Version:  2.6.34 2.6.35 2.6.36 2.6.37 2.6.38 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14

Linux/drivers/pci/hotplug/ibmphp_ebda.c

  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 */
 52 LIST_HEAD (ibmphp_ebda_pci_rsrc_head);
 53 LIST_HEAD (ibmphp_slot_head);
 54 
 55 /* Local variables */
 56 static struct ebda_hpc_list *hpc_list_ptr;
 57 static struct ebda_rsrc_list *rsrc_list_ptr;
 58 static struct rio_table_hdr *rio_table_ptr = NULL;
 59 static LIST_HEAD (ebda_hpc_head);
 60 static LIST_HEAD (bus_info_head);
 61 static LIST_HEAD (rio_vg_head);
 62 static LIST_HEAD (rio_lo_head);
 63 static LIST_HEAD (opt_vg_head);
 64 static LIST_HEAD (opt_lo_head);
 65 static void __iomem *io_mem;
 66 
 67 /* Local functions */
 68 static int ebda_rsrc_controller (void);
 69 static int ebda_rsrc_rsrc (void);
 70 static int ebda_rio_table (void);
 71 
 72 static struct ebda_hpc_list * __init alloc_ebda_hpc_list (void)
 73 {
 74         return kzalloc(sizeof(struct ebda_hpc_list), GFP_KERNEL);
 75 }
 76 
 77 static 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;
 98 error_slots:
 99         kfree(controller->slots);
100 error_contr:
101         kfree(controller);
102 error:
103         return NULL;
104 }
105 
106 static void free_ebda_hpc (struct controller *controller)
107 {
108         kfree (controller->slots);
109         kfree (controller->buses);
110         kfree (controller);
111 }
112 
113 static struct ebda_rsrc_list * __init alloc_ebda_rsrc_list (void)
114 {
115         return kzalloc(sizeof(struct ebda_rsrc_list), GFP_KERNEL);
116 }
117 
118 static struct ebda_pci_rsrc *alloc_ebda_pci_rsrc (void)
119 {
120         return kzalloc(sizeof(struct ebda_pci_rsrc), GFP_KERNEL);
121 }
122 
123 static 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 
144 static 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 
159 static 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 
174 static 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 
184 static 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 
193 static 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 
205 static 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 
222                 debug ("%s - type of hpc: %x\n", __func__, hpc_ptr->ctlr_type);
223                 switch (hpc_ptr->ctlr_type) {
224                 case 1:
225                         debug ("%s - bus: %x\n", __func__, hpc_ptr->u.pci_ctlr.bus);
226                         debug ("%s - dev_fun: %x\n", __func__, hpc_ptr->u.pci_ctlr.dev_fun);
227                         debug ("%s - irq: %x\n", __func__, hpc_ptr->irq);
228                         break;
229 
230                 case 0:
231                         debug ("%s - io_start: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_start);
232                         debug ("%s - io_end: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_end);
233                         debug ("%s - irq: %x\n", __func__, hpc_ptr->irq);
234                         break;
235 
236                 case 2:
237                 case 4:
238                         debug ("%s - wpegbbar: %lx\n", __func__, hpc_ptr->u.wpeg_ctlr.wpegbbar);
239                         debug ("%s - i2c_addr: %x\n", __func__, hpc_ptr->u.wpeg_ctlr.i2c_addr);
240                         debug ("%s - irq: %x\n", __func__, hpc_ptr->irq);
241                         break;
242                 }
243         }
244 }
245 
246 int __init ibmphp_access_ebda (void)
247 {
248         u8 format, num_ctlrs, rio_complete, hs_complete, ebda_sz;
249         u16 ebda_seg, num_entries, next_offset, offset, blk_id, sub_addr, re, rc_id, re_id, base;
250         int rc = 0;
251 
252 
253         rio_complete = 0;
254         hs_complete = 0;
255 
256         io_mem = ioremap ((0x40 << 4) + 0x0e, 2);
257         if (!io_mem )
258                 return -ENOMEM;
259         ebda_seg = readw (io_mem);
260         iounmap (io_mem);
261         debug ("returned ebda segment: %x\n", ebda_seg);
262 
263         io_mem = ioremap(ebda_seg<<4, 1);
264         if (!io_mem)
265                 return -ENOMEM;
266         ebda_sz = readb(io_mem);
267         iounmap(io_mem);
268         debug("ebda size: %d(KiB)\n", ebda_sz);
269         if (ebda_sz == 0)
270                 return -ENOMEM;
271 
272         io_mem = ioremap(ebda_seg<<4, (ebda_sz * 1024));
273         if (!io_mem )
274                 return -ENOMEM;
275         next_offset = 0x180;
276 
277         for (;;) {
278                 offset = next_offset;
279 
280                 /* Make sure what we read is still in the mapped section */
281                 if (WARN(offset > (ebda_sz * 1024 - 4),
282                          "ibmphp_ebda: next read is beyond ebda_sz\n"))
283                         break;
284 
285                 next_offset = readw (io_mem + offset);  /* offset of next blk */
286 
287                 offset += 2;
288                 if (next_offset == 0)   /* 0 indicate it's last blk */
289                         break;
290                 blk_id = readw (io_mem + offset);       /* this blk id */
291 
292                 offset += 2;
293                 /* check if it is hot swap block or rio block */
294                 if (blk_id != 0x4853 && blk_id != 0x4752)
295                         continue;
296                 /* found hs table */
297                 if (blk_id == 0x4853) {
298                         debug ("now enter hot swap block---\n");
299                         debug ("hot blk id: %x\n", blk_id);
300                         format = readb (io_mem + offset);
301 
302                         offset += 1;
303                         if (format != 4)
304                                 goto error_nodev;
305                         debug ("hot blk format: %x\n", format);
306                         /* hot swap sub blk */
307                         base = offset;
308 
309                         sub_addr = base;
310                         re = readw (io_mem + sub_addr); /* next sub blk */
311 
312                         sub_addr += 2;
313                         rc_id = readw (io_mem + sub_addr);      /* sub blk id */
