Version:  2.0.40 2.2.26 2.4.37 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0

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;
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                         pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL);
769                         break;
770                 }
771         }
772 
773         kfree(dev);
774         kfree(bus);
775 
776         return 0;
777 }
778 
779 static int ibm_configure_device(struct pci_func *func)
780 {
781         struct pci_bus *child;
782         int num;
783         int flag = 0;   /* this is to make sure we don't double scan the bus,
784                                         for bridged devices primarily */
785 
786         pci_lock_rescan_remove();
787 
788         if (!(bus_structure_fixup(func->busno)))
789                 flag = 1;
790         if (func->dev == NULL)
791                 func->dev = pci_get_bus_and_slot(func->busno,
792                                 PCI_DEVFN(func->device, func->function));
793 
794         if (func->dev == NULL) {
795                 struct pci_bus *bus = pci_find_bus(0, func->busno);
796                 if (!bus)
797                         goto out;
798 
799                 num = pci_scan_slot(bus,
800                                 PCI_DEVFN(func->device, func->function));
801                 if (num)
802                         pci_bus_add_devices(bus);
803 
804                 func->dev = pci_get_bus_and_slot(func->busno,
805                                 PCI_DEVFN(func->device, func->function));
806                 if (func->dev == NULL) {
807                         err("ERROR... : pci_dev still NULL\n");
808                         goto out;
809                 }
810         }
811         if (!(flag) && (func->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)) {
812                 pci_hp_add_bridge(func->dev);
813                 child = func->dev->subordinate;
814                 if (child)
815                         pci_bus_add_devices(child);
816         }
817 
818  out:
819         pci_unlock_rescan_remove();
820         return 0;
821 }
822 
823 /*******************************************************
824  * Returns whether the bus is empty or not
825  *******************************************************/
826 static int is_bus_empty(struct slot *slot_cur)
827 {
828         int rc;
829         struct slot *tmp_slot;
830         u8 i = slot_cur->bus_on->slot_min;
831 
832         while (i <= slot_cur->bus_on->slot_max) {
833                 if (i == slot_cur->number) {
834                         i++;
835                         continue;
836                 }
837                 tmp_slot = ibmphp_get_slot_from_physical_num(i);
838                 if (!tmp_slot)
839                         return 0;
840                 rc = slot_update(&tmp_slot);
841                 if (rc)
842                         return 0;
843                 if (SLOT_PRESENT(tmp_slot->status) &&
844                                         SLOT_PWRGD(tmp_slot->status))
845                         return 0;
846                 i++;
847         }
848         return 1;
849 }
850 
851 /***********************************************************
852  * If the HPC permits and the bus currently empty, tries to set the
853  * bus speed and mode at the maximum card and bus capability
854  * Parameters: slot
855  * Returns: bus is set (0) or error code
856  ***********************************************************/
857 static int set_bus(struct slot *slot_cur)
858 {
859         int rc;
860         u8 speed;
861         u8 cmd = 0x0;
862         int retval;
863         static struct pci_device_id ciobx[] = {
864                 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, 0x0101) },
865                 { },
866         };
867 
868         debug("%s - entry slot # %d\n", __func__, slot_cur->number);
869         if (SET_BUS_STATUS(slot_cur->ctrl) && is_bus_empty(slot_cur)) {
870                 rc = slot_update(&slot_cur);
871                 if (rc)
872                         return rc;
873                 speed = SLOT_SPEED(slot_cur->ext_status);
874                 debug("ext_status = %x, speed = %x\n", slot_cur->ext_status, speed);
875                 switch (speed) {
876                 case HPC_SLOT_SPEED_33:
877                         cmd = HPC_BUS_33CONVMODE;
878                         break;
879                 case HPC_SLOT_SPEED_66:
880                         if (SLOT_PCIX(slot_cur->ext_status)) {
881                                 if ((slot_cur->supported_speed >= BUS_SPEED_66) &&
882                                                 (slot_cur->supported_bus_mode == BUS_MODE_PCIX))
883                                         cmd = HPC_BUS_66PCIXMODE;
884                                 else if (!SLOT_BUS_MODE(slot_cur->ext_status))
885                                         /* if max slot/bus capability is 66 pci
886                                         and there's no bus mode mismatch, then
887                                         the adapter supports 66 pci */
888                                         cmd = HPC_BUS_66CONVMODE;
889                                 else
890                                         cmd = HPC_BUS_33CONVMODE;
