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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> |
fa007d8b | 40 | #include <linux/kthread.h> |
1da177e4 LT |
41 | #include "cpqphp.h" |
42 | ||
43 | static u32 configure_new_device(struct controller* ctrl, struct pci_func *func, | |
44 | u8 behind_bridge, struct resource_lists *resources); | |
45 | static int configure_new_function(struct controller* ctrl, struct pci_func *func, | |
46 | u8 behind_bridge, struct resource_lists *resources); | |
47 | static void interrupt_event_handler(struct controller *ctrl); | |
48 | ||
1da177e4 | 49 | |
fa007d8b CH |
50 | static struct task_struct *cpqhp_event_thread; |
51 | static unsigned long pushbutton_pending; /* = 0 */ | |
1da177e4 LT |
52 | |
53 | /* delay is in jiffies to wait for */ | |
54 | static void long_delay(int delay) | |
55 | { | |
fa007d8b CH |
56 | /* |
57 | * XXX(hch): if someone is bored please convert all callers | |
58 | * to call msleep_interruptible directly. They really want | |
59 | * to specify timeouts in natural units and spend a lot of | |
60 | * effort converting them to jiffies.. | |
1da177e4 | 61 | */ |
1da177e4 | 62 | msleep_interruptible(jiffies_to_msecs(delay)); |
1da177e4 LT |
63 | } |
64 | ||
65 | ||
66 | /* FIXME: The following line needs to be somewhere else... */ | |
67 | #define WRONG_BUS_FREQUENCY 0x07 | |
68 | static u8 handle_switch_change(u8 change, struct controller * ctrl) | |
69 | { | |
70 | int hp_slot; | |
71 | u8 rc = 0; | |
72 | u16 temp_word; | |
73 | struct pci_func *func; | |
74 | struct event_info *taskInfo; | |
75 | ||
76 | if (!change) | |
77 | return 0; | |
78 | ||
79 | /* Switch Change */ | |
80 | dbg("cpqsbd: Switch interrupt received.\n"); | |
81 | ||
82 | for (hp_slot = 0; hp_slot < 6; hp_slot++) { | |
83 | if (change & (0x1L << hp_slot)) { | |
84 | /********************************** | |
85 | * this one changed. | |
86 | **********************************/ | |
87 | func = cpqhp_slot_find(ctrl->bus, | |
88 | (hp_slot + ctrl->slot_device_offset), 0); | |
89 | ||
90 | /* this is the structure that tells the worker thread | |
91 | *what to do */ | |
92 | taskInfo = &(ctrl->event_queue[ctrl->next_event]); | |
93 | ctrl->next_event = (ctrl->next_event + 1) % 10; | |
94 | taskInfo->hp_slot = hp_slot; | |
95 | ||
96 | rc++; | |
97 | ||
98 | temp_word = ctrl->ctrl_int_comp >> 16; | |
99 | func->presence_save = (temp_word >> hp_slot) & 0x01; | |
100 | func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02; | |
101 | ||
102 | if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) { | |
103 | /********************************** | |
104 | * Switch opened | |
105 | **********************************/ | |
106 | ||
107 | func->switch_save = 0; | |
108 | ||
109 | taskInfo->event_type = INT_SWITCH_OPEN; | |
110 | } else { | |
111 | /********************************** | |
112 | * Switch closed | |
113 | **********************************/ | |
114 | ||
115 | func->switch_save = 0x10; | |
116 | ||
117 | taskInfo->event_type = INT_SWITCH_CLOSE; | |
118 | } | |
119 | } | |
120 | } | |
121 | ||
122 | return rc; | |
123 | } | |
124 | ||
125 | /** | |
26e6c66e | 126 | * cpqhp_find_slot - find the struct slot of given device |
1da177e4 LT |
127 | * @ctrl: scan lots of this controller |
128 | * @device: the device id to find | |
129 | */ | |
130 | static struct slot *cpqhp_find_slot(struct controller *ctrl, u8 device) | |
131 | { | |
132 | struct slot *slot = ctrl->slot; | |
133 | ||
134 | while (slot && (slot->device != device)) { | |
135 | slot = slot->next; | |
136 | } | |
137 | ||
138 | return slot; | |
139 | } | |
140 | ||
141 | ||
142 | static u8 handle_presence_change(u16 change, struct controller * ctrl) | |
143 | { | |
144 | int hp_slot; | |
145 | u8 rc = 0; | |
146 | u8 temp_byte; | |
147 | u16 temp_word; | |
148 | struct pci_func *func; | |
149 | struct event_info *taskInfo; | |
150 | struct slot *p_slot; | |
151 | ||
152 | if (!change) | |
153 | return 0; | |
154 | ||
155 | /********************************** | |
156 | * Presence Change | |
157 | **********************************/ | |
158 | dbg("cpqsbd: Presence/Notify input change.\n"); | |
159 | dbg(" Changed bits are 0x%4.4x\n", change ); | |
160 | ||
161 | for (hp_slot = 0; hp_slot < 6; hp_slot++) { | |
162 | if (change & (0x0101 << hp_slot)) { | |
163 | /********************************** | |
164 | * this one changed. | |
165 | **********************************/ | |
166 | func = cpqhp_slot_find(ctrl->bus, | |
167 | (hp_slot + ctrl->slot_device_offset), 0); | |
168 | ||
169 | taskInfo = &(ctrl->event_queue[ctrl->next_event]); | |
170 | ctrl->next_event = (ctrl->next_event + 1) % 10; | |
171 | taskInfo->hp_slot = hp_slot; | |
172 | ||
173 | rc++; | |
174 | ||
175 | p_slot = cpqhp_find_slot(ctrl, hp_slot + (readb(ctrl->hpc_reg + SLOT_MASK) >> 4)); | |
176 | if (!p_slot) | |
177 | return 0; | |
178 | ||
179 | /* If the switch closed, must be a button | |
180 | * If not in button mode, nevermind */ | |
181 | if (func->switch_save && (ctrl->push_button == 1)) { | |
182 | temp_word = ctrl->ctrl_int_comp >> 16; | |
183 | temp_byte = (temp_word >> hp_slot) & 0x01; | |
184 | temp_byte |= (temp_word >> (hp_slot + 7)) & 0x02; | |
185 | ||
186 | if (temp_byte != func->presence_save) { | |
187 | /************************************** | |
188 | * button Pressed (doesn't do anything) | |
189 | **************************************/ | |
190 | dbg("hp_slot %d button pressed\n", hp_slot); | |
191 | taskInfo->event_type = INT_BUTTON_PRESS; | |
192 | } else { | |
193 | /********************************** | |
194 | * button Released - TAKE ACTION!!!! | |
195 | **********************************/ | |
196 | dbg("hp_slot %d button released\n", hp_slot); | |
197 | taskInfo->event_type = INT_BUTTON_RELEASE; | |
198 | ||
199 | /* Cancel if we are still blinking */ | |
200 | if ((p_slot->state == BLINKINGON_STATE) | |
201 | || (p_slot->state == BLINKINGOFF_STATE)) { | |
202 | taskInfo->event_type = INT_BUTTON_CANCEL; | |
203 | dbg("hp_slot %d button cancel\n", hp_slot); | |
204 | } else if ((p_slot->state == POWERON_STATE) | |
205 | || (p_slot->state == POWEROFF_STATE)) { | |
206 | /* info(msg_button_ignore, p_slot->number); */ | |
207 | taskInfo->event_type = INT_BUTTON_IGNORE; | |
208 | dbg("hp_slot %d button ignore\n", hp_slot); | |
209 | } | |
210 | } | |
211 | } else { | |
212 | /* Switch is open, assume a presence change | |
213 | * Save the presence state */ | |
214 | temp_word = ctrl->ctrl_int_comp >> 16; | |
215 | func->presence_save = (temp_word >> hp_slot) & 0x01; | |
216 | func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02; | |
217 | ||
218 | if ((!(ctrl->ctrl_int_comp & (0x010000 << hp_slot))) || | |
219 | (!(ctrl->ctrl_int_comp & (0x01000000 << hp_slot)))) { | |
220 | /* Present */ | |
221 | taskInfo->event_type = INT_PRESENCE_ON; | |
222 | } else { | |
223 | /* Not Present */ | |
224 | taskInfo->event_type = INT_PRESENCE_OFF; | |
225 | } | |
226 | } | |
227 | } | |
228 | } | |
229 | ||
230 | return rc; | |
231 | } | |
232 | ||
233 | ||
234 | static u8 handle_power_fault(u8 change, struct controller * ctrl) | |
235 | { | |
236 | int hp_slot; | |
237 | u8 rc = 0; | |
238 | struct pci_func *func; | |
239 | struct event_info *taskInfo; | |
240 | ||
241 | if (!change) | |
242 | return 0; | |
243 | ||
244 | /********************************** | |
245 | * power fault | |
246 | **********************************/ | |
247 | ||
248 | info("power fault interrupt\n"); | |
249 | ||
250 | for (hp_slot = 0; hp_slot < 6; hp_slot++) { | |
251 | if (change & (0x01 << hp_slot)) { | |
252 | /********************************** | |
253 | * this one changed. | |
254 | **********************************/ | |
255 | func = cpqhp_slot_find(ctrl->bus, | |
256 | (hp_slot + ctrl->slot_device_offset), 0); | |
257 | ||
258 | taskInfo = &(ctrl->event_queue[ctrl->next_event]); | |
259 | ctrl->next_event = (ctrl->next_event + 1) % 10; | |
260 | taskInfo->hp_slot = hp_slot; | |
261 | ||
262 | rc++; | |
263 | ||
264 | if (ctrl->ctrl_int_comp & (0x00000100 << hp_slot)) { | |
265 | /********************************** | |
266 | * power fault Cleared | |
267 | **********************************/ | |
268 | func->status = 0x00; | |
269 | ||
270 | taskInfo->event_type = INT_POWER_FAULT_CLEAR; | |
271 | } else { | |
272 | /********************************** | |
273 | * power fault | |
274 | **********************************/ | |
275 | taskInfo->event_type = INT_POWER_FAULT; | |
276 | ||
277 | if (ctrl->rev < 4) { | |
278 | amber_LED_on (ctrl, hp_slot); | |
279 | green_LED_off (ctrl, hp_slot); | |
280 | set_SOGO (ctrl); | |
281 | ||
282 | /* this is a fatal condition, we want | |
283 | * to crash the machine to protect from | |
284 | * data corruption. simulated_NMI | |
285 | * shouldn't ever return */ | |
286 | /* FIXME | |
287 | simulated_NMI(hp_slot, ctrl); */ | |
288 | ||
289 | /* The following code causes a software | |
290 | * crash just in case simulated_NMI did | |
291 | * return */ | |
292 | /*FIXME | |
293 | panic(msg_power_fault); */ | |
294 | } else { | |
295 | /* set power fault status for this board */ | |
296 | func->status = 0xFF; | |
297 | info("power fault bit %x set\n", hp_slot); | |
298 | } | |
299 | } | |
300 | } | |
301 | } | |
302 | ||
303 | return rc; | |
304 | } | |
305 | ||
306 | ||
307 | /** | |
26e6c66e | 308 | * sort_by_size - sort nodes on the list by their length, smallest first. |
1da177e4 | 309 | * @head: list to sort |
1da177e4 LT |
310 | */ |
311 | static int sort_by_size(struct pci_resource **head) | |
312 | { | |
313 | struct pci_resource *current_res; | |
314 | struct pci_resource *next_res; | |
315 | int out_of_order = 1; | |
316 | ||
317 | if (!(*head)) | |
318 | return 1; | |
319 | ||
320 | if (!((*head)->next)) | |
321 | return 0; | |
322 | ||
323 | while (out_of_order) { | |
324 | out_of_order = 0; | |
325 | ||
326 | /* Special case for swapping list head */ | |
327 | if (((*head)->next) && | |
328 | ((*head)->length > (*head)->next->length)) { | |
329 | out_of_order++; | |
330 | current_res = *head; | |
331 | *head = (*head)->next; | |
332 | current_res->next = (*head)->next; | |
333 | (*head)->next = current_res; | |
334 | } | |
335 | ||
336 | current_res = *head; | |
337 | ||
338 | while (current_res->next && current_res->next->next) { | |
339 | if (current_res->next->length > current_res->next->next->length) { | |
340 | out_of_order++; | |
341 | next_res = current_res->next; | |
342 | current_res->next = current_res->next->next; | |
343 | current_res = current_res->next; | |
344 | next_res->next = current_res->next; | |
345 | current_res->next = next_res; | |
346 | } else | |
347 | current_res = current_res->next; | |
348 | } | |
349 | } /* End of out_of_order loop */ | |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
354 | ||
355 | /** | |
26e6c66e | 356 | * sort_by_max_size - sort nodes on the list by their length, largest first. |
1da177e4 | 357 | * @head: list to sort |
1da177e4 LT |
358 | */ |
359 | static int sort_by_max_size(struct pci_resource **head) | |
360 | { | |
361 | struct pci_resource *current_res; | |
362 | struct pci_resource *next_res; | |
363 | int out_of_order = 1; | |
364 | ||
365 | if (!(*head)) | |
366 | return 1; | |
367 | ||
368 | if (!((*head)->next)) | |
369 | return 0; | |
370 | ||
371 | while (out_of_order) { | |
372 | out_of_order = 0; | |
373 | ||
374 | /* Special case for swapping list head */ | |
375 | if (((*head)->next) && | |
376 | ((*head)->length < (*head)->next->length)) { | |
377 | out_of_order++; | |
378 | current_res = *head; | |
379 | *head = (*head)->next; | |
380 | current_res->next = (*head)->next; | |
381 | (*head)->next = current_res; | |
382 | } | |
383 | ||
384 | current_res = *head; | |
385 | ||
386 | while (current_res->next && current_res->next->next) { | |
387 | if (current_res->next->length < current_res->next->next->length) { | |
388 | out_of_order++; | |
389 | next_res = current_res->next; | |
390 | current_res->next = current_res->next->next; | |
391 | current_res = current_res->next; | |
392 | next_res->next = current_res->next; | |
393 | current_res->next = next_res; | |
394 | } else | |
395 | current_res = current_res->next; | |
396 | } | |
397 | } /* End of out_of_order loop */ | |
398 | ||
399 | return 0; | |
400 | } | |
401 | ||
402 | ||
403 | /** | |
26e6c66e RD |
404 | * do_pre_bridge_resource_split - find node of resources that are unused |
405 | * @head: new list head | |
406 | * @orig_head: original list head | |
407 | * @alignment: max node size (?) | |
1da177e4 LT |
408 | */ |
409 | static struct pci_resource *do_pre_bridge_resource_split(struct pci_resource **head, | |
410 | struct pci_resource **orig_head, u32 alignment) | |
411 | { | |
412 | struct pci_resource *prevnode = NULL; | |
413 | struct pci_resource *node; | |
414 | struct pci_resource *split_node; | |
415 | u32 rc; | |
416 | u32 temp_dword; | |
417 | dbg("do_pre_bridge_resource_split\n"); | |
418 | ||
419 | if (!(*head) || !(*orig_head)) | |
420 | return NULL; | |
421 | ||
