?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / pci / hotplug / ibmphp_ebda.c
blob64549aa24c0fe1cf6a5f23528542fff8c116f069
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 */
38 LIST_HEAD(ibmphp_ebda_pci_rsrc_head);
39 LIST_HEAD(ibmphp_slot_head);
40
41 /* Local variables */
42 static struct ebda_hpc_list *hpc_list_ptr;
43 static struct ebda_rsrc_list *rsrc_list_ptr;
44 static struct rio_table_hdr *rio_table_ptr = NULL;
45 static LIST_HEAD(ebda_hpc_head);
46 static LIST_HEAD(bus_info_head);
47 static LIST_HEAD(rio_vg_head);
48 static LIST_HEAD(rio_lo_head);
49 static LIST_HEAD(opt_vg_head);
50 static LIST_HEAD(opt_lo_head);
51 static void __iomem *io_mem;
52
53 /* Local functions */
54 static int ebda_rsrc_controller(void);
55 static int ebda_rsrc_rsrc(void);
56 static int ebda_rio_table(void);
57
58 static struct ebda_hpc_list * __init alloc_ebda_hpc_list(void)
59 {
60 return kzalloc(sizeof(struct ebda_hpc_list), GFP_KERNEL);
61 }
62
63 static 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;
84 error_slots:
85 kfree(controller->slots);
86 error_contr:
87 kfree(controller);
88 error:
89 return NULL;
90 }
91
92 static void free_ebda_hpc(struct controller *controller)
93 {
94 kfree(controller->slots);
95 kfree(controller->buses);
96 kfree(controller);
97 }
98
99 static struct ebda_rsrc_list * __init alloc_ebda_rsrc_list(void)
100 {
101 return kzalloc(sizeof(struct ebda_rsrc_list), GFP_KERNEL);
102 }
103
104 static struct ebda_pci_rsrc *alloc_ebda_pci_rsrc(void)
105 {
106 return kzalloc(sizeof(struct ebda_pci_rsrc), GFP_KERNEL);
107 }
108
109 static 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
130 static 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
145 static 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
160 static 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
170 static 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
179 static 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
191 static 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
231 int __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;
390 error_nodev:
391 rc = -ENODEV;
392 out:
393 iounmap(io_mem);
394 return rc;
395 }
396
397 /*
398 * map info of scalability details and rio details from physical address
399 */
400 static 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 */
446 static 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
456 static 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 */
484 static 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
494 static 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 */
527 static 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
551 static 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
563 static 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 */
578 static 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
595 static 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
664 static 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
702 static 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
721 static 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 */
728 static 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
975 error:
976 kfree(hp_slot_ptr->private);
977 error_no_slot:
978 kfree(hp_slot_ptr->info);
979 error_no_hp_info:
980 kfree(hp_slot_ptr);
981 error_no_hp_slot:
982 free_ebda_hpc(hpc_ptr);
983 error_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 */
992 static 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
1057 u16 ibmphp_get_total_controllers(void)
1058 {
1059 return hpc_list_ptr->num_ctlrs;
1060 }
1061
1062 struct 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 */
1079 struct 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 */
1093 int 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
1104 void 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
1114 void 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
1131 void 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
1142 static 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
1152 MODULE_DEVICE_TABLE(pci, id_table);
1153
1154 static int ibmphp_probe(struct pci_dev *, const struct pci_device_id *);
1155 static struct pci_driver ibmphp_driver = {
1156 .name = "ibmphp",
1157 .id_table = id_table,
1158 .probe = ibmphp_probe,
1159 };
1160
1161 int 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 }
1174 static 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 }
CRIS linux kernel tree