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 | } |
Quentin Lambert | 754834b | 2014-11-06 17:45:55 +0100 | [diff] [blame^] | 379 | return once_over (); /* This is to align ranges (so no -1) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | } |
| 381 | |
| 382 | /******************************************************************************** |
| 383 | * This function adds a range into a sorted list of ranges per bus for a particular |
| 384 | * range type, it then calls another routine to update the range numbers on the |
| 385 | * pci devices' resources for the appropriate resource |
| 386 | * |
| 387 | * Input: type of the resource, range to add, current bus |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 388 | * Output: 0 or -1, bus and range ptrs |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | ********************************************************************************/ |
H. Peter Anvin | c85e4aa | 2010-02-10 17:45:09 -0800 | [diff] [blame] | 390 | 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] | 391 | { |
| 392 | struct range_node *range_cur = NULL; |
| 393 | struct range_node *range_prev; |
| 394 | int count = 0, i_init; |
| 395 | int noRanges = 0; |
| 396 | |
| 397 | switch (type) { |
| 398 | case MEM: |
| 399 | range_cur = bus_cur->rangeMem; |
| 400 | noRanges = bus_cur->noMemRanges; |
| 401 | break; |
| 402 | case PFMEM: |
| 403 | range_cur = bus_cur->rangePFMem; |
| 404 | noRanges = bus_cur->noPFMemRanges; |
| 405 | break; |
| 406 | case IO: |
| 407 | range_cur = bus_cur->rangeIO; |
| 408 | noRanges = bus_cur->noIORanges; |
| 409 | break; |
| 410 | } |
| 411 | |
| 412 | range_prev = NULL; |
| 413 | while (range_cur) { |
| 414 | if (range->start < range_cur->start) |
| 415 | break; |
| 416 | range_prev = range_cur; |
| 417 | range_cur = range_cur->next; |
| 418 | count = count + 1; |
| 419 | } |
| 420 | if (!count) { |
| 421 | /* our range will go at the beginning of the list */ |
| 422 | switch (type) { |
| 423 | case MEM: |
| 424 | bus_cur->rangeMem = range; |
| 425 | break; |
| 426 | case PFMEM: |
| 427 | bus_cur->rangePFMem = range; |
| 428 | break; |
| 429 | case IO: |
| 430 | bus_cur->rangeIO = range; |
| 431 | break; |
| 432 | } |
| 433 | range->next = range_cur; |
| 434 | range->rangeno = 1; |
| 435 | i_init = 0; |
| 436 | } else if (!range_cur) { |
| 437 | /* our range will go at the end of the list */ |
| 438 | range->next = NULL; |
| 439 | range_prev->next = range; |
| 440 | range->rangeno = range_prev->rangeno + 1; |
| 441 | return 0; |
| 442 | } else { |
| 443 | /* the range is in the middle */ |
| 444 | range_prev->next = range; |
| 445 | range->next = range_cur; |
| 446 | range->rangeno = range_cur->rangeno; |
| 447 | i_init = range_prev->rangeno; |
| 448 | } |
| 449 | |
| 450 | for (count = i_init; count < noRanges; ++count) { |
| 451 | ++range_cur->rangeno; |
| 452 | range_cur = range_cur->next; |
| 453 | } |
| 454 | |
| 455 | update_resources (bus_cur, type, i_init + 1); |
| 456 | return 0; |
| 457 | } |
| 458 | |
| 459 | /******************************************************************************* |
| 460 | * 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] | 461 | * 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] | 462 | * |
| 463 | * Input: bus, type of the resource, the rangeno starting from which to update |
| 464 | ******************************************************************************/ |
| 465 | static void update_resources (struct bus_node *bus_cur, int type, int rangeno) |
| 466 | { |
| 467 | struct resource_node *res = NULL; |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 468 | u8 eol = 0; /* end of list indicator */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | |
| 470 | switch (type) { |
| 471 | case MEM: |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 472 | if (bus_cur->firstMem) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | res = bus_cur->firstMem; |
| 474 | break; |
| 475 | case PFMEM: |
| 476 | if (bus_cur->firstPFMem) |
| 477 | res = bus_cur->firstPFMem; |
| 478 | break; |
| 479 | case IO: |
| 480 | if (bus_cur->firstIO) |
| 481 | res = bus_cur->firstIO; |
| 482 | break; |
| 483 | } |
| 484 | |
| 485 | if (res) { |
| 486 | while (res) { |
| 487 | if (res->rangeno == rangeno) |
| 488 | break; |
| 489 | if (res->next) |
| 490 | res = res->next; |
| 491 | else if (res->nextRange) |
| 492 | res = res->nextRange; |
| 493 | else { |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 494 | eol = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | break; |
| 496 | } |
| 497 | } |
| 498 | |
| 499 | if (!eol) { |
| 500 | /* found the range */ |
| 501 | while (res) { |
| 502 | ++res->rangeno; |
| 503 | res = res->next; |
| 504 | } |
| 505 | } |
| 506 | } |
| 507 | } |
| 508 | |
| 509 | static void fix_me (struct resource_node *res, struct bus_node *bus_cur, struct range_node *range) |
| 510 | { |
| 511 | char * str = ""; |
| 512 | switch (res->type) { |
| 513 | case IO: |
| 514 | str = "io"; |
| 515 | break; |
| 516 | case MEM: |
| 517 | str = "mem"; |
| 518 | break; |
| 519 | case PFMEM: |
| 520 | str = "pfmem"; |
| 521 | break; |
| 522 | } |
| 523 | |
| 524 | while (res) { |
| 525 | if (res->rangeno == -1) { |
| 526 | while (range) { |
| 527 | if ((res->start >= range->start) && (res->end <= range->end)) { |
| 528 | res->rangeno = range->rangeno; |
| 529 | debug ("%s->rangeno in fix_resources is %d\n", str, res->rangeno); |
| 530 | switch (res->type) { |
| 531 | case IO: |
| 532 | --bus_cur->needIOUpdate; |
| 533 | break; |
| 534 | case MEM: |
| 535 | --bus_cur->needMemUpdate; |
| 536 | break; |
| 537 | case PFMEM: |
| 538 | --bus_cur->needPFMemUpdate; |
| 539 | break; |
| 540 | } |
| 541 | break; |
| 542 | } |
| 543 | range = range->next; |
| 544 | } |
| 545 | } |
| 546 | if (res->next) |
| 547 | res = res->next; |
| 548 | else |
| 549 | res = res->nextRange; |
| 550 | } |
| 551 | |
| 552 | } |
| 553 | |
| 554 | /***************************************************************************** |
| 555 | * This routine reassigns the range numbers to the resources that had a -1 |
| 556 | * This case can happen only if upon initialization, resources taken by pci dev |
| 557 | * appear in EBDA before the resources allocated for that bus, since we don't |
| 558 | * know the range, we assign -1, and this routine is called after a new range |
| 559 | * is assigned to see the resources with unknown range belong to the added range |
| 560 | * |
| 561 | * Input: current bus |
| 562 | * Output: none, list of resources for that bus are fixed if can be |
| 563 | *******************************************************************************/ |
| 564 | static void fix_resources (struct bus_node *bus_cur) |
| 565 | { |
| 566 | struct range_node *range; |
| 567 | struct resource_node *res; |
| 568 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 569 | debug ("%s - bus_cur->busno = %d\n", __func__, bus_cur->busno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | |
| 571 | if (bus_cur->needIOUpdate) { |
| 572 | res = bus_cur->firstIO; |
| 573 | range = bus_cur->rangeIO; |
| 574 | fix_me (res, bus_cur, range); |
| 575 | } |
| 576 | if (bus_cur->needMemUpdate) { |
| 577 | res = bus_cur->firstMem; |
| 578 | range = bus_cur->rangeMem; |
| 579 | fix_me (res, bus_cur, range); |
| 580 | } |
| 581 | if (bus_cur->needPFMemUpdate) { |
| 582 | res = bus_cur->firstPFMem; |
| 583 | range = bus_cur->rangePFMem; |
| 584 | fix_me (res, bus_cur, range); |
| 585 | } |
| 586 | } |
| 587 | |
| 588 | /******************************************************************************* |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 589 | * 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] | 590 | * based on their resource type and sorted by their starting addresses. It assigns |
| 591 | * the ptrs to next and nextRange if needed. |
| 592 | * |
| 593 | * Input: resource ptr |
| 594 | * Output: ptrs assigned (to the node) |
| 595 | * 0 or -1 |
| 596 | *******************************************************************************/ |
| 597 | int ibmphp_add_resource (struct resource_node *res) |
| 598 | { |
| 599 | struct resource_node *res_cur; |
| 600 | struct resource_node *res_prev; |
| 601 | struct bus_node *bus_cur; |
| 602 | struct range_node *range_cur = NULL; |
| 603 | struct resource_node *res_start = NULL; |
| 604 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 605 | debug ("%s - enter\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | |
| 607 | if (!res) { |
| 608 | err ("NULL passed to add\n"); |
| 609 | return -ENODEV; |
| 610 | } |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 611 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | bus_cur = find_bus_wprev (res->busno, NULL, 0); |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 613 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | if (!bus_cur) { |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 615 | /* didn't find a bus, something's wrong!!! */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | debug ("no bus in the system, either pci_dev's wrong or allocation failed\n"); |
| 617 | return -ENODEV; |
| 618 | } |
| 619 | |
| 620 | /* Normal case */ |
| 621 | switch (res->type) { |
| 622 | case IO: |
| 623 | range_cur = bus_cur->rangeIO; |
| 624 | res_start = bus_cur->firstIO; |
| 625 | break; |
| 626 | case MEM: |
| 627 | range_cur = bus_cur->rangeMem; |
| 628 | res_start = bus_cur->firstMem; |
| 629 | break; |
| 630 | case PFMEM: |
| 631 | range_cur = bus_cur->rangePFMem; |
| 632 | res_start = bus_cur->firstPFMem; |
| 633 | break; |
| 634 | default: |
| 635 | err ("cannot read the type of the resource to add... problem\n"); |
| 636 | return -EINVAL; |
| 637 | } |
| 638 | while (range_cur) { |
| 639 | if ((res->start >= range_cur->start) && (res->end <= range_cur->end)) { |
| 640 | res->rangeno = range_cur->rangeno; |
| 641 | break; |
| 642 | } |
| 643 | range_cur = range_cur->next; |
| 644 | } |
| 645 | |
| 646 | /* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
| 647 | * this is again the case of rangeno = -1 |
| 648 | * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
| 649 | */ |
| 650 | |
| 651 | if (!range_cur) { |
| 652 | switch (res->type) { |
| 653 | case IO: |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 654 | ++bus_cur->needIOUpdate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | break; |
| 656 | case MEM: |
| 657 | ++bus_cur->needMemUpdate; |
| 658 | break; |
| 659 | case PFMEM: |
| 660 | ++bus_cur->needPFMemUpdate; |
| 661 | break; |
| 662 | } |
| 663 | res->rangeno = -1; |
| 664 | } |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 665 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | debug ("The range is %d\n", res->rangeno); |
| 667 | if (!res_start) { |
| 668 | /* no first{IO,Mem,Pfmem} on the bus, 1st IO/Mem/Pfmem resource ever */ |
| 669 | switch (res->type) { |
| 670 | case IO: |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 671 | bus_cur->firstIO = res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | break; |
| 673 | case MEM: |
| 674 | bus_cur->firstMem = res; |
| 675 | break; |
| 676 | case PFMEM: |
| 677 | bus_cur->firstPFMem = res; |
| 678 | break; |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 679 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | res->next = NULL; |
| 681 | res->nextRange = NULL; |
| 682 | } else { |
| 683 | res_cur = res_start; |
| 684 | res_prev = NULL; |
| 685 | |
| 686 | debug ("res_cur->rangeno is %d\n", res_cur->rangeno); |
| 687 | |
| 688 | while (res_cur) { |
| 689 | if (res_cur->rangeno >= res->rangeno) |
| 690 | break; |
| 691 | res_prev = res_cur; |
| 692 | if (res_cur->next) |
| 693 | res_cur = res_cur->next; |
| 694 | else |
| 695 | res_cur = res_cur->nextRange; |
| 696 | } |
| 697 | |
| 698 | if (!res_cur) { |
| 699 | /* at the end of the resource list */ |
| 700 | debug ("i should be here, [%x - %x]\n", res->start, res->end); |
| 701 | res_prev->nextRange = res; |
| 702 | res->next = NULL; |
| 703 | res->nextRange = NULL; |
| 704 | } else if (res_cur->rangeno == res->rangeno) { |
| 705 | /* in the same range */ |
| 706 | while (res_cur) { |
| 707 | if (res->start < res_cur->start) |
| 708 | break; |
| 709 | res_prev = res_cur; |
| 710 | res_cur = res_cur->next; |
| 711 | } |
| 712 | if (!res_cur) { |
| 713 | /* the last resource in this range */ |
| 714 | res_prev->next = res; |
| 715 | res->next = NULL; |
| 716 | res->nextRange = res_prev->nextRange; |
| 717 | res_prev->nextRange = NULL; |
| 718 | } else if (res->start < res_cur->start) { |
| 719 | /* at the beginning or middle of the range */ |
| 720 | if (!res_prev) { |
| 721 | switch (res->type) { |
| 722 | case IO: |
| 723 | bus_cur->firstIO = res; |
| 724 | break; |
| 725 | case MEM: |
| 726 | bus_cur->firstMem = res; |
| 727 | break; |
| 728 | case PFMEM: |
| 729 | bus_cur->firstPFMem = res; |
| 730 | break; |
| 731 | } |
| 732 | } else if (res_prev->rangeno == res_cur->rangeno) |
| 733 | res_prev->next = res; |
| 734 | else |
| 735 | res_prev->nextRange = res; |
| 736 | |
| 737 | res->next = res_cur; |
| 738 | res->nextRange = NULL; |
| 739 | } |
| 740 | } else { |
| 741 | /* this is the case where it is 1st occurrence of the range */ |
| 742 | if (!res_prev) { |
| 743 | /* at the beginning of the resource list */ |
| 744 | res->next = NULL; |
| 745 | switch (res->type) { |
| 746 | case IO: |
| 747 | res->nextRange = bus_cur->firstIO; |
| 748 | bus_cur->firstIO = res; |
| 749 | break; |
| 750 | case MEM: |
| 751 | res->nextRange = bus_cur->firstMem; |
| 752 | bus_cur->firstMem = res; |
| 753 | break; |
| 754 | case PFMEM: |
| 755 | res->nextRange = bus_cur->firstPFMem; |
| 756 | bus_cur->firstPFMem = res; |
| 757 | break; |
| 758 | } |
| 759 | } else if (res_cur->rangeno > res->rangeno) { |
| 760 | /* in the middle of the resource list */ |
| 761 | res_prev->nextRange = res; |
| 762 | res->next = NULL; |
| 763 | res->nextRange = res_cur; |
| 764 | } |
| 765 | } |
| 766 | } |
| 767 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 768 | debug ("%s - exit\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | return 0; |
| 770 | } |
| 771 | |
| 772 | /**************************************************************************** |
| 773 | * This routine will remove the resource from the list of resources |
| 774 | * |
| 775 | * Input: io, mem, and/or pfmem resource to be deleted |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 776 | * Output: modified resource list |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | * 0 or error code |
| 778 | ****************************************************************************/ |
| 779 | int ibmphp_remove_resource (struct resource_node *res) |
| 780 | { |
| 781 | struct bus_node *bus_cur; |
| 782 | struct resource_node *res_cur = NULL; |
| 783 | struct resource_node *res_prev; |
| 784 | struct resource_node *mem_cur; |
| 785 | char * type = ""; |
| 786 | |
| 787 | if (!res) { |
| 788 | err ("resource to remove is NULL\n"); |
| 789 | return -ENODEV; |
| 790 | } |
| 791 | |
| 792 | bus_cur = find_bus_wprev (res->busno, NULL, 0); |
| 793 | |
| 794 | if (!bus_cur) { |
Ryan Desfosses | 227f064 | 2014-04-18 20:13:50 -0400 | [diff] [blame] | 795 | 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] | 796 | return -ENODEV; |
| 797 | } |
| 798 | |
| 799 | switch (res->type) { |
| 800 | case IO: |
| 801 | res_cur = bus_cur->firstIO; |
| 802 | type = "io"; |
| 803 | break; |
| 804 | case MEM: |
| 805 | res_cur = bus_cur->firstMem; |
| 806 | type = "mem"; |
| 807 | break; |
| 808 | case PFMEM: |
| 809 | res_cur = bus_cur->firstPFMem; |
| 810 | type = "pfmem"; |
| 811 | break; |
| 812 | default: |
| 813 | err ("unknown type for resource to remove\n"); |
| 814 | return -EINVAL; |
| 815 | } |
| 816 | res_prev = NULL; |
| 817 | |
| 818 | while (res_cur) { |
| 819 | if ((res_cur->start == res->start) && (res_cur->end == res->end)) |
| 820 | break; |
| 821 | res_prev = res_cur; |
| 822 | if (res_cur->next) |
| 823 | res_cur = res_cur->next; |
| 824 | else |
| 825 | res_cur = res_cur->nextRange; |
| 826 | } |
| 827 | |
| 828 | if (!res_cur) { |
| 829 | if (res->type == PFMEM) { |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 830 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | * case where pfmem might be in the PFMemFromMem list |
| 832 | * so will also need to remove the corresponding mem |
| 833 | * entry |
| 834 | */ |
| 835 | res_cur = bus_cur->firstPFMemFromMem; |
| 836 | res_prev = NULL; |
| 837 | |
| 838 | while (res_cur) { |
| 839 | if ((res_cur->start == res->start) && (res_cur->end == res->end)) { |
| 840 | mem_cur = bus_cur->firstMem; |
| 841 | while (mem_cur) { |
| 842 | if ((mem_cur->start == res_cur->start) |
| 843 | && (mem_cur->end == res_cur->end)) |
| 844 | break; |
| 845 | if (mem_cur->next) |
| 846 | mem_cur = mem_cur->next; |
| 847 | else |
| 848 | mem_cur = mem_cur->nextRange; |
| 849 | } |
| 850 | if (!mem_cur) { |
