Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * IBM Hot Plug Controller Driver |
| 3 | * |
| 4 | * Written By: Irene Zubarev, IBM Corporation |
| 5 | * |
| 6 | * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) |
| 7 | * Copyright (C) 2001,2002 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/module.h> |
| 31 | #include <linux/slab.h> |
| 32 | #include <linux/pci.h> |
| 33 | #include <linux/list.h> |
| 34 | #include <linux/init.h> |
| 35 | #include "ibmphp.h" |
| 36 | |
| 37 | static int flags = 0; /* for testing */ |
| 38 | |
| 39 | static void update_resources (struct bus_node *bus_cur, int type, int rangeno); |
| 40 | static int once_over (void); |
| 41 | static int remove_ranges (struct bus_node *, struct bus_node *); |
| 42 | static int update_bridge_ranges (struct bus_node **); |
H. Peter Anvin | c85e4aa | 2010-02-10 17:45:09 -0800 | [diff] [blame] | 43 | static int add_bus_range (int type, struct range_node *, struct bus_node *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | static void fix_resources (struct bus_node *); |
| 45 | static struct bus_node *find_bus_wprev (u8, struct bus_node **, u8); |
| 46 | |
| 47 | static LIST_HEAD(gbuses); |
| 48 | |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 49 | static struct bus_node * __init alloc_error_bus (struct ebda_pci_rsrc *curr, u8 busno, int flag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | { |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 51 | struct bus_node *newbus; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
| 53 | if (!(curr) && !(flag)) { |
| 54 | err ("NULL pointer passed\n"); |
| 55 | return NULL; |
| 56 | } |
| 57 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 58 | newbus = kzalloc(sizeof(struct bus_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | if (!newbus) { |
| 60 | err ("out of system memory\n"); |
| 61 | return NULL; |
| 62 | } |
| 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | if (flag) |
| 65 | newbus->busno = busno; |
| 66 | else |
| 67 | newbus->busno = curr->bus_num; |
| 68 | list_add_tail (&newbus->bus_list, &gbuses); |
| 69 | return newbus; |
| 70 | } |
| 71 | |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 72 | static struct resource_node * __init alloc_resources (struct ebda_pci_rsrc *curr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | { |
| 74 | struct resource_node *rs; |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 75 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | if (!curr) { |
| 77 | err ("NULL passed to allocate\n"); |
| 78 | return NULL; |
| 79 | } |
| 80 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 81 | rs = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | if (!rs) { |
| 83 | err ("out of system memory\n"); |
| 84 | return NULL; |
| 85 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | rs->busno = curr->bus_num; |
| 87 | rs->devfunc = curr->dev_fun; |
| 88 | rs->start = curr->start_addr; |
| 89 | rs->end = curr->end_addr; |
| 90 | rs->len = curr->end_addr - curr->start_addr + 1; |
| 91 | return rs; |
| 92 | } |
| 93 | |
| 94 | static int __init alloc_bus_range (struct bus_node **new_bus, struct range_node **new_range, struct ebda_pci_rsrc *curr, int flag, u8 first_bus) |
| 95 | { |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 96 | struct bus_node *newbus; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | struct range_node *newrange; |
| 98 | u8 num_ranges = 0; |
| 99 | |
| 100 | if (first_bus) { |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 101 | newbus = kzalloc(sizeof(struct bus_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | if (!newbus) { |
| 103 | err ("out of system memory.\n"); |
| 104 | return -ENOMEM; |
| 105 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | newbus->busno = curr->bus_num; |
| 107 | } else { |
| 108 | newbus = *new_bus; |
| 109 | switch (flag) { |
| 110 | case MEM: |
| 111 | num_ranges = newbus->noMemRanges; |
| 112 | break; |
| 113 | case PFMEM: |
| 114 | num_ranges = newbus->noPFMemRanges; |
| 115 | break; |
| 116 | case IO: |
| 117 | num_ranges = newbus->noIORanges; |
| 118 | break; |
| 119 | } |
| 120 | } |
| 121 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 122 | newrange = kzalloc(sizeof(struct range_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | if (!newrange) { |
| 124 | if (first_bus) |
| 125 | kfree (newbus); |
| 126 | err ("out of system memory\n"); |
| 127 | return -ENOMEM; |
| 128 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | newrange->start = curr->start_addr; |
| 130 | newrange->end = curr->end_addr; |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 131 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | if (first_bus || (!num_ranges)) |
| 133 | newrange->rangeno = 1; |
| 134 | else { |
| 135 | /* need to insert our range */ |
H. Peter Anvin | c85e4aa | 2010-02-10 17:45:09 -0800 | [diff] [blame] | 136 | add_bus_range (flag, newrange, newbus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | debug ("%d resource Primary Bus inserted on bus %x [%x - %x]\n", flag, newbus->busno, newrange->start, newrange->end); |
| 138 | } |
| 139 | |
| 140 | switch (flag) { |
| 141 | case MEM: |
| 142 | newbus->rangeMem = newrange; |
| 143 | if (first_bus) |
| 144 | newbus->noMemRanges = 1; |
| 145 | else { |
| 146 | debug ("First Memory Primary on bus %x, [%x - %x]\n", newbus->busno, newrange->start, newrange->end); |
| 147 | ++newbus->noMemRanges; |
| 148 | fix_resources (newbus); |
| 149 | } |
| 150 | break; |
| 151 | case IO: |
| 152 | newbus->rangeIO = newrange; |
| 153 | if (first_bus) |
| 154 | newbus->noIORanges = 1; |
| 155 | else { |
| 156 | debug ("First IO Primary on bus %x, [%x - %x]\n", newbus->busno, newrange->start, newrange->end); |
| 157 | ++newbus->noIORanges; |
| 158 | fix_resources (newbus); |
| 159 | } |
| 160 | break; |
| 161 | case PFMEM: |
| 162 | newbus->rangePFMem = newrange; |
| 163 | if (first_bus) |
| 164 | newbus->noPFMemRanges = 1; |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 165 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | debug ("1st PFMemory Primary on Bus %x [%x - %x]\n", newbus->busno, newrange->start, newrange->end); |
| 167 | ++newbus->noPFMemRanges; |
| 168 | fix_resources (newbus); |
| 169 | } |
| 170 | |
| 171 | break; |
| 172 | } |
| 173 | |
| 174 | *new_bus = newbus; |
| 175 | *new_range = newrange; |
| 176 | return 0; |
| 177 | } |
| 178 | |
| 179 | |
| 180 | /* Notes: |
| 181 | * 1. The ranges are ordered. The buses are not ordered. (First come) |
| 182 | * |
| 183 | * 2. If cannot allocate out of PFMem range, allocate from Mem ranges. PFmemFromMem |
| 184 | * are not sorted. (no need since use mem node). To not change the entire code, we |
| 185 | * also add mem node whenever this case happens so as not to change |
| 186 | * ibmphp_check_mem_resource etc (and since it really is taking Mem resource) |
| 187 | */ |
| 188 | |
| 189 | /***************************************************************************** |
| 190 | * This is the Resource Management initialization function. It will go through |
| 191 | * the Resource list taken from EBDA and fill in this module's data structures |
| 192 | * |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 193 | * THIS IS NOT TAKING INTO CONSIDERATION IO RESTRICTIONS OF PRIMARY BUSES, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | * SINCE WE'RE GOING TO ASSUME FOR NOW WE DON'T HAVE THOSE ON OUR BUSES FOR NOW |
| 195 | * |
| 196 | * Input: ptr to the head of the resource list from EBDA |
| 197 | * Output: 0, -1 or error codes |
| 198 | ***************************************************************************/ |
| 199 | int __init ibmphp_rsrc_init (void) |
| 200 | { |
| 201 | struct ebda_pci_rsrc *curr; |
| 202 | struct range_node *newrange = NULL; |
| 203 | struct bus_node *newbus = NULL; |
| 204 | struct bus_node *bus_cur; |
| 205 | struct bus_node *bus_prev; |
| 206 | struct list_head *tmp; |
| 207 | struct resource_node *new_io = NULL; |
| 208 | struct resource_node *new_mem = NULL; |
| 209 | struct resource_node *new_pfmem = NULL; |
| 210 | int rc; |
| 211 | struct list_head *tmp_ebda; |
| 212 | |
| 213 | list_for_each (tmp_ebda, &ibmphp_ebda_pci_rsrc_head) { |
| 214 | curr = list_entry (tmp_ebda, struct ebda_pci_rsrc, ebda_pci_rsrc_list); |
| 215 | if (!(curr->rsrc_type & PCIDEVMASK)) { |
| 216 | /* EBDA still lists non PCI devices, so ignore... */ |
| 217 | debug ("this is not a PCI DEVICE in rsrc_init, please take care\n"); |
| 218 | // continue; |
| 219 | } |
| 220 | |
| 221 | /* this is a primary bus resource */ |
| 222 | if (curr->rsrc_type & PRIMARYBUSMASK) { |
| 223 | /* memory */ |
| 224 | if ((curr->rsrc_type & RESTYPE) == MMASK) { |
| 225 | /* no bus structure exists in place yet */ |
| 226 | if (list_empty (&gbuses)) { |
Quentin Lambert | 79e50e7 | 2014-09-07 20:03:32 +0200 | [diff] [blame^] | 227 | rc = alloc_bus_range(&newbus, &newrange, curr, MEM, 1); |
| 228 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | return rc; |
| 230 | list_add_tail (&newbus->bus_list, &gbuses); |
| 231 | debug ("gbuses = NULL, Memory Primary Bus %x [%x - %x]\n", newbus->busno, newrange->start, newrange->end); |
| 232 | } else { |
| 233 | bus_cur = find_bus_wprev (curr->bus_num, &bus_prev, 1); |
| 234 | /* found our bus */ |
| 235 | if (bus_cur) { |
| 236 | rc = alloc_bus_range (&bus_cur, &newrange, curr, MEM, 0); |
| 237 | if (rc) |
| 238 | return rc; |
| 239 | } else { |
| 240 | /* went through all the buses and didn't find ours, need to create a new bus node */ |
Quentin Lambert | 79e50e7 | 2014-09-07 20:03:32 +0200 | [diff] [blame^] | 241 | rc = alloc_bus_range(&newbus, &newrange, curr, MEM, 1); |
| 242 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | return rc; |
| 244 | |
| 245 | list_add_tail (&newbus->bus_list, &gbuses); |
| 246 | debug ("New Bus, Memory Primary Bus %x [%x - %x]\n", newbus->busno, newrange->start, newrange->end); |
| 247 | } |
| 248 | } |
| 249 | } else if ((curr->rsrc_type & RESTYPE) == PFMASK) { |
| 250 | /* prefetchable memory */ |
| 251 | if (list_empty (&gbuses)) { |
| 252 | /* no bus structure exists in place yet */ |
Quentin Lambert | 79e50e7 | 2014-09-07 20:03:32 +0200 | [diff] [blame^] | 253 | rc = alloc_bus_range(&newbus, &newrange, curr, PFMEM, 1); |
| 254 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | return rc; |
| 256 | list_add_tail (&newbus->bus_list, &gbuses); |
| 257 | debug ("gbuses = NULL, PFMemory Primary Bus %x [%x - %x]\n", newbus->busno, newrange->start, newrange->end); |
