Version:  2.0.40 2.2.26 2.4.37 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 3.19 4.0 4.1 4.2

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         struct list_head *tmp;
120         u8 slot_count = 0;
121 
122         list_for_each(tmp, &ibmphp_slot_head) {
123                 slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
124                 /* sometimes the hot-pluggable slots start with 4 (not always from 1) */
125                 slot_count = max(slot_count, slot_cur->number);
126         }
127         return slot_count;
128 }
129 
130 /* This routine will put the correct slot->device information per slot.  It's
131  * called from initialization of the slot structures. It will also assign
132  * interrupt numbers per each slot.
133  * Parameters: struct slot
134  * Returns 0 or errors
135  */
136 int ibmphp_init_devno(struct slot **cur_slot)
137 {
138         struct irq_routing_table *rtable;
139         int len;
140         int loop;
141         int i;
142 
143         rtable = pcibios_get_irq_routing_table();
144         if (!rtable) {
145                 err("no BIOS routing table...\n");
146                 return -ENOMEM;
147         }
148 
149         len = (rtable->size - sizeof(struct irq_routing_table)) /
150                         sizeof(struct irq_info);
151 
152         if (!len) {
153                 kfree(rtable);
154                 return -1;
155         }
156         for (loop = 0; loop < len; loop++) {
157                 if ((*cur_slot)->number == rtable->slots[loop].slot &&
158                     (*cur_slot)->bus == rtable->slots[loop].bus) {
159                         (*cur_slot)->device = PCI_SLOT(rtable->slots[loop].devfn);
160                         for (i = 0; i < 4; i++)
161                                 (*cur_slot)->irq[i] = IO_APIC_get_PCI_irq_vector((int) (*cur_slot)->bus,
162                                                 (int) (*cur_slot)->device, i);
163 
164                         debug("(*cur_slot)->irq[0] = %x\n",
165                                         (*cur_slot)->irq[0]);
166                         debug("(*cur_slot)->irq[1] = %x\n",
167                                         (*cur_slot)->irq[1]);
168                         debug("(*cur_slot)->irq[2] = %x\n",
169                                         (*cur_slot)->irq[2]);
170                         debug("(*cur_slot)->irq[3] = %x\n",
171                                         (*cur_slot)->irq[3]);
172 
173                         debug("rtable->exclusive_irqs = %x\n",
174                                         rtable->exclusive_irqs);
175                         debug("rtable->slots[loop].irq[0].bitmap = %x\n",
176                                         rtable->slots[loop].irq[0].bitmap);
177                         debug("rtable->slots[loop].irq[1].bitmap = %x\n",
178                                         rtable->slots[loop].irq[1].bitmap);
179                         debug("rtable->slots[loop].irq[2].bitmap = %x\n",
180                                         rtable->slots[loop].irq[2].bitmap);
181                         debug("rtable->slots[loop].irq[3].bitmap = %x\n",
182                                         rtable->slots[loop].irq[3].bitmap);
183 
184                         debug("rtable->slots[loop].irq[0].link = %x\n",
185                                         rtable->slots[loop].irq[0].link);
186                         debug("rtable->slots[loop].irq[1].link = %x\n",
187                                         rtable->slots[loop].irq[1].link);
188                         debug("rtable->slots[loop].irq[2].link = %x\n",
189                                         rtable->slots[loop].irq[2].link);
190                         debug("rtable->slots[loop].irq[3].link = %x\n",
191                                         rtable->slots[loop].irq[3].link);
192                         debug("end of init_devno\n");
193                         kfree(rtable);
194                         return 0;
195                 }
196         }
197 
198         kfree(rtable);
199         return -1;
200 }
201 
202 static inline int power_on(struct slot *slot_cur)
203 {
204         u8 cmd = HPC_SLOT_ON;
205         int retval;
206 
207         retval = ibmphp_hpc_writeslot(slot_cur, cmd);
208         if (retval) {
209                 err("power on failed\n");
210                 return retval;
211         }
212         if (CTLR_RESULT(slot_cur->ctrl->status)) {
213                 err("command not completed successfully in power_on\n");
214                 return -EIO;
215         }
216         msleep(3000);   /* For ServeRAID cards, and some 66 PCI */
217         return 0;
218 }
219 
220 static inline int power_off(struct slot *slot_cur)
221 {
222         u8 cmd = HPC_SLOT_OFF;
223         int retval;
224 
225         retval = ibmphp_hpc_writeslot(slot_cur, cmd);
226         if (retval) {
227                 err("power off failed\n");
228                 return retval;
229         }
230         if (CTLR_RESULT(slot_cur->ctrl->status)) {
231                 err("command not completed successfully in power_off\n");
232                 retval = -EIO;
233         }
234         return retval;
235 }
236 
237 static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value)
238 {
239         int rc = 0;
240         struct slot *pslot;
241         u8 cmd = 0x00;     /* avoid compiler warning */
242 
243         debug("set_attention_status - Entry hotplug_slot[%lx] value[%x]\n",
244                         (ulong) hotplug_slot, value);
245         ibmphp_lock_operations();
246 
247 
248         if (hotplug_slot) {
249                 switch (value) {
250                 case HPC_SLOT_ATTN_OFF:
251                         cmd = HPC_SLOT_ATTNOFF;
252                         break;
253                 case HPC_SLOT_ATTN_ON:
254                         cmd = HPC_SLOT_ATTNON;
255                         break;
256                 case HPC_SLOT_ATTN_BLINK:
257                         cmd = HPC_SLOT_BLINKLED;
258                         break;
259                 default:
260                         rc = -ENODEV;
261                         err("set_attention_status - Error : invalid input [%x]\n",
262                                         value);
263                         break;
264                 }
265                 if (rc == 0) {
266                         pslot = hotplug_slot->private;
267                         if (pslot)
268                                 rc = ibmphp_hpc_writeslot(pslot, cmd);
269                         else
270                                 rc = -ENODEV;
271                 }
272         } else
273                 rc = -ENODEV;
274 
275         ibmphp_unlock_operations();
276 
277         debug("set_attention_status - Exit rc[%d]\n", rc);
278         return rc;
279 }
280 
