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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / pci / hotplug / ibmphp_ebda.c
blob11a2661dc06277319e0cd2ed873cd4b6408bdebc
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * IBM Hot Plug Controller Driver
4 *
5 * Written By: Tong Yu, IBM Corporation
6 *
7 * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
8 * Copyright (C) 2001-2003 IBM Corp.
9 *
10 * All rights reserved.
11 *
12 * Send feedback to <gregkh@us.ibm.com>
13 *
14 */
15
16 #include <linux/module.h>
17 #include <linux/errno.h>
18 #include <linux/mm.h>
19 #include <linux/slab.h>
20 #include <linux/pci.h>
21 #include <linux/list.h>
22 #include <linux/init.h>
23 #include "ibmphp.h"
24
25 /*
26 * POST builds data blocks(in this data block definition, a char-1
27 * byte, short(or word)-2 byte, long(dword)-4 byte) in the Extended
28 * BIOS Data Area which describe the configuration of the hot-plug
29 * controllers and resources used by the PCI Hot-Plug devices.
30 *
31 * This file walks EBDA, maps data block from physical addr,
32 * reconstruct linked lists about all system resource(MEM, PFM, IO)
33 * already assigned by POST, as well as linked lists about hot plug
34 * controllers (ctlr#, slot#, bus&slot features...)
35 */
36
37 /* Global lists */
38 LIST_HEAD(ibmphp_ebda_pci_rsrc_head);
39 LIST_HEAD(ibmphp_slot_head);
40
41 /* Local variables */
42 static struct ebda_hpc_list *hpc_list_ptr;
43 static struct ebda_rsrc_list *rsrc_list_ptr;
44 static struct rio_table_hdr *rio_table_ptr = NULL;
45 static LIST_HEAD(ebda_hpc_head);
46 static LIST_HEAD(bus_info_head);
47 static LIST_HEAD(rio_vg_head);
48 static LIST_HEAD(rio_lo_head);
49 static LIST_HEAD(opt_vg_head);
50 static LIST_HEAD(opt_lo_head);
51 static void __iomem *io_mem;
52
53 /* Local functions */
54 static int ebda_rsrc_controller(void);
55 static int ebda_rsrc_rsrc(void);
56 static int ebda_rio_table(void);
57
58 static struct ebda_hpc_list * __init alloc_ebda_hpc_list(void)
59 {
60 return kzalloc(sizeof(struct ebda_hpc_list), GFP_KERNEL);
61 }
62
63 static struct controller *alloc_ebda_hpc(u32 slot_count, u32 bus_count)
64 {
65 struct controller *controller;
66 struct ebda_hpc_slot *slots;
67 struct ebda_hpc_bus *buses;
68
69 controller = kzalloc(sizeof(struct controller), GFP_KERNEL);
70 if (!controller)
71 goto error;
72
73 slots = kcalloc(slot_count, sizeof(struct ebda_hpc_slot), GFP_KERNEL);
74 if (!slots)
75 goto error_contr;
76 controller->slots = slots;
77
78 buses = kcalloc(bus_count, sizeof(struct ebda_hpc_bus), GFP_KERNEL);
79 if (!buses)
80 goto error_slots;
81 controller->buses = buses;
82
83 return controller;
84 error_slots:
85 kfree(controller->slots);
86 error_contr:
87 kfree(controller);
88 error:
89 return NULL;
90 }
91
92 static void free_ebda_hpc(struct controller *controller)
93 {
94 kfree(controller->slots);
95 kfree(controller->buses);
96 kfree(controller);
97 }
98
99 static struct ebda_rsrc_list * __init alloc_ebda_rsrc_list(void)
100 {
101 return kzalloc(sizeof(struct ebda_rsrc_list), GFP_KERNEL);
102 }
103
104 static struct ebda_pci_rsrc *alloc_ebda_pci_rsrc(void)
105 {
106 return kzalloc(sizeof(struct ebda_pci_rsrc), GFP_KERNEL);
107 }
108
109 static void __init print_bus_info(void)
110 {
111 struct bus_info *ptr;
112
113 list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
114 debug("%s - slot_min = %x\n", __func__, ptr->slot_min);
115 debug("%s - slot_max = %x\n", __func__, ptr->slot_max);
116 debug("%s - slot_count = %x\n", __func__, ptr->slot_count);
117 debug("%s - bus# = %x\n", __func__, ptr->busno);
118 debug("%s - current_speed = %x\n", __func__, ptr->current_speed);
119 debug("%s - controller_id = %x\n", __func__, ptr->controller_id);
120
121 debug("%s - slots_at_33_conv = %x\n", __func__, ptr->slots_at_33_conv);
122 debug("%s - slots_at_66_conv = %x\n", __func__, ptr->slots_at_66_conv);
123 debug("%s - slots_at_66_pcix = %x\n", __func__, ptr->slots_at_66_pcix);
124 debug("%s - slots_at_100_pcix = %x\n", __func__, ptr->slots_at_100_pcix);
125 debug("%s - slots_at_133_pcix = %x\n", __func__, ptr->slots_at_133_pcix);
126
127 }
128 }
129
130 static void print_lo_info(void)
131 {
132 struct rio_detail *ptr;
133 debug("print_lo_info ----\n");
134 list_for_each_entry(ptr, &rio_lo_head, rio_detail_list) {
135 debug("%s - rio_node_id = %x\n", __func__, ptr->rio_node_id);
