | if (((*head)->next) && | |
391 | ((*head)->length < (*head)->next->length)) { | |
392 | out_of_order++; | |
393 | current_res = *head; | |
394 | *head = (*head)->next; | |
395 | current_res->next = (*head)->next; | |
396 | (*head)->next = current_res; | |
397 | } | |
398 | ||
399 | current_res = *head; | |
400 | ||
401 | while (current_res->next && current_res->next->next) { | |
402 | if (current_res->next->length < current_res->next->next->length) { | |
403 | out_of_order++; | |
404 | next_res = current_res->next; | |
405 | current_res->next = current_res->next->next; | |
406 | current_res = current_res->next; | |
407 | next_res->next = current_res->next; | |
408 | current_res->next = next_res; | |
409 | } else | |
410 | current_res = current_res->next; | |
411 | } | |
412 | } /* End of out_of_order loop */ | |
413 | ||
414 | return 0; | |
415 | } | |
416 | ||
417 | ||
418 | /** | |
419 | * do_pre_bridge_resource_split: find node of resources that are unused | |
420 | * | |
421 | */ | |
422 | static struct pci_resource *do_pre_bridge_resource_split(struct pci_resource **head, | |
423 | struct pci_resource **orig_head, u32 alignment) | |
424 | { | |
425 | struct pci_resource *prevnode = NULL; | |
426 | struct pci_resource *node; | |
427 | struct pci_resource *split_node; | |
428 | u32 rc; | |
429 | u32 temp_dword; | |
430 | dbg("do_pre_bridge_resource_split\n"); | |
431 | ||
432 | if (!(*head) || !(*orig_head)) | |
433 | return NULL; | |
434 | ||
435 | rc = cpqhp_resource_sort_and_combine(head); | |
436 | ||
437 | if (rc) | |
438 | return NULL; | |
439 | ||
440 | if ((*head)->base != (*orig_head)->base) | |
441 | return NULL; | |
442 | ||
443 | if ((*head)->length == (*orig_head)->length) | |
444 | return NULL; | |
445 | ||
446 | ||
447 | /* If we got here, there the bridge requires some of the resource, but | |
448 | * we may be able to split some off of the front */ | |
449 | ||
450 | node = *head; | |
451 | ||
452 | if (node->length & (alignment -1)) { | |
453 | /* this one isn't an aligned length, so we'll make a new entry | |
454 | * and split it up. */ | |
455 | split_node = kmalloc(sizeof(*split_node), GFP_KERNEL); | |
456 | ||
457 | if (!split_node) | |
458 | return NULL; | |
459 | ||
460 | temp_dword = (node->length | (alignment-1)) + 1 - alignment; | |
461 | ||
462 | split_node->base = node->base; | |
463 | split_node->length = temp_dword; | |
464 | ||
465 | node->length -= temp_dword; | |
466 | node->base += split_node->length; | |
467 | ||
468 | /* Put it in the list */ | |
469 | *head = split_node; | |
470 | split_node->next = node; | |
471 | } | |
472 | ||
473 | if (node->length < alignment) | |
474 | return NULL; | |
475 | ||
476 | /* Now unlink it */ | |
477 | if (*head == node) { | |
478 | *head = node->next; | |
479 | } else { | |
480 | prevnode = *head; | |
481 | while (prevnode->next != node) | |
482 | prevnode = prevnode->next; | |
483 | ||
484 | prevnode->next = node->next; | |
485 | } | |
486 | node->next = NULL; | |
487 | ||
488 | return node; | |
489 | } | |
490 | ||
491 | ||
492 | /** | |
493 | * do_bridge_resource_split: find one node of resources that aren't in use | |
494 | * | |
495 | */ | |
496 | static struct pci_resource *do_bridge_resource_split(struct pci_resource **head, u32 alignment) | |
497 | { | |
498 | struct pci_resource *prevnode = NULL; | |
499 | struct pci_resource *node; | |
500 | u32 rc; | |
501 | u32 temp_dword; | |
502 | ||
503 | rc = cpqhp_resource_sort_and_combine(head); | |
504 | ||
505 | if (rc) | |
506 | return NULL; | |
507 | ||
508 | node = *head; | |
509 | ||
510 | while (node->next) { | |
511 | prevnode = node; | |
512 | node = node->next; | |
513 | kfree(prevnode); | |
514 | } | |
515 | ||
516 | if (node->length < alignment) | |
517 | goto error; | |
518 | ||
519 | if (node->base & (alignment - 1)) { | |
520 | /* Short circuit if adjusted size is too small */ | |
521 | temp_dword = (node->base | (alignment-1)) + 1; | |
522 | if ((node->length - (temp_dword - node->base)) < alignment) | |
523 | goto error; | |
524 | ||
525 | node->length -= (temp_dword - node->base); | |
526 | node->base = temp_dword; | |
527 | } | |
528 | ||
529 | if (node->length & (alignment - 1)) | |
530 | /* There's stuff in use after this node */ | |
531 | goto error; | |
532 | ||
533 | return node; | |
534 | error: | |
535 | kfree(node); | |
536 | return NULL; | |
537 | } | |
538 | ||
539 | ||
540 | /** | |
541 | * get_io_resource: find first node of given size not in ISA aliasing window. | |
542 | * @head: list to search | |
543 | * @size: size of node to find, must be a power of two. | |
544 | * | |
545 | * Description: this function sorts the resource list by size and then returns | |
546 | * returns the first node of "size" length that is not in the ISA aliasing | |
547 | * window. If it finds a node larger than "size" it will split it up. | |
548 | * | |
549 | */ | |
550 | static struct pci_resource *get_io_resource(struct pci_resource **head, u32 size) | |
551 | { | |
552 | struct pci_resource *prevnode; | |
553 | struct pci_resource *node; | |
554 | struct pci_resource *split_node; | |
555 | u32 temp_dword; | |
556 | ||
557 | if (!(*head)) | |
558 | return NULL; | |
559 | ||
560 | if ( cpqhp_resource_sort_and_combine(head) ) | |
561 | return NULL; | |
562 | ||
563 | if ( sort_by_size(head) ) | |
564 | return NULL; | |
565 | ||
566 | for (node = *head; node; node = node->next) { | |
567 | if (node->length < size) | |
568 | continue; | |
569 | ||
570 | if (node->base & (size - 1)) { | |
571 | /* this one isn't base aligned properly | |
572 | * so we'll make a new entry and split it up */ | |
573 | temp_dword = (node->base | (size-1)) + 1; | |
574 | ||
575 | /* Short circuit if adjusted size is too small */ | |
576 | if ((node->length - (temp_dword - node->base)) < size) | |
577 | continue; | |
578 | ||
579 | split_node = kmalloc(sizeof(*split_node), GFP_KERNEL); | |
580 | ||
581 | if (!split_node) | |
582 | return NULL; | |
583 | ||
584 | split_node->base = node->base; | |
585 | split_node->length = temp_dword - node->base; | |
586 | node->base = temp_dword; | |
587 | node->length -= split_node->length; | |
588 | ||
589 | /* Put it in the list */ | |
590 | split_node->next = node->next; | |
591 | node->next = split_node; | |
592 | } /* End of non-aligned base */ | |
593 | ||
594 | /* Don't need to check if too small since we already did */ | |
595 | if (node->length > size) { | |
596 | /* this one is longer than we need | |
597 | * so we'll make a new entry and split it up */ | |
598 | split_node = kmalloc(sizeof(*split_node), GFP_KERNEL); | |
599 | ||
600 | if (!split_node) | |
601 | return NULL; | |
602 | ||
603 | split_node->base = node->base + size; | |
604 | split_node->length = node->length - size; | |
605 | node->length = size; | |
606 | ||
607 | /* Put it in the list */ | |
608 | split_node->next = node->next; | |
609 | node->next = split_node; | |
610 | } /* End of too big on top end */ | |
611 | ||
612 | /* For IO make sure it's not in the ISA aliasing space */ | |
613 | if (node->base & 0x300L) | |
614 | continue; | |
615 | ||
616 | /* If we got here, then it is the right size | |
617 | * Now take it out of the list and break */ | |
618 | if (*head == node) { | |
619 | *head = node->next; | |
620 | } else { | |
621 | prevnode = *head; | |
622 | while (prevnode->next != node) | |
623 | prevnode = prevnode->next; | |
624 | ||
625 | prevnode->next = node->next; | |
626 | } | |
627 | node->next = NULL; | |
628 | break; | |
629 | } | |
630 | ||
631 | return node; | |
632 | } | |
633 | ||
634 | ||
635 | /** | |
636 | * get_max_resource: get largest node which has at least the given size. | |
637 | * @head: the list to search the node in | |
638 | * @size: the minimum size of the node to find | |
639 | * | |
640 | * Description: Gets the largest node that is at least "size" big from the | |
641 | * list pointed to by head. It aligns the node on top and bottom | |
642 | * to "size" alignment before returning it. | |
643 | */ | |
644 | static struct pci_resource *get_max_resource(struct pci_resource **head, u32 size) | |
645 | { | |
646 | struct pci_resource *max; | |
647 | struct pci_resource *temp; | |
648 | struct pci_resource *split_node; | |
649 | u32 temp_dword; | |
650 | ||
651 | if (cpqhp_resource_sort_and_combine(head)) | |
652 | return NULL; | |
653 | ||
654 | if (sort_by_max_size(head)) | |
655 | return NULL; | |
656 | ||
657 | for (max = *head; max; max = max->next) { | |
658 | /* If not big enough we could probably just bail, | |
659 | * instead we'll continue to the next. */ | |
660 | if (max->length < size) | |
661 | continue; | |
662 | ||
663 | if (max->base & (size - 1)) { | |
664 | /* this one isn't base aligned properly | |
665 | * so we'll make a new entry and split it up */ | |
666 | temp_dword = (max->base | (size-1)) + 1; | |
667 | ||
668 | /* Short circuit if adjusted size is too small */ | |
669 | if ((max->length - (temp_dword - max->base)) < size) | |
670 | continue; | |
671 | ||
672 | split_node = kmalloc(sizeof(*split_node), GFP_KERNEL); | |
673 | ||
674 | if (!split_node) | |
675 | return NULL; | |
676 | ||
677 | split_node->base = max->base; | |
678 | split_node->length = temp_dword - max->base; | |
679 | max->base = temp_dword; | |
680 | max->length -= split_node->length; | |
681 | ||
682 | split_node->next = max->next; | |
683 | max->next = split_node; | |
684 | } | |
685 | ||
686 | if ((max->base + max->length) & (size - 1)) { | |
687 | /* this one isn't end aligned properly at the top | |
688 | * so we'll make a new entry and split it up */ | |
689 | split_node = kmalloc(sizeof(*split_node), GFP_KERNEL); | |
690 | ||
691 | if (!split_node) | |
692 | return NULL; | |
693 | temp_dword = ((max->base + max->length) & ~(size - 1)); | |
694 | split_node->base = temp_dword; | |
695 | split_node->length = max->length + max->base | |
696 | - split_node->base; | |
697 | max->length -= split_node->length; | |
698 | ||
699 | split_node->next = max->next; | |
700 | max->next = split_node; | |
701 | } | |
702 | ||
703 | /* Make sure it didn't shrink too much when we aligned it */ | |
704 | if (max->length < size) | |
705 | continue; | |
706 | ||
707 | /* Now take it out of the list */ | |
708 | temp = *head; | |
709 | if (temp == max) { | |
710 | *head = max->next; | |
711 | } else { | |
712 | while (temp && temp->next != max) { | |
713 | temp = temp->next; | |
714 | } | |
715 | ||
716 | temp->next = max->next; | |
717 | } | |
718 | ||
719 | max->next = NULL; | |
720 | break; | |
721 | } | |
722 | ||
723 | return max; | |
724 | } | |
725 | ||
726 | ||
727 | /** | |
728 | * get_resource: find resource of given size and split up larger ones. | |
729 | * @head: the list to search for resources | |
730 | * @size: the size limit to use | |
731 | * | |
732 | * Description: This function sorts the resource list by size and then | |
733 | * returns the first node of "size" length. If it finds a node | |
734 | * larger than "size" it will split it up. | |
735 | * | |
736 | * size must be a power of two. | |
737 | */ | |
738 | static struct pci_resource *get_resource(struct pci_resource **head, u32 size) | |
739 | { | |
740 | struct pci_resource *prevnode; | |
741 | struct pci_resource *node; | |
742 | struct pci_resource *split_node; | |
743 | u32 temp_dword; | |
744 | ||
745 | if (cpqhp_resource_sort_and_combine(head)) | |
746 | return NULL; | |
747 | ||
748 | if (sort_by_size(head)) | |
749 | return NULL; | |
750 | ||
