Loading...
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * IBM Hot Plug Controller Driver
4 *
5 * Written By: Tong Yu, IBM Corporation
6 *
7 * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
8 * Copyright (C) 2001-2003 IBM Corp.
9 *
10 * All rights reserved.
11 *
12 * Send feedback to <gregkh@us.ibm.com>
13 *
14 */
15
16#include <linux/module.h>
17#include <linux/errno.h>
18#include <linux/mm.h>
19#include <linux/slab.h>
20#include <linux/pci.h>
21#include <linux/list.h>
22#include <linux/init.h>
23#include "ibmphp.h"
24
25/*
26 * POST builds data blocks(in this data block definition, a char-1
27 * byte, short(or word)-2 byte, long(dword)-4 byte) in the Extended
28 * BIOS Data Area which describe the configuration of the hot-plug
29 * controllers and resources used by the PCI Hot-Plug devices.
30 *
31 * This file walks EBDA, maps data block from physical addr,
32 * reconstruct linked lists about all system resource(MEM, PFM, IO)
33 * already assigned by POST, as well as linked lists about hot plug
34 * controllers (ctlr#, slot#, bus&slot features...)
35 */
36
37/* Global lists */
38LIST_HEAD(ibmphp_ebda_pci_rsrc_head);
39LIST_HEAD(ibmphp_slot_head);
40
41/* Local variables */
42static struct ebda_hpc_list *hpc_list_ptr;
43static struct ebda_rsrc_list *rsrc_list_ptr;
44static struct rio_table_hdr *rio_table_ptr = NULL;
45static LIST_HEAD(ebda_hpc_head);
46static LIST_HEAD(bus_info_head);
47static LIST_HEAD(rio_vg_head);
48static LIST_HEAD(rio_lo_head);
49static LIST_HEAD(opt_vg_head);
50static LIST_HEAD(opt_lo_head);
51static void __iomem *io_mem;
52
53/* Local functions */
54static int ebda_rsrc_controller(void);
55static int ebda_rsrc_rsrc(void);
56static int ebda_rio_table(void);
57
58static struct ebda_hpc_list * __init alloc_ebda_hpc_list(void)
59{
60 return kzalloc(sizeof(struct ebda_hpc_list), GFP_KERNEL);
61}
62
63static struct controller *alloc_ebda_hpc(u32 slot_count, u32 bus_count)
64{
65 struct controller *controller;
66 struct ebda_hpc_slot *slots;
67 struct ebda_hpc_bus *buses;
68
69 controller = kzalloc(sizeof(struct controller), GFP_KERNEL);
70 if (!controller)
71 goto error;
72
73 slots = kcalloc(slot_count, sizeof(struct ebda_hpc_slot), GFP_KERNEL);
74 if (!slots)
75 goto error_contr;
76 controller->slots = slots;
77
78 buses = kcalloc(bus_count, sizeof(struct ebda_hpc_bus), GFP_KERNEL);
79 if (!buses)
80 goto error_slots;
81 controller->buses = buses;
82
83 return controller;
84error_slots:
85 kfree(controller->slots);
86error_contr:
87 kfree(controller);
88error:
89 return NULL;
90}
91
92static void free_ebda_hpc(struct controller *controller)
93{
94 kfree(controller->slots);
95 kfree(controller->buses);
96 kfree(controller);
97}
98
99static struct ebda_rsrc_list * __init alloc_ebda_rsrc_list(void)
100{
101 return kzalloc(sizeof(struct ebda_rsrc_list), GFP_KERNEL);
102}
103
104static struct ebda_pci_rsrc *alloc_ebda_pci_rsrc(void)
105{
106 return kzalloc(sizeof(struct ebda_pci_rsrc), GFP_KERNEL);
107}
108
109static void __init print_bus_info(void)
110{
111 struct bus_info *ptr;
112
113 list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
114 debug("%s - slot_min = %x\n", __func__, ptr->slot_min);
115 debug("%s - slot_max = %x\n", __func__, ptr->slot_max);
116 debug("%s - slot_count = %x\n", __func__, ptr->slot_count);
117 debug("%s - bus# = %x\n", __func__, ptr->busno);
118 debug("%s - current_speed = %x\n", __func__, ptr->current_speed);
119 debug("%s - controller_id = %x\n", __func__, ptr->controller_id);
120
121 debug("%s - slots_at_33_conv = %x\n", __func__, ptr->slots_at_33_conv);
122 debug("%s - slots_at_66_conv = %x\n", __func__, ptr->slots_at_66_conv);
123 debug("%s - slots_at_66_pcix = %x\n", __func__, ptr->slots_at_66_pcix);
124 debug("%s - slots_at_100_pcix = %x\n", __func__, ptr->slots_at_100_pcix);
125 debug("%s - slots_at_133_pcix = %x\n", __func__, ptr->slots_at_133_pcix);
126
127 }
128}
129
130static void print_lo_info(void)
131{
132 struct rio_detail *ptr;
133 debug("print_lo_info ----\n");
134 list_for_each_entry(ptr, &rio_lo_head, rio_detail_list) {
135 debug("%s - rio_node_id = %x\n", __func__, ptr->rio_node_id);
136 debug("%s - rio_type = %x\n", __func__, ptr->rio_type);
137 debug("%s - owner_id = %x\n", __func__, ptr->owner_id);
138 debug("%s - first_slot_num = %x\n", __func__, ptr->first_slot_num);
139 debug("%s - wpindex = %x\n", __func__, ptr->wpindex);
140 debug("%s - chassis_num = %x\n", __func__, ptr->chassis_num);
141
142 }
143}
144
145static void print_vg_info(void)
146{
147 struct rio_detail *ptr;
148 debug("%s ---\n", __func__);
149 list_for_each_entry(ptr, &rio_vg_head, rio_detail_list) {
150 debug("%s - rio_node_id = %x\n", __func__, ptr->rio_node_id);
151 debug("%s - rio_type = %x\n", __func__, ptr->rio_type);
152 debug("%s - owner_id = %x\n", __func__, ptr->owner_id);
153 debug("%s - first_slot_num = %x\n", __func__, ptr->first_slot_num);
154 debug("%s - wpindex = %x\n", __func__, ptr->wpindex);
155 debug("%s - chassis_num = %x\n", __func__, ptr->chassis_num);
156
157 }
158}
159
160static void __init print_ebda_pci_rsrc(void)
161{
162 struct ebda_pci_rsrc *ptr;
163
164 list_for_each_entry(ptr, &ibmphp_ebda_pci_rsrc_head, ebda_pci_rsrc_list) {
165 debug("%s - rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
166 __func__, ptr->rsrc_type, ptr->bus_num, ptr->dev_fun, ptr->start_addr, ptr->end_addr);
167 }
168}
169
170static void __init print_ibm_slot(void)
171{
172 struct slot *ptr;
173
174 list_for_each_entry(ptr, &ibmphp_slot_head, ibm_slot_list) {
175 debug("%s - slot_number: %x\n", __func__, ptr->number);
176 }
177}
178
179static void __init print_opt_vg(void)
180{
181 struct opt_rio *ptr;
182 debug("%s ---\n", __func__);
183 list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) {
184 debug("%s - rio_type %x\n", __func__, ptr->rio_type);
185 debug("%s - chassis_num: %x\n", __func__, ptr->chassis_num);
186 debug("%s - first_slot_num: %x\n", __func__, ptr->first_slot_num);
187 debug("%s - middle_num: %x\n", __func__, ptr->middle_num);
188 }
189}
190
191static void __init print_ebda_hpc(void)
192{
193 struct controller *hpc_ptr;
194 u16 index;
195
196 list_for_each_entry(hpc_ptr, &ebda_hpc_head, ebda_hpc_list) {
197 for (index = 0; index < hpc_ptr->slot_count; index++) {
198 debug("%s - physical slot#: %x\n", __func__, hpc_ptr->slots[index].slot_num);
199 debug("%s - pci bus# of the slot: %x\n", __func__, hpc_ptr->slots[index].slot_bus_num);
200 debug("%s - index into ctlr addr: %x\n", __func__, hpc_ptr->slots[index].ctl_index);
201 debug("%s - cap of the slot: %x\n", __func__, hpc_ptr->slots[index].slot_cap);
202 }
203
204 for (index = 0; index < hpc_ptr->bus_count; index++)
205 debug("%s - bus# of each bus controlled by this ctlr: %x\n", __func__, hpc_ptr->buses[index].bus_num);
206
207 debug("%s - type of hpc: %x\n", __func__, hpc_ptr->ctlr_type);
208 switch (hpc_ptr->ctlr_type) {
209 case 1:
210 debug("%s - bus: %x\n", __func__, hpc_ptr->u.pci_ctlr.bus);
211 debug("%s - dev_fun: %x\n", __func__, hpc_ptr->u.pci_ctlr.dev_fun);
212 debug("%s - irq: %x\n", __func__, hpc_ptr->irq);
213 break;
214
215 case 0:
216 debug("%s - io_start: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_start);
217 debug("%s - io_end: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_end);
218 debug("%s - irq: %x\n", __func__, hpc_ptr->irq);
219 break;
220
221 case 2:
222 case 4:
223 debug("%s - wpegbbar: %lx\n", __func__, hpc_ptr->u.wpeg_ctlr.wpegbbar);
224 debug("%s - i2c_addr: %x\n", __func__, hpc_ptr->u.wpeg_ctlr.i2c_addr);
225 debug("%s - irq: %x\n", __func__, hpc_ptr->irq);
226 break;
227 }
228 }
229}
230
231int __init ibmphp_access_ebda(void)
232{
233 u8 format, num_ctlrs, rio_complete, hs_complete, ebda_sz;
234 u16 ebda_seg, num_entries, next_offset, offset, blk_id, sub_addr, re, rc_id, re_id, base;
235 int rc = 0;
236
237
238 rio_complete = 0;
239 hs_complete = 0;
240
241 io_mem = ioremap((0x40 << 4) + 0x0e, 2);
242 if (!io_mem)
243 return -ENOMEM;
244 ebda_seg = readw(io_mem);
245 iounmap(io_mem);
246 debug("returned ebda segment: %x\n", ebda_seg);
247
248 io_mem = ioremap(ebda_seg<<4, 1);
249 if (!io_mem)
250 return -ENOMEM;
251 ebda_sz = readb(io_mem);
252 iounmap(io_mem);
253 debug("ebda size: %d(KiB)\n", ebda_sz);
254 if (ebda_sz == 0)
255 return -ENOMEM;
256
257 io_mem = ioremap(ebda_seg<<4, (ebda_sz * 1024));
258 if (!io_mem)
259 return -ENOMEM;
260 next_offset = 0x180;
261
262 for (;;) {
263 offset = next_offset;
264
265 /* Make sure what we read is still in the mapped section */
266 if (WARN(offset > (ebda_sz * 1024 - 4),
267 "ibmphp_ebda: next read is beyond ebda_sz\n"))
268 break;
269
270 next_offset = readw(io_mem + offset); /* offset of next blk */
271
272 offset += 2;
273 if (next_offset == 0) /* 0 indicate it's last blk */
274 break;
275 blk_id = readw(io_mem + offset); /* this blk id */
276
277 offset += 2;
278 /* check if it is hot swap block or rio block */
279 if (blk_id != 0x4853 && blk_id != 0x4752)
280 continue;
281 /* found hs table */
282 if (blk_id == 0x4853) {
283 debug("now enter hot swap block---\n");
284 debug("hot blk id: %x\n", blk_id);
285 format = readb(io_mem + offset);
286
287 offset += 1;
288 if (format != 4)
289 goto error_nodev;
290 debug("hot blk format: %x\n", format);