281 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
282 {
283         int rc = -ENODEV;
284         struct slot *pslot;
285         struct slot myslot;
286 
287         debug("get_attention_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
288                                         (ulong) hotplug_slot, (ulong) value);
289 
290         ibmphp_lock_operations();
291         if (hotplug_slot) {
292                 pslot = hotplug_slot->private;
293                 if (pslot) {
294                         memcpy(&myslot, pslot, sizeof(struct slot));
295                         rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
296                                                 &(myslot.status));
297                         if (!rc)
298                                 rc = ibmphp_hpc_readslot(pslot,
299                                                 READ_EXTSLOTSTATUS,
300                                                 &(myslot.ext_status));
301                         if (!rc)
302                                 *value = SLOT_ATTN(myslot.status,
303                                                 myslot.ext_status);
304                 }
305         }
306 
307         ibmphp_unlock_operations();
308         debug("get_attention_status - Exit rc[%d] value[%x]\n", rc, *value);
309         return rc;
310 }
311 
312 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
313 {
314         int rc = -ENODEV;
315         struct slot *pslot;
316         struct slot myslot;
317 
318         debug("get_latch_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
319                                         (ulong) hotplug_slot, (ulong) value);
320         ibmphp_lock_operations();
321         if (hotplug_slot) {
322                 pslot = hotplug_slot->private;
323                 if (pslot) {
324                         memcpy(&myslot, pslot, sizeof(struct slot));
325                         rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
326                                                 &(myslot.status));
327                         if (!rc)
328                                 *value = SLOT_LATCH(myslot.status);
329                 }
330         }
331 
332         ibmphp_unlock_operations();
333         debug("get_latch_status - Exit rc[%d] rc[%x] value[%x]\n",
334                         rc, rc, *value);
335         return rc;
336 }
337 
338 
339 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
340 {
341         int rc = -ENODEV;
342         struct slot *pslot;
343         struct slot myslot;
344 
345         debug("get_power_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
346                                         (ulong) hotplug_slot, (ulong) value);
347         ibmphp_lock_operations();
348         if (hotplug_slot) {
349                 pslot = hotplug_slot->private;
350                 if (pslot) {
351                         memcpy(&myslot, pslot, sizeof(struct slot));
352                         rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
353                                                 &(myslot.status));
354                         if (!rc)
355                                 *value = SLOT_PWRGD(myslot.status);
356                 }
357         }
358 
359         ibmphp_unlock_operations();
360         debug("get_power_status - Exit rc[%d] rc[%x] value[%x]\n",
361                         rc, rc, *value);
362         return rc;
363 }
364 
365 static int get_adapter_present(struct hotplug_slot *hotplug_slot, u8 *value)
366 {
367         int rc = -ENODEV;
368         struct slot *pslot;
369         u8 present;
370         struct slot myslot;
371 
372         debug("get_adapter_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
373                                         (ulong) hotplug_slot, (ulong) value);
374         ibmphp_lock_operations();
375         if (hotplug_slot) {
376                 pslot = hotplug_slot->private;
377                 if (pslot) {
378                         memcpy(&myslot, pslot, sizeof(struct slot));
379                         rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
380                                                 &(myslot.status));
381                         if (!rc) {
382                                 present = SLOT_PRESENT(myslot.status);
383                                 if (present == HPC_SLOT_EMPTY)
384                                         *value = 0;
385                                 else
386                                         *value = 1;
387                         }
388                 }
389         }
390 
391         ibmphp_unlock_operations();
392         debug("get_adapter_present - Exit rc[%d] value[%x]\n", rc, *value);
393         return rc;
394 }
395 
396 static int get_max_bus_speed(struct slot *slot)
397 {
398         int rc;
399         u8 mode = 0;
400         enum pci_bus_speed speed;
401         struct pci_bus *bus = slot->hotplug_slot->pci_slot->bus;
402 
403         debug("%s - Entry slot[%p]\n", __func__, slot);
404 
405         ibmphp_lock_operations();
406         mode = slot->supported_bus_mode;
407         speed = slot->supported_speed;
408         ibmphp_unlock_operations();
409 
410         switch (speed) {
411         case BUS_SPEED_33:
412                 break;
413         case BUS_SPEED_66:
414                 if (mode == BUS_MODE_PCIX)
415                         speed += 0x01;
416                 break;
417         case BUS_SPEED_100:
418         case BUS_SPEED_133:
419                 speed += 0x01;
420                 break;
421         default:
422                 /* Note (will need to change): there would be soon 256, 512 also */
423                 rc = -ENODEV;
424         }
425 
426         if (!rc)
427                 bus->max_bus_speed = speed;
428 
429         debug("%s - Exit rc[%d] speed[%x]\n", __func__, rc, speed);
430         return rc;
431 }
432 
433 /*
434 static int get_max_adapter_speed_1(struct hotplug_slot *hotplug_slot, u8 *value, u8 flag)
435 {
436         int rc = -ENODEV;
437         struct slot *pslot;
438         struct slot myslot;
439 
440         debug("get_max_adapter_speed_1 - Entry hotplug_slot[%lx] pvalue[%lx]\n",
441                                                 (ulong)hotplug_slot, (ulong) value);
442 
443         if (flag)
444                 ibmphp_lock_operations();
445 
446         if (hotplug_slot && value) {
447                 pslot = hotplug_slot->private;
448                 if (pslot) {
449                         memcpy(&myslot, pslot, sizeof(struct slot));
450                         rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
451                                                 &(myslot.status));
452 
453                         if (!(SLOT_LATCH (myslot.status)) &&
454                                         (SLOT_PRESENT (myslot.status))) {