| 258 | } else { |
| 259 | bus_cur = find_bus_wprev (curr->bus_num, &bus_prev, 1); |
| 260 | if (bus_cur) { |
| 261 | /* found our bus */ |
| 262 | rc = alloc_bus_range (&bus_cur, &newrange, curr, PFMEM, 0); |
| 263 | if (rc) |
| 264 | return rc; |
| 265 | } else { |
| 266 | /* went through all the buses and didn't find ours, need to create a new bus node */ |
Quentin Lambert | 79e50e7 | 2014-09-07 20:03:32 +0200 | [diff] [blame^] | 267 | rc = alloc_bus_range(&newbus, &newrange, curr, PFMEM, 1); |
| 268 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | return rc; |
| 270 | list_add_tail (&newbus->bus_list, &gbuses); |
| 271 | debug ("1st Bus, PFMemory Primary Bus %x [%x - %x]\n", newbus->busno, newrange->start, newrange->end); |
| 272 | } |
| 273 | } |
| 274 | } else if ((curr->rsrc_type & RESTYPE) == IOMASK) { |
| 275 | /* IO */ |
| 276 | if (list_empty (&gbuses)) { |
| 277 | /* no bus structure exists in place yet */ |
Quentin Lambert | 79e50e7 | 2014-09-07 20:03:32 +0200 | [diff] [blame^] | 278 | rc = alloc_bus_range(&newbus, &newrange, curr, IO, 1); |
| 279 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | return rc; |
| 281 | list_add_tail (&newbus->bus_list, &gbuses); |
| 282 | debug ("gbuses = NULL, IO Primary Bus %x [%x - %x]\n", newbus->busno, newrange->start, newrange->end); |
| 283 | } else { |
| 284 | bus_cur = find_bus_wprev (curr->bus_num, &bus_prev, 1); |
| 285 | if (bus_cur) { |
| 286 | rc = alloc_bus_range (&bus_cur, &newrange, curr, IO, 0); |
| 287 | if (rc) |
| 288 | return rc; |
| 289 | } else { |
| 290 | /* went through all the buses and didn't find ours, need to create a new bus node */ |
Quentin Lambert | 79e50e7 | 2014-09-07 20:03:32 +0200 | [diff] [blame^] | 291 | rc = alloc_bus_range(&newbus, &newrange, curr, IO, 1); |
| 292 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | return rc; |
| 294 | list_add_tail (&newbus->bus_list, &gbuses); |
| 295 | debug ("1st Bus, IO Primary Bus %x [%x - %x]\n", newbus->busno, newrange->start, newrange->end); |
| 296 | } |
| 297 | } |
| 298 | |
| 299 | } else { |
| 300 | ; /* type is reserved WHAT TO DO IN THIS CASE??? |
| 301 | NOTHING TO DO??? */ |
| 302 | } |
| 303 | } else { |
| 304 | /* regular pci device resource */ |
| 305 | if ((curr->rsrc_type & RESTYPE) == MMASK) { |
| 306 | /* Memory resource */ |
| 307 | new_mem = alloc_resources (curr); |
| 308 | if (!new_mem) |
| 309 | return -ENOMEM; |
| 310 | new_mem->type = MEM; |
| 311 | /* |
| 312 | * if it didn't find the bus, means PCI dev |
| 313 | * came b4 the Primary Bus info, so need to |
| 314 | * create a bus rangeno becomes a problem... |
| 315 | * assign a -1 and then update once the range |
| 316 | * actually appears... |
| 317 | */ |
| 318 | if (ibmphp_add_resource (new_mem) < 0) { |
| 319 | newbus = alloc_error_bus (curr, 0, 0); |
| 320 | if (!newbus) |
| 321 | return -ENOMEM; |
| 322 | newbus->firstMem = new_mem; |
| 323 | ++newbus->needMemUpdate; |
| 324 | new_mem->rangeno = -1; |
| 325 | } |
| 326 | debug ("Memory resource for device %x, bus %x, [%x - %x]\n", new_mem->devfunc, new_mem->busno, new_mem->start, new_mem->end); |
| 327 | |
| 328 | } else if ((curr->rsrc_type & RESTYPE) == PFMASK) { |
| 329 | /* PFMemory resource */ |
| 330 | new_pfmem = alloc_resources (curr); |
| 331 | if (!new_pfmem) |
| 332 | return -ENOMEM; |
| 333 | new_pfmem->type = PFMEM; |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 334 | new_pfmem->fromMem = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | if (ibmphp_add_resource (new_pfmem) < 0) { |
| 336 | newbus = alloc_error_bus (curr, 0, 0); |
| 337 | if (!newbus) |
| 338 | return -ENOMEM; |
| 339 | newbus->firstPFMem = new_pfmem; |
| 340 | ++newbus->needPFMemUpdate; |
| 341 | new_pfmem->rangeno = -1; |
| 342 | } |
| 343 | |
| 344 | debug ("PFMemory resource for device %x, bus %x, [%x - %x]\n", new_pfmem->devfunc, new_pfmem->busno, new_pfmem->start, new_pfmem->end); |
| 345 | } else if ((curr->rsrc_type & RESTYPE) == IOMASK) { |
| 346 | /* IO resource */ |
| 347 | new_io = alloc_resources (curr); |
| 348 | if (!new_io) |
| 349 | return -ENOMEM; |
| 350 | new_io->type = IO; |
| 351 | |
| 352 | /* |
| 353 | * if it didn't find the bus, means PCI dev |
| 354 | * came b4 the Primary Bus info, so need to |
| 355 | * create a bus rangeno becomes a problem... |
| 356 | * Can assign a -1 and then update once the |
| 357 | * range actually appears... |
| 358 | */ |
| 359 | if (ibmphp_add_resource (new_io) < 0) { |
| 360 | newbus = alloc_error_bus (curr, 0, 0); |
| 361 | if (!newbus) |
| 362 | return -ENOMEM; |
| 363 | newbus->firstIO = new_io; |
| 364 | ++newbus->needIOUpdate; |
| 365 | new_io->rangeno = -1; |
| 366 | } |
| 367 | debug ("IO resource for device %x, bus %x, [%x - %x]\n", new_io->devfunc, new_io->busno, new_io->start, new_io->end); |
| 368 | } |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | list_for_each (tmp, &gbuses) { |
| 373 | bus_cur = list_entry (tmp, struct bus_node, bus_list); |
| 374 | /* This is to get info about PPB resources, since EBDA doesn't put this info into the primary bus info */ |
| 375 | rc = update_bridge_ranges (&bus_cur); |
| 376 | if (rc) |
| 377 | return rc; |
| 378 | } |
| 379 | rc = once_over (); /* This is to align ranges (so no -1) */ |
| 380 | if (rc) |
| 381 | return rc; |
| 382 | return 0; |
| 383 | } |
| 384 | |
| 385 | /******************************************************************************** |
| 386 | * This function adds a range into a sorted list of ranges per bus for a particular |
| 387 | * range type, it then calls another routine to update the range numbers on the |
| 388 | * pci devices' resources for the appropriate resource |
| 389 | * |
| 390 | * Input: type of the resource, range to add, current bus |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 391 | * Output: 0 or -1, bus and range ptrs |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | ********************************************************************************/ |
H. Peter Anvin | c85e4aa | 2010-02-10 17:45:09 -0800 | [diff] [blame] | 393 | static int add_bus_range (int type, struct range_node *range, struct bus_node *bus_cur) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | { |
| 395 | struct range_node *range_cur = NULL; |
| 396 | struct range_node *range_prev; |
| 397 | int count = 0, i_init; |
| 398 | int noRanges = 0; |
| 399 | |
| 400 | switch (type) { |
| 401 | case MEM: |
| 402 | range_cur = bus_cur->rangeMem; |
| 403 | noRanges = bus_cur->noMemRanges; |
| 404 | break; |
| 405 | case PFMEM: |
| 406 | range_cur = bus_cur->rangePFMem; |
| 407 | noRanges = bus_cur->noPFMemRanges; |
| 408 | break; |
| 409 | case IO: |
| 410 | range_cur = bus_cur->rangeIO; |
| 411 | noRanges = bus_cur->noIORanges; |
| 412 | break; |
| 413 | } |
| 414 | |
| 415 | range_prev = NULL; |
| 416 | while (range_cur) { |
| 417 | if (range->start < range_cur->start) |
| 418 | break; |
| 419 | range_prev = range_cur; |
| 420 | range_cur = range_cur->next; |
| 421 | count = count + 1; |
| 422 | } |
| 423 | if (!count) { |
| 424 | /* our range will go at the beginning of the list */ |
| 425 | switch (type) { |
| 426 | case MEM: |
| 427 | bus_cur->rangeMem = range; |
| 428 | break; |
| 429 | case PFMEM: |
| 430 | bus_cur->rangePFMem = range; |
| 431 | break; |
| 432 | case IO: |
| 433 | bus_cur->rangeIO = range; |
| 434 | break; |
| 435 | } |
| 436 | range->next = range_cur; |
| 437 | range->rangeno = 1; |
| 438 | i_init = 0; |
| 439 | } else if (!range_cur) { |
| 440 | /* our range will go at the end of the list */ |
| 441 | range->next = NULL; |
| 442 | range_prev->next = range; |
| 443 | range->rangeno = range_prev->rangeno + 1; |
| 444 | return 0; |
| 445 | } else { |
| 446 | /* the range is in the middle */ |
| 447 | range_prev->next = range; |
| 448 | range->next = range_cur; |
| 449 | range->rangeno = range_cur->rangeno; |
| 450 | i_init = range_prev->rangeno; |
| 451 | } |
| 452 | |
| 453 | for (count = i_init; count < noRanges; ++count) { |
| 454 | ++range_cur->rangeno; |
| 455 | range_cur = range_cur->next; |
| 456 | } |
| 457 | |
| 458 | update_resources (bus_cur, type, i_init + 1); |
| 459 | return 0; |
| 460 | } |
| 461 | |
| 462 | /******************************************************************************* |
| 463 | * This routine goes through the list of resources of type 'type' and updates |
H. Peter Anvin | c85e4aa | 2010-02-10 17:45:09 -0800 | [diff] [blame] | 464 | * the range numbers that they correspond to. It was called from add_bus_range fnc |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | * |
| 466 | * Input: bus, type of the resource, the rangeno starting from which to update |
| 467 | ******************************************************************************/ |
| 468 | static void update_resources (struct bus_node *bus_cur, int type, int rangeno) |
| 469 | { |
| 470 | struct resource_node *res = NULL; |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 471 | u8 eol = 0; /* end of list indicator */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | |
| 473 | switch (type) { |
| 474 | case MEM: |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 475 | if (bus_cur->firstMem) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | res = bus_cur->firstMem; |
| 477 | break; |
| 478 | case PFMEM: |
| 479 | if (bus_cur->firstPFMem) |
| 480 | res = bus_cur->firstPFMem; |
| 481 | break; |
| 482 | case IO: |
| 483 | if (bus_cur->firstIO) |
| 484 | res = bus_cur->firstIO; |
| 485 | break; |
| 486 | } |
| 487 | |
| 488 | if (res) { |
| 489 | while (res) { |
| 490 | if (res->rangeno == rangeno) |
| 491 | break; |
| 492 | if (res->next) |
| 493 | res = res->next; |
| 494 | else if (res->nextRange) |
| 495 | res = res->nextRange; |
| 496 | else { |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 497 | eol = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | break; |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | if (!eol) { |
| 503 | /* found the range */ |
| 504 | while (res) { |
| 505 | ++res->rangeno; |
| 506 | res = res->next; |
| 507 | } |
| 508 | } |
| 509 | } |
| 510 | } |
| 511 | |
| 512 | static void fix_me (struct resource_node *res, struct bus_node *bus_cur, struct range_node *range) |
| 513 | { |
| 514 | char * str = ""; |
| 515 | switch (res->type) { |
| 516 | case IO: |
| 517 | str = "io"; |
| 518 | break; |
| 519 | case MEM: |
| 520 | str = "mem"; |
| 521 | break; |
| 522 | case PFMEM: |
| 523 | str = "pfmem"; |
| 524 | break; |
| 525 | } |
| 526 | |
| 527 | while (res) { |