422 | rc = cpqhp_resource_sort_and_combine(head); | |
423 | ||
424 | if (rc) | |
425 | return NULL; | |
426 | ||
427 | if ((*head)->base != (*orig_head)->base) | |
428 | return NULL; | |
429 | ||
430 | if ((*head)->length == (*orig_head)->length) | |
431 | return NULL; | |
432 | ||
433 | ||
434 | /* If we got here, there the bridge requires some of the resource, but | |
435 | * we may be able to split some off of the front */ | |
436 | ||
437 | node = *head; | |
438 | ||
439 | if (node->length & (alignment -1)) { | |
440 | /* this one isn't an aligned length, so we'll make a new entry | |
441 | * and split it up. */ | |
442 | split_node = kmalloc(sizeof(*split_node), GFP_KERNEL); | |
443 | ||
444 | if (!split_node) | |
445 | return NULL; | |
446 | ||
447 | temp_dword = (node->length | (alignment-1)) + 1 - alignment; | |
448 | ||
449 | split_node->base = node->base; | |
450 | split_node->length = temp_dword; | |
451 | ||
452 | node->length -= temp_dword; | |
453 | node->base += split_node->length; | |
454 | ||
455 | /* Put it in the list */ | |
456 | *head = split_node; | |
457 | split_node->next = node; | |
458 | } | |
459 | ||
460 | if (node->length < alignment) | |
461 | return NULL; | |
462 | ||
463 | /* Now unlink it */ | |
464 | if (*head == node) { | |
465 | *head = node->next; | |
466 | } else { | |
467 | prevnode = *head; | |
468 | while (prevnode->next != node) | |
469 | prevnode = prevnode->next; | |
470 | ||
471 | prevnode->next = node->next; | |
472 | } | |
473 | node->next = NULL; | |
474 | ||
475 | return node; | |
476 | } | |
477 | ||
478 | ||
479 | /** | |
26e6c66e RD |
480 | * do_bridge_resource_split - find one node of resources that aren't in use |
481 | * @head: list head | |
482 | * @alignment: max node size (?) | |
1da177e4 LT |
483 | */ |
484 | static struct pci_resource *do_bridge_resource_split(struct pci_resource **head, u32 alignment) | |
485 | { | |
486 | struct pci_resource *prevnode = NULL; | |
487 | struct pci_resource *node; | |
488 | u32 rc; | |
489 | u32 temp_dword; | |
490 | ||
491 | rc = cpqhp_resource_sort_and_combine(head); | |
492 | ||
493 | if (rc) | |
494 | return NULL; | |
495 | ||
496 | node = *head; | |
497 | ||
498 | while (node->next) { | |
499 | prevnode = node; | |
500 | node = node->next; | |
501 | kfree(prevnode); | |
502 | } | |
503 | ||
504 | if (node->length < alignment) | |
505 | goto error; | |
506 | ||
507 | if (node->base & (alignment - 1)) { | |
508 | /* Short circuit if adjusted size is too small */ | |
509 | temp_dword = (node->base | (alignment-1)) + 1; | |
510 | if ((node->length - (temp_dword - node->base)) < alignment) | |
511 | goto error; | |
512 | ||
513 | node->length -= (temp_dword - node->base); | |
514 | node->base = temp_dword; | |
515 | } | |
516 | ||
517 | if (node->length & (alignment - 1)) | |
518 | /* There's stuff in use after this node */ | |
519 | goto error; | |
520 | ||
521 | return node; | |
522 | error: | |
523 | kfree(node); | |
524 | return NULL; | |
525 | } | |
526 | ||
527 | ||
528 | /** | |
26e6c66e | 529 | * get_io_resource - find first node of given size not in ISA aliasing window. |
1da177e4 LT |
530 | * @head: list to search |
531 | * @size: size of node to find, must be a power of two. | |
532 | * | |
26e6c66e | 533 | * Description: This function sorts the resource list by size and then returns |
1da177e4 LT |
534 | * returns the first node of "size" length that is not in the ISA aliasing |
535 | * window. If it finds a node larger than "size" it will split it up. | |
1da177e4 LT |
536 | */ |
537 | static struct pci_resource *get_io_resource(struct pci_resource **head, u32 size) | |
538 | { | |
539 | struct pci_resource *prevnode; | |
540 | struct pci_resource *node; | |
541 | struct pci_resource *split_node; | |
542 | u32 temp_dword; | |
543 | ||
544 | if (!(*head)) | |
545 | return NULL; | |
546 | ||
547 | if ( cpqhp_resource_sort_and_combine(head) ) | |
548 | return NULL; | |
549 | ||
550 | if ( sort_by_size(head) ) | |
551 | return NULL; | |
552 | ||
553 | for (node = *head; node; node = node->next) { | |
554 | if (node->length < size) | |
555 | continue; | |
556 | ||
557 | if (node->base & (size - 1)) { | |
558 | /* this one isn't base aligned properly | |
559 | * so we'll make a new entry and split it up */ | |
560 | temp_dword = (node->base | (size-1)) + 1; | |
561 | ||
562 | /* Short circuit if adjusted size is too small */ | |
563 | if ((node->length - (temp_dword - node->base)) < size) | |
564 | continue; | |
565 | ||
566 | split_node = kmalloc(sizeof(*split_node), GFP_KERNEL); | |
567 | ||
568 | if (!split_node) | |
569 | return NULL; | |
570 | ||
571 | split_node->base = node->base; | |
572 | split_node->length = temp_dword - node->base; | |
573 | node->base = temp_dword; | |
574 | node->length -= split_node->length; | |
575 | ||
576 | /* Put it in the list */ | |
577 | split_node->next = node->next; | |
578 | node->next = split_node; | |
579 | } /* End of non-aligned base */ | |
580 | ||
581 | /* Don't need to check if too small since we already did */ | |
582 | if (node->length > size) { | |
583 | /* this one is longer than we need | |
584 | * so we'll make a new entry and split it up */ | |
585 | split_node = kmalloc(sizeof(*split_node), GFP_KERNEL); | |
586 | ||
587 | if (!split_node) | |
588 | return NULL; | |
589 | ||
590 | split_node->base = node->base + size; | |
591 | split_node->length = node->length - size; | |
592 | node->length = size; | |
593 | ||
594 | /* Put it in the list */ | |
595 | split_node->next = node->next; | |
596 | node->next = split_node; | |
597 | } /* End of too big on top end */ | |
598 | ||
599 | /* For IO make sure it's not in the ISA aliasing space */ | |
600 | if (node->base & 0x300L) | |
601 | continue; | |
602 | ||
603 | /* If we got here, then it is the right size | |
604 | * Now take it out of the list and break */ | |
605 | if (*head == node) { | |
606 | *head = node->next; | |
607 | } else { | |
608 | prevnode = *head; | |
609 | while (prevnode->next != node) | |
610 | prevnode = prevnode->next; | |
611 | ||
612 | prevnode->next = node->next; | |
613 | } | |
614 | node->next = NULL; | |
615 | break; | |
616 | } | |
617 | ||
618 | return node; | |
619 | } | |
620 | ||
621 | ||
622 | /** | |
26e6c66e | 623 | * get_max_resource - get largest node which has at least the given size. |
1da177e4 LT |
624 | * @head: the list to search the node in |
625 | * @size: the minimum size of the node to find | |
626 | * | |
627 | * Description: Gets the largest node that is at least "size" big from the | |
628 | * list pointed to by head. It aligns the node on top and bottom | |
629 | * to "size" alignment before returning it. | |
630 | */ | |
631 | static struct pci_resource *get_max_resource(struct pci_resource **head, u32 size) | |
632 | { | |
633 | struct pci_resource *max; | |
634 | struct pci_resource *temp; | |
635 | struct pci_resource *split_node; | |
636 | u32 temp_dword; | |
637 | ||
638 | if (cpqhp_resource_sort_and_combine(head)) | |
639 | return NULL; | |
640 | ||
641 | if (sort_by_max_size(head)) | |
642 | return NULL; | |
643 | ||
644 | for (max = *head; max; max = max->next) { | |
645 | /* If not big enough we could probably just bail, | |
646 | * instead we'll continue to the next. */ | |
647 | if (max->length < size) | |
648 | continue; | |
649 | ||
650 | if (max->base & (size - 1)) { | |
651 | /* this one isn't base aligned properly | |
652 | * so we'll make a new entry and split it up */ | |
653 | temp_dword = (max->base | (size-1)) + 1; | |
654 | ||
655 | /* Short circuit if adjusted size is too small */ | |
656 | if ((max->length - (temp_dword - max->base)) < size) | |
657 | continue; | |
658 | ||
659 | split_node = kmalloc(sizeof(*split_node), GFP_KERNEL); | |
660 | ||
661 | if (!split_node) | |
662 | return NULL; | |
663 | ||
664 | split_node->base = max->base; | |
665 | split_node->length = temp_dword - max->base; | |
666 | max->base = temp_dword; | |
667 | max->length -= split_node->length; | |
668 | ||
669 | split_node->next = max->next; | |
670 | max->next = split_node; | |
671 | } | |
672 | ||
673 | if ((max->base + max->length) & (size - 1)) { | |
674 | /* this one isn't end aligned properly at the top | |
675 | * so we'll make a new entry and split it up */ | |
676 | split_node = kmalloc(sizeof(*split_node), GFP_KERNEL); | |
677 | ||
678 | if (!split_node) | |
679 | return NULL; | |
680 | temp_dword = ((max->base + max->length) & ~(size - 1)); | |
681 | split_node->base = temp_dword; | |
682 | split_node->length = max->length + max->base | |
683 | - split_node->base; | |
684 | max->length -= split_node->length; | |
685 | ||
686 | split_node->next = max->next; | |
687 | max->next = split_node; | |
688 | } | |
689 | ||
690 | /* Make sure it didn't shrink too much when we aligned it */ | |
691 | if (max->length < size) | |
692 | continue; | |
693 | ||
694 | /* Now take it out of the list */ | |
695 | temp = *head; | |
696 | if (temp == max) { | |
697 | *head = max->next; | |
698 | } else { | |
699 | while (temp && temp->next != max) { | |
700 | temp = temp->next; | |
701 | } | |
702 | ||
703 | temp->next = max->next; | |
704 | } | |
705 | ||
706 | max->next = NULL; | |
707 | break; | |
708 | } | |
709 | ||
710 | return max; | |
711 | } | |
712 | ||
713 | ||
714 | /** | |
26e6c66e | 715 | * get_resource - find resource of given size and split up larger ones. |
1da177e4 LT |
716 | * @head: the list to search for resources |
717 | * @size: the size limit to use | |
718 | * | |
719 | * Description: This function sorts the resource list by size and then | |
720 | * returns the first node of "size" length. If it finds a node | |
721 | * larger than "size" it will split it up. | |
722 | * | |
723 | * size must be a power of two. | |
724 | */ | |
725 | static struct pci_resource *get_resource(struct pci_resource **head, u32 size) | |
726 | { | |
727 | struct pci_resource *prevnode; | |
728 | struct pci_resource *node; | |
729 | struct pci_resource *split_node; | |
730 | u32 temp_dword; | |
731 | ||
732 | if (cpqhp_resource_sort_and_combine(head)) | |
733 | return NULL; | |
734 | ||
735 | if (sort_by_size(head)) | |
736 | return NULL; | |
737 | ||
738 | for (node = *head; node; node = node->next) { | |
739 | dbg("%s: req_size =%x node=%p, base=%x, length=%x\n", | |
66bef8c0 | 740 | __func__, size, node, node->base, node->length); |
1da177e4 LT |
741 | if (node->length < size) |
742 | continue; | |
743 | ||
744 | if (node->base & (size - 1)) { | |
66bef8c0 | 745 | dbg("%s: not aligned\n", __func__); |
1da177e4 LT |
746 | /* this one isn't base aligned properly |
747 | * so we'll make a new entry and split it up */ | |
748 | temp_dword = (node->base | (size-1)) + 1; | |
749 | ||
750 | /* Short circuit if adjusted size is too small */ | |
751 | if ((node->length - (temp_dword - node->base)) < size) | |
752 | continue; | |
753 | ||
754 | split_node = kmalloc(sizeof(*split_node), GFP_KERNEL); | |
755 | ||
756 | if (!split_node) | |
757 | return NULL; | |
758 | ||
759 | split_node->base = node->base; | |
760 | split_node->length = temp_dword - node->base; | |
761 | node->base = temp_dword; | |
762 | node->length -= split_node->length; | |
763 | ||
764 | split_node->next = node->next; | |
765 | node->next = split_node; | |
766 | } /* End of non-aligned base */ | |
767 | ||
768 | /* Don't need to check if too small since we already did */ | |
769 | if (node->length > size) { | |
66bef8c0 | 770 | dbg("%s: too big\n", __func__); |
1da177e4 LT |
771 | /* this one is longer than we need |
772 | * so we'll make a new entry and split it up */ | |
773 | split_node = kmalloc(sizeof(*split_node), GFP_KERNEL); | |
774 | ||
775 | if (!split_node) | |
776 | return NULL; | |
777 | ||
778 | split_node->base = node->base + size; | |
779 | split_node->length = node->length - size; | |
780 | node->length = size; | |
781 | ||
782 | /* Put it in the list */ | |
783 | split_node->next = node->next; | |
784 | node->next = split_node; | |
785 | } /* End of too big on top end */ | |
786 | ||
66bef8c0 | 787 | dbg("%s: got one!!!\n", __func__); |
1da177e4 LT |
788 | /* If we got here, then it is the right size |
789 | * Now take it out of the list */ | |
790 | if (*head == node) { | |
791 | *head = node->next; | |
792 | } else { | |
793 | prevnode = *head; | |
794 | while (prevnode->next != node) | |
795 | prevnode = prevnode->next; | |
796 | ||
797 | prevnode->next = node->next; | |
798 | } | |
799 | node->next = NULL; | |
800 | break; | |
801 | } | |
802 | return node; | |
803 | } | |
804 | ||
805 | ||
806 | /** | |
26e6c66e | 807 | * cpqhp_resource_sort_and_combine - sort nodes by base addresses and clean up |
1da177e4 LT |
808 | * @head: the list to sort and clean up |
809 | * | |
810 | * Description: Sorts all of the nodes in the list in ascending order by | |
811 | * their base addresses. Also does garbage collection by | |
812 | * combining adjacent nodes. | |
813 | * | |
26e6c66e | 814 | * Returns %0 if success. |
1da177e4 LT |
815 | */ |
816 | int cpqhp_resource_sort_and_combine(struct pci_resource **head) | |
817 | { | |