751 | for (node = *head; node; node = node->next) { | |
752 | dbg("%s: req_size =%x node=%p, base=%x, length=%x\n", | |
753 | __FUNCTION__, size, node, node->base, node->length); | |
754 | if (node->length < size) | |
755 | continue; | |
756 | ||
757 | if (node->base & (size - 1)) { | |
758 | dbg("%s: not aligned\n", __FUNCTION__); | |
759 | /* this one isn't base aligned properly | |
760 | * so we'll make a new entry and split it up */ | |
761 | temp_dword = (node->base | (size-1)) + 1; | |
762 | ||
763 | /* Short circuit if adjusted size is too small */ | |
764 | if ((node->length - (temp_dword - node->base)) < size) | |
765 | continue; | |
766 | ||
767 | split_node = kmalloc(sizeof(*split_node), GFP_KERNEL); | |
768 | ||
769 | if (!split_node) | |
770 | return NULL; | |
771 | ||
772 | split_node->base = node->base; | |
773 | split_node->length = temp_dword - node->base; | |
774 | node->base = temp_dword; | |
775 | node->length -= split_node->length; | |
776 | ||
777 | split_node->next = node->next; | |
778 | node->next = split_node; | |
779 | } /* End of non-aligned base */ | |
780 | ||
781 | /* Don't need to check if too small since we already did */ | |
782 | if (node->length > size) { | |
783 | dbg("%s: too big\n", __FUNCTION__); | |
784 | /* this one is longer than we need | |
785 | * so we'll make a new entry and split it up */ | |
786 | split_node = kmalloc(sizeof(*split_node), GFP_KERNEL); | |
787 | ||
788 | if (!split_node) | |
789 | return NULL; | |
790 | ||
791 | split_node->base = node->base + size; | |
792 | split_node->length = node->length - size; | |
793 | node->length = size; | |
794 | ||
795 | /* Put it in the list */ | |
796 | split_node->next = node->next; | |
797 | node->next = split_node; | |
798 | } /* End of too big on top end */ | |
799 | ||
800 | dbg("%s: got one!!!\n", __FUNCTION__); | |
801 | /* If we got here, then it is the right size | |
802 | * Now take it out of the list */ | |
803 | if (*head == node) { | |
804 | *head = node->next; | |
805 | } else { | |
806 | prevnode = *head; | |
807 | while (prevnode->next != node) | |
808 | prevnode = prevnode->next; | |
809 | ||
810 | prevnode->next = node->next; | |
811 | } | |
812 | node->next = NULL; | |
813 | break; | |
814 | } | |
815 | return node; | |
816 | } | |
817 | ||
818 | ||
819 | /** | |
820 | * cpqhp_resource_sort_and_combine: sort nodes by base addresses and clean up. | |
821 | * @head: the list to sort and clean up | |
822 | * | |
823 | * Description: Sorts all of the nodes in the list in ascending order by | |
824 | * their base addresses. Also does garbage collection by | |
825 | * combining adjacent nodes. | |
826 | * | |
827 | * returns 0 if success | |
828 | */ | |
829 | int cpqhp_resource_sort_and_combine(struct pci_resource **head) | |
830 | { | |
831 | struct pci_resource *node1; | |
832 | struct pci_resource *node2; | |
833 | int out_of_order = 1; | |
834 | ||
835 | dbg("%s: head = %p, *head = %p\n", __FUNCTION__, head, *head); | |
836 | ||
837 | if (!(*head)) | |
838 | return 1; | |
839 | ||
840 | dbg("*head->next = %p\n",(*head)->next); | |
841 | ||
842 | if (!(*head)->next) | |
843 | return 0; /* only one item on the list, already sorted! */ | |
844 | ||
845 | dbg("*head->base = 0x%x\n",(*head)->base); | |
846 | dbg("*head->next->base = 0x%x\n",(*head)->next->base); | |
847 | while (out_of_order) { | |
848 | out_of_order = 0; | |
849 | ||
850 | /* Special case for swapping list head */ | |
851 | if (((*head)->next) && | |
852 | ((*head)->base > (*head)->next->base)) { | |
853 | node1 = *head; | |
854 | (*head) = (*head)->next; | |
855 | node1->next = (*head)->next; | |
856 | (*head)->next = node1; | |
857 | out_of_order++; | |
858 | } | |
859 | ||
860 | node1 = (*head); | |
861 | ||
862 | while (node1->next && node1->next->next) { | |
863 | if (node1->next->base > node1->next->next->base) { | |
864 | out_of_order++; | |
865 | node2 = node1->next; | |
866 | node1->next = node1->next->next; | |
867 | node1 = node1->next; | |
868 | node2->next = node1->next; | |
869 | node1->next = node2; | |
870 | } else | |
871 | node1 = node1->next; | |
872 | } | |
873 | } /* End of out_of_order loop */ | |
874 | ||
875 | node1 = *head; | |
876 | ||
877 | while (node1 && node1->next) { | |
878 | if ((node1->base + node1->length) == node1->next->base) { | |
879 | /* Combine */ | |
880 | dbg("8..\n"); | |
881 | node1->length += node1->next->length; | |
882 | node2 = node1->next; | |
883 | node1->next = node1->next->next; | |
884 | kfree(node2); | |
885 | } else | |
886 | node1 = node1->next; | |
887 | } | |
888 | ||
889 | return 0; | |
890 | } | |
891 | ||
892 | ||
7d12e780 | 893 | irqreturn_t cpqhp_ctrl_intr(int IRQ, void *data) |
1da177e4 LT |
894 | { |
895 | struct controller *ctrl = data; | |
896 | u8 schedule_flag = 0; | |
897 | u8 reset; | |
898 | u16 misc; | |
899 | u32 Diff; | |
900 | u32 temp_dword; | |
901 | ||
902 | ||
903 | misc = readw(ctrl->hpc_reg + MISC); | |
904 | /*************************************** | |
905 | * Check to see if it was our interrupt | |
906 | ***************************************/ | |
907 | if (!(misc & 0x000C)) { | |
908 | return IRQ_NONE; | |
909 | } | |
910 | ||
911 | if (misc & 0x0004) { | |
912 | /********************************** | |
913 | * Serial Output interrupt Pending | |
914 | **********************************/ | |
915 | ||
916 | /* Clear the interrupt */ | |
917 | misc |= 0x0004; | |
918 | writew(misc, ctrl->hpc_reg + MISC); | |
919 | ||
920 | /* Read to clear posted writes */ | |
921 | misc = readw(ctrl->hpc_reg + MISC); | |
922 | ||
923 | dbg ("%s - waking up\n", __FUNCTION__); | |
924 | wake_up_interruptible(&ctrl->queue); | |
925 | } | |
926 | ||
927 | if (misc & 0x0008) { | |
928 | /* General-interrupt-input interrupt Pending */ | |
929 | Diff = readl(ctrl->hpc_reg + INT_INPUT_CLEAR) ^ ctrl->ctrl_int_comp; | |
930 | ||
931 | ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR); | |
932 | ||
933 | /* Clear the interrupt */ | |
934 | writel(Diff, ctrl->hpc_reg + INT_INPUT_CLEAR); | |
935 | ||
936 | /* Read it back to clear any posted writes */ | |
937 | temp_dword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR); | |
938 | ||
939 | if (!Diff) | |
940 | /* Clear all interrupts */ | |
941 | writel(0xFFFFFFFF, ctrl->hpc_reg + INT_INPUT_CLEAR); | |
942 | ||
943 | schedule_flag += handle_switch_change((u8)(Diff & 0xFFL), ctrl); | |
944 | schedule_flag += handle_presence_change((u16)((Diff & 0xFFFF0000L) >> 16), ctrl); | |
945 | schedule_flag += handle_power_fault((u8)((Diff & 0xFF00L) >> 8), ctrl); | |
946 | } | |
947 | ||
948 | reset = readb(ctrl->hpc_reg + RESET_FREQ_MODE); | |
949 | if (reset & 0x40) { | |
950 | /* Bus reset has completed */ | |
951 | reset &= 0xCF; | |
952 | writeb(reset, ctrl->hpc_reg + RESET_FREQ_MODE); | |
953 | reset = readb(ctrl->hpc_reg + RESET_FREQ_MODE); | |
954 | wake_up_interruptible(&ctrl->queue); | |
955 | } | |
956 | ||
957 | if (schedule_flag) { | |
958 | up(&event_semaphore); | |
959 | dbg("Signal event_semaphore\n"); | |
960 | } | |
961 | return IRQ_HANDLED; | |
962 | } | |
963 | ||
964 | ||
965 | /** | |
966 | * cpqhp_slot_create - Creates a node and adds it to the proper bus. | |
967 | * @busnumber - bus where new node is to be located | |
968 | * | |
969 | * Returns pointer to the new node or NULL if unsuccessful | |
970 | */ | |
971 | struct pci_func *cpqhp_slot_create(u8 busnumber) | |
972 | { | |
973 | struct pci_func *new_slot; | |
974 | struct pci_func *next; | |
975 | ||
976 | new_slot = kmalloc(sizeof(*new_slot), GFP_KERNEL); | |
977 | ||
978 | if (new_slot == NULL) { | |
979 | /* I'm not dead yet! | |
980 | * You will be. */ | |
981 | return new_slot; | |
982 | } | |
983 | ||
984 | memset(new_slot, 0, sizeof(struct pci_func)); | |
985 | ||
986 | new_slot->next = NULL; | |
987 | new_slot->configured = 1; | |
988 | ||
989 | if (cpqhp_slot_list[busnumber] == NULL) { | |
990 | cpqhp_slot_list[busnumber] = new_slot; | |
991 | } else { | |
992 | next = cpqhp_slot_list[busnumber]; | |
993 | while (next->next != NULL) | |
994 | next = next->next; | |
995 | next->next = new_slot; | |
996 | } | |
997 | return new_slot; | |
998 | } | |
999 | ||
1000 | ||
1001 | /** | |
1002 | * slot_remove - Removes a node from the linked list of slots. | |
1003 | * @old_slot: slot to remove | |
1004 | * | |
1005 | * Returns 0 if successful, !0 otherwise. | |
1006 | */ | |
1007 | static int slot_remove(struct pci_func * old_slot) | |
1008 | { | |
1009 | struct pci_func *next; | |
1010 | ||
1011 | if (old_slot == NULL) | |
1012 | return 1; | |
1013 | ||
1014 | next = cpqhp_slot_list[old_slot->bus]; | |
1015 | ||
1016 | if (next == NULL) { | |
1017 | return 1; | |
1018 | } | |
1019 | ||
1020 | if (next == old_slot) { | |
1021 | cpqhp_slot_list[old_slot->bus] = old_slot->next; | |
1022 | cpqhp_destroy_board_resources(old_slot); | |
1023 | kfree(old_slot); | |
1024 | return 0; | |
1025 | } | |
1026 | ||
1027 | while ((next->next != old_slot) && (next->next != NULL)) { | |
1028 | next = next->next; | |
1029 | } | |
1030 | ||
1031 | if (next->next == old_slot) { | |
1032 | next->next = old_slot->next; | |
1033 | cpqhp_destroy_board_resources(old_slot); | |
1034 | kfree(old_slot); | |
1035 | return 0; | |
1036 | } else | |
1037 | return 2; | |
1038 | } | |
1039 | ||
1040 | ||
1041 | /** | |
1042 | * bridge_slot_remove - Removes a node from the linked list of slots. | |
1043 | * @bridge: bridge to remove | |
1044 | * | |
1045 | * Returns 0 if successful, !0 otherwise. | |
1046 | */ | |
1047 | static int bridge_slot_remove(struct pci_func *bridge) | |
1048 | { | |
1049 | u8 subordinateBus, secondaryBus; | |
1050 | u8 tempBus; | |
1051 | struct pci_func *next; | |
1052 | ||
1053 | secondaryBus = (bridge->config_space[0x06] >> 8) & 0xFF; | |
1054 | subordinateBus = (bridge->config_space[0x06] >> 16) & 0xFF; | |
1055 | ||
1056 | for (tempBus = secondaryBus; tempBus <= subordinateBus; tempBus++) { | |
1057 | next = cpqhp_slot_list[tempBus]; | |
1058 | ||
1059 | while (!slot_remove(next)) { | |
1060 | next = cpqhp_slot_list[tempBus]; | |
1061 | } | |
1062 | } | |
1063 | ||
1064 | next = cpqhp_slot_list[bridge->bus]; | |
1065 | ||
1066 | if (next == NULL) | |
1067 | return 1; | |
1068 | ||
1069 | if (next == bridge) { | |
1070 | cpqhp_slot_list[bridge->bus] = bridge->next; | |
1071 | goto out; | |
1072 | } | |
1073 | ||
1074 | while ((next->next != bridge) && (next->next != NULL)) | |
1075 | next = next->next; | |
1076 | ||
1077 | if (next->next != bridge) | |
1078 | return 2; | |
1079 | next->next = bridge->next; | |
1080 | out: | |
1081 | kfree(bridge); | |
1082 | return 0; | |
1083 | } | |
1084 | ||
1085 | ||
1086 | /** | |
1087 | * cpqhp_slot_find - Looks for a node by bus, and device, multiple functions accessed | |
1088 | * @bus: bus to find | |
1089 | * @device: device to find | |
1090 | * @index: is 0 for first function found, 1 for the second... | |
1091 | * | |
1092 | * Returns pointer to the node if successful, %NULL otherwise. | |
1093 | */ | |
1094 | struct pci_func *cpqhp_slot_find(u8 bus, u8 device, u8 index) | |
1095 | { | |
1096 | int found = -1; | |
1097 | struct pci_func *func; | |
1098 | ||
1099 | func = cpqhp_slot_list[bus]; | |
1100 | ||
1101 | if ((func == NULL) || ((func->device == device) && (index == 0))) | |
1102 | return func; | |
1103 | ||
1104 | if (func->device == device) | |
1105 | found++; | |
1106 | ||
1107 | while (func->next != NULL) { | |
1108 | func = func->next; | |
1109 | ||
1110 | if (func->device == device) | |
1111 | found++; | |
