Version:  2.0.40 2.2.26 2.4.37 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8

Linux/drivers/pci/hotplug/ibmphp_core.c

  1 /*
  2  * IBM Hot Plug Controller Driver
  3  *
  4  * Written By: Chuck Cole, Jyoti Shah, Tong Yu, Irene Zubarev, 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/init.h>
 31 #include <linux/module.h>
 32 #include <linux/slab.h>
 33 #include <linux/pci.h>
 34 #include <linux/interrupt.h>
 35 #include <linux/delay.h>
 36 #include <linux/wait.h>
 37 #include "../pci.h"
 38 #include <asm/pci_x86.h>                /* for struct irq_routing_table */
 39 #include <asm/io_apic.h>
 40 #include "ibmphp.h"
 41 
 42 #define attn_on(sl)  ibmphp_hpc_writeslot(sl, HPC_SLOT_ATTNON)
 43 #define attn_off(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_ATTNOFF)
 44 #define attn_LED_blink(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_BLINKLED)
 45 #define get_ctrl_revision(sl, rev) ibmphp_hpc_readslot(sl, READ_REVLEVEL, rev)
 46 #define get_hpc_options(sl, opt) ibmphp_hpc_readslot(sl, READ_HPCOPTIONS, opt)
 47 
 48 #define DRIVER_VERSION  "0.6"
 49 #define DRIVER_DESC     "IBM Hot Plug PCI Controller Driver"
 50 
 51 int ibmphp_debug;
 52 
 53 static bool debug;
 54 module_param(debug, bool, S_IRUGO | S_IWUSR);
 55 MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
 56 MODULE_LICENSE("GPL");
 57 MODULE_DESCRIPTION(DRIVER_DESC);
 58 
 59 struct pci_bus *ibmphp_pci_bus;
 60 static int max_slots;
 61 
 62 static int irqs[16];    /* PIC mode IRQs we're using so far (in case MPS
 63                          * tables don't provide default info for empty slots */
 64 
 65 static int init_flag;
 66 
 67 /*
 68 static int get_max_adapter_speed_1 (struct hotplug_slot *, u8 *, u8);
 69 
 70 static inline int get_max_adapter_speed (struct hotplug_slot *hs, u8 *value)
 71 {
 72         return get_max_adapter_speed_1 (hs, value, 1);
 73 }
 74 */
 75 static inline int get_cur_bus_info(struct slot **sl)
 76 {
 77         int rc = 1;
 78         struct slot *slot_cur = *sl;
 79 
 80         debug("options = %x\n", slot_cur->ctrl->options);
 81         debug("revision = %x\n", slot_cur->ctrl->revision);
 82 
 83         if (READ_BUS_STATUS(slot_cur->ctrl))
 84                 rc = ibmphp_hpc_readslot(slot_cur, READ_BUSSTATUS, NULL);
 85 
 86         if (rc)
 87                 return rc;
 88 
 89         slot_cur->bus_on->current_speed = CURRENT_BUS_SPEED(slot_cur->busstatus);
 90         if (READ_BUS_MODE(slot_cur->ctrl))
 91                 slot_cur->bus_on->current_bus_mode =
 92                                 CURRENT_BUS_MODE(slot_cur->busstatus);
 93         else
 94                 slot_cur->bus_on->current_bus_mode = 0xFF;
 95 
 96         debug("busstatus = %x, bus_speed = %x, bus_mode = %x\n",
 97                         slot_cur->busstatus,
 98                         slot_cur->bus_on->current_speed,
 99                         slot_cur->bus_on->current_bus_mode);
100 
101         *sl = slot_cur;
102         return 0;
103 }
104 
105 static inline int slot_update(struct slot **sl)
106 {
107         int rc;
108         rc = ibmphp_hpc_readslot(*sl, READ_ALLSTAT, NULL);
109         if (rc)
110                 return rc;
111         if (!init_flag)
112                 rc = get_cur_bus_info(sl);
113         return rc;
114 }
115 
116 static int __init get_max_slots(void)
117 {
118         struct slot *slot_cur;
119         u8 slot_count = 0;
120 
121         list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
122                 /* sometimes the hot-pluggable slots start with 4 (not always from 1) */
123                 slot_count = max(slot_count, slot_cur->number);
124         }
125         return slot_count;
126 }
127 
128 /* This routine will put the correct slot->device information per slot.  It's
129  * called from initialization of the slot structures. It will also assign
130  * interrupt numbers per each slot.
