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 "ibmphp.h" |
| 35 | |
| 36 | |
| 37 | static int configure_device(struct pci_func *); |
| 38 | static int configure_bridge(struct pci_func **, u8); |
| 39 | static struct res_needed *scan_behind_bridge(struct pci_func *, u8); |
| 40 | static int add_new_bus (struct bus_node *, struct resource_node *, struct resource_node *, struct resource_node *, u8); |
| 41 | static u8 find_sec_number (u8 primary_busno, u8 slotno); |
| 42 | |
| 43 | /* |
| 44 | * NOTE..... If BIOS doesn't provide default routing, we assign: |
| 45 | * 9 for SCSI, 10 for LAN adapters, and 11 for everything else. |
| 46 | * If adapter is bridged, then we assign 11 to it and devices behind it. |
| 47 | * We also assign the same irq numbers for multi function devices. |
| 48 | * These are PIC mode, so shouldn't matter n.e.ways (hopefully) |
| 49 | */ |
| 50 | static void assign_alt_irq (struct pci_func * cur_func, u8 class_code) |
| 51 | { |
| 52 | int j; |
| 53 | for (j = 0; j < 4; j++) { |
| 54 | if (cur_func->irq[j] == 0xff) { |
| 55 | switch (class_code) { |
| 56 | case PCI_BASE_CLASS_STORAGE: |
| 57 | cur_func->irq[j] = SCSI_IRQ; |
| 58 | break; |
| 59 | case PCI_BASE_CLASS_NETWORK: |
| 60 | cur_func->irq[j] = LAN_IRQ; |
| 61 | break; |
| 62 | default: |
| 63 | cur_func->irq[j] = OTHER_IRQ; |
| 64 | break; |
| 65 | } |
| 66 | } |
| 67 | } |
| 68 | } |
| 69 | |
| 70 | /* |
| 71 | * Configures the device to be added (will allocate needed resources if it |
| 72 | * can), the device can be a bridge or a regular pci device, can also be |
| 73 | * multi-functional |
| 74 | * |
| 75 | * Input: function to be added |
| 76 | * |
| 77 | * TO DO: The error case with Multifunction device or multi function bridge, |
| 78 | * if there is an error, will need to go through all previous functions and |
| 79 | * unconfigure....or can add some code into unconfigure_card.... |
| 80 | */ |
| 81 | int ibmphp_configure_card (struct pci_func *func, u8 slotno) |
| 82 | { |
| 83 | u16 vendor_id; |
| 84 | u32 class; |
| 85 | u8 class_code; |
| 86 | u8 hdr_type, device, sec_number; |
| 87 | u8 function; |
| 88 | struct pci_func *newfunc; /* for multi devices */ |
| 89 | struct pci_func *cur_func, *prev_func; |
| 90 | int rc, i, j; |
| 91 | int cleanup_count; |
| 92 | u8 flag; |
| 93 | u8 valid_device = 0x00; /* to see if we are able to read from card any device info at all */ |
| 94 | |
| 95 | debug ("inside configure_card, func->busno = %x\n", func->busno); |
| 96 | |
| 97 | device = func->device; |
| 98 | cur_func = func; |
| 99 | |
| 100 | /* We only get bus and device from IRQ routing table. So at this point, |
| 101 | * func->busno is correct, and func->device contains only device (at the 5 |
| 102 | * highest bits) |
| 103 | */ |
| 104 | |
| 105 | /* For every function on the card */ |
| 106 | for (function = 0x00; function < 0x08; function++) { |
| 107 | unsigned int devfn = PCI_DEVFN(device, function); |
| 108 | ibmphp_pci_bus->number = cur_func->busno; |
| 109 | |
| 110 | cur_func->function = function; |
| 111 | |
| 112 | debug ("inside the loop, cur_func->busno = %x, cur_func->device = %x, cur_func->funcion = %x\n", |
| 113 | cur_func->busno, cur_func->device, cur_func->function); |
| 114 | |
| 115 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_VENDOR_ID, &vendor_id); |
| 116 | |
| 117 | debug ("vendor_id is %x\n", vendor_id); |
| 118 | if (vendor_id != PCI_VENDOR_ID_NOTVALID) { |
| 119 | /* found correct device!!! */ |
| 120 | debug ("found valid device, vendor_id = %x\n", vendor_id); |
| 121 | |
| 122 | ++valid_device; |
| 123 | |
| 124 | /* header: x x x x x x x x |
| 125 | * | |___________|=> 1=PPB bridge, 0=normal device, 2=CardBus Bridge |
| 126 | * |_=> 0 = single function device, 1 = multi-function device |
| 127 | */ |
| 128 | |
| 129 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_HEADER_TYPE, &hdr_type); |
| 130 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, PCI_CLASS_REVISION, &class); |
| 131 | |
| 132 | class_code = class >> 24; |
| 133 | debug ("hrd_type = %x, class = %x, class_code %x\n", hdr_type, class, class_code); |
| 134 | class >>= 8; /* to take revision out, class = class.subclass.prog i/f */ |
| 135 | if (class == PCI_CLASS_NOT_DEFINED_VGA) { |
| 136 | err ("The device %x is VGA compatible and as is not supported for hot plugging. " |
| 137 | "Please choose another device.\n", cur_func->device); |
| 138 | return -ENODEV; |
| 139 | } else if (class == PCI_CLASS_DISPLAY_VGA) { |
| 140 | err ("The device %x is not supported for hot plugging. " |
| 141 | "Please choose another device.\n", cur_func->device); |
| 142 | return -ENODEV; |
| 143 | } |
| 144 | switch (hdr_type) { |
| 145 | case PCI_HEADER_TYPE_NORMAL: |