818 | struct pci_resource *node1; | |
819 | struct pci_resource *node2; | |
820 | int out_of_order = 1; | |
821 | ||
66bef8c0 | 822 | dbg("%s: head = %p, *head = %p\n", __func__, head, *head); |
1da177e4 LT |
823 | |
824 | if (!(*head)) | |
825 | return 1; | |
826 | ||
827 | dbg("*head->next = %p\n",(*head)->next); | |
828 | ||
829 | if (!(*head)->next) | |
830 | return 0; /* only one item on the list, already sorted! */ | |
831 | ||
832 | dbg("*head->base = 0x%x\n",(*head)->base); | |
833 | dbg("*head->next->base = 0x%x\n",(*head)->next->base); | |
834 | while (out_of_order) { | |
835 | out_of_order = 0; | |
836 | ||
837 | /* Special case for swapping list head */ | |
838 | if (((*head)->next) && | |
839 | ((*head)->base > (*head)->next->base)) { | |
840 | node1 = *head; | |
841 | (*head) = (*head)->next; | |
842 | node1->next = (*head)->next; | |
843 | (*head)->next = node1; | |
844 | out_of_order++; | |
845 | } | |
846 | ||
847 | node1 = (*head); | |
848 | ||
849 | while (node1->next && node1->next->next) { | |
850 | if (node1->next->base > node1->next->next->base) { | |
851 | out_of_order++; | |
852 | node2 = node1->next; | |
853 | node1->next = node1->next->next; | |
854 | node1 = node1->next; | |
855 | node2->next = node1->next; | |
856 | node1->next = node2; | |
857 | } else | |
858 | node1 = node1->next; | |
859 | } | |
860 | } /* End of out_of_order loop */ | |
861 | ||
862 | node1 = *head; | |
863 | ||
864 | while (node1 && node1->next) { | |
865 | if ((node1->base + node1->length) == node1->next->base) { | |
866 | /* Combine */ | |
867 | dbg("8..\n"); | |
868 | node1->length += node1->next->length; | |
869 | node2 = node1->next; | |
870 | node1->next = node1->next->next; | |
871 | kfree(node2); | |
872 | } else | |
873 | node1 = node1->next; | |
874 | } | |
875 | ||
876 | return 0; | |
877 | } | |
878 | ||
879 | ||
7d12e780 | 880 | irqreturn_t cpqhp_ctrl_intr(int IRQ, void *data) |
1da177e4 LT |
881 | { |
882 | struct controller *ctrl = data; | |
883 | u8 schedule_flag = 0; | |
884 | u8 reset; | |
885 | u16 misc; | |
886 | u32 Diff; | |
887 | u32 temp_dword; | |
888 | ||
889 | ||
890 | misc = readw(ctrl->hpc_reg + MISC); | |
891 | /*************************************** | |
892 | * Check to see if it was our interrupt | |
893 | ***************************************/ | |
894 | if (!(misc & 0x000C)) { | |
895 | return IRQ_NONE; | |
896 | } | |
897 | ||
898 | if (misc & 0x0004) { | |
899 | /********************************** | |
900 | * Serial Output interrupt Pending | |
901 | **********************************/ | |
902 | ||
903 | /* Clear the interrupt */ | |
904 | misc |= 0x0004; | |
905 | writew(misc, ctrl->hpc_reg + MISC); | |
906 | ||
907 | /* Read to clear posted writes */ | |
908 | misc = readw(ctrl->hpc_reg + MISC); | |
909 | ||
66bef8c0 | 910 | dbg ("%s - waking up\n", __func__); |
1da177e4 LT |
911 | wake_up_interruptible(&ctrl->queue); |
912 | } | |
913 | ||
914 | if (misc & 0x0008) { | |
915 | /* General-interrupt-input interrupt Pending */ | |
916 | Diff = readl(ctrl->hpc_reg + INT_INPUT_CLEAR) ^ ctrl->ctrl_int_comp; | |
917 | ||
918 | ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR); | |
919 | ||
920 | /* Clear the interrupt */ | |
921 | writel(Diff, ctrl->hpc_reg + INT_INPUT_CLEAR); | |
922 | ||
923 | /* Read it back to clear any posted writes */ | |
924 | temp_dword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR); | |
925 | ||
926 | if (!Diff) | |
927 | /* Clear all interrupts */ | |
928 | writel(0xFFFFFFFF, ctrl->hpc_reg + INT_INPUT_CLEAR); | |
929 | ||
930 | schedule_flag += handle_switch_change((u8)(Diff & 0xFFL), ctrl); | |
931 | schedule_flag += handle_presence_change((u16)((Diff & 0xFFFF0000L) >> 16), ctrl); | |
932 | schedule_flag += handle_power_fault((u8)((Diff & 0xFF00L) >> 8), ctrl); | |
933 | } | |
934 | ||
935 | reset = readb(ctrl->hpc_reg + RESET_FREQ_MODE); | |
936 | if (reset & 0x40) { | |
937 | /* Bus reset has completed */ | |
938 | reset &= 0xCF; | |
939 | writeb(reset, ctrl->hpc_reg + RESET_FREQ_MODE); | |
940 | reset = readb(ctrl->hpc_reg + RESET_FREQ_MODE); | |
941 | wake_up_interruptible(&ctrl->queue); | |
942 | } | |
943 | ||
944 | if (schedule_flag) { | |
fa007d8b CH |
945 | wake_up_process(cpqhp_event_thread); |
946 | dbg("Waking even thread"); | |
1da177e4 LT |
947 | } |
948 | return IRQ_HANDLED; | |
949 | } | |
950 | ||
951 | ||
952 | /** | |
953 | * cpqhp_slot_create - Creates a node and adds it to the proper bus. | |
26e6c66e | 954 | * @busnumber: bus where new node is to be located |
1da177e4 | 955 | * |
26e6c66e | 956 | * Returns pointer to the new node or %NULL if unsuccessful. |
1da177e4 LT |
957 | */ |
958 | struct pci_func *cpqhp_slot_create(u8 busnumber) | |
959 | { | |
960 | struct pci_func *new_slot; | |
961 | struct pci_func *next; | |
962 | ||
73a985a1 | 963 | new_slot = kzalloc(sizeof(*new_slot), GFP_KERNEL); |
1da177e4 LT |
964 | if (new_slot == NULL) { |
965 | /* I'm not dead yet! | |
966 | * You will be. */ | |
967 | return new_slot; | |
968 | } | |
969 | ||
1da177e4 LT |
970 | new_slot->next = NULL; |
971 | new_slot->configured = 1; | |
972 | ||
973 | if (cpqhp_slot_list[busnumber] == NULL) { | |
974 | cpqhp_slot_list[busnumber] = new_slot; | |
975 | } else { | |
976 | next = cpqhp_slot_list[busnumber]; | |
977 | while (next->next != NULL) | |
978 | next = next->next; | |
979 | next->next = new_slot; | |
980 | } | |
981 | return new_slot; | |
982 | } | |
983 | ||
984 | ||
985 | /** | |
986 | * slot_remove - Removes a node from the linked list of slots. | |
987 | * @old_slot: slot to remove | |
988 | * | |
26e6c66e | 989 | * Returns %0 if successful, !0 otherwise. |
1da177e4 LT |
990 | */ |
991 | static int slot_remove(struct pci_func * old_slot) | |
992 | { | |
993 | struct pci_func *next; | |
994 | ||
995 | if (old_slot == NULL) | |
996 | return 1; | |
997 | ||
998 | next = cpqhp_slot_list[old_slot->bus]; | |
999 | ||
1000 | if (next == NULL) { | |
1001 | return 1; | |
1002 | } | |
1003 | ||
1004 | if (next == old_slot) { | |
1005 | cpqhp_slot_list[old_slot->bus] = old_slot->next; | |
1006 | cpqhp_destroy_board_resources(old_slot); | |
1007 | kfree(old_slot); | |
1008 | return 0; | |
1009 | } | |
1010 | ||
1011 | while ((next->next != old_slot) && (next->next != NULL)) { | |
1012 | next = next->next; | |
1013 | } | |
1014 | ||
1015 | if (next->next == old_slot) { | |
1016 | next->next = old_slot->next; | |
1017 | cpqhp_destroy_board_resources(old_slot); | |
1018 | kfree(old_slot); | |
1019 | return 0; | |
1020 | } else | |
1021 | return 2; | |
1022 | } | |
1023 | ||
1024 | ||
1025 | /** | |
1026 | * bridge_slot_remove - Removes a node from the linked list of slots. | |
1027 | * @bridge: bridge to remove | |
1028 | * | |
26e6c66e | 1029 | * Returns %0 if successful, !0 otherwise. |
1da177e4 LT |
1030 | */ |
1031 | static int bridge_slot_remove(struct pci_func *bridge) | |
1032 | { | |
1033 | u8 subordinateBus, secondaryBus; | |
1034 | u8 tempBus; | |
1035 | struct pci_func *next; | |
1036 | ||
1037 | secondaryBus = (bridge->config_space[0x06] >> 8) & 0xFF; | |
1038 | subordinateBus = (bridge->config_space[0x06] >> 16) & 0xFF; | |
1039 | ||
1040 | for (tempBus = secondaryBus; tempBus <= subordinateBus; tempBus++) { | |
1041 | next = cpqhp_slot_list[tempBus]; | |
1042 | ||
1043 | while (!slot_remove(next)) { | |
1044 | next = cpqhp_slot_list[tempBus]; | |
1045 | } | |
1046 | } | |
1047 | ||
1048 | next = cpqhp_slot_list[bridge->bus]; | |
1049 | ||
1050 | if (next == NULL) | |
1051 | return 1; | |
1052 | ||
1053 | if (next == bridge) { | |
1054 | cpqhp_slot_list[bridge->bus] = bridge->next; | |
1055 | goto out; | |
1056 | } | |
1057 | ||
1058 | while ((next->next != bridge) && (next->next != NULL)) | |
1059 | next = next->next; | |
1060 | ||
1061 | if (next->next != bridge) | |
1062 | return 2; | |
1063 | next->next = bridge->next; | |
1064 | out: | |
1065 | kfree(bridge); | |
1066 | return 0; | |
1067 | } | |
1068 | ||
1069 | ||
1070 | /** | |
1071 | * cpqhp_slot_find - Looks for a node by bus, and device, multiple functions accessed | |
1072 | * @bus: bus to find | |
1073 | * @device: device to find | |
26e6c66e | 1074 | * @index: is %0 for first function found, %1 for the second... |
1da177e4 LT |
1075 | * |
1076 | * Returns pointer to the node if successful, %NULL otherwise. | |
1077 | */ | |
1078 | struct pci_func *cpqhp_slot_find(u8 bus, u8 device, u8 index) | |
1079 | { | |
1080 | int found = -1; | |
1081 | struct pci_func *func; | |
1082 | ||
1083 | func = cpqhp_slot_list[bus]; | |
1084 | ||
1085 | if ((func == NULL) || ((func->device == device) && (index == 0))) | |
1086 | return func; | |
1087 | ||
1088 | if (func->device == device) | |
1089 | found++; | |
1090 | ||
1091 | while (func->next != NULL) { | |
1092 | func = func->next; | |
1093 | ||
1094 | if (func->device == device) | |
1095 | found++; | |
1096 | ||
1097 | if (found == index) | |
1098 | return func; | |
1099 | } | |
1100 | ||
1101 | return NULL; | |
1102 | } | |
1103 | ||
1104 | ||
1105 | /* DJZ: I don't think is_bridge will work as is. | |
1106 | * FIXME */ | |
1107 | static int is_bridge(struct pci_func * func) | |
1108 | { | |
1109 | /* Check the header type */ | |
1110 | if (((func->config_space[0x03] >> 16) & 0xFF) == 0x01) | |
1111 | return 1; | |
1112 | else | |
1113 | return 0; | |
1114 | } | |
1115 | ||
1116 | ||
1117 | /** | |
26e6c66e | 1118 | * set_controller_speed - set the frequency and/or mode of a specific controller segment. |
1da177e4 LT |
1119 | * @ctrl: controller to change frequency/mode for. |
1120 | * @adapter_speed: the speed of the adapter we want to match. | |
1121 | * @hp_slot: the slot number where the adapter is installed. | |
1122 | * | |
26e6c66e | 1123 | * Returns %0 if we successfully change frequency and/or mode to match the |
1da177e4 | 1124 | * adapter speed. |
1da177e4 LT |
1125 | */ |
1126 | static u8 set_controller_speed(struct controller *ctrl, u8 adapter_speed, u8 hp_slot) | |
1127 | { | |
1128 | struct slot *slot; | |
1129 | u8 reg; | |
1130 | u8 slot_power = readb(ctrl->hpc_reg + SLOT_POWER); | |
1131 | u16 reg16; | |
1132 | u32 leds = readl(ctrl->hpc_reg + LED_CONTROL); | |
1133 | ||
1134 | if (ctrl->speed == adapter_speed) | |
1135 | return 0; | |
1136 | ||
1137 | /* We don't allow freq/mode changes if we find another adapter running | |
1138 | * in another slot on this controller */ | |
1139 | for(slot = ctrl->slot; slot; slot = slot->next) { | |
1140 | if (slot->device == (hp_slot + ctrl->slot_device_offset)) | |
1141 | continue; | |
05a34f51 | 1142 | if (!slot->hotplug_slot || !slot->hotplug_slot->info) |
1da177e4 LT |
1143 | continue; |
1144 | if (slot->hotplug_slot->info->adapter_status == 0) | |
1145 | continue; | |
1146 | /* If another adapter is running on the same segment but at a | |
1147 | * lower speed/mode, we allow the new adapter to function at | |
1148 | * this rate if supported */ | |
1149 | if (ctrl->speed < adapter_speed) | |
1150 | return 0; | |
1151 | ||
1152 | return 1; | |
1153 | } | |
1154 | ||
1155 | /* If the controller doesn't support freq/mode changes and the | |
1156 | * controller is running at a higher mode, we bail */ | |
1157 | if ((ctrl->speed > adapter_speed) && (!ctrl->pcix_speed_capability)) | |
1158 | return 1; | |
1159 | ||
1160 | /* But we allow the adapter to run at a lower rate if possible */ | |
1161 | if ((ctrl->speed < adapter_speed) && (!ctrl->pcix_speed_capability)) | |
1162 | return 0; | |
1163 | ||
1164 | /* We try to set the max speed supported by both the adapter and | |
1165 | * controller */ | |
1166 | if (ctrl->speed_capability < adapter_speed) { | |
1167 | if (ctrl->speed == ctrl->speed_capability) | |
1168 | return 0; | |
1169 | adapter_speed = ctrl->speed_capability; | |
1170 | } | |
1171 | ||
1172 | writel(0x0L, ctrl->hpc_reg + LED_CONTROL); | |
1173 | writeb(0x00, ctrl->hpc_reg + SLOT_ENABLE); | |
1174 | ||
1175 | set_SOGO(ctrl); | |
1176 | wait_for_ctrl_irq(ctrl); | |
1177 | ||
1178 | if (adapter_speed != PCI_SPEED_133MHz_PCIX) | |
1179 | reg = 0xF5; | |
1180 | else | |
1181 | reg = 0xF4; | |
1182 | pci_write_config_byte(ctrl->pci_dev, 0x41, reg); | |
1183 | ||
1184 | reg16 = readw(ctrl->hpc_reg + NEXT_CURR_FREQ); | |
1185 | reg16 &= ~0x000F; | |
1186 | switch(adapter_speed) { | |
1187 | case(PCI_SPEED_133MHz_PCIX): | |
1188 | reg = 0x75; | |
1189 | reg16 |= 0xB; | |
1190 | break; | |
1191 | case(PCI_SPEED_100MHz_PCIX): | |
1192 | reg = 0x74; | |
1193 | reg16 |= 0xA; | |
1194 | break; | |
1195 | case(PCI_SPEED_66MHz_PCIX): | |
1196 | reg = 0x73; | |
1197 | reg16 |= 0x9; | |
1198 | break; | |
1199 | case(PCI_SPEED_66MHz): | |
1200 | reg = 0x73; | |
1201 | reg16 |= 0x1; | |
1202 | break; | |
1203 | default: /* 33MHz PCI 2.2 */ | |
1204 | reg = 0x71; | |
1205 | break; | |
1206 | ||
1207 | } | |
1208 | reg16 |= 0xB << 12; | |
1209 | writew(reg16, ctrl->hpc_reg + NEXT_CURR_FREQ); | |
1210 | ||
1211 | mdelay(5); | |
1212 | ||
1213 | /* Reenable interrupts */ | |
1214 | writel(0, ctrl->hpc_reg + INT_MASK); | |
1215 | ||
1216 | pci_write_config_byte(ctrl->pci_dev, 0x41, reg); | |
