1 // SPDX-License-Identifier: GPL-2.0+
3 * IBM Hot Plug Controller Driver
5 * Written By: Tong Yu, IBM Corporation
8 * Copyright (C) 2001-2003 IBM Corp.
10 * All rights reserved.
16 #include <linux/module.h>
17 #include <linux/errno.h>
19 #include <linux/slab.h>
20 #include <linux/pci.h>
21 #include <linux/list.h>
22 #include <linux/init.h>
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.
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...)
38 LIST_HEAD(ibmphp_ebda_pci_rsrc_head);
39 LIST_HEAD(ibmphp_slot_head);
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;
54 static int ebda_rsrc_controller(void);
55 static int ebda_rsrc_rsrc(void);
56 static int ebda_rio_table(void);
58 static struct ebda_hpc_list * __init alloc_ebda_hpc_list(void)
60 return kzalloc(sizeof(struct ebda_hpc_list), GFP_KERNEL);
63 static struct controller *alloc_ebda_hpc(u32 slot_count, u32 bus_count)
65 struct controller *controller;
66 struct ebda_hpc_slot *slots;
67 struct ebda_hpc_bus *buses;
69 controller = kzalloc(sizeof(struct controller), GFP_KERNEL);
73 slots = kcalloc(slot_count, sizeof(struct ebda_hpc_slot), GFP_KERNEL);
76 controller->slots = slots;
78 buses = kcalloc(bus_count, sizeof(struct ebda_hpc_bus), GFP_KERNEL);
81 controller->buses = buses;
85 kfree(controller->slots);
92 static void free_ebda_hpc(struct controller *controller)
94 kfree(controller->slots);
95 kfree(controller->buses);
99 static struct ebda_rsrc_list * __init alloc_ebda_rsrc_list(void)
101 return kzalloc(sizeof(struct ebda_rsrc_list), GFP_KERNEL);
104 static struct ebda_pci_rsrc *alloc_ebda_pci_rsrc(void)
106 return kzalloc(sizeof(struct ebda_pci_rsrc), GFP_KERNEL);
109 static void __init print_bus_info(void)
111 struct bus_info *ptr;
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);
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);
130 static void print_lo_info(void)
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);
145 static void print_vg_info(void)
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);
160 static void __init print_ebda_pci_rsrc(void)
162 struct ebda_pci_rsrc *ptr;
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);
170 static void __init print_ibm_slot(void)
174 list_for_each_entry(ptr, &ibmphp_slot_head, ibm_slot_list) {
175 debug("%s - slot_number: %x\n", __func__, ptr->number);
179 static void __init print_opt_vg(void)
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);
191 static void __init print_ebda_hpc(void)
193 struct controller *hpc_ptr;
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);
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);
207 debug("%s - type of hpc: %x\n", __func__, hpc_ptr->ctlr_type);
208 switch (hpc_ptr->ctlr_type) {
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);
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);
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);
231 int __init ibmphp_access_ebda(void)
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;
241 io_mem = ioremap((0x40 << 4) + 0x0e, 2);
244 ebda_seg = readw(io_mem);
246 debug("returned ebda segment: %x\n", ebda_seg);
248 io_mem = ioremap(ebda_seg<<4, 1);
251 ebda_sz = readb(io_mem);
253 debug("ebda size: %d(KiB)\n", ebda_sz);
257 io_mem = ioremap(ebda_seg<<4, (ebda_sz * 1024));
263 offset = next_offset;
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"))
270 next_offset = readw(io_mem + offset); /* offset of next blk */
273 if (next_offset == 0) /* 0 indicate it's last blk */
275 blk_id = readw(io_mem + offset); /* this blk id */
278 /* check if it is hot swap block or rio block */
279 if (blk_id != 0x4853 && blk_id != 0x4752)
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);
290 debug("hot blk format: %x\n", format);