314 
315                         sub_addr += 2;
316                         if (rc_id != 0x5243)
317                                 goto error_nodev;
318                         /* rc sub blk signature  */
319                         num_ctlrs = readb (io_mem + sub_addr);
320 
321                         sub_addr += 1;
322                         hpc_list_ptr = alloc_ebda_hpc_list ();
323                         if (!hpc_list_ptr) {
324                                 rc = -ENOMEM;
325                                 goto out;
326                         }
327                         hpc_list_ptr->format = format;
328                         hpc_list_ptr->num_ctlrs = num_ctlrs;
329                         hpc_list_ptr->phys_addr = sub_addr;     /*  offset of RSRC_CONTROLLER blk */
330                         debug ("info about hpc descriptor---\n");
331                         debug ("hot blk format: %x\n", format);
332                         debug ("num of controller: %x\n", num_ctlrs);
333                         debug ("offset of hpc data structure entries: %x\n ", sub_addr);
334 
335                         sub_addr = base + re;   /* re sub blk */
336                         /* FIXME: rc is never used/checked */
337                         rc = readw (io_mem + sub_addr); /* next sub blk */
338 
339                         sub_addr += 2;
340                         re_id = readw (io_mem + sub_addr);      /* sub blk id */
341 
342                         sub_addr += 2;
343                         if (re_id != 0x5245)
344                                 goto error_nodev;
345 
346                         /* signature of re */
347                         num_entries = readw (io_mem + sub_addr);
348 
349                         sub_addr += 2;  /* offset of RSRC_ENTRIES blk */
350                         rsrc_list_ptr = alloc_ebda_rsrc_list ();
351                         if (!rsrc_list_ptr ) {
352                                 rc = -ENOMEM;
353                                 goto out;
354                         }
355                         rsrc_list_ptr->format = format;
356                         rsrc_list_ptr->num_entries = num_entries;
357                         rsrc_list_ptr->phys_addr = sub_addr;
358 
359                         debug ("info about rsrc descriptor---\n");
360                         debug ("format: %x\n", format);
361                         debug ("num of rsrc: %x\n", num_entries);
362                         debug ("offset of rsrc data structure entries: %x\n ", sub_addr);
363 
364                         hs_complete = 1;
365                 } else {
366                 /* found rio table, blk_id == 0x4752 */
367                         debug ("now enter io table ---\n");
368                         debug ("rio blk id: %x\n", blk_id);
369 
370                         rio_table_ptr = kzalloc(sizeof(struct rio_table_hdr), GFP_KERNEL);
371                         if (!rio_table_ptr) {
372                                 rc = -ENOMEM;
373                                 goto out;
374                         }
375                         rio_table_ptr->ver_num = readb (io_mem + offset);
376                         rio_table_ptr->scal_count = readb (io_mem + offset + 1);
377                         rio_table_ptr->riodev_count = readb (io_mem + offset + 2);
378                         rio_table_ptr->offset = offset +3 ;
379 
380                         debug("info about rio table hdr ---\n");
381                         debug("ver_num: %x\nscal_count: %x\nriodev_count: %x\noffset of rio table: %x\n ",
382                                 rio_table_ptr->ver_num, rio_table_ptr->scal_count,
383                                 rio_table_ptr->riodev_count, rio_table_ptr->offset);
384 
385                         rio_complete = 1;
386                 }
387         }
388 
389         if (!hs_complete && !rio_complete)
390                 goto error_nodev;
391 
392         if (rio_table_ptr) {
393                 if (rio_complete && rio_table_ptr->ver_num == 3) {
394                         rc = ebda_rio_table ();
395                         if (rc)
396                                 goto out;
397                 }
398         }
399         rc = ebda_rsrc_controller ();
400         if (rc)
401                 goto out;
402 
403         rc = ebda_rsrc_rsrc ();
404         goto out;
405 error_nodev:
406         rc = -ENODEV;
407 out:
408         iounmap (io_mem);
409         return rc;
410 }
411 
412 /*
413  * map info of scalability details and rio details from physical address
414  */
415 static int __init ebda_rio_table (void)
416 {
417         u16 offset;
418         u8 i;
419         struct rio_detail *rio_detail_ptr;
420 
421         offset = rio_table_ptr->offset;
422         offset += 12 * rio_table_ptr->scal_count;
423 
424         // we do concern about rio details
425         for (i = 0; i < rio_table_ptr->riodev_count; i++) {
426                 rio_detail_ptr = kzalloc(sizeof(struct rio_detail), GFP_KERNEL);
427                 if (!rio_detail_ptr)
428                         return -ENOMEM;
429                 rio_detail_ptr->rio_node_id = readb (io_mem + offset);
430                 rio_detail_ptr->bbar = readl (io_mem + offset + 1);
431                 rio_detail_ptr->rio_type = readb (io_mem + offset + 5);
432                 rio_detail_ptr->owner_id = readb (io_mem + offset + 6);
433                 rio_detail_ptr->port0_node_connect = readb (io_mem + offset + 7);
434                 rio_detail_ptr->port0_port_connect = readb (io_mem + offset + 8);
435                 rio_detail_ptr->port1_node_connect = readb (io_mem + offset + 9);
436                 rio_detail_ptr->port1_port_connect = readb (io_mem + offset + 10);
437                 rio_detail_ptr->first_slot_num = readb (io_mem + offset + 11);
438                 rio_detail_ptr->status = readb (io_mem + offset + 12);
439                 rio_detail_ptr->wpindex = readb (io_mem + offset + 13);
440                 rio_detail_ptr->chassis_num = readb (io_mem + offset + 14);
441 //              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);