1112 | ||
1113 | if (found == index) | |
1114 | return func; | |
1115 | } | |
1116 | ||
1117 | return NULL; | |
1118 | } | |
1119 | ||
1120 | ||
1121 | /* DJZ: I don't think is_bridge will work as is. | |
1122 | * FIXME */ | |
1123 | static int is_bridge(struct pci_func * func) | |
1124 | { | |
1125 | /* Check the header type */ | |
1126 | if (((func->config_space[0x03] >> 16) & 0xFF) == 0x01) | |
1127 | return 1; | |
1128 | else | |
1129 | return 0; | |
1130 | } | |
1131 | ||
1132 | ||
1133 | /** | |
1134 | * set_controller_speed - set the frequency and/or mode of a specific | |
1135 | * controller segment. | |
1136 | * | |
1137 | * @ctrl: controller to change frequency/mode for. | |
1138 | * @adapter_speed: the speed of the adapter we want to match. | |
1139 | * @hp_slot: the slot number where the adapter is installed. | |
1140 | * | |
1141 | * Returns 0 if we successfully change frequency and/or mode to match the | |
1142 | * adapter speed. | |
1143 | * | |
1144 | */ | |
1145 | static u8 set_controller_speed(struct controller *ctrl, u8 adapter_speed, u8 hp_slot) | |
1146 | { | |
1147 | struct slot *slot; | |
1148 | u8 reg; | |
1149 | u8 slot_power = readb(ctrl->hpc_reg + SLOT_POWER); | |
1150 | u16 reg16; | |
1151 | u32 leds = readl(ctrl->hpc_reg + LED_CONTROL); | |
1152 | ||
1153 | if (ctrl->speed == adapter_speed) | |
1154 | return 0; | |
1155 | ||
1156 | /* We don't allow freq/mode changes if we find another adapter running | |
1157 | * in another slot on this controller */ | |
1158 | for(slot = ctrl->slot; slot; slot = slot->next) { | |
1159 | if (slot->device == (hp_slot + ctrl->slot_device_offset)) | |
1160 | continue; | |
1161 | if (!slot->hotplug_slot && !slot->hotplug_slot->info) | |
1162 | continue; | |
1163 | if (slot->hotplug_slot->info->adapter_status == 0) | |
1164 | continue; | |
1165 | /* If another adapter is running on the same segment but at a | |
1166 | * lower speed/mode, we allow the new adapter to function at | |
1167 | * this rate if supported */ | |
1168 | if (ctrl->speed < adapter_speed) | |
1169 | return 0; | |
1170 | ||
1171 | return 1; | |
1172 | } | |
1173 | ||
1174 | /* If the controller doesn't support freq/mode changes and the | |
1175 | * controller is running at a higher mode, we bail */ | |
1176 | if ((ctrl->speed > adapter_speed) && (!ctrl->pcix_speed_capability)) | |
1177 | return 1; | |
1178 | ||
1179 | /* But we allow the adapter to run at a lower rate if possible */ | |
1180 | if ((ctrl->speed < adapter_speed) && (!ctrl->pcix_speed_capability)) | |
1181 | return 0; | |
1182 | ||
1183 | /* We try to set the max speed supported by both the adapter and | |
1184 | * controller */ | |
1185 | if (ctrl->speed_capability < adapter_speed) { | |
1186 | if (ctrl->speed == ctrl->speed_capability) | |
1187 | return 0; | |
1188 | adapter_speed = ctrl->speed_capability; | |
1189 | } | |
1190 | ||
1191 | writel(0x0L, ctrl->hpc_reg + LED_CONTROL); | |
1192 | writeb(0x00, ctrl->hpc_reg + SLOT_ENABLE); | |
1193 | ||
1194 | set_SOGO(ctrl); | |
1195 | wait_for_ctrl_irq(ctrl); | |
1196 | ||
1197 | if (adapter_speed != PCI_SPEED_133MHz_PCIX) | |
1198 | reg = 0xF5; | |
1199 | else | |
1200 | reg = 0xF4; | |
1201 | pci_write_config_byte(ctrl->pci_dev, 0x41, reg); | |
1202 | ||
1203 | reg16 = readw(ctrl->hpc_reg + NEXT_CURR_FREQ); | |
1204 | reg16 &= ~0x000F; | |
1205 | switch(adapter_speed) { | |
1206 | case(PCI_SPEED_133MHz_PCIX): | |
1207 | reg = 0x75; | |
1208 | reg16 |= 0xB; | |
1209 | break; | |
1210 | case(PCI_SPEED_100MHz_PCIX): | |
1211 | reg = 0x74; | |
1212 | reg16 |= 0xA; | |
1213 | break; | |
1214 | case(PCI_SPEED_66MHz_PCIX): | |
1215 | reg = 0x73; | |
1216 | reg16 |= 0x9; | |
1217 | break; | |
1218 | case(PCI_SPEED_66MHz): | |
1219 | reg = 0x73; | |
1220 | reg16 |= 0x1; | |
1221 | break; | |
1222 | default: /* 33MHz PCI 2.2 */ | |
1223 | reg = 0x71; | |
1224 | break; | |
1225 | ||
1226 | } | |
1227 | reg16 |= 0xB << 12; | |
1228 | writew(reg16, ctrl->hpc_reg + NEXT_CURR_FREQ); | |
1229 | ||
1230 | mdelay(5); | |
1231 | ||
1232 | /* Reenable interrupts */ | |
1233 | writel(0, ctrl->hpc_reg + INT_MASK); | |
1234 | ||
1235 | pci_write_config_byte(ctrl->pci_dev, 0x41, reg); | |
1236 | ||
1237 | /* Restart state machine */ | |
1238 | reg = ~0xF; | |
1239 | pci_read_config_byte(ctrl->pci_dev, 0x43, ®); | |
1240 | pci_write_config_byte(ctrl->pci_dev, 0x43, reg); | |
1241 | ||
1242 | /* Only if mode change...*/ | |
1243 | if (((ctrl->speed == PCI_SPEED_66MHz) && (adapter_speed == PCI_SPEED_66MHz_PCIX)) || | |
1244 | ((ctrl->speed == PCI_SPEED_66MHz_PCIX) && (adapter_speed == PCI_SPEED_66MHz))) | |
1245 | set_SOGO(ctrl); | |
1246 | ||
1247 | wait_for_ctrl_irq(ctrl); | |
1248 | mdelay(1100); | |
1249 | ||
1250 | /* Restore LED/Slot state */ | |
1251 | writel(leds, ctrl->hpc_reg + LED_CONTROL); | |
1252 | writeb(slot_power, ctrl->hpc_reg + SLOT_ENABLE); | |
1253 | ||
1254 | set_SOGO(ctrl); | |
1255 | wait_for_ctrl_irq(ctrl); | |
1256 | ||
1257 | ctrl->speed = adapter_speed; | |
1258 | slot = cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); | |
1259 | ||
1260 | info("Successfully changed frequency/mode for adapter in slot %d\n", | |
1261 | slot->number); | |
1262 | return 0; | |
1263 | } | |
1264 | ||
1265 | /* the following routines constitute the bulk of the | |
1266 | hotplug controller logic | |
1267 | */ | |
1268 | ||
1269 | ||
1270 | /** | |
1271 | * board_replaced - Called after a board has been replaced in the system. | |
1272 | * | |
1273 | * This is only used if we don't have resources for hot add | |
1274 | * Turns power on for the board | |
1275 | * Checks to see if board is the same | |
1276 | * If board is same, reconfigures it | |
1277 | * If board isn't same, turns it back off. | |
1278 | * | |
1279 | */ | |
1280 | static u32 board_replaced(struct pci_func *func, struct controller *ctrl) | |
1281 | { | |
1282 | u8 hp_slot; | |
1283 | u8 temp_byte; | |
1284 | u8 adapter_speed; | |
1da177e4 | 1285 | u32 rc = 0; |
1da177e4 LT |
1286 | |
1287 | hp_slot = func->device - ctrl->slot_device_offset; | |
1288 | ||
1289 | if (readl(ctrl->hpc_reg + INT_INPUT_CLEAR) & (0x01L << hp_slot)) { | |
1290 | /********************************** | |
1291 | * The switch is open. | |
1292 | **********************************/ | |
1293 | rc = INTERLOCK_OPEN; | |
1294 | } else if (is_slot_enabled (ctrl, hp_slot)) { | |
1295 | /********************************** | |
1296 | * The board is already on | |
1297 | **********************************/ | |
1298 | rc = CARD_FUNCTIONING; | |
1299 | } else { | |
6aa4cdd0 | 1300 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1301 | |
1302 | /* turn on board without attaching to the bus */ | |
1303 | enable_slot_power (ctrl, hp_slot); | |
1304 | ||
1305 | set_SOGO(ctrl); | |
1306 | ||
1307 | /* Wait for SOBS to be unset */ | |
1308 | wait_for_ctrl_irq (ctrl); | |
1309 | ||
1310 | /* Change bits in slot power register to force another shift out | |
1311 | * NOTE: this is to work around the timer bug */ | |
1312 | temp_byte = readb(ctrl->hpc_reg + SLOT_POWER); | |
1313 | writeb(0x00, ctrl->hpc_reg + SLOT_POWER); | |
1314 | writeb(temp_byte, ctrl->hpc_reg + SLOT_POWER); | |
1315 | ||
1316 | set_SOGO(ctrl); | |
1317 | ||
1318 | /* Wait for SOBS to be unset */ | |
1319 | wait_for_ctrl_irq (ctrl); | |
1320 | ||
1321 | adapter_speed = get_adapter_speed(ctrl, hp_slot); | |
1322 | if (ctrl->speed != adapter_speed) | |
1323 | if (set_controller_speed(ctrl, adapter_speed, hp_slot)) | |
1324 | rc = WRONG_BUS_FREQUENCY; | |
1325 | ||
1326 | /* turn off board without attaching to the bus */ | |
1327 | disable_slot_power (ctrl, hp_slot); | |
1328 | ||
1329 | set_SOGO(ctrl); | |
1330 | ||
1331 | /* Wait for SOBS to be unset */ | |
1332 | wait_for_ctrl_irq (ctrl); | |
1333 | ||
6aa4cdd0 | 1334 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
1335 | |
1336 | if (rc) | |
1337 | return rc; | |
1338 | ||
6aa4cdd0 | 1339 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1340 | |
1341 | slot_enable (ctrl, hp_slot); | |
1342 | green_LED_blink (ctrl, hp_slot); | |
1343 | ||
1344 | amber_LED_off (ctrl, hp_slot); | |
1345 | ||
1346 | set_SOGO(ctrl); | |
1347 | ||
1348 | /* Wait for SOBS to be unset */ | |
1349 | wait_for_ctrl_irq (ctrl); | |
1350 | ||
6aa4cdd0 | 1351 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
1352 | |
1353 | /* Wait for ~1 second because of hot plug spec */ | |
1354 | long_delay(1*HZ); | |
1355 | ||
1356 | /* Check for a power fault */ | |
1357 | if (func->status == 0xFF) { | |
1358 | /* power fault occurred, but it was benign */ | |
1359 | rc = POWER_FAILURE; | |
1360 | func->status = 0; | |
1361 | } else | |
1362 | rc = cpqhp_valid_replace(ctrl, func); | |
1363 | ||
1364 | if (!rc) { | |
1365 | /* It must be the same board */ | |
1366 | ||
1367 | rc = cpqhp_configure_board(ctrl, func); | |
1368 | ||
1305e918 AB |
1369 | /* If configuration fails, turn it off |
1370 | * Get slot won't work for devices behind | |
1371 | * bridges, but in this case it will always be | |
1372 | * called for the "base" bus/dev/func of an | |
1373 | * adapter. */ | |
1da177e4 | 1374 | |
6aa4cdd0 | 1375 | mutex_lock(&ctrl->crit_sect); |
1da177e4 | 1376 | |
1305e918 AB |
1377 | amber_LED_on (ctrl, hp_slot); |
1378 | green_LED_off (ctrl, hp_slot); | |
1379 | slot_disable (ctrl, hp_slot); | |
1da177e4 LT |
1380 | |
1381 | set_SOGO(ctrl); | |
1382 | ||
1383 | /* Wait for SOBS to be unset */ | |
1384 | wait_for_ctrl_irq (ctrl); | |
1385 | ||
6aa4cdd0 | 1386 | mutex_unlock(&ctrl->crit_sect); |
1305e918 AB |
1387 | |
1388 | if (rc) | |
1389 | return rc; | |
1390 | else | |
1391 | return 1; | |
1392 | ||
1da177e4 LT |
1393 | } else { |
1394 | /* Something is wrong | |
1395 | ||
1396 | * Get slot won't work for devices behind bridges, but | |
1397 | * in this case it will always be called for the "base" | |
1398 | * bus/dev/func of an adapter. */ | |
1399 | ||
6aa4cdd0 | 1400 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1401 | |
1402 | amber_LED_on (ctrl, hp_slot); | |
1403 | green_LED_off (ctrl, hp_slot); | |
1404 | slot_disable (ctrl, hp_slot); | |
1405 | ||
1406 | set_SOGO(ctrl); | |
1407 | ||
1408 | /* Wait for SOBS to be unset */ | |
1409 | wait_for_ctrl_irq (ctrl); | |
1410 | ||
6aa4cdd0 | 1411 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
1412 | } |
1413 | ||
1414 | } | |
1415 | return rc; | |
1416 | ||
1417 | } | |
1418 | ||
1419 | ||
1420 | /** | |
1421 | * board_added - Called after a board has been added to the system. | |
1422 | * | |
1423 | * Turns power on for the board | |
1424 | * Configures board | |
1425 | * | |
1426 | */ | |
1427 | static u32 board_added(struct pci_func *func, struct controller *ctrl) | |
1428 | { | |
1429 | u8 hp_slot; | |
1430 | u8 temp_byte; | |
1431 | u8 adapter_speed; | |
1432 | int index; | |
1433 | u32 temp_register = 0xFFFFFFFF; | |
1434 | u32 rc = 0; | |
1435 | struct pci_func *new_slot = NULL; | |
1436 | struct slot *p_slot; | |
1437 | struct resource_lists res_lists; | |
1438 | ||
1439 | hp_slot = func->device - ctrl->slot_device_offset; | |
1440 | dbg("%s: func->device, slot_offset, hp_slot = %d, %d ,%d\n", | |
1441 | __FUNCTION__, func->device, ctrl->slot_device_offset, hp_slot); | |
1442 | ||
6aa4cdd0 | 1443 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1444 | |
1445 | /* turn on board without attaching to the bus */ | |
1446 | enable_slot_power(ctrl, hp_slot); | |
1447 | ||
1448 | set_SOGO(ctrl); | |
1449 | ||
1450 | /* Wait for SOBS to be unset */ | |
1451 | wait_for_ctrl_irq (ctrl); | |