455                                 rc = ibmphp_hpc_readslot(pslot,
456                                                 READ_EXTSLOTSTATUS,
457                                                 &(myslot.ext_status));
458                                 if (!rc)
459                                         *value = SLOT_SPEED(myslot.ext_status);
460                         } else
461                                 *value = MAX_ADAPTER_NONE;
462                 }
463         }
464 
465         if (flag)
466                 ibmphp_unlock_operations();
467 
468         debug("get_max_adapter_speed_1 - Exit rc[%d] value[%x]\n", rc, *value);
469         return rc;
470 }
471 
472 static int get_bus_name(struct hotplug_slot *hotplug_slot, char *value)
473 {
474         int rc = -ENODEV;
475         struct slot *pslot = NULL;
476 
477         debug("get_bus_name - Entry hotplug_slot[%lx]\n", (ulong)hotplug_slot);
478 
479         ibmphp_lock_operations();
480 
481         if (hotplug_slot) {
482                 pslot = hotplug_slot->private;
483                 if (pslot) {
484                         rc = 0;
485                         snprintf(value, 100, "Bus %x", pslot->bus);
486                 }
487         } else
488                 rc = -ENODEV;
489 
490         ibmphp_unlock_operations();
491         debug("get_bus_name - Exit rc[%d] value[%x]\n", rc, *value);
492         return rc;
493 }
494 */
495 
496 /****************************************************************************
497  * This routine will initialize the ops data structure used in the validate
498  * function. It will also power off empty slots that are powered on since BIOS
499  * leaves those on, albeit disconnected
500  ****************************************************************************/
501 static int __init init_ops(void)
502 {
503         struct slot *slot_cur;
504         struct list_head *tmp;
505         int retval;
506         int rc;
507 
508         list_for_each(tmp, &ibmphp_slot_head) {
509                 slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
510 
511                 if (!slot_cur)
512                         return -ENODEV;
513 
514                 debug("BEFORE GETTING SLOT STATUS, slot # %x\n",
515                                                         slot_cur->number);
516                 if (slot_cur->ctrl->revision == 0xFF)
517                         if (get_ctrl_revision(slot_cur,
518                                                 &slot_cur->ctrl->revision))
519                                 return -1;
520 
521                 if (slot_cur->bus_on->current_speed == 0xFF)
522                         if (get_cur_bus_info(&slot_cur))
523                                 return -1;
524                 get_max_bus_speed(slot_cur);
525 
526                 if (slot_cur->ctrl->options == 0xFF)
527                         if (get_hpc_options(slot_cur, &slot_cur->ctrl->options))
528                                 return -1;
529 
530                 retval = slot_update(&slot_cur);
531                 if (retval)
532                         return retval;
533 
534                 debug("status = %x\n", slot_cur->status);
535                 debug("ext_status = %x\n", slot_cur->ext_status);
536                 debug("SLOT_POWER = %x\n", SLOT_POWER(slot_cur->status));
537                 debug("SLOT_PRESENT = %x\n", SLOT_PRESENT(slot_cur->status));
538                 debug("SLOT_LATCH = %x\n", SLOT_LATCH(slot_cur->status));
539 
540                 if ((SLOT_PWRGD(slot_cur->status)) &&
541                     !(SLOT_PRESENT(slot_cur->status)) &&
542                     !(SLOT_LATCH(slot_cur->status))) {
543                         debug("BEFORE POWER OFF COMMAND\n");
544                                 rc = power_off(slot_cur);
545                                 if (rc)
546                                         return rc;
547 
548         /*              retval = slot_update(&slot_cur);
549          *              if (retval)
550          *                      return retval;
551          *              ibmphp_update_slot_info(slot_cur);
552          */
553                 }
554         }
555         init_flag = 0;
556         return 0;
557 }
558 
559 /* This operation will check whether the slot is within the bounds and
560  * the operation is valid to perform on that slot
561  * Parameters: slot, operation
562  * Returns: 0 or error codes
563  */
564 static int validate(struct slot *slot_cur, int opn)
565 {
566         int number;
567         int retval;
568 
569         if (!slot_cur)
570                 return -ENODEV;
571         number = slot_cur->number;
572         if ((number > max_slots) || (number < 0))
573                 return -EBADSLT;
574         debug("slot_number in validate is %d\n", slot_cur->number);
575 
576         retval = slot_update(&slot_cur);
577         if (retval)
578                 return retval;
579 
580         switch (opn) {
581                 case ENABLE:
582                         if (!(SLOT_PWRGD(slot_cur->status)) &&
583                              (SLOT_PRESENT(slot_cur->status)) &&
584                              !(SLOT_LATCH(slot_cur->status)))
585                                 return 0;
586                         break;
587                 case DISABLE:
588                         if ((SLOT_PWRGD(slot_cur->status)) &&
589                             (SLOT_PRESENT(slot_cur->status)) &&
590                             !(SLOT_LATCH(slot_cur->status)))
591                                 return 0;
592                         break;
593                 default:
594                         break;
595         }
596         err("validate failed....\n");
597         return -EINVAL;
598 }
599 
600 /****************************************************************************
601  * This routine is for updating the data structures in the hotplug core
602  * Parameters: struct slot
603  * Returns: 0 or error
604  ****************************************************************************/
605 int ibmphp_update_slot_info(struct slot *slot_cur)
606 {
607         struct hotplug_slot_info *info;
608         struct pci_bus *bus = slot_cur->hotplug_slot->pci_slot->bus;
609         int rc;
610         u8 bus_speed;
611         u8 mode;
612 
613         info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
614         if (!info) {
615                 err("out of system memory\n");
616                 return -ENOMEM;
617         }
618 
619         info->power_status = SLOT_PWRGD(slot_cur->status);
620         info->attention_status = SLOT_ATTN(slot_cur->status,
621                                                 slot_cur->ext_status);
622         info->latch_status = SLOT_LATCH(slot_cur->status);
623         if (!SLOT_PRESENT(slot_cur->status)) {