| 851 | err ("cannot find corresponding mem node for pfmem...\n"); |
| 852 | return -EINVAL; |
| 853 | } |
| 854 | |
| 855 | ibmphp_remove_resource (mem_cur); |
| 856 | if (!res_prev) |
| 857 | bus_cur->firstPFMemFromMem = res_cur->next; |
| 858 | else |
| 859 | res_prev->next = res_cur->next; |
| 860 | kfree (res_cur); |
| 861 | return 0; |
| 862 | } |
| 863 | res_prev = res_cur; |
| 864 | if (res_cur->next) |
| 865 | res_cur = res_cur->next; |
| 866 | else |
| 867 | res_cur = res_cur->nextRange; |
| 868 | } |
| 869 | if (!res_cur) { |
| 870 | err ("cannot find pfmem to delete...\n"); |
| 871 | return -EINVAL; |
| 872 | } |
| 873 | } else { |
| 874 | err ("the %s resource is not in the list to be deleted...\n", type); |
| 875 | return -EINVAL; |
| 876 | } |
| 877 | } |
| 878 | if (!res_prev) { |
| 879 | /* first device to be deleted */ |
| 880 | if (res_cur->next) { |
| 881 | switch (res->type) { |
| 882 | case IO: |
| 883 | bus_cur->firstIO = res_cur->next; |
| 884 | break; |
| 885 | case MEM: |
| 886 | bus_cur->firstMem = res_cur->next; |
| 887 | break; |
| 888 | case PFMEM: |
| 889 | bus_cur->firstPFMem = res_cur->next; |
| 890 | break; |
| 891 | } |
| 892 | } else if (res_cur->nextRange) { |
| 893 | switch (res->type) { |
| 894 | case IO: |
| 895 | bus_cur->firstIO = res_cur->nextRange; |
| 896 | break; |
| 897 | case MEM: |
| 898 | bus_cur->firstMem = res_cur->nextRange; |
| 899 | break; |
| 900 | case PFMEM: |
| 901 | bus_cur->firstPFMem = res_cur->nextRange; |
| 902 | break; |
| 903 | } |
| 904 | } else { |
| 905 | switch (res->type) { |
| 906 | case IO: |
| 907 | bus_cur->firstIO = NULL; |
| 908 | break; |
| 909 | case MEM: |
| 910 | bus_cur->firstMem = NULL; |
| 911 | break; |
| 912 | case PFMEM: |
| 913 | bus_cur->firstPFMem = NULL; |
| 914 | break; |
| 915 | } |
| 916 | } |
| 917 | kfree (res_cur); |
| 918 | return 0; |
| 919 | } else { |
| 920 | if (res_cur->next) { |
| 921 | if (res_prev->rangeno == res_cur->rangeno) |
| 922 | res_prev->next = res_cur->next; |
| 923 | else |
| 924 | res_prev->nextRange = res_cur->next; |
| 925 | } else if (res_cur->nextRange) { |
| 926 | res_prev->next = NULL; |
| 927 | res_prev->nextRange = res_cur->nextRange; |
| 928 | } else { |
| 929 | res_prev->next = NULL; |
| 930 | res_prev->nextRange = NULL; |
| 931 | } |
| 932 | kfree (res_cur); |
| 933 | return 0; |
| 934 | } |
| 935 | |
| 936 | return 0; |
| 937 | } |
| 938 | |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 939 | 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] | 940 | { |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 941 | struct range_node *range = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | |
| 943 | switch (res->type) { |
| 944 | case IO: |
| 945 | range = bus_cur->rangeIO; |
| 946 | break; |
| 947 | case MEM: |
| 948 | range = bus_cur->rangeMem; |
| 949 | break; |
| 950 | case PFMEM: |
| 951 | range = bus_cur->rangePFMem; |
| 952 | break; |
| 953 | default: |
| 954 | err ("cannot read resource type in find_range\n"); |
| 955 | } |
| 956 | |
| 957 | while (range) { |
| 958 | if (res->rangeno == range->rangeno) |
| 959 | break; |
| 960 | range = range->next; |
| 961 | } |
| 962 | return range; |
| 963 | } |
| 964 | |
| 965 | /***************************************************************************** |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 966 | * 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] | 967 | * can fit w/i our list of available IO/MEM/PFMEM resources. If cannot, returns -EINVAL, |
| 968 | * otherwise, returns 0 |
| 969 | * |
| 970 | * Input: resource |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 971 | * 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] | 972 | * 0 or -EINVAL |
| 973 | *****************************************************************************/ |
| 974 | int ibmphp_check_resource (struct resource_node *res, u8 bridge) |
| 975 | { |
| 976 | struct bus_node *bus_cur; |
| 977 | struct range_node *range = NULL; |
| 978 | struct resource_node *res_prev; |
| 979 | struct resource_node *res_cur = NULL; |
| 980 | u32 len_cur = 0, start_cur = 0, len_tmp = 0; |
| 981 | int noranges = 0; |
| 982 | u32 tmp_start; /* this is to make sure start address is divisible by the length needed */ |
| 983 | u32 tmp_divide; |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 984 | u8 flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | |
| 986 | if (!res) |
| 987 | return -EINVAL; |
| 988 | |
| 989 | if (bridge) { |
| 990 | /* The rules for bridges are different, 4K divisible for IO, 1M for (pf)mem*/ |
| 991 | if (res->type == IO) |
| 992 | tmp_divide = IOBRIDGE; |
| 993 | else |
| 994 | tmp_divide = MEMBRIDGE; |
| 995 | } else |
| 996 | tmp_divide = res->len; |
| 997 | |
| 998 | bus_cur = find_bus_wprev (res->busno, NULL, 0); |
| 999 | |
| 1000 | if (!bus_cur) { |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1001 | /* didn't find a bus, something's wrong!!! */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | debug ("no bus in the system, either pci_dev's wrong or allocation failed\n"); |
| 1003 | return -EINVAL; |
| 1004 | } |
| 1005 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 1006 | debug ("%s - enter\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | debug ("bus_cur->busno is %d\n", bus_cur->busno); |
| 1008 | |
| 1009 | /* This is a quick fix to not mess up with the code very much. i.e., |
| 1010 | * 2000-2fff, len = 1000, but when we compare, we need it to be fff */ |
| 1011 | res->len -= 1; |
| 1012 | |
| 1013 | switch (res->type) { |
| 1014 | case IO: |
| 1015 | res_cur = bus_cur->firstIO; |
| 1016 | noranges = bus_cur->noIORanges; |
| 1017 | break; |
| 1018 | case MEM: |
| 1019 | res_cur = bus_cur->firstMem; |
| 1020 | noranges = bus_cur->noMemRanges; |
| 1021 | break; |
| 1022 | case PFMEM: |
| 1023 | res_cur = bus_cur->firstPFMem; |
| 1024 | noranges = bus_cur->noPFMemRanges; |
| 1025 | break; |
| 1026 | default: |
| 1027 | err ("wrong type of resource to check\n"); |
| 1028 | return -EINVAL; |
| 1029 | } |
| 1030 | res_prev = NULL; |
| 1031 | |
| 1032 | while (res_cur) { |
| 1033 | range = find_range (bus_cur, res_cur); |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 1034 | debug ("%s - rangeno = %d\n", __func__, res_cur->rangeno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | |
| 1036 | if (!range) { |
| 1037 | err ("no range for the device exists... bailing out...\n"); |
| 1038 | return -EINVAL; |
| 1039 | } |
| 1040 | |
| 1041 | /* found our range */ |
| 1042 | if (!res_prev) { |
| 1043 | /* first time in the loop */ |
Quentin Lambert | 2f4096e | 2014-09-07 20:04:28 +0200 | [diff] [blame] | 1044 | len_tmp = res_cur->start - 1 - range->start; |
| 1045 | |
| 1046 | if ((res_cur->start != range->start) && (len_tmp >= res->len)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | debug ("len_tmp = %x\n", len_tmp); |
| 1048 | |
| 1049 | if ((len_tmp < len_cur) || (len_cur == 0)) { |
| 1050 | |
| 1051 | if ((range->start % tmp_divide) == 0) { |
| 1052 | /* just perfect, starting address is divisible by length */ |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1053 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | len_cur = len_tmp; |
| 1055 | start_cur = range->start; |
| 1056 | } else { |
| 1057 | /* Needs adjusting */ |
| 1058 | tmp_start = range->start; |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1059 | flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | |
| 1061 | while ((len_tmp = res_cur->start - 1 - tmp_start) >= res->len) { |
| 1062 | if ((tmp_start % tmp_divide) == 0) { |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1063 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | len_cur = len_tmp; |
| 1065 | start_cur = tmp_start; |
| 1066 | break; |
| 1067 | } |
| 1068 | tmp_start += tmp_divide - tmp_start % tmp_divide; |
| 1069 | if (tmp_start >= res_cur->start - 1) |
| 1070 | break; |
| 1071 | } |
| 1072 | } |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1073 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | if (flag && len_cur == res->len) { |
| 1075 | debug ("but we are not here, right?\n"); |
| 1076 | res->start = start_cur; |
| 1077 | res->len += 1; /* To restore the balance */ |
| 1078 | res->end = res->start + res->len - 1; |
| 1079 | return 0; |
| 1080 | } |
| 1081 | } |
| 1082 | } |
| 1083 | } |
| 1084 | if (!res_cur->next) { |
| 1085 | /* last device on the range */ |
Quentin Lambert | 2f4096e | 2014-09-07 20:04:28 +0200 | [diff] [blame] | 1086 | len_tmp = range->end - (res_cur->end + 1); |