1217 | ||
1218 | /* Restart state machine */ | |
1219 | reg = ~0xF; | |
1220 | pci_read_config_byte(ctrl->pci_dev, 0x43, ®); | |
1221 | pci_write_config_byte(ctrl->pci_dev, 0x43, reg); | |
1222 | ||
1223 | /* Only if mode change...*/ | |
1224 | if (((ctrl->speed == PCI_SPEED_66MHz) && (adapter_speed == PCI_SPEED_66MHz_PCIX)) || | |
1225 | ((ctrl->speed == PCI_SPEED_66MHz_PCIX) && (adapter_speed == PCI_SPEED_66MHz))) | |
1226 | set_SOGO(ctrl); | |
1227 | ||
1228 | wait_for_ctrl_irq(ctrl); | |
1229 | mdelay(1100); | |
1230 | ||
1231 | /* Restore LED/Slot state */ | |
1232 | writel(leds, ctrl->hpc_reg + LED_CONTROL); | |
1233 | writeb(slot_power, ctrl->hpc_reg + SLOT_ENABLE); | |
1234 | ||
1235 | set_SOGO(ctrl); | |
1236 | wait_for_ctrl_irq(ctrl); | |
1237 | ||
1238 | ctrl->speed = adapter_speed; | |
1239 | slot = cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); | |
1240 | ||
1241 | info("Successfully changed frequency/mode for adapter in slot %d\n", | |
1242 | slot->number); | |
1243 | return 0; | |
1244 | } | |
1245 | ||
1246 | /* the following routines constitute the bulk of the | |
1247 | hotplug controller logic | |
1248 | */ | |
1249 | ||
1250 | ||
1251 | /** | |
1252 | * board_replaced - Called after a board has been replaced in the system. | |
26e6c66e RD |
1253 | * @func: PCI device/function information |
1254 | * @ctrl: hotplug controller | |
1da177e4 | 1255 | * |
26e6c66e RD |
1256 | * This is only used if we don't have resources for hot add. |
1257 | * Turns power on for the board. | |
1258 | * Checks to see if board is the same. | |
1259 | * If board is same, reconfigures it. | |
1da177e4 | 1260 | * If board isn't same, turns it back off. |
1da177e4 LT |
1261 | */ |
1262 | static u32 board_replaced(struct pci_func *func, struct controller *ctrl) | |
1263 | { | |
1264 | u8 hp_slot; | |
1265 | u8 temp_byte; | |
1266 | u8 adapter_speed; | |
1da177e4 | 1267 | u32 rc = 0; |
1da177e4 LT |
1268 | |
1269 | hp_slot = func->device - ctrl->slot_device_offset; | |
1270 | ||
1271 | if (readl(ctrl->hpc_reg + INT_INPUT_CLEAR) & (0x01L << hp_slot)) { | |
1272 | /********************************** | |
1273 | * The switch is open. | |
1274 | **********************************/ | |
1275 | rc = INTERLOCK_OPEN; | |
1276 | } else if (is_slot_enabled (ctrl, hp_slot)) { | |
1277 | /********************************** | |
1278 | * The board is already on | |
1279 | **********************************/ | |
1280 | rc = CARD_FUNCTIONING; | |
1281 | } else { | |
6aa4cdd0 | 1282 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1283 | |
1284 | /* turn on board without attaching to the bus */ | |
1285 | enable_slot_power (ctrl, hp_slot); | |
1286 | ||
1287 | set_SOGO(ctrl); | |
1288 | ||
1289 | /* Wait for SOBS to be unset */ | |
1290 | wait_for_ctrl_irq (ctrl); | |
1291 | ||
1292 | /* Change bits in slot power register to force another shift out | |
1293 | * NOTE: this is to work around the timer bug */ | |
1294 | temp_byte = readb(ctrl->hpc_reg + SLOT_POWER); | |
1295 | writeb(0x00, ctrl->hpc_reg + SLOT_POWER); | |
1296 | writeb(temp_byte, ctrl->hpc_reg + SLOT_POWER); | |
1297 | ||
1298 | set_SOGO(ctrl); | |
1299 | ||
1300 | /* Wait for SOBS to be unset */ | |
1301 | wait_for_ctrl_irq (ctrl); | |
1302 | ||
1303 | adapter_speed = get_adapter_speed(ctrl, hp_slot); | |
1304 | if (ctrl->speed != adapter_speed) | |
1305 | if (set_controller_speed(ctrl, adapter_speed, hp_slot)) | |
1306 | rc = WRONG_BUS_FREQUENCY; | |
1307 | ||
1308 | /* turn off board without attaching to the bus */ | |
1309 | disable_slot_power (ctrl, hp_slot); | |
1310 | ||
1311 | set_SOGO(ctrl); | |
1312 | ||
1313 | /* Wait for SOBS to be unset */ | |
1314 | wait_for_ctrl_irq (ctrl); | |
1315 | ||
6aa4cdd0 | 1316 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
1317 | |
1318 | if (rc) | |
1319 | return rc; | |
1320 | ||
6aa4cdd0 | 1321 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1322 | |
1323 | slot_enable (ctrl, hp_slot); | |
1324 | green_LED_blink (ctrl, hp_slot); | |
1325 | ||
1326 | amber_LED_off (ctrl, hp_slot); | |
1327 | ||
1328 | set_SOGO(ctrl); | |
1329 | ||
1330 | /* Wait for SOBS to be unset */ | |
1331 | wait_for_ctrl_irq (ctrl); | |
1332 | ||
6aa4cdd0 | 1333 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
1334 | |
1335 | /* Wait for ~1 second because of hot plug spec */ | |
1336 | long_delay(1*HZ); | |
1337 | ||
1338 | /* Check for a power fault */ | |
1339 | if (func->status == 0xFF) { | |
1340 | /* power fault occurred, but it was benign */ | |
1341 | rc = POWER_FAILURE; | |
1342 | func->status = 0; | |
1343 | } else | |
1344 | rc = cpqhp_valid_replace(ctrl, func); | |
1345 | ||
1346 | if (!rc) { | |
1347 | /* It must be the same board */ | |
1348 | ||
1349 | rc = cpqhp_configure_board(ctrl, func); | |
1350 | ||
1305e918 AB |
1351 | /* If configuration fails, turn it off |
1352 | * Get slot won't work for devices behind | |
1353 | * bridges, but in this case it will always be | |
1354 | * called for the "base" bus/dev/func of an | |
1355 | * adapter. */ | |
1da177e4 | 1356 | |
6aa4cdd0 | 1357 | mutex_lock(&ctrl->crit_sect); |
1da177e4 | 1358 | |
1305e918 AB |
1359 | amber_LED_on (ctrl, hp_slot); |
1360 | green_LED_off (ctrl, hp_slot); | |
1361 | slot_disable (ctrl, hp_slot); | |
1da177e4 LT |
1362 | |
1363 | set_SOGO(ctrl); | |
1364 | ||
1365 | /* Wait for SOBS to be unset */ | |
1366 | wait_for_ctrl_irq (ctrl); | |
1367 | ||
6aa4cdd0 | 1368 | mutex_unlock(&ctrl->crit_sect); |
1305e918 AB |
1369 | |
1370 | if (rc) | |
1371 | return rc; | |
1372 | else | |
1373 | return 1; | |
1374 | ||
1da177e4 LT |
1375 | } else { |
1376 | /* Something is wrong | |
1377 | ||
1378 | * Get slot won't work for devices behind bridges, but | |
1379 | * in this case it will always be called for the "base" | |
1380 | * bus/dev/func of an adapter. */ | |
1381 | ||
6aa4cdd0 | 1382 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1383 | |
1384 | amber_LED_on (ctrl, hp_slot); | |
1385 | green_LED_off (ctrl, hp_slot); | |
1386 | slot_disable (ctrl, hp_slot); | |
1387 | ||
1388 | set_SOGO(ctrl); | |
1389 | ||
1390 | /* Wait for SOBS to be unset */ | |
1391 | wait_for_ctrl_irq (ctrl); | |
1392 | ||
6aa4cdd0 | 1393 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
1394 | } |
1395 | ||
1396 | } | |
1397 | return rc; | |
1398 | ||
1399 | } | |
1400 | ||
1401 | ||
1402 | /** | |
1403 | * board_added - Called after a board has been added to the system. | |
26e6c66e RD |
1404 | * @func: PCI device/function info |
1405 | * @ctrl: hotplug controller | |
1da177e4 | 1406 | * |
26e6c66e RD |
1407 | * Turns power on for the board. |
1408 | * Configures board. | |
1da177e4 LT |
1409 | */ |
1410 | static u32 board_added(struct pci_func *func, struct controller *ctrl) | |
1411 | { | |
1412 | u8 hp_slot; | |
1413 | u8 temp_byte; | |
1414 | u8 adapter_speed; | |
1415 | int index; | |
1416 | u32 temp_register = 0xFFFFFFFF; | |
1417 | u32 rc = 0; | |
1418 | struct pci_func *new_slot = NULL; | |
1419 | struct slot *p_slot; | |
1420 | struct resource_lists res_lists; | |
1421 | ||
1422 | hp_slot = func->device - ctrl->slot_device_offset; | |
1423 | dbg("%s: func->device, slot_offset, hp_slot = %d, %d ,%d\n", | |
66bef8c0 | 1424 | __func__, func->device, ctrl->slot_device_offset, hp_slot); |
1da177e4 | 1425 | |
6aa4cdd0 | 1426 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1427 | |
1428 | /* turn on board without attaching to the bus */ | |
1429 | enable_slot_power(ctrl, hp_slot); | |
1430 | ||
1431 | set_SOGO(ctrl); | |
1432 | ||
1433 | /* Wait for SOBS to be unset */ | |
1434 | wait_for_ctrl_irq (ctrl); | |
1435 | ||
1436 | /* Change bits in slot power register to force another shift out | |
1437 | * NOTE: this is to work around the timer bug */ | |
1438 | temp_byte = readb(ctrl->hpc_reg + SLOT_POWER); | |
1439 | writeb(0x00, ctrl->hpc_reg + SLOT_POWER); | |
1440 | writeb(temp_byte, ctrl->hpc_reg + SLOT_POWER); | |
1441 | ||
1442 | set_SOGO(ctrl); | |
1443 | ||
1444 | /* Wait for SOBS to be unset */ | |
1445 | wait_for_ctrl_irq (ctrl); | |
1446 | ||
1447 | adapter_speed = get_adapter_speed(ctrl, hp_slot); | |
1448 | if (ctrl->speed != adapter_speed) | |
1449 | if (set_controller_speed(ctrl, adapter_speed, hp_slot)) | |
1450 | rc = WRONG_BUS_FREQUENCY; | |
1451 | ||
1452 | /* turn off board without attaching to the bus */ | |
1453 | disable_slot_power (ctrl, hp_slot); | |
1454 | ||
1455 | set_SOGO(ctrl); | |
1456 | ||
1457 | /* Wait for SOBS to be unset */ | |
1458 | wait_for_ctrl_irq(ctrl); | |
1459 | ||
6aa4cdd0 | 1460 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
1461 | |
1462 | if (rc) | |
1463 | return rc; | |
1464 | ||
1465 | p_slot = cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); | |
1466 | ||
1467 | /* turn on board and blink green LED */ | |
1468 | ||
66bef8c0 | 1469 | dbg("%s: before down\n", __func__); |
6aa4cdd0 | 1470 | mutex_lock(&ctrl->crit_sect); |
66bef8c0 | 1471 | dbg("%s: after down\n", __func__); |
1da177e4 | 1472 | |
66bef8c0 | 1473 | dbg("%s: before slot_enable\n", __func__); |
1da177e4 LT |
1474 | slot_enable (ctrl, hp_slot); |
1475 | ||
66bef8c0 | 1476 | dbg("%s: before green_LED_blink\n", __func__); |
1da177e4 LT |
1477 | green_LED_blink (ctrl, hp_slot); |
1478 | ||
66bef8c0 | 1479 | dbg("%s: before amber_LED_blink\n", __func__); |
1da177e4 LT |
1480 | amber_LED_off (ctrl, hp_slot); |
1481 | ||
66bef8c0 | 1482 | dbg("%s: before set_SOGO\n", __func__); |
1da177e4 LT |
1483 | set_SOGO(ctrl); |
1484 | ||
1485 | /* Wait for SOBS to be unset */ | |
66bef8c0 | 1486 | dbg("%s: before wait_for_ctrl_irq\n", __func__); |
1da177e4 | 1487 | wait_for_ctrl_irq (ctrl); |
66bef8c0 | 1488 | dbg("%s: after wait_for_ctrl_irq\n", __func__); |
1da177e4 | 1489 | |
66bef8c0 | 1490 | dbg("%s: before up\n", __func__); |
6aa4cdd0 | 1491 | mutex_unlock(&ctrl->crit_sect); |
66bef8c0 | 1492 | dbg("%s: after up\n", __func__); |
1da177e4 LT |
1493 | |
1494 | /* Wait for ~1 second because of hot plug spec */ | |
66bef8c0 | 1495 | dbg("%s: before long_delay\n", __func__); |
1da177e4 | 1496 | long_delay(1*HZ); |
66bef8c0 | 1497 | dbg("%s: after long_delay\n", __func__); |
1da177e4 | 1498 | |
66bef8c0 | 1499 | dbg("%s: func status = %x\n", __func__, func->status); |
1da177e4 LT |
1500 | /* Check for a power fault */ |
1501 | if (func->status == 0xFF) { | |
1502 | /* power fault occurred, but it was benign */ | |
1503 | temp_register = 0xFFFFFFFF; | |
66bef8c0 | 1504 | dbg("%s: temp register set to %x by power fault\n", __func__, temp_register); |
1da177e4 LT |
1505 | rc = POWER_FAILURE; |
1506 | func->status = 0; | |
1507 | } else { | |
1508 | /* Get vendor/device ID u32 */ | |
1509 | ctrl->pci_bus->number = func->bus; | |
1510 | rc = pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(func->device, func->function), PCI_VENDOR_ID, &temp_register); | |
66bef8c0 HH |
1511 | dbg("%s: pci_read_config_dword returns %d\n", __func__, rc); |
1512 | dbg("%s: temp_register is %x\n", __func__, temp_register); | |
1da177e4 LT |
1513 | |
1514 | if (rc != 0) { | |
1515 | /* Something's wrong here */ | |
1516 | temp_register = 0xFFFFFFFF; | |
66bef8c0 | 1517 | dbg("%s: temp register set to %x by error\n", __func__, temp_register); |
1da177e4 LT |
1518 | } |
1519 | /* Preset return code. It will be changed later if things go okay. */ | |
1520 | rc = NO_ADAPTER_PRESENT; | |
1521 | } | |
1522 | ||
1523 | /* All F's is an empty slot or an invalid board */ | |
1524 | if (temp_register != 0xFFFFFFFF) { /* Check for a board in the slot */ | |
1525 | res_lists.io_head = ctrl->io_head; | |
1526 | res_lists.mem_head = ctrl->mem_head; | |
1527 | res_lists.p_mem_head = ctrl->p_mem_head; | |
1528 | res_lists.bus_head = ctrl->bus_head; | |
1529 | res_lists.irqs = NULL; | |
1530 | ||
1531 | rc = configure_new_device(ctrl, func, 0, &res_lists); | |
1532 | ||
66bef8c0 | 1533 | dbg("%s: back from configure_new_device\n", __func__); |
1da177e4 LT |
1534 | ctrl->io_head = res_lists.io_head; |
1535 | ctrl->mem_head = res_lists.mem_head; | |
1536 | ctrl->p_mem_head = res_lists.p_mem_head; | |
1537 | ctrl->bus_head = res_lists.bus_head; | |
1538 | ||
1539 | cpqhp_resource_sort_and_combine(&(ctrl->mem_head)); | |
1540 | cpqhp_resource_sort_and_combine(&(ctrl->p_mem_head)); | |
1541 | cpqhp_resource_sort_and_combine(&(ctrl->io_head)); | |
1542 | cpqhp_resource_sort_and_combine(&(ctrl->bus_head)); | |
1543 | ||
1544 | if (rc) { | |
6aa4cdd0 | 1545 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1546 | |
1547 | amber_LED_on (ctrl, hp_slot); | |
1548 | green_LED_off (ctrl, hp_slot); | |
1549 | slot_disable (ctrl, hp_slot); | |
1550 | ||
1551 | set_SOGO(ctrl); | |
1552 | ||
1553 | /* Wait for SOBS to be unset */ | |
1554 | wait_for_ctrl_irq (ctrl); | |
1555 | ||
6aa4cdd0 | 1556 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
1557 | return rc; |
1558 | } else { | |
1559 | cpqhp_save_slot_config(ctrl, func); | |
1560 | } | |
1561 | ||
1562 | ||
1563 | func->status = 0; | |
1564 | func->switch_save = 0x10; | |
1565 | func->is_a_board = 0x01; | |
1566 | ||
1567 | /* next, we will instantiate the linux pci_dev structures (with | |