891                         } else {
892                                 if (slot_cur->supported_speed >= BUS_SPEED_66)
893                                         cmd = HPC_BUS_66CONVMODE;
894                                 else
895                                         cmd = HPC_BUS_33CONVMODE;
896                         }
897                         break;
898                 case HPC_SLOT_SPEED_133:
899                         switch (slot_cur->supported_speed) {
900                         case BUS_SPEED_33:
901                                 cmd = HPC_BUS_33CONVMODE;
902                                 break;
903                         case BUS_SPEED_66:
904                                 if (slot_cur->supported_bus_mode == BUS_MODE_PCIX)
905                                         cmd = HPC_BUS_66PCIXMODE;
906                                 else
907                                         cmd = HPC_BUS_66CONVMODE;
908                                 break;
909                         case BUS_SPEED_100:
910                                 cmd = HPC_BUS_100PCIXMODE;
911                                 break;
912                         case BUS_SPEED_133:
913                                 /* This is to take care of the bug in CIOBX chip */
914                                 if (pci_dev_present(ciobx))
915                                         ibmphp_hpc_writeslot(slot_cur,
916                                                         HPC_BUS_100PCIXMODE);
917                                 cmd = HPC_BUS_133PCIXMODE;
918                                 break;
919                         default:
920                                 err("Wrong bus speed\n");
921                                 return -ENODEV;
922                         }
923                         break;
924                 default:
925                         err("wrong slot speed\n");
926                         return -ENODEV;
927                 }
928                 debug("setting bus speed for slot %d, cmd %x\n",
929                                                 slot_cur->number, cmd);
930                 retval = ibmphp_hpc_writeslot(slot_cur, cmd);
931                 if (retval) {
932                         err("setting bus speed failed\n");
933                         return retval;
934                 }
935                 if (CTLR_RESULT(slot_cur->ctrl->status)) {
936                         err("command not completed successfully in set_bus\n");
937                         return -EIO;
938                 }
939         }
940         /* This is for x440, once Brandon fixes the firmware,
941         will not need this delay */
942         msleep(1000);
943         debug("%s -Exit\n", __func__);
944         return 0;
945 }
946 
947 /* This routine checks the bus limitations that the slot is on from the BIOS.
948  * This is used in deciding whether or not to power up the slot.
949  * (electrical/spec limitations. For example, >1 133 MHz or >2 66 PCI cards on
950  * same bus)
951  * Parameters: slot
952  * Returns: 0 = no limitations, -EINVAL = exceeded limitations on the bus
953  */
954 static int check_limitations(struct slot *slot_cur)
955 {
956         u8 i;
957         struct slot *tmp_slot;
958         u8 count = 0;
959         u8 limitation = 0;
960 
961         for (i = slot_cur->bus_on->slot_min; i <= slot_cur->bus_on->slot_max; i++) {
962                 tmp_slot = ibmphp_get_slot_from_physical_num(i);
963                 if (!tmp_slot)
964                         return -ENODEV;
965                 if ((SLOT_PWRGD(tmp_slot->status)) &&
966                                         !(SLOT_CONNECT(tmp_slot->status)))
967                         count++;
968         }
969         get_cur_bus_info(&slot_cur);
970         switch (slot_cur->bus_on->current_speed) {
971         case BUS_SPEED_33:
972                 limitation = slot_cur->bus_on->slots_at_33_conv;
973                 break;
974         case BUS_SPEED_66:
975                 if (slot_cur->bus_on->current_bus_mode == BUS_MODE_PCIX)
976                         limitation = slot_cur->bus_on->slots_at_66_pcix;
977                 else
978                         limitation = slot_cur->bus_on->slots_at_66_conv;
979                 break;
980         case BUS_SPEED_100:
981                 limitation = slot_cur->bus_on->slots_at_100_pcix;
982                 break;
983         case BUS_SPEED_133:
984                 limitation = slot_cur->bus_on->slots_at_133_pcix;
985                 break;
986         }
987 
988         if ((count + 1) > limitation)
989                 return -EINVAL;
990         return 0;
991 }
992 
993 static inline void print_card_capability(struct slot *slot_cur)
994 {
995         info("capability of the card is ");
996         if ((slot_cur->ext_status & CARD_INFO) == PCIX133)
997                 info("   133 MHz PCI-X\n");
998         else if ((slot_cur->ext_status & CARD_INFO) == PCIX66)
999                 info("    66 MHz PCI-X\n");
1000         else if ((slot_cur->ext_status & CARD_INFO) == PCI66)
1001                 info("    66 MHz PCI\n");
1002         else
1003                 info("    33 MHz PCI\n");
1004 
1005 }
1006 
1007 /* This routine will power on the slot, configure the device(s) and find the
1008  * drivers for them.