1452 | ||
1453 | /* Change bits in slot power register to force another shift out | |
1454 | * NOTE: this is to work around the timer bug */ | |
1455 | temp_byte = readb(ctrl->hpc_reg + SLOT_POWER); | |
1456 | writeb(0x00, ctrl->hpc_reg + SLOT_POWER); | |
1457 | writeb(temp_byte, ctrl->hpc_reg + SLOT_POWER); | |
1458 | ||
1459 | set_SOGO(ctrl); | |
1460 | ||
1461 | /* Wait for SOBS to be unset */ | |
1462 | wait_for_ctrl_irq (ctrl); | |
1463 | ||
1464 | adapter_speed = get_adapter_speed(ctrl, hp_slot); | |
1465 | if (ctrl->speed != adapter_speed) | |
1466 | if (set_controller_speed(ctrl, adapter_speed, hp_slot)) | |
1467 | rc = WRONG_BUS_FREQUENCY; | |
1468 | ||
1469 | /* turn off board without attaching to the bus */ | |
1470 | disable_slot_power (ctrl, hp_slot); | |
1471 | ||
1472 | set_SOGO(ctrl); | |
1473 | ||
1474 | /* Wait for SOBS to be unset */ | |
1475 | wait_for_ctrl_irq(ctrl); | |
1476 | ||
6aa4cdd0 | 1477 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
1478 | |
1479 | if (rc) | |
1480 | return rc; | |
1481 | ||
1482 | p_slot = cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); | |
1483 | ||
1484 | /* turn on board and blink green LED */ | |
1485 | ||
1486 | dbg("%s: before down\n", __FUNCTION__); | |
6aa4cdd0 | 1487 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1488 | dbg("%s: after down\n", __FUNCTION__); |
1489 | ||
1490 | dbg("%s: before slot_enable\n", __FUNCTION__); | |
1491 | slot_enable (ctrl, hp_slot); | |
1492 | ||
1493 | dbg("%s: before green_LED_blink\n", __FUNCTION__); | |
1494 | green_LED_blink (ctrl, hp_slot); | |
1495 | ||
1496 | dbg("%s: before amber_LED_blink\n", __FUNCTION__); | |
1497 | amber_LED_off (ctrl, hp_slot); | |
1498 | ||
1499 | dbg("%s: before set_SOGO\n", __FUNCTION__); | |
1500 | set_SOGO(ctrl); | |
1501 | ||
1502 | /* Wait for SOBS to be unset */ | |
1503 | dbg("%s: before wait_for_ctrl_irq\n", __FUNCTION__); | |
1504 | wait_for_ctrl_irq (ctrl); | |
1505 | dbg("%s: after wait_for_ctrl_irq\n", __FUNCTION__); | |
1506 | ||
1507 | dbg("%s: before up\n", __FUNCTION__); | |
6aa4cdd0 | 1508 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
1509 | dbg("%s: after up\n", __FUNCTION__); |
1510 | ||
1511 | /* Wait for ~1 second because of hot plug spec */ | |
1512 | dbg("%s: before long_delay\n", __FUNCTION__); | |
1513 | long_delay(1*HZ); | |
1514 | dbg("%s: after long_delay\n", __FUNCTION__); | |
1515 | ||
1516 | dbg("%s: func status = %x\n", __FUNCTION__, func->status); | |
1517 | /* Check for a power fault */ | |
1518 | if (func->status == 0xFF) { | |
1519 | /* power fault occurred, but it was benign */ | |
1520 | temp_register = 0xFFFFFFFF; | |
1521 | dbg("%s: temp register set to %x by power fault\n", __FUNCTION__, temp_register); | |
1522 | rc = POWER_FAILURE; | |
1523 | func->status = 0; | |
1524 | } else { | |
1525 | /* Get vendor/device ID u32 */ | |
1526 | ctrl->pci_bus->number = func->bus; | |
1527 | rc = pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(func->device, func->function), PCI_VENDOR_ID, &temp_register); | |
1528 | dbg("%s: pci_read_config_dword returns %d\n", __FUNCTION__, rc); | |
1529 | dbg("%s: temp_register is %x\n", __FUNCTION__, temp_register); | |
1530 | ||
1531 | if (rc != 0) { | |
1532 | /* Something's wrong here */ | |
1533 | temp_register = 0xFFFFFFFF; | |
1534 | dbg("%s: temp register set to %x by error\n", __FUNCTION__, temp_register); | |
1535 | } | |
1536 | /* Preset return code. It will be changed later if things go okay. */ | |
1537 | rc = NO_ADAPTER_PRESENT; | |
1538 | } | |
1539 | ||
1540 | /* All F's is an empty slot or an invalid board */ | |
1541 | if (temp_register != 0xFFFFFFFF) { /* Check for a board in the slot */ | |
1542 | res_lists.io_head = ctrl->io_head; | |
1543 | res_lists.mem_head = ctrl->mem_head; | |
1544 | res_lists.p_mem_head = ctrl->p_mem_head; | |
1545 | res_lists.bus_head = ctrl->bus_head; | |
1546 | res_lists.irqs = NULL; | |
1547 | ||
1548 | rc = configure_new_device(ctrl, func, 0, &res_lists); | |
1549 | ||
1550 | dbg("%s: back from configure_new_device\n", __FUNCTION__); | |
1551 | ctrl->io_head = res_lists.io_head; | |
1552 | ctrl->mem_head = res_lists.mem_head; | |
1553 | ctrl->p_mem_head = res_lists.p_mem_head; | |
1554 | ctrl->bus_head = res_lists.bus_head; | |
1555 | ||
1556 | cpqhp_resource_sort_and_combine(&(ctrl->mem_head)); | |
1557 | cpqhp_resource_sort_and_combine(&(ctrl->p_mem_head)); | |
1558 | cpqhp_resource_sort_and_combine(&(ctrl->io_head)); | |
1559 | cpqhp_resource_sort_and_combine(&(ctrl->bus_head)); | |
1560 | ||
1561 | if (rc) { | |
6aa4cdd0 | 1562 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1563 | |
1564 | amber_LED_on (ctrl, hp_slot); | |
1565 | green_LED_off (ctrl, hp_slot); | |
1566 | slot_disable (ctrl, hp_slot); | |
1567 | ||
1568 | set_SOGO(ctrl); | |
1569 | ||
1570 | /* Wait for SOBS to be unset */ | |
1571 | wait_for_ctrl_irq (ctrl); | |
1572 | ||
6aa4cdd0 | 1573 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
1574 | return rc; |
1575 | } else { | |
1576 | cpqhp_save_slot_config(ctrl, func); | |
1577 | } | |
1578 | ||
1579 | ||
1580 | func->status = 0; | |
1581 | func->switch_save = 0x10; | |
1582 | func->is_a_board = 0x01; | |
1583 | ||
1584 | /* next, we will instantiate the linux pci_dev structures (with | |
1585 | * appropriate driver notification, if already present) */ | |
1586 | dbg("%s: configure linux pci_dev structure\n", __FUNCTION__); | |
1587 | index = 0; | |
1588 | do { | |
1589 | new_slot = cpqhp_slot_find(ctrl->bus, func->device, index++); | |
1590 | if (new_slot && !new_slot->pci_dev) { | |
1591 | cpqhp_configure_device(ctrl, new_slot); | |
1592 | } | |
1593 | } while (new_slot); | |
1594 | ||
6aa4cdd0 | 1595 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1596 | |
1597 | green_LED_on (ctrl, hp_slot); | |
1598 | ||
1599 | set_SOGO(ctrl); | |
1600 | ||
1601 | /* Wait for SOBS to be unset */ | |
1602 | wait_for_ctrl_irq (ctrl); | |
1603 | ||
6aa4cdd0 | 1604 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 | 1605 | } else { |
6aa4cdd0 | 1606 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1607 | |
1608 | amber_LED_on (ctrl, hp_slot); | |
1609 | green_LED_off (ctrl, hp_slot); | |
1610 | slot_disable (ctrl, hp_slot); | |
1611 | ||
1612 | set_SOGO(ctrl); | |
1613 | ||
1614 | /* Wait for SOBS to be unset */ | |
1615 | wait_for_ctrl_irq (ctrl); | |
1616 | ||
6aa4cdd0 | 1617 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
1618 | |
1619 | return rc; | |
1620 | } | |
1621 | return 0; | |
1622 | } | |
1623 | ||
1624 | ||
1625 | /** | |
1626 | * remove_board - Turns off slot and LED's | |
1627 | * | |
1628 | */ | |
1629 | static u32 remove_board(struct pci_func * func, u32 replace_flag, struct controller * ctrl) | |
1630 | { | |
1631 | int index; | |
1632 | u8 skip = 0; | |
1633 | u8 device; | |
1634 | u8 hp_slot; | |
1635 | u8 temp_byte; | |
1636 | u32 rc; | |
1637 | struct resource_lists res_lists; | |
1638 | struct pci_func *temp_func; | |
1639 | ||
1640 | if (cpqhp_unconfigure_device(func)) | |
1641 | return 1; | |
1642 | ||
1643 | device = func->device; | |
1644 | ||
1645 | hp_slot = func->device - ctrl->slot_device_offset; | |
1646 | dbg("In %s, hp_slot = %d\n", __FUNCTION__, hp_slot); | |
1647 | ||
1648 | /* When we get here, it is safe to change base address registers. | |
1649 | * We will attempt to save the base address register lengths */ | |
1650 | if (replace_flag || !ctrl->add_support) | |
1651 | rc = cpqhp_save_base_addr_length(ctrl, func); | |
1652 | else if (!func->bus_head && !func->mem_head && | |
1653 | !func->p_mem_head && !func->io_head) { | |
1654 | /* Here we check to see if we've saved any of the board's | |
1655 | * resources already. If so, we'll skip the attempt to | |
1656 | * determine what's being used. */ | |
1657 | index = 0; | |
1658 | temp_func = cpqhp_slot_find(func->bus, func->device, index++); | |
1659 | while (temp_func) { | |
1660 | if (temp_func->bus_head || temp_func->mem_head | |
1661 | || temp_func->p_mem_head || temp_func->io_head) { | |
1662 | skip = 1; | |
1663 | break; | |
1664 | } | |
1665 | temp_func = cpqhp_slot_find(temp_func->bus, temp_func->device, index++); | |
1666 | } | |
1667 | ||
1668 | if (!skip) | |
1669 | rc = cpqhp_save_used_resources(ctrl, func); | |
1670 | } | |
1671 | /* Change status to shutdown */ | |
1672 | if (func->is_a_board) | |
1673 | func->status = 0x01; | |
1674 | func->configured = 0; | |
1675 | ||
6aa4cdd0 | 1676 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1677 | |
1678 | green_LED_off (ctrl, hp_slot); | |
1679 | slot_disable (ctrl, hp_slot); | |
1680 | ||
1681 | set_SOGO(ctrl); | |
1682 | ||
1683 | /* turn off SERR for slot */ | |
1684 | temp_byte = readb(ctrl->hpc_reg + SLOT_SERR); | |
1685 | temp_byte &= ~(0x01 << hp_slot); | |
1686 | writeb(temp_byte, ctrl->hpc_reg + SLOT_SERR); | |
1687 | ||
1688 | /* Wait for SOBS to be unset */ | |
1689 | wait_for_ctrl_irq (ctrl); | |
1690 | ||
6aa4cdd0 | 1691 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
1692 | |
1693 | if (!replace_flag && ctrl->add_support) { | |
1694 | while (func) { | |
1695 | res_lists.io_head = ctrl->io_head; | |
1696 | res_lists.mem_head = ctrl->mem_head; | |
1697 | res_lists.p_mem_head = ctrl->p_mem_head; | |
1698 | res_lists.bus_head = ctrl->bus_head; | |
1699 | ||
1700 | cpqhp_return_board_resources(func, &res_lists); | |
1701 | ||
1702 | ctrl->io_head = res_lists.io_head; | |
1703 | ctrl->mem_head = res_lists.mem_head; | |
1704 | ctrl->p_mem_head = res_lists.p_mem_head; | |
1705 | ctrl->bus_head = res_lists.bus_head; | |
1706 | ||
1707 | cpqhp_resource_sort_and_combine(&(ctrl->mem_head)); | |
1708 | cpqhp_resource_sort_and_combine(&(ctrl->p_mem_head)); | |
1709 | cpqhp_resource_sort_and_combine(&(ctrl->io_head)); | |
1710 | cpqhp_resource_sort_and_combine(&(ctrl->bus_head)); | |
1711 | ||
1712 | if (is_bridge(func)) { | |
1713 | bridge_slot_remove(func); | |
1714 | } else | |
1715 | slot_remove(func); | |
1716 | ||
1717 | func = cpqhp_slot_find(ctrl->bus, device, 0); | |
1718 | } | |
1719 | ||
1720 | /* Setup slot structure with entry for empty slot */ | |
1721 | func = cpqhp_slot_create(ctrl->bus); | |
1722 | ||
1723 | if (func == NULL) | |
1724 | return 1; | |
1725 | ||
1726 | func->bus = ctrl->bus; | |
1727 | func->device = device; | |
1728 | func->function = 0; | |
1729 | func->configured = 0; | |
1730 | func->switch_save = 0x10; | |
1731 | func->is_a_board = 0; | |
1732 | func->p_task_event = NULL; | |
1733 | } | |
1734 | ||
1735 | return 0; | |
1736 | } | |
1737 | ||
1738 | static void pushbutton_helper_thread(unsigned long data) | |
1739 | { | |
1740 | pushbutton_pending = data; | |
1741 | up(&event_semaphore); | |
1742 | } | |
1743 | ||
1744 | ||
1745 | /* this is the main worker thread */ | |
1746 | static int event_thread(void* data) | |
1747 | { | |
1748 | struct controller *ctrl; | |
60ac8f20 | 1749 | |
1da177e4 | 1750 | daemonize("phpd_event"); |
1da177e4 LT |
1751 | |
1752 | while (1) { | |
1753 | dbg("!!!!event_thread sleeping\n"); | |
1754 | down_interruptible (&event_semaphore); | |
1755 | dbg("event_thread woken finished = %d\n", event_finished); | |
1756 | if (event_finished) break; | |
1757 | /* Do stuff here */ | |
1758 | if (pushbutton_pending) | |
1759 | cpqhp_pushbutton_thread(pushbutton_pending); | |
1760 | else | |
1761 | for (ctrl = cpqhp_ctrl_list; ctrl; ctrl=ctrl->next) | |
1762 | interrupt_event_handler(ctrl); | |
1763 | } | |
1764 | dbg("event_thread signals exit\n"); | |
1765 | up(&event_exit); | |