131  * Parameters: struct slot
132  * Returns 0 or errors
133  */
134 int ibmphp_init_devno(struct slot **cur_slot)
135 {
136         struct irq_routing_table *rtable;
137         int len;
138         int loop;
139         int i;
140 
141         rtable = pcibios_get_irq_routing_table();
142         if (!rtable) {
143                 err("no BIOS routing table...\n");
144                 return -ENOMEM;
145         }
146 
147         len = (rtable->size - sizeof(struct irq_routing_table)) /
148                         sizeof(struct irq_info);
149 
150         if (!len) {
151                 kfree(rtable);
152                 return -1;
153         }
154         for (loop = 0; loop < len; loop++) {
155                 if ((*cur_slot)->number == rtable->slots[loop].slot &&
156                     (*cur_slot)->bus == rtable->slots[loop].bus) {
157                         (*cur_slot)->device = PCI_SLOT(rtable->slots[loop].devfn);
158                         for (i = 0; i < 4; i++)
159                                 (*cur_slot)->irq[i] = IO_APIC_get_PCI_irq_vector((int) (*cur_slot)->bus,
160                                                 (int) (*cur_slot)->device, i);
161 
162                         debug("(*cur_slot)->irq[0] = %x\n",
163                                         (*cur_slot)->irq[0]);
164                         debug("(*cur_slot)->irq[1] = %x\n",
165                                         (*cur_slot)->irq[1]);
166                         debug("(*cur_slot)->irq[2] = %x\n",
167                                         (*cur_slot)->irq[2]);
168                         debug("(*cur_slot)->irq[3] = %x\n",
169                                         (*cur_slot)->irq[3]);
170 
171                         debug("rtable->exclusive_irqs = %x\n",
172                                         rtable->exclusive_irqs);
173                         debug("rtable->slots[loop].irq[0].bitmap = %x\n",
174                                         rtable->slots[loop].irq[0].bitmap);
175                         debug("rtable->slots[loop].irq[1].bitmap = %x\n",
176                                         rtable->slots[loop].irq[1].bitmap);
177                         debug("rtable->slots[loop].irq[2].bitmap = %x\n",
178                                         rtable->slots[loop].irq[2].bitmap);
179                         debug("rtable->slots[loop].irq[3].bitmap = %x\n",
180                                         rtable->slots[loop].irq[3].bitmap);
181 
182                         debug("rtable->slots[loop].irq[0].link = %x\n",
183                                         rtable->slots[loop].irq[0].link);
184                         debug("rtable->slots[loop].irq[1].link = %x\n",
185                                         rtable->slots[loop].irq[1].link);
186                         debug("rtable->slots[loop].irq[2].link = %x\n",
187                                         rtable->slots[loop].irq[2].link);
188                         debug("rtable->slots[loop].irq[3].link = %x\n",
189                                         rtable->slots[loop].irq[3].link);
190                         debug("end of init_devno\n");
191                         kfree(rtable);
192                         return 0;
193                 }
194         }
195 
196         kfree(rtable);
197         return -1;
198 }
199 
200 static inline int power_on(struct slot *slot_cur)
201 {
202         u8 cmd = HPC_SLOT_ON;
203         int retval;
204 
205         retval = ibmphp_hpc_writeslot(slot_cur, cmd);
206         if (retval) {
207                 err("power on failed\n");
208                 return retval;
209         }
210         if (CTLR_RESULT(slot_cur->ctrl->status)) {
211                 err("command not completed successfully in power_on\n");
212                 return -EIO;
213         }
214         msleep(3000);   /* For ServeRAID cards, and some 66 PCI */
215         return 0;
216 }
217 
218 static inline int power_off(struct slot *slot_cur)
219 {
220         u8 cmd = HPC_SLOT_OFF;
221         int retval;
222 
223         retval = ibmphp_hpc_writeslot(slot_cur, cmd);
224         if (retval) {
225                 err("power off failed\n");
226                 return retval;
227         }
228         if (CTLR_RESULT(slot_cur->ctrl->status)) {
229                 err("command not completed successfully in power_off\n");
230                 retval = -EIO;
231         }
232         return retval;
233 }
234 
235 static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value)
236 {
237         int rc = 0;
238         struct slot *pslot;
239         u8 cmd = 0x00;     /* avoid compiler warning */
240 
241         debug("set_attention_status - Entry hotplug_slot[%lx] value[%x]\n",
242                         (ulong) hotplug_slot, value);
243         ibmphp_lock_operations();
244 
245 
246         if (hotplug_slot) {
247                 switch (value) {
248                 case HPC_SLOT_ATTN_OFF:
249                         cmd = HPC_SLOT_ATTNOFF;
250                         break;
251                 case HPC_SLOT_ATTN_ON:
252                         cmd = HPC_SLOT_ATTNON;
253                         break;
254                 case HPC_SLOT_ATTN_BLINK:
255                         cmd = HPC_SLOT_BLINKLED;
256                         break;
257                 default:
258                         rc = -ENODEV;
259                         err("set_attention_status - Error : invalid input [%x]\n",
260                                         value);
261                         break;
262                 }
263                 if (rc == 0) {
264                         pslot = hotplug_slot->private;
265                         if (pslot)
266                                 rc = ibmphp_hpc_writeslot(pslot, cmd);
267                         else
268                                 rc = -ENODEV;
269                 }
270         } else
271                 rc = -ENODEV;
272 
273         ibmphp_unlock_operations();
274 
275         debug("set_attention_status - Exit rc[%d]\n", rc);
276         return rc;
277 }
278 
279 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
280 {
281         int rc = -ENODEV;
282         struct slot *pslot;
283         struct slot myslot;
284 
285         debug("get_attention_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
286                                         (ulong) hotplug_slot, (ulong) value);
287 
288         ibmphp_lock_operations();
289         if (hotplug_slot) {
290                 pslot = hotplug_slot->private;
291                 if (pslot) {
292                         memcpy(&myslot, pslot, sizeof(struct slot));
293                         rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
294                                                 &(myslot.status));
295                         if (!rc)
296                                 rc = ibmphp_hpc_readslot(pslot,
297                                                 READ_EXTSLOTSTATUS,
298                                                 &(myslot.ext_status));
299                         if (!rc)