1009  * Parameters: hotplug_slot
1010  * Returns: 0 or failure codes
1011  */
1012 static int enable_slot(struct hotplug_slot *hs)
1013 {
1014         int rc, i, rcpr;
1015         struct slot *slot_cur;
1016         u8 function;
1017         struct pci_func *tmp_func;
1018 
1019         ibmphp_lock_operations();
1020 
1021         debug("ENABLING SLOT........\n");
1022         slot_cur = hs->private;
1023 
1024         rc = validate(slot_cur, ENABLE);
1025         if (rc) {
1026                 err("validate function failed\n");
1027                 goto error_nopower;
1028         }
1029 
1030         attn_LED_blink(slot_cur);
1031 
1032         rc = set_bus(slot_cur);
1033         if (rc) {
1034                 err("was not able to set the bus\n");
1035                 goto error_nopower;
1036         }
1037 
1038         /*-----------------debugging------------------------------*/
1039         get_cur_bus_info(&slot_cur);
1040         debug("the current bus speed right after set_bus = %x\n",
1041                                         slot_cur->bus_on->current_speed);
1042         /*----------------------------------------------------------*/
1043 
1044         rc = check_limitations(slot_cur);
1045         if (rc) {
1046                 err("Adding this card exceeds the limitations of this bus.\n");
1047                 err("(i.e., >1 133MHz cards running on same bus, or >2 66 PCI cards running on same bus.\n");
1048                 err("Try hot-adding into another bus\n");
1049                 rc = -EINVAL;
1050                 goto error_nopower;
1051         }
1052 
1053         rc = power_on(slot_cur);
1054 
1055         if (rc) {
1056                 err("something wrong when powering up... please see below for details\n");
1057                 /* need to turn off before on, otherwise, blinking overwrites */
1058                 attn_off(slot_cur);
1059                 attn_on(slot_cur);
1060                 if (slot_update(&slot_cur)) {
1061                         attn_off(slot_cur);
1062                         attn_on(slot_cur);
1063                         rc = -ENODEV;
1064                         goto exit;
1065                 }
1066                 /* Check to see the error of why it failed */
1067                 if ((SLOT_POWER(slot_cur->status)) &&
1068                                         !(SLOT_PWRGD(slot_cur->status)))
1069                         err("power fault occurred trying to power up\n");
1070                 else if (SLOT_BUS_SPEED(slot_cur->status)) {
1071                         err("bus speed mismatch occurred.  please check current bus speed and card capability\n");
1072                         print_card_capability(slot_cur);
1073                 } else if (SLOT_BUS_MODE(slot_cur->ext_status)) {
1074                         err("bus mode mismatch occurred.  please check current bus mode and card capability\n");
1075                         print_card_capability(slot_cur);
1076                 }
1077                 ibmphp_update_slot_info(slot_cur);
1078                 goto exit;
1079         }
1080         debug("after power_on\n");
1081         /*-----------------------debugging---------------------------*/
1082         get_cur_bus_info(&slot_cur);
1083         debug("the current bus speed right after power_on = %x\n",
1084                                         slot_cur->bus_on->current_speed);
1085         /*----------------------------------------------------------*/
1086 
1087         rc = slot_update(&slot_cur);
1088         if (rc)
1089                 goto error_power;
1090 
1091         rc = -EINVAL;
1092         if (SLOT_POWER(slot_cur->status) && !(SLOT_PWRGD(slot_cur->status))) {
1093                 err("power fault occurred trying to power up...\n");
1094                 goto error_power;
1095         }
1096         if (SLOT_POWER(slot_cur->status) && (SLOT_BUS_SPEED(slot_cur->status))) {
1097                 err("bus speed mismatch occurred.  please check current bus speed and card capability\n");
1098                 print_card_capability(slot_cur);
1099                 goto error_power;
1100         }
1101         /* Don't think this case will happen after above checks...