291 /* hot swap sub blk */
292 base = offset;
293
294 sub_addr = base;
295 re = readw(io_mem + sub_addr); /* next sub blk */
296
297 sub_addr += 2;
298 rc_id = readw(io_mem + sub_addr); /* sub blk id */
299
300 sub_addr += 2;
301 if (rc_id != 0x5243)
302 goto error_nodev;
303 /* rc sub blk signature */
304 num_ctlrs = readb(io_mem + sub_addr);
305
306 sub_addr += 1;
307 hpc_list_ptr = alloc_ebda_hpc_list();
308 if (!hpc_list_ptr) {
309 rc = -ENOMEM;
310 goto out;
311 }
312 hpc_list_ptr->format = format;
313 hpc_list_ptr->num_ctlrs = num_ctlrs;
314 hpc_list_ptr->phys_addr = sub_addr; /* offset of RSRC_CONTROLLER blk */
315 debug("info about hpc descriptor---\n");
316 debug("hot blk format: %x\n", format);
317 debug("num of controller: %x\n", num_ctlrs);
318 debug("offset of hpc data structure entries: %x\n ", sub_addr);
319
320 sub_addr = base + re; /* re sub blk */
321 /* FIXME: rc is never used/checked */
322 rc = readw(io_mem + sub_addr); /* next sub blk */
323
324 sub_addr += 2;
325 re_id = readw(io_mem + sub_addr); /* sub blk id */
326
327 sub_addr += 2;
328 if (re_id != 0x5245)
329 goto error_nodev;
330
331 /* signature of re */
332 num_entries = readw(io_mem + sub_addr);
333
334 sub_addr += 2; /* offset of RSRC_ENTRIES blk */
335 rsrc_list_ptr = alloc_ebda_rsrc_list();
336 if (!rsrc_list_ptr) {
337 rc = -ENOMEM;
338 goto out;
339 }
340 rsrc_list_ptr->format = format;
341 rsrc_list_ptr->num_entries = num_entries;
342 rsrc_list_ptr->phys_addr = sub_addr;
343
344 debug("info about rsrc descriptor---\n");
345 debug("format: %x\n", format);
346 debug("num of rsrc: %x\n", num_entries);
347 debug("offset of rsrc data structure entries: %x\n ", sub_addr);
348
349 hs_complete = 1;
350 } else {
351 /* found rio table, blk_id == 0x4752 */
352 debug("now enter io table ---\n");
353 debug("rio blk id: %x\n", blk_id);
354
355 rio_table_ptr = kzalloc(sizeof(struct rio_table_hdr), GFP_KERNEL);
356 if (!rio_table_ptr) {
357 rc = -ENOMEM;
358 goto out;
359 }
360 rio_table_ptr->ver_num = readb(io_mem + offset);
361 rio_table_ptr->scal_count = readb(io_mem + offset + 1);
362 rio_table_ptr->riodev_count = readb(io_mem + offset + 2);
363 rio_table_ptr->offset = offset + 3 ;
364
365 debug("info about rio table hdr ---\n");
366 debug("ver_num: %x\nscal_count: %x\nriodev_count: %x\noffset of rio table: %x\n ",
367 rio_table_ptr->ver_num, rio_table_ptr->scal_count,
368 rio_table_ptr->riodev_count, rio_table_ptr->offset);
369
370 rio_complete = 1;
371 }
372 }
373
374 if (!hs_complete && !rio_complete)
375 goto error_nodev;
376
377 if (rio_table_ptr) {
378 if (rio_complete && rio_table_ptr->ver_num == 3) {
379 rc = ebda_rio_table();
380 if (rc)
381 goto out;
382 }
383 }
384 rc = ebda_rsrc_controller();
385 if (rc)
386 goto out;
387
388 rc = ebda_rsrc_rsrc();
389 goto out;
390error_nodev:
391 rc = -ENODEV;
392out:
393 iounmap(io_mem);
394 return rc;
395}
396
397/*
398 * map info of scalability details and rio details from physical address
399 */
400static int __init ebda_rio_table(void)
401{
402 u16 offset;
403 u8 i;
404 struct rio_detail *rio_detail_ptr;
405
406 offset = rio_table_ptr->offset;
407 offset += 12 * rio_table_ptr->scal_count;
408
409 // we do concern about rio details
410 for (i = 0; i < rio_table_ptr->riodev_count; i++) {
411 rio_detail_ptr = kzalloc(sizeof(struct rio_detail), GFP_KERNEL);
412 if (!rio_detail_ptr)
413 return -ENOMEM;
414 rio_detail_ptr->rio_node_id = readb(io_mem + offset);
415 rio_detail_ptr->bbar = readl(io_mem + offset + 1);
416 rio_detail_ptr->rio_type = readb(io_mem + offset + 5);
417 rio_detail_ptr->owner_id = readb(io_mem + offset + 6);
418 rio_detail_ptr->port0_node_connect = readb(io_mem + offset + 7);
419 rio_detail_ptr->port0_port_connect = readb(io_mem + offset + 8);
420 rio_detail_ptr->port1_node_connect = readb(io_mem + offset + 9);
421 rio_detail_ptr->port1_port_connect = readb(io_mem + offset + 10);
422 rio_detail_ptr->first_slot_num = readb(io_mem + offset + 11);
423 rio_detail_ptr->status = readb(io_mem + offset + 12);
424 rio_detail_ptr->wpindex = readb(io_mem + offset + 13);
425 rio_detail_ptr->chassis_num = readb(io_mem + offset + 14);
426// debug("rio_node_id: %x\nbbar: %x\nrio_type: %x\nowner_id: %x\nport0_node: %x\nport0_port: %x\nport1_node: %x\nport1_port: %x\nfirst_slot_num: %x\nstatus: %x\n", rio_detail_ptr->rio_node_id, rio_detail_ptr->bbar, rio_detail_ptr->rio_type, rio_detail_ptr->owner_id, rio_detail_ptr->port0_node_connect, rio_detail_ptr->port0_port_connect, rio_detail_ptr->port1_node_connect, rio_detail_ptr->port1_port_connect, rio_detail_ptr->first_slot_num, rio_detail_ptr->status);
427 //create linked list of chassis
428 if (rio_detail_ptr->rio_type == 4 || rio_detail_ptr->rio_type == 5)
429 list_add(&rio_detail_ptr->rio_detail_list, &rio_vg_head);
430 //create linked list of expansion box
431 else if (rio_detail_ptr->rio_type == 6 || rio_detail_ptr->rio_type == 7)
432 list_add(&rio_detail_ptr->rio_detail_list, &rio_lo_head);
433 else
434 // not in my concern
435 kfree(rio_detail_ptr);
436 offset += 15;
437 }
438 print_lo_info();
439 print_vg_info();
440 return 0;
441}
442
443/*
444 * reorganizing linked list of chassis
445 */
446static struct opt_rio *search_opt_vg(u8 chassis_num)
447{
448 struct opt_rio *ptr;
449 list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) {
450 if (ptr->chassis_num == chassis_num)
451 return ptr;
452 }
453 return NULL;
454}
455
456static int __init combine_wpg_for_chassis(void)
457{
458 struct opt_rio *opt_rio_ptr = NULL;
459 struct rio_detail *rio_detail_ptr = NULL;
460
461 list_for_each_entry(rio_detail_ptr, &rio_vg_head, rio_detail_list) {
462 opt_rio_ptr = search_opt_vg(rio_detail_ptr->chassis_num);
463 if (!opt_rio_ptr) {
464 opt_rio_ptr = kzalloc(sizeof(struct opt_rio), GFP_KERNEL);
465 if (!opt_rio_ptr)
466 return -ENOMEM;
467 opt_rio_ptr->rio_type = rio_detail_ptr->rio_type;
468 opt_rio_ptr->chassis_num = rio_detail_ptr->chassis_num;
469 opt_rio_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
470 opt_rio_ptr->middle_num = rio_detail_ptr->first_slot_num;
471 list_add(&opt_rio_ptr->opt_rio_list, &opt_vg_head);
472 } else {
473 opt_rio_ptr->first_slot_num = min(opt_rio_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
474 opt_rio_ptr->middle_num = max(opt_rio_ptr->middle_num, rio_detail_ptr->first_slot_num);
475 }
476 }
477 print_opt_vg();
478 return 0;
479}
480
481/*
482 * reorganizing linked list of expansion box
483 */
484static struct opt_rio_lo *search_opt_lo(u8 chassis_num)
485{
486 struct opt_rio_lo *ptr;
487 list_for_each_entry(ptr, &opt_lo_head, opt_rio_lo_list) {
488 if (ptr->chassis_num == chassis_num)
489 return ptr;
490 }
491 return NULL;
492}
493
494static int combine_wpg_for_expansion(void)
495{
496 struct opt_rio_lo *opt_rio_lo_ptr = NULL;
497 struct rio_detail *rio_detail_ptr = NULL;
498
499 list_for_each_entry(rio_detail_ptr, &rio_lo_head, rio_detail_list) {
500 opt_rio_lo_ptr = search_opt_lo(rio_detail_ptr->chassis_num);
501 if (!opt_rio_lo_ptr) {
502 opt_rio_lo_ptr = kzalloc(sizeof(struct opt_rio_lo), GFP_KERNEL);
503 if (!opt_rio_lo_ptr)
504 return -ENOMEM;
505 opt_rio_lo_ptr->rio_type = rio_detail_ptr->rio_type;
506 opt_rio_lo_ptr->chassis_num = rio_detail_ptr->chassis_num;
507 opt_rio_lo_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
508 opt_rio_lo_ptr->middle_num = rio_detail_ptr->first_slot_num;
509 opt_rio_lo_ptr->pack_count = 1;
510
511 list_add(&opt_rio_lo_ptr->opt_rio_lo_list, &opt_lo_head);
512 } else {
513 opt_rio_lo_ptr->first_slot_num = min(opt_rio_lo_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
514 opt_rio_lo_ptr->middle_num = max(opt_rio_lo_ptr->middle_num, rio_detail_ptr->first_slot_num);
515 opt_rio_lo_ptr->pack_count = 2;
516 }
517 }
518 return 0;
519}
520
521
522/* Since we don't know the max slot number per each chassis, hence go
523 * through the list of all chassis to find out the range
524 * Arguments: slot_num, 1st slot number of the chassis we think we are on,
525 * var (0 = chassis, 1 = expansion box)
526 */
527static int first_slot_num(u8 slot_num, u8 first_slot, u8 var)
528{
529 struct opt_rio *opt_vg_ptr = NULL;
530 struct opt_rio_lo *opt_lo_ptr = NULL;
531 int rc = 0;
532
533 if (!var) {
534 list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) {
535 if ((first_slot < opt_vg_ptr->first_slot_num) && (slot_num >= opt_vg_ptr->first_slot_num)) {
536 rc = -ENODEV;
537 break;
538 }
539 }
540 } else {
541 list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) {
542 if ((first_slot < opt_lo_ptr->first_slot_num) && (slot_num >= opt_lo_ptr->first_slot_num)) {
543 rc = -ENODEV;
544 break;
545 }
546 }
547 }
548 return rc;
549}
550
551static struct opt_rio_lo *find_rxe_num(u8 slot_num)
552{
553 struct opt_rio_lo *opt_lo_ptr;
554
555 list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) {
556 //check to see if this slot_num belongs to expansion box
557 if ((slot_num >= opt_lo_ptr->first_slot_num) && (!first_slot_num(slot_num, opt_lo_ptr->first_slot_num, 1)))
558 return opt_lo_ptr;
559 }
560 return NULL;
561}
562
563static struct opt_rio *find_chassis_num(u8 slot_num)
564{
565 struct opt_rio *opt_vg_ptr;
566
567 list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) {