136 debug("%s - rio_type = %x\n", __func__, ptr->rio_type);
137 debug("%s - owner_id = %x\n", __func__, ptr->owner_id);
138 debug("%s - first_slot_num = %x\n", __func__, ptr->first_slot_num);
139 debug("%s - wpindex = %x\n", __func__, ptr->wpindex);
140 debug("%s - chassis_num = %x\n", __func__, ptr->chassis_num);
141
142 }
143 }
144
145 static void print_vg_info(void)
146 {
147 struct rio_detail *ptr;
148 debug("%s ---\n", __func__);
149 list_for_each_entry(ptr, &rio_vg_head, rio_detail_list) {
150 debug("%s - rio_node_id = %x\n", __func__, ptr->rio_node_id);
151 debug("%s - rio_type = %x\n", __func__, ptr->rio_type);
152 debug("%s - owner_id = %x\n", __func__, ptr->owner_id);
153 debug("%s - first_slot_num = %x\n", __func__, ptr->first_slot_num);
154 debug("%s - wpindex = %x\n", __func__, ptr->wpindex);
155 debug("%s - chassis_num = %x\n", __func__, ptr->chassis_num);
156
157 }
158 }
159
160 static void __init print_ebda_pci_rsrc(void)
161 {
162 struct ebda_pci_rsrc *ptr;
163
164 list_for_each_entry(ptr, &ibmphp_ebda_pci_rsrc_head, ebda_pci_rsrc_list) {
165 debug("%s - rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
166 __func__, ptr->rsrc_type, ptr->bus_num, ptr->dev_fun, ptr->start_addr, ptr->end_addr);
167 }
168 }
169
170 static void __init print_ibm_slot(void)
171 {
172 struct slot *ptr;
173
174 list_for_each_entry(ptr, &ibmphp_slot_head, ibm_slot_list) {
175 debug("%s - slot_number: %x\n", __func__, ptr->number);
176 }
177 }
178
179 static void __init print_opt_vg(void)
180 {
181 struct opt_rio *ptr;
182 debug("%s ---\n", __func__);
183 list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) {
184 debug("%s - rio_type %x\n", __func__, ptr->rio_type);
185 debug("%s - chassis_num: %x\n", __func__, ptr->chassis_num);
186 debug("%s - first_slot_num: %x\n", __func__, ptr->first_slot_num);
187 debug("%s - middle_num: %x\n", __func__, ptr->middle_num);
188 }
189 }
190
191 static void __init print_ebda_hpc(void)
192 {
193 struct controller *hpc_ptr;
194 u16 index;
195
196 list_for_each_entry(hpc_ptr, &ebda_hpc_head, ebda_hpc_list) {
197 for (index = 0; index < hpc_ptr->slot_count; index++) {
198 debug("%s - physical slot#: %x\n", __func__, hpc_ptr->slots[index].slot_num);
199 debug("%s - pci bus# of the slot: %x\n", __func__, hpc_ptr->slots[index].slot_bus_num);
200 debug("%s - index into ctlr addr: %x\n", __func__, hpc_ptr->slots[index].ctl_index);
201 debug("%s - cap of the slot: %x\n", __func__, hpc_ptr->slots[index].slot_cap);
202 }
203
204 for (index = 0; index < hpc_ptr->bus_count; index++)
205 debug("%s - bus# of each bus controlled by this ctlr: %x\n", __func__, hpc_ptr->buses[index].bus_num);
206
207 debug("%s - type of hpc: %x\n", __func__, hpc_ptr->ctlr_type);
208 switch (hpc_ptr->ctlr_type) {
209 case 1:
210 debug("%s - bus: %x\n", __func__, hpc_ptr->u.pci_ctlr.bus);
211 debug("%s - dev_fun: %x\n", __func__, hpc_ptr->u.pci_ctlr.dev_fun);
212 debug("%s - irq: %x\n", __func__, hpc_ptr->irq);
213 break;
214
215 case 0:
216 debug("%s - io_start: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_start);
217 debug("%s - io_end: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_end);
218 debug("%s - irq: %x\n", __func__, hpc_ptr->irq);
219 break;
220
221 case 2:
222 case 4:
223 debug("%s - wpegbbar: %lx\n", __func__, hpc_ptr->u.wpeg_ctlr.wpegbbar);
224 debug("%s - i2c_addr: %x\n", __func__, hpc_ptr->u.wpeg_ctlr.i2c_addr);
225 debug("%s - irq: %x\n", __func__, hpc_ptr->irq);
226 break;
227 }
228 }
229 }
230
231 int __init ibmphp_access_ebda(void)
232 {
233 u8 format, num_ctlrs, rio_complete, hs_complete, ebda_sz;
234 u16 ebda_seg, num_entries, next_offset, offset, blk_id, sub_addr, re, rc_id, re_id, base;
235 int rc = 0;
236
237
238 rio_complete = 0;
239 hs_complete = 0;
240
241 io_mem = ioremap((0x40 << 4) + 0x0e, 2);
242 if (!io_mem)
243 return -ENOMEM;
244 ebda_seg = readw(io_mem);
245 iounmap(io_mem);
246 debug("returned ebda segment: %x\n", ebda_seg);
247
248 io_mem = ioremap(ebda_seg<<4, 1);
249 if (!io_mem)
250 return -ENOMEM;
251 ebda_sz = readb(io_mem);
252 iounmap(io_mem);
253 debug("ebda size: %d(KiB)\n", ebda_sz);
254 if (ebda_sz == 0)
255 return -ENOMEM;
256
257 io_mem = ioremap(ebda_seg<<4, (ebda_sz * 1024));
258 if (!io_mem)
259 return -ENOMEM;
260 next_offset = 0x180;
261
262 for (;;) {
263 offset = next_offset;
264
