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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 "ibmphp.h"
 40 
 41 #define attn_on(sl)  ibmphp_hpc_writeslot (sl, HPC_SLOT_ATTNON)
 42 #define attn_off(sl) ibmphp_hpc_writeslot (sl, HPC_SLOT_ATTNOFF)
 43 #define attn_LED_blink(sl) ibmphp_hpc_writeslot (sl, HPC_SLOT_BLINKLED)
 44 #define get_ctrl_revision(sl, rev) ibmphp_hpc_readslot (sl, READ_REVLEVEL, rev)
 45 #define get_hpc_options(sl, opt) ibmphp_hpc_readslot (sl, READ_HPCOPTIONS, opt)
 46 
 47 #define DRIVER_VERSION  "0.6"
 48 #define DRIVER_DESC     "IBM Hot Plug PCI Controller Driver"
 49 
 50 int ibmphp_debug;
 51 
 52 static bool debug;
 53 module_param(debug, bool, S_IRUGO | S_IWUSR);
 54 MODULE_PARM_DESC (debug, "Debugging mode enabled or not");
 55 MODULE_LICENSE ("GPL");
 56 MODULE_DESCRIPTION (DRIVER_DESC);
 57 
 58 struct pci_bus *ibmphp_pci_bus;
 59 static int max_slots;
 60 
 61 static int irqs[16];    /* PIC mode IRQs we're using so far (in case MPS
 62                          * tables don't provide default info for empty slots */
 63 
 64 static int init_flag;
 65 
 66 /*
 67 static int get_max_adapter_speed_1 (struct hotplug_slot *, u8 *, u8);
 68 
 69 static inline int get_max_adapter_speed (struct hotplug_slot *hs, u8 *value)
 70 {
 71         return get_max_adapter_speed_1 (hs, value, 1);
 72 }
 73 */
 74 static inline int get_cur_bus_info(struct slot **sl)
 75 {
 76         int rc = 1;
 77         struct slot * slot_cur = *sl;
 78 
 79         debug("options = %x\n", slot_cur->ctrl->options);
 80         debug("revision = %x\n", slot_cur->ctrl->revision);
 81 
 82         if (READ_BUS_STATUS(slot_cur->ctrl))
 83                 rc = ibmphp_hpc_readslot(slot_cur, READ_BUSSTATUS, NULL);
 84 
 85         if (rc)
 86                 return rc;
 87 
 88         slot_cur->bus_on->current_speed = CURRENT_BUS_SPEED(slot_cur->busstatus);
 89         if (READ_BUS_MODE(slot_cur->ctrl))
 90                 slot_cur->bus_on->current_bus_mode =
 91                                 CURRENT_BUS_MODE(slot_cur->busstatus);
 92         else
 93                 slot_cur->bus_on->current_bus_mode = 0xFF;
 94 
 95         debug("busstatus = %x, bus_speed = %x, bus_mode = %x\n",
 96                         slot_cur->busstatus,
 97                         slot_cur->bus_on->current_speed,
 98                         slot_cur->bus_on->current_bus_mode);
 99 
100         *sl = slot_cur;
101         return 0;
102 }
103 
104 static inline int slot_update(struct slot **sl)
105 {
106         int rc;
107         rc = ibmphp_hpc_readslot(*sl, READ_ALLSTAT, NULL);
108         if (rc)
109                 return rc;
110         if (!init_flag)
111                 rc = get_cur_bus_info(sl);
112         return rc;
113 }
114 
115 static int __init get_max_slots (void)
116 {
117         struct slot * slot_cur;
118         struct list_head * tmp;
119         u8 slot_count = 0;
120 
121         list_for_each(tmp, &ibmphp_slot_head) {
122                 slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
123                 /* sometimes the hot-pluggable slots start with 4 (not always from 1) */
124                 slot_count = max(slot_count, slot_cur->number);
125         }
126         return slot_count;
127 }
128 
129 /* This routine will put the correct slot->device information per slot.  It's
130  * called from initialization of the slot structures. It will also assign
131  * interrupt numbers per each slot.
132  * Parameters: struct slot
133  * Returns 0 or errors
134  */
135 int ibmphp_init_devno(struct slot **cur_slot)
136 {
137         struct irq_routing_table *rtable;
138         int len;
139         int loop;
140         int i;
141 
142         rtable = pcibios_get_irq_routing_table();
143         if (!rtable) {
144                 err("no BIOS routing table...\n");
145                 return -ENOMEM;
146         }
147 
148         len = (rtable->size - sizeof(struct irq_routing_table)) /
149                         sizeof(struct irq_info);
150 
151         if (!len) {
152                 kfree(rtable);
153                 return -1;
154         }
155         for (loop = 0; loop < len; loop++) {
156                 if ((*cur_slot)->number == rtable->slots[loop].slot &&
157                     (*cur_slot)->bus == rtable->slots[loop].bus) {
158                         struct io_apic_irq_attr irq_attr;
159 
160                         (*cur_slot)->device = PCI_SLOT(rtable->slots[loop].devfn);
161                         for (i = 0; i < 4; i++)
162                                 (*cur_slot)->irq[i] = IO_APIC_get_PCI_irq_vector((int) (*cur_slot)->bus,
163                                                 (int) (*cur_slot)->device, i,
164                                                 &irq_attr);
165 
166                         debug("(*cur_slot)->irq[0] = %x\n",
167                                         (*cur_slot)->irq[0]);
168                         debug("(*cur_slot)->irq[1] = %x\n",
169                                         (*cur_slot)->irq[1]);
170                         debug("(*cur_slot)->irq[2] = %x\n",
171                                         (*cur_slot)->irq[2]);
172                         debug("(*cur_slot)->irq[3] = %x\n",
173                                         (*cur_slot)->irq[3]);
174 
175                         debug("rtable->exclusive_irqs = %x\n",
176                                         rtable->exclusive_irqs);
177                         debug("rtable->slots[loop].irq[0].bitmap = %x\n",
178                                         rtable->slots[loop].irq[0].bitmap);
179                         debug("rtable->slots[loop].irq[1].bitmap = %x\n",
180                                         rtable->slots[loop].irq[1].bitmap);
181                         debug("rtable->slots[loop].irq[2].bitmap = %x\n",
182                                         rtable->slots[loop].irq[2].bitmap);
183                         debug("rtable->slots[loop].irq[3].bitmap = %x\n",
184                                         rtable->slots[loop].irq[3].bitmap);
185 
186                         debug("rtable->slots[loop].irq[0].link = %x\n",
187                                         rtable->slots[loop].irq[0].link);
188                         debug("rtable->slots[loop].irq[1].link = %x\n",
189                                         rtable->slots[loop].irq[1].link);
190                         debug("rtable->slots[loop].irq[2].link = %x\n",
191                                         rtable->slots[loop].irq[2].link);