| 1087 | |
| 1088 | if ((range->end != res_cur->end) && (len_tmp >= res->len)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | debug ("len_tmp = %x\n", len_tmp); |
| 1090 | if ((len_tmp < len_cur) || (len_cur == 0)) { |
| 1091 | |
| 1092 | if (((res_cur->end + 1) % tmp_divide) == 0) { |
| 1093 | /* just perfect, starting address is divisible by length */ |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1094 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | len_cur = len_tmp; |
| 1096 | start_cur = res_cur->end + 1; |
| 1097 | } else { |
| 1098 | /* Needs adjusting */ |
| 1099 | tmp_start = res_cur->end + 1; |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1100 | flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | |
| 1102 | while ((len_tmp = range->end - tmp_start) >= res->len) { |
| 1103 | if ((tmp_start % tmp_divide) == 0) { |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1104 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | len_cur = len_tmp; |
| 1106 | start_cur = tmp_start; |
| 1107 | break; |
| 1108 | } |
| 1109 | tmp_start += tmp_divide - tmp_start % tmp_divide; |
| 1110 | if (tmp_start >= range->end) |
| 1111 | break; |
| 1112 | } |
| 1113 | } |
| 1114 | if (flag && len_cur == res->len) { |
| 1115 | res->start = start_cur; |
| 1116 | res->len += 1; /* To restore the balance */ |
| 1117 | res->end = res->start + res->len - 1; |
| 1118 | return 0; |
| 1119 | } |
| 1120 | } |
| 1121 | } |
| 1122 | } |
| 1123 | |
| 1124 | if (res_prev) { |
| 1125 | if (res_prev->rangeno != res_cur->rangeno) { |
| 1126 | /* 1st device on this range */ |
Quentin Lambert | 2f4096e | 2014-09-07 20:04:28 +0200 | [diff] [blame] | 1127 | len_tmp = res_cur->start - 1 - range->start; |
| 1128 | |
| 1129 | if ((res_cur->start != range->start) && (len_tmp >= res->len)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | if ((len_tmp < len_cur) || (len_cur == 0)) { |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1131 | if ((range->start % tmp_divide) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | /* just perfect, starting address is divisible by length */ |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1133 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | len_cur = len_tmp; |
| 1135 | start_cur = range->start; |
| 1136 | } else { |
| 1137 | /* Needs adjusting */ |
| 1138 | tmp_start = range->start; |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1139 | flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | |
| 1141 | while ((len_tmp = res_cur->start - 1 - tmp_start) >= res->len) { |
| 1142 | if ((tmp_start % tmp_divide) == 0) { |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1143 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | len_cur = len_tmp; |
| 1145 | start_cur = tmp_start; |
| 1146 | break; |
| 1147 | } |
| 1148 | tmp_start += tmp_divide - tmp_start % tmp_divide; |
| 1149 | if (tmp_start >= res_cur->start - 1) |
| 1150 | break; |
| 1151 | } |
| 1152 | } |
| 1153 | |
| 1154 | if (flag && len_cur == res->len) { |
| 1155 | res->start = start_cur; |
| 1156 | res->len += 1; /* To restore the balance */ |
| 1157 | res->end = res->start + res->len - 1; |
| 1158 | return 0; |
| 1159 | } |
| 1160 | } |
| 1161 | } |
| 1162 | } else { |
| 1163 | /* in the same range */ |
Quentin Lambert | 79e50e7 | 2014-09-07 20:03:32 +0200 | [diff] [blame] | 1164 | len_tmp = res_cur->start - 1 - res_prev->end - 1; |
| 1165 | |
| 1166 | if (len_tmp >= res->len) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | if ((len_tmp < len_cur) || (len_cur == 0)) { |
| 1168 | if (((res_prev->end + 1) % tmp_divide) == 0) { |
| 1169 | /* just perfect, starting address's divisible by length */ |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1170 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | len_cur = len_tmp; |
| 1172 | start_cur = res_prev->end + 1; |
| 1173 | } else { |
| 1174 | /* Needs adjusting */ |
| 1175 | tmp_start = res_prev->end + 1; |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1176 | flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | |
| 1178 | while ((len_tmp = res_cur->start - 1 - tmp_start) >= res->len) { |
| 1179 | if ((tmp_start % tmp_divide) == 0) { |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1180 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | len_cur = len_tmp; |
| 1182 | start_cur = tmp_start; |
| 1183 | break; |
| 1184 | } |
| 1185 | tmp_start += tmp_divide - tmp_start % tmp_divide; |
| 1186 | if (tmp_start >= res_cur->start - 1) |
| 1187 | break; |
| 1188 | } |
| 1189 | } |
| 1190 | |
| 1191 | if (flag && len_cur == res->len) { |
| 1192 | res->start = start_cur; |
| 1193 | res->len += 1; /* To restore the balance */ |
| 1194 | res->end = res->start + res->len - 1; |
| 1195 | return 0; |
| 1196 | } |
| 1197 | } |
| 1198 | } |
| 1199 | } |
| 1200 | } |
| 1201 | /* end if (res_prev) */ |
| 1202 | res_prev = res_cur; |
| 1203 | if (res_cur->next) |
| 1204 | res_cur = res_cur->next; |
| 1205 | else |
| 1206 | res_cur = res_cur->nextRange; |
| 1207 | } /* end of while */ |
| 1208 | |
| 1209 | |
| 1210 | if (!res_prev) { |
| 1211 | /* 1st device ever */ |
| 1212 | /* need to find appropriate range */ |
| 1213 | switch (res->type) { |
| 1214 | case IO: |
| 1215 | range = bus_cur->rangeIO; |
| 1216 | break; |
| 1217 | case MEM: |
| 1218 | range = bus_cur->rangeMem; |
| 1219 | break; |
| 1220 | case PFMEM: |
| 1221 | range = bus_cur->rangePFMem; |
| 1222 | break; |
| 1223 | } |
| 1224 | while (range) { |
Quentin Lambert | 79e50e7 | 2014-09-07 20:03:32 +0200 | [diff] [blame] | 1225 | len_tmp = range->end - range->start; |
| 1226 | |
| 1227 | if (len_tmp >= res->len) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | if ((len_tmp < len_cur) || (len_cur == 0)) { |
| 1229 | if ((range->start % tmp_divide) == 0) { |
| 1230 | /* just perfect, starting address's divisible by length */ |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1231 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1232 | len_cur = len_tmp; |
| 1233 | start_cur = range->start; |
| 1234 | } else { |
| 1235 | /* Needs adjusting */ |
| 1236 | tmp_start = range->start; |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1237 | flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | |
| 1239 | while ((len_tmp = range->end - tmp_start) >= res->len) { |
| 1240 | if ((tmp_start % tmp_divide) == 0) { |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1241 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | len_cur = len_tmp; |
| 1243 | start_cur = tmp_start; |
| 1244 | break; |
| 1245 | } |
| 1246 | tmp_start += tmp_divide - tmp_start % tmp_divide; |
| 1247 | if (tmp_start >= range->end) |
| 1248 | break; |
| 1249 | } |
| 1250 | } |
| 1251 | |
| 1252 | if (flag && len_cur == res->len) { |
| 1253 | res->start = start_cur; |
| 1254 | res->len += 1; /* To restore the balance */ |
| 1255 | res->end = res->start + res->len - 1; |
| 1256 | return 0; |
| 1257 | } |
| 1258 | } |
| 1259 | } |
| 1260 | range = range->next; |
| 1261 | } /* end of while */ |
| 1262 | |
| 1263 | if ((!range) && (len_cur == 0)) { |
| 1264 | /* have gone through the list of devices and ranges and haven't found n.e.thing */ |
| 1265 | err ("no appropriate range.. bailing out...\n"); |
| 1266 | return -EINVAL; |
| 1267 | } else if (len_cur) { |
| 1268 | res->start = start_cur; |
| 1269 | res->len += 1; /* To restore the balance */ |
| 1270 | res->end = res->start + res->len - 1; |
| 1271 | return 0; |
| 1272 | } |
| 1273 | } |
| 1274 | |
| 1275 | if (!res_cur) { |
| 1276 | debug ("prev->rangeno = %d, noranges = %d\n", res_prev->rangeno, noranges); |
| 1277 | if (res_prev->rangeno < noranges) { |
| 1278 | /* if there're more ranges out there to check */ |
| 1279 | switch (res->type) { |
| 1280 | case IO: |
| 1281 | range = bus_cur->rangeIO; |
| 1282 | break; |
| 1283 | case MEM: |
| 1284 | range = bus_cur->rangeMem; |
| 1285 | break; |
| 1286 | case PFMEM: |
| 1287 | range = bus_cur->rangePFMem; |
| 1288 | break; |
| 1289 | } |
| 1290 | while (range) { |
Quentin Lambert | 79e50e7 | 2014-09-07 20:03:32 +0200 | [diff] [blame] | 1291 | len_tmp = range->end - range->start; |
| 1292 | |
| 1293 | if (len_tmp >= res->len) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | if ((len_tmp < len_cur) || (len_cur == 0)) { |
| 1295 | if ((range->start % tmp_divide) == 0) { |
| 1296 | /* just perfect, starting address's divisible by length */ |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1297 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | len_cur = len_tmp; |