568 //check to see if this slot_num belongs to chassis
569 if ((slot_num >= opt_vg_ptr->first_slot_num) && (!first_slot_num(slot_num, opt_vg_ptr->first_slot_num, 0)))
570 return opt_vg_ptr;
571 }
572 return NULL;
573}
574
575/* This routine will find out how many slots are in the chassis, so that
576 * the slot numbers for rxe100 would start from 1, and not from 7, or 6 etc
577 */
578static u8 calculate_first_slot(u8 slot_num)
579{
580 u8 first_slot = 1;
581 struct slot *slot_cur;
582
583 list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
584 if (slot_cur->ctrl) {
585 if ((slot_cur->ctrl->ctlr_type != 4) && (slot_cur->ctrl->ending_slot_num > first_slot) && (slot_num > slot_cur->ctrl->ending_slot_num))
586 first_slot = slot_cur->ctrl->ending_slot_num;
587 }
588 }
589 return first_slot + 1;
590
591}
592
593#define SLOT_NAME_SIZE 30
594
595static char *create_file_name(struct slot *slot_cur)
596{
597 struct opt_rio *opt_vg_ptr = NULL;
598 struct opt_rio_lo *opt_lo_ptr = NULL;
599 static char str[SLOT_NAME_SIZE];
600 int which = 0; /* rxe = 1, chassis = 0 */
601 u8 number = 1; /* either chassis or rxe # */
602 u8 first_slot = 1;
603 u8 slot_num;
604 u8 flag = 0;
605
606 if (!slot_cur) {
607 err("Structure passed is empty\n");
608 return NULL;
609 }
610
611 slot_num = slot_cur->number;
612
613 memset(str, 0, sizeof(str));
614
615 if (rio_table_ptr) {
616 if (rio_table_ptr->ver_num == 3) {
617 opt_vg_ptr = find_chassis_num(slot_num);
618 opt_lo_ptr = find_rxe_num(slot_num);
619 }
620 }
621 if (opt_vg_ptr) {
622 if (opt_lo_ptr) {
623 if ((slot_num - opt_vg_ptr->first_slot_num) > (slot_num - opt_lo_ptr->first_slot_num)) {
624 number = opt_lo_ptr->chassis_num;
625 first_slot = opt_lo_ptr->first_slot_num;
626 which = 1; /* it is RXE */
627 } else {
628 first_slot = opt_vg_ptr->first_slot_num;
629 number = opt_vg_ptr->chassis_num;
630 which = 0;
631 }
632 } else {
633 first_slot = opt_vg_ptr->first_slot_num;
634 number = opt_vg_ptr->chassis_num;
635 which = 0;
636 }
637 ++flag;
638 } else if (opt_lo_ptr) {
639 number = opt_lo_ptr->chassis_num;
640 first_slot = opt_lo_ptr->first_slot_num;
641 which = 1;
642 ++flag;
643 } else if (rio_table_ptr) {
644 if (rio_table_ptr->ver_num == 3) {
645 /* if both NULL and we DO have correct RIO table in BIOS */
646 return NULL;
647 }
648 }
649 if (!flag) {
650 if (slot_cur->ctrl->ctlr_type == 4) {
651 first_slot = calculate_first_slot(slot_num);
652 which = 1;
653 } else {
654 which = 0;
655 }
656 }
657
658 sprintf(str, "%s%dslot%d",
659 which == 0 ? "chassis" : "rxe",
660 number, slot_num - first_slot + 1);
661 return str;
662}
663
664static int fillslotinfo(struct hotplug_slot *hotplug_slot)
665{
666 struct slot *slot;
667 int rc = 0;
668
669 if (!hotplug_slot || !hotplug_slot->private)
670 return -EINVAL;
671
672 slot = hotplug_slot->private;
673 rc = ibmphp_hpc_readslot(slot, READ_ALLSTAT, NULL);
674 if (rc)
675 return rc;
676
677 // power - enabled:1 not:0
678 hotplug_slot->info->power_status = SLOT_POWER(slot->status);
679
680 // attention - off:0, on:1, blinking:2
681 hotplug_slot->info->attention_status = SLOT_ATTN(slot->status, slot->ext_status);
682
683 // latch - open:1 closed:0
684 hotplug_slot->info->latch_status = SLOT_LATCH(slot->status);
685
686 // pci board - present:1 not:0
687 if (SLOT_PRESENT(slot->status))
688 hotplug_slot->info->adapter_status = 1;
689 else
690 hotplug_slot->info->adapter_status = 0;
691/*
692 if (slot->bus_on->supported_bus_mode
693 && (slot->bus_on->supported_speed == BUS_SPEED_66))
694 hotplug_slot->info->max_bus_speed_status = BUS_SPEED_66PCIX;
695 else
696 hotplug_slot->info->max_bus_speed_status = slot->bus_on->supported_speed;
697*/
698
699 return rc;
700}
701
702static void release_slot(struct hotplug_slot *hotplug_slot)
703{
704 struct slot *slot;
705
706 if (!hotplug_slot || !hotplug_slot->private)
707 return;
708
709 slot = hotplug_slot->private;
710 kfree(slot->hotplug_slot->info);
711 kfree(slot->hotplug_slot);
712 slot->ctrl = NULL;
713 slot->bus_on = NULL;
714
715 /* we don't want to actually remove the resources, since free_resources will do just that */
716 ibmphp_unconfigure_card(&slot, -1);
717
718 kfree(slot);
719}
720
721static struct pci_driver ibmphp_driver;
722
723/*
724 * map info (ctlr-id, slot count, slot#.. bus count, bus#, ctlr type...) of
725 * each hpc from physical address to a list of hot plug controllers based on
726 * hpc descriptors.
727 */
728static int __init ebda_rsrc_controller(void)
729{
730 u16 addr, addr_slot, addr_bus;
731 u8 ctlr_id, temp, bus_index;
732 u16 ctlr, slot, bus;
733 u16 slot_num, bus_num, index;
734 struct hotplug_slot *hp_slot_ptr;
735 struct controller *hpc_ptr;
736 struct ebda_hpc_bus *bus_ptr;
737 struct ebda_hpc_slot *slot_ptr;
738 struct bus_info *bus_info_ptr1, *bus_info_ptr2;
739 int rc;
740 struct slot *tmp_slot;
741 char name[SLOT_NAME_SIZE];
742
743 addr = hpc_list_ptr->phys_addr;
744 for (ctlr = 0; ctlr < hpc_list_ptr->num_ctlrs; ctlr++) {
745 bus_index = 1;
746 ctlr_id = readb(io_mem + addr);
747 addr += 1;
748 slot_num = readb(io_mem + addr);
749
750 addr += 1;
751 addr_slot = addr; /* offset of slot structure */
752 addr += (slot_num * 4);
753
754 bus_num = readb(io_mem + addr);
755
756 addr += 1;
757 addr_bus = addr; /* offset of bus */
758 addr += (bus_num * 9); /* offset of ctlr_type */
759 temp = readb(io_mem + addr);
760
761 addr += 1;
762 /* init hpc structure */
763 hpc_ptr = alloc_ebda_hpc(slot_num, bus_num);
764 if (!hpc_ptr) {
765 rc = -ENOMEM;
766 goto error_no_hpc;
767 }
768 hpc_ptr->ctlr_id = ctlr_id;
769 hpc_ptr->ctlr_relative_id = ctlr;
770 hpc_ptr->slot_count = slot_num;
771 hpc_ptr->bus_count = bus_num;
772 debug("now enter ctlr data structure ---\n");
773 debug("ctlr id: %x\n", ctlr_id);
774 debug("ctlr_relative_id: %x\n", hpc_ptr->ctlr_relative_id);
775 debug("count of slots controlled by this ctlr: %x\n", slot_num);
776 debug("count of buses controlled by this ctlr: %x\n", bus_num);
777
778 /* init slot structure, fetch slot, bus, cap... */
779 slot_ptr = hpc_ptr->slots;
780 for (slot = 0; slot < slot_num; slot++) {
781 slot_ptr->slot_num = readb(io_mem + addr_slot);
782 slot_ptr->slot_bus_num = readb(io_mem + addr_slot + slot_num);
783 slot_ptr->ctl_index = readb(io_mem + addr_slot + 2*slot_num);
784 slot_ptr->slot_cap = readb(io_mem + addr_slot + 3*slot_num);
785
786 // create bus_info lined list --- if only one slot per bus: slot_min = slot_max
787
788 bus_info_ptr2 = ibmphp_find_same_bus_num(slot_ptr->slot_bus_num);
789 if (!bus_info_ptr2) {
790 bus_info_ptr1 = kzalloc(sizeof(struct bus_info), GFP_KERNEL);
791 if (!bus_info_ptr1) {
792 rc = -ENOMEM;
793 goto error_no_hp_slot;
794 }
795 bus_info_ptr1->slot_min = slot_ptr->slot_num;
796 bus_info_ptr1->slot_max = slot_ptr->slot_num;
797 bus_info_ptr1->slot_count += 1;
798 bus_info_ptr1->busno = slot_ptr->slot_bus_num;
799 bus_info_ptr1->index = bus_index++;
800 bus_info_ptr1->current_speed = 0xff;
801 bus_info_ptr1->current_bus_mode = 0xff;
802
803 bus_info_ptr1->controller_id = hpc_ptr->ctlr_id;
804
805 list_add_tail(&bus_info_ptr1->bus_info_list, &bus_info_head);
806
807 } else {
808 bus_info_ptr2->slot_min = min(bus_info_ptr2->slot_min, slot_ptr->slot_num);
809 bus_info_ptr2->slot_max = max(bus_info_ptr2->slot_max, slot_ptr->slot_num);
810 bus_info_ptr2->slot_count += 1;
811
812 }
813
814 // end of creating the bus_info linked list
815
816 slot_ptr++;
817 addr_slot += 1;
818 }
819
820 /* init bus structure */
821 bus_ptr = hpc_ptr->buses;
822 for (bus = 0; bus < bus_num; bus++) {
823 bus_ptr->bus_num = readb(io_mem + addr_bus + bus);
824 bus_ptr->slots_at_33_conv = readb(io_mem + addr_bus + bus_num + 8 * bus);
825 bus_ptr->slots_at_66_conv = readb(io_mem + addr_bus + bus_num + 8 * bus + 1);
826
827 bus_ptr->slots_at_66_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 2);
828
829 bus_ptr->slots_at_100_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 3);
830
831 bus_ptr->slots_at_133_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 4);
832
833 bus_info_ptr2 = ibmphp_find_same_bus_num(bus_ptr->bus_num);
834 if (bus_info_ptr2) {
835 bus_info_ptr2->slots_at_33_conv = bus_ptr->slots_at_33_conv;
836 bus_info_ptr2->slots_at_66_conv = bus_ptr->slots_at_66_conv;
837 bus_info_ptr2->slots_at_66_pcix = bus_ptr->slots_at_66_pcix;
838 bus_info_ptr2->slots_at_100_pcix = bus_ptr->slots_at_100_pcix;
839 bus_info_ptr2->slots_at_133_pcix = bus_ptr->slots_at_133_pcix;
840 }
841 bus_ptr++;
842 }
843
844 hpc_ptr->ctlr_type = temp;
845
846 switch (hpc_ptr->ctlr_type) {
847 case 1:
848 hpc_ptr->u.pci_ctlr.bus = readb(io_mem + addr);
849 hpc_ptr->u.pci_ctlr.dev_fun = readb(io_mem + addr + 1);
850 hpc_ptr->irq = readb(io_mem + addr + 2);
851 addr += 3;
852 debug("ctrl bus = %x, ctlr devfun = %x, irq = %x\n",
853 hpc_ptr->u.pci_ctlr.bus,
854 hpc_ptr->u.pci_ctlr.dev_fun, hpc_ptr->irq);
855 break;
856
857 case 0:
858 hpc_ptr->u.isa_ctlr.io_start = readw(io_mem + addr);
859 hpc_ptr->u.isa_ctlr.io_end = readw(io_mem + addr + 2);
860 if (!request_region(hpc_ptr->u.isa_ctlr.io_start,
861 (hpc_ptr->u.isa_ctlr.io_end - hpc_ptr->u.isa_ctlr.io_start + 1),
862 "ibmphp")) {
863 rc = -ENODEV;
864 goto error_no_hp_slot;
865 }
866 hpc_ptr->irq = readb(io_mem + addr + 4);
867 addr += 5;
868 break;