442                 //create linked list of chassis
443                 if (rio_detail_ptr->rio_type == 4 || rio_detail_ptr->rio_type == 5)
444                         list_add (&rio_detail_ptr->rio_detail_list, &rio_vg_head);
445                 //create linked list of expansion box
446                 else if (rio_detail_ptr->rio_type == 6 || rio_detail_ptr->rio_type == 7)
447                         list_add (&rio_detail_ptr->rio_detail_list, &rio_lo_head);
448                 else
449                         // not in my concern
450                         kfree (rio_detail_ptr);
451                 offset += 15;
452         }
453         print_lo_info ();
454         print_vg_info ();
455         return 0;
456 }
457 
458 /*
459  * reorganizing linked list of chassis
460  */
461 static struct opt_rio *search_opt_vg (u8 chassis_num)
462 {
463         struct opt_rio *ptr;
464         list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) {
465                 if (ptr->chassis_num == chassis_num)
466                         return ptr;
467         }
468         return NULL;
469 }
470 
471 static int __init combine_wpg_for_chassis (void)
472 {
473         struct opt_rio *opt_rio_ptr = NULL;
474         struct rio_detail *rio_detail_ptr = NULL;
475 
476         list_for_each_entry(rio_detail_ptr, &rio_vg_head, rio_detail_list) {
477                 opt_rio_ptr = search_opt_vg (rio_detail_ptr->chassis_num);
478                 if (!opt_rio_ptr) {
479                         opt_rio_ptr = kzalloc(sizeof(struct opt_rio), GFP_KERNEL);
480                         if (!opt_rio_ptr)
481                                 return -ENOMEM;
482                         opt_rio_ptr->rio_type = rio_detail_ptr->rio_type;
483                         opt_rio_ptr->chassis_num = rio_detail_ptr->chassis_num;
484                         opt_rio_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
485                         opt_rio_ptr->middle_num = rio_detail_ptr->first_slot_num;
486                         list_add (&opt_rio_ptr->opt_rio_list, &opt_vg_head);
487                 } else {
488                         opt_rio_ptr->first_slot_num = min (opt_rio_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
489                         opt_rio_ptr->middle_num = max (opt_rio_ptr->middle_num, rio_detail_ptr->first_slot_num);
490                 }
491         }
492         print_opt_vg ();
493         return 0;
494 }
495 
496 /*
497  * reorganizing linked list of expansion box
498  */
499 static struct opt_rio_lo *search_opt_lo (u8 chassis_num)
500 {
501         struct opt_rio_lo *ptr;
502         list_for_each_entry(ptr, &opt_lo_head, opt_rio_lo_list) {
503                 if (ptr->chassis_num == chassis_num)
504                         return ptr;
505         }
506         return NULL;
507 }
508 
509 static int combine_wpg_for_expansion (void)
510 {
511         struct opt_rio_lo *opt_rio_lo_ptr = NULL;
512         struct rio_detail *rio_detail_ptr = NULL;
513 
514         list_for_each_entry(rio_detail_ptr, &rio_lo_head, rio_detail_list) {
515                 opt_rio_lo_ptr = search_opt_lo (rio_detail_ptr->chassis_num);
516                 if (!opt_rio_lo_ptr) {
517                         opt_rio_lo_ptr = kzalloc(sizeof(struct opt_rio_lo), GFP_KERNEL);
518                         if (!opt_rio_lo_ptr)
519                                 return -ENOMEM;
520                         opt_rio_lo_ptr->rio_type = rio_detail_ptr->rio_type;
521                         opt_rio_lo_ptr->chassis_num = rio_detail_ptr->chassis_num;
522                         opt_rio_lo_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
523                         opt_rio_lo_ptr->middle_num = rio_detail_ptr->first_slot_num;
524                         opt_rio_lo_ptr->pack_count = 1;
525 
526                         list_add (&opt_rio_lo_ptr->opt_rio_lo_list, &opt_lo_head);
527                 } else {
528                         opt_rio_lo_ptr->first_slot_num = min (opt_rio_lo_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
529                         opt_rio_lo_ptr->middle_num = max (opt_rio_lo_ptr->middle_num, rio_detail_ptr->first_slot_num);
530                         opt_rio_lo_ptr->pack_count = 2;
531                 }
532         }
533         return 0;
534 }
535 
536 
537 /* Since we don't know the max slot number per each chassis, hence go
538  * through the list of all chassis to find out the range
539  * Arguments: slot_num, 1st slot number of the chassis we think we are on,
540  * var (0 = chassis, 1 = expansion box)
541  */
542 static int first_slot_num (u8 slot_num, u8 first_slot, u8 var)
543 {
544         struct opt_rio *opt_vg_ptr = NULL;
545         struct opt_rio_lo *opt_lo_ptr = NULL;
546         int rc = 0;
547 
548         if (!var) {
549                 list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) {
550                         if ((first_slot < opt_vg_ptr->first_slot_num) && (slot_num >= opt_vg_ptr->first_slot_num)) {
551                                 rc = -ENODEV;
552                                 break;
553                         }
554                 }
555         } else {
556                 list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) {
557                         if ((first_slot < opt_lo_ptr->first_slot_num) && (slot_num >= opt_lo_ptr->first_slot_num)) {
558                                 rc = -ENODEV;
559                                 break;
560                         }
561                 }
562         }
563         return rc;
564 }
565 
566 static struct opt_rio_lo * find_rxe_num (u8 slot_num)
567 {
568         struct opt_rio_lo *opt_lo_ptr;
569 
570         list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) {
571                 //check to see if this slot_num belongs to expansion box
572                 if ((slot_num >= opt_lo_ptr->first_slot_num) && (!first_slot_num (slot_num, opt_lo_ptr->first_slot_num, 1)))
573                         return opt_lo_ptr;
574         }
575         return NULL;
576 }
577 
578 static struct opt_rio * find_chassis_num (u8 slot_num)