265 /* Make sure what we read is still in the mapped section */
266 if (WARN(offset > (ebda_sz * 1024 - 4),
267 "ibmphp_ebda: next read is beyond ebda_sz\n"))
268 break;
269
270 next_offset = readw(io_mem + offset); /* offset of next blk */
271
272 offset += 2;
273 if (next_offset == 0) /* 0 indicate it's last blk */
274 break;
275 blk_id = readw(io_mem + offset); /* this blk id */
276
277 offset += 2;
278 /* check if it is hot swap block or rio block */
279 if (blk_id != 0x4853 && blk_id != 0x4752)
280 continue;
281 /* found hs table */
282 if (blk_id == 0x4853) {
283 debug("now enter hot swap block---\n");
284 debug("hot blk id: %x\n", blk_id);
285 format = readb(io_mem + offset);
286
287 offset += 1;
288 if (format != 4)
289 goto error_nodev;
290 debug("hot blk format: %x\n", format);
291 /* hot swap sub blk */
292 base = offset;
293
294 sub_addr = base;
295 re = readw(io_mem + sub_addr); /* next sub blk */
296
297 sub_addr += 2;
298 rc_id = readw(io_mem + sub_addr); /* sub blk id */
299
300 sub_addr += 2;
301 if (rc_id != 0x5243)
302 goto error_nodev;
303 /* rc sub blk signature */
304 num_ctlrs = readb(io_mem + sub_addr);
305
306 sub_addr += 1;
307 hpc_list_ptr = alloc_ebda_hpc_list();
308 if (!hpc_list_ptr) {
309 rc = -ENOMEM;
310 goto out;
311 }
312 hpc_list_ptr->format = format;
313 hpc_list_ptr->num_ctlrs = num_ctlrs;
314 hpc_list_ptr->phys_addr = sub_addr; /* offset of RSRC_CONTROLLER blk */
315 debug("info about hpc descriptor---\n");
316 debug("hot blk format: %x\n", format);
317 debug("num of controller: %x\n", num_ctlrs);
318 debug("offset of hpc data structure entries: %x\n ", sub_addr);
319
320 sub_addr = base + re; /* re sub blk */
321 /* FIXME: rc is never used/checked */
322 rc = readw(io_mem + sub_addr); /* next sub blk */
323
324 sub_addr += 2;
325 re_id = readw(io_mem + sub_addr); /* sub blk id */
326
327 sub_addr += 2;
328 if (re_id != 0x5245)
329 goto error_nodev;
330
331 /* signature of re */
332 num_entries = readw(io_mem + sub_addr);
333
334 sub_addr += 2; /* offset of RSRC_ENTRIES blk */
335 rsrc_list_ptr = alloc_ebda_rsrc_list();
336 if (!rsrc_list_ptr) {
337 rc = -ENOMEM;
338 goto out;
339 }
340 rsrc_list_ptr->format = format;
341 rsrc_list_ptr->num_entries = num_entries;
342 rsrc_list_ptr->phys_addr = sub_addr;
343
344 debug("info about rsrc descriptor---\n");
345 debug("format: %x\n", format);
346 debug("num of rsrc: %x\n", num_entries);
347 debug("offset of rsrc data structure entries: %x\n ", sub_addr);
348
349 hs_complete = 1;
350 } else {
351 /* found rio table, blk_id == 0x4752 */
352 debug("now enter io table ---\n");
353 debug("rio blk id: %x\n", blk_id);
354
355 rio_table_ptr = kzalloc(sizeof(struct rio_table_hdr), GFP_KERNEL);
356 if (!rio_table_ptr) {
357 rc = -ENOMEM;
358 goto out;
359 }
360 rio_table_ptr->ver_num = readb(io_mem + offset);
361 rio_table_ptr->scal_count = readb(io_mem + offset + 1);
362 rio_table_ptr->riodev_count = readb(io_mem + offset + 2);
363 rio_table_ptr->offset = offset + 3 ;
364
365 debug("info about rio table hdr ---\n");
366 debug("ver_num: %x\nscal_count: %x\nriodev_count: %x\noffset of rio table: %x\n ",
367 rio_table_ptr->ver_num, rio_table_ptr->scal_count,
368 rio_table_ptr->riodev_count, rio_table_ptr->offset);
369
370 rio_complete = 1;
371 }
372 }
373
374 if (!hs_complete && !rio_complete)
375 goto error_nodev;
376
377 if (rio_table_ptr) {
378 if (rio_complete && rio_table_ptr->ver_num == 3) {
379 rc = ebda_rio_table();
380 if (rc)
381 goto out;
382 }
383 }
384 rc = ebda_rsrc_controller();
385 if (rc)
386 goto out;
387
388 rc = ebda_rsrc_rsrc();
389 goto out;
390 error_nodev:
391 rc = -ENODEV;
392 out:
393 iounmap(io_mem);
394 return rc;
395 }
396
397 /*
398 * map info of scalability details and rio details from physical address
399 */
400 static int __init ebda_rio_table(void)
401 {
402 u16 offset;
403 u8 i;
404 struct rio_detail *rio_detail_ptr;
405
406 offset = rio_table_ptr->offset;
407 offset += 12 * rio_table_ptr->scal_count;
408
409 // we do concern about rio details
410 for (i = 0; i < rio_table_ptr->riodev_count; i++) {
411 rio_detail_ptr = kzalloc(sizeof(struct rio_detail), GFP_KERNEL);
412 if (!rio_detail_ptr)
413 return -ENOMEM;
414 rio_detail_ptr->rio_node_id = readb(io_mem + offset);
415 rio_detail_ptr->bbar = readl(io_mem + offset + 1);
416 rio_detail_ptr->rio_type = readb(io_mem + offset + 5);