300                                 *value = SLOT_ATTN(myslot.status,
301                                                 myslot.ext_status);
302                 }
303         }
304 
305         ibmphp_unlock_operations();
306         debug("get_attention_status - Exit rc[%d] value[%x]\n", rc, *value);
307         return rc;
308 }
309 
310 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
311 {
312         int rc = -ENODEV;
313         struct slot *pslot;
314         struct slot myslot;
315 
316         debug("get_latch_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
317                                         (ulong) hotplug_slot, (ulong) value);
318         ibmphp_lock_operations();
319         if (hotplug_slot) {
320                 pslot = hotplug_slot->private;
321                 if (pslot) {
322                         memcpy(&myslot, pslot, sizeof(struct slot));
323                         rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
324                                                 &(myslot.status));
325                         if (!rc)
326                                 *value = SLOT_LATCH(myslot.status);
327                 }
328         }
329 
330         ibmphp_unlock_operations();
331         debug("get_latch_status - Exit rc[%d] rc[%x] value[%x]\n",
332                         rc, rc, *value);
333         return rc;
334 }
335 
336 
337 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
338 {
339         int rc = -ENODEV;
340         struct slot *pslot;
341         struct slot myslot;
342 
343         debug("get_power_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
344                                         (ulong) hotplug_slot, (ulong) value);
345         ibmphp_lock_operations();
346         if (hotplug_slot) {
347                 pslot = hotplug_slot->private;
348                 if (pslot) {
349                         memcpy(&myslot, pslot, sizeof(struct slot));
350                         rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
351                                                 &(myslot.status));
352                         if (!rc)
353                                 *value = SLOT_PWRGD(myslot.status);
354                 }
355         }
356 
357         ibmphp_unlock_operations();
358         debug("get_power_status - Exit rc[%d] rc[%x] value[%x]\n",
359                         rc, rc, *value);
360         return rc;
361 }
362 
363 static int get_adapter_present(struct hotplug_slot *hotplug_slot, u8 *value)
364 {
365         int rc = -ENODEV;
366         struct slot *pslot;
367         u8 present;
368         struct slot myslot;
369 
370         debug("get_adapter_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
371                                         (ulong) hotplug_slot, (ulong) value);
372         ibmphp_lock_operations();
373         if (hotplug_slot) {
374                 pslot = hotplug_slot->private;
375                 if (pslot) {
376                         memcpy(&myslot, pslot, sizeof(struct slot));
377                         rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
378                                                 &(myslot.status));
379                         if (!rc) {
380                                 present = SLOT_PRESENT(myslot.status);
381                                 if (present == HPC_SLOT_EMPTY)
382                                         *value = 0;
383                                 else
384                                         *value = 1;
385                         }
386                 }
387         }
388 
389         ibmphp_unlock_operations();
390         debug("get_adapter_present - Exit rc[%d] value[%x]\n", rc, *value);
391         return rc;
392 }
393 
394 static int get_max_bus_speed(struct slot *slot)
395 {
396         int rc;
397         u8 mode = 0;
398         enum pci_bus_speed speed;
399         struct pci_bus *bus = slot->hotplug_slot->pci_slot->bus;
400 
401         debug("%s - Entry slot[%p]\n", __func__, slot);
402 
403         ibmphp_lock_operations();
404         mode = slot->supported_bus_mode;
405         speed = slot->supported_speed;
406         ibmphp_unlock_operations();
407 
408         switch (speed) {
409         case BUS_SPEED_33:
410                 break;
411         case BUS_SPEED_66:
412                 if (mode == BUS_MODE_PCIX)
413                         speed += 0x01;
414                 break;
415         case BUS_SPEED_100:
416         case BUS_SPEED_133:
417                 speed += 0x01;
418                 break;
419         default:
420                 /* Note (will need to change): there would be soon 256, 512 also */
421                 rc = -ENODEV;
422         }
423 
424         if (!rc)
425                 bus->max_bus_speed = speed;
426 
427         debug("%s - Exit rc[%d] speed[%x]\n", __func__, rc, speed);
428         return rc;
429 }
430 
431 /*
432 static int get_max_adapter_speed_1(struct hotplug_slot *hotplug_slot, u8 *value, u8 flag)
433 {
434         int rc = -ENODEV;
435         struct slot *pslot;
436         struct slot myslot;
437 
438         debug("get_max_adapter_speed_1 - Entry hotplug_slot[%lx] pvalue[%lx]\n",
439                                                 (ulong)hotplug_slot, (ulong) value);
440 
441         if (flag)
442                 ibmphp_lock_operations();
443 
444         if (hotplug_slot && value) {
445                 pslot = hotplug_slot->private;
446                 if (pslot) {
447                         memcpy(&myslot, pslot, sizeof(struct slot));
448                         rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
449                                                 &(myslot.status));
450 
451                         if (!(SLOT_LATCH (myslot.status)) &&
452                                         (SLOT_PRESENT (myslot.status))) {
453                                 rc = ibmphp_hpc_readslot(pslot,
454                                                 READ_EXTSLOTSTATUS,
455                                                 &(myslot.ext_status));
456                                 if (!rc)
457                                         *value = SLOT_SPEED(myslot.ext_status);
458                         } else
459                                 *value = MAX_ADAPTER_NONE;
460                 }
461         }
462 
463         if (flag)
464                 ibmphp_unlock_operations();
465 
466         debug("get_max_adapter_speed_1 - Exit rc[%d] value[%x]\n", rc, *value);
467         return rc;
468 }
469 
470 static int get_bus_name(struct hotplug_slot *hotplug_slot, char *value)
471 {
472         int rc = -ENODEV;
473         struct slot *pslot = NULL;
474 
475         debug("get_bus_name - Entry hotplug_slot[%lx]\n", (ulong)hotplug_slot);
476 
477         ibmphp_lock_operations();
478 
479         if (hotplug_slot) {
480                 pslot = hotplug_slot->private;
481                 if (pslot) {
482                         rc = 0;
483                         snprintf(value, 100, "Bus %x", pslot->bus);
484                 }
485         } else
486                 rc = -ENODEV;
487 