192                         debug("rtable->slots[loop].irq[3].link = %x\n",
193                                         rtable->slots[loop].irq[3].link);
194                         debug("end of init_devno\n");
195                         kfree(rtable);
196                         return 0;
197                 }
198         }
199 
200         kfree(rtable);
201         return -1;
202 }
203 
204 static inline int power_on(struct slot *slot_cur)
205 {
206         u8 cmd = HPC_SLOT_ON;
207         int retval;
208 
209         retval = ibmphp_hpc_writeslot(slot_cur, cmd);
210         if (retval) {
211                 err("power on failed\n");
212                 return retval;
213         }
214         if (CTLR_RESULT(slot_cur->ctrl->status)) {
215                 err("command not completed successfully in power_on\n");
216                 return -EIO;
217         }
218         msleep(3000);   /* For ServeRAID cards, and some 66 PCI */
219         return 0;
220 }
221 
222 static inline int power_off(struct slot *slot_cur)
223 {
224         u8 cmd = HPC_SLOT_OFF;
225         int retval;
226 
227         retval = ibmphp_hpc_writeslot(slot_cur, cmd);
228         if (retval) {
229                 err("power off failed\n");
230                 return retval;
231         }
232         if (CTLR_RESULT(slot_cur->ctrl->status)) {
233                 err("command not completed successfully in power_off\n");
234                 retval = -EIO;
235         }
236         return retval;
237 }
238 
239 static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value)
240 {
241         int rc = 0;
242         struct slot *pslot;
243         u8 cmd = 0x00;     /* avoid compiler warning */
244 
245         debug("set_attention_status - Entry hotplug_slot[%lx] value[%x]\n",
246                         (ulong) hotplug_slot, value);
247         ibmphp_lock_operations();
248 
249 
250         if (hotplug_slot) {
251                 switch (value) {
252                 case HPC_SLOT_ATTN_OFF:
253                         cmd = HPC_SLOT_ATTNOFF;
254                         break;
255                 case HPC_SLOT_ATTN_ON:
256                         cmd = HPC_SLOT_ATTNON;
257                         break;
258                 case HPC_SLOT_ATTN_BLINK:
259                         cmd = HPC_SLOT_BLINKLED;
260                         break;
261                 default:
262                         rc = -ENODEV;
263                         err("set_attention_status - Error : invalid input [%x]\n",
264                                         value);
265                         break;
266                 }
267                 if (rc == 0) {
268                         pslot = hotplug_slot->private;
269                         if (pslot)
270                                 rc = ibmphp_hpc_writeslot(pslot, cmd);
271                         else
272                                 rc = -ENODEV;
273                 }
274         } else
275                 rc = -ENODEV;
276 
277         ibmphp_unlock_operations();
278 
279         debug("set_attention_status - Exit rc[%d]\n", rc);
280         return rc;
281 }
282 
283 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 * value)
284 {
285         int rc = -ENODEV;
286         struct slot *pslot;
287         struct slot myslot;
288 
289         debug("get_attention_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
290                                         (ulong) hotplug_slot, (ulong) value);
291 
292         ibmphp_lock_operations();
293         if (hotplug_slot) {
294                 pslot = hotplug_slot->private;
295                 if (pslot) {
296                         memcpy(&myslot, pslot, sizeof(struct slot));
297                         rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
298                                                 &(myslot.status));
299                         if (!rc)
300                                 rc = ibmphp_hpc_readslot(pslot,
301                                                 READ_EXTSLOTSTATUS,
302                                                 &(myslot.ext_status));
303                         if (!rc)
304                                 *value = SLOT_ATTN(myslot.status,
305                                                 myslot.ext_status);
306                 }
307         }
308 
309         ibmphp_unlock_operations();
310         debug("get_attention_status - Exit rc[%d] value[%x]\n", rc, *value);
311         return rc;
312 }
313 
314 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 * value)
315 {
316         int rc = -ENODEV;
317         struct slot *pslot;
318         struct slot myslot;
319 
320         debug("get_latch_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
321                                         (ulong) hotplug_slot, (ulong) value);
322         ibmphp_lock_operations();
323         if (hotplug_slot) {
324                 pslot = hotplug_slot->private;
325                 if (pslot) {
326                         memcpy(&myslot, pslot, sizeof(struct slot));
327                         rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
328                                                 &(myslot.status));
329                         if (!rc)
330                                 *value = SLOT_LATCH(myslot.status);
331                 }
332         }
333 
334         ibmphp_unlock_operations();
335         debug("get_latch_status - Exit rc[%d] rc[%x] value[%x]\n",
336                         rc, rc, *value);
337         return rc;
338 }
339 
340 
341 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 * value)
342 {
343         int rc = -ENODEV;
344         struct slot *pslot;
345         struct slot myslot;
346 
347         debug("get_power_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
348                                         (ulong) hotplug_slot, (ulong) value);
349         ibmphp_lock_operations();
350         if (hotplug_slot) {
351                 pslot = hotplug_slot->private;
352                 if (pslot) {
353                         memcpy(&myslot, pslot, sizeof(struct slot));
354                         rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
355                                                 &(myslot.status));
356                         if (!rc)
357                                 *value = SLOT_PWRGD(myslot.status);
358                 }
359         }
360 
361         ibmphp_unlock_operations();
362         debug("get_power_status - Exit rc[%d] rc[%x] value[%x]\n",
363                         rc, rc, *value);
364         return rc;
365 }