1568 | * appropriate driver notification, if already present) */ | |
66bef8c0 | 1569 | dbg("%s: configure linux pci_dev structure\n", __func__); |
1da177e4 LT |
1570 | index = 0; |
1571 | do { | |
1572 | new_slot = cpqhp_slot_find(ctrl->bus, func->device, index++); | |
1573 | if (new_slot && !new_slot->pci_dev) { | |
1574 | cpqhp_configure_device(ctrl, new_slot); | |
1575 | } | |
1576 | } while (new_slot); | |
1577 | ||
6aa4cdd0 | 1578 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1579 | |
1580 | green_LED_on (ctrl, hp_slot); | |
1581 | ||
1582 | set_SOGO(ctrl); | |
1583 | ||
1584 | /* Wait for SOBS to be unset */ | |
1585 | wait_for_ctrl_irq (ctrl); | |
1586 | ||
6aa4cdd0 | 1587 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 | 1588 | } else { |
6aa4cdd0 | 1589 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1590 | |
1591 | amber_LED_on (ctrl, hp_slot); | |
1592 | green_LED_off (ctrl, hp_slot); | |
1593 | slot_disable (ctrl, hp_slot); | |
1594 | ||
1595 | set_SOGO(ctrl); | |
1596 | ||
1597 | /* Wait for SOBS to be unset */ | |
1598 | wait_for_ctrl_irq (ctrl); | |
1599 | ||
6aa4cdd0 | 1600 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
1601 | |
1602 | return rc; | |
1603 | } | |
1604 | return 0; | |
1605 | } | |
1606 | ||
1607 | ||
1608 | /** | |
26e6c66e RD |
1609 | * remove_board - Turns off slot and LEDs |
1610 | * @func: PCI device/function info | |
1611 | * @replace_flag: whether replacing or adding a new device | |
1612 | * @ctrl: target controller | |
1da177e4 LT |
1613 | */ |
1614 | static u32 remove_board(struct pci_func * func, u32 replace_flag, struct controller * ctrl) | |
1615 | { | |
1616 | int index; | |
1617 | u8 skip = 0; | |
1618 | u8 device; | |
1619 | u8 hp_slot; | |
1620 | u8 temp_byte; | |
1621 | u32 rc; | |
1622 | struct resource_lists res_lists; | |
1623 | struct pci_func *temp_func; | |
1624 | ||
1625 | if (cpqhp_unconfigure_device(func)) | |
1626 | return 1; | |
1627 | ||
1628 | device = func->device; | |
1629 | ||
1630 | hp_slot = func->device - ctrl->slot_device_offset; | |
66bef8c0 | 1631 | dbg("In %s, hp_slot = %d\n", __func__, hp_slot); |
1da177e4 LT |
1632 | |
1633 | /* When we get here, it is safe to change base address registers. | |
1634 | * We will attempt to save the base address register lengths */ | |
1635 | if (replace_flag || !ctrl->add_support) | |
1636 | rc = cpqhp_save_base_addr_length(ctrl, func); | |
1637 | else if (!func->bus_head && !func->mem_head && | |
1638 | !func->p_mem_head && !func->io_head) { | |
1639 | /* Here we check to see if we've saved any of the board's | |
1640 | * resources already. If so, we'll skip the attempt to | |
1641 | * determine what's being used. */ | |
1642 | index = 0; | |
1643 | temp_func = cpqhp_slot_find(func->bus, func->device, index++); | |
1644 | while (temp_func) { | |
1645 | if (temp_func->bus_head || temp_func->mem_head | |
1646 | || temp_func->p_mem_head || temp_func->io_head) { | |
1647 | skip = 1; | |
1648 | break; | |
1649 | } | |
1650 | temp_func = cpqhp_slot_find(temp_func->bus, temp_func->device, index++); | |
1651 | } | |
1652 | ||
1653 | if (!skip) | |
1654 | rc = cpqhp_save_used_resources(ctrl, func); | |
1655 | } | |
1656 | /* Change status to shutdown */ | |
1657 | if (func->is_a_board) | |
1658 | func->status = 0x01; | |
1659 | func->configured = 0; | |
1660 | ||
6aa4cdd0 | 1661 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1662 | |
1663 | green_LED_off (ctrl, hp_slot); | |
1664 | slot_disable (ctrl, hp_slot); | |
1665 | ||
1666 | set_SOGO(ctrl); | |
1667 | ||
1668 | /* turn off SERR for slot */ | |
1669 | temp_byte = readb(ctrl->hpc_reg + SLOT_SERR); | |
1670 | temp_byte &= ~(0x01 << hp_slot); | |
1671 | writeb(temp_byte, ctrl->hpc_reg + SLOT_SERR); | |
1672 | ||
1673 | /* Wait for SOBS to be unset */ | |
1674 | wait_for_ctrl_irq (ctrl); | |
1675 | ||
6aa4cdd0 | 1676 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
1677 | |
1678 | if (!replace_flag && ctrl->add_support) { | |
1679 | while (func) { | |
1680 | res_lists.io_head = ctrl->io_head; | |
1681 | res_lists.mem_head = ctrl->mem_head; | |
1682 | res_lists.p_mem_head = ctrl->p_mem_head; | |
1683 | res_lists.bus_head = ctrl->bus_head; | |
1684 | ||
1685 | cpqhp_return_board_resources(func, &res_lists); | |
1686 | ||
1687 | ctrl->io_head = res_lists.io_head; | |
1688 | ctrl->mem_head = res_lists.mem_head; | |
1689 | ctrl->p_mem_head = res_lists.p_mem_head; | |
1690 | ctrl->bus_head = res_lists.bus_head; | |
1691 | ||
1692 | cpqhp_resource_sort_and_combine(&(ctrl->mem_head)); | |
1693 | cpqhp_resource_sort_and_combine(&(ctrl->p_mem_head)); | |
1694 | cpqhp_resource_sort_and_combine(&(ctrl->io_head)); | |
1695 | cpqhp_resource_sort_and_combine(&(ctrl->bus_head)); | |
1696 | ||
1697 | if (is_bridge(func)) { | |
1698 | bridge_slot_remove(func); | |
1699 | } else | |
1700 | slot_remove(func); | |
1701 | ||
1702 | func = cpqhp_slot_find(ctrl->bus, device, 0); | |
1703 | } | |
1704 | ||
1705 | /* Setup slot structure with entry for empty slot */ | |
1706 | func = cpqhp_slot_create(ctrl->bus); | |
1707 | ||
1708 | if (func == NULL) | |
1709 | return 1; | |
1710 | ||
1711 | func->bus = ctrl->bus; | |
1712 | func->device = device; | |
1713 | func->function = 0; | |
1714 | func->configured = 0; | |
1715 | func->switch_save = 0x10; | |
1716 | func->is_a_board = 0; | |
1717 | func->p_task_event = NULL; | |
1718 | } | |
1719 | ||
1720 | return 0; | |
1721 | } | |
1722 | ||
1723 | static void pushbutton_helper_thread(unsigned long data) | |
1724 | { | |
1725 | pushbutton_pending = data; | |
fa007d8b | 1726 | wake_up_process(cpqhp_event_thread); |
1da177e4 LT |
1727 | } |
1728 | ||
1729 | ||
1730 | /* this is the main worker thread */ | |
1731 | static int event_thread(void* data) | |
1732 | { | |
1733 | struct controller *ctrl; | |
60ac8f20 | 1734 | |
1da177e4 LT |
1735 | while (1) { |
1736 | dbg("!!!!event_thread sleeping\n"); | |
fa007d8b CH |
1737 | set_current_state(TASK_INTERRUPTIBLE); |
1738 | schedule(); | |
1739 | ||
1740 | if (kthread_should_stop()) | |
1741 | break; | |
1da177e4 LT |
1742 | /* Do stuff here */ |
1743 | if (pushbutton_pending) | |
1744 | cpqhp_pushbutton_thread(pushbutton_pending); | |
1745 | else | |
1746 | for (ctrl = cpqhp_ctrl_list; ctrl; ctrl=ctrl->next) | |
1747 | interrupt_event_handler(ctrl); | |
1748 | } | |
1749 | dbg("event_thread signals exit\n"); | |
1da177e4 LT |
1750 | return 0; |
1751 | } | |
1752 | ||
1da177e4 LT |
1753 | int cpqhp_event_start_thread(void) |
1754 | { | |
fa007d8b CH |
1755 | cpqhp_event_thread = kthread_run(event_thread, NULL, "phpd_event"); |
1756 | if (IS_ERR(cpqhp_event_thread)) { | |
1da177e4 | 1757 | err ("Can't start up our event thread\n"); |
fa007d8b | 1758 | return PTR_ERR(cpqhp_event_thread); |
1da177e4 | 1759 | } |
fa007d8b | 1760 | |
1da177e4 LT |
1761 | return 0; |
1762 | } | |
1763 | ||
1764 | ||
1765 | void cpqhp_event_stop_thread(void) | |
1766 | { | |
fa007d8b | 1767 | kthread_stop(cpqhp_event_thread); |
1da177e4 LT |
1768 | } |
1769 | ||
1770 | ||
1771 | static int update_slot_info(struct controller *ctrl, struct slot *slot) | |
1772 | { | |
1773 | struct hotplug_slot_info *info; | |
1774 | int result; | |
1775 | ||
1776 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
1777 | if (!info) | |
1778 | return -ENOMEM; | |
1779 | ||
1780 | info->power_status = get_slot_enabled(ctrl, slot); | |
1781 | info->attention_status = cpq_get_attention_status(ctrl, slot); | |
1782 | info->latch_status = cpq_get_latch_status(ctrl, slot); | |
1783 | info->adapter_status = get_presence_status(ctrl, slot); | |
1784 | result = pci_hp_change_slot_info(slot->hotplug_slot, info); | |
1785 | kfree (info); | |
1786 | return result; | |
1787 | } | |
1788 | ||
1789 | static void interrupt_event_handler(struct controller *ctrl) | |
1790 | { | |
1791 | int loop = 0; | |
1792 | int change = 1; | |
1793 | struct pci_func *func; | |
1794 | u8 hp_slot; | |
1795 | struct slot *p_slot; | |
1796 | ||
1797 | while (change) { | |
1798 | change = 0; | |
1799 | ||
1800 | for (loop = 0; loop < 10; loop++) { | |
1801 | /* dbg("loop %d\n", loop); */ | |
1802 | if (ctrl->event_queue[loop].event_type != 0) { | |
1803 | hp_slot = ctrl->event_queue[loop].hp_slot; | |
1804 | ||
1805 | func = cpqhp_slot_find(ctrl->bus, (hp_slot + ctrl->slot_device_offset), 0); | |
1806 | if (!func) | |
1807 | return; | |
1808 | ||
1809 | p_slot = cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); | |
1810 | if (!p_slot) | |
1811 | return; | |
1812 | ||
1813 | dbg("hp_slot %d, func %p, p_slot %p\n", | |
1814 | hp_slot, func, p_slot); | |
1815 | ||
1816 | if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) { | |
1817 | dbg("button pressed\n"); | |
1818 | } else if (ctrl->event_queue[loop].event_type == | |
1819 | INT_BUTTON_CANCEL) { | |
1820 | dbg("button cancel\n"); | |
1821 | del_timer(&p_slot->task_event); | |
1822 | ||
6aa4cdd0 | 1823 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1824 | |
1825 | if (p_slot->state == BLINKINGOFF_STATE) { | |
1826 | /* slot is on */ | |
1827 | dbg("turn on green LED\n"); | |
1828 | green_LED_on (ctrl, hp_slot); | |
1829 | } else if (p_slot->state == BLINKINGON_STATE) { | |
1830 | /* slot is off */ | |
1831 | dbg("turn off green LED\n"); | |
1832 | green_LED_off (ctrl, hp_slot); | |
1833 | } | |
1834 | ||
1835 | info(msg_button_cancel, p_slot->number); | |
1836 | ||
1837 | p_slot->state = STATIC_STATE; | |
1838 | ||
1839 | amber_LED_off (ctrl, hp_slot); | |
1840 | ||
1841 | set_SOGO(ctrl); | |
1842 | ||
1843 | /* Wait for SOBS to be unset */ | |
1844 | wait_for_ctrl_irq (ctrl); | |
1845 | ||
6aa4cdd0 | 1846 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
1847 | } |
1848 | /*** button Released (No action on press...) */ | |
1849 | else if (ctrl->event_queue[loop].event_type == INT_BUTTON_RELEASE) { | |
1850 | dbg("button release\n"); | |
1851 | ||
1852 | if (is_slot_enabled (ctrl, hp_slot)) { | |
1853 | dbg("slot is on\n"); | |
1854 | p_slot->state = BLINKINGOFF_STATE; | |
1855 | info(msg_button_off, p_slot->number); | |
1856 | } else { | |
1857 | dbg("slot is off\n"); | |
1858 | p_slot->state = BLINKINGON_STATE; | |
1859 | info(msg_button_on, p_slot->number); | |
1860 | } | |
6aa4cdd0 | 1861 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1862 | |
1863 | dbg("blink green LED and turn off amber\n"); | |
1864 | ||
1865 | amber_LED_off (ctrl, hp_slot); | |
1866 | green_LED_blink (ctrl, hp_slot); | |
1867 | ||
1868 | set_SOGO(ctrl); | |
1869 | ||
1870 | /* Wait for SOBS to be unset */ | |
1871 | wait_for_ctrl_irq (ctrl); | |
1872 | ||
6aa4cdd0 | 1873 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
1874 | init_timer(&p_slot->task_event); |
1875 | p_slot->hp_slot = hp_slot; | |
1876 | p_slot->ctrl = ctrl; | |
1877 | /* p_slot->physical_slot = physical_slot; */ | |
1878 | p_slot->task_event.expires = jiffies + 5 * HZ; /* 5 second delay */ | |
1879 | p_slot->task_event.function = pushbutton_helper_thread; | |
1880 | p_slot->task_event.data = (u32) p_slot; | |
1881 | ||
1882 | dbg("add_timer p_slot = %p\n", p_slot); | |
1883 | add_timer(&p_slot->task_event); | |
1884 | } | |
1885 | /***********POWER FAULT */ | |
1886 | else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) { | |
1887 | dbg("power fault\n"); | |
1888 | } else { | |
1889 | /* refresh notification */ | |
1890 | if (p_slot) | |
1891 | update_slot_info(ctrl, p_slot); | |
1892 | } | |
1893 | ||
1894 | ctrl->event_queue[loop].event_type = 0; | |
1895 | ||
1896 | change = 1; | |
1897 | } | |
1898 | } /* End of FOR loop */ | |
1899 | } | |
1900 | ||
1901 | return; | |
1902 | } | |
1903 | ||
1904 | ||
1905 | /** | |
26e6c66e RD |
1906 | * cpqhp_pushbutton_thread - handle pushbutton events |
1907 | * @slot: target slot (struct) | |
1da177e4 | 1908 | * |
26e6c66e | 1909 | * Scheduled procedure to handle blocking stuff for the pushbuttons. |
1da177e4 | 1910 | * Handles all pending events and exits. |
1da177e4 LT |
1911 | */ |
1912 | void cpqhp_pushbutton_thread(unsigned long slot) | |
1913 | { | |
1914 | u8 hp_slot; | |
1915 | u8 device; | |
1916 | struct pci_func *func; | |
1917 | struct slot *p_slot = (struct slot *) slot; | |
1918 | struct controller *ctrl = (struct controller *) p_slot->ctrl; | |
1919 | ||
1920 | pushbutton_pending = 0; | |
1921 | hp_slot = p_slot->hp_slot; | |
1922 | ||
1923 | device = p_slot->device; | |
1924 | ||
1925 | if (is_slot_enabled(ctrl, hp_slot)) { | |
1926 | p_slot->state = POWEROFF_STATE; | |
1927 | /* power Down board */ | |
1928 | func = cpqhp_slot_find(p_slot->bus, p_slot->device, 0); | |
1929 | dbg("In power_down_board, func = %p, ctrl = %p\n", func, ctrl); | |
1930 | if (!func) { | |
66bef8c0 | 1931 | dbg("Error! func NULL in %s\n", __func__); |
1da177e4 LT |
1932 | return ; |
1933 | } | |
1934 | ||
00395410 AB |
1935 | if (cpqhp_process_SS(ctrl, func) != 0) { |
1936 | amber_LED_on(ctrl, hp_slot); | |
1937 | green_LED_on(ctrl, hp_slot); | |
1da177e4 | 1938 | |
00395410 AB |
1939 | set_SOGO(ctrl); |
1940 | ||
1941 | /* Wait for SOBS to be unset */ | |