| 1299 | start_cur = range->start; |
| 1300 | } else { |
| 1301 | /* Needs adjusting */ |
| 1302 | tmp_start = range->start; |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1303 | flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | |
| 1305 | while ((len_tmp = range->end - tmp_start) >= res->len) { |
| 1306 | if ((tmp_start % tmp_divide) == 0) { |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 1307 | flag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | len_cur = len_tmp; |
| 1309 | start_cur = tmp_start; |
| 1310 | break; |
| 1311 | } |
| 1312 | tmp_start += tmp_divide - tmp_start % tmp_divide; |
| 1313 | if (tmp_start >= range->end) |
| 1314 | break; |
| 1315 | } |
| 1316 | } |
| 1317 | |
| 1318 | if (flag && len_cur == res->len) { |
| 1319 | res->start = start_cur; |
| 1320 | res->len += 1; /* To restore the balance */ |
| 1321 | res->end = res->start + res->len - 1; |
| 1322 | return 0; |
| 1323 | } |
| 1324 | } |
| 1325 | } |
| 1326 | range = range->next; |
| 1327 | } /* end of while */ |
| 1328 | |
| 1329 | if ((!range) && (len_cur == 0)) { |
| 1330 | /* have gone through the list of devices and ranges and haven't found n.e.thing */ |
| 1331 | err ("no appropriate range.. bailing out...\n"); |
| 1332 | return -EINVAL; |
| 1333 | } else if (len_cur) { |
| 1334 | res->start = start_cur; |
| 1335 | res->len += 1; /* To restore the balance */ |
| 1336 | res->end = res->start + res->len - 1; |
| 1337 | return 0; |
| 1338 | } |
| 1339 | } else { |
| 1340 | /* no more ranges to check on */ |
| 1341 | if (len_cur) { |
| 1342 | res->start = start_cur; |
| 1343 | res->len += 1; /* To restore the balance */ |
| 1344 | res->end = res->start + res->len - 1; |
| 1345 | return 0; |
| 1346 | } else { |
| 1347 | /* have gone through the list of devices and haven't found n.e.thing */ |
| 1348 | err ("no appropriate range.. bailing out...\n"); |
| 1349 | return -EINVAL; |
| 1350 | } |
| 1351 | } |
Quentin Lambert | 382a9c9 | 2014-09-07 20:02:04 +0200 | [diff] [blame] | 1352 | } /* end if (!res_cur) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1353 | return -EINVAL; |
| 1354 | } |
| 1355 | |
| 1356 | /******************************************************************************** |
| 1357 | * This routine is called from remove_card if the card contained PPB. |
| 1358 | * It will remove all the resources on the bus as well as the bus itself |
| 1359 | * Input: Bus |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1360 | * Output: 0, -ENODEV |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | ********************************************************************************/ |
| 1362 | int ibmphp_remove_bus (struct bus_node *bus, u8 parent_busno) |
| 1363 | { |
| 1364 | struct resource_node *res_cur; |
| 1365 | struct resource_node *res_tmp; |
| 1366 | struct bus_node *prev_bus; |
| 1367 | int rc; |
| 1368 | |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1369 | prev_bus = find_bus_wprev (parent_busno, NULL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | |
| 1371 | if (!prev_bus) { |
| 1372 | debug ("something terribly wrong. Cannot find parent bus to the one to remove\n"); |
| 1373 | return -ENODEV; |
| 1374 | } |
| 1375 | |
| 1376 | debug ("In ibmphp_remove_bus... prev_bus->busno is %x\n", prev_bus->busno); |
| 1377 | |
| 1378 | rc = remove_ranges (bus, prev_bus); |
| 1379 | if (rc) |
| 1380 | return rc; |
| 1381 | |
| 1382 | if (bus->firstIO) { |
| 1383 | res_cur = bus->firstIO; |
| 1384 | while (res_cur) { |
| 1385 | res_tmp = res_cur; |
| 1386 | if (res_cur->next) |
| 1387 | res_cur = res_cur->next; |
| 1388 | else |
| 1389 | res_cur = res_cur->nextRange; |
| 1390 | kfree (res_tmp); |
| 1391 | res_tmp = NULL; |
| 1392 | } |
| 1393 | bus->firstIO = NULL; |
| 1394 | } |
| 1395 | if (bus->firstMem) { |
| 1396 | res_cur = bus->firstMem; |
| 1397 | while (res_cur) { |
| 1398 | res_tmp = res_cur; |
| 1399 | if (res_cur->next) |
| 1400 | res_cur = res_cur->next; |
| 1401 | else |
| 1402 | res_cur = res_cur->nextRange; |
| 1403 | kfree (res_tmp); |
| 1404 | res_tmp = NULL; |
| 1405 | } |
| 1406 | bus->firstMem = NULL; |
| 1407 | } |
| 1408 | if (bus->firstPFMem) { |
| 1409 | res_cur = bus->firstPFMem; |
| 1410 | while (res_cur) { |
| 1411 | res_tmp = res_cur; |
| 1412 | if (res_cur->next) |
| 1413 | res_cur = res_cur->next; |
| 1414 | else |
| 1415 | res_cur = res_cur->nextRange; |
| 1416 | kfree (res_tmp); |
| 1417 | res_tmp = NULL; |
| 1418 | } |
| 1419 | bus->firstPFMem = NULL; |
| 1420 | } |
| 1421 | |
| 1422 | if (bus->firstPFMemFromMem) { |
| 1423 | res_cur = bus->firstPFMemFromMem; |
| 1424 | while (res_cur) { |
| 1425 | res_tmp = res_cur; |
| 1426 | res_cur = res_cur->next; |
| 1427 | |
| 1428 | kfree (res_tmp); |
| 1429 | res_tmp = NULL; |
| 1430 | } |
| 1431 | bus->firstPFMemFromMem = NULL; |
| 1432 | } |
| 1433 | |
| 1434 | list_del (&bus->bus_list); |
| 1435 | kfree (bus); |
| 1436 | return 0; |
| 1437 | } |
| 1438 | |
| 1439 | /****************************************************************************** |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1440 | * 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] | 1441 | * parent's bus in the resources |
| 1442 | * Input: current bus, previous bus |
| 1443 | * Output: 0, -EINVAL |
| 1444 | ******************************************************************************/ |
| 1445 | static int remove_ranges (struct bus_node *bus_cur, struct bus_node *bus_prev) |
| 1446 | { |
| 1447 | struct range_node *range_cur; |
| 1448 | struct range_node *range_tmp; |
| 1449 | int i; |
| 1450 | struct resource_node *res = NULL; |
| 1451 | |
| 1452 | if (bus_cur->noIORanges) { |
| 1453 | range_cur = bus_cur->rangeIO; |
| 1454 | for (i = 0; i < bus_cur->noIORanges; i++) { |
| 1455 | if (ibmphp_find_resource (bus_prev, range_cur->start, &res, IO) < 0) |
| 1456 | return -EINVAL; |
| 1457 | ibmphp_remove_resource (res); |
| 1458 | |
| 1459 | range_tmp = range_cur; |
| 1460 | range_cur = range_cur->next; |
| 1461 | kfree (range_tmp); |
| 1462 | range_tmp = NULL; |
| 1463 | } |
| 1464 | bus_cur->rangeIO = NULL; |
| 1465 | } |
| 1466 | if (bus_cur->noMemRanges) { |
| 1467 | range_cur = bus_cur->rangeMem; |
| 1468 | for (i = 0; i < bus_cur->noMemRanges; i++) { |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1469 | if (ibmphp_find_resource (bus_prev, range_cur->start, &res, MEM) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1470 | return -EINVAL; |
| 1471 | |
| 1472 | ibmphp_remove_resource (res); |
| 1473 | range_tmp = range_cur; |
| 1474 | range_cur = range_cur->next; |
| 1475 | kfree (range_tmp); |
| 1476 | range_tmp = NULL; |
| 1477 | } |
| 1478 | bus_cur->rangeMem = NULL; |
| 1479 | } |
| 1480 | if (bus_cur->noPFMemRanges) { |
| 1481 | range_cur = bus_cur->rangePFMem; |
| 1482 | for (i = 0; i < bus_cur->noPFMemRanges; i++) { |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1483 | if (ibmphp_find_resource (bus_prev, range_cur->start, &res, PFMEM) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1484 | return -EINVAL; |
| 1485 | |
| 1486 | ibmphp_remove_resource (res); |
| 1487 | range_tmp = range_cur; |
| 1488 | range_cur = range_cur->next; |
| 1489 | kfree (range_tmp); |
| 1490 | range_tmp = NULL; |
| 1491 | } |
| 1492 | bus_cur->rangePFMem = NULL; |
| 1493 | } |
| 1494 | return 0; |
| 1495 | } |
| 1496 | |
| 1497 | /* |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1498 | * find the resource node in the bus |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1499 | * Input: Resource needed, start address of the resource, type of resource |
| 1500 | */ |
| 1501 | int ibmphp_find_resource (struct bus_node *bus, u32 start_address, struct resource_node **res, int flag) |
| 1502 | { |
| 1503 | struct resource_node *res_cur = NULL; |
| 1504 | char * type = ""; |
| 1505 | |
| 1506 | if (!bus) { |
| 1507 | err ("The bus passed in NULL to find resource\n"); |
| 1508 | return -ENODEV; |
| 1509 | } |
| 1510 | |
| 1511 | switch (flag) { |
| 1512 | case IO: |
| 1513 | res_cur = bus->firstIO; |
| 1514 | type = "io"; |
| 1515 | break; |
| 1516 | case MEM: |
| 1517 | res_cur = bus->firstMem; |
| 1518 | type = "mem"; |
| 1519 | break; |
| 1520 | case PFMEM: |
| 1521 | res_cur = bus->firstPFMem; |
| 1522 | type = "pfmem"; |
| 1523 | break; |
| 1524 | default: |
| 1525 | err ("wrong type of flag\n"); |
| 1526 | return -EINVAL; |