869
870 case 2:
871 case 4:
872 hpc_ptr->u.wpeg_ctlr.wpegbbar = readl(io_mem + addr);
873 hpc_ptr->u.wpeg_ctlr.i2c_addr = readb(io_mem + addr + 4);
874 hpc_ptr->irq = readb(io_mem + addr + 5);
875 addr += 6;
876 break;
877 default:
878 rc = -ENODEV;
879 goto error_no_hp_slot;
880 }
881
882 //reorganize chassis' linked list
883 combine_wpg_for_chassis();
884 combine_wpg_for_expansion();
885 hpc_ptr->revision = 0xff;
886 hpc_ptr->options = 0xff;
887 hpc_ptr->starting_slot_num = hpc_ptr->slots[0].slot_num;
888 hpc_ptr->ending_slot_num = hpc_ptr->slots[slot_num-1].slot_num;
889
890 // register slots with hpc core as well as create linked list of ibm slot
891 for (index = 0; index < hpc_ptr->slot_count; index++) {
892
893 hp_slot_ptr = kzalloc(sizeof(*hp_slot_ptr), GFP_KERNEL);
894 if (!hp_slot_ptr) {
895 rc = -ENOMEM;
896 goto error_no_hp_slot;
897 }
898
899 hp_slot_ptr->info = kzalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
900 if (!hp_slot_ptr->info) {
901 rc = -ENOMEM;
902 goto error_no_hp_info;
903 }
904
905 tmp_slot = kzalloc(sizeof(*tmp_slot), GFP_KERNEL);
906 if (!tmp_slot) {
907 rc = -ENOMEM;
908 goto error_no_slot;
909 }
910
911 tmp_slot->flag = 1;
912
913 tmp_slot->capabilities = hpc_ptr->slots[index].slot_cap;
914 if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_133_MAX) == EBDA_SLOT_133_MAX)
915 tmp_slot->supported_speed = 3;
916 else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_100_MAX) == EBDA_SLOT_100_MAX)
917 tmp_slot->supported_speed = 2;
918 else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_66_MAX) == EBDA_SLOT_66_MAX)
919 tmp_slot->supported_speed = 1;
920
921 if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_PCIX_CAP) == EBDA_SLOT_PCIX_CAP)
922 tmp_slot->supported_bus_mode = 1;
923 else
924 tmp_slot->supported_bus_mode = 0;
925
926
927 tmp_slot->bus = hpc_ptr->slots[index].slot_bus_num;
928
929 bus_info_ptr1 = ibmphp_find_same_bus_num(hpc_ptr->slots[index].slot_bus_num);
930 if (!bus_info_ptr1) {
931 kfree(tmp_slot);
932 rc = -ENODEV;
933 goto error;
934 }
935 tmp_slot->bus_on = bus_info_ptr1;
936 bus_info_ptr1 = NULL;
937 tmp_slot->ctrl = hpc_ptr;
938
939 tmp_slot->ctlr_index = hpc_ptr->slots[index].ctl_index;
940 tmp_slot->number = hpc_ptr->slots[index].slot_num;
941 tmp_slot->hotplug_slot = hp_slot_ptr;
942
943 hp_slot_ptr->private = tmp_slot;
944 hp_slot_ptr->release = release_slot;
945
946 rc = fillslotinfo(hp_slot_ptr);
947 if (rc)
948 goto error;
949
950 rc = ibmphp_init_devno((struct slot **) &hp_slot_ptr->private);
951 if (rc)
952 goto error;
953 hp_slot_ptr->ops = &ibmphp_hotplug_slot_ops;
954
955 // end of registering ibm slot with hotplug core
956
957 list_add(&((struct slot *)(hp_slot_ptr->private))->ibm_slot_list, &ibmphp_slot_head);
958 }
959
960 print_bus_info();
961 list_add(&hpc_ptr->ebda_hpc_list, &ebda_hpc_head);
962
963 } /* each hpc */
964
965 list_for_each_entry(tmp_slot, &ibmphp_slot_head, ibm_slot_list) {
966 snprintf(name, SLOT_NAME_SIZE, "%s", create_file_name(tmp_slot));
967 pci_hp_register(tmp_slot->hotplug_slot,
968 pci_find_bus(0, tmp_slot->bus), tmp_slot->device, name);
969 }
970
971 print_ebda_hpc();
972 print_ibm_slot();
973 return 0;
974
975error:
976 kfree(hp_slot_ptr->private);
977error_no_slot:
978 kfree(hp_slot_ptr->info);
979error_no_hp_info:
980 kfree(hp_slot_ptr);
981error_no_hp_slot:
982 free_ebda_hpc(hpc_ptr);
983error_no_hpc:
984 iounmap(io_mem);
985 return rc;
986}
987
988/*
989 * map info (bus, devfun, start addr, end addr..) of i/o, memory,
990 * pfm from the physical addr to a list of resource.
991 */
992static int __init ebda_rsrc_rsrc(void)
993{
994 u16 addr;
995 short rsrc;
996 u8 type, rsrc_type;
997 struct ebda_pci_rsrc *rsrc_ptr;
998
999 addr = rsrc_list_ptr->phys_addr;
1000 debug("now entering rsrc land\n");
1001 debug("offset of rsrc: %x\n", rsrc_list_ptr->phys_addr);
1002
1003 for (rsrc = 0; rsrc < rsrc_list_ptr->num_entries; rsrc++) {
1004 type = readb(io_mem + addr);
1005
1006 addr += 1;
1007 rsrc_type = type & EBDA_RSRC_TYPE_MASK;
1008
1009 if (rsrc_type == EBDA_IO_RSRC_TYPE) {
1010 rsrc_ptr = alloc_ebda_pci_rsrc();
1011 if (!rsrc_ptr) {
1012 iounmap(io_mem);
1013 return -ENOMEM;
1014 }
1015 rsrc_ptr->rsrc_type = type;
1016
1017 rsrc_ptr->bus_num = readb(io_mem + addr);
1018 rsrc_ptr->dev_fun = readb(io_mem + addr + 1);
1019 rsrc_ptr->start_addr = readw(io_mem + addr + 2);
1020 rsrc_ptr->end_addr = readw(io_mem + addr + 4);
1021 addr += 6;
1022
1023 debug("rsrc from io type ----\n");
1024 debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
1025 rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
1026
1027 list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
1028 }
1029
1030 if (rsrc_type == EBDA_MEM_RSRC_TYPE || rsrc_type == EBDA_PFM_RSRC_TYPE) {
1031 rsrc_ptr = alloc_ebda_pci_rsrc();
1032 if (!rsrc_ptr) {
1033 iounmap(io_mem);
1034 return -ENOMEM;
1035 }
1036 rsrc_ptr->rsrc_type = type;
1037
1038 rsrc_ptr->bus_num = readb(io_mem + addr);
1039 rsrc_ptr->dev_fun = readb(io_mem + addr + 1);
1040 rsrc_ptr->start_addr = readl(io_mem + addr + 2);
1041 rsrc_ptr->end_addr = readl(io_mem + addr + 6);
1042 addr += 10;
1043
1044 debug("rsrc from mem or pfm ---\n");
1045 debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
1046 rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
1047
1048 list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
1049 }
1050 }
1051 kfree(rsrc_list_ptr);
1052 rsrc_list_ptr = NULL;
1053 print_ebda_pci_rsrc();
1054 return 0;
1055}
1056
1057u16 ibmphp_get_total_controllers(void)
1058{
1059 return hpc_list_ptr->num_ctlrs;
1060}
1061
1062struct slot *ibmphp_get_slot_from_physical_num(u8 physical_num)
1063{
1064 struct slot *slot;
1065
1066 list_for_each_entry(slot, &ibmphp_slot_head, ibm_slot_list) {
1067 if (slot->number == physical_num)
1068 return slot;
1069 }
1070 return NULL;
1071}
1072
1073/* To find:
1074 * - the smallest slot number
1075 * - the largest slot number
1076 * - the total number of the slots based on each bus
1077 * (if only one slot per bus slot_min = slot_max )
1078 */
1079struct bus_info *ibmphp_find_same_bus_num(u32 num)
1080{
1081 struct bus_info *ptr;
1082
1083 list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
1084 if (ptr->busno == num)
1085 return ptr;
1086 }
1087 return NULL;
1088}
1089
1090/* Finding relative bus number, in order to map corresponding
1091 * bus register
1092 */
1093int ibmphp_get_bus_index(u8 num)
1094{
1095 struct bus_info *ptr;
1096
1097 list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
1098 if (ptr->busno == num)
1099 return ptr->index;
1100 }
1101 return -ENODEV;
1102}
1103
1104void ibmphp_free_bus_info_queue(void)
1105{
1106 struct bus_info *bus_info, *next;
1107
1108 list_for_each_entry_safe(bus_info, next, &bus_info_head,
1109 bus_info_list) {
1110 kfree (bus_info);
1111 }
1112}
1113
1114void ibmphp_free_ebda_hpc_queue(void)
1115{
1116 struct controller *controller = NULL, *next;
1117 int pci_flag = 0;
1118
1119 list_for_each_entry_safe(controller, next, &ebda_hpc_head,
1120 ebda_hpc_list) {
1121 if (controller->ctlr_type == 0)
1122 release_region(controller->u.isa_ctlr.io_start, (controller->u.isa_ctlr.io_end - controller->u.isa_ctlr.io_start + 1));
1123 else if ((controller->ctlr_type == 1) && (!pci_flag)) {
1124 ++pci_flag;
1125 pci_unregister_driver(&ibmphp_driver);
1126 }
1127 free_ebda_hpc(controller);
1128 }
1129}
1130
1131void ibmphp_free_ebda_pci_rsrc_queue(void)
1132{
1133 struct ebda_pci_rsrc *resource, *next;
1134
1135 list_for_each_entry_safe(resource, next, &ibmphp_ebda_pci_rsrc_head,
1136 ebda_pci_rsrc_list) {
1137 kfree (resource);
1138 resource = NULL;
1139 }
1140}
1141
1142static const struct pci_device_id id_table[] = {
1143 {
1144 .vendor = PCI_VENDOR_ID_IBM,
1145 .device = HPC_DEVICE_ID,
1146 .subvendor = PCI_VENDOR_ID_IBM,
1147 .subdevice = HPC_SUBSYSTEM_ID,
1148 .class = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
1149 }, {}
1150};
1151
1152MODULE_DEVICE_TABLE(pci, id_table);
1153
1154static int ibmphp_probe(struct pci_dev *, const struct pci_device_id *);
1155static struct pci_driver ibmphp_driver = {
1156 .name = "ibmphp",
1157 .id_table = id_table,
1158 .probe = ibmphp_probe,
1159};
1160
1161int ibmphp_register_pci(void)
1162{
1163 struct controller *ctrl;
1164 int rc = 0;
1165
1166 list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
1167 if (ctrl->ctlr_type == 1) {
1168 rc = pci_register_driver(&ibmphp_driver);
1169 break;
1170 }
1171 }
1172 return rc;
1173}
1174static int ibmphp_probe(struct pci_dev *dev, const struct pci_device_id *ids)
1175{
1176 struct controller *ctrl;
1177
1178 debug("inside ibmphp_probe\n");
1179
1180 list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
1181 if (ctrl->ctlr_type == 1) {
1182 if ((dev->devfn == ctrl->u.pci_ctlr.dev_fun) && (dev->bus->number == ctrl->u.pci_ctlr.bus)) {
1183 ctrl->ctrl_dev = dev;
1184 debug("found device!!!\n");
1185 debug("dev->device = %x, dev->subsystem_device = %x\n", dev->device, dev->subsystem_device);
1186 return 0;
1187 }
1188 }
1189 }
1190 return -ENODEV;
1191}
1/*
2 * IBM Hot Plug Controller Driver
3 *
4 * Written By: Tong Yu, IBM Corporation
5 *
6 * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
7 * Copyright (C) 2001-2003 IBM Corp.