417 rio_detail_ptr->owner_id = readb(io_mem + offset + 6);
418 rio_detail_ptr->port0_node_connect = readb(io_mem + offset + 7);
419 rio_detail_ptr->port0_port_connect = readb(io_mem + offset + 8);
420 rio_detail_ptr->port1_node_connect = readb(io_mem + offset + 9);
421 rio_detail_ptr->port1_port_connect = readb(io_mem + offset + 10);
422 rio_detail_ptr->first_slot_num = readb(io_mem + offset + 11);
423 rio_detail_ptr->status = readb(io_mem + offset + 12);
424 rio_detail_ptr->wpindex = readb(io_mem + offset + 13);
425 rio_detail_ptr->chassis_num = readb(io_mem + offset + 14);
426 // debug("rio_node_id: %x\nbbar: %x\nrio_type: %x\nowner_id: %x\nport0_node: %x\nport0_port: %x\nport1_node: %x\nport1_port: %x\nfirst_slot_num: %x\nstatus: %x\n", rio_detail_ptr->rio_node_id, rio_detail_ptr->bbar, rio_detail_ptr->rio_type, rio_detail_ptr->owner_id, rio_detail_ptr->port0_node_connect, rio_detail_ptr->port0_port_connect, rio_detail_ptr->port1_node_connect, rio_detail_ptr->port1_port_connect, rio_detail_ptr->first_slot_num, rio_detail_ptr->status);
427 //create linked list of chassis
428 if (rio_detail_ptr->rio_type == 4 || rio_detail_ptr->rio_type == 5)
429 list_add(&rio_detail_ptr->rio_detail_list, &rio_vg_head);
430 //create linked list of expansion box
431 else if (rio_detail_ptr->rio_type == 6 || rio_detail_ptr->rio_type == 7)
432 list_add(&rio_detail_ptr->rio_detail_list, &rio_lo_head);
433 else
434 // not in my concern
435 kfree(rio_detail_ptr);
436 offset += 15;
437 }
438 print_lo_info();
439 print_vg_info();
440 return 0;
441 }
442
443 /*
444 * reorganizing linked list of chassis
445 */
446 static struct opt_rio *search_opt_vg(u8 chassis_num)
447 {
448 struct opt_rio *ptr;
449 list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) {
450 if (ptr->chassis_num == chassis_num)
451 return ptr;
452 }
453 return NULL;
454 }
455
456 static int __init combine_wpg_for_chassis(void)
457 {
458 struct opt_rio *opt_rio_ptr = NULL;
459 struct rio_detail *rio_detail_ptr = NULL;
460
461 list_for_each_entry(rio_detail_ptr, &rio_vg_head, rio_detail_list) {
462 opt_rio_ptr = search_opt_vg(rio_detail_ptr->chassis_num);
463 if (!opt_rio_ptr) {
464 opt_rio_ptr = kzalloc(sizeof(struct opt_rio), GFP_KERNEL);
465 if (!opt_rio_ptr)
466 return -ENOMEM;
467 opt_rio_ptr->rio_type = rio_detail_ptr->rio_type;
468 opt_rio_ptr->chassis_num = rio_detail_ptr->chassis_num;
469 opt_rio_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
470 opt_rio_ptr->middle_num = rio_detail_ptr->first_slot_num;
471 list_add(&opt_rio_ptr->opt_rio_list, &opt_vg_head);
472 } else {
473 opt_rio_ptr->first_slot_num = min(opt_rio_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
474 opt_rio_ptr->middle_num = max(opt_rio_ptr->middle_num, rio_detail_ptr->first_slot_num);
475 }
476 }
477 print_opt_vg();
478 return 0;
479 }
480
481 /*
482 * reorganizing linked list of expansion box
483 */
484 static struct opt_rio_lo *search_opt_lo(u8 chassis_num)
485 {
486 struct opt_rio_lo *ptr;
487 list_for_each_entry(ptr, &opt_lo_head, opt_rio_lo_list) {
488 if (ptr->chassis_num == chassis_num)
489 return ptr;
490 }
491 return NULL;
492 }
493
494 static int combine_wpg_for_expansion(void)
495 {
496 struct opt_rio_lo *opt_rio_lo_ptr = NULL;
497 struct rio_detail *rio_detail_ptr = NULL;
498
499 list_for_each_entry(rio_detail_ptr, &rio_lo_head, rio_detail_list) {
500 opt_rio_lo_ptr = search_opt_lo(rio_detail_ptr->chassis_num);
501 if (!opt_rio_lo_ptr) {
502 opt_rio_lo_ptr = kzalloc(sizeof(struct opt_rio_lo), GFP_KERNEL);
503 if (!opt_rio_lo_ptr)
504 return -ENOMEM;
505 opt_rio_lo_ptr->rio_type = rio_detail_ptr->rio_type;
506 opt_rio_lo_ptr->chassis_num = rio_detail_ptr->chassis_num;
507 opt_rio_lo_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
508 opt_rio_lo_ptr->middle_num = rio_detail_ptr->first_slot_num;
509 opt_rio_lo_ptr->pack_count = 1;
510
511 list_add(&opt_rio_lo_ptr->opt_rio_lo_list, &opt_lo_head);
512 } else {
513 opt_rio_lo_ptr->first_slot_num = min(opt_rio_lo_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
514 opt_rio_lo_ptr->middle_num = max(opt_rio_lo_ptr->middle_num, rio_detail_ptr->first_slot_num);
515 opt_rio_lo_ptr->pack_count = 2;
516 }
517 }
518 return 0;
519 }
520
521
522 /* Since we don't know the max slot number per each chassis, hence go
523 * through the list of all chassis to find out the range
524 * Arguments: slot_num, 1st slot number of the chassis we think we are on,