| 528 | if (res->rangeno == -1) { |
| 529 | while (range) { |
| 530 | if ((res->start >= range->start) && (res->end <= range->end)) { |
| 531 | res->rangeno = range->rangeno; |
| 532 | debug ("%s->rangeno in fix_resources is %d\n", str, res->rangeno); |
| 533 | switch (res->type) { |
| 534 | case IO: |
| 535 | --bus_cur->needIOUpdate; |
| 536 | break; |
| 537 | case MEM: |
| 538 | --bus_cur->needMemUpdate; |
| 539 | break; |
| 540 | case PFMEM: |
| 541 | --bus_cur->needPFMemUpdate; |
| 542 | break; |
| 543 | } |
| 544 | break; |
| 545 | } |
| 546 | range = range->next; |
| 547 | } |
| 548 | } |
| 549 | if (res->next) |
| 550 | res = res->next; |
| 551 | else |
| 552 | res = res->nextRange; |
| 553 | } |
| 554 | |
| 555 | } |
| 556 | |
| 557 | /***************************************************************************** |
| 558 | * This routine reassigns the range numbers to the resources that had a -1 |
| 559 | * This case can happen only if upon initialization, resources taken by pci dev |
| 560 | * appear in EBDA before the resources allocated for that bus, since we don't |
| 561 | * know the range, we assign -1, and this routine is called after a new range |
| 562 | * is assigned to see the resources with unknown range belong to the added range |
| 563 | * |
| 564 | * Input: current bus |
| 565 | * Output: none, list of resources for that bus are fixed if can be |
| 566 | *******************************************************************************/ |
| 567 | static void fix_resources (struct bus_node *bus_cur) |
| 568 | { |
| 569 | struct range_node *range; |
| 570 | struct resource_node *res; |
| 571 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 572 | debug ("%s - bus_cur->busno = %d\n", __func__, bus_cur->busno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | |
| 574 | if (bus_cur->needIOUpdate) { |
| 575 | res = bus_cur->firstIO; |
| 576 | range = bus_cur->rangeIO; |
| 577 | fix_me (res, bus_cur, range); |
| 578 | } |
| 579 | if (bus_cur->needMemUpdate) { |
| 580 | res = bus_cur->firstMem; |
| 581 | range = bus_cur->rangeMem; |
| 582 | fix_me (res, bus_cur, range); |
| 583 | } |
| 584 | if (bus_cur->needPFMemUpdate) { |
| 585 | res = bus_cur->firstPFMem; |
| 586 | range = bus_cur->rangePFMem; |
| 587 | fix_me (res, bus_cur, range); |
| 588 | } |
| 589 | } |
| 590 | |
| 591 | /******************************************************************************* |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 592 | * This routine adds a resource to the list of resources to the appropriate bus |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | * based on their resource type and sorted by their starting addresses. It assigns |
| 594 | * the ptrs to next and nextRange if needed. |
| 595 | * |
| 596 | * Input: resource ptr |
| 597 | * Output: ptrs assigned (to the node) |
| 598 | * 0 or -1 |
| 599 | *******************************************************************************/ |
| 600 | int ibmphp_add_resource (struct resource_node *res) |
| 601 | { |
| 602 | struct resource_node *res_cur; |
| 603 | struct resource_node *res_prev; |
| 604 | struct bus_node *bus_cur; |
| 605 | struct range_node *range_cur = NULL; |
| 606 | struct resource_node *res_start = NULL; |
| 607 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 608 | debug ("%s - enter\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | |
| 610 | if (!res) { |
| 611 | err ("NULL passed to add\n"); |
| 612 | return -ENODEV; |
| 613 | } |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 614 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | bus_cur = find_bus_wprev (res->busno, NULL, 0); |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 616 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | if (!bus_cur) { |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 618 | /* didn't find a bus, something's wrong!!! */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | debug ("no bus in the system, either pci_dev's wrong or allocation failed\n"); |
| 620 | return -ENODEV; |
| 621 | } |
| 622 | |
| 623 | /* Normal case */ |
| 624 | switch (res->type) { |
| 625 | case IO: |
| 626 | range_cur = bus_cur->rangeIO; |
| 627 | res_start = bus_cur->firstIO; |
| 628 | break; |
| 629 | case MEM: |
| 630 | range_cur = bus_cur->rangeMem; |
| 631 | res_start = bus_cur->firstMem; |
| 632 | break; |
| 633 | case PFMEM: |
| 634 | range_cur = bus_cur->rangePFMem; |
| 635 | res_start = bus_cur->firstPFMem; |
| 636 | break; |
| 637 | default: |
| 638 | err ("cannot read the type of the resource to add... problem\n"); |
| 639 | return -EINVAL; |
| 640 | } |
| 641 | while (range_cur) { |
| 642 | if ((res->start >= range_cur->start) && (res->end <= range_cur->end)) { |
| 643 | res->rangeno = range_cur->rangeno; |
| 644 | break; |
| 645 | } |
| 646 | range_cur = range_cur->next; |
| 647 | } |
| 648 | |
| 649 | /* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
| 650 | * this is again the case of rangeno = -1 |
| 651 | * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
| 652 | */ |
| 653 | |
| 654 | if (!range_cur) { |
| 655 | switch (res->type) { |
| 656 | case IO: |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 657 | ++bus_cur->needIOUpdate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | break; |
| 659 | case MEM: |
| 660 | ++bus_cur->needMemUpdate; |
| 661 | break; |
| 662 | case PFMEM: |
| 663 | ++bus_cur->needPFMemUpdate; |
| 664 | break; |
| 665 | } |
| 666 | res->rangeno = -1; |
| 667 | } |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 668 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | debug ("The range is %d\n", res->rangeno); |
| 670 | if (!res_start) { |
| 671 | /* no first{IO,Mem,Pfmem} on the bus, 1st IO/Mem/Pfmem resource ever */ |
| 672 | switch (res->type) { |
| 673 | case IO: |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 674 | bus_cur->firstIO = res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | break; |
| 676 | case MEM: |
| 677 | bus_cur->firstMem = res; |
| 678 | break; |
| 679 | case PFMEM: |
| 680 | bus_cur->firstPFMem = res; |
| 681 | break; |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 682 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | res->next = NULL; |
| 684 | res->nextRange = NULL; |
| 685 | } else { |
| 686 | res_cur = res_start; |
| 687 | res_prev = NULL; |
| 688 | |
| 689 | debug ("res_cur->rangeno is %d\n", res_cur->rangeno); |
| 690 | |
| 691 | while (res_cur) { |
| 692 | if (res_cur->rangeno >= res->rangeno) |
| 693 | break; |
| 694 | res_prev = res_cur; |
| 695 | if (res_cur->next) |
| 696 | res_cur = res_cur->next; |
| 697 | else |
| 698 | res_cur = res_cur->nextRange; |
| 699 | } |
| 700 | |
| 701 | if (!res_cur) { |
| 702 | /* at the end of the resource list */ |
| 703 | debug ("i should be here, [%x - %x]\n", res->start, res->end); |
| 704 | res_prev->nextRange = res; |
| 705 | res->next = NULL; |
| 706 | res->nextRange = NULL; |
| 707 | } else if (res_cur->rangeno == res->rangeno) { |
| 708 | /* in the same range */ |
| 709 | while (res_cur) { |
| 710 | if (res->start < res_cur->start) |
| 711 | break; |
| 712 | res_prev = res_cur; |
| 713 | res_cur = res_cur->next; |
| 714 | } |
| 715 | if (!res_cur) { |
| 716 | /* the last resource in this range */ |
| 717 | res_prev->next = res; |
| 718 | res->next = NULL; |
| 719 | res->nextRange = res_prev->nextRange; |
| 720 | res_prev->nextRange = NULL; |
| 721 | } else if (res->start < res_cur->start) { |
| 722 | /* at the beginning or middle of the range */ |
| 723 | if (!res_prev) { |
| 724 | switch (res->type) { |
| 725 | case IO: |
| 726 | bus_cur->firstIO = res; |
| 727 | break; |
| 728 | case MEM: |
| 729 | bus_cur->firstMem = res; |
| 730 | break; |
| 731 | case PFMEM: |
| 732 | bus_cur->firstPFMem = res; |
| 733 | break; |
| 734 | } |
| 735 | } else if (res_prev->rangeno == res_cur->rangeno) |
| 736 | res_prev->next = res; |
| 737 | else |
| 738 | res_prev->nextRange = res; |
| 739 | |
| 740 | res->next = res_cur; |
| 741 | res->nextRange = NULL; |
| 742 | } |
| 743 | } else { |
| 744 | /* this is the case where it is 1st occurrence of the range */ |
| 745 | if (!res_prev) { |
| 746 | /* at the beginning of the resource list */ |
| 747 | res->next = NULL; |
| 748 | switch (res->type) { |
| 749 | case IO: |
| 750 | res->nextRange = bus_cur->firstIO; |
| 751 | bus_cur->firstIO = res; |
| 752 | break; |
| 753 | case MEM: |
| 754 | res->nextRange = bus_cur->firstMem; |
| 755 | bus_cur->firstMem = res; |
| 756 | break; |
| 757 | case PFMEM: |
| 758 | res->nextRange = bus_cur->firstPFMem; |
| 759 | bus_cur->firstPFMem = res; |
| 760 | break; |
| 761 | } |
| 762 | } else if (res_cur->rangeno > res->rangeno) { |
| 763 | /* in the middle of the resource list */ |
| 764 | res_prev->nextRange = res; |
| 765 | res->next = NULL; |
| 766 | res->nextRange = res_cur; |
| 767 | } |
| 768 | } |
| 769 | } |
| 770 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 771 | debug ("%s - exit\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | return 0; |
| 773 | } |
| 774 | |
| 775 | /**************************************************************************** |
| 776 | * This routine will remove the resource from the list of resources |
| 777 | * |
| 778 | * Input: io, mem, and/or pfmem resource to be deleted |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 779 | * Output: modified resource list |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | * 0 or error code |
| 781 | ****************************************************************************/ |
| 782 | int ibmphp_remove_resource (struct resource_node *res) |
| 783 | { |
| 784 | struct bus_node *bus_cur; |
| 785 | struct resource_node *res_cur = NULL; |
| 786 | struct resource_node *res_prev; |
| 787 | struct resource_node *mem_cur; |
| 788 | char * type = ""; |
| 789 | |
| 790 | if (!res) { |
| 791 | err ("resource to remove is NULL\n"); |
| 792 | return -ENODEV; |
| 793 | } |
| 794 | |
| 795 | bus_cur = find_bus_wprev (res->busno, NULL, 0); |
| 796 | |
| 797 | if (!bus_cur) { |
Ryan Desfosses | 227f064 | 2014-04-18 20:13:50 -0400 | [diff] [blame] | 798 | err ("cannot find corresponding bus of the io resource to remove bailing out...\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | return -ENODEV; |
| 800 | } |
| 801 | |
| 802 | switch (res->type) { |
| 803 | case IO: |
| 804 | res_cur = bus_cur->firstIO; |
| 805 | type = "io"; |
| 806 | break; |
| 807 | case MEM: |
| 808 | res_cur = bus_cur->firstMem; |
| 809 | type = "mem"; |
| 810 | break; |