1942 | wait_for_ctrl_irq(ctrl); | |
1da177e4 LT |
1943 | } |
1944 | ||
1945 | p_slot->state = STATIC_STATE; | |
1946 | } else { | |
1947 | p_slot->state = POWERON_STATE; | |
1948 | /* slot is off */ | |
1949 | ||
1950 | func = cpqhp_slot_find(p_slot->bus, p_slot->device, 0); | |
1951 | dbg("In add_board, func = %p, ctrl = %p\n", func, ctrl); | |
1952 | if (!func) { | |
66bef8c0 | 1953 | dbg("Error! func NULL in %s\n", __func__); |
1da177e4 LT |
1954 | return ; |
1955 | } | |
1956 | ||
1957 | if (func != NULL && ctrl != NULL) { | |
1958 | if (cpqhp_process_SI(ctrl, func) != 0) { | |
1959 | amber_LED_on(ctrl, hp_slot); | |
1960 | green_LED_off(ctrl, hp_slot); | |
1961 | ||
1962 | set_SOGO(ctrl); | |
1963 | ||
1964 | /* Wait for SOBS to be unset */ | |
1965 | wait_for_ctrl_irq (ctrl); | |
1966 | } | |
1967 | } | |
1968 | ||
1969 | p_slot->state = STATIC_STATE; | |
1970 | } | |
1971 | ||
1972 | return; | |
1973 | } | |
1974 | ||
1975 | ||
1976 | int cpqhp_process_SI(struct controller *ctrl, struct pci_func *func) | |
1977 | { | |
1978 | u8 device, hp_slot; | |
1979 | u16 temp_word; | |
1980 | u32 tempdword; | |
1981 | int rc; | |
1982 | struct slot* p_slot; | |
1983 | int physical_slot = 0; | |
1984 | ||
1985 | tempdword = 0; | |
1986 | ||
1987 | device = func->device; | |
1988 | hp_slot = device - ctrl->slot_device_offset; | |
1989 | p_slot = cpqhp_find_slot(ctrl, device); | |
1990 | if (p_slot) | |
1991 | physical_slot = p_slot->number; | |
1992 | ||
1993 | /* Check to see if the interlock is closed */ | |
1994 | tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR); | |
1995 | ||
1996 | if (tempdword & (0x01 << hp_slot)) { | |
1997 | return 1; | |
1998 | } | |
1999 | ||
2000 | if (func->is_a_board) { | |
2001 | rc = board_replaced(func, ctrl); | |
2002 | } else { | |
2003 | /* add board */ | |
2004 | slot_remove(func); | |
2005 | ||
2006 | func = cpqhp_slot_create(ctrl->bus); | |
2007 | if (func == NULL) | |
2008 | return 1; | |
2009 | ||
2010 | func->bus = ctrl->bus; | |
2011 | func->device = device; | |
2012 | func->function = 0; | |
2013 | func->configured = 0; | |
2014 | func->is_a_board = 1; | |
2015 | ||
2016 | /* We have to save the presence info for these slots */ | |
2017 | temp_word = ctrl->ctrl_int_comp >> 16; | |
2018 | func->presence_save = (temp_word >> hp_slot) & 0x01; | |
2019 | func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02; | |
2020 | ||
2021 | if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) { | |
2022 | func->switch_save = 0; | |
2023 | } else { | |
2024 | func->switch_save = 0x10; | |
2025 | } | |
2026 | ||
2027 | rc = board_added(func, ctrl); | |
2028 | if (rc) { | |
2029 | if (is_bridge(func)) { | |
2030 | bridge_slot_remove(func); | |
2031 | } else | |
2032 | slot_remove(func); | |
2033 | ||
2034 | /* Setup slot structure with entry for empty slot */ | |
2035 | func = cpqhp_slot_create(ctrl->bus); | |
2036 | ||
2037 | if (func == NULL) | |
2038 | return 1; | |
2039 | ||
2040 | func->bus = ctrl->bus; | |
2041 | func->device = device; | |
2042 | func->function = 0; | |
2043 | func->configured = 0; | |
2044 | func->is_a_board = 0; | |
2045 | ||
2046 | /* We have to save the presence info for these slots */ | |
2047 | temp_word = ctrl->ctrl_int_comp >> 16; | |
2048 | func->presence_save = (temp_word >> hp_slot) & 0x01; | |
2049 | func->presence_save |= | |
2050 | (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 | } | |
2059 | ||
2060 | if (rc) { | |
66bef8c0 | 2061 | dbg("%s: rc = %d\n", __func__, rc); |
1da177e4 LT |
2062 | } |
2063 | ||
2064 | if (p_slot) | |
2065 | update_slot_info(ctrl, p_slot); | |
2066 | ||
2067 | return rc; | |
2068 | } | |
2069 | ||
2070 | ||
2071 | int cpqhp_process_SS(struct controller *ctrl, struct pci_func *func) | |
2072 | { | |
2073 | u8 device, class_code, header_type, BCR; | |
2074 | u8 index = 0; | |
2075 | u8 replace_flag; | |
2076 | u32 rc = 0; | |
2077 | unsigned int devfn; | |
2078 | struct slot* p_slot; | |
2079 | struct pci_bus *pci_bus = ctrl->pci_bus; | |
2080 | int physical_slot=0; | |
2081 | ||
2082 | device = func->device; | |
2083 | func = cpqhp_slot_find(ctrl->bus, device, index++); | |
2084 | p_slot = cpqhp_find_slot(ctrl, device); | |
2085 | if (p_slot) { | |
2086 | physical_slot = p_slot->number; | |
2087 | } | |
2088 | ||
2089 | /* Make sure there are no video controllers here */ | |
2090 | while (func && !rc) { | |
2091 | pci_bus->number = func->bus; | |
2092 | devfn = PCI_DEVFN(func->device, func->function); | |
2093 | ||
2094 | /* Check the Class Code */ | |
2095 | rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code); | |
2096 | if (rc) | |
2097 | return rc; | |
2098 | ||
2099 | if (class_code == PCI_BASE_CLASS_DISPLAY) { | |
2100 | /* Display/Video adapter (not supported) */ | |
2101 | rc = REMOVE_NOT_SUPPORTED; | |
2102 | } else { | |
2103 | /* See if it's a bridge */ | |
2104 | rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type); | |
2105 | if (rc) | |
2106 | return rc; | |
2107 | ||
2108 | /* If it's a bridge, check the VGA Enable bit */ | |
2109 | if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { | |
2110 | rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_BRIDGE_CONTROL, &BCR); | |
2111 | if (rc) | |
2112 | return rc; | |
2113 | ||
2114 | /* If the VGA Enable bit is set, remove isn't | |
2115 | * supported */ | |
2116 | if (BCR & PCI_BRIDGE_CTL_VGA) { | |
2117 | rc = REMOVE_NOT_SUPPORTED; | |
2118 | } | |
2119 | } | |
2120 | } | |
2121 | ||
2122 | func = cpqhp_slot_find(ctrl->bus, device, index++); | |
2123 | } | |
2124 | ||
2125 | func = cpqhp_slot_find(ctrl->bus, device, 0); | |
2126 | if ((func != NULL) && !rc) { | |
2127 | /* FIXME: Replace flag should be passed into process_SS */ | |
2128 | replace_flag = !(ctrl->add_support); | |
2129 | rc = remove_board(func, replace_flag, ctrl); | |
2130 | } else if (!rc) { | |
2131 | rc = 1; | |
2132 | } | |
2133 | ||
2134 | if (p_slot) | |
2135 | update_slot_info(ctrl, p_slot); | |
2136 | ||
2137 | return rc; | |
2138 | } | |
2139 | ||
2140 | /** | |
26e6c66e | 2141 | * switch_leds - switch the leds, go from one site to the other. |
1da177e4 LT |
2142 | * @ctrl: controller to use |
2143 | * @num_of_slots: number of slots to use | |
26e6c66e | 2144 | * @work_LED: LED control value |
1da177e4 LT |
2145 | * @direction: 1 to start from the left side, 0 to start right. |
2146 | */ | |
2147 | static void switch_leds(struct controller *ctrl, const int num_of_slots, | |
2148 | u32 *work_LED, const int direction) | |
2149 | { | |
2150 | int loop; | |
2151 | ||
2152 | for (loop = 0; loop < num_of_slots; loop++) { | |
2153 | if (direction) | |
2154 | *work_LED = *work_LED >> 1; | |
2155 | else | |
2156 | *work_LED = *work_LED << 1; | |
2157 | writel(*work_LED, ctrl->hpc_reg + LED_CONTROL); | |
2158 | ||
2159 | set_SOGO(ctrl); | |
2160 | ||
2161 | /* Wait for SOGO interrupt */ | |
2162 | wait_for_ctrl_irq(ctrl); | |
2163 | ||
2164 | /* Get ready for next iteration */ | |
2165 | long_delay((2*HZ)/10); | |
2166 | } | |
2167 | } | |
2168 | ||
2169 | /** | |
26e6c66e RD |
2170 | * cpqhp_hardware_test - runs hardware tests |
2171 | * @ctrl: target controller | |
2172 | * @test_num: the number written to the "test" file in sysfs. | |
1da177e4 LT |
2173 | * |
2174 | * For hot plug ctrl folks to play with. | |
1da177e4 LT |
2175 | */ |
2176 | int cpqhp_hardware_test(struct controller *ctrl, int test_num) | |
2177 | { | |
2178 | u32 save_LED; | |
2179 | u32 work_LED; | |
2180 | int loop; | |
2181 | int num_of_slots; | |
2182 | ||
2183 | num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0f; | |
2184 | ||
2185 | switch (test_num) { | |
2186 | case 1: | |
2187 | /* Do stuff here! */ | |
2188 | ||
2189 | /* Do that funky LED thing */ | |
2190 | /* so we can restore them later */ | |
2191 | save_LED = readl(ctrl->hpc_reg + LED_CONTROL); | |
2192 | work_LED = 0x01010101; | |
2193 | switch_leds(ctrl, num_of_slots, &work_LED, 0); | |
2194 | switch_leds(ctrl, num_of_slots, &work_LED, 1); | |
2195 | switch_leds(ctrl, num_of_slots, &work_LED, 0); | |
2196 | switch_leds(ctrl, num_of_slots, &work_LED, 1); | |
2197 | ||
2198 | work_LED = 0x01010000; | |
2199 | writel(work_LED, ctrl->hpc_reg + LED_CONTROL); | |
2200 | switch_leds(ctrl, num_of_slots, &work_LED, 0); | |
2201 | switch_leds(ctrl, num_of_slots, &work_LED, 1); | |
2202 | work_LED = 0x00000101; | |
2203 | writel(work_LED, ctrl->hpc_reg + LED_CONTROL); | |
2204 | switch_leds(ctrl, num_of_slots, &work_LED, 0); | |
2205 | switch_leds(ctrl, num_of_slots, &work_LED, 1); | |
2206 | ||
2207 | work_LED = 0x01010000; | |
2208 | writel(work_LED, ctrl->hpc_reg + LED_CONTROL); | |
2209 | for (loop = 0; loop < num_of_slots; loop++) { | |
2210 | set_SOGO(ctrl); | |
2211 | ||
2212 | /* Wait for SOGO interrupt */ | |
2213 | wait_for_ctrl_irq (ctrl); | |
2214 | ||
2215 | /* Get ready for next iteration */ | |
2216 | long_delay((3*HZ)/10); | |
2217 | work_LED = work_LED >> 16; | |
2218 | writel(work_LED, ctrl->hpc_reg + LED_CONTROL); | |
2219 | ||
2220 | set_SOGO(ctrl); | |
2221 | ||
2222 | /* Wait for SOGO interrupt */ | |
2223 | wait_for_ctrl_irq (ctrl); | |
2224 | ||
2225 | /* Get ready for next iteration */ | |
2226 | long_delay((3*HZ)/10); | |
2227 | work_LED = work_LED << 16; | |
2228 | writel(work_LED, ctrl->hpc_reg + LED_CONTROL); | |
2229 | work_LED = work_LED << 1; | |
2230 | writel(work_LED, ctrl->hpc_reg + LED_CONTROL); | |
2231 | } | |
2232 | ||
2233 | /* put it back the way it was */ | |
2234 | writel(save_LED, ctrl->hpc_reg + LED_CONTROL); | |
2235 | ||
2236 | set_SOGO(ctrl); | |
2237 | ||
2238 | /* Wait for SOBS to be unset */ | |
2239 | wait_for_ctrl_irq (ctrl); | |
2240 | break; | |
2241 | case 2: | |
2242 | /* Do other stuff here! */ | |
2243 | break; | |
2244 | case 3: | |
2245 | /* and more... */ | |
2246 | break; | |
2247 | } | |
2248 | return 0; | |
2249 | } | |
2250 | ||
2251 | ||
2252 | /** | |
2253 | * configure_new_device - Configures the PCI header information of one board. | |
1da177e4 LT |
2254 | * @ctrl: pointer to controller structure |
2255 | * @func: pointer to function structure | |
2256 | * @behind_bridge: 1 if this is a recursive call, 0 if not | |
2257 | * @resources: pointer to set of resource lists | |
2258 | * | |
26e6c66e | 2259 | * Returns 0 if success. |
1da177e4 LT |
2260 | */ |
2261 | static u32 configure_new_device(struct controller * ctrl, struct pci_func * func, | |
2262 | u8 behind_bridge, struct resource_lists * resources) | |
2263 | { | |
2264 | u8 temp_byte, function, max_functions, stop_it; | |
2265 | int rc; | |
2266 | u32 ID; | |
2267 | struct pci_func *new_slot; | |
2268 | int index; | |
2269 | ||
2270 | new_slot = func; | |
2271 | ||
66bef8c0 | 2272 | dbg("%s\n", __func__); |
1da177e4 LT |
2273 | /* Check for Multi-function device */ |
2274 | ctrl->pci_bus->number = func->bus; | |
2275 | rc = pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(func->device, func->function), 0x0E, &temp_byte); | |
2276 | if (rc) { | |
66bef8c0 | 2277 | dbg("%s: rc = %d\n", __func__, rc); |
1da177e4 LT |
2278 | return rc; |
2279 | } | |
2280 | ||
2281 | if (temp_byte & 0x80) /* Multi-function device */ | |
2282 | max_functions = 8; | |
2283 | else | |
2284 | max_functions = 1; | |
2285 | ||
2286 | function = 0; | |
2287 | ||
2288 | do { | |
2289 | rc = configure_new_function(ctrl, new_slot, behind_bridge, resources); | |
2290 | ||
2291 | if (rc) { | |
2292 | dbg("configure_new_function failed %d\n",rc); | |
2293 | index = 0; | |
2294 | ||
2295 | while (new_slot) { | |
2296 | new_slot = cpqhp_slot_find(new_slot->bus, new_slot->device, index++); | |
2297 | ||
2298 | if (new_slot) | |
2299 | cpqhp_return_board_resources(new_slot, resources); | |
2300 | } | |
2301 | ||
2302 | return rc; | |
2303 | } | |
2304 | ||
2305 | function++; | |
2306 | ||
2307 | stop_it = 0; | |
2308 | ||
2309 | /* The following loop skips to the next present function | |
2310 | * and creates a board structure */ | |
2311 | ||
2312 | while ((function < max_functions) && (!stop_it)) { | |
2313 | pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(func->device, function), 0x00, &ID); | |
2314 | ||
2315 | if (ID == 0xFFFFFFFF) { /* There's nothing there. */ | |
2316 | function++; | |
2317 | } else { /* There's something there */ | |
2318 | /* Setup slot structure. */ | |
2319 | new_slot = cpqhp_slot_create(func->bus); | |
2320 | ||
2321 | if (new_slot == NULL) | |
2322 | return 1; | |
2323 | ||
2324 | new_slot->bus = func->bus; | |
2325 | new_slot->device = func->device; | |
2326 | new_slot->function = function; | |
2327 | new_slot->is_a_board = 1; | |
2328 | new_slot->status = 0; | |
2329 | ||
2330 | stop_it++; | |
2331 | } | |
2332 | } | |
2333 | ||
2334 | } while (function < max_functions); | |
2335 | dbg("returning from configure_new_device\n"); | |
2336 | ||
2337 | return 0; | |
2338 | } | |
2339 | ||
2340 | ||
2341 | /* | |
2342 | Configuration logic that involves the hotplug data structures and | |
2343 | their bookkeeping | |
2344 | */ | |
2345 | ||
2346 | ||
2347 | /** | |
2348 | * configure_new_function - Configures the PCI header information of one device | |