624                 info->adapter_status = 0;
625 /*              info->max_adapter_speed_status = MAX_ADAPTER_NONE; */
626         } else {
627                 info->adapter_status = 1;
628 /*              get_max_adapter_speed_1(slot_cur->hotplug_slot,
629                                         &info->max_adapter_speed_status, 0); */
630         }
631 
632         bus_speed = slot_cur->bus_on->current_speed;
633         mode = slot_cur->bus_on->current_bus_mode;
634 
635         switch (bus_speed) {
636                 case BUS_SPEED_33:
637                         break;
638                 case BUS_SPEED_66:
639                         if (mode == BUS_MODE_PCIX)
640                                 bus_speed += 0x01;
641                         else if (mode == BUS_MODE_PCI)
642                                 ;
643                         else
644                                 bus_speed = PCI_SPEED_UNKNOWN;
645                         break;
646                 case BUS_SPEED_100:
647                 case BUS_SPEED_133:
648                         bus_speed += 0x01;
649                         break;
650                 default:
651                         bus_speed = PCI_SPEED_UNKNOWN;
652         }
653 
654         bus->cur_bus_speed = bus_speed;
655         // To do: bus_names
656 
657         rc = pci_hp_change_slot_info(slot_cur->hotplug_slot, info);
658         kfree(info);
659         return rc;
660 }
661 
662 
663 /******************************************************************************
664  * This function will return the pci_func, given bus and devfunc, or NULL.  It
665  * is called from visit routines
666  ******************************************************************************/
667 
668 static struct pci_func *ibm_slot_find(u8 busno, u8 device, u8 function)
669 {
670         struct pci_func *func_cur;
671         struct slot *slot_cur;
672         struct list_head *tmp;
673         list_for_each(tmp, &ibmphp_slot_head) {
674                 slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
675                 if (slot_cur->func) {
676                         func_cur = slot_cur->func;
677                         while (func_cur) {
678                                 if ((func_cur->busno == busno) &&
679                                                 (func_cur->device == device) &&
680                                                 (func_cur->function == function))
681                                         return func_cur;
682                                 func_cur = func_cur->next;
683                         }
684                 }
685         }
686         return NULL;
687 }
688 
689 /*************************************************************
690  * This routine frees up memory used by struct slot, including
691  * the pointers to pci_func, bus, hotplug_slot, controller,
692  * and deregistering from the hotplug core
693  *************************************************************/
694 static void free_slots(void)
695 {
696         struct slot *slot_cur;
697         struct list_head *tmp;
698         struct list_head *next;
699 
700         debug("%s -- enter\n", __func__);
701 
702         list_for_each_safe(tmp, next, &ibmphp_slot_head) {
703                 slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
704                 pci_hp_deregister(slot_cur->hotplug_slot);
705         }
706         debug("%s -- exit\n", __func__);
707 }
708 
709 static void ibm_unconfigure_device(struct pci_func *func)
710 {
711         struct pci_dev *temp;
712         u8 j;
713 
714         debug("inside %s\n", __func__);
715         debug("func->device = %x, func->function = %x\n",
716                                         func->device, func->function);
717         debug("func->device << 3 | 0x0  = %x\n", func->device << 3 | 0x0);
718 
719         pci_lock_rescan_remove();
720 
721         for (j = 0; j < 0x08; j++) {
722                 temp = pci_get_bus_and_slot(func->busno, (func->device << 3) | j);
723                 if (temp) {
724                         pci_stop_and_remove_bus_device(temp);
725                         pci_dev_put(temp);
726                 }
727         }
728 
729         pci_dev_put(func->dev);
730 
731         pci_unlock_rescan_remove();
732 }
733 
734 /*
735  * The following function is to fix kernel bug regarding
736  * getting bus entries, here we manually add those primary
737  * bus entries to kernel bus structure whenever apply
738  */
739 static u8 bus_structure_fixup(u8 busno)
740 {
741         struct pci_bus *bus, *b;
742         struct pci_dev *dev;
743         u16 l;
744 
745         if (pci_find_bus(0, busno) || !(ibmphp_find_same_bus_num(busno)))
746                 return 1;
747 
748         bus = kmalloc(sizeof(*bus), GFP_KERNEL);
749         if (!bus) {
750                 err("%s - out of memory\n", __func__);
751                 return 1;
752         }
753         dev = kmalloc(sizeof(*dev), GFP_KERNEL);
754         if (!dev) {
755                 kfree(bus);
756                 err("%s - out of memory\n", __func__);
757                 return 1;
758         }
759 
760         bus->number = busno;
761         bus->ops = ibmphp_pci_bus->ops;
762         dev->bus = bus;
763         for (dev->devfn = 0; dev->devfn < 256; dev->devfn += 8) {
764                 if (!pci_read_config_word(dev, PCI_VENDOR_ID, &l) &&
765                                         (l != 0x0000) && (l != 0xffff)) {
766                         debug("%s - Inside bus_structure_fixup()\n",
767                                                         __func__);
768                         b = pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL);
769                         if (!b)
770                                 continue;
771 
772                         pci_bus_add_devices(b);
773                         break;
774                 }
775         }
776 
777         kfree(dev);
778         kfree(bus);
779 
780         return 0;
781 }
782 
783 static int ibm_configure_device(struct pci_func *func)
784 {
785         struct pci_bus *child;
786         int num;
787         int flag = 0;   /* this is to make sure we don't double scan the bus,
788                                         for bridged devices primarily */
789 
790         pci_lock_rescan_remove();
791 
792         if (!(bus_structure_fixup(func->busno)))
793                 flag = 1;
794         if (func->dev == NULL)
795                 func->dev = pci_get_bus_and_slot(func->busno,
796                                 PCI_DEVFN(func->device, func->function));
797 
798         if (func->dev == NULL) {
799                 struct pci_bus *bus = pci_find_bus(0, func->busno);
800                 if (!bus)
801                         goto out;
802 
803                 num = pci_scan_slot(bus,