| 811 | case PFMEM: |
| 812 | res_cur = bus_cur->firstPFMem; |
| 813 | type = "pfmem"; |
| 814 | break; |
| 815 | default: |
| 816 | err ("unknown type for resource to remove\n"); |
| 817 | return -EINVAL; |
| 818 | } |
| 819 | res_prev = NULL; |
| 820 | |
| 821 | while (res_cur) { |
| 822 | if ((res_cur->start == res->start) && (res_cur->end == res->end)) |
| 823 | break; |
| 824 | res_prev = res_cur; |
| 825 | if (res_cur->next) |
| 826 | res_cur = res_cur->next; |
| 827 | else |
| 828 | res_cur = res_cur->nextRange; |
| 829 | } |
| 830 | |
| 831 | if (!res_cur) { |
| 832 | if (res->type == PFMEM) { |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 833 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | * case where pfmem might be in the PFMemFromMem list |
| 835 | * so will also need to remove the corresponding mem |
| 836 | * entry |
| 837 | */ |
| 838 | res_cur = bus_cur->firstPFMemFromMem; |
| 839 | res_prev = NULL; |
| 840 | |
| 841 | while (res_cur) { |
| 842 | if ((res_cur->start == res->start) && (res_cur->end == res->end)) { |
| 843 | mem_cur = bus_cur->firstMem; |
| 844 | while (mem_cur) { |
| 845 | if ((mem_cur->start == res_cur->start) |
| 846 | && (mem_cur->end == res_cur->end)) |
| 847 | break; |
| 848 | if (mem_cur->next) |
| 849 | mem_cur = mem_cur->next; |
| 850 | else |
| 851 | mem_cur = mem_cur->nextRange; |
| 852 | } |
| 853 | if (!mem_cur) { |
| 854 | err ("cannot find corresponding mem node for pfmem...\n"); |
| 855 | return -EINVAL; |
| 856 | } |
| 857 | |
| 858 | ibmphp_remove_resource (mem_cur); |
| 859 | if (!res_prev) |
| 860 | bus_cur->firstPFMemFromMem = res_cur->next; |
| 861 | else |
| 862 | res_prev->next = res_cur->next; |
| 863 | kfree (res_cur); |
| 864 | return 0; |
| 865 | } |
| 866 | res_prev = res_cur; |
| 867 | if (res_cur->next) |
| 868 | res_cur = res_cur->next; |
| 869 | else |
| 870 | res_cur = res_cur->nextRange; |
| 871 | } |
| 872 | if (!res_cur) { |
| 873 | err ("cannot find pfmem to delete...\n"); |
| 874 | return -EINVAL; |
| 875 | } |
| 876 | } else { |
| 877 | err ("the %s resource is not in the list to be deleted...\n", type); |
| 878 | return -EINVAL; |
| 879 | } |
| 880 | } |
| 881 | if (!res_prev) { |
| 882 | /* first device to be deleted */ |
| 883 | if (res_cur->next) { |
| 884 | switch (res->type) { |
| 885 | case IO: |
| 886 | bus_cur->firstIO = res_cur->next; |
| 887 | break; |
| 888 | case MEM: |
| 889 | bus_cur->firstMem = res_cur->next; |
| 890 | break; |
| 891 | case PFMEM: |
| 892 | bus_cur->firstPFMem = res_cur->next; |
| 893 | break; |
| 894 | } |
| 895 | } else if (res_cur->nextRange) { |
| 896 | switch (res->type) { |
| 897 | case IO: |
| 898 | bus_cur->firstIO = res_cur->nextRange; |
| 899 | break; |
| 900 | case MEM: |
| 901 | bus_cur->firstMem = res_cur->nextRange; |
| 902 | break; |
| 903 | case PFMEM: |
| 904 | bus_cur->firstPFMem = res_cur->nextRange; |
| 905 | break; |
| 906 | } |
| 907 | } else { |
| 908 | switch (res->type) { |
| 909 | case IO: |
| 910 | bus_cur->firstIO = NULL; |
| 911 | break; |
| 912 | case MEM: |
| 913 | bus_cur->firstMem = NULL; |
| 914 | break; |
| 915 | case PFMEM: |
| 916 | bus_cur->firstPFMem = NULL; |
| 917 | break; |
| 918 | } |
| 919 | } |
| 920 | kfree (res_cur); |
| 921 | return 0; |
| 922 | } else { |
| 923 | if (res_cur->next) { |
| 924 | if (res_prev->rangeno == res_cur->rangeno) |
| 925 | res_prev->next = res_cur->next; |
| 926 | else |
| 927 | res_prev->nextRange = res_cur->next; |
| 928 | } else if (res_cur->nextRange) { |
| 929 | res_prev->next = NULL; |
| 930 | res_prev->nextRange = res_cur->nextRange; |
| 931 | } else { |
| 932 | res_prev->next = NULL; |
| 933 | res_prev->nextRange = NULL; |
| 934 | } |
| 935 | kfree (res_cur); |
| 936 | return 0; |
| 937 | } |
| 938 | |
| 939 | return 0; |
| 940 | } |
| 941 | |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 942 | static struct range_node *find_range (struct bus_node *bus_cur, struct resource_node *res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | { |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 944 | struct range_node *range = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
| 946 | switch (res->type) { |
| 947 | case IO: |
| 948 | range = bus_cur->rangeIO; |
| 949 | break; |
| 950 | case MEM: |
| 951 | range = bus_cur->rangeMem; |
| 952 | break; |
| 953 | case PFMEM: |
| 954 | range = bus_cur->rangePFMem; |
| 955 | break; |
| 956 | default: |
| 957 | err ("cannot read resource type in find_range\n"); |
| 958 | } |
| 959 | |
| 960 | while (range) { |
| 961 | if (res->rangeno == range->rangeno) |
| 962 | break; |
| 963 | range = range->next; |
| 964 | } |
| 965 | return range; |
| 966 | } |
| 967 | |
| 968 | /***************************************************************************** |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 969 | * This routine will check to make sure the io/mem/pfmem->len that the device asked for |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | * can fit w/i our list of available IO/MEM/PFMEM resources. If cannot, returns -EINVAL, |
| 971 | * otherwise, returns 0 |
| 972 | * |
| 973 | * Input: resource |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 974 | * Output: the correct start and end address are inputted into the resource node, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | * 0 or -EINVAL |
| 976 | *****************************************************************************/ |
| 977 | int ibmphp_check_resource (struct resource_node *res, u8 bridge) |
| 978 | { |
| 979 | struct bus_node *bus_cur; |
| 980 | struct range_node *range = NULL; |
| 981 | struct resource_node *res_prev; |
| 982 | struct resource_node *res_cur = NULL; |
| 983 | u32 len_cur = 0, start_cur = 0, len_tmp = 0; |
| 984 | int noranges = 0; |
| 985 | u32 tmp_start; /* this is to make sure start address is divisible by the length needed */ |
| 986 | u32 tmp_divide; |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 987 | u8 flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | |
| 989 | if (!res) |
| 990 | return -EINVAL; |
| 991 | |
| 992 | if (bridge) { |
| 993 | /* The rules for bridges are different, 4K divisible for IO, 1M for (pf)mem*/ |
| 994 | if (res->type == IO) |
| 995 | tmp_divide = IOBRIDGE; |
| 996 | else |
| 997 | tmp_divide = MEMBRIDGE; |
| 998 | } else |
| 999 | tmp_divide = res->len; |
| 1000 | |
| 1001 | bus_cur = find_bus_wprev (res->busno, NULL, 0); |
| 1002 | |
| 1003 | if (!bus_cur) { |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1004 | /* didn't find a bus, something's wrong!!! */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | debug ("no bus in the system, either pci_dev's wrong or allocation failed\n"); |
| 1006 | return -EINVAL; |
| 1007 | } |
| 1008 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 1009 | debug ("%s - enter\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | debug ("bus_cur->busno is %d\n", bus_cur->busno); |
| 1011 | |
| 1012 | /* This is a quick fix to not mess up with the code very much. i.e., |
| 1013 | * 2000-2fff, len = 1000, but when we compare, we need it to be fff */ |
| 1014 | res->len -= 1; |
| 1015 | |
| 1016 | switch (res->type) { |
| 1017 | case IO: |
| 1018 | res_cur = bus_cur->firstIO; |
| 1019 | noranges = bus_cur->noIORanges; |
| 1020 | break; |
| 1021 | case MEM: |
| 1022 | res_cur = bus_cur->firstMem; |
| 1023 | noranges = bus_cur->noMemRanges; |
| 1024 | break; |
| 1025 | case PFMEM: |
| 1026 | res_cur = bus_cur->firstPFMem; |
| 1027 | noranges = bus_cur->noPFMemRanges; |
| 1028 | break; |
| 1029 | default: |
| 1030 | err ("wrong type of resource to check\n"); |
| 1031 | return -EINVAL; |
| 1032 | } |
| 1033 | res_prev = NULL; |
| 1034 | |
| 1035 | while (res_cur) { |
| 1036 | range = find_range (bus_cur, res_cur); |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 1037 | debug ("%s - rangeno = %d\n", __func__, res_cur->rangeno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | |
| 1039 | if (!range) { |
| 1040 | err ("no range for the device exists... bailing out...\n"); |
| 1041 | return -EINVAL; |
| 1042 | } |
| 1043 | |
| 1044 | /* found our range */ |
| 1045 | if (!res_prev) { |
| 1046 | /* first time in the loop */ |
| 1047 | if ((res_cur->start != range->start) && ((len_tmp = res_cur->start - 1 - range->start) >= res->len)) { |
| 1048 | debug ("len_tmp = %x\n", len_tmp); |
| 1049 | |
| 1050 | if ((len_tmp < len_cur) || (len_cur == 0)) { |
| 1051 | |
| 1052 | if ((range->start % tmp_divide) == 0) { |
| 1053 | /* just perfect, starting address is divisible by length */ |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1054 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | len_cur = len_tmp; |
| 1056 | start_cur = range->start; |
| 1057 | } else { |
| 1058 | /* Needs adjusting */ |
| 1059 | tmp_start = range->start; |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1060 | flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | |
| 1062 | while ((len_tmp = res_cur->start - 1 - tmp_start) >= res->len) { |
| 1063 | if ((tmp_start % tmp_divide) == 0) { |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1064 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | len_cur = len_tmp; |
| 1066 | start_cur = tmp_start; |
| 1067 | break; |
| 1068 | } |
| 1069 | tmp_start += tmp_divide - tmp_start % tmp_divide; |
| 1070 | if (tmp_start >= res_cur->start - 1) |
| 1071 | break; |
| 1072 | } |
| 1073 | } |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1074 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | if (flag && len_cur == res->len) { |
| 1076 | debug ("but we are not here, right?\n"); |
| 1077 | res->start = start_cur; |
| 1078 | res->len += 1; /* To restore the balance */ |
| 1079 | res->end = res->start + res->len - 1; |
| 1080 | return 0; |
| 1081 | } |
| 1082 | } |
| 1083 | } |
| 1084 | } |
| 1085 | if (!res_cur->next) { |
| 1086 | /* last device on the range */ |
| 1087 | if ((range->end != res_cur->end) && ((len_tmp = range->end - (res_cur->end + 1)) >= res->len)) { |
| 1088 | debug ("len_tmp = %x\n", len_tmp); |
| 1089 | if ((len_tmp < len_cur) || (len_cur == 0)) { |
| 1090 | |
| 1091 | if (((res_cur->end + 1) % tmp_divide) == 0) { |
| 1092 | /* just perfect, starting address is divisible by length */ |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1093 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | len_cur = len_tmp; |
| 1095 | start_cur = res_cur->end + 1; |
| 1096 | } else { |
| 1097 | /* Needs adjusting */ |