366 
367 static int get_adapter_present(struct hotplug_slot *hotplug_slot, u8 * value)
368 {
369         int rc = -ENODEV;
370         struct slot *pslot;
371         u8 present;
372         struct slot myslot;
373 
374         debug("get_adapter_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
375                                         (ulong) hotplug_slot, (ulong) value);
376         ibmphp_lock_operations();
377         if (hotplug_slot) {
378                 pslot = hotplug_slot->private;
379                 if (pslot) {
380                         memcpy(&myslot, pslot, sizeof(struct slot));
381                         rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
382                                                 &(myslot.status));
383                         if (!rc) {
384                                 present = SLOT_PRESENT(myslot.status);
385                                 if (present == HPC_SLOT_EMPTY)
386                                         *value = 0;
387                                 else
388                                         *value = 1;
389                         }
390                 }
391         }
392 
393         ibmphp_unlock_operations();
394         debug("get_adapter_present - Exit rc[%d] value[%x]\n", rc, *value);
395         return rc;
396 }
397 
398 static int get_max_bus_speed(struct slot *slot)
399 {
400         int rc;
401         u8 mode = 0;
402         enum pci_bus_speed speed;
403         struct pci_bus *bus = slot->hotplug_slot->pci_slot->bus;
404 
405         debug("%s - Entry slot[%p]\n", __func__, slot);
406 
407         ibmphp_lock_operations();
408         mode = slot->supported_bus_mode;
409         speed = slot->supported_speed;
410         ibmphp_unlock_operations();
411 
412         switch (speed) {
413         case BUS_SPEED_33:
414                 break;
415         case BUS_SPEED_66:
416                 if (mode == BUS_MODE_PCIX)
417                         speed += 0x01;
418                 break;
419         case BUS_SPEED_100:
420         case BUS_SPEED_133:
421                 speed += 0x01;
422                 break;
423         default:
424                 /* Note (will need to change): there would be soon 256, 512 also */
425                 rc = -ENODEV;
426         }
427 
428         if (!rc)
429                 bus->max_bus_speed = speed;
430 
431         debug("%s - Exit rc[%d] speed[%x]\n", __func__, rc, speed);
432         return rc;
433 }
434 
435 /*
436 static int get_max_adapter_speed_1(struct hotplug_slot *hotplug_slot, u8 * value, u8 flag)
437 {
438         int rc = -ENODEV;
439         struct slot *pslot;
440         struct slot myslot;
441 
442         debug("get_max_adapter_speed_1 - Entry hotplug_slot[%lx] pvalue[%lx]\n",
443                                                 (ulong)hotplug_slot, (ulong) value);
444 
445         if (flag)
446                 ibmphp_lock_operations();
447 
448         if (hotplug_slot && value) {
449                 pslot = hotplug_slot->private;
450                 if (pslot) {
451                         memcpy(&myslot, pslot, sizeof(struct slot));
452                         rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
453                                                 &(myslot.status));
454 
455                         if (!(SLOT_LATCH (myslot.status)) &&
456                                         (SLOT_PRESENT (myslot.status))) {
457                                 rc = ibmphp_hpc_readslot(pslot,
458                                                 READ_EXTSLOTSTATUS,
459                                                 &(myslot.ext_status));
460                                 if (!rc)
461                                         *value = SLOT_SPEED(myslot.ext_status);
462                         } else
463                                 *value = MAX_ADAPTER_NONE;
464                 }
465         }
466 
467         if (flag)
468                 ibmphp_unlock_operations();
469 
470         debug("get_max_adapter_speed_1 - Exit rc[%d] value[%x]\n", rc, *value);
471         return rc;
472 }
473 
474 static int get_bus_name(struct hotplug_slot *hotplug_slot, char * value)
475 {
476         int rc = -ENODEV;
477         struct slot *pslot = NULL;
478 
479         debug("get_bus_name - Entry hotplug_slot[%lx]\n", (ulong)hotplug_slot);
480 
481         ibmphp_lock_operations();
482 
483         if (hotplug_slot) {
484                 pslot = hotplug_slot->private;
485                 if (pslot) {
486                         rc = 0;
487                         snprintf(value, 100, "Bus %x", pslot->bus);
488                 }
489         } else
490                 rc = -ENODEV;
491 
492         ibmphp_unlock_operations();
493         debug("get_bus_name - Exit rc[%d] value[%x]\n", rc, *value);
494         return rc;
495 }
496 */
497 
498 /****************************************************************************
499  * This routine will initialize the ops data structure used in the validate
500  * function. It will also power off empty slots that are powered on since BIOS
501  * leaves those on, albeit disconnected
502  ****************************************************************************/
503 static int __init init_ops(void)
504 {
505         struct slot *slot_cur;
506         struct list_head *tmp;
507         int retval;
508         int rc;
509 
510         list_for_each(tmp, &ibmphp_slot_head) {
511                 slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
512 
513                 if (!slot_cur)
514                         return -ENODEV;
515 
516                 debug("BEFORE GETTING SLOT STATUS, slot # %x\n",
517                                                         slot_cur->number);
518                 if (slot_cur->ctrl->revision == 0xFF)
519                         if (get_ctrl_revision(slot_cur,
520                                                 &slot_cur->ctrl->revision))
521                                 return -1;
522 
523                 if (slot_cur->bus_on->current_speed == 0xFF)
524                         if (get_cur_bus_info(&slot_cur))
525                                 return -1;
526                 get_max_bus_speed(slot_cur);
527 
528                 if (slot_cur->ctrl->options == 0xFF)
529                         if (get_hpc_options(slot_cur, &slot_cur->ctrl->options))
530                                 return -1;
531 
532                 retval = slot_update(&slot_cur);
533                 if (retval)
534                         return retval;
535 