| 1527 | } |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1528 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | while (res_cur) { |
| 1530 | if (res_cur->start == start_address) { |
| 1531 | *res = res_cur; |
| 1532 | break; |
| 1533 | } |
| 1534 | if (res_cur->next) |
| 1535 | res_cur = res_cur->next; |
| 1536 | else |
| 1537 | res_cur = res_cur->nextRange; |
| 1538 | } |
| 1539 | |
| 1540 | if (!res_cur) { |
| 1541 | if (flag == PFMEM) { |
| 1542 | res_cur = bus->firstPFMemFromMem; |
| 1543 | while (res_cur) { |
| 1544 | if (res_cur->start == start_address) { |
| 1545 | *res = res_cur; |
| 1546 | break; |
| 1547 | } |
| 1548 | res_cur = res_cur->next; |
| 1549 | } |
| 1550 | if (!res_cur) { |
| 1551 | debug ("SOS...cannot find %s resource in the bus.\n", type); |
| 1552 | return -EINVAL; |
| 1553 | } |
| 1554 | } else { |
| 1555 | debug ("SOS... cannot find %s resource in the bus.\n", type); |
| 1556 | return -EINVAL; |
| 1557 | } |
| 1558 | } |
| 1559 | |
| 1560 | if (*res) |
| 1561 | debug ("*res->start = %x\n", (*res)->start); |
| 1562 | |
| 1563 | return 0; |
| 1564 | } |
| 1565 | |
| 1566 | /*********************************************************************** |
| 1567 | * This routine will free the resource structures used by the |
| 1568 | * system. It is called from cleanup routine for the module |
| 1569 | * Parameters: none |
| 1570 | * Returns: none |
| 1571 | ***********************************************************************/ |
| 1572 | void ibmphp_free_resources (void) |
| 1573 | { |
| 1574 | struct bus_node *bus_cur = NULL; |
| 1575 | struct bus_node *bus_tmp; |
| 1576 | struct range_node *range_cur; |
| 1577 | struct range_node *range_tmp; |
| 1578 | struct resource_node *res_cur; |
| 1579 | struct resource_node *res_tmp; |
| 1580 | struct list_head *tmp; |
| 1581 | struct list_head *next; |
| 1582 | int i = 0; |
| 1583 | flags = 1; |
| 1584 | |
| 1585 | list_for_each_safe (tmp, next, &gbuses) { |
| 1586 | bus_cur = list_entry (tmp, struct bus_node, bus_list); |
| 1587 | if (bus_cur->noIORanges) { |
| 1588 | range_cur = bus_cur->rangeIO; |
| 1589 | for (i = 0; i < bus_cur->noIORanges; i++) { |
| 1590 | if (!range_cur) |
| 1591 | break; |
| 1592 | range_tmp = range_cur; |
| 1593 | range_cur = range_cur->next; |
| 1594 | kfree (range_tmp); |
| 1595 | range_tmp = NULL; |
| 1596 | } |
| 1597 | } |
| 1598 | if (bus_cur->noMemRanges) { |
| 1599 | range_cur = bus_cur->rangeMem; |
| 1600 | for (i = 0; i < bus_cur->noMemRanges; i++) { |
| 1601 | if (!range_cur) |
| 1602 | break; |
| 1603 | range_tmp = range_cur; |
| 1604 | range_cur = range_cur->next; |
| 1605 | kfree (range_tmp); |
| 1606 | range_tmp = NULL; |
| 1607 | } |
| 1608 | } |
| 1609 | if (bus_cur->noPFMemRanges) { |
| 1610 | range_cur = bus_cur->rangePFMem; |
| 1611 | for (i = 0; i < bus_cur->noPFMemRanges; i++) { |
| 1612 | if (!range_cur) |
| 1613 | break; |
| 1614 | range_tmp = range_cur; |
| 1615 | range_cur = range_cur->next; |
| 1616 | kfree (range_tmp); |
| 1617 | range_tmp = NULL; |
| 1618 | } |
| 1619 | } |
| 1620 | |
| 1621 | if (bus_cur->firstIO) { |
| 1622 | res_cur = bus_cur->firstIO; |
| 1623 | while (res_cur) { |
| 1624 | res_tmp = res_cur; |
| 1625 | if (res_cur->next) |
| 1626 | res_cur = res_cur->next; |
| 1627 | else |
| 1628 | res_cur = res_cur->nextRange; |
| 1629 | kfree (res_tmp); |
| 1630 | res_tmp = NULL; |
| 1631 | } |
| 1632 | bus_cur->firstIO = NULL; |
| 1633 | } |
| 1634 | if (bus_cur->firstMem) { |
| 1635 | res_cur = bus_cur->firstMem; |
| 1636 | while (res_cur) { |
| 1637 | res_tmp = res_cur; |
| 1638 | if (res_cur->next) |
| 1639 | res_cur = res_cur->next; |
| 1640 | else |
| 1641 | res_cur = res_cur->nextRange; |
| 1642 | kfree (res_tmp); |
| 1643 | res_tmp = NULL; |
| 1644 | } |
| 1645 | bus_cur->firstMem = NULL; |
| 1646 | } |
| 1647 | if (bus_cur->firstPFMem) { |
| 1648 | res_cur = bus_cur->firstPFMem; |
| 1649 | while (res_cur) { |
| 1650 | res_tmp = res_cur; |
| 1651 | if (res_cur->next) |
| 1652 | res_cur = res_cur->next; |
| 1653 | else |
| 1654 | res_cur = res_cur->nextRange; |
| 1655 | kfree (res_tmp); |
| 1656 | res_tmp = NULL; |
| 1657 | } |
| 1658 | bus_cur->firstPFMem = NULL; |
| 1659 | } |
| 1660 | |
| 1661 | if (bus_cur->firstPFMemFromMem) { |
| 1662 | res_cur = bus_cur->firstPFMemFromMem; |
| 1663 | while (res_cur) { |
| 1664 | res_tmp = res_cur; |
| 1665 | res_cur = res_cur->next; |
| 1666 | |
| 1667 | kfree (res_tmp); |
| 1668 | res_tmp = NULL; |
| 1669 | } |
| 1670 | bus_cur->firstPFMemFromMem = NULL; |
| 1671 | } |
| 1672 | |
| 1673 | bus_tmp = bus_cur; |
| 1674 | list_del (&bus_cur->bus_list); |
| 1675 | kfree (bus_tmp); |
| 1676 | bus_tmp = NULL; |
| 1677 | } |
| 1678 | } |
| 1679 | |
| 1680 | /********************************************************************************* |
| 1681 | * This function will go over the PFmem resources to check if the EBDA allocated |
| 1682 | * pfmem out of memory buckets of the bus. If so, it will change the range numbers |
| 1683 | * and a flag to indicate that this resource is out of memory. It will also move the |
| 1684 | * Pfmem out of the pfmem resource list to the PFMemFromMem list, and will create |
| 1685 | * a new Mem node |
| 1686 | * This routine is called right after initialization |
| 1687 | *******************************************************************************/ |
| 1688 | static int __init once_over (void) |
| 1689 | { |
| 1690 | struct resource_node *pfmem_cur; |
| 1691 | struct resource_node *pfmem_prev; |
| 1692 | struct resource_node *mem; |
| 1693 | struct bus_node *bus_cur; |
| 1694 | struct list_head *tmp; |
| 1695 | |
| 1696 | list_for_each (tmp, &gbuses) { |
| 1697 | bus_cur = list_entry (tmp, struct bus_node, bus_list); |
| 1698 | if ((!bus_cur->rangePFMem) && (bus_cur->firstPFMem)) { |
| 1699 | 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] | 1700 | pfmem_cur->fromMem = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | if (pfmem_prev) |
| 1702 | pfmem_prev->next = pfmem_cur->next; |
| 1703 | else |
| 1704 | bus_cur->firstPFMem = pfmem_cur->next; |
| 1705 | |
| 1706 | if (!bus_cur->firstPFMemFromMem) |
| 1707 | pfmem_cur->next = NULL; |
| 1708 | else |
| 1709 | /* we don't need to sort PFMemFromMem since we're using mem node for |
| 1710 | all the real work anyways, so just insert at the beginning of the |
| 1711 | list |
| 1712 | */ |
| 1713 | pfmem_cur->next = bus_cur->firstPFMemFromMem; |
| 1714 | |
| 1715 | bus_cur->firstPFMemFromMem = pfmem_cur; |
| 1716 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 1717 | mem = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1718 | if (!mem) { |
| 1719 | err ("out of system memory\n"); |
| 1720 | return -ENOMEM; |
| 1721 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1722 | mem->type = MEM; |
| 1723 | mem->busno = pfmem_cur->busno; |
| 1724 | mem->devfunc = pfmem_cur->devfunc; |
| 1725 | mem->start = pfmem_cur->start; |
| 1726 | mem->end = pfmem_cur->end; |
| 1727 | mem->len = pfmem_cur->len; |
| 1728 | if (ibmphp_add_resource (mem) < 0) |
| 1729 | err ("Trouble...trouble... EBDA allocated pfmem from mem, but system doesn't display it has this space... unless not PCI device...\n"); |
| 1730 | pfmem_cur->rangeno = mem->rangeno; |
| 1731 | } /* end for pfmem */ |
| 1732 | } /* end if */ |
| 1733 | } /* end list_for_each bus */ |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1734 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1735 | } |
| 1736 | |
| 1737 | int ibmphp_add_pfmem_from_mem (struct resource_node *pfmem) |
| 1738 | { |
| 1739 | struct bus_node *bus_cur = find_bus_wprev (pfmem->busno, NULL, 0); |
| 1740 | |
| 1741 | if (!bus_cur) { |
| 1742 | err ("cannot find bus of pfmem to add...\n"); |
| 1743 | return -ENODEV; |
| 1744 | } |
| 1745 | |
| 1746 | if (bus_cur->firstPFMemFromMem) |
| 1747 | pfmem->next = bus_cur->firstPFMemFromMem; |
| 1748 | else |
| 1749 | pfmem->next = NULL; |
| 1750 | |
| 1751 | bus_cur->firstPFMemFromMem = pfmem; |
| 1752 | |
| 1753 | return 0; |
| 1754 | } |
| 1755 | |
| 1756 | /* This routine just goes through the buses to see if the bus already exists. |
| 1757 | * It is called from ibmphp_find_sec_number, to find out a secondary bus number for |
| 1758 | * bridged cards |
| 1759 | * Parameters: bus_number |
| 1760 | * Returns: Bus pointer or NULL |
| 1761 | */ |
| 1762 | struct bus_node *ibmphp_find_res_bus (u8 bus_number) |
| 1763 | { |
| 1764 | return find_bus_wprev (bus_number, NULL, 0); |
| 1765 | } |
| 1766 | |