1766 | return 0; | |
1767 | } | |
1768 | ||
1769 | ||
1770 | int cpqhp_event_start_thread(void) | |
1771 | { | |
1772 | int pid; | |
1773 | ||
1774 | /* initialize our semaphores */ | |
1775 | init_MUTEX(&delay_sem); | |
1776 | init_MUTEX_LOCKED(&event_semaphore); | |
1777 | init_MUTEX_LOCKED(&event_exit); | |
1778 | event_finished=0; | |
1779 | ||
1780 | pid = kernel_thread(event_thread, NULL, 0); | |
1781 | if (pid < 0) { | |
1782 | err ("Can't start up our event thread\n"); | |
1783 | return -1; | |
1784 | } | |
1785 | dbg("Our event thread pid = %d\n", pid); | |
1786 | return 0; | |
1787 | } | |
1788 | ||
1789 | ||
1790 | void cpqhp_event_stop_thread(void) | |
1791 | { | |
1792 | event_finished = 1; | |
1793 | dbg("event_thread finish command given\n"); | |
1794 | up(&event_semaphore); | |
1795 | dbg("wait for event_thread to exit\n"); | |
1796 | down(&event_exit); | |
1797 | } | |
1798 | ||
1799 | ||
1800 | static int update_slot_info(struct controller *ctrl, struct slot *slot) | |
1801 | { | |
1802 | struct hotplug_slot_info *info; | |
1803 | int result; | |
1804 | ||
1805 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
1806 | if (!info) | |
1807 | return -ENOMEM; | |
1808 | ||
1809 | info->power_status = get_slot_enabled(ctrl, slot); | |
1810 | info->attention_status = cpq_get_attention_status(ctrl, slot); | |
1811 | info->latch_status = cpq_get_latch_status(ctrl, slot); | |
1812 | info->adapter_status = get_presence_status(ctrl, slot); | |
1813 | result = pci_hp_change_slot_info(slot->hotplug_slot, info); | |
1814 | kfree (info); | |
1815 | return result; | |
1816 | } | |
1817 | ||
1818 | static void interrupt_event_handler(struct controller *ctrl) | |
1819 | { | |
1820 | int loop = 0; | |
1821 | int change = 1; | |
1822 | struct pci_func *func; | |
1823 | u8 hp_slot; | |
1824 | struct slot *p_slot; | |
1825 | ||
1826 | while (change) { | |
1827 | change = 0; | |
1828 | ||
1829 | for (loop = 0; loop < 10; loop++) { | |
1830 | /* dbg("loop %d\n", loop); */ | |
1831 | if (ctrl->event_queue[loop].event_type != 0) { | |
1832 | hp_slot = ctrl->event_queue[loop].hp_slot; | |
1833 | ||
1834 | func = cpqhp_slot_find(ctrl->bus, (hp_slot + ctrl->slot_device_offset), 0); | |
1835 | if (!func) | |
1836 | return; | |
1837 | ||
1838 | p_slot = cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); | |
1839 | if (!p_slot) | |
1840 | return; | |
1841 | ||
1842 | dbg("hp_slot %d, func %p, p_slot %p\n", | |
1843 | hp_slot, func, p_slot); | |
1844 | ||
1845 | if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) { | |
1846 | dbg("button pressed\n"); | |
1847 | } else if (ctrl->event_queue[loop].event_type == | |
1848 | INT_BUTTON_CANCEL) { | |
1849 | dbg("button cancel\n"); | |
1850 | del_timer(&p_slot->task_event); | |
1851 | ||
6aa4cdd0 | 1852 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1853 | |
1854 | if (p_slot->state == BLINKINGOFF_STATE) { | |
1855 | /* slot is on */ | |
1856 | dbg("turn on green LED\n"); | |
1857 | green_LED_on (ctrl, hp_slot); | |
1858 | } else if (p_slot->state == BLINKINGON_STATE) { | |
1859 | /* slot is off */ | |
1860 | dbg("turn off green LED\n"); | |
1861 | green_LED_off (ctrl, hp_slot); | |
1862 | } | |
1863 | ||
1864 | info(msg_button_cancel, p_slot->number); | |
1865 | ||
1866 | p_slot->state = STATIC_STATE; | |
1867 | ||
1868 | amber_LED_off (ctrl, hp_slot); | |
1869 | ||
1870 | set_SOGO(ctrl); | |
1871 | ||
1872 | /* Wait for SOBS to be unset */ | |
1873 | wait_for_ctrl_irq (ctrl); | |
1874 | ||
6aa4cdd0 | 1875 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
1876 | } |
1877 | /*** button Released (No action on press...) */ | |
1878 | else if (ctrl->event_queue[loop].event_type == INT_BUTTON_RELEASE) { | |
1879 | dbg("button release\n"); | |
1880 | ||
1881 | if (is_slot_enabled (ctrl, hp_slot)) { | |
1882 | dbg("slot is on\n"); | |
1883 | p_slot->state = BLINKINGOFF_STATE; | |
1884 | info(msg_button_off, p_slot->number); | |
1885 | } else { | |
1886 | dbg("slot is off\n"); | |
1887 | p_slot->state = BLINKINGON_STATE; | |
1888 | info(msg_button_on, p_slot->number); | |
1889 | } | |
6aa4cdd0 | 1890 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1891 | |
1892 | dbg("blink green LED and turn off amber\n"); | |
1893 | ||
1894 | amber_LED_off (ctrl, hp_slot); | |
1895 | green_LED_blink (ctrl, hp_slot); | |
1896 | ||
1897 | set_SOGO(ctrl); | |
1898 | ||
1899 | /* Wait for SOBS to be unset */ | |
1900 | wait_for_ctrl_irq (ctrl); | |
1901 | ||
6aa4cdd0 | 1902 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
1903 | init_timer(&p_slot->task_event); |
1904 | p_slot->hp_slot = hp_slot; | |
1905 | p_slot->ctrl = ctrl; | |
1906 | /* p_slot->physical_slot = physical_slot; */ | |
1907 | p_slot->task_event.expires = jiffies + 5 * HZ; /* 5 second delay */ | |
1908 | p_slot->task_event.function = pushbutton_helper_thread; | |
1909 | p_slot->task_event.data = (u32) p_slot; | |
1910 | ||
1911 | dbg("add_timer p_slot = %p\n", p_slot); | |
1912 | add_timer(&p_slot->task_event); | |
1913 | } | |
1914 | /***********POWER FAULT */ | |
1915 | else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) { | |
1916 | dbg("power fault\n"); | |
1917 | } else { | |
1918 | /* refresh notification */ | |
1919 | if (p_slot) | |
1920 | update_slot_info(ctrl, p_slot); | |
1921 | } | |
1922 | ||
1923 | ctrl->event_queue[loop].event_type = 0; | |
1924 | ||
1925 | change = 1; | |
1926 | } | |
1927 | } /* End of FOR loop */ | |
1928 | } | |
1929 | ||
1930 | return; | |
1931 | } | |
1932 | ||
1933 | ||
1934 | /** | |
1935 | * cpqhp_pushbutton_thread | |
1936 | * | |
1937 | * Scheduled procedure to handle blocking stuff for the pushbuttons | |
1938 | * Handles all pending events and exits. | |
1939 | * | |
1940 | */ | |
1941 | void cpqhp_pushbutton_thread(unsigned long slot) | |
1942 | { | |
1943 | u8 hp_slot; | |
1944 | u8 device; | |
1945 | struct pci_func *func; | |
1946 | struct slot *p_slot = (struct slot *) slot; | |
1947 | struct controller *ctrl = (struct controller *) p_slot->ctrl; | |
1948 | ||
1949 | pushbutton_pending = 0; | |
1950 | hp_slot = p_slot->hp_slot; | |
1951 | ||
1952 | device = p_slot->device; | |
1953 | ||
1954 | if (is_slot_enabled(ctrl, hp_slot)) { | |
1955 | p_slot->state = POWEROFF_STATE; | |
1956 | /* power Down board */ | |
1957 | func = cpqhp_slot_find(p_slot->bus, p_slot->device, 0); | |
1958 | dbg("In power_down_board, func = %p, ctrl = %p\n", func, ctrl); | |
1959 | if (!func) { | |
1960 | dbg("Error! func NULL in %s\n", __FUNCTION__); | |
1961 | return ; | |
1962 | } | |
1963 | ||
1964 | if (func != NULL && ctrl != NULL) { | |
1965 | if (cpqhp_process_SS(ctrl, func) != 0) { | |
1966 | amber_LED_on (ctrl, hp_slot); | |
1967 | green_LED_on (ctrl, hp_slot); | |
1968 | ||
1969 | set_SOGO(ctrl); | |
1970 | ||
1971 | /* Wait for SOBS to be unset */ | |
1972 | wait_for_ctrl_irq (ctrl); | |
1973 | } | |
1974 | } | |
1975 | ||
1976 | p_slot->state = STATIC_STATE; | |
1977 | } else { | |
1978 | p_slot->state = POWERON_STATE; | |
1979 | /* slot is off */ | |
1980 | ||
1981 | func = cpqhp_slot_find(p_slot->bus, p_slot->device, 0); | |
1982 | dbg("In add_board, func = %p, ctrl = %p\n", func, ctrl); | |
1983 | if (!func) { | |
1984 | dbg("Error! func NULL in %s\n", __FUNCTION__); | |
1985 | return ; | |
1986 | } | |
1987 | ||
1988 | if (func != NULL && ctrl != NULL) { | |
1989 | if (cpqhp_process_SI(ctrl, func) != 0) { | |
1990 | amber_LED_on(ctrl, hp_slot); | |
1991 | green_LED_off(ctrl, hp_slot); | |
1992 | ||
1993 | set_SOGO(ctrl); | |
1994 | ||
1995 | /* Wait for SOBS to be unset */ | |
1996 | wait_for_ctrl_irq (ctrl); | |
1997 | } | |
1998 | } | |
1999 | ||
2000 | p_slot->state = STATIC_STATE; | |
2001 | } | |
2002 | ||
2003 | return; | |
2004 | } | |
2005 | ||
2006 | ||
2007 | int cpqhp_process_SI(struct controller *ctrl, struct pci_func *func) | |
2008 | { | |
2009 | u8 device, hp_slot; | |
2010 | u16 temp_word; | |
2011 | u32 tempdword; | |
2012 | int rc; | |
2013 | struct slot* p_slot; | |
2014 | int physical_slot = 0; | |
2015 | ||
2016 | tempdword = 0; | |
2017 | ||
2018 | device = func->device; | |
2019 | hp_slot = device - ctrl->slot_device_offset; | |
2020 | p_slot = cpqhp_find_slot(ctrl, device); | |
2021 | if (p_slot) | |
2022 | physical_slot = p_slot->number; | |
2023 | ||
2024 | /* Check to see if the interlock is closed */ | |
2025 | tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR); | |
2026 | ||
2027 | if (tempdword & (0x01 << hp_slot)) { | |
2028 | return 1; | |
2029 | } | |
2030 | ||
2031 | if (func->is_a_board) { | |
2032 | rc = board_replaced(func, ctrl); | |
2033 | } else { | |
2034 | /* add board */ | |
2035 | slot_remove(func); | |
2036 | ||
2037 | func = cpqhp_slot_create(ctrl->bus); | |
2038 | if (func == NULL) | |
2039 | return 1; | |
2040 | ||
2041 | func->bus = ctrl->bus; | |
2042 | func->device = device; | |
2043 | func->function = 0; | |
2044 | func->configured = 0; | |
2045 | func->is_a_board = 1; | |
2046 | ||
2047 | /* We have to save the presence info for these slots */ | |
2048 | temp_word = ctrl->ctrl_int_comp >> 16; | |
2049 | func->presence_save = (temp_word >> hp_slot) & 0x01; | |
2050 | func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02; | |
2051 | ||
2052 | if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) { | |
2053 | func->switch_save = 0; | |
2054 | } else { | |
2055 | func->switch_save = 0x10; | |
2056 | } | |
2057 | ||
2058 | rc = board_added(func, ctrl); | |
2059 | if (rc) { | |
2060 | if (is_bridge(func)) { | |
2061 | bridge_slot_remove(func); | |
2062 | } else | |
2063 | slot_remove(func); | |
2064 | ||
2065 | /* Setup slot structure with entry for empty slot */ | |
2066 | func = cpqhp_slot_create(ctrl->bus); | |
2067 | ||
2068 | if (func == NULL) | |
2069 | return 1; | |
2070 | ||
2071 | func->bus = ctrl->bus; | |
2072 | func->device = device; | |
2073 | func->function = 0; | |
2074 | func->configured = 0; | |
2075 | func->is_a_board = 0; | |
2076 | ||
2077 | /* We have to save the presence info for these slots */ | |
2078 | temp_word = ctrl->ctrl_int_comp >> 16; | |
2079 | func->presence_save = (temp_word >> hp_slot) & 0x01; | |
2080 | func->presence_save |= | |
2081 | (temp_word >> (hp_slot + 7)) & 0x02; | |
2082 | ||
2083 | if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) { | |
2084 | func->switch_save = 0; | |
2085 | } else { | |
2086 | func->switch_save = 0x10; | |
2087 | } | |
2088 | } | |
2089 | } | |
2090 | ||
2091 | if (rc) { | |
2092 | dbg("%s: rc = %d\n", __FUNCTION__, rc); | |
2093 | } | |
2094 | ||
2095 | if (p_slot) | |
2096 | update_slot_info(ctrl, p_slot); | |
2097 | ||
2098 | return rc; | |
2099 | } | |
2100 | ||
2101 | ||
2102 | int cpqhp_process_SS(struct controller *ctrl, struct pci_func *func) | |
2103 | { | |
2104 | u8 device, class_code, header_type, BCR; | |
2105 | u8 index = 0; | |
2106 | u8 replace_flag; | |
2107 | u32 rc = 0; | |
2108 | unsigned int devfn; | |
2109 | struct slot* p_slot; | |
2110 | struct pci_bus *pci_bus = ctrl->pci_bus; | |
2111 | int physical_slot=0; | |
2112 | ||
2113 | device = func->device; | |
2114 | func = cpqhp_slot_find(ctrl->bus, device, index++); | |
2115 | p_slot = cpqhp_find_slot(ctrl, device); | |
2116 | if (p_slot) { | |
2117 | physical_slot = p_slot->number; | |
2118 | } | |
2119 | ||
2120 | /* Make sure there are no video controllers here */ | |
2121 | while (func && !rc) { | |
2122 | pci_bus->number = func->bus; | |
2123 | devfn = PCI_DEVFN(func->device, func->function); | |
2124 | ||