536                 debug("status = %x\n", slot_cur->status);
537                 debug("ext_status = %x\n", slot_cur->ext_status);
538                 debug("SLOT_POWER = %x\n", SLOT_POWER(slot_cur->status));
539                 debug("SLOT_PRESENT = %x\n", SLOT_PRESENT(slot_cur->status));
540                 debug("SLOT_LATCH = %x\n", SLOT_LATCH(slot_cur->status));
541 
542                 if ((SLOT_PWRGD(slot_cur->status)) &&
543                     !(SLOT_PRESENT(slot_cur->status)) &&
544                     !(SLOT_LATCH(slot_cur->status))) {
545                         debug("BEFORE POWER OFF COMMAND\n");
546                                 rc = power_off(slot_cur);
547                                 if (rc)
548                                         return rc;
549 
550         /*              retval = slot_update(&slot_cur);
551          *              if (retval)
552          *                      return retval;
553          *              ibmphp_update_slot_info(slot_cur);
554          */
555                 }
556         }
557         init_flag = 0;
558         return 0;
559 }
560 
561 /* This operation will check whether the slot is within the bounds and
562  * the operation is valid to perform on that slot
563  * Parameters: slot, operation
564  * Returns: 0 or error codes
565  */
566 static int validate(struct slot *slot_cur, int opn)
567 {
568         int number;
569         int retval;
570 
571         if (!slot_cur)
572                 return -ENODEV;
573         number = slot_cur->number;
574         if ((number > max_slots) || (number < 0))
575                 return -EBADSLT;
576         debug("slot_number in validate is %d\n", slot_cur->number);
577 
578         retval = slot_update(&slot_cur);
579         if (retval)
580                 return retval;
581 
582         switch (opn) {
583                 case ENABLE:
584                         if (!(SLOT_PWRGD(slot_cur->status)) &&
585                              (SLOT_PRESENT(slot_cur->status)) &&
586                              !(SLOT_LATCH(slot_cur->status)))
587                                 return 0;
588                         break;
589                 case DISABLE:
590                         if ((SLOT_PWRGD(slot_cur->status)) &&
591                             (SLOT_PRESENT(slot_cur->status)) &&
592                             !(SLOT_LATCH(slot_cur->status)))
593                                 return 0;
594                         break;
595                 default:
596                         break;
597         }
598         err("validate failed....\n");
599         return -EINVAL;
600 }
601 
602 /****************************************************************************
603  * This routine is for updating the data structures in the hotplug core
604  * Parameters: struct slot
605  * Returns: 0 or error
606  ****************************************************************************/
607 int ibmphp_update_slot_info(struct slot *slot_cur)
608 {
609         struct hotplug_slot_info *info;
610         struct pci_bus *bus = slot_cur->hotplug_slot->pci_slot->bus;
611         int rc;
612         u8 bus_speed;
613         u8 mode;
614 
615         info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
616         if (!info) {
617                 err("out of system memory\n");
618                 return -ENOMEM;
619         }
620 
621         info->power_status = SLOT_PWRGD(slot_cur->status);
622         info->attention_status = SLOT_ATTN(slot_cur->status,
623                                                 slot_cur->ext_status);
624         info->latch_status = SLOT_LATCH(slot_cur->status);
625         if (!SLOT_PRESENT(slot_cur->status)) {
626                 info->adapter_status = 0;
627 /*              info->max_adapter_speed_status = MAX_ADAPTER_NONE; */
628         } else {
629                 info->adapter_status = 1;
630 /*              get_max_adapter_speed_1(slot_cur->hotplug_slot,
631                                         &info->max_adapter_speed_status, 0); */
632         }
633 
634         bus_speed = slot_cur->bus_on->current_speed;
635         mode = slot_cur->bus_on->current_bus_mode;
636 
637         switch (bus_speed) {
638                 case BUS_SPEED_33:
639                         break;
640                 case BUS_SPEED_66:
641                         if (mode == BUS_MODE_PCIX)
642                                 bus_speed += 0x01;
643                         else if (mode == BUS_MODE_PCI)
644                                 ;
645                         else
646                                 bus_speed = PCI_SPEED_UNKNOWN;
647                         break;
648                 case BUS_SPEED_100:
649                 case BUS_SPEED_133:
650                         bus_speed += 0x01;
651                         break;
652                 default:
653                         bus_speed = PCI_SPEED_UNKNOWN;
654         }
655 
656         bus->cur_bus_speed = bus_speed;
657         // To do: bus_names
658 
659         rc = pci_hp_change_slot_info(slot_cur->hotplug_slot, info);
660         kfree(info);
661         return rc;
662 }
663 
664 
665 /******************************************************************************
666  * This function will return the pci_func, given bus and devfunc, or NULL.  It
667  * is called from visit routines
668  ******************************************************************************/
669 
670 static struct pci_func *ibm_slot_find(u8 busno, u8 device, u8 function)
671 {
672         struct pci_func *func_cur;
673         struct slot *slot_cur;
674         struct list_head * tmp;
675         list_for_each(tmp, &ibmphp_slot_head) {
676                 slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
677                 if (slot_cur->func) {
678                         func_cur = slot_cur->func;
679                         while (func_cur) {
680                                 if ((func_cur->busno == busno) &&
681                                                 (func_cur->device == device) &&
682                                                 (func_cur->function == function))
683                                         return func_cur;
684                                 func_cur = func_cur->next;
685                         }
686                 }
687         }
688         return NULL;
689 }
690 
691 /*************************************************************
692  * This routine frees up memory used by struct slot, including
693  * the pointers to pci_func, bus, hotplug_slot, controller,