| 1098 | tmp_start = res_cur->end + 1; |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1099 | flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | |
| 1101 | while ((len_tmp = range->end - tmp_start) >= res->len) { |
| 1102 | if ((tmp_start % tmp_divide) == 0) { |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1103 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | len_cur = len_tmp; |
| 1105 | start_cur = tmp_start; |
| 1106 | break; |
| 1107 | } |
| 1108 | tmp_start += tmp_divide - tmp_start % tmp_divide; |
| 1109 | if (tmp_start >= range->end) |
| 1110 | break; |
| 1111 | } |
| 1112 | } |
| 1113 | if (flag && len_cur == res->len) { |
| 1114 | res->start = start_cur; |
| 1115 | res->len += 1; /* To restore the balance */ |
| 1116 | res->end = res->start + res->len - 1; |
| 1117 | return 0; |
| 1118 | } |
| 1119 | } |
| 1120 | } |
| 1121 | } |
| 1122 | |
| 1123 | if (res_prev) { |
| 1124 | if (res_prev->rangeno != res_cur->rangeno) { |
| 1125 | /* 1st device on this range */ |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1126 | if ((res_cur->start != range->start) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | ((len_tmp = res_cur->start - 1 - range->start) >= res->len)) { |
| 1128 | if ((len_tmp < len_cur) || (len_cur == 0)) { |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1129 | if ((range->start % tmp_divide) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | /* just perfect, starting address is divisible by length */ |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1131 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | len_cur = len_tmp; |
| 1133 | start_cur = range->start; |
| 1134 | } else { |
| 1135 | /* Needs adjusting */ |
| 1136 | tmp_start = range->start; |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1137 | flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | |
| 1139 | while ((len_tmp = res_cur->start - 1 - tmp_start) >= res->len) { |
| 1140 | if ((tmp_start % tmp_divide) == 0) { |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1141 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | len_cur = len_tmp; |
| 1143 | start_cur = tmp_start; |
| 1144 | break; |
| 1145 | } |
| 1146 | tmp_start += tmp_divide - tmp_start % tmp_divide; |
| 1147 | if (tmp_start >= res_cur->start - 1) |
| 1148 | break; |
| 1149 | } |
| 1150 | } |
| 1151 | |
| 1152 | if (flag && len_cur == res->len) { |
| 1153 | res->start = start_cur; |
| 1154 | res->len += 1; /* To restore the balance */ |
| 1155 | res->end = res->start + res->len - 1; |
| 1156 | return 0; |
| 1157 | } |
| 1158 | } |
| 1159 | } |
| 1160 | } else { |
| 1161 | /* in the same range */ |
Quentin Lambert | 79e50e7 | 2014-09-07 20:03:32 +0200 | [diff] [blame^] | 1162 | len_tmp = res_cur->start - 1 - res_prev->end - 1; |
| 1163 | |
| 1164 | if (len_tmp >= res->len) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | if ((len_tmp < len_cur) || (len_cur == 0)) { |
| 1166 | if (((res_prev->end + 1) % tmp_divide) == 0) { |
| 1167 | /* just perfect, starting address's divisible by length */ |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1168 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | len_cur = len_tmp; |
| 1170 | start_cur = res_prev->end + 1; |
| 1171 | } else { |
| 1172 | /* Needs adjusting */ |
| 1173 | tmp_start = res_prev->end + 1; |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1174 | flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | |
| 1176 | while ((len_tmp = res_cur->start - 1 - tmp_start) >= res->len) { |
| 1177 | if ((tmp_start % tmp_divide) == 0) { |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1178 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | len_cur = len_tmp; |
| 1180 | start_cur = tmp_start; |
| 1181 | break; |
| 1182 | } |
| 1183 | tmp_start += tmp_divide - tmp_start % tmp_divide; |
| 1184 | if (tmp_start >= res_cur->start - 1) |
| 1185 | break; |
| 1186 | } |
| 1187 | } |
| 1188 | |
| 1189 | if (flag && len_cur == res->len) { |
| 1190 | res->start = start_cur; |
| 1191 | res->len += 1; /* To restore the balance */ |
| 1192 | res->end = res->start + res->len - 1; |
| 1193 | return 0; |
| 1194 | } |
| 1195 | } |
| 1196 | } |
| 1197 | } |
| 1198 | } |
| 1199 | /* end if (res_prev) */ |
| 1200 | res_prev = res_cur; |
| 1201 | if (res_cur->next) |
| 1202 | res_cur = res_cur->next; |
| 1203 | else |
| 1204 | res_cur = res_cur->nextRange; |
| 1205 | } /* end of while */ |
| 1206 | |
| 1207 | |
| 1208 | if (!res_prev) { |
| 1209 | /* 1st device ever */ |
| 1210 | /* need to find appropriate range */ |
| 1211 | switch (res->type) { |
| 1212 | case IO: |
| 1213 | range = bus_cur->rangeIO; |
| 1214 | break; |
| 1215 | case MEM: |
| 1216 | range = bus_cur->rangeMem; |
| 1217 | break; |
| 1218 | case PFMEM: |
| 1219 | range = bus_cur->rangePFMem; |
| 1220 | break; |
| 1221 | } |
| 1222 | while (range) { |
Quentin Lambert | 79e50e7 | 2014-09-07 20:03:32 +0200 | [diff] [blame^] | 1223 | len_tmp = range->end - range->start; |
| 1224 | |
| 1225 | if (len_tmp >= res->len) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1226 | if ((len_tmp < len_cur) || (len_cur == 0)) { |
| 1227 | if ((range->start % tmp_divide) == 0) { |
| 1228 | /* just perfect, starting address's divisible by length */ |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1229 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | len_cur = len_tmp; |
| 1231 | start_cur = range->start; |
| 1232 | } else { |
| 1233 | /* Needs adjusting */ |
| 1234 | tmp_start = range->start; |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1235 | flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | |
| 1237 | while ((len_tmp = range->end - tmp_start) >= res->len) { |
| 1238 | if ((tmp_start % tmp_divide) == 0) { |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1239 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | len_cur = len_tmp; |
| 1241 | start_cur = tmp_start; |
| 1242 | break; |
| 1243 | } |
| 1244 | tmp_start += tmp_divide - tmp_start % tmp_divide; |
| 1245 | if (tmp_start >= range->end) |
| 1246 | break; |
| 1247 | } |
| 1248 | } |
| 1249 | |
| 1250 | if (flag && len_cur == res->len) { |
| 1251 | res->start = start_cur; |
| 1252 | res->len += 1; /* To restore the balance */ |
| 1253 | res->end = res->start + res->len - 1; |
| 1254 | return 0; |
| 1255 | } |
| 1256 | } |
| 1257 | } |
| 1258 | range = range->next; |
| 1259 | } /* end of while */ |
| 1260 | |
| 1261 | if ((!range) && (len_cur == 0)) { |
| 1262 | /* have gone through the list of devices and ranges and haven't found n.e.thing */ |
| 1263 | err ("no appropriate range.. bailing out...\n"); |
| 1264 | return -EINVAL; |
| 1265 | } else if (len_cur) { |
| 1266 | res->start = start_cur; |
| 1267 | res->len += 1; /* To restore the balance */ |
| 1268 | res->end = res->start + res->len - 1; |
| 1269 | return 0; |
| 1270 | } |
| 1271 | } |
| 1272 | |
| 1273 | if (!res_cur) { |
| 1274 | debug ("prev->rangeno = %d, noranges = %d\n", res_prev->rangeno, noranges); |
| 1275 | if (res_prev->rangeno < noranges) { |
| 1276 | /* if there're more ranges out there to check */ |
| 1277 | switch (res->type) { |
| 1278 | case IO: |
| 1279 | range = bus_cur->rangeIO; |
| 1280 | break; |
| 1281 | case MEM: |
| 1282 | range = bus_cur->rangeMem; |
| 1283 | break; |
| 1284 | case PFMEM: |
| 1285 | range = bus_cur->rangePFMem; |
| 1286 | break; |
| 1287 | } |
| 1288 | while (range) { |
Quentin Lambert | 79e50e7 | 2014-09-07 20:03:32 +0200 | [diff] [blame^] | 1289 | len_tmp = range->end - range->start; |
| 1290 | |
| 1291 | if (len_tmp >= res->len) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | if ((len_tmp < len_cur) || (len_cur == 0)) { |
| 1293 | if ((range->start % tmp_divide) == 0) { |
| 1294 | /* just perfect, starting address's divisible by length */ |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1295 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | len_cur = len_tmp; |
| 1297 | start_cur = range->start; |
| 1298 | } else { |
| 1299 | /* Needs adjusting */ |
| 1300 | tmp_start = range->start; |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1301 | flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | |
| 1303 | while ((len_tmp = range->end - tmp_start) >= res->len) { |
| 1304 | if ((tmp_start % tmp_divide) == 0) { |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1305 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | len_cur = len_tmp; |
| 1307 | start_cur = tmp_start; |
| 1308 | break; |
| 1309 | } |
| 1310 | tmp_start += tmp_divide - tmp_start % tmp_divide; |
| 1311 | if (tmp_start >= range->end) |
| 1312 | break; |
| 1313 | } |
| 1314 | } |
| 1315 | |
| 1316 | if (flag && len_cur == res->len) { |
| 1317 | res->start = start_cur; |
| 1318 | res->len += 1; /* To restore the balance */ |
| 1319 | res->end = res->start + res->len - 1; |
| 1320 | return 0; |
| 1321 | } |
| 1322 | } |
| 1323 | } |
| 1324 | range = range->next; |
| 1325 | } /* end of while */ |
| 1326 | |
| 1327 | if ((!range) && (len_cur == 0)) { |
| 1328 | /* have gone through the list of devices and ranges and haven't found n.e.thing */ |
| 1329 | err ("no appropriate range.. bailing out...\n"); |
| 1330 | return -EINVAL; |
| 1331 | } else if (len_cur) { |
| 1332 | res->start = start_cur; |
| 1333 | res->len += 1; /* To restore the balance */ |
| 1334 | res->end = res->start + res->len - 1; |
| 1335 | return 0; |
| 1336 | } |
| 1337 | } else { |
| 1338 | /* no more ranges to check on */ |
| 1339 | if (len_cur) { |
| 1340 | res->start = start_cur; |
| 1341 | res->len += 1; /* To restore the balance */ |
| 1342 | res->end = res->start + res->len - 1; |
| 1343 | return 0; |
| 1344 | } else { |
| 1345 | /* have gone through the list of devices and haven't found n.e.thing */ |
| 1346 | err ("no appropriate range.. bailing out...\n"); |
| 1347 | return -EINVAL; |
| 1348 | } |
| 1349 | } |
Quentin Lambert | 382a9c9 | 2014-09-07 20:02:04 +0200 | [diff] [blame] | 1350 | } /* end if (!res_cur) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | return -EINVAL; |
| 1352 | } |
| 1353 | |
| 1354 | /******************************************************************************** |
| 1355 | * This routine is called from remove_card if the card contained PPB. |
| 1356 | * It will remove all the resources on the bus as well as the bus itself |
| 1357 | * Input: Bus |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1358 | * Output: 0, -ENODEV |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | ********************************************************************************/ |