525 * var (0 = chassis, 1 = expansion box)
526 */
527 static int first_slot_num(u8 slot_num, u8 first_slot, u8 var)
528 {
529 struct opt_rio *opt_vg_ptr = NULL;
530 struct opt_rio_lo *opt_lo_ptr = NULL;
531 int rc = 0;
532
533 if (!var) {
534 list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) {
535 if ((first_slot < opt_vg_ptr->first_slot_num) && (slot_num >= opt_vg_ptr->first_slot_num)) {
536 rc = -ENODEV;
537 break;
538 }
539 }
540 } else {
541 list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) {
542 if ((first_slot < opt_lo_ptr->first_slot_num) && (slot_num >= opt_lo_ptr->first_slot_num)) {
543 rc = -ENODEV;
544 break;
545 }
546 }
547 }
548 return rc;
549 }
550
551 static struct opt_rio_lo *find_rxe_num(u8 slot_num)
552 {
553 struct opt_rio_lo *opt_lo_ptr;
554
555 list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) {
556 //check to see if this slot_num belongs to expansion box
557 if ((slot_num >= opt_lo_ptr->first_slot_num) && (!first_slot_num(slot_num, opt_lo_ptr->first_slot_num, 1)))
558 return opt_lo_ptr;
559 }
560 return NULL;
561 }
562
563 static struct opt_rio *find_chassis_num(u8 slot_num)
564 {
565 struct opt_rio *opt_vg_ptr;
566
567 list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) {
568 //check to see if this slot_num belongs to chassis
569 if ((slot_num >= opt_vg_ptr->first_slot_num) && (!first_slot_num(slot_num, opt_vg_ptr->first_slot_num, 0)))
570 return opt_vg_ptr;
571 }
572 return NULL;
573 }
574
575 /* This routine will find out how many slots are in the chassis, so that
576 * the slot numbers for rxe100 would start from 1, and not from 7, or 6 etc
577 */
578 static u8 calculate_first_slot(u8 slot_num)
579 {
580 u8 first_slot = 1;
581 struct slot *slot_cur;
582
583 list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
584 if (slot_cur->ctrl) {
585 if ((slot_cur->ctrl->ctlr_type != 4) && (slot_cur->ctrl->ending_slot_num > first_slot) && (slot_num > slot_cur->ctrl->ending_slot_num))
586 first_slot = slot_cur->ctrl->ending_slot_num;
587 }
588 }
589 return first_slot + 1;
590
591 }
592
593 #define SLOT_NAME_SIZE 30
594
595 static char *create_file_name(struct slot *slot_cur)
596 {
597 struct opt_rio *opt_vg_ptr = NULL;
598 struct opt_rio_lo *opt_lo_ptr = NULL;
599 static char str[SLOT_NAME_SIZE];
600 int which = 0; /* rxe = 1, chassis = 0 */
601 u8 number = 1; /* either chassis or rxe # */
602 u8 first_slot = 1;
603 u8 slot_num;
604 u8 flag = 0;
605
606 if (!slot_cur) {
607 err("Structure passed is empty\n");
608 return NULL;
609 }
610
611 slot_num = slot_cur->number;
612
613 memset(str, 0, sizeof(str));
614
615 if (rio_table_ptr) {
616 if (rio_table_ptr->ver_num == 3) {
617 opt_vg_ptr = find_chassis_num(slot_num);
618 opt_lo_ptr = find_rxe_num(slot_num);
619 }
620 }
621 if (opt_vg_ptr) {
622 if (opt_lo_ptr) {
623 if ((slot_num - opt_vg_ptr->first_slot_num) > (slot_num - opt_lo_ptr->first_slot_num)) {
624 number = opt_lo_ptr->chassis_num;
625 first_slot = opt_lo_ptr->first_slot_num;
626 which = 1; /* it is RXE */
627 } else {
628 first_slot = opt_vg_ptr->first_slot_num;
629 number = opt_vg_ptr->chassis_num;
630 which = 0;
631 }
632 } else {
633 first_slot = opt_vg_ptr->first_slot_num;
634 number = opt_vg_ptr->chassis_num;
635 which = 0;
636 }
637 ++flag;
638 } else if (opt_lo_ptr) {
639 number = opt_lo_ptr->chassis_num;
640 first_slot = opt_lo_ptr->first_slot_num;
641 which = 1;
642 ++flag;
643 } else if (rio_table_ptr) {
644 if (rio_table_ptr->ver_num == 3) {
645 /* if both NULL and we DO have correct RIO table in BIOS */
646 return NULL;
647 }
648 }
649 if (!flag) {
650 if (slot_cur->ctrl->ctlr_type == 4) {
651 first_slot = calculate_first_slot(slot_num);
652 which = 1;
653 } else {
654 which = 0;
655 }
656 }
657
658 sprintf(str, "%s%dslot%d",
659 which == 0 ? "chassis" : "rxe",
660 number, slot_num - first_slot + 1);
661 return str;
662 }
663
664 static int fillslotinfo(struct hotplug_slot *hotplug_slot)
665 {
666 struct slot *slot;
667 int rc = 0;
668
669 slot = to_slot(hotplug_slot);
670 rc = ibmphp_hpc_readslot(slot, READ_ALLSTAT, NULL);
671 return rc;
672 }
673
674 static struct pci_driver ibmphp_driver;
675
676 /*
677 * map info (ctlr-id, slot count, slot#.. bus count, bus#, ctlr type...) of
678 * each hpc from physical address to a list of hot plug controllers based on
679 * hpc descriptors.