804                                 PCI_DEVFN(func->device, func->function));
805                 if (num)
806                         pci_bus_add_devices(bus);
807 
808                 func->dev = pci_get_bus_and_slot(func->busno,
809                                 PCI_DEVFN(func->device, func->function));
810                 if (func->dev == NULL) {
811                         err("ERROR... : pci_dev still NULL\n");
812                         goto out;
813                 }
814         }
815         if (!(flag) && (func->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)) {
816                 pci_hp_add_bridge(func->dev);
817                 child = func->dev->subordinate;
818                 if (child)
819                         pci_bus_add_devices(child);
820         }
821 
822  out:
823         pci_unlock_rescan_remove();
824         return 0;
825 }
826 
827 /*******************************************************
828  * Returns whether the bus is empty or not
829  *******************************************************/
830 static int is_bus_empty(struct slot *slot_cur)
831 {
832         int rc;
833         struct slot *tmp_slot;
834         u8 i = slot_cur->bus_on->slot_min;
835 
836         while (i <= slot_cur->bus_on->slot_max) {
837                 if (i == slot_cur->number) {
838                         i++;
839                         continue;
840                 }
841                 tmp_slot = ibmphp_get_slot_from_physical_num(i);
842                 if (!tmp_slot)
843                         return 0;
844                 rc = slot_update(&tmp_slot);
845                 if (rc)
846                         return 0;
847                 if (SLOT_PRESENT(tmp_slot->status) &&
848                                         SLOT_PWRGD(tmp_slot->status))
849                         return 0;
850                 i++;
851         }
852         return 1;
853 }
854 
855 /***********************************************************
856  * If the HPC permits and the bus currently empty, tries to set the
857  * bus speed and mode at the maximum card and bus capability
858  * Parameters: slot
859  * Returns: bus is set (0) or error code
860  ***********************************************************/
861 static int set_bus(struct slot *slot_cur)
862 {
863         int rc;
864         u8 speed;
865         u8 cmd = 0x0;
866         int retval;
867         static struct pci_device_id ciobx[] = {
868                 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, 0x0101) },
869                 { },
870         };
871 
872         debug("%s - entry slot # %d\n", __func__, slot_cur->number);
873         if (SET_BUS_STATUS(slot_cur->ctrl) && is_bus_empty(slot_cur)) {
874                 rc = slot_update(&slot_cur);
875                 if (rc)
876                         return rc;
877                 speed = SLOT_SPEED(slot_cur->ext_status);
878                 debug("ext_status = %x, speed = %x\n", slot_cur->ext_status, speed);
879                 switch (speed) {
880                 case HPC_SLOT_SPEED_33:
881                         cmd = HPC_BUS_33CONVMODE;
882                         break;
883                 case HPC_SLOT_SPEED_66:
884                         if (SLOT_PCIX(slot_cur->ext_status)) {
885                                 if ((slot_cur->supported_speed >= BUS_SPEED_66) &&
886                                                 (slot_cur->supported_bus_mode == BUS_MODE_PCIX))
887                                         cmd = HPC_BUS_66PCIXMODE;
888                                 else if (!SLOT_BUS_MODE(slot_cur->ext_status))
889                                         /* if max slot/bus capability is 66 pci
890                                         and there's no bus mode mismatch, then
891                                         the adapter supports 66 pci */
892                                         cmd = HPC_BUS_66CONVMODE;
893                                 else
894                                         cmd = HPC_BUS_33CONVMODE;
895                         } else {
896                                 if (slot_cur->supported_speed >= BUS_SPEED_66)
897                                         cmd = HPC_BUS_66CONVMODE;
898                                 else
899                                         cmd = HPC_BUS_33CONVMODE;
900                         }
901                         break;
902                 case HPC_SLOT_SPEED_133:
903                         switch (slot_cur->supported_speed) {
904                         case BUS_SPEED_33:
905                                 cmd = HPC_BUS_33CONVMODE;
906                                 break;
907                         case BUS_SPEED_66:
908                                 if (slot_cur->supported_bus_mode == BUS_MODE_PCIX)
909                                         cmd = HPC_BUS_66PCIXMODE;
910                                 else
911                                         cmd = HPC_BUS_66CONVMODE;
912                                 break;
913                         case BUS_SPEED_100:
914                                 cmd = HPC_BUS_100PCIXMODE;
915                                 break;
916                         case BUS_SPEED_133:
917                                 /* This is to take care of the bug in CIOBX chip */
918                                 if (pci_dev_present(ciobx))
919                                         ibmphp_hpc_writeslot(slot_cur,
920                                                         HPC_BUS_100PCIXMODE);
921                                 cmd = HPC_BUS_133PCIXMODE;
922                                 break;
923                         default:
924                                 err("Wrong bus speed\n");
925                                 return -ENODEV;
926                         }
927                         break;
928                 default:
929                         err("wrong slot speed\n");
930                         return -ENODEV;
931                 }
932                 debug("setting bus speed for slot %d, cmd %x\n",
933                                                 slot_cur->number, cmd);
934                 retval = ibmphp_hpc_writeslot(slot_cur, cmd);
935                 if (retval) {
936                         err("setting bus speed failed\n");
937                         return retval;
938                 }
939                 if (CTLR_RESULT(slot_cur->ctrl->status)) {
940                         err("command not completed successfully in set_bus\n");
941                         return -EIO;
942                 }
943         }
944         /* This is for x440, once Brandon fixes the firmware,
945         will not need this delay */
946         msleep(1000);
947         debug("%s -Exit\n", __func__);
948         return 0;
949 }
950 
951 /* This routine checks the bus limitations that the slot is on from the BIOS.