291 /* hot swap sub blk */
295 re = readw(io_mem + sub_addr); /* next sub blk */
298 rc_id = readw(io_mem + sub_addr); /* sub blk id */
303 /* rc sub blk signature */
304 num_ctlrs = readb(io_mem + sub_addr);
307 hpc_list_ptr = alloc_ebda_hpc_list();
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);
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 */
325 re_id = readw(io_mem + sub_addr); /* sub blk id */
331 /* signature of re */
332 num_entries = readw(io_mem + sub_addr);
334 sub_addr += 2; /* offset of RSRC_ENTRIES blk */
335 rsrc_list_ptr = alloc_ebda_rsrc_list();
336 if (!rsrc_list_ptr) {
340 rsrc_list_ptr->format = format;
341 rsrc_list_ptr->num_entries = num_entries;
342 rsrc_list_ptr->phys_addr = sub_addr;
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);
351 /* found rio table, blk_id == 0x4752 */
352 debug("now enter io table ---\n");
353 debug("rio blk id: %x\n", blk_id);
355 rio_table_ptr = kzalloc(sizeof(struct rio_table_hdr), GFP_KERNEL);
356 if (!rio_table_ptr) {
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 ;
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);
374 if (!hs_complete && !rio_complete)
378 if (rio_complete && rio_table_ptr->ver_num == 3) {
379 rc = ebda_rio_table();
384 rc = ebda_rsrc_controller();
388 rc = ebda_rsrc_rsrc();
398 * map info of scalability details and rio details from physical address
400 static int __init ebda_rio_table(void)
404 struct rio_detail *rio_detail_ptr;
406 offset = rio_table_ptr->offset;
407 offset += 12 * rio_table_ptr->scal_count;
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);
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);
435 kfree(rio_detail_ptr);
444 * reorganizing linked list of chassis
446 static struct opt_rio *search_opt_vg(u8 chassis_num)
449 list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) {
450 if (ptr->chassis_num == chassis_num)
456 static int __init combine_wpg_for_chassis(void)
458 struct opt_rio *opt_rio_ptr = NULL;
459 struct rio_detail *rio_detail_ptr = NULL;
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);
464 opt_rio_ptr = kzalloc(sizeof(struct opt_rio), GFP_KERNEL);
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);
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);
482 * reorganizing linked list of expansion box
484 static struct opt_rio_lo *search_opt_lo(u8 chassis_num)
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)
494 static int combine_wpg_for_expansion(void)
496 struct opt_rio_lo *opt_rio_lo_ptr = NULL;
497 struct rio_detail *rio_detail_ptr = NULL;
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);
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;
511 list_add(&opt_rio_lo_ptr->opt_rio_lo_list, &opt_lo_head);
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;
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)
527 static int first_slot_num(u8 slot_num, u8 first_slot, u8 var)
529 struct opt_rio *opt_vg_ptr = NULL;
530 struct opt_rio_lo *opt_lo_ptr = NULL;
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)) {
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)) {
551 static struct opt_rio_lo *find_rxe_num(u8 slot_num)
553 struct opt_rio_lo *opt_lo_ptr;
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)))
563 static struct opt_rio *find_chassis_num(u8 slot_num)
565 struct opt_rio *opt_vg_ptr;
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)))
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
578 static u8 calculate_first_slot(u8 slot_num)
581 struct slot *slot_cur;
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;
589 return first_slot + 1;
593 #define SLOT_NAME_SIZE 30
595 static char *create_file_name(struct slot *slot_cur)