680 */
681 static int __init ebda_rsrc_controller(void)
682 {
683 u16 addr, addr_slot, addr_bus;
684 u8 ctlr_id, temp, bus_index;
685 u16 ctlr, slot, bus;
686 u16 slot_num, bus_num, index;
687 struct controller *hpc_ptr;
688 struct ebda_hpc_bus *bus_ptr;
689 struct ebda_hpc_slot *slot_ptr;
690 struct bus_info *bus_info_ptr1, *bus_info_ptr2;
691 int rc;
692 struct slot *tmp_slot;
693 char name[SLOT_NAME_SIZE];
694
695 addr = hpc_list_ptr->phys_addr;
696 for (ctlr = 0; ctlr < hpc_list_ptr->num_ctlrs; ctlr++) {
697 bus_index = 1;
698 ctlr_id = readb(io_mem + addr);
699 addr += 1;
700 slot_num = readb(io_mem + addr);
701
702 addr += 1;
703 addr_slot = addr; /* offset of slot structure */
704 addr += (slot_num * 4);
705
706 bus_num = readb(io_mem + addr);
707
708 addr += 1;
709 addr_bus = addr; /* offset of bus */
710 addr += (bus_num * 9); /* offset of ctlr_type */
711 temp = readb(io_mem + addr);
712
713 addr += 1;
714 /* init hpc structure */
715 hpc_ptr = alloc_ebda_hpc(slot_num, bus_num);
716 if (!hpc_ptr) {
717 rc = -ENOMEM;
718 goto error_no_hpc;
719 }
720 hpc_ptr->ctlr_id = ctlr_id;
721 hpc_ptr->ctlr_relative_id = ctlr;
722 hpc_ptr->slot_count = slot_num;
723 hpc_ptr->bus_count = bus_num;
724 debug("now enter ctlr data structure ---\n");
725 debug("ctlr id: %x\n", ctlr_id);
726 debug("ctlr_relative_id: %x\n", hpc_ptr->ctlr_relative_id);
727 debug("count of slots controlled by this ctlr: %x\n", slot_num);
728 debug("count of buses controlled by this ctlr: %x\n", bus_num);
729
730 /* init slot structure, fetch slot, bus, cap... */
731 slot_ptr = hpc_ptr->slots;
732 for (slot = 0; slot < slot_num; slot++) {
733 slot_ptr->slot_num = readb(io_mem + addr_slot);
734 slot_ptr->slot_bus_num = readb(io_mem + addr_slot + slot_num);
735 slot_ptr->ctl_index = readb(io_mem + addr_slot + 2*slot_num);
736 slot_ptr->slot_cap = readb(io_mem + addr_slot + 3*slot_num);
737
738 // create bus_info lined list --- if only one slot per bus: slot_min = slot_max
739
740 bus_info_ptr2 = ibmphp_find_same_bus_num(slot_ptr->slot_bus_num);
741 if (!bus_info_ptr2) {
742 bus_info_ptr1 = kzalloc(sizeof(struct bus_info), GFP_KERNEL);
743 if (!bus_info_ptr1) {
744 rc = -ENOMEM;
745 goto error_no_slot;
746 }
747 bus_info_ptr1->slot_min = slot_ptr->slot_num;
748 bus_info_ptr1->slot_max = slot_ptr->slot_num;
749 bus_info_ptr1->slot_count += 1;
750 bus_info_ptr1->busno = slot_ptr->slot_bus_num;
751 bus_info_ptr1->index = bus_index++;
752 bus_info_ptr1->current_speed = 0xff;
753 bus_info_ptr1->current_bus_mode = 0xff;
754
755 bus_info_ptr1->controller_id = hpc_ptr->ctlr_id;
756
757 list_add_tail(&bus_info_ptr1->bus_info_list, &bus_info_head);
758
759 } else {
760 bus_info_ptr2->slot_min = min(bus_info_ptr2->slot_min, slot_ptr->slot_num);
761 bus_info_ptr2->slot_max = max(bus_info_ptr2->slot_max, slot_ptr->slot_num);
762 bus_info_ptr2->slot_count += 1;
763
764 }
765
766 // end of creating the bus_info linked list
767
768 slot_ptr++;
769 addr_slot += 1;
770 }
771
772 /* init bus structure */
773 bus_ptr = hpc_ptr->buses;
774 for (bus = 0; bus < bus_num; bus++) {
775 bus_ptr->bus_num = readb(io_mem + addr_bus + bus);
776 bus_ptr->slots_at_33_conv = readb(io_mem + addr_bus + bus_num + 8 * bus);
777 bus_ptr->slots_at_66_conv = readb(io_mem + addr_bus + bus_num + 8 * bus + 1);
778
779 bus_ptr->slots_at_66_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 2);
780
781 bus_ptr->slots_at_100_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 3);
782
783 bus_ptr->slots_at_133_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 4);
784
785 bus_info_ptr2 = ibmphp_find_same_bus_num(bus_ptr->bus_num);
786 if (bus_info_ptr2) {
787 bus_info_ptr2->slots_at_33_conv = bus_ptr->slots_at_33_conv;
788 bus_info_ptr2->slots_at_66_conv = bus_ptr->slots_at_66_conv;
789 bus_info_ptr2->slots_at_66_pcix = bus_ptr->slots_at_66_pcix;
790 bus_info_ptr2->slots_at_100_pcix = bus_ptr->slots_at_100_pcix;