8 *
9 * All rights reserved.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or (at
14 * your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
19 * NON INFRINGEMENT. See the GNU General Public License for more
20 * details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 * Send feedback to <gregkh@us.ibm.com>
27 *
28 */
29
30#include <linux/module.h>
31#include <linux/errno.h>
32#include <linux/mm.h>
33#include <linux/slab.h>
34#include <linux/pci.h>
35#include <linux/list.h>
36#include <linux/init.h>
37#include "ibmphp.h"
38
39/*
40 * POST builds data blocks(in this data block definition, a char-1
41 * byte, short(or word)-2 byte, long(dword)-4 byte) in the Extended
42 * BIOS Data Area which describe the configuration of the hot-plug
43 * controllers and resources used by the PCI Hot-Plug devices.
44 *
45 * This file walks EBDA, maps data block from physical addr,
46 * reconstruct linked lists about all system resource(MEM, PFM, IO)
47 * already assigned by POST, as well as linked lists about hot plug
48 * controllers (ctlr#, slot#, bus&slot features...)
49 */
50
51/* Global lists */
52LIST_HEAD(ibmphp_ebda_pci_rsrc_head);
53LIST_HEAD(ibmphp_slot_head);
54
55/* Local variables */
56static struct ebda_hpc_list *hpc_list_ptr;
57static struct ebda_rsrc_list *rsrc_list_ptr;
58static struct rio_table_hdr *rio_table_ptr = NULL;
59static LIST_HEAD(ebda_hpc_head);
60static LIST_HEAD(bus_info_head);
61static LIST_HEAD(rio_vg_head);
62static LIST_HEAD(rio_lo_head);
63static LIST_HEAD(opt_vg_head);
64static LIST_HEAD(opt_lo_head);
65static void __iomem *io_mem;
66
67/* Local functions */
68static int ebda_rsrc_controller(void);
69static int ebda_rsrc_rsrc(void);
70static int ebda_rio_table(void);
71
72static struct ebda_hpc_list * __init alloc_ebda_hpc_list(void)
73{
74 return kzalloc(sizeof(struct ebda_hpc_list), GFP_KERNEL);
75}
76
77static struct controller *alloc_ebda_hpc(u32 slot_count, u32 bus_count)
78{
79 struct controller *controller;
80 struct ebda_hpc_slot *slots;
81 struct ebda_hpc_bus *buses;
82
83 controller = kzalloc(sizeof(struct controller), GFP_KERNEL);
84 if (!controller)
85 goto error;
86
87 slots = kcalloc(slot_count, sizeof(struct ebda_hpc_slot), GFP_KERNEL);
88 if (!slots)
89 goto error_contr;
90 controller->slots = slots;
91
92 buses = kcalloc(bus_count, sizeof(struct ebda_hpc_bus), GFP_KERNEL);
93 if (!buses)
94 goto error_slots;
95 controller->buses = buses;
96
97 return controller;
98error_slots:
99 kfree(controller->slots);
100error_contr:
101 kfree(controller);
102error:
103 return NULL;
104}
105
106static void free_ebda_hpc(struct controller *controller)
107{
108 kfree(controller->slots);
109 kfree(controller->buses);
110 kfree(controller);
111}
112
113static struct ebda_rsrc_list * __init alloc_ebda_rsrc_list(void)
114{
115 return kzalloc(sizeof(struct ebda_rsrc_list), GFP_KERNEL);
116}
117
118static struct ebda_pci_rsrc *alloc_ebda_pci_rsrc(void)
119{
120 return kzalloc(sizeof(struct ebda_pci_rsrc), GFP_KERNEL);
121}
122
123static void __init print_bus_info(void)
124{
125 struct bus_info *ptr;
126
127 list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
128 debug("%s - slot_min = %x\n", __func__, ptr->slot_min);
129 debug("%s - slot_max = %x\n", __func__, ptr->slot_max);
130 debug("%s - slot_count = %x\n", __func__, ptr->slot_count);
131 debug("%s - bus# = %x\n", __func__, ptr->busno);
132 debug("%s - current_speed = %x\n", __func__, ptr->current_speed);
133 debug("%s - controller_id = %x\n", __func__, ptr->controller_id);
134
135 debug("%s - slots_at_33_conv = %x\n", __func__, ptr->slots_at_33_conv);
136 debug("%s - slots_at_66_conv = %x\n", __func__, ptr->slots_at_66_conv);
137 debug("%s - slots_at_66_pcix = %x\n", __func__, ptr->slots_at_66_pcix);
138 debug("%s - slots_at_100_pcix = %x\n", __func__, ptr->slots_at_100_pcix);
139 debug("%s - slots_at_133_pcix = %x\n", __func__, ptr->slots_at_133_pcix);
140
141 }
142}
143
144static void print_lo_info(void)
145{
146 struct rio_detail *ptr;
147 debug("print_lo_info ----\n");
148 list_for_each_entry(ptr, &rio_lo_head, rio_detail_list) {
149 debug("%s - rio_node_id = %x\n", __func__, ptr->rio_node_id);
150 debug("%s - rio_type = %x\n", __func__, ptr->rio_type);
151 debug("%s - owner_id = %x\n", __func__, ptr->owner_id);
152 debug("%s - first_slot_num = %x\n", __func__, ptr->first_slot_num);
153 debug("%s - wpindex = %x\n", __func__, ptr->wpindex);
154 debug("%s - chassis_num = %x\n", __func__, ptr->chassis_num);
155
156 }
157}
158
159static void print_vg_info(void)
160{
161 struct rio_detail *ptr;
162 debug("%s ---\n", __func__);
163 list_for_each_entry(ptr, &rio_vg_head, rio_detail_list) {
164 debug("%s - rio_node_id = %x\n", __func__, ptr->rio_node_id);
165 debug("%s - rio_type = %x\n", __func__, ptr->rio_type);
166 debug("%s - owner_id = %x\n", __func__, ptr->owner_id);
167 debug("%s - first_slot_num = %x\n", __func__, ptr->first_slot_num);
168 debug("%s - wpindex = %x\n", __func__, ptr->wpindex);
169 debug("%s - chassis_num = %x\n", __func__, ptr->chassis_num);
170
171 }
172}
173
174static void __init print_ebda_pci_rsrc(void)
175{
176 struct ebda_pci_rsrc *ptr;
177
178 list_for_each_entry(ptr, &ibmphp_ebda_pci_rsrc_head, ebda_pci_rsrc_list) {
179 debug("%s - rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
180 __func__, ptr->rsrc_type, ptr->bus_num, ptr->dev_fun, ptr->start_addr, ptr->end_addr);
181 }
182}
183
184static void __init print_ibm_slot(void)
185{
186 struct slot *ptr;
187
188 list_for_each_entry(ptr, &ibmphp_slot_head, ibm_slot_list) {
189 debug("%s - slot_number: %x\n", __func__, ptr->number);
190 }
191}
192
193static void __init print_opt_vg(void)
194{
195 struct opt_rio *ptr;
196 debug("%s ---\n", __func__);
197 list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) {
198 debug("%s - rio_type %x\n", __func__, ptr->rio_type);
199 debug("%s - chassis_num: %x\n", __func__, ptr->chassis_num);
200 debug("%s - first_slot_num: %x\n", __func__, ptr->first_slot_num);
201 debug("%s - middle_num: %x\n", __func__, ptr->middle_num);
202 }
203}
204
205static void __init print_ebda_hpc(void)
206{
207 struct controller *hpc_ptr;
208 u16 index;
209
210 list_for_each_entry(hpc_ptr, &ebda_hpc_head, ebda_hpc_list) {
211 for (index = 0; index < hpc_ptr->slot_count; index++) {
212 debug("%s - physical slot#: %x\n", __func__, hpc_ptr->slots[index].slot_num);
213 debug("%s - pci bus# of the slot: %x\n", __func__, hpc_ptr->slots[index].slot_bus_num);
214 debug("%s - index into ctlr addr: %x\n", __func__, hpc_ptr->slots[index].ctl_index);
215 debug("%s - cap of the slot: %x\n", __func__, hpc_ptr->slots[index].slot_cap);
216 }
217
218 for (index = 0; index < hpc_ptr->bus_count; index++)
219 debug("%s - bus# of each bus controlled by this ctlr: %x\n", __func__, hpc_ptr->buses[index].bus_num);
220
221 debug("%s - type of hpc: %x\n", __func__, hpc_ptr->ctlr_type);
222 switch (hpc_ptr->ctlr_type) {
223 case 1:
224 debug("%s - bus: %x\n", __func__, hpc_ptr->u.pci_ctlr.bus);
225 debug("%s - dev_fun: %x\n", __func__, hpc_ptr->u.pci_ctlr.dev_fun);
226 debug("%s - irq: %x\n", __func__, hpc_ptr->irq);
227 break;
228
229 case 0:
230 debug("%s - io_start: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_start);
231 debug("%s - io_end: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_end);
232 debug("%s - irq: %x\n", __func__, hpc_ptr->irq);
233 break;
234
235 case 2:
236 case 4:
237 debug("%s - wpegbbar: %lx\n", __func__, hpc_ptr->u.wpeg_ctlr.wpegbbar);
238 debug("%s - i2c_addr: %x\n", __func__, hpc_ptr->u.wpeg_ctlr.i2c_addr);
239 debug("%s - irq: %x\n", __func__, hpc_ptr->irq);
240 break;
241 }
242 }
243}
244
245int __init ibmphp_access_ebda(void)
246{
247 u8 format, num_ctlrs, rio_complete, hs_complete, ebda_sz;
248 u16 ebda_seg, num_entries, next_offset, offset, blk_id, sub_addr, re, rc_id, re_id, base;
249 int rc = 0;
250
251
252 rio_complete = 0;
253 hs_complete = 0;
254
255 io_mem = ioremap((0x40 << 4) + 0x0e, 2);
256 if (!io_mem)
257 return -ENOMEM;
258 ebda_seg = readw(io_mem);
259 iounmap(io_mem);
260 debug("returned ebda segment: %x\n", ebda_seg);
261
262 io_mem = ioremap(ebda_seg<<4, 1);
263 if (!io_mem)
264 return -ENOMEM;
265 ebda_sz = readb(io_mem);
266 iounmap(io_mem);
267 debug("ebda size: %d(KiB)\n", ebda_sz);
268 if (ebda_sz == 0)
269 return -ENOMEM;
270
271 io_mem = ioremap(ebda_seg<<4, (ebda_sz * 1024));
272 if (!io_mem)
273 return -ENOMEM;
274 next_offset = 0x180;
275
276 for (;;) {
277 offset = next_offset;
278
279 /* Make sure what we read is still in the mapped section */
280 if (WARN(offset > (ebda_sz * 1024 - 4),
281 "ibmphp_ebda: next read is beyond ebda_sz\n"))
282 break;
283
284 next_offset = readw(io_mem + offset); /* offset of next blk */
285
286 offset += 2;
287 if (next_offset == 0) /* 0 indicate it's last blk */
288 break;
289 blk_id = readw(io_mem + offset); /* this blk id */
290
291 offset += 2;
292 /* check if it is hot swap block or rio block */
293 if (blk_id != 0x4853 && blk_id != 0x4752)
294 continue;
295 /* found hs table */
296 if (blk_id == 0x4853) {
297 debug("now enter hot swap block---\n");
298 debug("hot blk id: %x\n", blk_id);
299 format = readb(io_mem + offset);
300
301 offset += 1;
302 if (format != 4)