952  * This is used in deciding whether or not to power up the slot.
953  * (electrical/spec limitations. For example, >1 133 MHz or >2 66 PCI cards on
954  * same bus)
955  * Parameters: slot
956  * Returns: 0 = no limitations, -EINVAL = exceeded limitations on the bus
957  */
958 static int check_limitations(struct slot *slot_cur)
959 {
960         u8 i;
961         struct slot *tmp_slot;
962         u8 count = 0;
963         u8 limitation = 0;
964 
965         for (i = slot_cur->bus_on->slot_min; i <= slot_cur->bus_on->slot_max; i++) {
966                 tmp_slot = ibmphp_get_slot_from_physical_num(i);
967                 if (!tmp_slot)
968                         return -ENODEV;
969                 if ((SLOT_PWRGD(tmp_slot->status)) &&
970                                         !(SLOT_CONNECT(tmp_slot->status)))
971                         count++;
972         }
973         get_cur_bus_info(&slot_cur);
974         switch (slot_cur->bus_on->current_speed) {
975         case BUS_SPEED_33:
976                 limitation = slot_cur->bus_on->slots_at_33_conv;
977                 break;
978         case BUS_SPEED_66:
979                 if (slot_cur->bus_on->current_bus_mode == BUS_MODE_PCIX)
980                         limitation = slot_cur->bus_on->slots_at_66_pcix;
981                 else
982                         limitation = slot_cur->bus_on->slots_at_66_conv;
983                 break;
984         case BUS_SPEED_100:
985                 limitation = slot_cur->bus_on->slots_at_100_pcix;
986                 break;
987         case BUS_SPEED_133:
988                 limitation = slot_cur->bus_on->slots_at_133_pcix;
989                 break;
990         }
991 
992         if ((count + 1) > limitation)
993                 return -EINVAL;
994         return 0;
995 }
996 
997 static inline void print_card_capability(struct slot *slot_cur)
998 {
999         info("capability of the card is ");
1000         if ((slot_cur->ext_status & CARD_INFO) == PCIX133)
1001                 info("   133 MHz PCI-X\n");
1002         else if ((slot_cur->ext_status & CARD_INFO) == PCIX66)
1003                 info("    66 MHz PCI-X\n");
1004         else if ((slot_cur->ext_status & CARD_INFO) == PCI66)
1005                 info("    66 MHz PCI\n");
1006         else
1007                 info("    33 MHz PCI\n");
1008 
1009 }
1010 
1011 /* This routine will power on the slot, configure the device(s) and find the
1012  * drivers for them.
1013  * Parameters: hotplug_slot
1014  * Returns: 0 or failure codes
1015  */
1016 static int enable_slot(struct hotplug_slot *hs)
1017 {
1018         int rc, i, rcpr;
1019         struct slot *slot_cur;
1020         u8 function;
1021         struct pci_func *tmp_func;
1022 
1023         ibmphp_lock_operations();
1024 
1025         debug("ENABLING SLOT........\n");
1026         slot_cur = hs->private;
1027 
1028         rc = validate(slot_cur, ENABLE);
1029         if (rc) {
1030                 err("validate function failed\n");
1031                 goto error_nopower;
1032         }
1033 
1034         attn_LED_blink(slot_cur);
1035 
1036         rc = set_bus(slot_cur);
1037         if (rc) {
1038                 err("was not able to set the bus\n");
1039                 goto error_nopower;
1040         }
1041 
1042         /*-----------------debugging------------------------------*/
1043         get_cur_bus_info(&slot_cur);
1044         debug("the current bus speed right after set_bus = %x\n",
1045                                         slot_cur->bus_on->current_speed);
1046         /*----------------------------------------------------------*/
1047 
1048         rc = check_limitations(slot_cur);
1049         if (rc) {
1050                 err("Adding this card exceeds the limitations of this bus.\n");
1051                 err("(i.e., >1 133MHz cards running on same bus, or >2 66 PCI cards running on same bus.\n");
1052                 err("Try hot-adding into another bus\n");
1053                 rc = -EINVAL;
1054                 goto error_nopower;
1055         }
1056 
1057         rc = power_on(slot_cur);
1058 
1059         if (rc) {
1060                 err("something wrong when powering up... please see below for details\n");
1061                 /* need to turn off before on, otherwise, blinking overwrites */
1062                 attn_off(slot_cur);
1063                 attn_on(slot_cur);
1064                 if (slot_update(&slot_cur)) {
1065                         attn_off(slot_cur);
1066                         attn_on(slot_cur);
1067                         rc = -ENODEV;
1068                         goto exit;
1069                 }
1070                 /* Check to see the error of why it failed */
1071                 if ((SLOT_POWER(slot_cur->status)) &&
1072                                         !(SLOT_PWRGD(slot_cur->status)))
1073                         err("power fault occurred trying to power up\n");
1074                 else if (SLOT_BUS_SPEED(slot_cur->status)) {
1075                         err("bus speed mismatch occurred.  please check current bus speed and card capability\n");
1076                         print_card_capability(slot_cur);
1077                 } else if (SLOT_BUS_MODE(slot_cur->ext_status)) {
1078                         err("bus mode mismatch occurred.  please check current bus mode and card capability\n");
1079                         print_card_capability(slot_cur);
1080                 }
1081                 ibmphp_update_slot_info(slot_cur);
1082                 goto exit;
1083         }
1084         debug("after power_on\n");
1085         /*-----------------------debugging---------------------------*/
1086         get_cur_bus_info(&slot_cur);
1087         debug("the current bus speed right after power_on = %x\n",
1088                                         slot_cur->bus_on->current_speed);
1089         /*----------------------------------------------------------*/
1090 
1091         rc = slot_update(&slot_cur);
1092         if (rc)
1093                 goto error_power;
1094 
1095         rc = -EINVAL;
1096         if (SLOT_POWER(slot_cur->status) && !(SLOT_PWRGD(slot_cur->status))) {
1097                 err("power fault occurred trying to power up...\n");
1098                 goto error_power;
1099         }
1100         if (SLOT_POWER(slot_cur->status) && (SLOT_BUS_SPEED(slot_cur->status))) {
1101                 err("bus speed mismatch occurred.  please check current bus speed and card capability\n");
1102                 print_card_capability(slot_cur);
1103                 goto error_power;
1104         }
1105         /* Don't think this case will happen after above checks...