791 bus_info_ptr2->slots_at_133_pcix = bus_ptr->slots_at_133_pcix;
792 }
793 bus_ptr++;
794 }
795
796 hpc_ptr->ctlr_type = temp;
797
798 switch (hpc_ptr->ctlr_type) {
799 case 1:
800 hpc_ptr->u.pci_ctlr.bus = readb(io_mem + addr);
801 hpc_ptr->u.pci_ctlr.dev_fun = readb(io_mem + addr + 1);
802 hpc_ptr->irq = readb(io_mem + addr + 2);
803 addr += 3;
804 debug("ctrl bus = %x, ctlr devfun = %x, irq = %x\n",
805 hpc_ptr->u.pci_ctlr.bus,
806 hpc_ptr->u.pci_ctlr.dev_fun, hpc_ptr->irq);
807 break;
808
809 case 0:
810 hpc_ptr->u.isa_ctlr.io_start = readw(io_mem + addr);
811 hpc_ptr->u.isa_ctlr.io_end = readw(io_mem + addr + 2);
812 if (!request_region(hpc_ptr->u.isa_ctlr.io_start,
813 (hpc_ptr->u.isa_ctlr.io_end - hpc_ptr->u.isa_ctlr.io_start + 1),
814 "ibmphp")) {
815 rc = -ENODEV;
816 goto error_no_slot;
817 }
818 hpc_ptr->irq = readb(io_mem + addr + 4);
819 addr += 5;
820 break;
821
822 case 2:
823 case 4:
824 hpc_ptr->u.wpeg_ctlr.wpegbbar = readl(io_mem + addr);
825 hpc_ptr->u.wpeg_ctlr.i2c_addr = readb(io_mem + addr + 4);
826 hpc_ptr->irq = readb(io_mem + addr + 5);
827 addr += 6;
828 break;
829 default:
830 rc = -ENODEV;
831 goto error_no_slot;
832 }
833
834 //reorganize chassis' linked list
835 combine_wpg_for_chassis();
836 combine_wpg_for_expansion();
837 hpc_ptr->revision = 0xff;
838 hpc_ptr->options = 0xff;
839 hpc_ptr->starting_slot_num = hpc_ptr->slots[0].slot_num;
840 hpc_ptr->ending_slot_num = hpc_ptr->slots[slot_num-1].slot_num;
841
842 // register slots with hpc core as well as create linked list of ibm slot
843 for (index = 0; index < hpc_ptr->slot_count; index++) {
844 tmp_slot = kzalloc(sizeof(*tmp_slot), GFP_KERNEL);
845 if (!tmp_slot) {
846 rc = -ENOMEM;
847 goto error_no_slot;
848 }
849
850 tmp_slot->flag = 1;
851
852 tmp_slot->capabilities = hpc_ptr->slots[index].slot_cap;
853 if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_133_MAX) == EBDA_SLOT_133_MAX)
854 tmp_slot->supported_speed = 3;
855 else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_100_MAX) == EBDA_SLOT_100_MAX)
856 tmp_slot->supported_speed = 2;
857 else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_66_MAX) == EBDA_SLOT_66_MAX)
858 tmp_slot->supported_speed = 1;
859
860 if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_PCIX_CAP) == EBDA_SLOT_PCIX_CAP)
861 tmp_slot->supported_bus_mode = 1;
862 else
863 tmp_slot->supported_bus_mode = 0;
864
865
866 tmp_slot->bus = hpc_ptr->slots[index].slot_bus_num;
867
868 bus_info_ptr1 = ibmphp_find_same_bus_num(hpc_ptr->slots[index].slot_bus_num);
869 if (!bus_info_ptr1) {
870 rc = -ENODEV;
871 goto error;
872 }
873 tmp_slot->bus_on = bus_info_ptr1;
874 bus_info_ptr1 = NULL;
875 tmp_slot->ctrl = hpc_ptr;
876
877 tmp_slot->ctlr_index = hpc_ptr->slots[index].ctl_index;
878 tmp_slot->number = hpc_ptr->slots[index].slot_num;
879
880 rc = fillslotinfo(&tmp_slot->hotplug_slot);
881 if (rc)
882 goto error;
883
884 rc = ibmphp_init_devno(&tmp_slot);
885 if (rc)
886 goto error;
887 tmp_slot->hotplug_slot.ops = &ibmphp_hotplug_slot_ops;
888
889 // end of registering ibm slot with hotplug core
890
891 list_add(&tmp_slot->ibm_slot_list, &ibmphp_slot_head);
892 }
893
894 print_bus_info();
895 list_add(&hpc_ptr->ebda_hpc_list, &ebda_hpc_head);
896
897 } /* each hpc */
898
899 list_for_each_entry(tmp_slot, &ibmphp_slot_head, ibm_slot_list) {
900 snprintf(name, SLOT_NAME_SIZE, "%s", create_file_name(tmp_slot));
901 pci_hp_register(&tmp_slot->hotplug_slot,
902 pci_find_bus(0, tmp_slot->bus), tmp_slot->device, name);
903 }
904
905 print_ebda_hpc();
906 print_ibm_slot();
907 return 0;
908
909 error:
910 kfree(tmp_slot);
911 error_no_slot:
912 free_ebda_hpc(hpc_ptr);
913 error_no_hpc:
914 iounmap(io_mem);
915 return rc;
916 }
917
918 /*
919 * map info (bus, devfun, start addr, end addr..) of i/o, memory,
920 * pfm from the physical addr to a list of resource.