579 {
580         struct opt_rio *opt_vg_ptr;
581 
582         list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) {
583                 //check to see if this slot_num belongs to chassis
584                 if ((slot_num >= opt_vg_ptr->first_slot_num) && (!first_slot_num (slot_num, opt_vg_ptr->first_slot_num, 0)))
585                         return opt_vg_ptr;
586         }
587         return NULL;
588 }
589 
590 /* This routine will find out how many slots are in the chassis, so that
591  * the slot numbers for rxe100 would start from 1, and not from 7, or 6 etc
592  */
593 static u8 calculate_first_slot (u8 slot_num)
594 {
595         u8 first_slot = 1;
596         struct slot * slot_cur;
597 
598         list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
599                 if (slot_cur->ctrl) {
600                         if ((slot_cur->ctrl->ctlr_type != 4) && (slot_cur->ctrl->ending_slot_num > first_slot) && (slot_num > slot_cur->ctrl->ending_slot_num))
601                                 first_slot = slot_cur->ctrl->ending_slot_num;
602                 }
603         }
604         return first_slot + 1;
605 
606 }
607 
608 #define SLOT_NAME_SIZE 30
609 
610 static char *create_file_name (struct slot * slot_cur)
611 {
612         struct opt_rio *opt_vg_ptr = NULL;
613         struct opt_rio_lo *opt_lo_ptr = NULL;
614         static char str[SLOT_NAME_SIZE];
615         int which = 0; /* rxe = 1, chassis = 0 */
616         u8 number = 1; /* either chassis or rxe # */
617         u8 first_slot = 1;
618         u8 slot_num;
619         u8 flag = 0;
620 
621         if (!slot_cur) {
622                 err ("Structure passed is empty\n");
623                 return NULL;
624         }
625 
626         slot_num = slot_cur->number;
627 
628         memset (str, 0, sizeof(str));
629 
630         if (rio_table_ptr) {
631                 if (rio_table_ptr->ver_num == 3) {
632                         opt_vg_ptr = find_chassis_num (slot_num);
633                         opt_lo_ptr = find_rxe_num (slot_num);
634                 }
635         }
636         if (opt_vg_ptr) {
637                 if (opt_lo_ptr) {
638                         if ((slot_num - opt_vg_ptr->first_slot_num) > (slot_num - opt_lo_ptr->first_slot_num)) {
639                                 number = opt_lo_ptr->chassis_num;
640                                 first_slot = opt_lo_ptr->first_slot_num;
641                                 which = 1; /* it is RXE */
642                         } else {
643                                 first_slot = opt_vg_ptr->first_slot_num;
644                                 number = opt_vg_ptr->chassis_num;
645                                 which = 0;
646                         }
647                 } else {
648                         first_slot = opt_vg_ptr->first_slot_num;
649                         number = opt_vg_ptr->chassis_num;
650                         which = 0;
651                 }
652                 ++flag;
653         } else if (opt_lo_ptr) {
654                 number = opt_lo_ptr->chassis_num;
655                 first_slot = opt_lo_ptr->first_slot_num;
656                 which = 1;
657                 ++flag;
658         } else if (rio_table_ptr) {
659                 if (rio_table_ptr->ver_num == 3) {
660                         /* if both NULL and we DO have correct RIO table in BIOS */
661                         return NULL;
662                 }
663         }
664         if (!flag) {
665                 if (slot_cur->ctrl->ctlr_type == 4) {
666                         first_slot = calculate_first_slot (slot_num);
667                         which = 1;
668                 } else {
669                         which = 0;
670                 }
671         }
672 
673         sprintf(str, "%s%dslot%d",
674                 which == 0 ? "chassis" : "rxe",
675                 number, slot_num - first_slot + 1);
676         return str;
677 }
678 
679 static int fillslotinfo(struct hotplug_slot *hotplug_slot)
680 {
681         struct slot *slot;
682         int rc = 0;
683 
684         if (!hotplug_slot || !hotplug_slot->private)
685                 return -EINVAL;
686 
687         slot = hotplug_slot->private;
688         rc = ibmphp_hpc_readslot(slot, READ_ALLSTAT, NULL);
689         if (rc)
690                 return rc;
691 
692         // power - enabled:1  not:0
693         hotplug_slot->info->power_status = SLOT_POWER(slot->status);
694 
695         // attention - off:0, on:1, blinking:2
696         hotplug_slot->info->attention_status = SLOT_ATTN(slot->status, slot->ext_status);
697 
698         // latch - open:1 closed:0
699         hotplug_slot->info->latch_status = SLOT_LATCH(slot->status);
700 
701         // pci board - present:1 not:0
702         if (SLOT_PRESENT (slot->status))
703                 hotplug_slot->info->adapter_status = 1;
704         else
705                 hotplug_slot->info->adapter_status = 0;
706 /*
707         if (slot->bus_on->supported_bus_mode
708                 && (slot->bus_on->supported_speed == BUS_SPEED_66))
709                 hotplug_slot->info->max_bus_speed_status = BUS_SPEED_66PCIX;
710         else
711                 hotplug_slot->info->max_bus_speed_status = slot->bus_on->supported_speed;
712 */
713 
714         return rc;
715 }
716 
717 static void release_slot(struct hotplug_slot *hotplug_slot)
718 {
719         struct slot *slot;
720 
721         if (!hotplug_slot || !hotplug_slot->private)
722                 return;
723 
724         slot = hotplug_slot->private;
725         kfree(slot->hotplug_slot->info);
726         kfree(slot->hotplug_slot);
727         slot->ctrl = NULL;
728         slot->bus_on = NULL;
729 
730         /* we don't want to actually remove the resources, since free_resources will do just that */
731         ibmphp_unconfigure_card(&slot, -1);
732 
733         kfree (slot);
734 }
735 
736 static struct pci_driver ibmphp_driver;
737 
738 /*
739  * map info (ctlr-id, slot count, slot#.. bus count, bus#, ctlr type...) of
740  * each hpc from physical address to a list of hot plug controllers based on
741  * hpc descriptors.