1da177e4 LT |
2349 | * @ctrl: pointer to controller structure |
2350 | * @func: pointer to function structure | |
2351 | * @behind_bridge: 1 if this is a recursive call, 0 if not | |
2352 | * @resources: pointer to set of resource lists | |
2353 | * | |
2354 | * Calls itself recursively for bridged devices. | |
26e6c66e | 2355 | * Returns 0 if success. |
1da177e4 LT |
2356 | */ |
2357 | static int configure_new_function(struct controller *ctrl, struct pci_func *func, | |
2358 | u8 behind_bridge, | |
2359 | struct resource_lists *resources) | |
2360 | { | |
2361 | int cloop; | |
2362 | u8 IRQ = 0; | |
2363 | u8 temp_byte; | |
2364 | u8 device; | |
2365 | u8 class_code; | |
2366 | u16 command; | |
2367 | u16 temp_word; | |
2368 | u32 temp_dword; | |
2369 | u32 rc; | |
2370 | u32 temp_register; | |
2371 | u32 base; | |
2372 | u32 ID; | |
2373 | unsigned int devfn; | |
2374 | struct pci_resource *mem_node; | |
2375 | struct pci_resource *p_mem_node; | |
2376 | struct pci_resource *io_node; | |
2377 | struct pci_resource *bus_node; | |
2378 | struct pci_resource *hold_mem_node; | |
2379 | struct pci_resource *hold_p_mem_node; | |
2380 | struct pci_resource *hold_IO_node; | |
2381 | struct pci_resource *hold_bus_node; | |
2382 | struct irq_mapping irqs; | |
2383 | struct pci_func *new_slot; | |
2384 | struct pci_bus *pci_bus; | |
2385 | struct resource_lists temp_resources; | |
2386 | ||
2387 | pci_bus = ctrl->pci_bus; | |
2388 | pci_bus->number = func->bus; | |
2389 | devfn = PCI_DEVFN(func->device, func->function); | |
2390 | ||
2391 | /* Check for Bridge */ | |
2392 | rc = pci_bus_read_config_byte(pci_bus, devfn, PCI_HEADER_TYPE, &temp_byte); | |
2393 | if (rc) | |
2394 | return rc; | |
2395 | ||
2396 | if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { /* PCI-PCI Bridge */ | |
2397 | /* set Primary bus */ | |
2398 | dbg("set Primary bus = %d\n", func->bus); | |
2399 | rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_PRIMARY_BUS, func->bus); | |
2400 | if (rc) | |
2401 | return rc; | |
2402 | ||
2403 | /* find range of busses to use */ | |
2404 | dbg("find ranges of buses to use\n"); | |
2405 | bus_node = get_max_resource(&(resources->bus_head), 1); | |
2406 | ||
2407 | /* If we don't have any busses to allocate, we can't continue */ | |
2408 | if (!bus_node) | |
2409 | return -ENOMEM; | |
2410 | ||
2411 | /* set Secondary bus */ | |
2412 | temp_byte = bus_node->base; | |
2413 | dbg("set Secondary bus = %d\n", bus_node->base); | |
2414 | rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SECONDARY_BUS, temp_byte); | |
2415 | if (rc) | |
2416 | return rc; | |
2417 | ||
2418 | /* set subordinate bus */ | |
2419 | temp_byte = bus_node->base + bus_node->length - 1; | |
2420 | dbg("set subordinate bus = %d\n", bus_node->base + bus_node->length - 1); | |
2421 | rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte); | |
2422 | if (rc) | |
2423 | return rc; | |
2424 | ||
2425 | /* set subordinate Latency Timer and base Latency Timer */ | |
2426 | temp_byte = 0x40; | |
2427 | rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, temp_byte); | |
2428 | if (rc) | |
2429 | return rc; | |
2430 | rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, temp_byte); | |
2431 | if (rc) | |
2432 | return rc; | |
2433 | ||
2434 | /* set Cache Line size */ | |
2435 | temp_byte = 0x08; | |
2436 | rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, temp_byte); | |
2437 | if (rc) | |
2438 | return rc; | |
2439 | ||
2440 | /* Setup the IO, memory, and prefetchable windows */ | |
2441 | io_node = get_max_resource(&(resources->io_head), 0x1000); | |
2442 | if (!io_node) | |
2443 | return -ENOMEM; | |
2444 | mem_node = get_max_resource(&(resources->mem_head), 0x100000); | |
2445 | if (!mem_node) | |
2446 | return -ENOMEM; | |
2447 | p_mem_node = get_max_resource(&(resources->p_mem_head), 0x100000); | |
2448 | if (!p_mem_node) | |
2449 | return -ENOMEM; | |
2450 | dbg("Setup the IO, memory, and prefetchable windows\n"); | |
2451 | dbg("io_node\n"); | |
2452 | dbg("(base, len, next) (%x, %x, %p)\n", io_node->base, | |
2453 | io_node->length, io_node->next); | |
2454 | dbg("mem_node\n"); | |
2455 | dbg("(base, len, next) (%x, %x, %p)\n", mem_node->base, | |
2456 | mem_node->length, mem_node->next); | |
2457 | dbg("p_mem_node\n"); | |
2458 | dbg("(base, len, next) (%x, %x, %p)\n", p_mem_node->base, | |
2459 | p_mem_node->length, p_mem_node->next); | |
2460 | ||
2461 | /* set up the IRQ info */ | |
2462 | if (!resources->irqs) { | |
2463 | irqs.barber_pole = 0; | |
2464 | irqs.interrupt[0] = 0; | |
2465 | irqs.interrupt[1] = 0; | |
2466 | irqs.interrupt[2] = 0; | |
2467 | irqs.interrupt[3] = 0; | |
2468 | irqs.valid_INT = 0; | |
2469 | } else { | |
2470 | irqs.barber_pole = resources->irqs->barber_pole; | |
2471 | irqs.interrupt[0] = resources->irqs->interrupt[0]; | |
2472 | irqs.interrupt[1] = resources->irqs->interrupt[1]; | |
2473 | irqs.interrupt[2] = resources->irqs->interrupt[2]; | |
2474 | irqs.interrupt[3] = resources->irqs->interrupt[3]; | |
2475 | irqs.valid_INT = resources->irqs->valid_INT; | |
2476 | } | |
2477 | ||
2478 | /* set up resource lists that are now aligned on top and bottom | |
2479 | * for anything behind the bridge. */ | |
2480 | temp_resources.bus_head = bus_node; | |
2481 | temp_resources.io_head = io_node; | |
2482 | temp_resources.mem_head = mem_node; | |
2483 | temp_resources.p_mem_head = p_mem_node; | |
2484 | temp_resources.irqs = &irqs; | |
2485 | ||
2486 | /* Make copies of the nodes we are going to pass down so that | |
2487 | * if there is a problem,we can just use these to free resources */ | |
2488 | hold_bus_node = kmalloc(sizeof(*hold_bus_node), GFP_KERNEL); | |
2489 | hold_IO_node = kmalloc(sizeof(*hold_IO_node), GFP_KERNEL); | |
2490 | hold_mem_node = kmalloc(sizeof(*hold_mem_node), GFP_KERNEL); | |
2491 | hold_p_mem_node = kmalloc(sizeof(*hold_p_mem_node), GFP_KERNEL); | |
2492 | ||
2493 | if (!hold_bus_node || !hold_IO_node || !hold_mem_node || !hold_p_mem_node) { | |
2494 | kfree(hold_bus_node); | |
2495 | kfree(hold_IO_node); | |
2496 | kfree(hold_mem_node); | |
2497 | kfree(hold_p_mem_node); | |
2498 | ||
2499 | return 1; | |
2500 | } | |
2501 | ||
2502 | memcpy(hold_bus_node, bus_node, sizeof(struct pci_resource)); | |
2503 | ||
2504 | bus_node->base += 1; | |
2505 | bus_node->length -= 1; | |
2506 | bus_node->next = NULL; | |
2507 | ||
2508 | /* If we have IO resources copy them and fill in the bridge's | |
2509 | * IO range registers */ | |
2510 | if (io_node) { | |
2511 | memcpy(hold_IO_node, io_node, sizeof(struct pci_resource)); | |
2512 | io_node->next = NULL; | |
2513 | ||
2514 | /* set IO base and Limit registers */ | |
2515 | temp_byte = io_node->base >> 8; | |
2516 | rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_BASE, temp_byte); | |
2517 | ||
2518 | temp_byte = (io_node->base + io_node->length - 1) >> 8; | |
2519 | rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_LIMIT, temp_byte); | |
2520 | } else { | |
2521 | kfree(hold_IO_node); | |
2522 | hold_IO_node = NULL; | |
2523 | } | |
2524 | ||
2525 | /* If we have memory resources copy them and fill in the | |
2526 | * bridge's memory range registers. Otherwise, fill in the | |
2527 | * range registers with values that disable them. */ | |
2528 | if (mem_node) { | |
2529 | memcpy(hold_mem_node, mem_node, sizeof(struct pci_resource)); | |
2530 | mem_node->next = NULL; | |
2531 | ||
2532 | /* set Mem base and Limit registers */ | |
2533 | temp_word = mem_node->base >> 16; | |
2534 | rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_BASE, temp_word); | |
2535 | ||
2536 | temp_word = (mem_node->base + mem_node->length - 1) >> 16; | |
2537 | rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word); | |
2538 | } else { | |
2539 | temp_word = 0xFFFF; | |
2540 | rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_BASE, temp_word); | |
2541 | ||
2542 | temp_word = 0x0000; | |
2543 | rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word); | |
2544 | ||
2545 | kfree(hold_mem_node); | |
2546 | hold_mem_node = NULL; | |
2547 | } | |
2548 | ||
2555f7bd AB |
2549 | memcpy(hold_p_mem_node, p_mem_node, sizeof(struct pci_resource)); |
2550 | p_mem_node->next = NULL; | |
1da177e4 | 2551 | |
2555f7bd AB |
2552 | /* set Pre Mem base and Limit registers */ |
2553 | temp_word = p_mem_node->base >> 16; | |
2554 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word); | |
1da177e4 | 2555 | |
2555f7bd AB |
2556 | temp_word = (p_mem_node->base + p_mem_node->length - 1) >> 16; |
2557 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word); | |
1da177e4 LT |
2558 | |
2559 | /* Adjust this to compensate for extra adjustment in first loop */ | |
2560 | irqs.barber_pole--; | |
2561 | ||
2562 | rc = 0; | |
2563 | ||
2564 | /* Here we actually find the devices and configure them */ | |
2565 | for (device = 0; (device <= 0x1F) && !rc; device++) { | |
2566 | irqs.barber_pole = (irqs.barber_pole + 1) & 0x03; | |
2567 | ||
2568 | ID = 0xFFFFFFFF; | |
2569 | pci_bus->number = hold_bus_node->base; | |
2570 | pci_bus_read_config_dword (pci_bus, PCI_DEVFN(device, 0), 0x00, &ID); | |
2571 | pci_bus->number = func->bus; | |
2572 | ||
2573 | if (ID != 0xFFFFFFFF) { /* device present */ | |
2574 | /* Setup slot structure. */ | |
2575 | new_slot = cpqhp_slot_create(hold_bus_node->base); | |
2576 | ||
2577 | if (new_slot == NULL) { | |
2578 | rc = -ENOMEM; | |
2579 | continue; | |
2580 | } | |
2581 | ||
2582 | new_slot->bus = hold_bus_node->base; | |
2583 | new_slot->device = device; | |
2584 | new_slot->function = 0; | |
2585 | new_slot->is_a_board = 1; | |
2586 | new_slot->status = 0; | |
2587 | ||
2588 | rc = configure_new_device(ctrl, new_slot, 1, &temp_resources); | |
2589 | dbg("configure_new_device rc=0x%x\n",rc); | |
2590 | } /* End of IF (device in slot?) */ | |
2591 | } /* End of FOR loop */ | |
2592 | ||
2593 | if (rc) | |
2594 | goto free_and_out; | |
2595 | /* save the interrupt routing information */ | |
2596 | if (resources->irqs) { | |
2597 | resources->irqs->interrupt[0] = irqs.interrupt[0]; | |
2598 | resources->irqs->interrupt[1] = irqs.interrupt[1]; | |
2599 | resources->irqs->interrupt[2] = irqs.interrupt[2]; | |
2600 | resources->irqs->interrupt[3] = irqs.interrupt[3]; | |
2601 | resources->irqs->valid_INT = irqs.valid_INT; | |
2602 | } else if (!behind_bridge) { | |
2603 | /* We need to hook up the interrupts here */ | |
2604 | for (cloop = 0; cloop < 4; cloop++) { | |
2605 | if (irqs.valid_INT & (0x01 << cloop)) { | |
2606 | rc = cpqhp_set_irq(func->bus, func->device, | |
2607 | 0x0A + cloop, irqs.interrupt[cloop]); | |
2608 | if (rc) | |
2609 | goto free_and_out; | |
2610 | } | |
2611 | } /* end of for loop */ | |
2612 | } | |
2613 | /* Return unused bus resources | |
2614 | * First use the temporary node to store information for | |
2615 | * the board */ | |
2616 | if (hold_bus_node && bus_node && temp_resources.bus_head) { | |
2617 | hold_bus_node->length = bus_node->base - hold_bus_node->base; | |
2618 | ||
2619 | hold_bus_node->next = func->bus_head; | |
2620 | func->bus_head = hold_bus_node; | |
2621 | ||
2622 | temp_byte = temp_resources.bus_head->base - 1; | |
2623 | ||
2624 | /* set subordinate bus */ | |
2625 | rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte); | |
2626 | ||
2627 | if (temp_resources.bus_head->length == 0) { | |
2628 | kfree(temp_resources.bus_head); | |
2629 | temp_resources.bus_head = NULL; | |
2630 | } else { | |
2631 | return_resource(&(resources->bus_head), temp_resources.bus_head); | |
2632 | } | |
2633 | } | |
2634 | ||
2635 | /* If we have IO space available and there is some left, | |
2636 | * return the unused portion */ | |
2637 | if (hold_IO_node && temp_resources.io_head) { | |
2638 | io_node = do_pre_bridge_resource_split(&(temp_resources.io_head), | |
2639 | &hold_IO_node, 0x1000); | |
2640 | ||
2641 | /* Check if we were able to split something off */ | |
2642 | if (io_node) { | |
2643 | hold_IO_node->base = io_node->base + io_node->length; | |
2644 | ||
2645 | temp_byte = (hold_IO_node->base) >> 8; | |
2646 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_IO_BASE, temp_byte); | |
2647 | ||
2648 | return_resource(&(resources->io_head), io_node); | |
2649 | } | |
2650 | ||
2651 | io_node = do_bridge_resource_split(&(temp_resources.io_head), 0x1000); | |
2652 | ||
2653 | /* Check if we were able to split something off */ | |
2654 | if (io_node) { | |
2655 | /* First use the temporary node to store | |
2656 | * information for the board */ | |
2657 | hold_IO_node->length = io_node->base - hold_IO_node->base; | |
2658 | ||
2659 | /* If we used any, add it to the board's list */ | |
2660 | if (hold_IO_node->length) { | |
2661 | hold_IO_node->next = func->io_head; | |
2662 | func->io_head = hold_IO_node; | |
2663 | ||
2664 | temp_byte = (io_node->base - 1) >> 8; | |
2665 | rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_IO_LIMIT, temp_byte); | |
2666 | ||
2667 | return_resource(&(resources->io_head), io_node); | |
2668 | } else { | |