303 goto error_nodev;
304 debug("hot blk format: %x\n", format);
305 /* hot swap sub blk */
306 base = offset;
307
308 sub_addr = base;
309 re = readw(io_mem + sub_addr); /* next sub blk */
310
311 sub_addr += 2;
312 rc_id = readw(io_mem + sub_addr); /* sub blk id */
313
314 sub_addr += 2;
315 if (rc_id != 0x5243)
316 goto error_nodev;
317 /* rc sub blk signature */
318 num_ctlrs = readb(io_mem + sub_addr);
319
320 sub_addr += 1;
321 hpc_list_ptr = alloc_ebda_hpc_list();
322 if (!hpc_list_ptr) {
323 rc = -ENOMEM;
324 goto out;
325 }
326 hpc_list_ptr->format = format;
327 hpc_list_ptr->num_ctlrs = num_ctlrs;
328 hpc_list_ptr->phys_addr = sub_addr; /* offset of RSRC_CONTROLLER blk */
329 debug("info about hpc descriptor---\n");
330 debug("hot blk format: %x\n", format);
331 debug("num of controller: %x\n", num_ctlrs);
332 debug("offset of hpc data structure entries: %x\n ", sub_addr);
333
334 sub_addr = base + re; /* re sub blk */
335 /* FIXME: rc is never used/checked */
336 rc = readw(io_mem + sub_addr); /* next sub blk */
337
338 sub_addr += 2;
339 re_id = readw(io_mem + sub_addr); /* sub blk id */
340
341 sub_addr += 2;
342 if (re_id != 0x5245)
343 goto error_nodev;
344
345 /* signature of re */
346 num_entries = readw(io_mem + sub_addr);
347
348 sub_addr += 2; /* offset of RSRC_ENTRIES blk */
349 rsrc_list_ptr = alloc_ebda_rsrc_list();
350 if (!rsrc_list_ptr) {
351 rc = -ENOMEM;
352 goto out;
353 }
354 rsrc_list_ptr->format = format;
355 rsrc_list_ptr->num_entries = num_entries;
356 rsrc_list_ptr->phys_addr = sub_addr;
357
358 debug("info about rsrc descriptor---\n");
359 debug("format: %x\n", format);
360 debug("num of rsrc: %x\n", num_entries);
361 debug("offset of rsrc data structure entries: %x\n ", sub_addr);
362
363 hs_complete = 1;
364 } else {
365 /* found rio table, blk_id == 0x4752 */
366 debug("now enter io table ---\n");
367 debug("rio blk id: %x\n", blk_id);
368
369 rio_table_ptr = kzalloc(sizeof(struct rio_table_hdr), GFP_KERNEL);
370 if (!rio_table_ptr) {
371 rc = -ENOMEM;
372 goto out;
373 }
374 rio_table_ptr->ver_num = readb(io_mem + offset);
375 rio_table_ptr->scal_count = readb(io_mem + offset + 1);
376 rio_table_ptr->riodev_count = readb(io_mem + offset + 2);
377 rio_table_ptr->offset = offset + 3 ;
378
379 debug("info about rio table hdr ---\n");
380 debug("ver_num: %x\nscal_count: %x\nriodev_count: %x\noffset of rio table: %x\n ",
381 rio_table_ptr->ver_num, rio_table_ptr->scal_count,
382 rio_table_ptr->riodev_count, rio_table_ptr->offset);
383
384 rio_complete = 1;
385 }
386 }
387
388 if (!hs_complete && !rio_complete)
389 goto error_nodev;
390
391 if (rio_table_ptr) {
392 if (rio_complete && rio_table_ptr->ver_num == 3) {
393 rc = ebda_rio_table();
394 if (rc)
395 goto out;
396 }
397 }
398 rc = ebda_rsrc_controller();
399 if (rc)
400 goto out;
401
402 rc = ebda_rsrc_rsrc();
403 goto out;
404error_nodev:
405 rc = -ENODEV;
406out:
407 iounmap(io_mem);
408 return rc;
409}
410
411/*
412 * map info of scalability details and rio details from physical address
413 */
414static int __init ebda_rio_table(void)
415{
416 u16 offset;
417 u8 i;
418 struct rio_detail *rio_detail_ptr;
419
420 offset = rio_table_ptr->offset;
421 offset += 12 * rio_table_ptr->scal_count;
422
423 // we do concern about rio details
424 for (i = 0; i < rio_table_ptr->riodev_count; i++) {
425 rio_detail_ptr = kzalloc(sizeof(struct rio_detail), GFP_KERNEL);
426 if (!rio_detail_ptr)
427 return -ENOMEM;
428 rio_detail_ptr->rio_node_id = readb(io_mem + offset);
429 rio_detail_ptr->bbar = readl(io_mem + offset + 1);
430 rio_detail_ptr->rio_type = readb(io_mem + offset + 5);
431 rio_detail_ptr->owner_id = readb(io_mem + offset + 6);
432 rio_detail_ptr->port0_node_connect = readb(io_mem + offset + 7);
433 rio_detail_ptr->port0_port_connect = readb(io_mem + offset + 8);
434 rio_detail_ptr->port1_node_connect = readb(io_mem + offset + 9);
435 rio_detail_ptr->port1_port_connect = readb(io_mem + offset + 10);
436 rio_detail_ptr->first_slot_num = readb(io_mem + offset + 11);
437 rio_detail_ptr->status = readb(io_mem + offset + 12);
438 rio_detail_ptr->wpindex = readb(io_mem + offset + 13);
439 rio_detail_ptr->chassis_num = readb(io_mem + offset + 14);
440// debug("rio_node_id: %x\nbbar: %x\nrio_type: %x\nowner_id: %x\nport0_node: %x\nport0_port: %x\nport1_node: %x\nport1_port: %x\nfirst_slot_num: %x\nstatus: %x\n", rio_detail_ptr->rio_node_id, rio_detail_ptr->bbar, rio_detail_ptr->rio_type, rio_detail_ptr->owner_id, rio_detail_ptr->port0_node_connect, rio_detail_ptr->port0_port_connect, rio_detail_ptr->port1_node_connect, rio_detail_ptr->port1_port_connect, rio_detail_ptr->first_slot_num, rio_detail_ptr->status);
441 //create linked list of chassis
442 if (rio_detail_ptr->rio_type == 4 || rio_detail_ptr->rio_type == 5)
443 list_add(&rio_detail_ptr->rio_detail_list, &rio_vg_head);
444 //create linked list of expansion box
445 else if (rio_detail_ptr->rio_type == 6 || rio_detail_ptr->rio_type == 7)
446 list_add(&rio_detail_ptr->rio_detail_list, &rio_lo_head);
447 else
448 // not in my concern
449 kfree(rio_detail_ptr);
450 offset += 15;
451 }
452 print_lo_info();
453 print_vg_info();
454 return 0;
455}
456
457/*
458 * reorganizing linked list of chassis
459 */
460static struct opt_rio *search_opt_vg(u8 chassis_num)
461{
462 struct opt_rio *ptr;
463 list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) {
464 if (ptr->chassis_num == chassis_num)
465 return ptr;
466 }
467 return NULL;
468}
469
470static int __init combine_wpg_for_chassis(void)
471{
472 struct opt_rio *opt_rio_ptr = NULL;
473 struct rio_detail *rio_detail_ptr = NULL;
474
475 list_for_each_entry(rio_detail_ptr, &rio_vg_head, rio_detail_list) {
476 opt_rio_ptr = search_opt_vg(rio_detail_ptr->chassis_num);
477 if (!opt_rio_ptr) {
478 opt_rio_ptr = kzalloc(sizeof(struct opt_rio), GFP_KERNEL);
479 if (!opt_rio_ptr)
480 return -ENOMEM;
481 opt_rio_ptr->rio_type = rio_detail_ptr->rio_type;
482 opt_rio_ptr->chassis_num = rio_detail_ptr->chassis_num;
483 opt_rio_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
484 opt_rio_ptr->middle_num = rio_detail_ptr->first_slot_num;
485 list_add(&opt_rio_ptr->opt_rio_list, &opt_vg_head);
486 } else {
487 opt_rio_ptr->first_slot_num = min(opt_rio_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
488 opt_rio_ptr->middle_num = max(opt_rio_ptr->middle_num, rio_detail_ptr->first_slot_num);
489 }
490 }
491 print_opt_vg();
492 return 0;
493}
494
495/*
496 * reorganizing linked list of expansion box
497 */
498static struct opt_rio_lo *search_opt_lo(u8 chassis_num)
499{
500 struct opt_rio_lo *ptr;
501 list_for_each_entry(ptr, &opt_lo_head, opt_rio_lo_list) {
502 if (ptr->chassis_num == chassis_num)
503 return ptr;
504 }
505 return NULL;
506}
507
508static int combine_wpg_for_expansion(void)
509{
510 struct opt_rio_lo *opt_rio_lo_ptr = NULL;
511 struct rio_detail *rio_detail_ptr = NULL;
512
513 list_for_each_entry(rio_detail_ptr, &rio_lo_head, rio_detail_list) {
514 opt_rio_lo_ptr = search_opt_lo(rio_detail_ptr->chassis_num);
515 if (!opt_rio_lo_ptr) {
516 opt_rio_lo_ptr = kzalloc(sizeof(struct opt_rio_lo), GFP_KERNEL);
517 if (!opt_rio_lo_ptr)
518 return -ENOMEM;
519 opt_rio_lo_ptr->rio_type = rio_detail_ptr->rio_type;
520 opt_rio_lo_ptr->chassis_num = rio_detail_ptr->chassis_num;
521 opt_rio_lo_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
522 opt_rio_lo_ptr->middle_num = rio_detail_ptr->first_slot_num;
523 opt_rio_lo_ptr->pack_count = 1;
524
525 list_add(&opt_rio_lo_ptr->opt_rio_lo_list, &opt_lo_head);
526 } else {
527 opt_rio_lo_ptr->first_slot_num = min(opt_rio_lo_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
528 opt_rio_lo_ptr->middle_num = max(opt_rio_lo_ptr->middle_num, rio_detail_ptr->first_slot_num);
529 opt_rio_lo_ptr->pack_count = 2;
530 }
531 }
532 return 0;
533}
534
535
536/* Since we don't know the max slot number per each chassis, hence go
537 * through the list of all chassis to find out the range
538 * Arguments: slot_num, 1st slot number of the chassis we think we are on,
539 * var (0 = chassis, 1 = expansion box)
540 */
541static int first_slot_num(u8 slot_num, u8 first_slot, u8 var)
542{
543 struct opt_rio *opt_vg_ptr = NULL;
544 struct opt_rio_lo *opt_lo_ptr = NULL;
545 int rc = 0;
546
547 if (!var) {
548 list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) {
549 if ((first_slot < opt_vg_ptr->first_slot_num) && (slot_num >= opt_vg_ptr->first_slot_num)) {
550 rc = -ENODEV;
551 break;
552 }
553 }
554 } else {
555 list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) {
556 if ((first_slot < opt_lo_ptr->first_slot_num) && (slot_num >= opt_lo_ptr->first_slot_num)) {
557 rc = -ENODEV;
558 break;
559 }
560 }
561 }
562 return rc;
563}
564
565static struct opt_rio_lo *find_rxe_num(u8 slot_num)
566{
567 struct opt_rio_lo *opt_lo_ptr;
568
569 list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) {
570 //check to see if this slot_num belongs to expansion box
571 if ((slot_num >= opt_lo_ptr->first_slot_num) && (!first_slot_num(slot_num, opt_lo_ptr->first_slot_num, 1)))
572 return opt_lo_ptr;
573 }
574 return NULL;
575}
576
577static struct opt_rio *find_chassis_num(u8 slot_num)
578{
579 struct opt_rio *opt_vg_ptr;