| 1360 | int ibmphp_remove_bus (struct bus_node *bus, u8 parent_busno) |
| 1361 | { |
| 1362 | struct resource_node *res_cur; |
| 1363 | struct resource_node *res_tmp; |
| 1364 | struct bus_node *prev_bus; |
| 1365 | int rc; |
| 1366 | |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1367 | prev_bus = find_bus_wprev (parent_busno, NULL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | |
| 1369 | if (!prev_bus) { |
| 1370 | debug ("something terribly wrong. Cannot find parent bus to the one to remove\n"); |
| 1371 | return -ENODEV; |
| 1372 | } |
| 1373 | |
| 1374 | debug ("In ibmphp_remove_bus... prev_bus->busno is %x\n", prev_bus->busno); |
| 1375 | |
| 1376 | rc = remove_ranges (bus, prev_bus); |
| 1377 | if (rc) |
| 1378 | return rc; |
| 1379 | |
| 1380 | if (bus->firstIO) { |
| 1381 | res_cur = bus->firstIO; |
| 1382 | while (res_cur) { |
| 1383 | res_tmp = res_cur; |
| 1384 | if (res_cur->next) |
| 1385 | res_cur = res_cur->next; |
| 1386 | else |
| 1387 | res_cur = res_cur->nextRange; |
| 1388 | kfree (res_tmp); |
| 1389 | res_tmp = NULL; |
| 1390 | } |
| 1391 | bus->firstIO = NULL; |
| 1392 | } |
| 1393 | if (bus->firstMem) { |
| 1394 | res_cur = bus->firstMem; |
| 1395 | while (res_cur) { |
| 1396 | res_tmp = res_cur; |
| 1397 | if (res_cur->next) |
| 1398 | res_cur = res_cur->next; |
| 1399 | else |
| 1400 | res_cur = res_cur->nextRange; |
| 1401 | kfree (res_tmp); |
| 1402 | res_tmp = NULL; |
| 1403 | } |
| 1404 | bus->firstMem = NULL; |
| 1405 | } |
| 1406 | if (bus->firstPFMem) { |
| 1407 | res_cur = bus->firstPFMem; |
| 1408 | while (res_cur) { |
| 1409 | res_tmp = res_cur; |
| 1410 | if (res_cur->next) |
| 1411 | res_cur = res_cur->next; |
| 1412 | else |
| 1413 | res_cur = res_cur->nextRange; |
| 1414 | kfree (res_tmp); |
| 1415 | res_tmp = NULL; |
| 1416 | } |
| 1417 | bus->firstPFMem = NULL; |
| 1418 | } |
| 1419 | |
| 1420 | if (bus->firstPFMemFromMem) { |
| 1421 | res_cur = bus->firstPFMemFromMem; |
| 1422 | while (res_cur) { |
| 1423 | res_tmp = res_cur; |
| 1424 | res_cur = res_cur->next; |
| 1425 | |
| 1426 | kfree (res_tmp); |
| 1427 | res_tmp = NULL; |
| 1428 | } |
| 1429 | bus->firstPFMemFromMem = NULL; |
| 1430 | } |
| 1431 | |
| 1432 | list_del (&bus->bus_list); |
| 1433 | kfree (bus); |
| 1434 | return 0; |
| 1435 | } |
| 1436 | |
| 1437 | /****************************************************************************** |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1438 | * This routine deletes the ranges from a given bus, and the entries from the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | * parent's bus in the resources |
| 1440 | * Input: current bus, previous bus |
| 1441 | * Output: 0, -EINVAL |
| 1442 | ******************************************************************************/ |
| 1443 | static int remove_ranges (struct bus_node *bus_cur, struct bus_node *bus_prev) |
| 1444 | { |
| 1445 | struct range_node *range_cur; |
| 1446 | struct range_node *range_tmp; |
| 1447 | int i; |
| 1448 | struct resource_node *res = NULL; |
| 1449 | |
| 1450 | if (bus_cur->noIORanges) { |
| 1451 | range_cur = bus_cur->rangeIO; |
| 1452 | for (i = 0; i < bus_cur->noIORanges; i++) { |
| 1453 | if (ibmphp_find_resource (bus_prev, range_cur->start, &res, IO) < 0) |
| 1454 | return -EINVAL; |
| 1455 | ibmphp_remove_resource (res); |
| 1456 | |
| 1457 | range_tmp = range_cur; |
| 1458 | range_cur = range_cur->next; |
| 1459 | kfree (range_tmp); |
| 1460 | range_tmp = NULL; |
| 1461 | } |
| 1462 | bus_cur->rangeIO = NULL; |
| 1463 | } |
| 1464 | if (bus_cur->noMemRanges) { |
| 1465 | range_cur = bus_cur->rangeMem; |
| 1466 | for (i = 0; i < bus_cur->noMemRanges; i++) { |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1467 | if (ibmphp_find_resource (bus_prev, range_cur->start, &res, MEM) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1468 | return -EINVAL; |
| 1469 | |
| 1470 | ibmphp_remove_resource (res); |
| 1471 | range_tmp = range_cur; |
| 1472 | range_cur = range_cur->next; |
| 1473 | kfree (range_tmp); |
| 1474 | range_tmp = NULL; |
| 1475 | } |
| 1476 | bus_cur->rangeMem = NULL; |
| 1477 | } |
| 1478 | if (bus_cur->noPFMemRanges) { |
| 1479 | range_cur = bus_cur->rangePFMem; |
| 1480 | for (i = 0; i < bus_cur->noPFMemRanges; i++) { |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1481 | if (ibmphp_find_resource (bus_prev, range_cur->start, &res, PFMEM) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | return -EINVAL; |
| 1483 | |
| 1484 | ibmphp_remove_resource (res); |
| 1485 | range_tmp = range_cur; |
| 1486 | range_cur = range_cur->next; |
| 1487 | kfree (range_tmp); |
| 1488 | range_tmp = NULL; |
| 1489 | } |
| 1490 | bus_cur->rangePFMem = NULL; |
| 1491 | } |
| 1492 | return 0; |
| 1493 | } |
| 1494 | |
| 1495 | /* |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1496 | * find the resource node in the bus |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | * Input: Resource needed, start address of the resource, type of resource |
| 1498 | */ |
| 1499 | int ibmphp_find_resource (struct bus_node *bus, u32 start_address, struct resource_node **res, int flag) |
| 1500 | { |
| 1501 | struct resource_node *res_cur = NULL; |
| 1502 | char * type = ""; |
| 1503 | |
| 1504 | if (!bus) { |
| 1505 | err ("The bus passed in NULL to find resource\n"); |
| 1506 | return -ENODEV; |
| 1507 | } |
| 1508 | |
| 1509 | switch (flag) { |
| 1510 | case IO: |
| 1511 | res_cur = bus->firstIO; |
| 1512 | type = "io"; |
| 1513 | break; |
| 1514 | case MEM: |
| 1515 | res_cur = bus->firstMem; |
| 1516 | type = "mem"; |
| 1517 | break; |
| 1518 | case PFMEM: |
| 1519 | res_cur = bus->firstPFMem; |
| 1520 | type = "pfmem"; |
| 1521 | break; |
| 1522 | default: |
| 1523 | err ("wrong type of flag\n"); |
| 1524 | return -EINVAL; |
| 1525 | } |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1526 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1527 | while (res_cur) { |
| 1528 | if (res_cur->start == start_address) { |
| 1529 | *res = res_cur; |
| 1530 | break; |
| 1531 | } |
| 1532 | if (res_cur->next) |
| 1533 | res_cur = res_cur->next; |
| 1534 | else |
| 1535 | res_cur = res_cur->nextRange; |
| 1536 | } |
| 1537 | |
| 1538 | if (!res_cur) { |
| 1539 | if (flag == PFMEM) { |
| 1540 | res_cur = bus->firstPFMemFromMem; |
| 1541 | while (res_cur) { |
| 1542 | if (res_cur->start == start_address) { |
| 1543 | *res = res_cur; |
| 1544 | break; |
| 1545 | } |
| 1546 | res_cur = res_cur->next; |
| 1547 | } |
| 1548 | if (!res_cur) { |
| 1549 | debug ("SOS...cannot find %s resource in the bus.\n", type); |
| 1550 | return -EINVAL; |
| 1551 | } |
| 1552 | } else { |
| 1553 | debug ("SOS... cannot find %s resource in the bus.\n", type); |
| 1554 | return -EINVAL; |
| 1555 | } |
| 1556 | } |
| 1557 | |
| 1558 | if (*res) |
| 1559 | debug ("*res->start = %x\n", (*res)->start); |
| 1560 | |
| 1561 | return 0; |
| 1562 | } |
| 1563 | |
| 1564 | /*********************************************************************** |
| 1565 | * This routine will free the resource structures used by the |
| 1566 | * system. It is called from cleanup routine for the module |
| 1567 | * Parameters: none |
| 1568 | * Returns: none |
| 1569 | ***********************************************************************/ |
| 1570 | void ibmphp_free_resources (void) |
| 1571 | { |
| 1572 | struct bus_node *bus_cur = NULL; |
| 1573 | struct bus_node *bus_tmp; |
| 1574 | struct range_node *range_cur; |
| 1575 | struct range_node *range_tmp; |
| 1576 | struct resource_node *res_cur; |
| 1577 | struct resource_node *res_tmp; |
| 1578 | struct list_head *tmp; |
| 1579 | struct list_head *next; |
| 1580 | int i = 0; |
| 1581 | flags = 1; |
| 1582 | |
| 1583 | list_for_each_safe (tmp, next, &gbuses) { |
| 1584 | bus_cur = list_entry (tmp, struct bus_node, bus_list); |
| 1585 | if (bus_cur->noIORanges) { |
| 1586 | range_cur = bus_cur->rangeIO; |
| 1587 | for (i = 0; i < bus_cur->noIORanges; i++) { |
| 1588 | if (!range_cur) |
| 1589 | break; |
| 1590 | range_tmp = range_cur; |
| 1591 | range_cur = range_cur->next; |
| 1592 | kfree (range_tmp); |
| 1593 | range_tmp = NULL; |
| 1594 | } |
| 1595 | } |
| 1596 | if (bus_cur->noMemRanges) { |
| 1597 | range_cur = bus_cur->rangeMem; |
| 1598 | for (i = 0; i < bus_cur->noMemRanges; i++) { |
| 1599 | if (!range_cur) |
| 1600 | break; |
| 1601 | range_tmp = range_cur; |
| 1602 | range_cur = range_cur->next; |
| 1603 | kfree (range_tmp); |
| 1604 | range_tmp = NULL; |
| 1605 | } |
| 1606 | } |
| 1607 | if (bus_cur->noPFMemRanges) { |
| 1608 | range_cur = bus_cur->rangePFMem; |
| 1609 | for (i = 0; i < bus_cur->noPFMemRanges; i++) { |
| 1610 | if (!range_cur) |
| 1611 | break; |
| 1612 | range_tmp = range_cur; |
| 1613 | range_cur = range_cur->next; |
| 1614 | kfree (range_tmp); |
| 1615 | range_tmp = NULL; |
| 1616 | } |
| 1617 | } |
| 1618 | |
| 1619 | if (bus_cur->firstIO) { |
| 1620 | res_cur = bus_cur->firstIO; |
| 1621 | while (res_cur) { |
| 1622 | res_tmp = res_cur; |
| 1623 | if (res_cur->next) |
| 1624 | res_cur = res_cur->next; |
| 1625 | else |
| 1626 | res_cur = res_cur->nextRange; |
| 1627 | kfree (res_tmp); |
| 1628 | res_tmp = NULL; |
| 1629 | } |
| 1630 | bus_cur->firstIO = NULL; |
| 1631 | } |
| 1632 | if (bus_cur->firstMem) { |
| 1633 | res_cur = bus_cur->firstMem; |
| 1634 | while (res_cur) { |
| 1635 | res_tmp = res_cur; |
| 1636 | if (res_cur->next) |
| 1637 | res_cur = res_cur->next; |
| 1638 | else |
| 1639 | res_cur = res_cur->nextRange; |
| 1640 | kfree (res_tmp); |
| 1641 | res_tmp = NULL; |
| 1642 | } |
| 1643 | bus_cur->firstMem = NULL; |
| 1644 | } |
| 1645 | if (bus_cur->firstPFMem) { |
| 1646 | res_cur = bus_cur->firstPFMem; |
| 1647 | while (res_cur) { |
| 1648 | res_tmp = res_cur; |
| 1649 | if (res_cur->next) |
| 1650 | res_cur = res_cur->next; |
| 1651 | else |
| 1652 | res_cur = res_cur->nextRange; |
| 1653 | kfree (res_tmp); |
| 1654 | res_tmp = NULL; |
| 1655 | } |
| 1656 | bus_cur->firstPFMem = NULL; |
| 1657 | } |
| 1658 | |
| 1659 | if (bus_cur->firstPFMemFromMem) { |
| 1660 | res_cur = bus_cur->firstPFMemFromMem; |
| 1661 | while (res_cur) { |
| 1662 | res_tmp = res_cur; |
| 1663 | res_cur = res_cur->next; |
| 1664 | |
| 1665 | kfree (res_tmp); |
| 1666 | res_tmp = NULL; |
| 1667 | } |
| 1668 | bus_cur->firstPFMemFromMem = NULL; |
| 1669 | } |
| 1670 | |
| 1671 | bus_tmp = bus_cur; |
| 1672 | list_del (&bus_cur->bus_list); |
| 1673 | kfree (bus_tmp); |
| 1674 | bus_tmp = NULL; |
| 1675 | } |
| 1676 | } |
| 1677 | |
| 1678 | /********************************************************************************* |