694  * and deregistering from the hotplug core
695  *************************************************************/
696 static void free_slots(void)
697 {
698         struct slot *slot_cur;
699         struct list_head * tmp;
700         struct list_head * next;
701 
702         debug("%s -- enter\n", __func__);
703 
704         list_for_each_safe(tmp, next, &ibmphp_slot_head) {
705                 slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
706                 pci_hp_deregister(slot_cur->hotplug_slot);
707         }
708         debug("%s -- exit\n", __func__);
709 }
710 
711 static void ibm_unconfigure_device(struct pci_func *func)
712 {
713         struct pci_dev *temp;
714         u8 j;
715 
716         debug("inside %s\n", __func__);
717         debug("func->device = %x, func->function = %x\n",
718                                         func->device, func->function);
719         debug("func->device << 3 | 0x0  = %x\n", func->device << 3 | 0x0);
720 
721         pci_lock_rescan_remove();
722 
723         for (j = 0; j < 0x08; j++) {
724                 temp = pci_get_bus_and_slot(func->busno, (func->device << 3) | j);
725                 if (temp) {
726                         pci_stop_and_remove_bus_device(temp);
727                         pci_dev_put(temp);
728                 }
729         }
730 
731         pci_dev_put(func->dev);
732 
733         pci_unlock_rescan_remove();
734 }
735 
736 /*
737  * The following function is to fix kernel bug regarding
738  * getting bus entries, here we manually add those primary
739  * bus entries to kernel bus structure whenever apply
740  */
741 static u8 bus_structure_fixup(u8 busno)
742 {
743         struct pci_bus *bus;
744         struct pci_dev *dev;
745         u16 l;
746 
747         if (pci_find_bus(0, busno) || !(ibmphp_find_same_bus_num(busno)))
748                 return 1;
749 
750         bus = kmalloc(sizeof(*bus), GFP_KERNEL);
751         if (!bus) {
752                 err("%s - out of memory\n", __func__);
753                 return 1;
754         }
755         dev = kmalloc(sizeof(*dev), GFP_KERNEL);
756         if (!dev) {
757                 kfree(bus);
758                 err("%s - out of memory\n", __func__);
759                 return 1;
760         }
761 
762         bus->number = busno;
763         bus->ops = ibmphp_pci_bus->ops;
764         dev->bus = bus;
765         for (dev->devfn = 0; dev->devfn < 256; dev->devfn += 8) {
766                 if (!pci_read_config_word(dev, PCI_VENDOR_ID, &l) &&
767                                         (l != 0x0000) && (l != 0xffff)) {
768                         debug("%s - Inside bus_structure_fixup()\n",
769                                                         __func__);
770                         pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL);
771                         break;
772                 }
773         }
774 
775         kfree(dev);
776         kfree(bus);
777 
778         return 0;
779 }
780 
781 static int ibm_configure_device(struct pci_func *func)
782 {
783         struct pci_bus *child;
784         int num;
785         int flag = 0;   /* this is to make sure we don't double scan the bus,
786                                         for bridged devices primarily */
787 
788         pci_lock_rescan_remove();
789 
790         if (!(bus_structure_fixup(func->busno)))
791                 flag = 1;
792         if (func->dev == NULL)
793                 func->dev = pci_get_bus_and_slot(func->busno,
794                                 PCI_DEVFN(func->device, func->function));
795 
796         if (func->dev == NULL) {
797                 struct pci_bus *bus = pci_find_bus(0, func->busno);
798                 if (!bus)
799                         goto out;
800 
801                 num = pci_scan_slot(bus,
802                                 PCI_DEVFN(func->device, func->function));
803                 if (num)
804                         pci_bus_add_devices(bus);
805 
806                 func->dev = pci_get_bus_and_slot(func->busno,
807                                 PCI_DEVFN(func->device, func->function));
808                 if (func->dev == NULL) {
809                         err("ERROR... : pci_dev still NULL\n");
810                         goto out;
811                 }
812         }
813         if (!(flag) && (func->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)) {
814                 pci_hp_add_bridge(func->dev);
815                 child = func->dev->subordinate;
816                 if (child)
817                         pci_bus_add_devices(child);
818         }
819 
820  out:
821         pci_unlock_rescan_remove();
822         return 0;
823 }
824 
825 /*******************************************************
826  * Returns whether the bus is empty or not
827  *******************************************************/
828 static int is_bus_empty(struct slot * slot_cur)
829 {
830         int rc;
831         struct slot * tmp_slot;
832         u8 i = slot_cur->bus_on->slot_min;
833 
834         while (i <= slot_cur->bus_on->slot_max) {
835                 if (i == slot_cur->number) {
836                         i++;
837                         continue;
838                 }
839                 tmp_slot = ibmphp_get_slot_from_physical_num(i);
840                 if (!tmp_slot)
841                         return 0;
842                 rc = slot_update(&tmp_slot);
843                 if (rc)
844                         return 0;
845                 if (SLOT_PRESENT(tmp_slot->status) &&
846                                         SLOT_PWRGD(tmp_slot->status))
847                         return 0;
848                 i++;
849         }
850         return 1;
851 }
852 
853 /***********************************************************
854  * If the HPC permits and the bus currently empty, tries to set the
855  * bus speed and mode at the maximum card and bus capability
856  * Parameters: slot
857  * Returns: bus is set (0) or error code
858  ***********************************************************/
859 static int set_bus(struct slot * slot_cur)
860 {
861         int rc;
862         u8 speed;
863         u8 cmd = 0x0;
864         int retval;
865         static struct pci_device_id ciobx[] = {
866                 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, 0x0101) },
867                 { },
868         };
869 
870         debug("%s - entry slot # %d\n", __func__, slot_cur->number);
871         if (SET_BUS_STATUS(slot_cur->ctrl) && is_bus_empty(slot_cur)) {
872                 rc = slot_update(&slot_cur);