2669 | /* it doesn't need any IO */ | |
2670 | temp_word = 0x0000; | |
2671 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_IO_LIMIT, temp_word); | |
2672 | ||
2673 | return_resource(&(resources->io_head), io_node); | |
2674 | kfree(hold_IO_node); | |
2675 | } | |
2676 | } else { | |
2677 | /* it used most of the range */ | |
2678 | hold_IO_node->next = func->io_head; | |
2679 | func->io_head = hold_IO_node; | |
2680 | } | |
2681 | } else if (hold_IO_node) { | |
2682 | /* it used the whole range */ | |
2683 | hold_IO_node->next = func->io_head; | |
2684 | func->io_head = hold_IO_node; | |
2685 | } | |
2686 | /* If we have memory space available and there is some left, | |
2687 | * return the unused portion */ | |
2688 | if (hold_mem_node && temp_resources.mem_head) { | |
2689 | mem_node = do_pre_bridge_resource_split(&(temp_resources. mem_head), | |
2690 | &hold_mem_node, 0x100000); | |
2691 | ||
2692 | /* Check if we were able to split something off */ | |
2693 | if (mem_node) { | |
2694 | hold_mem_node->base = mem_node->base + mem_node->length; | |
2695 | ||
2696 | temp_word = (hold_mem_node->base) >> 16; | |
2697 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_BASE, temp_word); | |
2698 | ||
2699 | return_resource(&(resources->mem_head), mem_node); | |
2700 | } | |
2701 | ||
2702 | mem_node = do_bridge_resource_split(&(temp_resources.mem_head), 0x100000); | |
2703 | ||
2704 | /* Check if we were able to split something off */ | |
2705 | if (mem_node) { | |
2706 | /* First use the temporary node to store | |
2707 | * information for the board */ | |
2708 | hold_mem_node->length = mem_node->base - hold_mem_node->base; | |
2709 | ||
2710 | if (hold_mem_node->length) { | |
2711 | hold_mem_node->next = func->mem_head; | |
2712 | func->mem_head = hold_mem_node; | |
2713 | ||
2714 | /* configure end address */ | |
2715 | temp_word = (mem_node->base - 1) >> 16; | |
2716 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word); | |
2717 | ||
2718 | /* Return unused resources to the pool */ | |
2719 | return_resource(&(resources->mem_head), mem_node); | |
2720 | } else { | |
2721 | /* it doesn't need any Mem */ | |
2722 | temp_word = 0x0000; | |
2723 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word); | |
2724 | ||
2725 | return_resource(&(resources->mem_head), mem_node); | |
2726 | kfree(hold_mem_node); | |
2727 | } | |
2728 | } else { | |
2729 | /* it used most of the range */ | |
2730 | hold_mem_node->next = func->mem_head; | |
2731 | func->mem_head = hold_mem_node; | |
2732 | } | |
2733 | } else if (hold_mem_node) { | |
2734 | /* it used the whole range */ | |
2735 | hold_mem_node->next = func->mem_head; | |
2736 | func->mem_head = hold_mem_node; | |
2737 | } | |
2738 | /* If we have prefetchable memory space available and there | |
2739 | * is some left at the end, return the unused portion */ | |
2740 | if (hold_p_mem_node && temp_resources.p_mem_head) { | |
2741 | p_mem_node = do_pre_bridge_resource_split(&(temp_resources.p_mem_head), | |
2742 | &hold_p_mem_node, 0x100000); | |
2743 | ||
2744 | /* Check if we were able to split something off */ | |
2745 | if (p_mem_node) { | |
2746 | hold_p_mem_node->base = p_mem_node->base + p_mem_node->length; | |
2747 | ||
2748 | temp_word = (hold_p_mem_node->base) >> 16; | |
2749 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word); | |
2750 | ||
2751 | return_resource(&(resources->p_mem_head), p_mem_node); | |
2752 | } | |
2753 | ||
2754 | p_mem_node = do_bridge_resource_split(&(temp_resources.p_mem_head), 0x100000); | |
2755 | ||
2756 | /* Check if we were able to split something off */ | |
2757 | if (p_mem_node) { | |
2758 | /* First use the temporary node to store | |
2759 | * information for the board */ | |
2760 | hold_p_mem_node->length = p_mem_node->base - hold_p_mem_node->base; | |
2761 | ||
2762 | /* If we used any, add it to the board's list */ | |
2763 | if (hold_p_mem_node->length) { | |
2764 | hold_p_mem_node->next = func->p_mem_head; | |
2765 | func->p_mem_head = hold_p_mem_node; | |
2766 | ||
2767 | temp_word = (p_mem_node->base - 1) >> 16; | |
2768 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word); | |
2769 | ||
2770 | return_resource(&(resources->p_mem_head), p_mem_node); | |
2771 | } else { | |
2772 | /* it doesn't need any PMem */ | |
2773 | temp_word = 0x0000; | |
2774 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word); | |
2775 | ||
2776 | return_resource(&(resources->p_mem_head), p_mem_node); | |
2777 | kfree(hold_p_mem_node); | |
2778 | } | |
2779 | } else { | |
2780 | /* it used the most of the range */ | |
2781 | hold_p_mem_node->next = func->p_mem_head; | |
2782 | func->p_mem_head = hold_p_mem_node; | |
2783 | } | |
2784 | } else if (hold_p_mem_node) { | |
2785 | /* it used the whole range */ | |
2786 | hold_p_mem_node->next = func->p_mem_head; | |
2787 | func->p_mem_head = hold_p_mem_node; | |
2788 | } | |
2789 | /* We should be configuring an IRQ and the bridge's base address | |
2790 | * registers if it needs them. Although we have never seen such | |
2791 | * a device */ | |
2792 | ||
2793 | /* enable card */ | |
2794 | command = 0x0157; /* = PCI_COMMAND_IO | | |
2795 | * PCI_COMMAND_MEMORY | | |
2796 | * PCI_COMMAND_MASTER | | |
2797 | * PCI_COMMAND_INVALIDATE | | |
2798 | * PCI_COMMAND_PARITY | | |
2799 | * PCI_COMMAND_SERR */ | |
2800 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_COMMAND, command); | |
2801 | ||
2802 | /* set Bridge Control Register */ | |
2803 | command = 0x07; /* = PCI_BRIDGE_CTL_PARITY | | |
2804 | * PCI_BRIDGE_CTL_SERR | | |
2805 | * PCI_BRIDGE_CTL_NO_ISA */ | |
2806 | rc = pci_bus_write_config_word (pci_bus, devfn, PCI_BRIDGE_CONTROL, command); | |
2807 | } else if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_NORMAL) { | |
2808 | /* Standard device */ | |
2809 | rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code); | |
2810 | ||
2811 | if (class_code == PCI_BASE_CLASS_DISPLAY) { | |
2812 | /* Display (video) adapter (not supported) */ | |
2813 | return DEVICE_TYPE_NOT_SUPPORTED; | |
2814 | } | |
2815 | /* Figure out IO and memory needs */ | |
2816 | for (cloop = 0x10; cloop <= 0x24; cloop += 4) { | |
2817 | temp_register = 0xFFFFFFFF; | |
2818 | ||
2819 | dbg("CND: bus=%d, devfn=%d, offset=%d\n", pci_bus->number, devfn, cloop); | |
2820 | rc = pci_bus_write_config_dword (pci_bus, devfn, cloop, temp_register); | |
2821 | ||
2822 | rc = pci_bus_read_config_dword (pci_bus, devfn, cloop, &temp_register); | |
2823 | dbg("CND: base = 0x%x\n", temp_register); | |
2824 | ||
2825 | if (temp_register) { /* If this register is implemented */ | |
2826 | if ((temp_register & 0x03L) == 0x01) { | |
2827 | /* Map IO */ | |
2828 | ||
2829 | /* set base = amount of IO space */ | |
2830 | base = temp_register & 0xFFFFFFFC; | |
2831 | base = ~base + 1; | |
2832 | ||
2833 | dbg("CND: length = 0x%x\n", base); | |
2834 | io_node = get_io_resource(&(resources->io_head), base); | |
2835 | dbg("Got io_node start = %8.8x, length = %8.8x next (%p)\n", | |
2836 | io_node->base, io_node->length, io_node->next); | |
2837 | dbg("func (%p) io_head (%p)\n", func, func->io_head); | |
2838 | ||
2839 | /* allocate the resource to the board */ | |
2840 | if (io_node) { | |
2841 | base = io_node->base; | |
2842 | ||
2843 | io_node->next = func->io_head; | |
2844 | func->io_head = io_node; | |
2845 | } else | |
2846 | return -ENOMEM; | |
2847 | } else if ((temp_register & 0x0BL) == 0x08) { | |
2848 | /* Map prefetchable memory */ | |
2849 | base = temp_register & 0xFFFFFFF0; | |
2850 | base = ~base + 1; | |
2851 | ||
2852 | dbg("CND: length = 0x%x\n", base); | |
2853 | p_mem_node = get_resource(&(resources->p_mem_head), base); | |
2854 | ||
2855 | /* allocate the resource to the board */ | |
2856 | if (p_mem_node) { | |
2857 | base = p_mem_node->base; | |
2858 | ||
2859 | p_mem_node->next = func->p_mem_head; | |
2860 | func->p_mem_head = p_mem_node; | |
2861 | } else | |
2862 | return -ENOMEM; | |
2863 | } else if ((temp_register & 0x0BL) == 0x00) { | |
2864 | /* Map memory */ | |
2865 | base = temp_register & 0xFFFFFFF0; | |
2866 | base = ~base + 1; | |
2867 | ||
2868 | dbg("CND: length = 0x%x\n", base); | |
2869 | mem_node = get_resource(&(resources->mem_head), base); | |
2870 | ||
2871 | /* allocate the resource to the board */ | |
2872 | if (mem_node) { | |
2873 | base = mem_node->base; | |
2874 | ||
2875 | mem_node->next = func->mem_head; | |
2876 | func->mem_head = mem_node; | |
2877 | } else | |
2878 | return -ENOMEM; | |
2879 | } else if ((temp_register & 0x0BL) == 0x04) { | |
2880 | /* Map memory */ | |
2881 | base = temp_register & 0xFFFFFFF0; | |
2882 | base = ~base + 1; | |
2883 | ||
2884 | dbg("CND: length = 0x%x\n", base); | |
2885 | mem_node = get_resource(&(resources->mem_head), base); | |
2886 | ||
2887 | /* allocate the resource to the board */ | |
2888 | if (mem_node) { | |
2889 | base = mem_node->base; | |
2890 | ||
2891 | mem_node->next = func->mem_head; | |
2892 | func->mem_head = mem_node; | |
2893 | } else | |
2894 | return -ENOMEM; | |
2895 | } else if ((temp_register & 0x0BL) == 0x06) { | |
2896 | /* Those bits are reserved, we can't handle this */ | |
2897 | return 1; | |
2898 | } else { | |
2899 | /* Requesting space below 1M */ | |
2900 | return NOT_ENOUGH_RESOURCES; | |
2901 | } | |
2902 | ||
2903 | rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, base); | |
2904 | ||
2905 | /* Check for 64-bit base */ | |
2906 | if ((temp_register & 0x07L) == 0x04) { | |
2907 | cloop += 4; | |
2908 | ||
2909 | /* Upper 32 bits of address always zero | |
2910 | * on today's systems */ | |
2911 | /* FIXME this is probably not true on | |
2912 | * Alpha and ia64??? */ | |
2913 | base = 0; | |
2914 | rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, base); | |
2915 | } | |
2916 | } | |
2917 | } /* End of base register loop */ | |
2918 | if (cpqhp_legacy_mode) { | |
2919 | /* Figure out which interrupt pin this function uses */ | |
2920 | rc = pci_bus_read_config_byte (pci_bus, devfn, | |
2921 | PCI_INTERRUPT_PIN, &temp_byte); | |
2922 | ||
2923 | /* If this function needs an interrupt and we are behind | |
2924 | * a bridge and the pin is tied to something that's | |
2925 | * alread mapped, set this one the same */ | |
2926 | if (temp_byte && resources->irqs && | |
2927 | (resources->irqs->valid_INT & | |
2928 | (0x01 << ((temp_byte + resources->irqs->barber_pole - 1) & 0x03)))) { | |
2929 | /* We have to share with something already set up */ | |
2930 | IRQ = resources->irqs->interrupt[(temp_byte + | |
2931 | resources->irqs->barber_pole - 1) & 0x03]; | |
2932 | } else { | |
2933 | /* Program IRQ based on card type */ | |
2934 | rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code); | |
2935 | ||
2936 | if (class_code == PCI_BASE_CLASS_STORAGE) { | |
2937 | IRQ = cpqhp_disk_irq; | |
2938 | } else { | |
2939 | IRQ = cpqhp_nic_irq; | |
2940 | } | |
2941 | } | |
2942 | ||
2943 | /* IRQ Line */ | |
2944 | rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_INTERRUPT_LINE, IRQ); | |
2945 | } | |
2946 | ||
2947 | if (!behind_bridge) { | |
2948 | rc = cpqhp_set_irq(func->bus, func->device, temp_byte + 0x09, IRQ); | |
2949 | if (rc) | |
2950 | return 1; | |
2951 | } else { | |
2952 | /* TBD - this code may also belong in the other clause | |
2953 | * of this If statement */ | |
2954 | resources->irqs->interrupt[(temp_byte + resources->irqs->barber_pole - 1) & 0x03] = IRQ; | |
2955 | resources->irqs->valid_INT |= 0x01 << (temp_byte + resources->irqs->barber_pole - 1) & 0x03; | |
2956 | } | |
2957 | ||
2958 | /* Latency Timer */ | |
2959 | temp_byte = 0x40; | |
2960 | rc = pci_bus_write_config_byte(pci_bus, devfn, | |
2961 | PCI_LATENCY_TIMER, temp_byte); | |
2962 | ||
2963 | /* Cache Line size */ | |
2964 | temp_byte = 0x08; | |
2965 | rc = pci_bus_write_config_byte(pci_bus, devfn, | |
2966 | PCI_CACHE_LINE_SIZE, temp_byte); | |
2967 | ||
2968 | /* disable ROM base Address */ | |
2969 | temp_dword = 0x00L; | |
2970 | rc = pci_bus_write_config_word(pci_bus, devfn, | |
2971 | PCI_ROM_ADDRESS, temp_dword); | |
2972 | ||
2973 | /* enable card */ | |
2974 | temp_word = 0x0157; /* = PCI_COMMAND_IO | | |
2975 | * PCI_COMMAND_MEMORY | | |
2976 | * PCI_COMMAND_MASTER | | |
2977 | * PCI_COMMAND_INVALIDATE | | |
2978 | * PCI_COMMAND_PARITY | | |
2979 | * PCI_COMMAND_SERR */ | |
2980 | rc = pci_bus_write_config_word (pci_bus, devfn, | |
2981 | PCI_COMMAND, temp_word); | |
2982 | } else { /* End of Not-A-Bridge else */ | |
2983 | /* It's some strange type of PCI adapter (Cardbus?) */ | |
2984 | return DEVICE_TYPE_NOT_SUPPORTED; | |
2985 | } | |
2986 | ||
2987 | func->configured = 1; | |
2988 | ||
2989 | return 0; | |
2990 | free_and_out: | |
2991 | cpqhp_destroy_resource_list (&temp_resources); | |
2992 | ||
2993 | return_resource(&(resources-> bus_head), hold_bus_node); | |
2994 | return_resource(&(resources-> io_head), hold_IO_node); | |
2995 | return_resource(&(resources-> mem_head), hold_mem_node); | |
2996 | return_resource(&(resources-> p_mem_head), hold_p_mem_node); | |
2997 | return rc; | |
2998 | } |