2125 | /* Check the Class Code */ | |
2126 | rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code); | |
2127 | if (rc) | |
2128 | return rc; | |
2129 | ||
2130 | if (class_code == PCI_BASE_CLASS_DISPLAY) { | |
2131 | /* Display/Video adapter (not supported) */ | |
2132 | rc = REMOVE_NOT_SUPPORTED; | |
2133 | } else { | |
2134 | /* See if it's a bridge */ | |
2135 | rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type); | |
2136 | if (rc) | |
2137 | return rc; | |
2138 | ||
2139 | /* If it's a bridge, check the VGA Enable bit */ | |
2140 | if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { | |
2141 | rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_BRIDGE_CONTROL, &BCR); | |
2142 | if (rc) | |
2143 | return rc; | |
2144 | ||
2145 | /* If the VGA Enable bit is set, remove isn't | |
2146 | * supported */ | |
2147 | if (BCR & PCI_BRIDGE_CTL_VGA) { | |
2148 | rc = REMOVE_NOT_SUPPORTED; | |
2149 | } | |
2150 | } | |
2151 | } | |
2152 | ||
2153 | func = cpqhp_slot_find(ctrl->bus, device, index++); | |
2154 | } | |
2155 | ||
2156 | func = cpqhp_slot_find(ctrl->bus, device, 0); | |
2157 | if ((func != NULL) && !rc) { | |
2158 | /* FIXME: Replace flag should be passed into process_SS */ | |
2159 | replace_flag = !(ctrl->add_support); | |
2160 | rc = remove_board(func, replace_flag, ctrl); | |
2161 | } else if (!rc) { | |
2162 | rc = 1; | |
2163 | } | |
2164 | ||
2165 | if (p_slot) | |
2166 | update_slot_info(ctrl, p_slot); | |
2167 | ||
2168 | return rc; | |
2169 | } | |
2170 | ||
2171 | /** | |
2172 | * switch_leds: switch the leds, go from one site to the other. | |
2173 | * @ctrl: controller to use | |
2174 | * @num_of_slots: number of slots to use | |
2175 | * @direction: 1 to start from the left side, 0 to start right. | |
2176 | */ | |
2177 | static void switch_leds(struct controller *ctrl, const int num_of_slots, | |
2178 | u32 *work_LED, const int direction) | |
2179 | { | |
2180 | int loop; | |
2181 | ||
2182 | for (loop = 0; loop < num_of_slots; loop++) { | |
2183 | if (direction) | |
2184 | *work_LED = *work_LED >> 1; | |
2185 | else | |
2186 | *work_LED = *work_LED << 1; | |
2187 | writel(*work_LED, ctrl->hpc_reg + LED_CONTROL); | |
2188 | ||
2189 | set_SOGO(ctrl); | |
2190 | ||
2191 | /* Wait for SOGO interrupt */ | |
2192 | wait_for_ctrl_irq(ctrl); | |
2193 | ||
2194 | /* Get ready for next iteration */ | |
2195 | long_delay((2*HZ)/10); | |
2196 | } | |
2197 | } | |
2198 | ||
2199 | /** | |
2200 | * hardware_test - runs hardware tests | |
2201 | * | |
2202 | * For hot plug ctrl folks to play with. | |
2203 | * test_num is the number written to the "test" file in sysfs | |
2204 | * | |
2205 | */ | |
2206 | int cpqhp_hardware_test(struct controller *ctrl, int test_num) | |
2207 | { | |
2208 | u32 save_LED; | |
2209 | u32 work_LED; | |
2210 | int loop; | |
2211 | int num_of_slots; | |
2212 | ||
2213 | num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0f; | |
2214 | ||
2215 | switch (test_num) { | |
2216 | case 1: | |
2217 | /* Do stuff here! */ | |
2218 | ||
2219 | /* Do that funky LED thing */ | |
2220 | /* so we can restore them later */ | |
2221 | save_LED = readl(ctrl->hpc_reg + LED_CONTROL); | |
2222 | work_LED = 0x01010101; | |
2223 | switch_leds(ctrl, num_of_slots, &work_LED, 0); | |
2224 | switch_leds(ctrl, num_of_slots, &work_LED, 1); | |
2225 | switch_leds(ctrl, num_of_slots, &work_LED, 0); | |
2226 | switch_leds(ctrl, num_of_slots, &work_LED, 1); | |
2227 | ||
2228 | work_LED = 0x01010000; | |
2229 | writel(work_LED, ctrl->hpc_reg + LED_CONTROL); | |
2230 | switch_leds(ctrl, num_of_slots, &work_LED, 0); | |
2231 | switch_leds(ctrl, num_of_slots, &work_LED, 1); | |
2232 | work_LED = 0x00000101; | |
2233 | writel(work_LED, ctrl->hpc_reg + LED_CONTROL); | |
2234 | switch_leds(ctrl, num_of_slots, &work_LED, 0); | |
2235 | switch_leds(ctrl, num_of_slots, &work_LED, 1); | |
2236 | ||
2237 | work_LED = 0x01010000; | |
2238 | writel(work_LED, ctrl->hpc_reg + LED_CONTROL); | |
2239 | for (loop = 0; loop < num_of_slots; loop++) { | |
2240 | set_SOGO(ctrl); | |
2241 | ||
2242 | /* Wait for SOGO interrupt */ | |
2243 | wait_for_ctrl_irq (ctrl); | |
2244 | ||
2245 | /* Get ready for next iteration */ | |
2246 | long_delay((3*HZ)/10); | |
2247 | work_LED = work_LED >> 16; | |
2248 | writel(work_LED, ctrl->hpc_reg + LED_CONTROL); | |
2249 | ||
2250 | set_SOGO(ctrl); | |
2251 | ||
2252 | /* Wait for SOGO interrupt */ | |
2253 | wait_for_ctrl_irq (ctrl); | |
2254 | ||
2255 | /* Get ready for next iteration */ | |
2256 | long_delay((3*HZ)/10); | |
2257 | work_LED = work_LED << 16; | |
2258 | writel(work_LED, ctrl->hpc_reg + LED_CONTROL); | |
2259 | work_LED = work_LED << 1; | |
2260 | writel(work_LED, ctrl->hpc_reg + LED_CONTROL); | |
2261 | } | |
2262 | ||
2263 | /* put it back the way it was */ | |
2264 | writel(save_LED, ctrl->hpc_reg + LED_CONTROL); | |
2265 | ||
2266 | set_SOGO(ctrl); | |
2267 | ||
2268 | /* Wait for SOBS to be unset */ | |
2269 | wait_for_ctrl_irq (ctrl); | |
2270 | break; | |
2271 | case 2: | |
2272 | /* Do other stuff here! */ | |
2273 | break; | |
2274 | case 3: | |
2275 | /* and more... */ | |
2276 | break; | |
2277 | } | |
2278 | return 0; | |
2279 | } | |
2280 | ||
2281 | ||
2282 | /** | |
2283 | * configure_new_device - Configures the PCI header information of one board. | |
2284 | * | |
2285 | * @ctrl: pointer to controller structure | |
2286 | * @func: pointer to function structure | |
2287 | * @behind_bridge: 1 if this is a recursive call, 0 if not | |
2288 | * @resources: pointer to set of resource lists | |
2289 | * | |
2290 | * Returns 0 if success | |
2291 | * | |
2292 | */ | |
2293 | static u32 configure_new_device(struct controller * ctrl, struct pci_func * func, | |
2294 | u8 behind_bridge, struct resource_lists * resources) | |
2295 | { | |
2296 | u8 temp_byte, function, max_functions, stop_it; | |
2297 | int rc; | |
2298 | u32 ID; | |
2299 | struct pci_func *new_slot; | |
2300 | int index; | |
2301 | ||
2302 | new_slot = func; | |
2303 | ||
2304 | dbg("%s\n", __FUNCTION__); | |
2305 | /* Check for Multi-function device */ | |
2306 | ctrl->pci_bus->number = func->bus; | |
2307 | rc = pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(func->device, func->function), 0x0E, &temp_byte); | |
2308 | if (rc) { | |
2309 | dbg("%s: rc = %d\n", __FUNCTION__, rc); | |
2310 | return rc; | |
2311 | } | |
2312 | ||
2313 | if (temp_byte & 0x80) /* Multi-function device */ | |
2314 | max_functions = 8; | |
2315 | else | |
2316 | max_functions = 1; | |
2317 | ||
2318 | function = 0; | |
2319 | ||
2320 | do { | |
2321 | rc = configure_new_function(ctrl, new_slot, behind_bridge, resources); | |
2322 | ||
2323 | if (rc) { | |
2324 | dbg("configure_new_function failed %d\n",rc); | |
2325 | index = 0; | |
2326 | ||
2327 | while (new_slot) { | |
2328 | new_slot = cpqhp_slot_find(new_slot->bus, new_slot->device, index++); | |
2329 | ||
2330 | if (new_slot) | |
2331 | cpqhp_return_board_resources(new_slot, resources); | |
2332 | } | |
2333 | ||
2334 | return rc; | |
2335 | } | |
2336 | ||
2337 | function++; | |
2338 | ||
2339 | stop_it = 0; | |
2340 | ||
2341 | /* The following loop skips to the next present function | |
2342 | * and creates a board structure */ | |
2343 | ||
2344 | while ((function < max_functions) && (!stop_it)) { | |
2345 | pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(func->device, function), 0x00, &ID); | |
2346 | ||
2347 | if (ID == 0xFFFFFFFF) { /* There's nothing there. */ | |
2348 | function++; | |
2349 | } else { /* There's something there */ | |
2350 | /* Setup slot structure. */ | |
2351 | new_slot = cpqhp_slot_create(func->bus); | |
2352 | ||
2353 | if (new_slot == NULL) | |
2354 | return 1; | |
2355 | ||
2356 | new_slot->bus = func->bus; | |
2357 | new_slot->device = func->device; | |
2358 | new_slot->function = function; | |
2359 | new_slot->is_a_board = 1; | |
2360 | new_slot->status = 0; | |
2361 | ||
2362 | stop_it++; | |
2363 | } | |
2364 | } | |
2365 | ||
2366 | } while (function < max_functions); | |
2367 | dbg("returning from configure_new_device\n"); | |
2368 | ||
2369 | return 0; | |
2370 | } | |
2371 | ||
2372 | ||
2373 | /* | |
2374 | Configuration logic that involves the hotplug data structures and | |
2375 | their bookkeeping | |
2376 | */ | |
2377 | ||
2378 | ||
2379 | /** | |
2380 | * configure_new_function - Configures the PCI header information of one device | |
2381 | * | |
2382 | * @ctrl: pointer to controller structure | |
2383 | * @func: pointer to function structure | |
2384 | * @behind_bridge: 1 if this is a recursive call, 0 if not | |
2385 | * @resources: pointer to set of resource lists | |
2386 | * | |
2387 | * Calls itself recursively for bridged devices. | |
2388 | * Returns 0 if success | |
2389 | * | |
2390 | */ | |
2391 | static int configure_new_function(struct controller *ctrl, struct pci_func *func, | |
2392 | u8 behind_bridge, | |
2393 | struct resource_lists *resources) | |
2394 | { | |
2395 | int cloop; | |
2396 | u8 IRQ = 0; | |
2397 | u8 temp_byte; | |
2398 | u8 device; | |
2399 | u8 class_code; | |
2400 | u16 command; | |
2401 | u16 temp_word; | |
2402 | u32 temp_dword; | |
2403 | u32 rc; | |
2404 | u32 temp_register; | |
2405 | u32 base; | |
2406 | u32 ID; | |
2407 | unsigned int devfn; | |
2408 | struct pci_resource *mem_node; | |
2409 | struct pci_resource *p_mem_node; | |
2410 | struct pci_resource *io_node; | |
2411 | struct pci_resource *bus_node; | |
2412 | struct pci_resource *hold_mem_node; | |
2413 | struct pci_resource *hold_p_mem_node; | |
2414 | struct pci_resource *hold_IO_node; | |
2415 | struct pci_resource *hold_bus_node; | |
2416 | struct irq_mapping irqs; | |
2417 | struct pci_func *new_slot; | |
2418 | struct pci_bus *pci_bus; | |
2419 | struct resource_lists temp_resources; | |
2420 | ||
2421 | pci_bus = ctrl->pci_bus; | |
2422 | pci_bus->number = func->bus; | |
2423 | devfn = PCI_DEVFN(func->device, func->function); | |
2424 | ||
2425 | /* Check for Bridge */ | |
2426 | rc = pci_bus_read_config_byte(pci_bus, devfn, PCI_HEADER_TYPE, &temp_byte); | |
2427 | if (rc) | |
2428 | return rc; | |
2429 | ||
2430 | if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { /* PCI-PCI Bridge */ | |
2431 | /* set Primary bus */ | |
2432 | dbg("set Primary bus = %d\n", func->bus); | |
2433 | rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_PRIMARY_BUS, func->bus); | |
2434 | if (rc) | |
2435 | return rc; | |
2436 | ||
2437 | /* find range of busses to use */ | |
2438 | dbg("find ranges of buses to use\n"); | |
2439 | bus_node = get_max_resource(&(resources->bus_head), 1); | |
2440 | ||
2441 | /* If we don't have any busses to allocate, we can't continue */ | |
2442 | if (!bus_node) | |
2443 | return -ENOMEM; | |
2444 | ||
2445 | /* set Secondary bus */ | |
2446 | temp_byte = bus_node->base; | |
2447 | dbg("set Secondary bus = %d\n", bus_node->base); | |
2448 | rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SECONDARY_BUS, temp_byte); | |
2449 | if (rc) | |
2450 | return rc; | |
2451 | ||
2452 | /* set subordinate bus */ | |
2453 | temp_byte = bus_node->base + bus_node->length - 1; | |
2454 | dbg("set subordinate bus = %d\n", bus_node->base + bus_node->length - 1); | |
2455 | rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte); | |
2456 | if (rc) | |
2457 | return rc; | |
2458 | ||
2459 | /* set subordinate Latency Timer and base Latency Timer */ | |
2460 | temp_byte = 0x40; | |
2461 | rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, temp_byte); | |