873                 if (rc)
874                         return rc;
875                 speed = SLOT_SPEED(slot_cur->ext_status);
876                 debug("ext_status = %x, speed = %x\n", slot_cur->ext_status, speed);
877                 switch (speed) {
878                 case HPC_SLOT_SPEED_33:
879                         cmd = HPC_BUS_33CONVMODE;
880                         break;
881                 case HPC_SLOT_SPEED_66:
882                         if (SLOT_PCIX(slot_cur->ext_status)) {
883                                 if ((slot_cur->supported_speed >= BUS_SPEED_66) &&
884                                                 (slot_cur->supported_bus_mode == BUS_MODE_PCIX))
885                                         cmd = HPC_BUS_66PCIXMODE;
886                                 else if (!SLOT_BUS_MODE(slot_cur->ext_status))
887                                         /* if max slot/bus capability is 66 pci
888                                         and there's no bus mode mismatch, then
889                                         the adapter supports 66 pci */
890                                         cmd = HPC_BUS_66CONVMODE;
891                                 else
892                                         cmd = HPC_BUS_33CONVMODE;
893                         } else {
894                                 if (slot_cur->supported_speed >= BUS_SPEED_66)
895                                         cmd = HPC_BUS_66CONVMODE;
896                                 else
897                                         cmd = HPC_BUS_33CONVMODE;
898                         }
899                         break;
900                 case HPC_SLOT_SPEED_133:
901                         switch (slot_cur->supported_speed) {
902                         case BUS_SPEED_33:
903                                 cmd = HPC_BUS_33CONVMODE;
904                                 break;
905                         case BUS_SPEED_66:
906                                 if (slot_cur->supported_bus_mode == BUS_MODE_PCIX)
907                                         cmd = HPC_BUS_66PCIXMODE;
908                                 else
909                                         cmd = HPC_BUS_66CONVMODE;
910                                 break;
911                         case BUS_SPEED_100:
912                                 cmd = HPC_BUS_100PCIXMODE;
913                                 break;
914                         case BUS_SPEED_133:
915                                 /* This is to take care of the bug in CIOBX chip */
916                                 if (pci_dev_present(ciobx))
917                                         ibmphp_hpc_writeslot(slot_cur,
918                                                         HPC_BUS_100PCIXMODE);
919                                 cmd = HPC_BUS_133PCIXMODE;
920                                 break;
921                         default:
922                                 err("Wrong bus speed\n");
923                                 return -ENODEV;
924                         }
925                         break;
926                 default:
927                         err("wrong slot speed\n");
928                         return -ENODEV;
929                 }
930                 debug("setting bus speed for slot %d, cmd %x\n",
931                                                 slot_cur->number, cmd);
932                 retval = ibmphp_hpc_writeslot(slot_cur, cmd);
933                 if (retval) {
934                         err("setting bus speed failed\n");
935                         return retval;
936                 }
937                 if (CTLR_RESULT(slot_cur->ctrl->status)) {
938                         err("command not completed successfully in set_bus\n");
939                         return -EIO;
940                 }
941         }
942         /* This is for x440, once Brandon fixes the firmware,
943         will not need this delay */
944         msleep(1000);
945         debug("%s -Exit\n", __func__);
946         return 0;
947 }
948 
949 /* This routine checks the bus limitations that the slot is on from the BIOS.
950  * This is used in deciding whether or not to power up the slot.
951  * (electrical/spec limitations. For example, >1 133 MHz or >2 66 PCI cards on
952  * same bus)
953  * Parameters: slot
954  * Returns: 0 = no limitations, -EINVAL = exceeded limitations on the bus
955  */
956 static int check_limitations(struct slot *slot_cur)
957 {
958         u8 i;
959         struct slot * tmp_slot;
960         u8 count = 0;
961         u8 limitation = 0;
962 
963         for (i = slot_cur->bus_on->slot_min; i <= slot_cur->bus_on->slot_max; i++) {
964                 tmp_slot = ibmphp_get_slot_from_physical_num(i);
965                 if (!tmp_slot)
966                         return -ENODEV;
967                 if ((SLOT_PWRGD(tmp_slot->status)) &&
968                                         !(SLOT_CONNECT(tmp_slot->status)))
969                         count++;
970         }
971         get_cur_bus_info(&slot_cur);
972         switch (slot_cur->bus_on->current_speed) {
973         case BUS_SPEED_33:
974                 limitation = slot_cur->bus_on->slots_at_33_conv;
975                 break;
976         case BUS_SPEED_66:
977                 if (slot_cur->bus_on->current_bus_mode == BUS_MODE_PCIX)
978                         limitation = slot_cur->bus_on->slots_at_66_pcix;
979                 else
980                         limitation = slot_cur->bus_on->slots_at_66_conv;
981                 break;
982         case BUS_SPEED_100:
983                 limitation = slot_cur->bus_on->slots_at_100_pcix;
984                 break;
985         case BUS_SPEED_133:
986                 limitation = slot_cur->bus_on->slots_at_133_pcix;
987                 break;
988         }
989 
990         if ((count + 1) > limitation)
991                 return -EINVAL;
992         return 0;
993 }
994 
995 static inline void print_card_capability(struct slot *slot_cur)
996 {
997         info("capability of the card is ");
998         if ((slot_cur->ext_status & CARD_INFO) == PCIX133)
999                 info("   133 MHz PCI-X\n");
1000         else if ((slot_cur->ext_status & CARD_INFO) == PCIX66)
1001                 info("    66 MHz PCI-X\n");
1002         else if ((slot_cur->ext_status & CARD_INFO) == PCI66)
1003                 info("    66 MHz PCI\n");
1004         else
1005                 info("    33 MHz PCI\n");
1006 
1007 }
1008 
1009 /* This routine will power on the slot, configure the device(s) and find the
1010  * drivers for them.