| 1767 | static struct bus_node *find_bus_wprev (u8 bus_number, struct bus_node **prev, u8 flag) |
| 1768 | { |
| 1769 | struct bus_node *bus_cur; |
| 1770 | struct list_head *tmp; |
| 1771 | struct list_head *tmp_prev; |
| 1772 | |
| 1773 | list_for_each (tmp, &gbuses) { |
| 1774 | tmp_prev = tmp->prev; |
| 1775 | bus_cur = list_entry (tmp, struct bus_node, bus_list); |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1776 | if (flag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1777 | *prev = list_entry (tmp_prev, struct bus_node, bus_list); |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1778 | if (bus_cur->busno == bus_number) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1779 | return bus_cur; |
| 1780 | } |
| 1781 | |
| 1782 | return NULL; |
| 1783 | } |
| 1784 | |
| 1785 | void ibmphp_print_test (void) |
| 1786 | { |
| 1787 | int i = 0; |
| 1788 | struct bus_node *bus_cur = NULL; |
| 1789 | struct range_node *range; |
| 1790 | struct resource_node *res; |
| 1791 | struct list_head *tmp; |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1792 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1793 | debug_pci ("*****************START**********************\n"); |
| 1794 | |
| 1795 | if ((!list_empty(&gbuses)) && flags) { |
| 1796 | err ("The GBUSES is not NULL?!?!?!?!?\n"); |
| 1797 | return; |
| 1798 | } |
| 1799 | |
| 1800 | list_for_each (tmp, &gbuses) { |
| 1801 | bus_cur = list_entry (tmp, struct bus_node, bus_list); |
| 1802 | debug_pci ("This is bus # %d. There are\n", bus_cur->busno); |
| 1803 | debug_pci ("IORanges = %d\t", bus_cur->noIORanges); |
| 1804 | debug_pci ("MemRanges = %d\t", bus_cur->noMemRanges); |
| 1805 | debug_pci ("PFMemRanges = %d\n", bus_cur->noPFMemRanges); |
| 1806 | debug_pci ("The IO Ranges are as follows:\n"); |
| 1807 | if (bus_cur->rangeIO) { |
| 1808 | range = bus_cur->rangeIO; |
| 1809 | for (i = 0; i < bus_cur->noIORanges; i++) { |
| 1810 | debug_pci ("rangeno is %d\n", range->rangeno); |
| 1811 | debug_pci ("[%x - %x]\n", range->start, range->end); |
| 1812 | range = range->next; |
| 1813 | } |
| 1814 | } |
| 1815 | |
| 1816 | debug_pci ("The Mem Ranges are as follows:\n"); |
| 1817 | if (bus_cur->rangeMem) { |
| 1818 | range = bus_cur->rangeMem; |
| 1819 | for (i = 0; i < bus_cur->noMemRanges; i++) { |
| 1820 | debug_pci ("rangeno is %d\n", range->rangeno); |
| 1821 | debug_pci ("[%x - %x]\n", range->start, range->end); |
| 1822 | range = range->next; |
| 1823 | } |
| 1824 | } |
| 1825 | |
| 1826 | debug_pci ("The PFMem Ranges are as follows:\n"); |
| 1827 | |
| 1828 | if (bus_cur->rangePFMem) { |
| 1829 | range = bus_cur->rangePFMem; |
| 1830 | for (i = 0; i < bus_cur->noPFMemRanges; i++) { |
| 1831 | debug_pci ("rangeno is %d\n", range->rangeno); |
| 1832 | debug_pci ("[%x - %x]\n", range->start, range->end); |
| 1833 | range = range->next; |
| 1834 | } |
| 1835 | } |
| 1836 | |
| 1837 | debug_pci ("The resources on this bus are as follows\n"); |
| 1838 | |
| 1839 | debug_pci ("IO...\n"); |
| 1840 | if (bus_cur->firstIO) { |
| 1841 | res = bus_cur->firstIO; |
| 1842 | while (res) { |
| 1843 | debug_pci ("The range # is %d\n", res->rangeno); |
| 1844 | debug_pci ("The bus, devfnc is %d, %x\n", res->busno, res->devfunc); |
| 1845 | debug_pci ("[%x - %x], len=%x\n", res->start, res->end, res->len); |
| 1846 | if (res->next) |
| 1847 | res = res->next; |
| 1848 | else if (res->nextRange) |
| 1849 | res = res->nextRange; |
| 1850 | else |
| 1851 | break; |
| 1852 | } |
| 1853 | } |
| 1854 | debug_pci ("Mem...\n"); |
| 1855 | if (bus_cur->firstMem) { |
| 1856 | res = bus_cur->firstMem; |
| 1857 | while (res) { |
| 1858 | debug_pci ("The range # is %d\n", res->rangeno); |
| 1859 | debug_pci ("The bus, devfnc is %d, %x\n", res->busno, res->devfunc); |
| 1860 | debug_pci ("[%x - %x], len=%x\n", res->start, res->end, res->len); |
| 1861 | if (res->next) |
| 1862 | res = res->next; |
| 1863 | else if (res->nextRange) |
| 1864 | res = res->nextRange; |
| 1865 | else |
| 1866 | break; |
| 1867 | } |
| 1868 | } |
| 1869 | debug_pci ("PFMem...\n"); |
| 1870 | if (bus_cur->firstPFMem) { |
| 1871 | res = bus_cur->firstPFMem; |
| 1872 | while (res) { |
| 1873 | debug_pci ("The range # is %d\n", res->rangeno); |
| 1874 | debug_pci ("The bus, devfnc is %d, %x\n", res->busno, res->devfunc); |
| 1875 | debug_pci ("[%x - %x], len=%x\n", res->start, res->end, res->len); |
| 1876 | if (res->next) |
| 1877 | res = res->next; |
| 1878 | else if (res->nextRange) |
| 1879 | res = res->nextRange; |
| 1880 | else |
| 1881 | break; |
| 1882 | } |
| 1883 | } |
| 1884 | |
| 1885 | debug_pci ("PFMemFromMem...\n"); |
| 1886 | if (bus_cur->firstPFMemFromMem) { |
| 1887 | res = bus_cur->firstPFMemFromMem; |
| 1888 | while (res) { |
| 1889 | debug_pci ("The range # is %d\n", res->rangeno); |
| 1890 | debug_pci ("The bus, devfnc is %d, %x\n", res->busno, res->devfunc); |
| 1891 | debug_pci ("[%x - %x], len=%x\n", res->start, res->end, res->len); |
| 1892 | res = res->next; |
| 1893 | } |
| 1894 | } |
| 1895 | } |
| 1896 | debug_pci ("***********************END***********************\n"); |
| 1897 | } |
| 1898 | |
| 1899 | static int range_exists_already (struct range_node * range, struct bus_node * bus_cur, u8 type) |
| 1900 | { |
| 1901 | struct range_node * range_cur = NULL; |
| 1902 | switch (type) { |
| 1903 | case IO: |
| 1904 | range_cur = bus_cur->rangeIO; |
| 1905 | break; |
| 1906 | case MEM: |
| 1907 | range_cur = bus_cur->rangeMem; |
| 1908 | break; |
| 1909 | case PFMEM: |
| 1910 | range_cur = bus_cur->rangePFMem; |
| 1911 | break; |
| 1912 | default: |
| 1913 | err ("wrong type passed to find out if range already exists\n"); |
| 1914 | return -ENODEV; |
| 1915 | } |
| 1916 | |
| 1917 | while (range_cur) { |
| 1918 | if ((range_cur->start == range->start) && (range_cur->end == range->end)) |
| 1919 | return 1; |
| 1920 | range_cur = range_cur->next; |
| 1921 | } |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1922 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1923 | return 0; |
| 1924 | } |
| 1925 | |
| 1926 | /* This routine will read the windows for any PPB we have and update the |
| 1927 | * range info for the secondary bus, and will also input this info into |
| 1928 | * primary bus, since BIOS doesn't. This is for PPB that are in the system |
| 1929 | * on bootup. For bridged cards that were added during previous load of the |
| 1930 | * driver, only the ranges and the bus structure are added, the devices are |
| 1931 | * added from NVRAM |
| 1932 | * Input: primary busno |
| 1933 | * Returns: none |
| 1934 | * Note: this function doesn't take into account IO restrictions etc, |
| 1935 | * 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] | 1936 | * 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] | 1937 | * behind them All these are TO DO. |
| 1938 | * Also need to add more error checkings... (from fnc returns etc) |
| 1939 | */ |
| 1940 | static int __init update_bridge_ranges (struct bus_node **bus) |
| 1941 | { |
| 1942 | u8 sec_busno, device, function, hdr_type, start_io_address, end_io_address; |
| 1943 | u16 vendor_id, upper_io_start, upper_io_end, start_mem_address, end_mem_address; |
| 1944 | u32 start_address, end_address, upper_start, upper_end; |
| 1945 | struct bus_node *bus_sec; |
| 1946 | struct bus_node *bus_cur; |
| 1947 | struct resource_node *io; |
| 1948 | struct resource_node *mem; |
| 1949 | struct resource_node *pfmem; |
| 1950 | struct range_node *range; |
| 1951 | unsigned int devfn; |
| 1952 | |
| 1953 | bus_cur = *bus; |
| 1954 | if (!bus_cur) |
| 1955 | return -ENODEV; |
| 1956 | ibmphp_pci_bus->number = bus_cur->busno; |
| 1957 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 1958 | debug ("inside %s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1959 | debug ("bus_cur->busno = %x\n", bus_cur->busno); |
| 1960 | |
| 1961 | for (device = 0; device < 32; device++) { |
| 1962 | for (function = 0x00; function < 0x08; function++) { |
| 1963 | devfn = PCI_DEVFN(device, function); |
| 1964 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_VENDOR_ID, &vendor_id); |
| 1965 | |
| 1966 | if (vendor_id != PCI_VENDOR_ID_NOTVALID) { |
| 1967 | /* found correct device!!! */ |
| 1968 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_HEADER_TYPE, &hdr_type); |
| 1969 | |
| 1970 | switch (hdr_type) { |
| 1971 | case PCI_HEADER_TYPE_NORMAL: |
| 1972 | function = 0x8; |
| 1973 | break; |
| 1974 | case PCI_HEADER_TYPE_MULTIDEVICE: |
| 1975 | break; |