742  */
743 static int __init ebda_rsrc_controller (void)
744 {
745         u16 addr, addr_slot, addr_bus;
746         u8 ctlr_id, temp, bus_index;
747         u16 ctlr, slot, bus;
748         u16 slot_num, bus_num, index;
749         struct hotplug_slot *hp_slot_ptr;
750         struct controller *hpc_ptr;
751         struct ebda_hpc_bus *bus_ptr;
752         struct ebda_hpc_slot *slot_ptr;
753         struct bus_info *bus_info_ptr1, *bus_info_ptr2;
754         int rc;
755         struct slot *tmp_slot;
756         char name[SLOT_NAME_SIZE];
757 
758         addr = hpc_list_ptr->phys_addr;
759         for (ctlr = 0; ctlr < hpc_list_ptr->num_ctlrs; ctlr++) {
760                 bus_index = 1;
761                 ctlr_id = readb (io_mem + addr);
762                 addr += 1;
763                 slot_num = readb (io_mem + addr);
764 
765                 addr += 1;
766                 addr_slot = addr;       /* offset of slot structure */
767                 addr += (slot_num * 4);
768 
769                 bus_num = readb (io_mem + addr);
770 
771                 addr += 1;
772                 addr_bus = addr;        /* offset of bus */
773                 addr += (bus_num * 9);  /* offset of ctlr_type */
774                 temp = readb (io_mem + addr);
775 
776                 addr += 1;
777                 /* init hpc structure */
778                 hpc_ptr = alloc_ebda_hpc (slot_num, bus_num);
779                 if (!hpc_ptr ) {
780                         rc = -ENOMEM;
781                         goto error_no_hpc;
782                 }
783                 hpc_ptr->ctlr_id = ctlr_id;
784                 hpc_ptr->ctlr_relative_id = ctlr;
785                 hpc_ptr->slot_count = slot_num;
786                 hpc_ptr->bus_count = bus_num;
787                 debug ("now enter ctlr data structure ---\n");
788                 debug ("ctlr id: %x\n", ctlr_id);
789                 debug ("ctlr_relative_id: %x\n", hpc_ptr->ctlr_relative_id);
790                 debug ("count of slots controlled by this ctlr: %x\n", slot_num);
791                 debug ("count of buses controlled by this ctlr: %x\n", bus_num);
792 
793                 /* init slot structure, fetch slot, bus, cap... */
794                 slot_ptr = hpc_ptr->slots;
795                 for (slot = 0; slot < slot_num; slot++) {
796                         slot_ptr->slot_num = readb (io_mem + addr_slot);
797                         slot_ptr->slot_bus_num = readb (io_mem + addr_slot + slot_num);
798                         slot_ptr->ctl_index = readb (io_mem + addr_slot + 2*slot_num);
799                         slot_ptr->slot_cap = readb (io_mem + addr_slot + 3*slot_num);
800 
801                         // create bus_info lined list --- if only one slot per bus: slot_min = slot_max
802 
803                         bus_info_ptr2 = ibmphp_find_same_bus_num (slot_ptr->slot_bus_num);
804                         if (!bus_info_ptr2) {
805                                 bus_info_ptr1 = kzalloc(sizeof(struct bus_info), GFP_KERNEL);
806                                 if (!bus_info_ptr1) {
807                                         rc = -ENOMEM;
808                                         goto error_no_hp_slot;
809                                 }
810                                 bus_info_ptr1->slot_min = slot_ptr->slot_num;
811                                 bus_info_ptr1->slot_max = slot_ptr->slot_num;
812                                 bus_info_ptr1->slot_count += 1;
813                                 bus_info_ptr1->busno = slot_ptr->slot_bus_num;
814                                 bus_info_ptr1->index = bus_index++;
815                                 bus_info_ptr1->current_speed = 0xff;
816                                 bus_info_ptr1->current_bus_mode = 0xff;
817 
818                                 bus_info_ptr1->controller_id = hpc_ptr->ctlr_id;
819 
820                                 list_add_tail (&bus_info_ptr1->bus_info_list, &bus_info_head);
821 
822                         } else {
823                                 bus_info_ptr2->slot_min = min (bus_info_ptr2->slot_min, slot_ptr->slot_num);
824                                 bus_info_ptr2->slot_max = max (bus_info_ptr2->slot_max, slot_ptr->slot_num);
825                                 bus_info_ptr2->slot_count += 1;
826 
827                         }
828 
829                         // end of creating the bus_info linked list
830 
831                         slot_ptr++;
832                         addr_slot += 1;
833                 }
834 
835                 /* init bus structure */
836                 bus_ptr = hpc_ptr->buses;
837                 for (bus = 0; bus < bus_num; bus++) {
838                         bus_ptr->bus_num = readb (io_mem + addr_bus + bus);
839                         bus_ptr->slots_at_33_conv = readb (io_mem + addr_bus + bus_num + 8 * bus);
840                         bus_ptr->slots_at_66_conv = readb (io_mem + addr_bus + bus_num + 8 * bus + 1);
841 
842                         bus_ptr->slots_at_66_pcix = readb (io_mem + addr_bus + bus_num + 8 * bus + 2);
843 
844                         bus_ptr->slots_at_100_pcix = readb (io_mem + addr_bus + bus_num + 8 * bus + 3);
845 
846                         bus_ptr->slots_at_133_pcix = readb (io_mem + addr_bus + bus_num + 8 * bus + 4);
847 