580
581 list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) {
582 //check to see if this slot_num belongs to chassis
583 if ((slot_num >= opt_vg_ptr->first_slot_num) && (!first_slot_num(slot_num, opt_vg_ptr->first_slot_num, 0)))
584 return opt_vg_ptr;
585 }
586 return NULL;
587}
588
589/* This routine will find out how many slots are in the chassis, so that
590 * the slot numbers for rxe100 would start from 1, and not from 7, or 6 etc
591 */
592static u8 calculate_first_slot(u8 slot_num)
593{
594 u8 first_slot = 1;
595 struct slot *slot_cur;
596
597 list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
598 if (slot_cur->ctrl) {
599 if ((slot_cur->ctrl->ctlr_type != 4) && (slot_cur->ctrl->ending_slot_num > first_slot) && (slot_num > slot_cur->ctrl->ending_slot_num))
600 first_slot = slot_cur->ctrl->ending_slot_num;
601 }
602 }
603 return first_slot + 1;
604
605}
606
607#define SLOT_NAME_SIZE 30
608
609static char *create_file_name(struct slot *slot_cur)
610{
611 struct opt_rio *opt_vg_ptr = NULL;
612 struct opt_rio_lo *opt_lo_ptr = NULL;
613 static char str[SLOT_NAME_SIZE];
614 int which = 0; /* rxe = 1, chassis = 0 */
615 u8 number = 1; /* either chassis or rxe # */
616 u8 first_slot = 1;
617 u8 slot_num;
618 u8 flag = 0;
619
620 if (!slot_cur) {
621 err("Structure passed is empty\n");
622 return NULL;
623 }
624
625 slot_num = slot_cur->number;
626
627 memset(str, 0, sizeof(str));
628
629 if (rio_table_ptr) {
630 if (rio_table_ptr->ver_num == 3) {
631 opt_vg_ptr = find_chassis_num(slot_num);
632 opt_lo_ptr = find_rxe_num(slot_num);
633 }
634 }
635 if (opt_vg_ptr) {
636 if (opt_lo_ptr) {
637 if ((slot_num - opt_vg_ptr->first_slot_num) > (slot_num - opt_lo_ptr->first_slot_num)) {
638 number = opt_lo_ptr->chassis_num;
639 first_slot = opt_lo_ptr->first_slot_num;
640 which = 1; /* it is RXE */
641 } else {
642 first_slot = opt_vg_ptr->first_slot_num;
643 number = opt_vg_ptr->chassis_num;
644 which = 0;
645 }
646 } else {
647 first_slot = opt_vg_ptr->first_slot_num;
648 number = opt_vg_ptr->chassis_num;
649 which = 0;
650 }
651 ++flag;
652 } else if (opt_lo_ptr) {
653 number = opt_lo_ptr->chassis_num;
654 first_slot = opt_lo_ptr->first_slot_num;
655 which = 1;
656 ++flag;
657 } else if (rio_table_ptr) {
658 if (rio_table_ptr->ver_num == 3) {
659 /* if both NULL and we DO have correct RIO table in BIOS */
660 return NULL;
661 }
662 }
663 if (!flag) {
664 if (slot_cur->ctrl->ctlr_type == 4) {
665 first_slot = calculate_first_slot(slot_num);
666 which = 1;
667 } else {
668 which = 0;
669 }
670 }
671
672 sprintf(str, "%s%dslot%d",
673 which == 0 ? "chassis" : "rxe",
674 number, slot_num - first_slot + 1);
675 return str;
676}
677
678static int fillslotinfo(struct hotplug_slot *hotplug_slot)
679{
680 struct slot *slot;
681 int rc = 0;
682
683 if (!hotplug_slot || !hotplug_slot->private)
684 return -EINVAL;
685
686 slot = hotplug_slot->private;
687 rc = ibmphp_hpc_readslot(slot, READ_ALLSTAT, NULL);
688 if (rc)
689 return rc;
690
691 // power - enabled:1 not:0
692 hotplug_slot->info->power_status = SLOT_POWER(slot->status);
693
694 // attention - off:0, on:1, blinking:2
695 hotplug_slot->info->attention_status = SLOT_ATTN(slot->status, slot->ext_status);
696
697 // latch - open:1 closed:0
698 hotplug_slot->info->latch_status = SLOT_LATCH(slot->status);
699
700 // pci board - present:1 not:0
701 if (SLOT_PRESENT(slot->status))
702 hotplug_slot->info->adapter_status = 1;
703 else
704 hotplug_slot->info->adapter_status = 0;
705/*
706 if (slot->bus_on->supported_bus_mode
707 && (slot->bus_on->supported_speed == BUS_SPEED_66))
708 hotplug_slot->info->max_bus_speed_status = BUS_SPEED_66PCIX;
709 else
710 hotplug_slot->info->max_bus_speed_status = slot->bus_on->supported_speed;
711*/
712
713 return rc;
714}
715
716static void release_slot(struct hotplug_slot *hotplug_slot)
717{
718 struct slot *slot;
719
720 if (!hotplug_slot || !hotplug_slot->private)
721 return;
722
723 slot = hotplug_slot->private;
724 kfree(slot->hotplug_slot->info);
725 kfree(slot->hotplug_slot);
726 slot->ctrl = NULL;
727 slot->bus_on = NULL;
728
729 /* we don't want to actually remove the resources, since free_resources will do just that */
730 ibmphp_unconfigure_card(&slot, -1);
731
732 kfree(slot);
733}
734
735static struct pci_driver ibmphp_driver;
736
737/*
738 * map info (ctlr-id, slot count, slot#.. bus count, bus#, ctlr type...) of
739 * each hpc from physical address to a list of hot plug controllers based on
740 * hpc descriptors.
741 */
742static int __init ebda_rsrc_controller(void)
743{
744 u16 addr, addr_slot, addr_bus;
745 u8 ctlr_id, temp, bus_index;
746 u16 ctlr, slot, bus;
747 u16 slot_num, bus_num, index;
748 struct hotplug_slot *hp_slot_ptr;
749 struct controller *hpc_ptr;
750 struct ebda_hpc_bus *bus_ptr;
751 struct ebda_hpc_slot *slot_ptr;
752 struct bus_info *bus_info_ptr1, *bus_info_ptr2;
753 int rc;
754 struct slot *tmp_slot;
755 char name[SLOT_NAME_SIZE];
756
757 addr = hpc_list_ptr->phys_addr;
758 for (ctlr = 0; ctlr < hpc_list_ptr->num_ctlrs; ctlr++) {
759 bus_index = 1;
760 ctlr_id = readb(io_mem + addr);
761 addr += 1;
762 slot_num = readb(io_mem + addr);
763
764 addr += 1;
765 addr_slot = addr; /* offset of slot structure */
766 addr += (slot_num * 4);
767
768 bus_num = readb(io_mem + addr);
769
770 addr += 1;
771 addr_bus = addr; /* offset of bus */
772 addr += (bus_num * 9); /* offset of ctlr_type */
773 temp = readb(io_mem + addr);
774
775 addr += 1;
776 /* init hpc structure */
777 hpc_ptr = alloc_ebda_hpc(slot_num, bus_num);
778 if (!hpc_ptr) {
779 rc = -ENOMEM;
780 goto error_no_hpc;
781 }
782 hpc_ptr->ctlr_id = ctlr_id;
783 hpc_ptr->ctlr_relative_id = ctlr;
784 hpc_ptr->slot_count = slot_num;
785 hpc_ptr->bus_count = bus_num;
786 debug("now enter ctlr data structure ---\n");
787 debug("ctlr id: %x\n", ctlr_id);
788 debug("ctlr_relative_id: %x\n", hpc_ptr->ctlr_relative_id);
789 debug("count of slots controlled by this ctlr: %x\n", slot_num);
790 debug("count of buses controlled by this ctlr: %x\n", bus_num);
791
792 /* init slot structure, fetch slot, bus, cap... */
793 slot_ptr = hpc_ptr->slots;
794 for (slot = 0; slot < slot_num; slot++) {
795 slot_ptr->slot_num = readb(io_mem + addr_slot);
796 slot_ptr->slot_bus_num = readb(io_mem + addr_slot + slot_num);
797 slot_ptr->ctl_index = readb(io_mem + addr_slot + 2*slot_num);
798 slot_ptr->slot_cap = readb(io_mem + addr_slot + 3*slot_num);
799
800 // create bus_info lined list --- if only one slot per bus: slot_min = slot_max
801
802 bus_info_ptr2 = ibmphp_find_same_bus_num(slot_ptr->slot_bus_num);
803 if (!bus_info_ptr2) {
804 bus_info_ptr1 = kzalloc(sizeof(struct bus_info), GFP_KERNEL);
805 if (!bus_info_ptr1) {
806 rc = -ENOMEM;
807 goto error_no_hp_slot;
808 }
809 bus_info_ptr1->slot_min = slot_ptr->slot_num;
810 bus_info_ptr1->slot_max = slot_ptr->slot_num;
811 bus_info_ptr1->slot_count += 1;
812 bus_info_ptr1->busno = slot_ptr->slot_bus_num;
813 bus_info_ptr1->index = bus_index++;
814 bus_info_ptr1->current_speed = 0xff;
815 bus_info_ptr1->current_bus_mode = 0xff;
816
817 bus_info_ptr1->controller_id = hpc_ptr->ctlr_id;
818
819 list_add_tail(&bus_info_ptr1->bus_info_list, &bus_info_head);
820
821 } else {
822 bus_info_ptr2->slot_min = min(bus_info_ptr2->slot_min, slot_ptr->slot_num);
823 bus_info_ptr2->slot_max = max(bus_info_ptr2->slot_max, slot_ptr->slot_num);
824 bus_info_ptr2->slot_count += 1;
825
826 }
827
828 // end of creating the bus_info linked list
829
830 slot_ptr++;
831 addr_slot += 1;
832 }
833
834 /* init bus structure */
835 bus_ptr = hpc_ptr->buses;
836 for (bus = 0; bus < bus_num; bus++) {
837 bus_ptr->bus_num = readb(io_mem + addr_bus + bus);
838 bus_ptr->slots_at_33_conv = readb(io_mem + addr_bus + bus_num + 8 * bus);
839 bus_ptr->slots_at_66_conv = readb(io_mem + addr_bus + bus_num + 8 * bus + 1);
840
841 bus_ptr->slots_at_66_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 2);
842
843 bus_ptr->slots_at_100_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 3);
844
845 bus_ptr->slots_at_133_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 4);
846
847 bus_info_ptr2 = ibmphp_find_same_bus_num(bus_ptr->bus_num);
848 if (bus_info_ptr2) {
849 bus_info_ptr2->slots_at_33_conv = bus_ptr->slots_at_33_conv;
850 bus_info_ptr2->slots_at_66_conv = bus_ptr->slots_at_66_conv;
851 bus_info_ptr2->slots_at_66_pcix = bus_ptr->slots_at_66_pcix;
852 bus_info_ptr2->slots_at_100_pcix = bus_ptr->slots_at_100_pcix;
853 bus_info_ptr2->slots_at_133_pcix = bus_ptr->slots_at_133_pcix;
854 }
855 bus_ptr++;
856 }
857
858 hpc_ptr->ctlr_type = temp;
859
860 switch (hpc_ptr->ctlr_type) {
861 case 1:
862 hpc_ptr->u.pci_ctlr.bus = readb(io_mem + addr);
863 hpc_ptr->u.pci_ctlr.dev_fun = readb(io_mem + addr + 1);
864 hpc_ptr->irq = readb(io_mem + addr + 2);
865 addr += 3;
866 debug("ctrl bus = %x, ctlr devfun = %x, irq = %x\n",
867 hpc_ptr->u.pci_ctlr.bus,
868 hpc_ptr->u.pci_ctlr.dev_fun, hpc_ptr->irq);
869 break;
870
871 case 0:
872 hpc_ptr->u.isa_ctlr.io_start = readw(io_mem + addr);
873 hpc_ptr->u.isa_ctlr.io_end = readw(io_mem + addr + 2);
874 if (!request_region(hpc_ptr->u.isa_ctlr.io_start,
875 (hpc_ptr->u.isa_ctlr.io_end - hpc_ptr->u.isa_ctlr.io_start + 1),