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 # */
607 err("Structure passed is empty\n");
611 slot_num = slot_cur->number;
613 memset(str, 0, sizeof(str));
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);
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 */
628 first_slot = opt_vg_ptr->first_slot_num;
629 number = opt_vg_ptr->chassis_num;
633 first_slot = opt_vg_ptr->first_slot_num;
634 number = opt_vg_ptr->chassis_num;
638 } else if (opt_lo_ptr) {
639 number = opt_lo_ptr->chassis_num;
640 first_slot = opt_lo_ptr->first_slot_num;
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 */
650 if (slot_cur->ctrl->ctlr_type == 4) {
651 first_slot = calculate_first_slot(slot_num);
658 sprintf(str, "%s%dslot%d",
659 which == 0 ? "chassis" : "rxe",
660 number, slot_num - first_slot + 1);
664 static int fillslotinfo(struct hotplug_slot *hotplug_slot)
669 slot = to_slot(hotplug_slot);
670 rc = ibmphp_hpc_readslot(slot, READ_ALLSTAT, NULL);
674 static struct pci_driver ibmphp_driver;
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
681 static int __init ebda_rsrc_controller(void)
683 u16 addr, addr_slot, addr_bus;
684 u8 ctlr_id, temp, bus_index;
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;
692 struct slot *tmp_slot;
693 char name[SLOT_NAME_SIZE];
695 addr = hpc_list_ptr->phys_addr;
696 for (ctlr = 0; ctlr < hpc_list_ptr->num_ctlrs; ctlr++) {
698 ctlr_id = readb(io_mem + addr);
700 slot_num = readb(io_mem + addr);
703 addr_slot = addr; /* offset of slot structure */
704 addr += (slot_num * 4);
706 bus_num = readb(io_mem + addr);
709 addr_bus = addr; /* offset of bus */
710 addr += (bus_num * 9); /* offset of ctlr_type */
711 temp = readb(io_mem + addr);
714 /* init hpc structure */
715 hpc_ptr = alloc_ebda_hpc(slot_num, bus_num);
719 hpc_ptr->ctlr_id = ctlr_id;
720 hpc_ptr->ctlr_relative_id = ctlr;
721 hpc_ptr->slot_count = slot_num;
722 hpc_ptr->bus_count = bus_num;
723 debug("now enter ctlr data structure ---\n");
724 debug("ctlr id: %x\n", ctlr_id);
725 debug("ctlr_relative_id: %x\n", hpc_ptr->ctlr_relative_id);
726 debug("count of slots controlled by this ctlr: %x\n", slot_num);
727 debug("count of buses controlled by this ctlr: %x\n", bus_num);
729 /* init slot structure, fetch slot, bus, cap... */
730 slot_ptr = hpc_ptr->slots;
731 for (slot = 0; slot < slot_num; slot++) {
732 slot_ptr->slot_num = readb(io_mem + addr_slot);
733 slot_ptr->slot_bus_num = readb(io_mem + addr_slot + slot_num);
734 slot_ptr->ctl_index = readb(io_mem + addr_slot + 2*slot_num);
735 slot_ptr->slot_cap = readb(io_mem + addr_slot + 3*slot_num);
737 // create bus_info lined list --- if only one slot per bus: slot_min = slot_max
739 bus_info_ptr2 = ibmphp_find_same_bus_num(slot_ptr->slot_bus_num);
740 if (!bus_info_ptr2) {
741 bus_info_ptr1 = kzalloc(sizeof(struct bus_info), GFP_KERNEL);
742 if (!bus_info_ptr1) {
746 bus_info_ptr1->slot_min = slot_ptr->slot_num;
747 bus_info_ptr1->slot_max = slot_ptr->slot_num;
748 bus_info_ptr1->slot_count += 1;
749 bus_info_ptr1->busno = slot_ptr->slot_bus_num;
750 bus_info_ptr1->index = bus_index++;
751 bus_info_ptr1->current_speed = 0xff;
752 bus_info_ptr1->current_bus_mode = 0xff;
754 bus_info_ptr1->controller_id = hpc_ptr->ctlr_id;
756 list_add_tail(&bus_info_ptr1->bus_info_list, &bus_info_head);
759 bus_info_ptr2->slot_min = min(bus_info_ptr2->slot_min, slot_ptr->slot_num);
760 bus_info_ptr2->slot_max = max(bus_info_ptr2->slot_max, slot_ptr->slot_num);
761 bus_info_ptr2->slot_count += 1;
765 // end of creating the bus_info linked list
771 /* init bus structure */
772 bus_ptr = hpc_ptr->buses;
773 for (bus = 0; bus < bus_num; bus++) {
774 bus_ptr->bus_num = readb(io_mem + addr_bus + bus);
775 bus_ptr->slots_at_33_conv = readb(io_mem + addr_bus + bus_num + 8 * bus);