2462 | if (rc) | |
2463 | return rc; | |
2464 | rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, temp_byte); | |
2465 | if (rc) | |
2466 | return rc; | |
2467 | ||
2468 | /* set Cache Line size */ | |
2469 | temp_byte = 0x08; | |
2470 | rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, temp_byte); | |
2471 | if (rc) | |
2472 | return rc; | |
2473 | ||
2474 | /* Setup the IO, memory, and prefetchable windows */ | |
2475 | io_node = get_max_resource(&(resources->io_head), 0x1000); | |
2476 | if (!io_node) | |
2477 | return -ENOMEM; | |
2478 | mem_node = get_max_resource(&(resources->mem_head), 0x100000); | |
2479 | if (!mem_node) | |
2480 | return -ENOMEM; | |
2481 | p_mem_node = get_max_resource(&(resources->p_mem_head), 0x100000); | |
2482 | if (!p_mem_node) | |
2483 | return -ENOMEM; | |
2484 | dbg("Setup the IO, memory, and prefetchable windows\n"); | |
2485 | dbg("io_node\n"); | |
2486 | dbg("(base, len, next) (%x, %x, %p)\n", io_node->base, | |
2487 | io_node->length, io_node->next); | |
2488 | dbg("mem_node\n"); | |
2489 | dbg("(base, len, next) (%x, %x, %p)\n", mem_node->base, | |
2490 | mem_node->length, mem_node->next); | |
2491 | dbg("p_mem_node\n"); | |
2492 | dbg("(base, len, next) (%x, %x, %p)\n", p_mem_node->base, | |
2493 | p_mem_node->length, p_mem_node->next); | |
2494 | ||
2495 | /* set up the IRQ info */ | |
2496 | if (!resources->irqs) { | |
2497 | irqs.barber_pole = 0; | |
2498 | irqs.interrupt[0] = 0; | |
2499 | irqs.interrupt[1] = 0; | |
2500 | irqs.interrupt[2] = 0; | |
2501 | irqs.interrupt[3] = 0; | |
2502 | irqs.valid_INT = 0; | |
2503 | } else { | |
2504 | irqs.barber_pole = resources->irqs->barber_pole; | |
2505 | irqs.interrupt[0] = resources->irqs->interrupt[0]; | |
2506 | irqs.interrupt[1] = resources->irqs->interrupt[1]; | |
2507 | irqs.interrupt[2] = resources->irqs->interrupt[2]; | |
2508 | irqs.interrupt[3] = resources->irqs->interrupt[3]; | |
2509 | irqs.valid_INT = resources->irqs->valid_INT; | |
2510 | } | |
2511 | ||
2512 | /* set up resource lists that are now aligned on top and bottom | |
2513 | * for anything behind the bridge. */ | |
2514 | temp_resources.bus_head = bus_node; | |
2515 | temp_resources.io_head = io_node; | |
2516 | temp_resources.mem_head = mem_node; | |
2517 | temp_resources.p_mem_head = p_mem_node; | |
2518 | temp_resources.irqs = &irqs; | |
2519 | ||
2520 | /* Make copies of the nodes we are going to pass down so that | |
2521 | * if there is a problem,we can just use these to free resources */ | |
2522 | hold_bus_node = kmalloc(sizeof(*hold_bus_node), GFP_KERNEL); | |
2523 | hold_IO_node = kmalloc(sizeof(*hold_IO_node), GFP_KERNEL); | |
2524 | hold_mem_node = kmalloc(sizeof(*hold_mem_node), GFP_KERNEL); | |
2525 | hold_p_mem_node = kmalloc(sizeof(*hold_p_mem_node), GFP_KERNEL); | |
2526 | ||
2527 | if (!hold_bus_node || !hold_IO_node || !hold_mem_node || !hold_p_mem_node) { | |
2528 | kfree(hold_bus_node); | |
2529 | kfree(hold_IO_node); | |
2530 | kfree(hold_mem_node); | |
2531 | kfree(hold_p_mem_node); | |
2532 | ||
2533 | return 1; | |
2534 | } | |
2535 | ||
2536 | memcpy(hold_bus_node, bus_node, sizeof(struct pci_resource)); | |
2537 | ||
2538 | bus_node->base += 1; | |
2539 | bus_node->length -= 1; | |
2540 | bus_node->next = NULL; | |
2541 | ||
2542 | /* If we have IO resources copy them and fill in the bridge's | |
2543 | * IO range registers */ | |
2544 | if (io_node) { | |
2545 | memcpy(hold_IO_node, io_node, sizeof(struct pci_resource)); | |
2546 | io_node->next = NULL; | |
2547 | ||
2548 | /* set IO base and Limit registers */ | |
2549 | temp_byte = io_node->base >> 8; | |
2550 | rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_BASE, temp_byte); | |
2551 | ||
2552 | temp_byte = (io_node->base + io_node->length - 1) >> 8; | |
2553 | rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_LIMIT, temp_byte); | |
2554 | } else { | |
2555 | kfree(hold_IO_node); | |
2556 | hold_IO_node = NULL; | |
2557 | } | |
2558 | ||
2559 | /* If we have memory resources copy them and fill in the | |
2560 | * bridge's memory range registers. Otherwise, fill in the | |
2561 | * range registers with values that disable them. */ | |
2562 | if (mem_node) { | |
2563 | memcpy(hold_mem_node, mem_node, sizeof(struct pci_resource)); | |
2564 | mem_node->next = NULL; | |
2565 | ||
2566 | /* set Mem base and Limit registers */ | |
2567 | temp_word = mem_node->base >> 16; | |
2568 | rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_BASE, temp_word); | |
2569 | ||
2570 | temp_word = (mem_node->base + mem_node->length - 1) >> 16; | |
2571 | rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word); | |
2572 | } else { | |
2573 | temp_word = 0xFFFF; | |
2574 | rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_BASE, temp_word); | |
2575 | ||
2576 | temp_word = 0x0000; | |
2577 | rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word); | |
2578 | ||
2579 | kfree(hold_mem_node); | |
2580 | hold_mem_node = NULL; | |
2581 | } | |
2582 | ||
2555f7bd AB |
2583 | memcpy(hold_p_mem_node, p_mem_node, sizeof(struct pci_resource)); |
2584 | p_mem_node->next = NULL; | |
1da177e4 | 2585 | |
2555f7bd AB |
2586 | /* set Pre Mem base and Limit registers */ |
2587 | temp_word = p_mem_node->base >> 16; | |
2588 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word); | |
1da177e4 | 2589 | |
2555f7bd AB |
2590 | temp_word = (p_mem_node->base + p_mem_node->length - 1) >> 16; |
2591 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word); | |
1da177e4 LT |
2592 | |
2593 | /* Adjust this to compensate for extra adjustment in first loop */ | |
2594 | irqs.barber_pole--; | |
2595 | ||
2596 | rc = 0; | |
2597 | ||
2598 | /* Here we actually find the devices and configure them */ | |
2599 | for (device = 0; (device <= 0x1F) && !rc; device++) { | |
2600 | irqs.barber_pole = (irqs.barber_pole + 1) & 0x03; | |
2601 | ||
2602 | ID = 0xFFFFFFFF; | |
2603 | pci_bus->number = hold_bus_node->base; | |
2604 | pci_bus_read_config_dword (pci_bus, PCI_DEVFN(device, 0), 0x00, &ID); | |
2605 | pci_bus->number = func->bus; | |
2606 | ||
2607 | if (ID != 0xFFFFFFFF) { /* device present */ | |
2608 | /* Setup slot structure. */ | |
2609 | new_slot = cpqhp_slot_create(hold_bus_node->base); | |
2610 | ||
2611 | if (new_slot == NULL) { | |
2612 | rc = -ENOMEM; | |
2613 | continue; | |
2614 | } | |
2615 | ||
2616 | new_slot->bus = hold_bus_node->base; | |
2617 | new_slot->device = device; | |
2618 | new_slot->function = 0; | |
2619 | new_slot->is_a_board = 1; | |
2620 | new_slot->status = 0; | |
2621 | ||
2622 | rc = configure_new_device(ctrl, new_slot, 1, &temp_resources); | |
2623 | dbg("configure_new_device rc=0x%x\n",rc); | |
2624 | } /* End of IF (device in slot?) */ | |
2625 | } /* End of FOR loop */ | |
2626 | ||
2627 | if (rc) | |
2628 | goto free_and_out; | |
2629 | /* save the interrupt routing information */ | |
2630 | if (resources->irqs) { | |
2631 | resources->irqs->interrupt[0] = irqs.interrupt[0]; | |
2632 | resources->irqs->interrupt[1] = irqs.interrupt[1]; | |
2633 | resources->irqs->interrupt[2] = irqs.interrupt[2]; | |
2634 | resources->irqs->interrupt[3] = irqs.interrupt[3]; | |
2635 | resources->irqs->valid_INT = irqs.valid_INT; | |
2636 | } else if (!behind_bridge) { | |
2637 | /* We need to hook up the interrupts here */ | |
2638 | for (cloop = 0; cloop < 4; cloop++) { | |
2639 | if (irqs.valid_INT & (0x01 << cloop)) { | |
2640 | rc = cpqhp_set_irq(func->bus, func->device, | |
2641 | 0x0A + cloop, irqs.interrupt[cloop]); | |
2642 | if (rc) | |
2643 | goto free_and_out; | |
2644 | } | |
2645 | } /* end of for loop */ | |
2646 | } | |
2647 | /* Return unused bus resources | |
2648 | * First use the temporary node to store information for | |
2649 | * the board */ | |
2650 | if (hold_bus_node && bus_node && temp_resources.bus_head) { | |
2651 | hold_bus_node->length = bus_node->base - hold_bus_node->base; | |
2652 | ||
2653 | hold_bus_node->next = func->bus_head; | |
2654 | func->bus_head = hold_bus_node; | |
2655 | ||
2656 | temp_byte = temp_resources.bus_head->base - 1; | |
2657 | ||
2658 | /* set subordinate bus */ | |
2659 | rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte); | |
2660 | ||
2661 | if (temp_resources.bus_head->length == 0) { | |
2662 | kfree(temp_resources.bus_head); | |
2663 | temp_resources.bus_head = NULL; | |
2664 | } else { | |
2665 | return_resource(&(resources->bus_head), temp_resources.bus_head); | |
2666 | } | |
2667 | } | |
2668 | ||
2669 | /* If we have IO space available and there is some left, | |
2670 | * return the unused portion */ | |
2671 | if (hold_IO_node && temp_resources.io_head) { | |
2672 | io_node = do_pre_bridge_resource_split(&(temp_resources.io_head), | |
2673 | &hold_IO_node, 0x1000); | |
2674 | ||
2675 | /* Check if we were able to split something off */ | |
2676 | if (io_node) { | |
2677 | hold_IO_node->base = io_node->base + io_node->length; | |
2678 | ||
2679 | temp_byte = (hold_IO_node->base) >> 8; | |
2680 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_IO_BASE, temp_byte); | |
2681 | ||
2682 | return_resource(&(resources->io_head), io_node); | |
2683 | } | |
2684 | ||
2685 | io_node = do_bridge_resource_split(&(temp_resources.io_head), 0x1000); | |
2686 | ||
2687 | /* Check if we were able to split something off */ | |
2688 | if (io_node) { | |
2689 | /* First use the temporary node to store | |
2690 | * information for the board */ | |
2691 | hold_IO_node->length = io_node->base - hold_IO_node->base; | |
2692 | ||
2693 | /* If we used any, add it to the board's list */ | |
2694 | if (hold_IO_node->length) { | |
2695 | hold_IO_node->next = func->io_head; | |
2696 | func->io_head = hold_IO_node; | |
2697 | ||
2698 | temp_byte = (io_node->base - 1) >> 8; | |
2699 | rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_IO_LIMIT, temp_byte); | |
2700 | ||
2701 | return_resource(&(resources->io_head), io_node); | |
2702 | } else { | |
2703 | /* it doesn't need any IO */ | |
2704 | temp_word = 0x0000; | |
2705 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_IO_LIMIT, temp_word); | |
2706 | ||
2707 | return_resource(&(resources->io_head), io_node); | |
2708 | kfree(hold_IO_node); | |
2709 | } | |
2710 | } else { | |
2711 | /* it used most of the range */ | |
2712 | hold_IO_node->next = func->io_head; | |
2713 | func->io_head = hold_IO_node; | |
2714 | } | |
2715 | } else if (hold_IO_node) { | |
2716 | /* it used the whole range */ | |
2717 | hold_IO_node->next = func->io_head; | |
2718 | func->io_head = hold_IO_node; | |
2719 | } | |
2720 | /* If we have memory space available and there is some left, | |
2721 | * return the unused portion */ | |
2722 | if (hold_mem_node && temp_resources.mem_head) { | |
2723 | mem_node = do_pre_bridge_resource_split(&(temp_resources. mem_head), | |
2724 | &hold_mem_node, 0x100000); | |
2725 | ||
2726 | /* Check if we were able to split something off */ | |
2727 | if (mem_node) { | |
2728 | hold_mem_node->base = mem_node->base + mem_node->length; | |
2729 | ||
2730 | temp_word = (hold_mem_node->base) >> 16; | |
2731 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_BASE, temp_word); | |
2732 | ||
2733 | return_resource(&(resources->mem_head), mem_node); | |
2734 | } | |
2735 | ||
2736 | mem_node = do_bridge_resource_split(&(temp_resources.mem_head), 0x100000); | |
2737 | ||
2738 | /* Check if we were able to split something off */ | |
2739 | if (mem_node) { | |
2740 | /* First use the temporary node to store | |
2741 | * information for the board */ | |