848                         bus_info_ptr2 = ibmphp_find_same_bus_num (bus_ptr->bus_num);
849                         if (bus_info_ptr2) {
850                                 bus_info_ptr2->slots_at_33_conv = bus_ptr->slots_at_33_conv;
851                                 bus_info_ptr2->slots_at_66_conv = bus_ptr->slots_at_66_conv;
852                                 bus_info_ptr2->slots_at_66_pcix = bus_ptr->slots_at_66_pcix;
853                                 bus_info_ptr2->slots_at_100_pcix = bus_ptr->slots_at_100_pcix;
854                                 bus_info_ptr2->slots_at_133_pcix = bus_ptr->slots_at_133_pcix;
855                         }
856                         bus_ptr++;
857                 }
858 
859                 hpc_ptr->ctlr_type = temp;
860 
861                 switch (hpc_ptr->ctlr_type) {
862                         case 1:
863                                 hpc_ptr->u.pci_ctlr.bus = readb (io_mem + addr);
864                                 hpc_ptr->u.pci_ctlr.dev_fun = readb (io_mem + addr + 1);
865                                 hpc_ptr->irq = readb (io_mem + addr + 2);
866                                 addr += 3;
867                                 debug ("ctrl bus = %x, ctlr devfun = %x, irq = %x\n",
868                                         hpc_ptr->u.pci_ctlr.bus,
869                                         hpc_ptr->u.pci_ctlr.dev_fun, hpc_ptr->irq);
870                                 break;
871 
872                         case 0:
873                                 hpc_ptr->u.isa_ctlr.io_start = readw (io_mem + addr);
874                                 hpc_ptr->u.isa_ctlr.io_end = readw (io_mem + addr + 2);
875                                 if (!request_region (hpc_ptr->u.isa_ctlr.io_start,
876                                                      (hpc_ptr->u.isa_ctlr.io_end - hpc_ptr->u.isa_ctlr.io_start + 1),
877                                                      "ibmphp")) {
878                                         rc = -ENODEV;
879                                         goto error_no_hp_slot;
880                                 }
881                                 hpc_ptr->irq = readb (io_mem + addr + 4);
882                                 addr += 5;
883                                 break;
884 
885                         case 2:
886                         case 4:
887                                 hpc_ptr->u.wpeg_ctlr.wpegbbar = readl (io_mem + addr);
888                                 hpc_ptr->u.wpeg_ctlr.i2c_addr = readb (io_mem + addr + 4);
889                                 hpc_ptr->irq = readb (io_mem + addr + 5);
890                                 addr += 6;
891                                 break;
892                         default:
893                                 rc = -ENODEV;
894                                 goto error_no_hp_slot;
895                 }
896 
897                 //reorganize chassis' linked list
898                 combine_wpg_for_chassis ();
899                 combine_wpg_for_expansion ();
900                 hpc_ptr->revision = 0xff;
901                 hpc_ptr->options = 0xff;
902                 hpc_ptr->starting_slot_num = hpc_ptr->slots[0].slot_num;
903                 hpc_ptr->ending_slot_num = hpc_ptr->slots[slot_num-1].slot_num;
904 
905                 // register slots with hpc core as well as create linked list of ibm slot
906                 for (index = 0; index < hpc_ptr->slot_count; index++) {
907 
908                         hp_slot_ptr = kzalloc(sizeof(*hp_slot_ptr), GFP_KERNEL);
909                         if (!hp_slot_ptr) {
910                                 rc = -ENOMEM;
911                                 goto error_no_hp_slot;
912                         }
913 
914                         hp_slot_ptr->info = kzalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
915                         if (!hp_slot_ptr->info) {
916                                 rc = -ENOMEM;
917                                 goto error_no_hp_info;
918                         }
919 
920                         tmp_slot = kzalloc(sizeof(*tmp_slot), GFP_KERNEL);
921                         if (!tmp_slot) {
922                                 rc = -ENOMEM;
923                                 goto error_no_slot;
924                         }
925 
926                         tmp_slot->flag = 1;
927 
928                         tmp_slot->capabilities = hpc_ptr->slots[index].slot_cap;
929                         if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_133_MAX) == EBDA_SLOT_133_MAX)
930                                 tmp_slot->supported_speed =  3;
931                         else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_100_MAX) == EBDA_SLOT_100_MAX)
932                                 tmp_slot->supported_speed =  2;
933                         else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_66_MAX) == EBDA_SLOT_66_MAX)
934                                 tmp_slot->supported_speed =  1;
935 
936                         if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_PCIX_CAP) == EBDA_SLOT_PCIX_CAP)
937                                 tmp_slot->supported_bus_mode = 1;
938                         else
939                                 tmp_slot->supported_bus_mode = 0;
940 
941 
942                         tmp_slot->bus = hpc_ptr->slots[index].slot_bus_num;