488         ibmphp_unlock_operations();
489         debug("get_bus_name - Exit rc[%d] value[%x]\n", rc, *value);
490         return rc;
491 }
492 */
493 
494 /****************************************************************************
495  * This routine will initialize the ops data structure used in the validate
496  * function. It will also power off empty slots that are powered on since BIOS
497  * leaves those on, albeit disconnected
498  ****************************************************************************/
499 static int __init init_ops(void)
500 {
501         struct slot *slot_cur;
502         int retval;
503         int rc;
504 
505         list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
506                 debug("BEFORE GETTING SLOT STATUS, slot # %x\n",
507                                                         slot_cur->number);
508                 if (slot_cur->ctrl->revision == 0xFF)
509                         if (get_ctrl_revision(slot_cur,
510                                                 &slot_cur->ctrl->revision))
511                                 return -1;
512 
513                 if (slot_cur->bus_on->current_speed == 0xFF)
514                         if (get_cur_bus_info(&slot_cur))
515                                 return -1;
516                 get_max_bus_speed(slot_cur);
517 
518                 if (slot_cur->ctrl->options == 0xFF)
519                         if (get_hpc_options(slot_cur, &slot_cur->ctrl->options))
520                                 return -1;
521 
522                 retval = slot_update(&slot_cur);
523                 if (retval)
524                         return retval;
525 
526                 debug("status = %x\n", slot_cur->status);
527                 debug("ext_status = %x\n", slot_cur->ext_status);
528                 debug("SLOT_POWER = %x\n", SLOT_POWER(slot_cur->status));
529                 debug("SLOT_PRESENT = %x\n", SLOT_PRESENT(slot_cur->status));
530                 debug("SLOT_LATCH = %x\n", SLOT_LATCH(slot_cur->status));
531 
532                 if ((SLOT_PWRGD(slot_cur->status)) &&
533                     !(SLOT_PRESENT(slot_cur->status)) &&
534                     !(SLOT_LATCH(slot_cur->status))) {
535                         debug("BEFORE POWER OFF COMMAND\n");
536                                 rc = power_off(slot_cur);
537                                 if (rc)
538                                         return rc;
539 
540         /*              retval = slot_update(&slot_cur);
541          *              if (retval)
542          *                      return retval;
543          *              ibmphp_update_slot_info(slot_cur);
544          */
545                 }
546         }
547         init_flag = 0;
548         return 0;
549 }
550 
551 /* This operation will check whether the slot is within the bounds and
552  * the operation is valid to perform on that slot
553  * Parameters: slot, operation
554  * Returns: 0 or error codes
555  */
556 static int validate(struct slot *slot_cur, int opn)
557 {
558         int number;
559         int retval;
560 
561         if (!slot_cur)
562                 return -ENODEV;
563         number = slot_cur->number;
564         if ((number > max_slots) || (number < 0))
565                 return -EBADSLT;
566         debug("slot_number in validate is %d\n", slot_cur->number);
567 
568         retval = slot_update(&slot_cur);
569         if (retval)
570                 return retval;
571 
572         switch (opn) {
573                 case ENABLE:
574                         if (!(SLOT_PWRGD(slot_cur->status)) &&
575                              (SLOT_PRESENT(slot_cur->status)) &&
576                              !(SLOT_LATCH(slot_cur->status)))
577                                 return 0;
578                         break;
579                 case DISABLE:
580                         if ((SLOT_PWRGD(slot_cur->status)) &&
581                             (SLOT_PRESENT(slot_cur->status)) &&
582                             !(SLOT_LATCH(slot_cur->status)))
583                                 return 0;
584                         break;
585                 default:
586                         break;
587         }
588         err("validate failed....\n");
589         return -EINVAL;
590 }
591 
592 /****************************************************************************
593  * This routine is for updating the data structures in the hotplug core
594  * Parameters: struct slot
595  * Returns: 0 or error
596  ****************************************************************************/
597 int ibmphp_update_slot_info(struct slot *slot_cur)
598 {
599         struct hotplug_slot_info *info;
600         struct pci_bus *bus = slot_cur->hotplug_slot->pci_slot->bus;
601         int rc;
602         u8 bus_speed;
603         u8 mode;
604 
605         info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
606         if (!info) {
607                 err("out of system memory\n");
608                 return -ENOMEM;
609         }
610 
611         info->power_status = SLOT_PWRGD(slot_cur->status);
612         info->attention_status = SLOT_ATTN(slot_cur->status,
613                                                 slot_cur->ext_status);
614         info->latch_status = SLOT_LATCH(slot_cur->status);
615         if (!SLOT_PRESENT(slot_cur->status)) {
616                 info->adapter_status = 0;
617 /*              info->max_adapter_speed_status = MAX_ADAPTER_NONE; */
618         } else {
619                 info->adapter_status = 1;
620 /*              get_max_adapter_speed_1(slot_cur->hotplug_slot,
621                                         &info->max_adapter_speed_status, 0); */
622         }
623 
624         bus_speed = slot_cur->bus_on->current_speed;
625         mode = slot_cur->bus_on->current_bus_mode;
626 
627         switch (bus_speed) {
628                 case BUS_SPEED_33:
629                         break;
630                 case BUS_SPEED_66:
631                         if (mode == BUS_MODE_PCIX)
632                                 bus_speed += 0x01;
633                         else if (mode == BUS_MODE_PCI)
634                                 ;
635                         else
636                                 bus_speed = PCI_SPEED_UNKNOWN;
637                         break;
638                 case BUS_SPEED_100:
639                 case BUS_SPEED_133:
640                         bus_speed += 0x01;
641                         break;
642                 default:
643                         bus_speed = PCI_SPEED_UNKNOWN;
644         }
645 
646         bus->cur_bus_speed = bus_speed;
647         // To do: bus_names
648 
649         rc = pci_hp_change_slot_info(slot_cur->hotplug_slot, info);
650         kfree(info);
651         return rc;
652 }
653 
654 
655 /******************************************************************************
656  * This function will return the pci_func, given bus and devfunc, or NULL.  It
657  * is called from visit routines
658  ******************************************************************************/
659 