1011  * Parameters: hotplug_slot
1012  * Returns: 0 or failure codes
1013  */
1014 static int enable_slot(struct hotplug_slot *hs)
1015 {
1016         int rc, i, rcpr;
1017         struct slot *slot_cur;
1018         u8 function;
1019         struct pci_func *tmp_func;
1020 
1021         ibmphp_lock_operations();
1022 
1023         debug("ENABLING SLOT........\n");
1024         slot_cur = hs->private;
1025 
1026         if ((rc = validate(slot_cur, ENABLE))) {
1027                 err("validate function failed\n");
1028                 goto error_nopower;
1029         }
1030 
1031         attn_LED_blink(slot_cur);
1032 
1033         rc = set_bus(slot_cur);
1034         if (rc) {
1035                 err("was not able to set the bus\n");
1036                 goto error_nopower;
1037         }
1038 
1039         /*-----------------debugging------------------------------*/
1040         get_cur_bus_info(&slot_cur);
1041         debug("the current bus speed right after set_bus = %x\n",
1042                                         slot_cur->bus_on->current_speed);
1043         /*----------------------------------------------------------*/
1044 
1045         rc = check_limitations(slot_cur);
1046         if (rc) {
1047                 err("Adding this card exceeds the limitations of this bus.\n");
1048                 err("(i.e., >1 133MHz cards running on same bus, or "
1049                      ">2 66 PCI cards running on same bus.\n");
1050                 err("Try hot-adding into another bus\n");
1051                 rc = -EINVAL;
1052                 goto error_nopower;
1053         }
1054 
1055         rc = power_on(slot_cur);
1056 
1057         if (rc) {
1058                 err("something wrong when powering up... please see below for details\n");
1059                 /* need to turn off before on, otherwise, blinking overwrites */
1060                 attn_off(slot_cur);
1061                 attn_on(slot_cur);
1062                 if (slot_update(&slot_cur)) {
1063                         attn_off(slot_cur);
1064                         attn_on(slot_cur);
1065                         rc = -ENODEV;
1066                         goto exit;
1067                 }
1068                 /* Check to see the error of why it failed */
1069                 if ((SLOT_POWER(slot_cur->status)) &&
1070                                         !(SLOT_PWRGD(slot_cur->status)))
1071                         err("power fault occurred trying to power up\n");
1072                 else if (SLOT_BUS_SPEED(slot_cur->status)) {
1073                         err("bus speed mismatch occurred.  please check "
1074                                 "current bus speed and card capability\n");
1075                         print_card_capability(slot_cur);
1076                 } else if (SLOT_BUS_MODE(slot_cur->ext_status)) {
1077                         err("bus mode mismatch occurred.  please check "
1078                                 "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 "
1102                                         "speed and card capability\n");
1103                 print_card_capability(slot_cur);
1104                 goto error_power;
1105         }
1106         /* Don't think this case will happen after above checks...
1107          * but just in case, for paranoia sake */
1108         if (!(SLOT_POWER(slot_cur->status))) {
1109                 err("power on failed...\n");
1110                 goto error_power;
1111         }
1112 
1113         slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1114         if (!slot_cur->func) {
1115                 /* We cannot do update_slot_info here, since no memory for
1116                  * kmalloc n.e.ways, and update_slot_info allocates some */
1117                 err("out of system memory\n");
1118                 rc = -ENOMEM;
1119                 goto error_power;
1120         }
1121         slot_cur->func->busno = slot_cur->bus;
1122         slot_cur->func->device = slot_cur->device;
1123         for (i = 0; i < 4; i++)
1124                 slot_cur->func->irq[i] = slot_cur->irq[i];
1125 
1126         debug("b4 configure_card, slot_cur->bus = %x, slot_cur->device = %x\n",
1127                                         slot_cur->bus, slot_cur->device);
1128 
1129         if (ibmphp_configure_card(slot_cur->func, slot_cur->number)) {
1130                 err("configure_card was unsuccessful...\n");
1131                 /* true because don't need to actually deallocate resources,
1132                  * just remove references */
1133                 ibmphp_unconfigure_card(&slot_cur, 1);
1134                 debug("after unconfigure_card\n");
1135                 slot_cur->func = NULL;
1136                 rc = -ENOMEM;
1137                 goto error_power;
1138         }
1139 
1140         function = 0x00;
1141         do {
1142                 tmp_func = ibm_slot_find(slot_cur->bus, slot_cur->func->device,
1143                                                         function++);
1144                 if (tmp_func && !(tmp_func->dev))
1145                         ibm_configure_device(tmp_func);
1146         } while (tmp_func);
1147 
1148         attn_off(slot_cur);
1149         if (slot_update(&slot_cur)) {
1150                 rc = -EFAULT;
1151                 goto exit;
1152         }
1153         ibmphp_print_test();
1154         rc = ibmphp_update_slot_info(slot_cur);
1155 exit:
1156         ibmphp_unlock_operations();
1157         return rc;
1158 
1159 error_nopower:
1160         attn_off(slot_cur);     /* need to turn off if was blinking b4 */
1161         attn_on(slot_cur);
1162 error_cont:
1163         rcpr = slot_update(&slot_cur);
1164         if (rcpr) {
1165                 rc = rcpr;
1166                 goto exit;
1167         }
1168         ibmphp_update_slot_info(slot_cur);
1169         goto exit;
1170 
1171 error_power:
1172         attn_off(slot_cur);     /* need to turn off if was blinking b4 */
1173         attn_on(slot_cur);
1174         rcpr = power_off(slot_cur);
1175         if (rcpr) {
1176                 rc = rcpr;
1177                 goto exit;
1178         }
1179         goto error_cont;
1180 }
1181 
1182 /**************************************************************
1183 * HOT REMOVING ADAPTER CARD                                   *
1184 * INPUT: POINTER TO THE HOTPLUG SLOT STRUCTURE                *
1185 * OUTPUT: SUCCESS 0 ; FAILURE: UNCONFIGURE , VALIDATE         *
1186           DISABLE POWER ,                                    *