1102          * but just in case, for paranoia sake */
1103         if (!(SLOT_POWER(slot_cur->status))) {
1104                 err("power on failed...\n");
1105                 goto error_power;
1106         }
1107 
1108         slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1109         if (!slot_cur->func) {
1110                 /* We cannot do update_slot_info here, since no memory for
1111                  * kmalloc n.e.ways, and update_slot_info allocates some */
1112                 err("out of system memory\n");
1113                 rc = -ENOMEM;
1114                 goto error_power;
1115         }
1116         slot_cur->func->busno = slot_cur->bus;
1117         slot_cur->func->device = slot_cur->device;
1118         for (i = 0; i < 4; i++)
1119                 slot_cur->func->irq[i] = slot_cur->irq[i];
1120 
1121         debug("b4 configure_card, slot_cur->bus = %x, slot_cur->device = %x\n",
1122                                         slot_cur->bus, slot_cur->device);
1123 
1124         if (ibmphp_configure_card(slot_cur->func, slot_cur->number)) {
1125                 err("configure_card was unsuccessful...\n");
1126                 /* true because don't need to actually deallocate resources,
1127                  * just remove references */
1128                 ibmphp_unconfigure_card(&slot_cur, 1);
1129                 debug("after unconfigure_card\n");
1130                 slot_cur->func = NULL;
1131                 rc = -ENOMEM;
1132                 goto error_power;
1133         }
1134 
1135         function = 0x00;
1136         do {
1137                 tmp_func = ibm_slot_find(slot_cur->bus, slot_cur->func->device,
1138                                                         function++);
1139                 if (tmp_func && !(tmp_func->dev))
1140                         ibm_configure_device(tmp_func);
1141         } while (tmp_func);
1142 
1143         attn_off(slot_cur);
1144         if (slot_update(&slot_cur)) {
1145                 rc = -EFAULT;
1146                 goto exit;
1147         }
1148         ibmphp_print_test();
1149         rc = ibmphp_update_slot_info(slot_cur);
1150 exit:
1151         ibmphp_unlock_operations();
1152         return rc;
1153 
1154 error_nopower:
1155         attn_off(slot_cur);     /* need to turn off if was blinking b4 */
1156         attn_on(slot_cur);
1157 error_cont:
1158         rcpr = slot_update(&slot_cur);
1159         if (rcpr) {
1160                 rc = rcpr;
1161                 goto exit;
1162         }
1163         ibmphp_update_slot_info(slot_cur);
1164         goto exit;
1165 
1166 error_power:
1167         attn_off(slot_cur);     /* need to turn off if was blinking b4 */
1168         attn_on(slot_cur);
1169         rcpr = power_off(slot_cur);
1170         if (rcpr) {
1171                 rc = rcpr;
1172                 goto exit;
1173         }
1174         goto error_cont;
1175 }
1176 
1177 /**************************************************************
1178 * HOT REMOVING ADAPTER CARD                                   *
1179 * INPUT: POINTER TO THE HOTPLUG SLOT STRUCTURE                *
1180 * OUTPUT: SUCCESS 0 ; FAILURE: UNCONFIGURE , VALIDATE         *
1181           DISABLE POWER ,                                    *
1182 **************************************************************/
1183 static int ibmphp_disable_slot(struct hotplug_slot *hotplug_slot)
1184 {
1185         struct slot *slot = hotplug_slot->private;
1186         int rc;
1187 
1188         ibmphp_lock_operations();
1189         rc = ibmphp_do_disable_slot(slot);
1190         ibmphp_unlock_operations();
1191         return rc;
1192 }
1193 
1194 int ibmphp_do_disable_slot(struct slot *slot_cur)
1195 {
1196         int rc;
1197         u8 flag;
1198 
1199         debug("DISABLING SLOT...\n");
1200 
1201         if ((slot_cur == NULL) || (slot_cur->ctrl == NULL))
1202                 return -ENODEV;
1203 
1204         flag = slot_cur->flag;
1205         slot_cur->flag = 1;
1206 
1207         if (flag == 1) {
1208                 rc = validate(slot_cur, DISABLE);
1209                         /* checking if powered off already & valid slot # */
1210                 if (rc)
1211                         goto error;
1212         }
1213         attn_LED_blink(slot_cur);
1214 
1215         if (slot_cur->func == NULL) {
1216                 /* We need this for functions that were there on bootup */
1217                 slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1218                 if (!slot_cur->func) {
1219                         err("out of system memory\n");
1220                         rc = -ENOMEM;
1221                         goto error;
1222                 }
1223                 slot_cur->func->busno = slot_cur->bus;
1224                 slot_cur->func->device = slot_cur->device;
1225         }
1226 
1227         ibm_unconfigure_device(slot_cur->func);