660 static struct pci_func *ibm_slot_find(u8 busno, u8 device, u8 function)
661 {
662         struct pci_func *func_cur;
663         struct slot *slot_cur;
664         list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
665                 if (slot_cur->func) {
666                         func_cur = slot_cur->func;
667                         while (func_cur) {
668                                 if ((func_cur->busno == busno) &&
669                                                 (func_cur->device == device) &&
670                                                 (func_cur->function == function))
671                                         return func_cur;
672                                 func_cur = func_cur->next;
673                         }
674                 }
675         }
676         return NULL;
677 }
678 
679 /*************************************************************
680  * This routine frees up memory used by struct slot, including
681  * the pointers to pci_func, bus, hotplug_slot, controller,
682  * and deregistering from the hotplug core
683  *************************************************************/
684 static void free_slots(void)
685 {
686         struct slot *slot_cur, *next;
687 
688         debug("%s -- enter\n", __func__);
689 
690         list_for_each_entry_safe(slot_cur, next, &ibmphp_slot_head,
691                                  ibm_slot_list) {
692                 pci_hp_deregister(slot_cur->hotplug_slot);
693         }
694         debug("%s -- exit\n", __func__);
695 }
696 
697 static void ibm_unconfigure_device(struct pci_func *func)
698 {
699         struct pci_dev *temp;
700         u8 j;
701 
702         debug("inside %s\n", __func__);
703         debug("func->device = %x, func->function = %x\n",
704                                         func->device, func->function);
705         debug("func->device << 3 | 0x0  = %x\n", func->device << 3 | 0x0);
706 
707         pci_lock_rescan_remove();
708 
709         for (j = 0; j < 0x08; j++) {
710                 temp = pci_get_bus_and_slot(func->busno, (func->device << 3) | j);
711                 if (temp) {
712                         pci_stop_and_remove_bus_device(temp);
713                         pci_dev_put(temp);
714                 }
715         }
716 
717         pci_dev_put(func->dev);
718 
719         pci_unlock_rescan_remove();
720 }
721 
722 /*
723  * The following function is to fix kernel bug regarding
724  * getting bus entries, here we manually add those primary
725  * bus entries to kernel bus structure whenever apply
726  */
727 static u8 bus_structure_fixup(u8 busno)
728 {
729         struct pci_bus *bus, *b;
730         struct pci_dev *dev;
731         u16 l;
732 
733         if (pci_find_bus(0, busno) || !(ibmphp_find_same_bus_num(busno)))
734                 return 1;
735 
736         bus = kmalloc(sizeof(*bus), GFP_KERNEL);
737         if (!bus) {
738                 err("%s - out of memory\n", __func__);
739                 return 1;
740         }
741         dev = kmalloc(sizeof(*dev), GFP_KERNEL);
742         if (!dev) {
743                 kfree(bus);
744                 err("%s - out of memory\n", __func__);
745                 return 1;
746         }
747 
748         bus->number = busno;
749         bus->ops = ibmphp_pci_bus->ops;
750         dev->bus = bus;
751         for (dev->devfn = 0; dev->devfn < 256; dev->devfn += 8) {
752                 if (!pci_read_config_word(dev, PCI_VENDOR_ID, &l) &&
753                                         (l != 0x0000) && (l != 0xffff)) {
754                         debug("%s - Inside bus_structure_fixup()\n",
755                                                         __func__);
756                         b = pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL);
757                         if (!b)
758                                 continue;
759 
760                         pci_bus_add_devices(b);
761                         break;
762                 }
763         }
764 
765         kfree(dev);
766         kfree(bus);
767 
768         return 0;
769 }
770 
771 static int ibm_configure_device(struct pci_func *func)
772 {
773         struct pci_bus *child;
774         int num;
775         int flag = 0;   /* this is to make sure we don't double scan the bus,
776                                         for bridged devices primarily */
777 
778         pci_lock_rescan_remove();
779 
780         if (!(bus_structure_fixup(func->busno)))
781                 flag = 1;
782         if (func->dev == NULL)
783                 func->dev = pci_get_bus_and_slot(func->busno,
784                                 PCI_DEVFN(func->device, func->function));
785 
786         if (func->dev == NULL) {
787                 struct pci_bus *bus = pci_find_bus(0, func->busno);
788                 if (!bus)
789                         goto out;
790 
791                 num = pci_scan_slot(bus,
792                                 PCI_DEVFN(func->device, func->function));
793                 if (num)
794                         pci_bus_add_devices(bus);
795 
796                 func->dev = pci_get_bus_and_slot(func->busno,
797                                 PCI_DEVFN(func->device, func->function));
798                 if (func->dev == NULL) {
799                         err("ERROR... : pci_dev still NULL\n");
800                         goto out;
801                 }
802         }
803         if (!(flag) && (func->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)) {
804                 pci_hp_add_bridge(func->dev);
805                 child = func->dev->subordinate;
806                 if (child)
807                         pci_bus_add_devices(child);
808         }
809 
810  out:
811         pci_unlock_rescan_remove();
812         return 0;
813 }
814 
815 /*******************************************************
816  * Returns whether the bus is empty or not
817  *******************************************************/
818 static int is_bus_empty(struct slot *slot_cur)
819 {
820         int rc;
821         struct slot *tmp_slot;
822         u8 i = slot_cur->bus_on->slot_min;
823 
824         while (i <= slot_cur->bus_on->slot_max) {
825                 if (i == slot_cur->number) {
826                         i++;
827                         continue;
828                 }
829                 tmp_slot = ibmphp_get_slot_from_physical_num(i);
830                 if (!tmp_slot)
831                         return 0;
832                 rc = slot_update(&tmp_slot);
833                 if (rc)
834                         return 0;
835                 if (SLOT_PRESENT(tmp_slot->status) &&
836                                         SLOT_PWRGD(tmp_slot->status))
837                         return 0;
838                 i++;
839         }
840         return 1;
841 }
842 
843 /***********************************************************
844  * If the HPC permits and the bus currently empty, tries to set the
845  * bus speed and mode at the maximum card and bus capability
846  * Parameters: slot
847  * Returns: bus is set (0) or error code
848  ***********************************************************/