921 */
922 static int __init ebda_rsrc_rsrc(void)
923 {
924 u16 addr;
925 short rsrc;
926 u8 type, rsrc_type;
927 struct ebda_pci_rsrc *rsrc_ptr;
928
929 addr = rsrc_list_ptr->phys_addr;
930 debug("now entering rsrc land\n");
931 debug("offset of rsrc: %x\n", rsrc_list_ptr->phys_addr);
932
933 for (rsrc = 0; rsrc < rsrc_list_ptr->num_entries; rsrc++) {
934 type = readb(io_mem + addr);
935
936 addr += 1;
937 rsrc_type = type & EBDA_RSRC_TYPE_MASK;
938
939 if (rsrc_type == EBDA_IO_RSRC_TYPE) {
940 rsrc_ptr = alloc_ebda_pci_rsrc();
941 if (!rsrc_ptr) {
942 iounmap(io_mem);
943 return -ENOMEM;
944 }
945 rsrc_ptr->rsrc_type = type;
946
947 rsrc_ptr->bus_num = readb(io_mem + addr);
948 rsrc_ptr->dev_fun = readb(io_mem + addr + 1);
949 rsrc_ptr->start_addr = readw(io_mem + addr + 2);
950 rsrc_ptr->end_addr = readw(io_mem + addr + 4);
951 addr += 6;
952
953 debug("rsrc from io type ----\n");
954 debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
955 rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
956
957 list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
958 }
959
960 if (rsrc_type == EBDA_MEM_RSRC_TYPE || rsrc_type == EBDA_PFM_RSRC_TYPE) {
961 rsrc_ptr = alloc_ebda_pci_rsrc();
962 if (!rsrc_ptr) {
963 iounmap(io_mem);
964 return -ENOMEM;
965 }
966 rsrc_ptr->rsrc_type = type;
967
968 rsrc_ptr->bus_num = readb(io_mem + addr);
969 rsrc_ptr->dev_fun = readb(io_mem + addr + 1);
970 rsrc_ptr->start_addr = readl(io_mem + addr + 2);
971 rsrc_ptr->end_addr = readl(io_mem + addr + 6);
972 addr += 10;
973
974 debug("rsrc from mem or pfm ---\n");
975 debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
976 rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
977
978 list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
979 }
980 }
981 kfree(rsrc_list_ptr);
982 rsrc_list_ptr = NULL;
983 print_ebda_pci_rsrc();
984 return 0;
985 }
986
987 u16 ibmphp_get_total_controllers(void)
988 {
989 return hpc_list_ptr->num_ctlrs;
990 }
991
992 struct slot *ibmphp_get_slot_from_physical_num(u8 physical_num)
993 {
994 struct slot *slot;
995
996 list_for_each_entry(slot, &ibmphp_slot_head, ibm_slot_list) {
997 if (slot->number == physical_num)
998 return slot;
999 }
1000 return NULL;
1001 }
1002
1003 /* To find:
1004 * - the smallest slot number
1005 * - the largest slot number
1006 * - the total number of the slots based on each bus
1007 * (if only one slot per bus slot_min = slot_max )
1008 */
1009 struct bus_info *ibmphp_find_same_bus_num(u32 num)
1010 {
1011 struct bus_info *ptr;
1012
1013 list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
1014 if (ptr->busno == num)
1015 return ptr;
1016 }
1017 return NULL;
1018 }
1019
1020 /* Finding relative bus number, in order to map corresponding
1021 * bus register
1022 */
1023 int ibmphp_get_bus_index(u8 num)
1024 {
1025 struct bus_info *ptr;
1026
1027 list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
1028 if (ptr->busno == num)
1029 return ptr->index;
1030 }
1031 return -ENODEV;
1032 }
1033
1034 void ibmphp_free_bus_info_queue(void)
1035 {
1036 struct bus_info *bus_info, *next;
1037
1038 list_for_each_entry_safe(bus_info, next, &bus_info_head,
1039 bus_info_list) {
1040 kfree (bus_info);
1041 }
1042 }
1043
1044 void ibmphp_free_ebda_hpc_queue(void)
1045 {
1046 struct controller *controller = NULL, *next;
1047 int pci_flag = 0;
1048
1049 list_for_each_entry_safe(controller, next, &ebda_hpc_head,
1050 ebda_hpc_list) {
1051 if (controller->ctlr_type == 0)
1052 release_region(controller->u.isa_ctlr.io_start, (controller->u.isa_ctlr.io_end - controller->u.isa_ctlr.io_start + 1));
1053 else if ((controller->ctlr_type == 1) && (!pci_flag)) {
1054 ++pci_flag;
1055 pci_unregister_driver(&ibmphp_driver);
1056 }
1057 free_ebda_hpc(controller);
1058 }
1059 }
1060
1061 void ibmphp_free_ebda_pci_rsrc_queue(void)
1062 {
1063 struct ebda_pci_rsrc *resource, *next;
1064
1065 list_for_each_entry_safe(resource, next, &ibmphp_ebda_pci_rsrc_head,
1066 ebda_pci_rsrc_list) {
1067 kfree (resource);
1068 resource = NULL;
1069 }
1070 }
1071
1072 static const struct pci_device_id id_table[] = {
1073 {
1074 .vendor = PCI_VENDOR_ID_IBM,
1075 .device = HPC_DEVICE_ID,
1076 .subvendor = PCI_VENDOR_ID_IBM,
1077 .subdevice = HPC_SUBSYSTEM_ID,
1078 .class = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
1079 }, {}
1080 };
1081
1082 MODULE_DEVICE_TABLE(pci, id_table);
1083
1084 static int ibmphp_probe(struct pci_dev *, const struct pci_device_id *);
1085 static struct pci_driver ibmphp_driver = {
1086 .name = "ibmphp",
1087 .id_table = id_table,
1088 .probe = ibmphp_probe,
1089 };
1090
1091 int ibmphp_register_pci(void)
1092 {
1093 struct controller *ctrl;
1094 int rc = 0;
1095
1096 list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
1097 if (ctrl->ctlr_type == 1) {
1098 rc = pci_register_driver(&ibmphp_driver);
1099 break;
1100 }
1101 }
1102 return rc;
1103 }
1104 static int ibmphp_probe(struct pci_dev *dev, const struct pci_device_id *ids)
1105 {
1106 struct controller *ctrl;
1107
1108 debug("inside ibmphp_probe\n");
1109
1110 list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
1111 if (ctrl->ctlr_type == 1) {
1112 if ((dev->devfn == ctrl->u.pci_ctlr.dev_fun) && (dev->bus->number == ctrl->u.pci_ctlr.bus)) {
1113 ctrl->ctrl_dev = dev;
1114 debug("found device!!!\n");
1115 debug("dev->device = %x, dev->subsystem_device = %x\n", dev->device, dev->subsystem_device);
1116 return 0;
1117 }
1118 }
1119 }
1120 return -ENODEV;
1121 }
Linux with added FPC-III support