Version:  2.0.40 2.2.26 2.4.37 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 3.15 3.16 3.17 3.18

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                 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 
245 int __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;
404 error_nodev:
405         rc = -ENODEV;
406 out:
407         iounmap (io_mem);
408         return rc;
409 }
410 
411 /*
412  * map info of scalability details and rio details from physical address
413  */
414 static 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  */
460 static 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 
470 static 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  */
498 static 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 
508 static 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  */
541 static 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 
565 static 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 
577 static 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  */
592 static 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 
609 static 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 
678 static 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 
716 static 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 
735 static 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  */
742 static 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 
989 error:
990         kfree (hp_slot_ptr->private);
991 error_no_slot:
992         kfree (hp_slot_ptr->info);
993 error_no_hp_info:
994         kfree (hp_slot_ptr);
995 error_no_hp_slot:
996         free_ebda_hpc (hpc_ptr);
997 error_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  */
1006 static 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 
1071 u16 ibmphp_get_total_controllers (void)
1072 {
1073         return hpc_list_ptr->num_ctlrs;
1074 }
1075 
1076 struct 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  */
1093 struct 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  */
1107 int 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 
1118 void ibmphp_free_bus_info_queue (void)
1119 {
1120         struct bus_info *bus_info;
1121         struct list_head *list;
1122         struct list_head *next;
1123 
1124         list_for_each_safe (list, next, &bus_info_head ) {
1125                 bus_info = list_entry (list, struct bus_info, bus_info_list);
1126                 kfree (bus_info);
1127         }
1128 }
1129 
1130 void ibmphp_free_ebda_hpc_queue (void)
1131 {
1132         struct controller *controller = NULL;
1133         struct list_head *list;
1134         struct list_head *next;
1135         int pci_flag = 0;
1136 
1137         list_for_each_safe (list, next, &ebda_hpc_head) {
1138                 controller = list_entry (list, struct controller, ebda_hpc_list);
1139                 if (controller->ctlr_type == 0)
1140                         release_region (controller->u.isa_ctlr.io_start, (controller->u.isa_ctlr.io_end - controller->u.isa_ctlr.io_start + 1));
1141                 else if ((controller->ctlr_type == 1) && (!pci_flag)) {
1142                         ++pci_flag;
1143                         pci_unregister_driver (&ibmphp_driver);
1144                 }
1145                 free_ebda_hpc (controller);
1146         }
1147 }
1148 
1149 void ibmphp_free_ebda_pci_rsrc_queue (void)
1150 {
1151         struct ebda_pci_rsrc *resource;
1152         struct list_head *list;
1153         struct list_head *next;
1154 
1155         list_for_each_safe (list, next, &ibmphp_ebda_pci_rsrc_head) {
1156                 resource = list_entry (list, struct ebda_pci_rsrc, ebda_pci_rsrc_list);
1157                 kfree (resource);
1158                 resource = NULL;
1159         }
1160 }
1161 
1162 static struct pci_device_id id_table[] = {
1163         {
1164                 .vendor         = PCI_VENDOR_ID_IBM,
1165                 .device         = HPC_DEVICE_ID,
1166                 .subvendor      = PCI_VENDOR_ID_IBM,
1167                 .subdevice      = HPC_SUBSYSTEM_ID,
1168                 .class          = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
1169         }, {}
1170 };
1171 
1172 MODULE_DEVICE_TABLE(pci, id_table);
1173 
1174 static int ibmphp_probe (struct pci_dev *, const struct pci_device_id *);
1175 static struct pci_driver ibmphp_driver = {
1176         .name           = "ibmphp",
1177         .id_table       = id_table,
1178         .probe          = ibmphp_probe,
1179 };
1180 
1181 int ibmphp_register_pci (void)
1182 {
1183         struct controller *ctrl;
1184         int rc = 0;
1185 
1186         list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
1187                 if (ctrl->ctlr_type == 1) {
1188                         rc = pci_register_driver(&ibmphp_driver);
1189                         break;
1190                 }
1191         }
1192         return rc;
1193 }
1194 static int ibmphp_probe (struct pci_dev *dev, const struct pci_device_id *ids)
1195 {
1196         struct controller *ctrl;
1197 
1198         debug ("inside ibmphp_probe\n");
1199 
1200         list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
1201                 if (ctrl->ctlr_type == 1) {
1202                         if ((dev->devfn == ctrl->u.pci_ctlr.dev_fun) && (dev->bus->number == ctrl->u.pci_ctlr.bus)) {
1203                                 ctrl->ctrl_dev = dev;
1204                                 debug ("found device!!!\n");
1205                                 debug ("dev->device = %x, dev->subsystem_device = %x\n", dev->device, dev->subsystem_device);
1206                                 return 0;
1207                         }
1208                 }
1209         }
1210         return -ENODEV;
1211 }
1212 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us