849 static int set_bus(struct slot *slot_cur)
850 {
851         int rc;
852         u8 speed;
853         u8 cmd = 0x0;
854         int retval;
855         static struct pci_device_id ciobx[] = {
856                 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, 0x0101) },
857                 { },
858         };
859 
860         debug("%s - entry slot # %d\n", __func__, slot_cur->number);
861         if (SET_BUS_STATUS(slot_cur->ctrl) && is_bus_empty(slot_cur)) {
862                 rc = slot_update(&slot_cur);
863                 if (rc)
864                         return rc;
865                 speed = SLOT_SPEED(slot_cur->ext_status);
866                 debug("ext_status = %x, speed = %x\n", slot_cur->ext_status, speed);
867                 switch (speed) {
868                 case HPC_SLOT_SPEED_33:
869                         cmd = HPC_BUS_33CONVMODE;
870                         break;
871                 case HPC_SLOT_SPEED_66:
872                         if (SLOT_PCIX(slot_cur->ext_status)) {
873                                 if ((slot_cur->supported_speed >= BUS_SPEED_66) &&
874                                                 (slot_cur->supported_bus_mode == BUS_MODE_PCIX))
875                                         cmd = HPC_BUS_66PCIXMODE;
876                                 else if (!SLOT_BUS_MODE(slot_cur->ext_status))
877                                         /* if max slot/bus capability is 66 pci
878                                         and there's no bus mode mismatch, then
879                                         the adapter supports 66 pci */
880                                         cmd = HPC_BUS_66CONVMODE;
881                                 else
882                                         cmd = HPC_BUS_33CONVMODE;
883                         } else {
884                                 if (slot_cur->supported_speed >= BUS_SPEED_66)
885                                         cmd = HPC_BUS_66CONVMODE;
886                                 else
887                                         cmd = HPC_BUS_33CONVMODE;
888                         }
889                         break;
890                 case HPC_SLOT_SPEED_133:
891                         switch (slot_cur->supported_speed) {
892                         case BUS_SPEED_33:
893                                 cmd = HPC_BUS_33CONVMODE;
894                                 break;
895                         case BUS_SPEED_66:
896                                 if (slot_cur->supported_bus_mode == BUS_MODE_PCIX)
897                                         cmd = HPC_BUS_66PCIXMODE;
898                                 else
899                                         cmd = HPC_BUS_66CONVMODE;
900                                 break;
901                         case BUS_SPEED_100:
902                                 cmd = HPC_BUS_100PCIXMODE;
903                                 break;
904                         case BUS_SPEED_133:
905                                 /* This is to take care of the bug in CIOBX chip */
906                                 if (pci_dev_present(ciobx))
907                                         ibmphp_hpc_writeslot(slot_cur,
908                                                         HPC_BUS_100PCIXMODE);
909                                 cmd = HPC_BUS_133PCIXMODE;
910                                 break;
911                         default:
912                                 err("Wrong bus speed\n");
913                                 return -ENODEV;
914                         }
915                         break;
916                 default:
917                         err("wrong slot speed\n");
918                         return -ENODEV;
919                 }
920                 debug("setting bus speed for slot %d, cmd %x\n",
921                                                 slot_cur->number, cmd);
922                 retval = ibmphp_hpc_writeslot(slot_cur, cmd);
923                 if (retval) {
924                         err("setting bus speed failed\n");
925                         return retval;
926                 }
927                 if (CTLR_RESULT(slot_cur->ctrl->status)) {
928                         err("command not completed successfully in set_bus\n");
929                         return -EIO;
930                 }
931         }
932         /* This is for x440, once Brandon fixes the firmware,
933         will not need this delay */
934         msleep(1000);
935         debug("%s -Exit\n", __func__);
936         return 0;
937 }
938 
939 /* This routine checks the bus limitations that the slot is on from the BIOS.
940  * This is used in deciding whether or not to power up the slot.
941  * (electrical/spec limitations. For example, >1 133 MHz or >2 66 PCI cards on
942  * same bus)
943  * Parameters: slot
944  * Returns: 0 = no limitations, -EINVAL = exceeded limitations on the bus
945  */
946 static int check_limitations(struct slot *slot_cur)
947 {
948         u8 i;
949         struct slot *tmp_slot;
950         u8 count = 0;
951         u8 limitation = 0;
952 
953         for (i = slot_cur->bus_on->slot_min; i <= slot_cur->bus_on->slot_max; i++) {
954                 tmp_slot = ibmphp_get_slot_from_physical_num(i);
955                 if (!tmp_slot)
956                         return -ENODEV;
957                 if ((SLOT_PWRGD(tmp_slot->status)) &&
958                                         !(SLOT_CONNECT(tmp_slot->status)))
959                         count++;
960         }
961         get_cur_bus_info(&slot_cur);
962         switch (slot_cur->bus_on->current_speed) {
963         case BUS_SPEED_33:
964                 limitation = slot_cur->bus_on->slots_at_33_conv;
965                 break;
966         case BUS_SPEED_66:
967                 if (slot_cur->bus_on->current_bus_mode == BUS_MODE_PCIX)
968                         limitation = slot_cur->bus_on->slots_at_66_pcix;
969                 else
970                         limitation = slot_cur->bus_on->slots_at_66_conv;
971                 break;
972         case BUS_SPEED_100:
973                 limitation = slot_cur->bus_on->slots_at_100_pcix;
974                 break;
975         case BUS_SPEED_133:
976                 limitation = slot_cur->bus_on->slots_at_133_pcix;
977                 break;
978         }
979 
980         if ((count + 1) > limitation)
981                 return -EINVAL;
982         return 0;
983 }
984 
985 static inline void print_card_capability(struct slot *slot_cur)
986 {
987         info("capability of the card is ");
988         if ((slot_cur->ext_status & CARD_INFO) == PCIX133)
989                 info("   133 MHz PCI-X\n");
990         else if ((slot_cur->ext_status & CARD_INFO) == PCIX66)
991                 info("    66 MHz PCI-X\n");
992         else if ((slot_cur->ext_status & CARD_INFO) == PCI66)
993                 info("    66 MHz PCI\n");
994         else
995                 info("    33 MHz PCI\n");
996 
997 }
998 
999 /* This routine will power on the slot, configure the device(s) and find the
1000  * drivers for them.