1228 
1229         /*
1230          * If we got here from latch suddenly opening on operating card or
1231          * a power fault, there's no power to the card, so cannot
1232          * read from it to determine what resources it occupied.  This operation
1233          * is forbidden anyhow.  The best we can do is remove it from kernel
1234          * lists at least */
1235 
1236         if (!flag) {
1237                 attn_off(slot_cur);
1238                 return 0;
1239         }
1240 
1241         rc = ibmphp_unconfigure_card(&slot_cur, 0);
1242         slot_cur->func = NULL;
1243         debug("in disable_slot. after unconfigure_card\n");
1244         if (rc) {
1245                 err("could not unconfigure card.\n");
1246                 goto error;
1247         }
1248 
1249         rc = ibmphp_hpc_writeslot(slot_cur, HPC_SLOT_OFF);
1250         if (rc)
1251                 goto error;
1252 
1253         attn_off(slot_cur);
1254         rc = slot_update(&slot_cur);
1255         if (rc)
1256                 goto exit;
1257 
1258         rc = ibmphp_update_slot_info(slot_cur);
1259         ibmphp_print_test();
1260 exit:
1261         return rc;
1262 
1263 error:
1264         /*  Need to turn off if was blinking b4 */
1265         attn_off(slot_cur);
1266         attn_on(slot_cur);
1267         if (slot_update(&slot_cur)) {
1268                 rc = -EFAULT;
1269                 goto exit;
1270         }
1271         if (flag)
1272                 ibmphp_update_slot_info(slot_cur);
1273         goto exit;
1274 }
1275 
1276 struct hotplug_slot_ops ibmphp_hotplug_slot_ops = {
1277         .set_attention_status =         set_attention_status,
1278         .enable_slot =                  enable_slot,
1279         .disable_slot =                 ibmphp_disable_slot,
1280         .hardware_test =                NULL,
1281         .get_power_status =             get_power_status,
1282         .get_attention_status =         get_attention_status,
1283         .get_latch_status =             get_latch_status,
1284         .get_adapter_status =           get_adapter_present,
1285 /*      .get_max_adapter_speed =        get_max_adapter_speed,
1286         .get_bus_name_status =          get_bus_name,
1287 */
1288 };
1289 
1290 static void ibmphp_unload(void)
1291 {
1292         free_slots();
1293         debug("after slots\n");
1294         ibmphp_free_resources();
1295         debug("after resources\n");
1296         ibmphp_free_bus_info_queue();
1297         debug("after bus info\n");
1298         ibmphp_free_ebda_hpc_queue();
1299         debug("after ebda hpc\n");
1300         ibmphp_free_ebda_pci_rsrc_queue();
1301         debug("after ebda pci rsrc\n");
1302         kfree(ibmphp_pci_bus);
1303 }
1304 
1305 static int __init ibmphp_init(void)
1306 {
1307         struct pci_bus *bus;
1308         int i = 0;
1309         int rc = 0;
1310 
1311         init_flag = 1;
1312 
1313         info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
1314 
1315         ibmphp_pci_bus = kmalloc(sizeof(*ibmphp_pci_bus), GFP_KERNEL);
1316         if (!ibmphp_pci_bus) {
1317                 err("out of memory\n");
1318                 rc = -ENOMEM;
1319                 goto exit;
1320         }
1321 
1322         bus = pci_find_bus(0, 0);
1323         if (!bus) {
1324                 err("Can't find the root pci bus, can not continue\n");
1325                 rc = -ENODEV;
1326                 goto error;
1327         }
1328         memcpy(ibmphp_pci_bus, bus, sizeof(*ibmphp_pci_bus));
1329 
1330         ibmphp_debug = debug;
1331 
1332         ibmphp_hpc_initvars();
1333 
1334         for (i = 0; i < 16; i++)
1335                 irqs[i] = 0;
1336 
1337         rc = ibmphp_access_ebda();
1338         if (rc)
1339                 goto error;
1340         debug("after ibmphp_access_ebda()\n");
1341 
1342         rc = ibmphp_rsrc_init();
1343         if (rc)
1344                 goto error;
1345         debug("AFTER Resource & EBDA INITIALIZATIONS\n");
1346 
1347         max_slots = get_max_slots();
1348 
1349         rc = ibmphp_register_pci();
1350         if (rc)
1351                 goto error;
1352 
1353         if (init_ops()) {
1354                 rc = -ENODEV;
1355                 goto error;
1356         }
1357 
1358         ibmphp_print_test();
1359         rc = ibmphp_hpc_start_poll_thread();
1360         if (rc)
1361                 goto error;
1362 
1363 exit:
1364         return rc;
1365 
1366 error:
1367         ibmphp_unload();
1368         goto exit;
1369 }
1370 
1371 static void __exit ibmphp_exit(void)
1372 {
1373         ibmphp_hpc_stop_poll_thread();
1374         debug("after polling\n");
1375         ibmphp_unload();
1376         debug("done\n");
1377 }
1378 
1379 module_init(ibmphp_init);
1380 module_exit(ibmphp_exit);
1381 

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