876 "ibmphp")) {
877 rc = -ENODEV;
878 goto error_no_hp_slot;
879 }
880 hpc_ptr->irq = readb(io_mem + addr + 4);
881 addr += 5;
882 break;
883
884 case 2:
885 case 4:
886 hpc_ptr->u.wpeg_ctlr.wpegbbar = readl(io_mem + addr);
887 hpc_ptr->u.wpeg_ctlr.i2c_addr = readb(io_mem + addr + 4);
888 hpc_ptr->irq = readb(io_mem + addr + 5);
889 addr += 6;
890 break;
891 default:
892 rc = -ENODEV;
893 goto error_no_hp_slot;
894 }
895
896 //reorganize chassis' linked list
897 combine_wpg_for_chassis();
898 combine_wpg_for_expansion();
899 hpc_ptr->revision = 0xff;
900 hpc_ptr->options = 0xff;
901 hpc_ptr->starting_slot_num = hpc_ptr->slots[0].slot_num;
902 hpc_ptr->ending_slot_num = hpc_ptr->slots[slot_num-1].slot_num;
903
904 // register slots with hpc core as well as create linked list of ibm slot
905 for (index = 0; index < hpc_ptr->slot_count; index++) {
906
907 hp_slot_ptr = kzalloc(sizeof(*hp_slot_ptr), GFP_KERNEL);
908 if (!hp_slot_ptr) {
909 rc = -ENOMEM;
910 goto error_no_hp_slot;
911 }
912
913 hp_slot_ptr->info = kzalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
914 if (!hp_slot_ptr->info) {
915 rc = -ENOMEM;
916 goto error_no_hp_info;
917 }
918
919 tmp_slot = kzalloc(sizeof(*tmp_slot), GFP_KERNEL);
920 if (!tmp_slot) {
921 rc = -ENOMEM;
922 goto error_no_slot;
923 }
924
925 tmp_slot->flag = 1;
926
927 tmp_slot->capabilities = hpc_ptr->slots[index].slot_cap;
928 if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_133_MAX) == EBDA_SLOT_133_MAX)
929 tmp_slot->supported_speed = 3;
930 else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_100_MAX) == EBDA_SLOT_100_MAX)
931 tmp_slot->supported_speed = 2;
932 else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_66_MAX) == EBDA_SLOT_66_MAX)
933 tmp_slot->supported_speed = 1;
934
935 if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_PCIX_CAP) == EBDA_SLOT_PCIX_CAP)
936 tmp_slot->supported_bus_mode = 1;
937 else
938 tmp_slot->supported_bus_mode = 0;
939
940
941 tmp_slot->bus = hpc_ptr->slots[index].slot_bus_num;
942
943 bus_info_ptr1 = ibmphp_find_same_bus_num(hpc_ptr->slots[index].slot_bus_num);
944 if (!bus_info_ptr1) {
945 kfree(tmp_slot);
946 rc = -ENODEV;
947 goto error;
948 }
949 tmp_slot->bus_on = bus_info_ptr1;
950 bus_info_ptr1 = NULL;
951 tmp_slot->ctrl = hpc_ptr;
952
953 tmp_slot->ctlr_index = hpc_ptr->slots[index].ctl_index;
954 tmp_slot->number = hpc_ptr->slots[index].slot_num;
955 tmp_slot->hotplug_slot = hp_slot_ptr;
956
957 hp_slot_ptr->private = tmp_slot;
958 hp_slot_ptr->release = release_slot;
959
960 rc = fillslotinfo(hp_slot_ptr);
961 if (rc)
962 goto error;
963
964 rc = ibmphp_init_devno((struct slot **) &hp_slot_ptr->private);
965 if (rc)
966 goto error;
967 hp_slot_ptr->ops = &ibmphp_hotplug_slot_ops;
968
969 // end of registering ibm slot with hotplug core
970
971 list_add(&((struct slot *)(hp_slot_ptr->private))->ibm_slot_list, &ibmphp_slot_head);
972 }
973
974 print_bus_info();
975 list_add(&hpc_ptr->ebda_hpc_list, &ebda_hpc_head);
976
977 } /* each hpc */
978
979 list_for_each_entry(tmp_slot, &ibmphp_slot_head, ibm_slot_list) {
980 snprintf(name, SLOT_NAME_SIZE, "%s", create_file_name(tmp_slot));
981 pci_hp_register(tmp_slot->hotplug_slot,
982 pci_find_bus(0, tmp_slot->bus), tmp_slot->device, name);
983 }
984
985 print_ebda_hpc();
986 print_ibm_slot();
987 return 0;
988
989error:
990 kfree(hp_slot_ptr->private);
991error_no_slot:
992 kfree(hp_slot_ptr->info);
993error_no_hp_info:
994 kfree(hp_slot_ptr);
995error_no_hp_slot:
996 free_ebda_hpc(hpc_ptr);
997error_no_hpc:
998 iounmap(io_mem);
999 return rc;
1000}
1001
1002/*
1003 * map info (bus, devfun, start addr, end addr..) of i/o, memory,
1004 * pfm from the physical addr to a list of resource.
1005 */
1006static int __init ebda_rsrc_rsrc(void)
1007{
1008 u16 addr;
1009 short rsrc;
1010 u8 type, rsrc_type;
1011 struct ebda_pci_rsrc *rsrc_ptr;
1012
1013 addr = rsrc_list_ptr->phys_addr;
1014 debug("now entering rsrc land\n");
1015 debug("offset of rsrc: %x\n", rsrc_list_ptr->phys_addr);
1016
1017 for (rsrc = 0; rsrc < rsrc_list_ptr->num_entries; rsrc++) {
1018 type = readb(io_mem + addr);
1019
1020 addr += 1;
1021 rsrc_type = type & EBDA_RSRC_TYPE_MASK;
1022
1023 if (rsrc_type == EBDA_IO_RSRC_TYPE) {
1024 rsrc_ptr = alloc_ebda_pci_rsrc();
1025 if (!rsrc_ptr) {
1026 iounmap(io_mem);
1027 return -ENOMEM;
1028 }
1029 rsrc_ptr->rsrc_type = type;
1030
1031 rsrc_ptr->bus_num = readb(io_mem + addr);
1032 rsrc_ptr->dev_fun = readb(io_mem + addr + 1);
1033 rsrc_ptr->start_addr = readw(io_mem + addr + 2);
1034 rsrc_ptr->end_addr = readw(io_mem + addr + 4);
1035 addr += 6;
1036
1037 debug("rsrc from io type ----\n");
1038 debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
1039 rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
1040
1041 list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
1042 }
1043
1044 if (rsrc_type == EBDA_MEM_RSRC_TYPE || rsrc_type == EBDA_PFM_RSRC_TYPE) {
1045 rsrc_ptr = alloc_ebda_pci_rsrc();
1046 if (!rsrc_ptr) {
1047 iounmap(io_mem);
1048 return -ENOMEM;
1049 }
1050 rsrc_ptr->rsrc_type = type;
1051
1052 rsrc_ptr->bus_num = readb(io_mem + addr);
1053 rsrc_ptr->dev_fun = readb(io_mem + addr + 1);
1054 rsrc_ptr->start_addr = readl(io_mem + addr + 2);
1055 rsrc_ptr->end_addr = readl(io_mem + addr + 6);
1056 addr += 10;
1057
1058 debug("rsrc from mem or pfm ---\n");
1059 debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
1060 rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
1061
1062 list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
1063 }
1064 }
1065 kfree(rsrc_list_ptr);
1066 rsrc_list_ptr = NULL;
1067 print_ebda_pci_rsrc();
1068 return 0;
1069}
1070
1071u16 ibmphp_get_total_controllers(void)
1072{
1073 return hpc_list_ptr->num_ctlrs;
1074}
1075
1076struct slot *ibmphp_get_slot_from_physical_num(u8 physical_num)
1077{
1078 struct slot *slot;
1079
1080 list_for_each_entry(slot, &ibmphp_slot_head, ibm_slot_list) {
1081 if (slot->number == physical_num)
1082 return slot;
1083 }
1084 return NULL;
1085}
1086
1087/* To find:
1088 * - the smallest slot number
1089 * - the largest slot number
1090 * - the total number of the slots based on each bus
1091 * (if only one slot per bus slot_min = slot_max )
1092 */
1093struct bus_info *ibmphp_find_same_bus_num(u32 num)
1094{
1095 struct bus_info *ptr;
1096
1097 list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
1098 if (ptr->busno == num)
1099 return ptr;
1100 }
1101 return NULL;
1102}
1103
1104/* Finding relative bus number, in order to map corresponding
1105 * bus register
1106 */
1107int ibmphp_get_bus_index(u8 num)
1108{
1109 struct bus_info *ptr;
1110
1111 list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
1112 if (ptr->busno == num)
1113 return ptr->index;
1114 }
1115 return -ENODEV;
1116}
1117
1118void ibmphp_free_bus_info_queue(void)
1119{
1120 struct bus_info *bus_info, *next;
1121
1122 list_for_each_entry_safe(bus_info, next, &bus_info_head,
1123 bus_info_list) {
1124 kfree (bus_info);
1125 }
1126}
1127
1128void ibmphp_free_ebda_hpc_queue(void)
1129{
1130 struct controller *controller = NULL, *next;
1131 int pci_flag = 0;
1132
1133 list_for_each_entry_safe(controller, next, &ebda_hpc_head,
1134 ebda_hpc_list) {
1135 if (controller->ctlr_type == 0)
1136 release_region(controller->u.isa_ctlr.io_start, (controller->u.isa_ctlr.io_end - controller->u.isa_ctlr.io_start + 1));
1137 else if ((controller->ctlr_type == 1) && (!pci_flag)) {
1138 ++pci_flag;
1139 pci_unregister_driver(&ibmphp_driver);
1140 }
1141 free_ebda_hpc(controller);
1142 }
1143}
1144
1145void ibmphp_free_ebda_pci_rsrc_queue(void)
1146{
1147 struct ebda_pci_rsrc *resource, *next;
1148
1149 list_for_each_entry_safe(resource, next, &ibmphp_ebda_pci_rsrc_head,
1150 ebda_pci_rsrc_list) {
1151 kfree (resource);
1152 resource = NULL;
1153 }
1154}
1155
1156static struct pci_device_id id_table[] = {
1157 {
1158 .vendor = PCI_VENDOR_ID_IBM,
1159 .device = HPC_DEVICE_ID,
1160 .subvendor = PCI_VENDOR_ID_IBM,
1161 .subdevice = HPC_SUBSYSTEM_ID,
1162 .class = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
1163 }, {}
1164};
1165
1166MODULE_DEVICE_TABLE(pci, id_table);
1167
1168static int ibmphp_probe(struct pci_dev *, const struct pci_device_id *);
1169static struct pci_driver ibmphp_driver = {
1170 .name = "ibmphp",
1171 .id_table = id_table,
1172 .probe = ibmphp_probe,
1173};
1174
1175int ibmphp_register_pci(void)
1176{
1177 struct controller *ctrl;
1178 int rc = 0;
1179
1180 list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
1181 if (ctrl->ctlr_type == 1) {
1182 rc = pci_register_driver(&ibmphp_driver);
1183 break;
1184 }
1185 }
1186 return rc;
1187}
1188static int ibmphp_probe(struct pci_dev *dev, const struct pci_device_id *ids)
1189{
1190 struct controller *ctrl;
1191
1192 debug("inside ibmphp_probe\n");
1193
1194 list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
1195 if (ctrl->ctlr_type == 1) {
1196 if ((dev->devfn == ctrl->u.pci_ctlr.dev_fun) && (dev->bus->number == ctrl->u.pci_ctlr.bus)) {
1197 ctrl->ctrl_dev = dev;
1198 debug("found device!!!\n");
1199 debug("dev->device = %x, dev->subsystem_device = %x\n", dev->device, dev->subsystem_device);
1200 return 0;
1201 }
1202 }
1203 }
1204 return -ENODEV;
1205}