1001  * Parameters: hotplug_slot
1002  * Returns: 0 or failure codes
1003  */
1004 static int enable_slot(struct hotplug_slot *hs)
1005 {
1006         int rc, i, rcpr;
1007         struct slot *slot_cur;
1008         u8 function;
1009         struct pci_func *tmp_func;
1010 
1011         ibmphp_lock_operations();
1012 
1013         debug("ENABLING SLOT........\n");
1014         slot_cur = hs->private;
1015 
1016         rc = validate(slot_cur, ENABLE);
1017         if (rc) {
1018                 err("validate function failed\n");
1019                 goto error_nopower;
1020         }
1021 
1022         attn_LED_blink(slot_cur);
1023 
1024         rc = set_bus(slot_cur);
1025         if (rc) {
1026                 err("was not able to set the bus\n");
1027                 goto error_nopower;
1028         }
1029 
1030         /*-----------------debugging------------------------------*/
1031         get_cur_bus_info(&slot_cur);
1032         debug("the current bus speed right after set_bus = %x\n",
1033                                         slot_cur->bus_on->current_speed);
1034         /*----------------------------------------------------------*/
1035 
1036         rc = check_limitations(slot_cur);
1037         if (rc) {
1038                 err("Adding this card exceeds the limitations of this bus.\n");
1039                 err("(i.e., >1 133MHz cards running on same bus, or >2 66 PCI cards running on same bus.\n");
1040                 err("Try hot-adding into another bus\n");
1041                 rc = -EINVAL;
1042                 goto error_nopower;
1043         }
1044 
1045         rc = power_on(slot_cur);
1046 
1047         if (rc) {
1048                 err("something wrong when powering up... please see below for details\n");
1049                 /* need to turn off before on, otherwise, blinking overwrites */
1050                 attn_off(slot_cur);
1051                 attn_on(slot_cur);
1052                 if (slot_update(&slot_cur)) {
1053                         attn_off(slot_cur);
1054                         attn_on(slot_cur);
1055                         rc = -ENODEV;
1056                         goto exit;
1057                 }
1058                 /* Check to see the error of why it failed */
1059                 if ((SLOT_POWER(slot_cur->status)) &&
1060                                         !(SLOT_PWRGD(slot_cur->status)))
1061                         err("power fault occurred trying to power up\n");
1062                 else if (SLOT_BUS_SPEED(slot_cur->status)) {
1063                         err("bus speed mismatch occurred.  please check current bus speed and card capability\n");
1064                         print_card_capability(slot_cur);
1065                 } else if (SLOT_BUS_MODE(slot_cur->ext_status)) {
1066                         err("bus mode mismatch occurred.  please check current bus mode and card capability\n");
1067                         print_card_capability(slot_cur);
1068                 }
1069                 ibmphp_update_slot_info(slot_cur);
1070                 goto exit;
1071         }
1072         debug("after power_on\n");
1073         /*-----------------------debugging---------------------------*/
1074         get_cur_bus_info(&slot_cur);
1075         debug("the current bus speed right after power_on = %x\n",
1076                                         slot_cur->bus_on->current_speed);
1077         /*----------------------------------------------------------*/
1078 
1079         rc = slot_update(&slot_cur);
1080         if (rc)
1081                 goto error_power;
1082 
1083         rc = -EINVAL;
1084         if (SLOT_POWER(slot_cur->status) && !(SLOT_PWRGD(slot_cur->status))) {
1085                 err("power fault occurred trying to power up...\n");
1086                 goto error_power;
1087         }
1088         if (SLOT_POWER(slot_cur->status) && (SLOT_BUS_SPEED(slot_cur->status))) {
1089                 err("bus speed mismatch occurred.  please check current bus speed and card capability\n");
1090                 print_card_capability(slot_cur);
1091                 goto error_power;
1092         }
1093         /* Don't think this case will happen after above checks...
1094          * but just in case, for paranoia sake */
1095         if (!(SLOT_POWER(slot_cur->status))) {
1096                 err("power on failed...\n");
1097                 goto error_power;
1098         }
1099 
1100         slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1101         if (!slot_cur->func) {
1102                 /* We cannot do update_slot_info here, since no memory for
1103                  * kmalloc n.e.ways, and update_slot_info allocates some */
1104                 err("out of system memory\n");
1105                 rc = -ENOMEM;
1106                 goto error_power;
1107         }
1108         slot_cur->func->busno = slot_cur->bus;
1109         slot_cur->func->device = slot_cur->device;
1110         for (i = 0; i < 4; i++)
1111                 slot_cur->func->irq[i] = slot_cur->irq[i];
1112 
1113         debug("b4 configure_card, slot_cur->bus = %x, slot_cur->device = %x\n",
1114                                         slot_cur->bus, slot_cur->device);
1115 
1116         if (ibmphp_configure_card(slot_cur->func, slot_cur->number)) {
1117                 err("configure_card was unsuccessful...\n");
1118                 /* true because don't need to actually deallocate resources,
1119                  * just remove references */
1120                 ibmphp_unconfigure_card(&slot_cur, 1);
1121                 debug("after unconfigure_card\n");
1122                 slot_cur->func = NULL;
1123                 rc = -ENOMEM;
1124                 goto error_power;
1125         }
1126 
1127         function = 0x00;
1128         do {
1129                 tmp_func = ibm_slot_find(slot_cur->bus, slot_cur->func->device,
1130                                                         function++);
1131                 if (tmp_func && !(tmp_func->dev))
1132                         ibm_configure_device(tmp_func);
1133         } while (tmp_func);
1134 
1135         attn_off(slot_cur);
1136         if (slot_update(&slot_cur)) {
1137                 rc = -EFAULT;
1138                 goto exit;
1139         }
1140         ibmphp_print_test();
1141         rc = ibmphp_update_slot_info(slot_cur);
1142 exit:
1143         ibmphp_unlock_operations();
1144         return rc;
1145 
1146 error_nopower:
1147         attn_off(slot_cur);     /* need to turn off if was blinking b4 */
1148         attn_on(slot_cur);
1149 error_cont:
1150         rcpr = slot_update(&slot_cur);
1151         if (rcpr) {
1152                 rc = rcpr;
1153                 goto exit;
1154         }
1155         ibmphp_update_slot_info(slot_cur);
1156         goto exit;
1157 
1158 error_power:
1159         attn_off(slot_cur);     /* need to turn off if was blinking b4 */
1160         attn_on(slot_cur);
1161         rcpr = power_off(slot_cur);
1162         if (rcpr) {