| 1976 | case PCI_HEADER_TYPE_BRIDGE: |
| 1977 | function = 0x8; |
| 1978 | case PCI_HEADER_TYPE_MULTIBRIDGE: |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1979 | /* We assume here that only 1 bus behind the bridge |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1980 | TO DO: add functionality for several: |
| 1981 | temp = secondary; |
| 1982 | while (temp < subordinate) { |
| 1983 | ... |
| 1984 | temp++; |
| 1985 | } |
| 1986 | */ |
| 1987 | 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] | 1988 | bus_sec = find_bus_wprev (sec_busno, NULL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1989 | /* this bus structure doesn't exist yet, PPB was configured during previous loading of ibmphp */ |
| 1990 | if (!bus_sec) { |
| 1991 | bus_sec = alloc_error_bus (NULL, sec_busno, 1); |
| 1992 | /* the rest will be populated during NVRAM call */ |
| 1993 | return 0; |
| 1994 | } |
| 1995 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_IO_BASE, &start_io_address); |
| 1996 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_IO_LIMIT, &end_io_address); |
| 1997 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_IO_BASE_UPPER16, &upper_io_start); |
| 1998 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_IO_LIMIT_UPPER16, &upper_io_end); |
| 1999 | start_address = (start_io_address & PCI_IO_RANGE_MASK) << 8; |
| 2000 | start_address |= (upper_io_start << 16); |
| 2001 | end_address = (end_io_address & PCI_IO_RANGE_MASK) << 8; |
| 2002 | end_address |= (upper_io_end << 16); |
| 2003 | |
| 2004 | if ((start_address) && (start_address <= end_address)) { |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 2005 | range = kzalloc(sizeof(struct range_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2006 | if (!range) { |
| 2007 | err ("out of system memory\n"); |
| 2008 | return -ENOMEM; |
| 2009 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2010 | range->start = start_address; |
| 2011 | range->end = end_address + 0xfff; |
| 2012 | |
| 2013 | if (bus_sec->noIORanges > 0) { |
| 2014 | if (!range_exists_already (range, bus_sec, IO)) { |
H. Peter Anvin | c85e4aa | 2010-02-10 17:45:09 -0800 | [diff] [blame] | 2015 | add_bus_range (IO, range, bus_sec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2016 | ++bus_sec->noIORanges; |
| 2017 | } else { |
| 2018 | kfree (range); |
| 2019 | range = NULL; |
| 2020 | } |
| 2021 | } else { |
| 2022 | /* 1st IO Range on the bus */ |
| 2023 | range->rangeno = 1; |
| 2024 | bus_sec->rangeIO = range; |
| 2025 | ++bus_sec->noIORanges; |
| 2026 | } |
| 2027 | fix_resources (bus_sec); |
| 2028 | |
| 2029 | if (ibmphp_find_resource (bus_cur, start_address, &io, IO)) { |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 2030 | io = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2031 | if (!io) { |
| 2032 | kfree (range); |
| 2033 | err ("out of system memory\n"); |
| 2034 | return -ENOMEM; |
| 2035 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2036 | io->type = IO; |
| 2037 | io->busno = bus_cur->busno; |
| 2038 | io->devfunc = ((device << 3) | (function & 0x7)); |
| 2039 | io->start = start_address; |
| 2040 | io->end = end_address + 0xfff; |
| 2041 | io->len = io->end - io->start + 1; |
| 2042 | ibmphp_add_resource (io); |
| 2043 | } |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 2044 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2045 | |
| 2046 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_MEMORY_BASE, &start_mem_address); |
| 2047 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_MEMORY_LIMIT, &end_mem_address); |
| 2048 | |
| 2049 | start_address = 0x00000000 | (start_mem_address & PCI_MEMORY_RANGE_MASK) << 16; |
| 2050 | end_address = 0x00000000 | (end_mem_address & PCI_MEMORY_RANGE_MASK) << 16; |
| 2051 | |
| 2052 | if ((start_address) && (start_address <= end_address)) { |
| 2053 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 2054 | range = kzalloc(sizeof(struct range_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2055 | if (!range) { |
| 2056 | err ("out of system memory\n"); |
| 2057 | return -ENOMEM; |
| 2058 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2059 | range->start = start_address; |
| 2060 | range->end = end_address + 0xfffff; |
| 2061 | |
| 2062 | if (bus_sec->noMemRanges > 0) { |
| 2063 | if (!range_exists_already (range, bus_sec, MEM)) { |
H. Peter Anvin | c85e4aa | 2010-02-10 17:45:09 -0800 | [diff] [blame] | 2064 | add_bus_range (MEM, range, bus_sec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2065 | ++bus_sec->noMemRanges; |
| 2066 | } else { |
| 2067 | kfree (range); |
| 2068 | range = NULL; |
| 2069 | } |
| 2070 | } else { |
| 2071 | /* 1st Mem Range on the bus */ |
| 2072 | range->rangeno = 1; |
| 2073 | bus_sec->rangeMem = range; |
| 2074 | ++bus_sec->noMemRanges; |
| 2075 | } |
| 2076 | |
| 2077 | fix_resources (bus_sec); |
| 2078 | |
| 2079 | if (ibmphp_find_resource (bus_cur, start_address, &mem, MEM)) { |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 2080 | mem = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2081 | if (!mem) { |
| 2082 | kfree (range); |
| 2083 | err ("out of system memory\n"); |
| 2084 | return -ENOMEM; |
| 2085 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2086 | mem->type = MEM; |
| 2087 | mem->busno = bus_cur->busno; |
| 2088 | mem->devfunc = ((device << 3) | (function & 0x7)); |
| 2089 | mem->start = start_address; |
| 2090 | mem->end = end_address + 0xfffff; |
| 2091 | mem->len = mem->end - mem->start + 1; |
| 2092 | ibmphp_add_resource (mem); |
| 2093 | } |
| 2094 | } |
| 2095 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_BASE, &start_mem_address); |
| 2096 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, &end_mem_address); |
| 2097 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, PCI_PREF_BASE_UPPER32, &upper_start); |
| 2098 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, PCI_PREF_LIMIT_UPPER32, &upper_end); |
| 2099 | start_address = 0x00000000 | (start_mem_address & PCI_MEMORY_RANGE_MASK) << 16; |
| 2100 | end_address = 0x00000000 | (end_mem_address & PCI_MEMORY_RANGE_MASK) << 16; |
| 2101 | #if BITS_PER_LONG == 64 |
| 2102 | start_address |= ((long) upper_start) << 32; |
| 2103 | end_address |= ((long) upper_end) << 32; |
| 2104 | #endif |
| 2105 | |
| 2106 | if ((start_address) && (start_address <= end_address)) { |
| 2107 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 2108 | range = kzalloc(sizeof(struct range_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2109 | if (!range) { |
| 2110 | err ("out of system memory\n"); |
| 2111 | return -ENOMEM; |
| 2112 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2113 | range->start = start_address; |
| 2114 | range->end = end_address + 0xfffff; |
| 2115 | |
| 2116 | if (bus_sec->noPFMemRanges > 0) { |
| 2117 | if (!range_exists_already (range, bus_sec, PFMEM)) { |
H. Peter Anvin | c85e4aa | 2010-02-10 17:45:09 -0800 | [diff] [blame] | 2118 | add_bus_range (PFMEM, range, bus_sec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2119 | ++bus_sec->noPFMemRanges; |
| 2120 | } else { |
| 2121 | kfree (range); |
| 2122 | range = NULL; |
| 2123 | } |
| 2124 | } else { |
| 2125 | /* 1st PFMem Range on the bus */ |
| 2126 | range->rangeno = 1; |
| 2127 | bus_sec->rangePFMem = range; |
| 2128 | ++bus_sec->noPFMemRanges; |
| 2129 | } |
| 2130 | |
| 2131 | fix_resources (bus_sec); |
| 2132 | if (ibmphp_find_resource (bus_cur, start_address, &pfmem, PFMEM)) { |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 2133 | pfmem = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2134 | if (!pfmem) { |
| 2135 | kfree (range); |
| 2136 | err ("out of system memory\n"); |
| 2137 | return -ENOMEM; |
| 2138 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2139 | pfmem->type = PFMEM; |
| 2140 | pfmem->busno = bus_cur->busno; |
| 2141 | pfmem->devfunc = ((device << 3) | (function & 0x7)); |
| 2142 | pfmem->start = start_address; |
| 2143 | pfmem->end = end_address + 0xfffff; |
| 2144 | pfmem->len = pfmem->end - pfmem->start + 1; |
Kristen Accardi | dc6712d | 2006-03-14 16:24:47 -0800 | [diff] [blame] | 2145 | pfmem->fromMem = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2146 | |
| 2147 | ibmphp_add_resource (pfmem); |
| 2148 | } |
| 2149 | } |
| 2150 | break; |
| 2151 | } /* end of switch */ |
| 2152 | } /* end if vendor */ |
| 2153 | } /* end for function */ |
| 2154 | } /* end for device */ |
| 2155 | |
| 2156 | bus = &bus_cur; |
| 2157 | return 0; |
| 2158 | } |