| 1679 | * This function will go over the PFmem resources to check if the EBDA allocated |
| 1680 | * pfmem out of memory buckets of the bus. If so, it will change the range numbers |
| 1681 | * and a flag to indicate that this resource is out of memory. It will also move the |
| 1682 | * Pfmem out of the pfmem resource list to the PFMemFromMem list, and will create |
| 1683 | * a new Mem node |
| 1684 | * This routine is called right after initialization |
| 1685 | *******************************************************************************/ |
| 1686 | static int __init once_over (void) |
| 1687 | { |
| 1688 | struct resource_node *pfmem_cur; |
| 1689 | struct resource_node *pfmem_prev; |
| 1690 | struct resource_node *mem; |
| 1691 | struct bus_node *bus_cur; |
| 1692 | struct list_head *tmp; |
| 1693 | |
| 1694 | list_for_each (tmp, &gbuses) { |
| 1695 | bus_cur = list_entry (tmp, struct bus_node, bus_list); |
| 1696 | if ((!bus_cur->rangePFMem) && (bus_cur->firstPFMem)) { |
| 1697 | for (pfmem_cur = bus_cur->firstPFMem, pfmem_prev = NULL; pfmem_cur; pfmem_prev = pfmem_cur, pfmem_cur = pfmem_cur->next) { |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1698 | pfmem_cur->fromMem = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1699 | if (pfmem_prev) |
| 1700 | pfmem_prev->next = pfmem_cur->next; |
| 1701 | else |
| 1702 | bus_cur->firstPFMem = pfmem_cur->next; |
| 1703 | |
| 1704 | if (!bus_cur->firstPFMemFromMem) |
| 1705 | pfmem_cur->next = NULL; |
| 1706 | else |
| 1707 | /* we don't need to sort PFMemFromMem since we're using mem node for |
| 1708 | all the real work anyways, so just insert at the beginning of the |
| 1709 | list |
| 1710 | */ |
| 1711 | pfmem_cur->next = bus_cur->firstPFMemFromMem; |
| 1712 | |
| 1713 | bus_cur->firstPFMemFromMem = pfmem_cur; |
| 1714 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 1715 | mem = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1716 | if (!mem) { |
| 1717 | err ("out of system memory\n"); |
| 1718 | return -ENOMEM; |
| 1719 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1720 | mem->type = MEM; |
| 1721 | mem->busno = pfmem_cur->busno; |
| 1722 | mem->devfunc = pfmem_cur->devfunc; |
| 1723 | mem->start = pfmem_cur->start; |
| 1724 | mem->end = pfmem_cur->end; |
| 1725 | mem->len = pfmem_cur->len; |
| 1726 | if (ibmphp_add_resource (mem) < 0) |
| 1727 | err ("Trouble...trouble... EBDA allocated pfmem from mem, but system doesn't display it has this space... unless not PCI device...\n"); |
| 1728 | pfmem_cur->rangeno = mem->rangeno; |
| 1729 | } /* end for pfmem */ |
| 1730 | } /* end if */ |
| 1731 | } /* end list_for_each bus */ |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1732 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1733 | } |
| 1734 | |
| 1735 | int ibmphp_add_pfmem_from_mem (struct resource_node *pfmem) |
| 1736 | { |
| 1737 | struct bus_node *bus_cur = find_bus_wprev (pfmem->busno, NULL, 0); |
| 1738 | |
| 1739 | if (!bus_cur) { |
| 1740 | err ("cannot find bus of pfmem to add...\n"); |
| 1741 | return -ENODEV; |
| 1742 | } |
| 1743 | |
| 1744 | if (bus_cur->firstPFMemFromMem) |
| 1745 | pfmem->next = bus_cur->firstPFMemFromMem; |
| 1746 | else |
| 1747 | pfmem->next = NULL; |
| 1748 | |
| 1749 | bus_cur->firstPFMemFromMem = pfmem; |
| 1750 | |
| 1751 | return 0; |
| 1752 | } |
| 1753 | |
| 1754 | /* This routine just goes through the buses to see if the bus already exists. |
| 1755 | * It is called from ibmphp_find_sec_number, to find out a secondary bus number for |
| 1756 | * bridged cards |
| 1757 | * Parameters: bus_number |
| 1758 | * Returns: Bus pointer or NULL |
| 1759 | */ |
| 1760 | struct bus_node *ibmphp_find_res_bus (u8 bus_number) |
| 1761 | { |
| 1762 | return find_bus_wprev (bus_number, NULL, 0); |
| 1763 | } |
| 1764 | |
| 1765 | static struct bus_node *find_bus_wprev (u8 bus_number, struct bus_node **prev, u8 flag) |
| 1766 | { |
| 1767 | struct bus_node *bus_cur; |
| 1768 | struct list_head *tmp; |
| 1769 | struct list_head *tmp_prev; |
| 1770 | |
| 1771 | list_for_each (tmp, &gbuses) { |
| 1772 | tmp_prev = tmp->prev; |
| 1773 | bus_cur = list_entry (tmp, struct bus_node, bus_list); |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1774 | if (flag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1775 | *prev = list_entry (tmp_prev, struct bus_node, bus_list); |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1776 | if (bus_cur->busno == bus_number) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1777 | return bus_cur; |
| 1778 | } |
| 1779 | |
| 1780 | return NULL; |
| 1781 | } |
| 1782 | |
| 1783 | void ibmphp_print_test (void) |
| 1784 | { |
| 1785 | int i = 0; |
| 1786 | struct bus_node *bus_cur = NULL; |
| 1787 | struct range_node *range; |
| 1788 | struct resource_node *res; |
| 1789 | struct list_head *tmp; |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1790 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1791 | debug_pci ("*****************START**********************\n"); |
| 1792 | |
| 1793 | if ((!list_empty(&gbuses)) && flags) { |
| 1794 | err ("The GBUSES is not NULL?!?!?!?!?\n"); |
| 1795 | return; |
| 1796 | } |
| 1797 | |
| 1798 | list_for_each (tmp, &gbuses) { |
| 1799 | bus_cur = list_entry (tmp, struct bus_node, bus_list); |
| 1800 | debug_pci ("This is bus # %d. There are\n", bus_cur->busno); |
| 1801 | debug_pci ("IORanges = %d\t", bus_cur->noIORanges); |
| 1802 | debug_pci ("MemRanges = %d\t", bus_cur->noMemRanges); |
| 1803 | debug_pci ("PFMemRanges = %d\n", bus_cur->noPFMemRanges); |
| 1804 | debug_pci ("The IO Ranges are as follows:\n"); |
| 1805 | if (bus_cur->rangeIO) { |
| 1806 | range = bus_cur->rangeIO; |
| 1807 | for (i = 0; i < bus_cur->noIORanges; i++) { |
| 1808 | debug_pci ("rangeno is %d\n", range->rangeno); |
| 1809 | debug_pci ("[%x - %x]\n", range->start, range->end); |
| 1810 | range = range->next; |
| 1811 | } |
| 1812 | } |
| 1813 | |
| 1814 | debug_pci ("The Mem Ranges are as follows:\n"); |
| 1815 | if (bus_cur->rangeMem) { |
| 1816 | range = bus_cur->rangeMem; |
| 1817 | for (i = 0; i < bus_cur->noMemRanges; i++) { |
| 1818 | debug_pci ("rangeno is %d\n", range->rangeno); |
| 1819 | debug_pci ("[%x - %x]\n", range->start, range->end); |
| 1820 | range = range->next; |
| 1821 | } |
| 1822 | } |
| 1823 | |
| 1824 | debug_pci ("The PFMem Ranges are as follows:\n"); |
| 1825 | |
| 1826 | if (bus_cur->rangePFMem) { |
| 1827 | range = bus_cur->rangePFMem; |
| 1828 | for (i = 0; i < bus_cur->noPFMemRanges; i++) { |
| 1829 | debug_pci ("rangeno is %d\n", range->rangeno); |
| 1830 | debug_pci ("[%x - %x]\n", range->start, range->end); |
| 1831 | range = range->next; |
| 1832 | } |
| 1833 | } |
| 1834 | |
| 1835 | debug_pci ("The resources on this bus are as follows\n"); |
| 1836 | |
| 1837 | debug_pci ("IO...\n"); |
| 1838 | if (bus_cur->firstIO) { |
| 1839 | res = bus_cur->firstIO; |
| 1840 | while (res) { |
| 1841 | debug_pci ("The range # is %d\n", res->rangeno); |
| 1842 | debug_pci ("The bus, devfnc is %d, %x\n", res->busno, res->devfunc); |
| 1843 | debug_pci ("[%x - %x], len=%x\n", res->start, res->end, res->len); |
| 1844 | if (res->next) |
| 1845 | res = res->next; |
| 1846 | else if (res->nextRange) |
| 1847 | res = res->nextRange; |
| 1848 | else |
| 1849 | break; |
| 1850 | } |
| 1851 | } |
| 1852 | debug_pci ("Mem...\n"); |
| 1853 | if (bus_cur->firstMem) { |
| 1854 | res = bus_cur->firstMem; |
| 1855 | while (res) { |
| 1856 | debug_pci ("The range # is %d\n", res->rangeno); |
| 1857 | debug_pci ("The bus, devfnc is %d, %x\n", res->busno, res->devfunc); |
| 1858 | debug_pci ("[%x - %x], len=%x\n", res->start, res->end, res->len); |
| 1859 | if (res->next) |
| 1860 | res = res->next; |
| 1861 | else if (res->nextRange) |
| 1862 | res = res->nextRange; |
| 1863 | else |
| 1864 | break; |
| 1865 | } |
| 1866 | } |
| 1867 | debug_pci ("PFMem...\n"); |
| 1868 | if (bus_cur->firstPFMem) { |
| 1869 | res = bus_cur->firstPFMem; |
| 1870 | while (res) { |
| 1871 | debug_pci ("The range # is %d\n", res->rangeno); |
| 1872 | debug_pci ("The bus, devfnc is %d, %x\n", res->busno, res->devfunc); |
| 1873 | debug_pci ("[%x - %x], len=%x\n", res->start, res->end, res->len); |
| 1874 | if (res->next) |
| 1875 | res = res->next; |
| 1876 | else if (res->nextRange) |
| 1877 | res = res->nextRange; |
| 1878 | else |
| 1879 | break; |
| 1880 | } |
| 1881 | } |
| 1882 | |
| 1883 | debug_pci ("PFMemFromMem...\n"); |
| 1884 | if (bus_cur->firstPFMemFromMem) { |
| 1885 | res = bus_cur->firstPFMemFromMem; |
| 1886 | while (res) { |
| 1887 | debug_pci ("The range # is %d\n", res->rangeno); |
| 1888 | debug_pci ("The bus, devfnc is %d, %x\n", res->busno, res->devfunc); |
| 1889 | debug_pci ("[%x - %x], len=%x\n", res->start, res->end, res->len); |
| 1890 | res = res->next; |
| 1891 | } |
| 1892 | } |
| 1893 | } |
| 1894 | debug_pci ("***********************END***********************\n"); |
| 1895 | } |
| 1896 | |
| 1897 | static int range_exists_already (struct range_node * range, struct bus_node * bus_cur, u8 type) |
| 1898 | { |
| 1899 | struct range_node * range_cur = NULL; |
| 1900 | switch (type) { |
| 1901 | case IO: |
| 1902 | range_cur = bus_cur->rangeIO; |
| 1903 | break; |
| 1904 | case MEM: |
| 1905 | range_cur = bus_cur->rangeMem; |
| 1906 | break; |
| 1907 | case PFMEM: |
| 1908 | range_cur = bus_cur->rangePFMem; |
| 1909 | break; |
| 1910 | default: |
| 1911 | err ("wrong type passed to find out if range already exists\n"); |
| 1912 | return -ENODEV; |
| 1913 | } |
| 1914 | |
| 1915 | while (range_cur) { |
| 1916 | if ((range_cur->start == range->start) && (range_cur->end == range->end)) |
| 1917 | return 1; |
| 1918 | range_cur = range_cur->next; |
| 1919 | } |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1920 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1921 | return 0; |
| 1922 | } |
| 1923 | |
| 1924 | /* This routine will read the windows for any PPB we have and update the |
| 1925 | * range info for the secondary bus, and will also input this info into |
| 1926 | * primary bus, since BIOS doesn't. This is for PPB that are in the system |
| 1927 | * on bootup. For bridged cards that were added during previous load of the |
| 1928 | * driver, only the ranges and the bus structure are added, the devices are |
| 1929 | * added from NVRAM |
| 1930 | * Input: primary busno |
| 1931 | * Returns: none |
| 1932 | * Note: this function doesn't take into account IO restrictions etc, |