776 bus_ptr->slots_at_66_conv = readb(io_mem + addr_bus + bus_num + 8 * bus + 1);
778 bus_ptr->slots_at_66_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 2);
780 bus_ptr->slots_at_100_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 3);
782 bus_ptr->slots_at_133_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 4);
784 bus_info_ptr2 = ibmphp_find_same_bus_num(bus_ptr->bus_num);
786 bus_info_ptr2->slots_at_33_conv = bus_ptr->slots_at_33_conv;
787 bus_info_ptr2->slots_at_66_conv = bus_ptr->slots_at_66_conv;
788 bus_info_ptr2->slots_at_66_pcix = bus_ptr->slots_at_66_pcix;
789 bus_info_ptr2->slots_at_100_pcix = bus_ptr->slots_at_100_pcix;
790 bus_info_ptr2->slots_at_133_pcix = bus_ptr->slots_at_133_pcix;
795 hpc_ptr->ctlr_type = temp;
797 switch (hpc_ptr->ctlr_type) {
799 hpc_ptr->u.pci_ctlr.bus = readb(io_mem + addr);
800 hpc_ptr->u.pci_ctlr.dev_fun = readb(io_mem + addr + 1);
801 hpc_ptr->irq = readb(io_mem + addr + 2);
803 debug("ctrl bus = %x, ctlr devfun = %x, irq = %x\n",
804 hpc_ptr->u.pci_ctlr.bus,
805 hpc_ptr->u.pci_ctlr.dev_fun, hpc_ptr->irq);
809 hpc_ptr->u.isa_ctlr.io_start = readw(io_mem + addr);
810 hpc_ptr->u.isa_ctlr.io_end = readw(io_mem + addr + 2);
811 if (!request_region(hpc_ptr->u.isa_ctlr.io_start,
812 (hpc_ptr->u.isa_ctlr.io_end - hpc_ptr->u.isa_ctlr.io_start + 1),
817 hpc_ptr->irq = readb(io_mem + addr + 4);
823 hpc_ptr->u.wpeg_ctlr.wpegbbar = readl(io_mem + addr);
824 hpc_ptr->u.wpeg_ctlr.i2c_addr = readb(io_mem + addr + 4);
825 hpc_ptr->irq = readb(io_mem + addr + 5);
833 //reorganize chassis' linked list
834 combine_wpg_for_chassis();
835 combine_wpg_for_expansion();
836 hpc_ptr->revision = 0xff;
837 hpc_ptr->options = 0xff;
838 hpc_ptr->starting_slot_num = hpc_ptr->slots[0].slot_num;
839 hpc_ptr->ending_slot_num = hpc_ptr->slots[slot_num-1].slot_num;
841 // register slots with hpc core as well as create linked list of ibm slot
842 for (index = 0; index < hpc_ptr->slot_count; index++) {
843 tmp_slot = kzalloc(sizeof(*tmp_slot), GFP_KERNEL);
851 tmp_slot->capabilities = hpc_ptr->slots[index].slot_cap;
852 if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_133_MAX) == EBDA_SLOT_133_MAX)
853 tmp_slot->supported_speed = 3;
854 else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_100_MAX) == EBDA_SLOT_100_MAX)
855 tmp_slot->supported_speed = 2;
856 else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_66_MAX) == EBDA_SLOT_66_MAX)
857 tmp_slot->supported_speed = 1;
859 if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_PCIX_CAP) == EBDA_SLOT_PCIX_CAP)
860 tmp_slot->supported_bus_mode = 1;
862 tmp_slot->supported_bus_mode = 0;
865 tmp_slot->bus = hpc_ptr->slots[index].slot_bus_num;
867 bus_info_ptr1 = ibmphp_find_same_bus_num(hpc_ptr->slots[index].slot_bus_num);
868 if (!bus_info_ptr1) {
872 tmp_slot->bus_on = bus_info_ptr1;
873 bus_info_ptr1 = NULL;
874 tmp_slot->ctrl = hpc_ptr;
876 tmp_slot->ctlr_index = hpc_ptr->slots[index].ctl_index;
877 tmp_slot->number = hpc_ptr->slots[index].slot_num;
879 rc = fillslotinfo(&tmp_slot->hotplug_slot);
883 rc = ibmphp_init_devno(&tmp_slot);
886 tmp_slot->hotplug_slot.ops = &ibmphp_hotplug_slot_ops;
888 // end of registering ibm slot with hotplug core
890 list_add(&tmp_slot->ibm_slot_list, &ibmphp_slot_head);
894 list_add(&hpc_ptr->ebda_hpc_list, &ebda_hpc_head);
898 list_for_each_entry(tmp_slot, &ibmphp_slot_head, ibm_slot_list) {
899 snprintf(name, SLOT_NAME_SIZE, "%s", create_file_name(tmp_slot));
900 pci_hp_register(&tmp_slot->hotplug_slot,
901 pci_find_bus(0, tmp_slot->bus), tmp_slot->device, name);
911 free_ebda_hpc(hpc_ptr);
916 * map info (bus, devfun, start addr, end addr..) of i/o, memory,
917 * pfm from the physical addr to a list of resource.