1106          * but just in case, for paranoia sake */
1107         if (!(SLOT_POWER(slot_cur->status))) {
1108                 err("power on failed...\n");
1109                 goto error_power;
1110         }
1111 
1112         slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1113         if (!slot_cur->func) {
1114                 /* We cannot do update_slot_info here, since no memory for
1115                  * kmalloc n.e.ways, and update_slot_info allocates some */
1116                 err("out of system memory\n");
1117                 rc = -ENOMEM;
1118                 goto error_power;
1119         }
1120         slot_cur->func->busno = slot_cur->bus;
1121         slot_cur->func->device = slot_cur->device;
1122         for (i = 0; i < 4; i++)
1123                 slot_cur->func->irq[i] = slot_cur->irq[i];
1124 
1125         debug("b4 configure_card, slot_cur->bus = %x, slot_cur->device = %x\n",
1126                                         slot_cur->bus, slot_cur->device);
1127 
1128         if (ibmphp_configure_card(slot_cur->func, slot_cur->number)) {
1129                 err("configure_card was unsuccessful...\n");
1130                 /* true because don't need to actually deallocate resources,
1131                  * just remove references */
1132                 ibmphp_unconfigure_card(&slot_cur, 1);
1133                 debug("after unconfigure_card\n");
1134                 slot_cur->func = NULL;
1135                 rc = -ENOMEM;
1136                 goto error_power;
1137         }
1138 
1139         function = 0x00;
1140         do {
1141                 tmp_func = ibm_slot_find(slot_cur->bus, slot_cur->func->device,
1142                                                         function++);
1143                 if (tmp_func && !(tmp_func->dev))
1144                         ibm_configure_device(tmp_func);
1145         } while (tmp_func);
1146 
1147         attn_off(slot_cur);
1148         if (slot_update(&slot_cur)) {
1149                 rc = -EFAULT;
1150                 goto exit;
1151         }
1152         ibmphp_print_test();
1153         rc = ibmphp_update_slot_info(slot_cur);
1154 exit:
1155         ibmphp_unlock_operations();
1156         return rc;
1157 
1158 error_nopower:
1159         attn_off(slot_cur);     /* need to turn off if was blinking b4 */
1160         attn_on(slot_cur);
1161 error_cont:
1162         rcpr = slot_update(&slot_cur);
1163         if (rcpr) {
1164                 rc = rcpr;
1165                 goto exit;
1166         }
1167         ibmphp_update_slot_info(slot_cur);
1168         goto exit;
1169 
1170 error_power:
1171         attn_off(slot_cur);     /* need to turn off if was blinking b4 */
1172         attn_on(slot_cur);
1173         rcpr = power_off(slot_cur);
1174         if (rcpr) {
1175                 rc = rcpr;
1176                 goto exit;
1177         }
1178         goto error_cont;
1179 }
1180 
1181 /**************************************************************
1182 * HOT REMOVING ADAPTER CARD                                   *
1183 * INPUT: POINTER TO THE HOTPLUG SLOT STRUCTURE                *
1184 * OUTPUT: SUCCESS 0 ; FAILURE: UNCONFIGURE , VALIDATE         *
1185           DISABLE POWER ,                                    *
1186 **************************************************************/
1187 static int ibmphp_disable_slot(struct hotplug_slot *hotplug_slot)
1188 {
1189         struct slot *slot = hotplug_slot->private;
1190         int rc;
1191 
1192         ibmphp_lock_operations();
1193         rc = ibmphp_do_disable_slot(slot);
1194         ibmphp_unlock_operations();
1195         return rc;
1196 }
1197 
1198 int ibmphp_do_disable_slot(struct slot *slot_cur)
1199 {
1200         int rc;
1201         u8 flag;
1202 
1203         debug("DISABLING SLOT...\n");
1204 
1205         if ((slot_cur == NULL) || (slot_cur->ctrl == NULL))
1206                 return -ENODEV;
1207 
1208         flag = slot_cur->flag;
1209         slot_cur->flag = 1;
1210 
1211         if (flag == 1) {
1212                 rc = validate(slot_cur, DISABLE);
1213                         /* checking if powered off already & valid slot # */
1214                 if (rc)
1215                         goto error;
1216         }
1217         attn_LED_blink(slot_cur);
1218 
1219         if (slot_cur->func == NULL) {
1220                 /* We need this for functions that were there on bootup */
1221                 slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1222                 if (!slot_cur->func) {
1223                         err("out of system memory\n");
1224                         rc = -ENOMEM;
1225                         goto error;
1226                 }
1227                 slot_cur->func->busno = slot_cur->bus;
1228                 slot_cur->func->device = slot_cur->device;
1229         }
1230 
1231         ibm_unconfigure_device(slot_cur->func);