| 1933 | * so will only work for bridges with no video/ISA devices behind them It |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1934 | * also will not work for onboard PPBs that can have more than 1 *bus |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1935 | * behind them All these are TO DO. |
| 1936 | * Also need to add more error checkings... (from fnc returns etc) |
| 1937 | */ |
| 1938 | static int __init update_bridge_ranges (struct bus_node **bus) |
| 1939 | { |
| 1940 | u8 sec_busno, device, function, hdr_type, start_io_address, end_io_address; |
| 1941 | u16 vendor_id, upper_io_start, upper_io_end, start_mem_address, end_mem_address; |
| 1942 | u32 start_address, end_address, upper_start, upper_end; |
| 1943 | struct bus_node *bus_sec; |
| 1944 | struct bus_node *bus_cur; |
| 1945 | struct resource_node *io; |
| 1946 | struct resource_node *mem; |
| 1947 | struct resource_node *pfmem; |
| 1948 | struct range_node *range; |
| 1949 | unsigned int devfn; |
| 1950 | |
| 1951 | bus_cur = *bus; |
| 1952 | if (!bus_cur) |
| 1953 | return -ENODEV; |
| 1954 | ibmphp_pci_bus->number = bus_cur->busno; |
| 1955 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 1956 | debug ("inside %s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1957 | debug ("bus_cur->busno = %x\n", bus_cur->busno); |
| 1958 | |
| 1959 | for (device = 0; device < 32; device++) { |
| 1960 | for (function = 0x00; function < 0x08; function++) { |
| 1961 | devfn = PCI_DEVFN(device, function); |
| 1962 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_VENDOR_ID, &vendor_id); |
| 1963 | |
| 1964 | if (vendor_id != PCI_VENDOR_ID_NOTVALID) { |
| 1965 | /* found correct device!!! */ |
| 1966 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_HEADER_TYPE, &hdr_type); |
| 1967 | |
| 1968 | switch (hdr_type) { |
| 1969 | case PCI_HEADER_TYPE_NORMAL: |
| 1970 | function = 0x8; |
| 1971 | break; |
| 1972 | case PCI_HEADER_TYPE_MULTIDEVICE: |
| 1973 | break; |
| 1974 | case PCI_HEADER_TYPE_BRIDGE: |
| 1975 | function = 0x8; |
| 1976 | case PCI_HEADER_TYPE_MULTIBRIDGE: |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1977 | /* We assume here that only 1 bus behind the bridge |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1978 | TO DO: add functionality for several: |
| 1979 | temp = secondary; |
| 1980 | while (temp < subordinate) { |
| 1981 | ... |
| 1982 | temp++; |
| 1983 | } |
| 1984 | */ |
| 1985 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_SECONDARY_BUS, &sec_busno); |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1986 | bus_sec = find_bus_wprev (sec_busno, NULL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1987 | /* this bus structure doesn't exist yet, PPB was configured during previous loading of ibmphp */ |
| 1988 | if (!bus_sec) { |
| 1989 | bus_sec = alloc_error_bus (NULL, sec_busno, 1); |
| 1990 | /* the rest will be populated during NVRAM call */ |
| 1991 | return 0; |
| 1992 | } |
| 1993 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_IO_BASE, &start_io_address); |
| 1994 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_IO_LIMIT, &end_io_address); |
| 1995 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_IO_BASE_UPPER16, &upper_io_start); |
| 1996 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_IO_LIMIT_UPPER16, &upper_io_end); |
| 1997 | start_address = (start_io_address & PCI_IO_RANGE_MASK) << 8; |
| 1998 | start_address |= (upper_io_start << 16); |
| 1999 | end_address = (end_io_address & PCI_IO_RANGE_MASK) << 8; |
| 2000 | end_address |= (upper_io_end << 16); |
| 2001 | |
| 2002 | if ((start_address) && (start_address <= end_address)) { |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 2003 | range = kzalloc(sizeof(struct range_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2004 | if (!range) { |
| 2005 | err ("out of system memory\n"); |
| 2006 | return -ENOMEM; |
| 2007 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2008 | range->start = start_address; |
| 2009 | range->end = end_address + 0xfff; |
| 2010 | |
| 2011 | if (bus_sec->noIORanges > 0) { |
| 2012 | if (!range_exists_already (range, bus_sec, IO)) { |
H. Peter Anvin | c85e4aa | 2010-02-10 17:45:09 -0800 | [diff] [blame] | 2013 | add_bus_range (IO, range, bus_sec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2014 | ++bus_sec->noIORanges; |
| 2015 | } else { |
| 2016 | kfree (range); |
| 2017 | range = NULL; |
| 2018 | } |
| 2019 | } else { |
| 2020 | /* 1st IO Range on the bus */ |
| 2021 | range->rangeno = 1; |
| 2022 | bus_sec->rangeIO = range; |
| 2023 | ++bus_sec->noIORanges; |
| 2024 | } |
| 2025 | fix_resources (bus_sec); |
| 2026 | |
| 2027 | if (ibmphp_find_resource (bus_cur, start_address, &io, IO)) { |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 2028 | io = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | if (!io) { |
| 2030 | kfree (range); |
| 2031 | err ("out of system memory\n"); |
| 2032 | return -ENOMEM; |
| 2033 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2034 | io->type = IO; |
| 2035 | io->busno = bus_cur->busno; |
| 2036 | io->devfunc = ((device << 3) | (function & 0x7)); |
| 2037 | io->start = start_address; |
| 2038 | io->end = end_address + 0xfff; |
| 2039 | io->len = io->end - io->start + 1; |
| 2040 | ibmphp_add_resource (io); |
| 2041 | } |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 2042 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2043 | |
| 2044 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_MEMORY_BASE, &start_mem_address); |
| 2045 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_MEMORY_LIMIT, &end_mem_address); |
| 2046 | |
| 2047 | start_address = 0x00000000 | (start_mem_address & PCI_MEMORY_RANGE_MASK) << 16; |
| 2048 | end_address = 0x00000000 | (end_mem_address & PCI_MEMORY_RANGE_MASK) << 16; |
| 2049 | |
| 2050 | if ((start_address) && (start_address <= end_address)) { |
| 2051 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 2052 | range = kzalloc(sizeof(struct range_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2053 | if (!range) { |
| 2054 | err ("out of system memory\n"); |
| 2055 | return -ENOMEM; |
| 2056 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2057 | range->start = start_address; |
| 2058 | range->end = end_address + 0xfffff; |
| 2059 | |
| 2060 | if (bus_sec->noMemRanges > 0) { |
| 2061 | if (!range_exists_already (range, bus_sec, MEM)) { |
H. Peter Anvin | c85e4aa | 2010-02-10 17:45:09 -0800 | [diff] [blame] | 2062 | add_bus_range (MEM, range, bus_sec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2063 | ++bus_sec->noMemRanges; |
| 2064 | } else { |
| 2065 | kfree (range); |
| 2066 | range = NULL; |
| 2067 | } |
| 2068 | } else { |
| 2069 | /* 1st Mem Range on the bus */ |
| 2070 | range->rangeno = 1; |
| 2071 | bus_sec->rangeMem = range; |
| 2072 | ++bus_sec->noMemRanges; |
| 2073 | } |
| 2074 | |
| 2075 | fix_resources (bus_sec); |
| 2076 | |
| 2077 | if (ibmphp_find_resource (bus_cur, start_address, &mem, MEM)) { |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 2078 | mem = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2079 | if (!mem) { |
| 2080 | kfree (range); |
| 2081 | err ("out of system memory\n"); |
| 2082 | return -ENOMEM; |
| 2083 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2084 | mem->type = MEM; |
| 2085 | mem->busno = bus_cur->busno; |
| 2086 | mem->devfunc = ((device << 3) | (function & 0x7)); |
| 2087 | mem->start = start_address; |
| 2088 | mem->end = end_address + 0xfffff; |
| 2089 | mem->len = mem->end - mem->start + 1; |
| 2090 | ibmphp_add_resource (mem); |
| 2091 | } |
| 2092 | } |
| 2093 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_BASE, &start_mem_address); |
| 2094 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, &end_mem_address); |
| 2095 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, PCI_PREF_BASE_UPPER32, &upper_start); |
| 2096 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, PCI_PREF_LIMIT_UPPER32, &upper_end); |
| 2097 | start_address = 0x00000000 | (start_mem_address & PCI_MEMORY_RANGE_MASK) << 16; |
| 2098 | end_address = 0x00000000 | (end_mem_address & PCI_MEMORY_RANGE_MASK) << 16; |
| 2099 | #if BITS_PER_LONG == 64 |
| 2100 | start_address |= ((long) upper_start) << 32; |
| 2101 | end_address |= ((long) upper_end) << 32; |
| 2102 | #endif |
| 2103 | |
| 2104 | if ((start_address) && (start_address <= end_address)) { |
| 2105 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 2106 | range = kzalloc(sizeof(struct range_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2107 | if (!range) { |
| 2108 | err ("out of system memory\n"); |
| 2109 | return -ENOMEM; |
| 2110 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2111 | range->start = start_address; |
| 2112 | range->end = end_address + 0xfffff; |
| 2113 | |
| 2114 | if (bus_sec->noPFMemRanges > 0) { |
| 2115 | if (!range_exists_already (range, bus_sec, PFMEM)) { |
H. Peter Anvin | c85e4aa | 2010-02-10 17:45:09 -0800 | [diff] [blame] | 2116 | add_bus_range (PFMEM, range, bus_sec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2117 | ++bus_sec->noPFMemRanges; |
| 2118 | } else { |
| 2119 | kfree (range); |
| 2120 | range = NULL; |
| 2121 | } |
| 2122 | } else { |
| 2123 | /* 1st PFMem Range on the bus */ |
| 2124 | range->rangeno = 1; |
| 2125 | bus_sec->rangePFMem = range; |
| 2126 | ++bus_sec->noPFMemRanges; |
| 2127 | } |
| 2128 | |
| 2129 | fix_resources (bus_sec); |
| 2130 | if (ibmphp_find_resource (bus_cur, start_address, &pfmem, PFMEM)) { |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 2131 | pfmem = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2132 | if (!pfmem) { |
| 2133 | kfree (range); |
| 2134 | err ("out of system memory\n"); |
| 2135 | return -ENOMEM; |
| 2136 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2137 | pfmem->type = PFMEM; |
| 2138 | pfmem->busno = bus_cur->busno; |
| 2139 | pfmem->devfunc = ((device << 3) | (function & 0x7)); |
| 2140 | pfmem->start = start_address; |
| 2141 | pfmem->end = end_address + 0xfffff; |
| 2142 | pfmem->len = pfmem->end - pfmem->start + 1; |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 2143 | pfmem->fromMem = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2144 | |
| 2145 | ibmphp_add_resource (pfmem); |
| 2146 | } |
| 2147 | } |
| 2148 | break; |
| 2149 | } /* end of switch */ |
| 2150 | } /* end if vendor */ |
| 2151 | } /* end for function */ |
| 2152 | } /* end for device */ |
| 2153 | |
| 2154 | bus = &bus_cur; |
| 2155 | return 0; |
| 2156 | } |