919 static int __init ebda_rsrc_rsrc(void)
924 struct ebda_pci_rsrc *rsrc_ptr;
926 addr = rsrc_list_ptr->phys_addr;
927 debug("now entering rsrc land\n");
928 debug("offset of rsrc: %x\n", rsrc_list_ptr->phys_addr);
930 for (rsrc = 0; rsrc < rsrc_list_ptr->num_entries; rsrc++) {
931 type = readb(io_mem + addr);
934 rsrc_type = type & EBDA_RSRC_TYPE_MASK;
936 if (rsrc_type == EBDA_IO_RSRC_TYPE) {
937 rsrc_ptr = alloc_ebda_pci_rsrc();
942 rsrc_ptr->rsrc_type = type;
944 rsrc_ptr->bus_num = readb(io_mem + addr);
945 rsrc_ptr->dev_fun = readb(io_mem + addr + 1);
946 rsrc_ptr->start_addr = readw(io_mem + addr + 2);
947 rsrc_ptr->end_addr = readw(io_mem + addr + 4);
950 debug("rsrc from io type ----\n");
951 debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
952 rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
954 list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
957 if (rsrc_type == EBDA_MEM_RSRC_TYPE || rsrc_type == EBDA_PFM_RSRC_TYPE) {
958 rsrc_ptr = alloc_ebda_pci_rsrc();
963 rsrc_ptr->rsrc_type = type;
965 rsrc_ptr->bus_num = readb(io_mem + addr);
966 rsrc_ptr->dev_fun = readb(io_mem + addr + 1);
967 rsrc_ptr->start_addr = readl(io_mem + addr + 2);
968 rsrc_ptr->end_addr = readl(io_mem + addr + 6);
971 debug("rsrc from mem or pfm ---\n");
972 debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
973 rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
975 list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
978 kfree(rsrc_list_ptr);
979 rsrc_list_ptr = NULL;
980 print_ebda_pci_rsrc();
984 u16 ibmphp_get_total_controllers(void)
986 return hpc_list_ptr->num_ctlrs;
989 struct slot *ibmphp_get_slot_from_physical_num(u8 physical_num)
993 list_for_each_entry(slot, &ibmphp_slot_head, ibm_slot_list) {
994 if (slot->number == physical_num)
1001 * - the smallest slot number
1002 * - the largest slot number
1003 * - the total number of the slots based on each bus
1004 * (if only one slot per bus slot_min = slot_max )
1006 struct bus_info *ibmphp_find_same_bus_num(u32 num)
1008 struct bus_info *ptr;
1010 list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
1011 if (ptr->busno == num)
1017 /* Finding relative bus number, in order to map corresponding
1020 int ibmphp_get_bus_index(u8 num)
1022 struct bus_info *ptr;
1024 list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
1025 if (ptr->busno == num)
1031 void ibmphp_free_bus_info_queue(void)
1033 struct bus_info *bus_info, *next;
1035 list_for_each_entry_safe(bus_info, next, &bus_info_head,
1041 void ibmphp_free_ebda_hpc_queue(void)
1043 struct controller *controller = NULL, *next;
1046 list_for_each_entry_safe(controller, next, &ebda_hpc_head,
1048 if (controller->ctlr_type == 0)
1049 release_region(controller->u.isa_ctlr.io_start, (controller->u.isa_ctlr.io_end - controller->u.isa_ctlr.io_start + 1));
1050 else if ((controller->ctlr_type == 1) && (!pci_flag)) {
1052 pci_unregister_driver(&ibmphp_driver);
1054 free_ebda_hpc(controller);
1058 void ibmphp_free_ebda_pci_rsrc_queue(void)
1060 struct ebda_pci_rsrc *resource, *next;
1062 list_for_each_entry_safe(resource, next, &ibmphp_ebda_pci_rsrc_head,
1063 ebda_pci_rsrc_list) {
1069 static const struct pci_device_id id_table[] = {
1071 .vendor = PCI_VENDOR_ID_IBM,
1072 .device = HPC_DEVICE_ID,
1073 .subvendor = PCI_VENDOR_ID_IBM,
1074 .subdevice = HPC_SUBSYSTEM_ID,
1075 .class = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
1079 MODULE_DEVICE_TABLE(pci, id_table);
1081 static int ibmphp_probe(struct pci_dev *, const struct pci_device_id *);
1082 static struct pci_driver ibmphp_driver = {
1084 .id_table = id_table,
1085 .probe = ibmphp_probe,
1088 int ibmphp_register_pci(void)
1090 struct controller *ctrl;
1093 list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
1094 if (ctrl->ctlr_type == 1) {
1095 rc = pci_register_driver(&ibmphp_driver);
1101 static int ibmphp_probe(struct pci_dev *dev, const struct pci_device_id *ids)
1103 struct controller *ctrl;
1105 debug("inside ibmphp_probe\n");
1107 list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
1108 if (ctrl->ctlr_type == 1) {
1109 if ((dev->devfn == ctrl->u.pci_ctlr.dev_fun) && (dev->bus->number == ctrl->u.pci_ctlr.bus)) {
1110 ctrl->ctrl_dev = dev;
1111 debug("found device!!!\n");
1112 debug("dev->device = %x, dev->subsystem_device = %x\n", dev->device, dev->subsystem_device);