943 
944                         bus_info_ptr1 = ibmphp_find_same_bus_num (hpc_ptr->slots[index].slot_bus_num);
945                         if (!bus_info_ptr1) {
946                                 kfree(tmp_slot);
947                                 rc = -ENODEV;
948                                 goto error;
949                         }
950                         tmp_slot->bus_on = bus_info_ptr1;
951                         bus_info_ptr1 = NULL;
952                         tmp_slot->ctrl = hpc_ptr;
953 
954                         tmp_slot->ctlr_index = hpc_ptr->slots[index].ctl_index;
955                         tmp_slot->number = hpc_ptr->slots[index].slot_num;
956                         tmp_slot->hotplug_slot = hp_slot_ptr;
957 
958                         hp_slot_ptr->private = tmp_slot;
959                         hp_slot_ptr->release = release_slot;
960 
961                         rc = fillslotinfo(hp_slot_ptr);
962                         if (rc)
963                                 goto error;
964 
965                         rc = ibmphp_init_devno ((struct slot **) &hp_slot_ptr->private);
966                         if (rc)
967                                 goto error;
968                         hp_slot_ptr->ops = &ibmphp_hotplug_slot_ops;
969 
970                         // end of registering ibm slot with hotplug core
971 
972                         list_add (& ((struct slot *)(hp_slot_ptr->private))->ibm_slot_list, &ibmphp_slot_head);
973                 }
974 
975                 print_bus_info ();
976                 list_add (&hpc_ptr->ebda_hpc_list, &ebda_hpc_head );
977 
978         }                       /* each hpc  */
979 
980         list_for_each_entry(tmp_slot, &ibmphp_slot_head, ibm_slot_list) {
981                 snprintf(name, SLOT_NAME_SIZE, "%s", create_file_name(tmp_slot));
982                 pci_hp_register(tmp_slot->hotplug_slot,
983                         pci_find_bus(0, tmp_slot->bus), tmp_slot->device, name);
984         }
985 
986         print_ebda_hpc ();
987         print_ibm_slot ();
988         return 0;
989 
990 error:
991         kfree (hp_slot_ptr->private);
992 error_no_slot:
993         kfree (hp_slot_ptr->info);
994 error_no_hp_info:
995         kfree (hp_slot_ptr);
996 error_no_hp_slot:
997         free_ebda_hpc (hpc_ptr);
998 error_no_hpc:
999         iounmap (io_mem);
1000         return rc;
1001 }
1002 
1003 /*
1004  * map info (bus, devfun, start addr, end addr..) of i/o, memory,
1005  * pfm from the physical addr to a list of resource.
1006  */
1007 static int __init ebda_rsrc_rsrc (void)
1008 {
1009         u16 addr;
1010         short rsrc;
1011         u8 type, rsrc_type;
1012         struct ebda_pci_rsrc *rsrc_ptr;
1013 
1014         addr = rsrc_list_ptr->phys_addr;
1015         debug ("now entering rsrc land\n");
1016         debug ("offset of rsrc: %x\n", rsrc_list_ptr->phys_addr);
1017 
1018         for (rsrc = 0; rsrc < rsrc_list_ptr->num_entries; rsrc++) {
1019                 type = readb (io_mem + addr);
1020 
1021                 addr += 1;
1022                 rsrc_type = type & EBDA_RSRC_TYPE_MASK;
1023 
1024                 if (rsrc_type == EBDA_IO_RSRC_TYPE) {
1025                         rsrc_ptr = alloc_ebda_pci_rsrc ();
1026                         if (!rsrc_ptr) {
1027                                 iounmap (io_mem);
1028                                 return -ENOMEM;
1029                         }
1030                         rsrc_ptr->rsrc_type = type;
1031 
1032                         rsrc_ptr->bus_num = readb (io_mem + addr);
1033                         rsrc_ptr->dev_fun = readb (io_mem + addr + 1);
1034                         rsrc_ptr->start_addr = readw (io_mem + addr + 2);
1035                         rsrc_ptr->end_addr = readw (io_mem + addr + 4);
1036                         addr += 6;
1037 
1038                         debug ("rsrc from io type ----\n");
1039                         debug ("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
1040                                 rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
1041 
1042                         list_add (&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
1043                 }
1044 
1045                 if (rsrc_type == EBDA_MEM_RSRC_TYPE || rsrc_type == EBDA_PFM_RSRC_TYPE) {
1046                         rsrc_ptr = alloc_ebda_pci_rsrc ();
1047                         if (!rsrc_ptr ) {
1048                                 iounmap (io_mem);
1049                                 return -ENOMEM;
1050                         }
1051                         rsrc_ptr->rsrc_type = type;
1052 
1053                         rsrc_ptr->bus_num = readb (io_mem + addr);
1054                         rsrc_ptr->dev_fun = readb (io_mem + addr + 1);
1055                         rsrc_ptr->start_addr = readl (io_mem + addr + 2);
1056                         rsrc_ptr->end_addr = readl (io_mem + addr + 6);
1057                         addr += 10;
1058 
1059                         debug ("rsrc from mem or pfm ---\n");
1060                         debug ("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
1061                                 rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
1062 
1063                         list_add (&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