2742 | hold_mem_node->length = mem_node->base - hold_mem_node->base; | |
2743 | ||
2744 | if (hold_mem_node->length) { | |
2745 | hold_mem_node->next = func->mem_head; | |
2746 | func->mem_head = hold_mem_node; | |
2747 | ||
2748 | /* configure end address */ | |
2749 | temp_word = (mem_node->base - 1) >> 16; | |
2750 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word); | |
2751 | ||
2752 | /* Return unused resources to the pool */ | |
2753 | return_resource(&(resources->mem_head), mem_node); | |
2754 | } else { | |
2755 | /* it doesn't need any Mem */ | |
2756 | temp_word = 0x0000; | |
2757 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word); | |
2758 | ||
2759 | return_resource(&(resources->mem_head), mem_node); | |
2760 | kfree(hold_mem_node); | |
2761 | } | |
2762 | } else { | |
2763 | /* it used most of the range */ | |
2764 | hold_mem_node->next = func->mem_head; | |
2765 | func->mem_head = hold_mem_node; | |
2766 | } | |
2767 | } else if (hold_mem_node) { | |
2768 | /* it used the whole range */ | |
2769 | hold_mem_node->next = func->mem_head; | |
2770 | func->mem_head = hold_mem_node; | |
2771 | } | |
2772 | /* If we have prefetchable memory space available and there | |
2773 | * is some left at the end, return the unused portion */ | |
2774 | if (hold_p_mem_node && temp_resources.p_mem_head) { | |
2775 | p_mem_node = do_pre_bridge_resource_split(&(temp_resources.p_mem_head), | |
2776 | &hold_p_mem_node, 0x100000); | |
2777 | ||
2778 | /* Check if we were able to split something off */ | |
2779 | if (p_mem_node) { | |
2780 | hold_p_mem_node->base = p_mem_node->base + p_mem_node->length; | |
2781 | ||
2782 | temp_word = (hold_p_mem_node->base) >> 16; | |
2783 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word); | |
2784 | ||
2785 | return_resource(&(resources->p_mem_head), p_mem_node); | |
2786 | } | |
2787 | ||
2788 | p_mem_node = do_bridge_resource_split(&(temp_resources.p_mem_head), 0x100000); | |
2789 | ||
2790 | /* Check if we were able to split something off */ | |
2791 | if (p_mem_node) { | |
2792 | /* First use the temporary node to store | |
2793 | * information for the board */ | |
2794 | hold_p_mem_node->length = p_mem_node->base - hold_p_mem_node->base; | |
2795 | ||
2796 | /* If we used any, add it to the board's list */ | |
2797 | if (hold_p_mem_node->length) { | |
2798 | hold_p_mem_node->next = func->p_mem_head; | |
2799 | func->p_mem_head = hold_p_mem_node; | |
2800 | ||
2801 | temp_word = (p_mem_node->base - 1) >> 16; | |
2802 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word); | |
2803 | ||
2804 | return_resource(&(resources->p_mem_head), p_mem_node); | |
2805 | } else { | |
2806 | /* it doesn't need any PMem */ | |
2807 | temp_word = 0x0000; | |
2808 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word); | |
2809 | ||
2810 | return_resource(&(resources->p_mem_head), p_mem_node); | |
2811 | kfree(hold_p_mem_node); | |
2812 | } | |
2813 | } else { | |
2814 | /* it used the most of the range */ | |
2815 | hold_p_mem_node->next = func->p_mem_head; | |
2816 | func->p_mem_head = hold_p_mem_node; | |
2817 | } | |
2818 | } else if (hold_p_mem_node) { | |
2819 | /* it used the whole range */ | |
2820 | hold_p_mem_node->next = func->p_mem_head; | |
2821 | func->p_mem_head = hold_p_mem_node; | |
2822 | } | |
2823 | /* We should be configuring an IRQ and the bridge's base address | |
2824 | * registers if it needs them. Although we have never seen such | |
2825 | * a device */ | |
2826 | ||
2827 | /* enable card */ | |
2828 | command = 0x0157; /* = PCI_COMMAND_IO | | |
2829 | * PCI_COMMAND_MEMORY | | |
2830 | * PCI_COMMAND_MASTER | | |
2831 | * PCI_COMMAND_INVALIDATE | | |
2832 | * PCI_COMMAND_PARITY | | |
2833 | * PCI_COMMAND_SERR */ | |
2834 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_COMMAND, command); | |
2835 | ||
2836 | /* set Bridge Control Register */ | |
2837 | command = 0x07; /* = PCI_BRIDGE_CTL_PARITY | | |
2838 | * PCI_BRIDGE_CTL_SERR | | |
2839 | * PCI_BRIDGE_CTL_NO_ISA */ | |
2840 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_BRIDGE_CONTROL, command); | |
2841 | } else if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_NORMAL) { | |
2842 | /* Standard device */ | |
2843 | rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code); | |
2844 | ||
2845 | if (class_code == PCI_BASE_CLASS_DISPLAY) { | |
2846 | /* Display (video) adapter (not supported) */ | |
2847 | return DEVICE_TYPE_NOT_SUPPORTED; | |
2848 | } | |
2849 | /* Figure out IO and memory needs */ | |
2850 | for (cloop = 0x10; cloop <= 0x24; cloop += 4) { | |
2851 | temp_register = 0xFFFFFFFF; | |
2852 | ||
2853 | dbg("CND: bus=%d, devfn=%d, offset=%d\n", pci_bus->number, devfn, cloop); | |
2854 | rc = pci_bus_write_config_dword (pci_bus, devfn, cloop, temp_register); | |
2855 | ||
2856 | rc = pci_bus_read_config_dword (pci_bus, devfn, cloop, &temp_register); | |
2857 | dbg("CND: base = 0x%x\n", temp_register); | |
2858 | ||
2859 | if (temp_register) { /* If this register is implemented */ | |
2860 | if ((temp_register & 0x03L) == 0x01) { | |
2861 | /* Map IO */ | |
2862 | ||
2863 | /* set base = amount of IO space */ | |
2864 | base = temp_register & 0xFFFFFFFC; | |
2865 | base = ~base + 1; | |
2866 | ||
2867 | dbg("CND: length = 0x%x\n", base); | |
2868 | io_node = get_io_resource(&(resources->io_head), base); | |
2869 | dbg("Got io_node start = %8.8x, length = %8.8x next (%p)\n", | |
2870 | io_node->base, io_node->length, io_node->next); | |
2871 | dbg("func (%p) io_head (%p)\n", func, func->io_head); | |
2872 | ||
2873 | /* allocate the resource to the board */ | |
2874 | if (io_node) { | |
2875 | base = io_node->base; | |
2876 | ||
2877 | io_node->next = func->io_head; | |
2878 | func->io_head = io_node; | |
2879 | } else | |
2880 | return -ENOMEM; | |
2881 | } else if ((temp_register & 0x0BL) == 0x08) { | |
2882 | /* Map prefetchable memory */ | |
2883 | base = temp_register & 0xFFFFFFF0; | |
2884 | base = ~base + 1; | |
2885 | ||
2886 | dbg("CND: length = 0x%x\n", base); | |
2887 | p_mem_node = get_resource(&(resources->p_mem_head), base); | |
2888 | ||
2889 | /* allocate the resource to the board */ | |
2890 | if (p_mem_node) { | |
2891 | base = p_mem_node->base; | |
2892 | ||
2893 | p_mem_node->next = func->p_mem_head; | |
2894 | func->p_mem_head = p_mem_node; | |
2895 | } else | |
2896 | return -ENOMEM; | |
2897 | } else if ((temp_register & 0x0BL) == 0x00) { | |
2898 | /* Map memory */ | |
2899 | base = temp_register & 0xFFFFFFF0; | |
2900 | base = ~base + 1; | |
2901 | ||
2902 | dbg("CND: length = 0x%x\n", base); | |
2903 | mem_node = get_resource(&(resources->mem_head), base); | |
2904 | ||
2905 | /* allocate the resource to the board */ | |
2906 | if (mem_node) { | |
2907 | base = mem_node->base; | |
2908 | ||
2909 | mem_node->next = func->mem_head; | |
2910 | func->mem_head = mem_node; | |
2911 | } else | |
2912 | return -ENOMEM; | |
2913 | } else if ((temp_register & 0x0BL) == 0x04) { | |
2914 | /* Map memory */ | |
2915 | base = temp_register & 0xFFFFFFF0; | |
2916 | base = ~base + 1; | |
2917 | ||
2918 | dbg("CND: length = 0x%x\n", base); | |
2919 | mem_node = get_resource(&(resources->mem_head), base); | |
2920 | ||
2921 | /* allocate the resource to the board */ | |
2922 | if (mem_node) { | |
2923 | base = mem_node->base; | |
2924 | ||
2925 | mem_node->next = func->mem_head; | |
2926 | func->mem_head = mem_node; | |
2927 | } else | |
2928 | return -ENOMEM; | |
2929 | } else if ((temp_register & 0x0BL) == 0x06) { | |
2930 | /* Those bits are reserved, we can't handle this */ | |
2931 | return 1; | |
2932 | } else { | |
2933 | /* Requesting space below 1M */ | |
2934 | return NOT_ENOUGH_RESOURCES; | |
2935 | } | |
2936 | ||
2937 | rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, base); | |
2938 | ||
2939 | /* Check for 64-bit base */ | |
2940 | if ((temp_register & 0x07L) == 0x04) { | |
2941 | cloop += 4; | |
2942 | ||
2943 | /* Upper 32 bits of address always zero | |
2944 | * on today's systems */ | |
2945 | /* FIXME this is probably not true on | |
2946 | * Alpha and ia64??? */ | |
2947 | base = 0; | |
2948 | rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, base); | |
2949 | } | |
2950 | } | |
2951 | } /* End of base register loop */ | |
2952 | if (cpqhp_legacy_mode) { | |
2953 | /* Figure out which interrupt pin this function uses */ | |
2954 | rc = pci_bus_read_config_byte (pci_bus, devfn, | |
2955 | PCI_INTERRUPT_PIN, &temp_byte); | |
2956 | ||
2957 | /* If this function needs an interrupt and we are behind | |
2958 | * a bridge and the pin is tied to something that's | |
2959 | * alread mapped, set this one the same */ | |
2960 | if (temp_byte && resources->irqs && | |
2961 | (resources->irqs->valid_INT & | |
2962 | (0x01 << ((temp_byte + resources->irqs->barber_pole - 1) & 0x03)))) { | |
2963 | /* We have to share with something already set up */ | |
2964 | IRQ = resources->irqs->interrupt[(temp_byte + | |
2965 | resources->irqs->barber_pole - 1) & 0x03]; | |
2966 | } else { | |
2967 | /* Program IRQ based on card type */ | |
2968 | rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code); | |
2969 | ||
2970 | if (class_code == PCI_BASE_CLASS_STORAGE) { | |
2971 | IRQ = cpqhp_disk_irq; | |
2972 | } else { | |
2973 | IRQ = cpqhp_nic_irq; | |
2974 | } | |
2975 | } | |
2976 | ||
2977 | /* IRQ Line */ | |
2978 | rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_INTERRUPT_LINE, IRQ); | |
2979 | } | |
2980 | ||
2981 | if (!behind_bridge) { | |
2982 | rc = cpqhp_set_irq(func->bus, func->device, temp_byte + 0x09, IRQ); | |
2983 | if (rc) | |
2984 | return 1; | |
2985 | } else { | |
2986 | /* TBD - this code may also belong in the other clause | |
2987 | * of this If statement */ | |
2988 | resources->irqs->interrupt[(temp_byte + resources->irqs->barber_pole - 1) & 0x03] = IRQ; | |
2989 | resources->irqs->valid_INT |= 0x01 << (temp_byte + resources->irqs->barber_pole - 1) & 0x03; | |
2990 | } | |
2991 | ||
2992 | /* Latency Timer */ | |
2993 | temp_byte = 0x40; | |
2994 | rc = pci_bus_write_config_byte(pci_bus, devfn, | |
2995 | PCI_LATENCY_TIMER, temp_byte); | |
2996 | ||
2997 | /* Cache Line size */ | |
2998 | temp_byte = 0x08; | |
2999 | rc = pci_bus_write_config_byte(pci_bus, devfn, | |
3000 | PCI_CACHE_LINE_SIZE, temp_byte); | |
3001 | ||
3002 | /* disable ROM base Address */ | |
3003 | temp_dword = 0x00L; | |
3004 | rc = pci_bus_write_config_word(pci_bus, devfn, | |
3005 | PCI_ROM_ADDRESS, temp_dword); | |
3006 | ||
3007 | /* enable card */ | |
3008 | temp_word = 0x0157; /* = PCI_COMMAND_IO | | |
3009 | * PCI_COMMAND_MEMORY | | |
3010 | * PCI_COMMAND_MASTER | | |
3011 | * PCI_COMMAND_INVALIDATE | | |
3012 | * PCI_COMMAND_PARITY | | |
3013 | * PCI_COMMAND_SERR */ | |
3014 | rc = pci_bus_write_config_word (pci_bus, devfn, | |
3015 | PCI_COMMAND, temp_word); | |
3016 | } else { /* End of Not-A-Bridge else */ | |
3017 | /* It's some strange type of PCI adapter (Cardbus?) */ | |
3018 | return DEVICE_TYPE_NOT_SUPPORTED; | |
3019 | } | |
3020 | ||
3021 | func->configured = 1; | |
3022 | ||
3023 | return 0; | |
3024 | free_and_out: | |
3025 | cpqhp_destroy_resource_list (&temp_resources); | |
3026 | ||
3027 | return_resource(&(resources-> bus_head), hold_bus_node); | |
3028 | return_resource(&(resources-> io_head), hold_IO_node); | |
3029 | return_resource(&(resources-> mem_head), hold_mem_node); | |
3030 | return_resource(&(resources-> p_mem_head), hold_p_mem_node); | |
3031 | return rc; | |
3032 | } |