1187 **************************************************************/
1188 static int ibmphp_disable_slot(struct hotplug_slot *hotplug_slot)
1189 {
1190         struct slot *slot = hotplug_slot->private;
1191         int rc;
1192 
1193         ibmphp_lock_operations();
1194         rc = ibmphp_do_disable_slot(slot);
1195         ibmphp_unlock_operations();
1196         return rc;
1197 }
1198 
1199 int ibmphp_do_disable_slot(struct slot *slot_cur)
1200 {
1201         int rc;
1202         u8 flag;
1203 
1204         debug("DISABLING SLOT...\n");
1205 
1206         if ((slot_cur == NULL) || (slot_cur->ctrl == NULL)) {
1207                 return -ENODEV;
1208         }
1209 
1210         flag = slot_cur->flag;
1211         slot_cur->flag = 1;
1212 
1213         if (flag == 1) {
1214                 rc = validate(slot_cur, DISABLE);
1215                         /* checking if powered off already & valid slot # */
1216                 if (rc)
1217                         goto error;
1218         }
1219         attn_LED_blink(slot_cur);
1220 
1221         if (slot_cur->func == NULL) {
1222                 /* We need this for functions that were there on bootup */
1223                 slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1224                 if (!slot_cur->func) {
1225                         err("out of system memory\n");
1226                         rc = -ENOMEM;
1227                         goto error;
1228                 }
1229                 slot_cur->func->busno = slot_cur->bus;
1230                 slot_cur->func->device = slot_cur->device;
1231         }
1232 
1233         ibm_unconfigure_device(slot_cur->func);
1234 
1235         /*
1236          * If we got here from latch suddenly opening on operating card or
1237          * a power fault, there's no power to the card, so cannot
1238          * read from it to determine what resources it occupied.  This operation
1239          * is forbidden anyhow.  The best we can do is remove it from kernel
1240          * lists at least */
1241 
1242         if (!flag) {
1243                 attn_off(slot_cur);
1244                 return 0;
1245         }
1246 
1247         rc = ibmphp_unconfigure_card(&slot_cur, 0);
1248         slot_cur->func = NULL;
1249         debug("in disable_slot. after unconfigure_card\n");
1250         if (rc) {
1251                 err("could not unconfigure card.\n");
1252                 goto error;
1253         }
1254 
1255         rc = ibmphp_hpc_writeslot(slot_cur, HPC_SLOT_OFF);
1256         if (rc)
1257                 goto error;
1258 
1259         attn_off(slot_cur);
1260         rc = slot_update(&slot_cur);
1261         if (rc)
1262                 goto exit;
1263 
1264         rc = ibmphp_update_slot_info(slot_cur);
1265         ibmphp_print_test();
1266 exit:
1267         return rc;
1268 
1269 error:
1270         /*  Need to turn off if was blinking b4 */
1271         attn_off(slot_cur);
1272         attn_on(slot_cur);
1273         if (slot_update(&slot_cur)) {
1274                 rc = -EFAULT;
1275                 goto exit;
1276         }
1277         if (flag)
1278                 ibmphp_update_slot_info(slot_cur);
1279         goto exit;
1280 }
1281 
1282 struct hotplug_slot_ops ibmphp_hotplug_slot_ops = {
1283         .set_attention_status =         set_attention_status,
1284         .enable_slot =                  enable_slot,
1285         .disable_slot =                 ibmphp_disable_slot,
1286         .hardware_test =                NULL,
1287         .get_power_status =             get_power_status,
1288         .get_attention_status =         get_attention_status,
1289         .get_latch_status =             get_latch_status,
1290         .get_adapter_status =           get_adapter_present,
1291 /*      .get_max_adapter_speed =        get_max_adapter_speed,
1292         .get_bus_name_status =          get_bus_name,
1293 */
1294 };
1295 
1296 static void ibmphp_unload(void)
1297 {
1298         free_slots();
1299         debug("after slots\n");
1300         ibmphp_free_resources();
1301         debug("after resources\n");
1302         ibmphp_free_bus_info_queue();
1303         debug("after bus info\n");
1304         ibmphp_free_ebda_hpc_queue();
1305         debug("after ebda hpc\n");
1306         ibmphp_free_ebda_pci_rsrc_queue();
1307         debug("after ebda pci rsrc\n");
1308         kfree(ibmphp_pci_bus);
1309 }
1310 
1311 static int __init ibmphp_init(void)
1312 {
1313         struct pci_bus *bus;
1314         int i = 0;
1315         int rc = 0;
1316 
1317         init_flag = 1;
1318 
1319         info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
1320 
1321         ibmphp_pci_bus = kmalloc(sizeof(*ibmphp_pci_bus), GFP_KERNEL);
1322         if (!ibmphp_pci_bus) {
1323                 err("out of memory\n");
1324                 rc = -ENOMEM;
1325                 goto exit;
1326         }
1327 
1328         bus = pci_find_bus(0, 0);
1329         if (!bus) {
1330                 err("Can't find the root pci bus, can not continue\n");
1331                 rc = -ENODEV;
1332                 goto error;
1333         }
1334         memcpy(ibmphp_pci_bus, bus, sizeof(*ibmphp_pci_bus));
1335 
1336         ibmphp_debug = debug;
1337 
1338         ibmphp_hpc_initvars();
1339 
1340         for (i = 0; i < 16; i++)
1341                 irqs[i] = 0;
1342 
1343         if ((rc = ibmphp_access_ebda()))
1344                 goto error;
1345         debug("after ibmphp_access_ebda()\n");
1346 
1347         if ((rc = ibmphp_rsrc_init()))
1348                 goto error;
1349         debug("AFTER Resource & EBDA INITIALIZATIONS\n");
1350 
1351         max_slots = get_max_slots();
1352 
1353         if ((rc = ibmphp_register_pci()))
1354                 goto error;
1355 
1356         if (init_ops()) {
1357                 rc = -ENODEV;
1358                 goto error;
1359         }
1360 
1361         ibmphp_print_test();
1362         if ((rc = ibmphp_hpc_start_poll_thread())) {
1363                 goto error;
1364         }
1365 
1366 exit:
1367         return rc;
1368 
1369 error:
1370         ibmphp_unload();
1371         goto exit;
1372 }
1373 
1374 static void __exit ibmphp_exit(void)
1375 {
1376         ibmphp_hpc_stop_poll_thread();
1377         debug("after polling\n");
1378         ibmphp_unload();
1379         debug("done\n");
1380 }
1381 
1382 module_init(ibmphp_init);
1383 module_exit(ibmphp_exit);
1384 

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