1064                 }
1065         }
1066         kfree (rsrc_list_ptr);
1067         rsrc_list_ptr = NULL;
1068         print_ebda_pci_rsrc ();
1069         return 0;
1070 }
1071 
1072 u16 ibmphp_get_total_controllers (void)
1073 {
1074         return hpc_list_ptr->num_ctlrs;
1075 }
1076 
1077 struct slot *ibmphp_get_slot_from_physical_num (u8 physical_num)
1078 {
1079         struct slot *slot;
1080 
1081         list_for_each_entry(slot, &ibmphp_slot_head, ibm_slot_list) {
1082                 if (slot->number == physical_num)
1083                         return slot;
1084         }
1085         return NULL;
1086 }
1087 
1088 /* To find:
1089  *      - the smallest slot number
1090  *      - the largest slot number
1091  *      - the total number of the slots based on each bus
1092  *        (if only one slot per bus slot_min = slot_max )
1093  */
1094 struct bus_info *ibmphp_find_same_bus_num (u32 num)
1095 {
1096         struct bus_info *ptr;
1097 
1098         list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
1099                 if (ptr->busno == num)
1100                          return ptr;
1101         }
1102         return NULL;
1103 }
1104 
1105 /*  Finding relative bus number, in order to map corresponding
1106  *  bus register
1107  */
1108 int ibmphp_get_bus_index (u8 num)
1109 {
1110         struct bus_info *ptr;
1111 
1112         list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
1113                 if (ptr->busno == num)
1114                         return ptr->index;
1115         }
1116         return -ENODEV;
1117 }
1118 
1119 void ibmphp_free_bus_info_queue (void)
1120 {
1121         struct bus_info *bus_info;
1122         struct list_head *list;
1123         struct list_head *next;
1124 
1125         list_for_each_safe (list, next, &bus_info_head ) {
1126                 bus_info = list_entry (list, struct bus_info, bus_info_list);
1127                 kfree (bus_info);
1128         }
1129 }
1130 
1131 void ibmphp_free_ebda_hpc_queue (void)
1132 {
1133         struct controller *controller = NULL;
1134         struct list_head *list;
1135         struct list_head *next;
1136         int pci_flag = 0;
1137 
1138         list_for_each_safe (list, next, &ebda_hpc_head) {
1139                 controller = list_entry (list, struct controller, ebda_hpc_list);
1140                 if (controller->ctlr_type == 0)
1141                         release_region (controller->u.isa_ctlr.io_start, (controller->u.isa_ctlr.io_end - controller->u.isa_ctlr.io_start + 1));
1142                 else if ((controller->ctlr_type == 1) && (!pci_flag)) {
1143                         ++pci_flag;
1144                         pci_unregister_driver (&ibmphp_driver);
1145                 }
1146                 free_ebda_hpc (controller);
1147         }
1148 }
1149 
1150 void ibmphp_free_ebda_pci_rsrc_queue (void)
1151 {
1152         struct ebda_pci_rsrc *resource;
1153         struct list_head *list;
1154         struct list_head *next;
1155 
1156         list_for_each_safe (list, next, &ibmphp_ebda_pci_rsrc_head) {
1157                 resource = list_entry (list, struct ebda_pci_rsrc, ebda_pci_rsrc_list);
1158                 kfree (resource);
1159                 resource = NULL;
1160         }
1161 }
1162 
1163 static struct pci_device_id id_table[] = {
1164         {
1165                 .vendor         = PCI_VENDOR_ID_IBM,
1166                 .device         = HPC_DEVICE_ID,
1167                 .subvendor      = PCI_VENDOR_ID_IBM,
1168                 .subdevice      = HPC_SUBSYSTEM_ID,
1169                 .class          = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
1170         }, {}
1171 };
1172 
1173 MODULE_DEVICE_TABLE(pci, id_table);
1174 
1175 static int ibmphp_probe (struct pci_dev *, const struct pci_device_id *);
1176 static struct pci_driver ibmphp_driver = {
1177         .name           = "ibmphp",
1178         .id_table       = id_table,
1179         .probe          = ibmphp_probe,
1180 };
1181 
1182 int ibmphp_register_pci (void)
1183 {
1184         struct controller *ctrl;
1185         int rc = 0;
1186 
1187         list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
1188                 if (ctrl->ctlr_type == 1) {
1189                         rc = pci_register_driver(&ibmphp_driver);
1190                         break;
1191                 }
1192         }
1193         return rc;
1194 }
1195 static int ibmphp_probe (struct pci_dev * dev, const struct pci_device_id *ids)
1196 {
1197         struct controller *ctrl;
1198 
1199         debug ("inside ibmphp_probe\n");
1200 
1201         list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
1202                 if (ctrl->ctlr_type == 1) {
1203                         if ((dev->devfn == ctrl->u.pci_ctlr.dev_fun) && (dev->bus->number == ctrl->u.pci_ctlr.bus)) {
1204                                 ctrl->ctrl_dev = dev;
1205                                 debug ("found device!!!\n");
1206                                 debug ("dev->device = %x, dev->subsystem_device = %x\n", dev->device, dev->subsystem_device);
1207                                 return 0;
1208                         }
1209                 }
1210         }
1211         return -ENODEV;
1212 }
1213 

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