1232 
1233         /*
1234          * If we got here from latch suddenly opening on operating card or
1235          * a power fault, there's no power to the card, so cannot
1236          * read from it to determine what resources it occupied.  This operation
1237          * is forbidden anyhow.  The best we can do is remove it from kernel
1238          * lists at least */
1239 
1240         if (!flag) {
1241                 attn_off(slot_cur);
1242                 return 0;
1243         }
1244 
1245         rc = ibmphp_unconfigure_card(&slot_cur, 0);
1246         slot_cur->func = NULL;
1247         debug("in disable_slot. after unconfigure_card\n");
1248         if (rc) {
1249                 err("could not unconfigure card.\n");
1250                 goto error;
1251         }
1252 
1253         rc = ibmphp_hpc_writeslot(slot_cur, HPC_SLOT_OFF);
1254         if (rc)
1255                 goto error;
1256 
1257         attn_off(slot_cur);
1258         rc = slot_update(&slot_cur);
1259         if (rc)
1260                 goto exit;
1261 
1262         rc = ibmphp_update_slot_info(slot_cur);
1263         ibmphp_print_test();
1264 exit:
1265         return rc;
1266 
1267 error:
1268         /*  Need to turn off if was blinking b4 */
1269         attn_off(slot_cur);
1270         attn_on(slot_cur);
1271         if (slot_update(&slot_cur)) {
1272                 rc = -EFAULT;
1273                 goto exit;
1274         }
1275         if (flag)
1276                 ibmphp_update_slot_info(slot_cur);
1277         goto exit;
1278 }
1279 
1280 struct hotplug_slot_ops ibmphp_hotplug_slot_ops = {
1281         .set_attention_status =         set_attention_status,
1282         .enable_slot =                  enable_slot,
1283         .disable_slot =                 ibmphp_disable_slot,
1284         .hardware_test =                NULL,
1285         .get_power_status =             get_power_status,
1286         .get_attention_status =         get_attention_status,
1287         .get_latch_status =             get_latch_status,
1288         .get_adapter_status =           get_adapter_present,
1289 /*      .get_max_adapter_speed =        get_max_adapter_speed,
1290         .get_bus_name_status =          get_bus_name,
1291 */
1292 };
1293 
1294 static void ibmphp_unload(void)
1295 {
1296         free_slots();
1297         debug("after slots\n");
1298         ibmphp_free_resources();
1299         debug("after resources\n");
1300         ibmphp_free_bus_info_queue();
1301         debug("after bus info\n");
1302         ibmphp_free_ebda_hpc_queue();
1303         debug("after ebda hpc\n");
1304         ibmphp_free_ebda_pci_rsrc_queue();
1305         debug("after ebda pci rsrc\n");
1306         kfree(ibmphp_pci_bus);
1307 }
1308 
1309 static int __init ibmphp_init(void)
1310 {
1311         struct pci_bus *bus;
1312         int i = 0;
1313         int rc = 0;
1314 
1315         init_flag = 1;
1316 
1317         info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
1318 
1319         ibmphp_pci_bus = kmalloc(sizeof(*ibmphp_pci_bus), GFP_KERNEL);
1320         if (!ibmphp_pci_bus) {
1321                 err("out of memory\n");
1322                 rc = -ENOMEM;
1323                 goto exit;
1324         }
1325 
1326         bus = pci_find_bus(0, 0);
1327         if (!bus) {
1328                 err("Can't find the root pci bus, can not continue\n");
1329                 rc = -ENODEV;
1330                 goto error;
1331         }
1332         memcpy(ibmphp_pci_bus, bus, sizeof(*ibmphp_pci_bus));
1333 
1334         ibmphp_debug = debug;
1335 
1336         ibmphp_hpc_initvars();
1337 
1338         for (i = 0; i < 16; i++)
1339                 irqs[i] = 0;
1340 
1341         rc = ibmphp_access_ebda();
1342         if (rc)
1343                 goto error;
1344         debug("after ibmphp_access_ebda()\n");
1345 
1346         rc = ibmphp_rsrc_init();
1347         if (rc)
1348                 goto error;
1349         debug("AFTER Resource & EBDA INITIALIZATIONS\n");
1350 
1351         max_slots = get_max_slots();
1352 
1353         rc = ibmphp_register_pci();
1354         if (rc)
1355                 goto error;
1356 
1357         if (init_ops()) {
1358                 rc = -ENODEV;
1359                 goto error;
1360         }
1361 
1362         ibmphp_print_test();
1363         rc = ibmphp_hpc_start_poll_thread();
1364         if (rc)
1365                 goto error;
1366 
1367 exit:
1368         return rc;
1369 
1370 error:
1371         ibmphp_unload();
1372         goto exit;
1373 }
1374 
1375 static void __exit ibmphp_exit(void)
1376 {
1377         ibmphp_hpc_stop_poll_thread();
1378         debug("after polling\n");
1379         ibmphp_unload();
1380         debug("done\n");
1381 }
1382 
1383 module_init(ibmphp_init);
1384 module_exit(ibmphp_exit);
1385 

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