1163                 rc = rcpr;
1164                 goto exit;
1165         }
1166         goto error_cont;
1167 }
1168 
1169 /**************************************************************
1170 * HOT REMOVING ADAPTER CARD                                   *
1171 * INPUT: POINTER TO THE HOTPLUG SLOT STRUCTURE                *
1172 * OUTPUT: SUCCESS 0 ; FAILURE: UNCONFIGURE , VALIDATE         *
1173 *               DISABLE POWER ,                               *
1174 **************************************************************/
1175 static int ibmphp_disable_slot(struct hotplug_slot *hotplug_slot)
1176 {
1177         struct slot *slot = hotplug_slot->private;
1178         int rc;
1179 
1180         ibmphp_lock_operations();
1181         rc = ibmphp_do_disable_slot(slot);
1182         ibmphp_unlock_operations();
1183         return rc;
1184 }
1185 
1186 int ibmphp_do_disable_slot(struct slot *slot_cur)
1187 {
1188         int rc;
1189         u8 flag;
1190 
1191         debug("DISABLING SLOT...\n");
1192 
1193         if ((slot_cur == NULL) || (slot_cur->ctrl == NULL))
1194                 return -ENODEV;
1195 
1196         flag = slot_cur->flag;
1197         slot_cur->flag = 1;
1198 
1199         if (flag == 1) {
1200                 rc = validate(slot_cur, DISABLE);
1201                         /* checking if powered off already & valid slot # */
1202                 if (rc)
1203                         goto error;
1204         }
1205         attn_LED_blink(slot_cur);
1206 
1207         if (slot_cur->func == NULL) {
1208                 /* We need this for functions that were there on bootup */
1209                 slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1210                 if (!slot_cur->func) {
1211                         err("out of system memory\n");
1212                         rc = -ENOMEM;
1213                         goto error;
1214                 }
1215                 slot_cur->func->busno = slot_cur->bus;
1216                 slot_cur->func->device = slot_cur->device;
1217         }
1218 
1219         ibm_unconfigure_device(slot_cur->func);
1220 
1221         /*
1222          * If we got here from latch suddenly opening on operating card or
1223          * a power fault, there's no power to the card, so cannot
1224          * read from it to determine what resources it occupied.  This operation
1225          * is forbidden anyhow.  The best we can do is remove it from kernel
1226          * lists at least */
1227 
1228         if (!flag) {
1229                 attn_off(slot_cur);
1230                 return 0;
1231         }
1232 
1233         rc = ibmphp_unconfigure_card(&slot_cur, 0);
1234         slot_cur->func = NULL;
1235         debug("in disable_slot. after unconfigure_card\n");
1236         if (rc) {
1237                 err("could not unconfigure card.\n");
1238                 goto error;
1239         }
1240 
1241         rc = ibmphp_hpc_writeslot(slot_cur, HPC_SLOT_OFF);
1242         if (rc)
1243                 goto error;
1244 
1245         attn_off(slot_cur);
1246         rc = slot_update(&slot_cur);
1247         if (rc)
1248                 goto exit;
1249 
1250         rc = ibmphp_update_slot_info(slot_cur);
1251         ibmphp_print_test();
1252 exit:
1253         return rc;
1254 
1255 error:
1256         /*  Need to turn off if was blinking b4 */
1257         attn_off(slot_cur);
1258         attn_on(slot_cur);
1259         if (slot_update(&slot_cur)) {
1260                 rc = -EFAULT;
1261                 goto exit;
1262         }
1263         if (flag)
1264                 ibmphp_update_slot_info(slot_cur);
1265         goto exit;
1266 }
1267 
1268 struct hotplug_slot_ops ibmphp_hotplug_slot_ops = {
1269         .set_attention_status =         set_attention_status,
1270         .enable_slot =                  enable_slot,
1271         .disable_slot =                 ibmphp_disable_slot,
1272         .hardware_test =                NULL,
1273         .get_power_status =             get_power_status,
1274         .get_attention_status =         get_attention_status,
1275         .get_latch_status =             get_latch_status,
1276         .get_adapter_status =           get_adapter_present,
1277 /*      .get_max_adapter_speed =        get_max_adapter_speed,
1278         .get_bus_name_status =          get_bus_name,
1279 */
1280 };
1281 
1282 static void ibmphp_unload(void)
1283 {
1284         free_slots();
1285         debug("after slots\n");
1286         ibmphp_free_resources();
1287         debug("after resources\n");
1288         ibmphp_free_bus_info_queue();
1289         debug("after bus info\n");
1290         ibmphp_free_ebda_hpc_queue();
1291         debug("after ebda hpc\n");
1292         ibmphp_free_ebda_pci_rsrc_queue();
1293         debug("after ebda pci rsrc\n");
1294         kfree(ibmphp_pci_bus);
1295 }
1296 
1297 static int __init ibmphp_init(void)
1298 {
1299         struct pci_bus *bus;
1300         int i = 0;
1301         int rc = 0;
1302 
1303         init_flag = 1;
1304 
1305         info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
1306 
1307         ibmphp_pci_bus = kmalloc(sizeof(*ibmphp_pci_bus), GFP_KERNEL);
1308         if (!ibmphp_pci_bus) {
1309                 err("out of memory\n");
1310                 rc = -ENOMEM;
1311                 goto exit;
1312         }
1313 
1314         bus = pci_find_bus(0, 0);
1315         if (!bus) {
1316                 err("Can't find the root pci bus, can not continue\n");
1317                 rc = -ENODEV;
1318                 goto error;
1319         }
1320         memcpy(ibmphp_pci_bus, bus, sizeof(*ibmphp_pci_bus));
1321 
1322         ibmphp_debug = debug;
1323 
1324         ibmphp_hpc_initvars();
1325 
1326         for (i = 0; i < 16; i++)
1327                 irqs[i] = 0;
1328 
1329         rc = ibmphp_access_ebda();
1330         if (rc)
1331                 goto error;
1332         debug("after ibmphp_access_ebda()\n");
1333 
1334         rc = ibmphp_rsrc_init();
1335         if (rc)
1336                 goto error;
1337         debug("AFTER Resource & EBDA INITIALIZATIONS\n");
1338 
1339         max_slots = get_max_slots();
1340 
1341         rc = ibmphp_register_pci();
1342         if (rc)
1343                 goto error;
1344 
1345         if (init_ops()) {
1346                 rc = -ENODEV;
1347                 goto error;
1348         }
1349 
1350         ibmphp_print_test();
1351         rc = ibmphp_hpc_start_poll_thread();
1352         if (rc)
1353                 goto error;
1354 
1355 exit:
1356         return rc;
1357 
1358 error:
1359         ibmphp_unload();
1360         goto exit;
1361 }
1362 
1363 static void __exit ibmphp_exit(void)
1364 {
1365         ibmphp_hpc_stop_poll_thread();
1366         debug("after polling\n");
1367         ibmphp_unload();
1368         debug("done\n");
1369 }
1370 
1371 module_init(ibmphp_init);
1372 module_exit(ibmphp_exit);
1373 

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