| 146 | debug ("single device case.... vendor id = %x, hdr_type = %x, class = %x\n", vendor_id, hdr_type, class); |
| 147 | assign_alt_irq (cur_func, class_code); |
| 148 | if ((rc = configure_device (cur_func)) < 0) { |
| 149 | /* We need to do this in case some other BARs were properly inserted */ |
| 150 | err ("was not able to configure devfunc %x on bus %x.\n", |
| 151 | cur_func->device, cur_func->busno); |
| 152 | cleanup_count = 6; |
| 153 | goto error; |
| 154 | } |
| 155 | cur_func->next = NULL; |
| 156 | function = 0x8; |
| 157 | break; |
| 158 | case PCI_HEADER_TYPE_MULTIDEVICE: |
| 159 | assign_alt_irq (cur_func, class_code); |
| 160 | if ((rc = configure_device (cur_func)) < 0) { |
| 161 | /* We need to do this in case some other BARs were properly inserted */ |
| 162 | err ("was not able to configure devfunc %x on bus %x...bailing out\n", |
| 163 | cur_func->device, cur_func->busno); |
| 164 | cleanup_count = 6; |
| 165 | goto error; |
| 166 | } |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame^] | 167 | newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | if (!newfunc) { |
| 169 | err ("out of system memory\n"); |
| 170 | return -ENOMEM; |
| 171 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | newfunc->busno = cur_func->busno; |
| 173 | newfunc->device = device; |
| 174 | cur_func->next = newfunc; |
| 175 | cur_func = newfunc; |
| 176 | for (j = 0; j < 4; j++) |
| 177 | newfunc->irq[j] = cur_func->irq[j]; |
| 178 | break; |
| 179 | case PCI_HEADER_TYPE_MULTIBRIDGE: |
| 180 | class >>= 8; |
| 181 | if (class != PCI_CLASS_BRIDGE_PCI) { |
| 182 | err ("This %x is not PCI-to-PCI bridge, and as is not supported for hot-plugging. " |
| 183 | "Please insert another card.\n", cur_func->device); |
| 184 | return -ENODEV; |
| 185 | } |
| 186 | assign_alt_irq (cur_func, class_code); |
| 187 | rc = configure_bridge (&cur_func, slotno); |
| 188 | if (rc == -ENODEV) { |
| 189 | err ("You chose to insert Single Bridge, or nested bridges, this is not supported...\n"); |
| 190 | err ("Bus %x, devfunc %x\n", cur_func->busno, cur_func->device); |
| 191 | return rc; |
| 192 | } |
| 193 | if (rc) { |
| 194 | /* We need to do this in case some other BARs were properly inserted */ |
| 195 | err ("was not able to hot-add PPB properly.\n"); |
| 196 | func->bus = 1; /* To indicate to the unconfigure function that this is a PPB */ |
| 197 | cleanup_count = 2; |
| 198 | goto error; |
| 199 | } |
| 200 | |
| 201 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_SECONDARY_BUS, &sec_number); |
| 202 | flag = FALSE; |
| 203 | for (i = 0; i < 32; i++) { |
| 204 | if (func->devices[i]) { |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame^] | 205 | newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | if (!newfunc) { |
| 207 | err ("out of system memory\n"); |
| 208 | return -ENOMEM; |
| 209 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | newfunc->busno = sec_number; |
| 211 | newfunc->device = (u8) i; |
| 212 | for (j = 0; j < 4; j++) |
| 213 | newfunc->irq[j] = cur_func->irq[j]; |
| 214 | |
| 215 | if (flag) { |
| 216 | for (prev_func = cur_func; prev_func->next; prev_func = prev_func->next) ; |
| 217 | prev_func->next = newfunc; |
| 218 | } else |
| 219 | cur_func->next = newfunc; |
| 220 | |
| 221 | rc = ibmphp_configure_card (newfunc, slotno); |
| 222 | /* This could only happen if kmalloc failed */ |
| 223 | if (rc) { |
| 224 | /* We need to do this in case bridge itself got configured properly, but devices behind it failed */ |
| 225 | func->bus = 1; /* To indicate to the unconfigure function that this is a PPB */ |
| 226 | cleanup_count = 2; |
| 227 | goto error; |
| 228 | } |
| 229 | flag = TRUE; |
| 230 | } |
| 231 | } |
| 232 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame^] | 233 | newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | if (!newfunc) { |
| 235 | err ("out of system memory\n"); |
| 236 | return -ENOMEM; |
| 237 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | newfunc->busno = cur_func->busno; |
| 239 | newfunc->device = device; |
| 240 | for (j = 0; j < 4; j++) |
| 241 | newfunc->irq[j] = cur_func->irq[j]; |
| 242 | for (prev_func = cur_func; prev_func->next; prev_func = prev_func->next) ; |
| 243 | prev_func->next = newfunc; |
| 244 | cur_func = newfunc; |
| 245 | break; |
| 246 | case PCI_HEADER_TYPE_BRIDGE: |
| 247 | class >>= 8; |
| 248 | debug ("class now is %x\n", class); |
| 249 | if (class != PCI_CLASS_BRIDGE_PCI) { |
| 250 | err ("This %x is not PCI-to-PCI bridge, and as is not supported for hot-plugging. " |
| 251 | "Please insert another card.\n", cur_func->device); |
| 252 | return -ENODEV; |
| 253 | } |
| 254 | |
| 255 | assign_alt_irq (cur_func, class_code); |
| 256 | |
| 257 | debug ("cur_func->busno b4 configure_bridge is %x\n", cur_func->busno); |
| 258 | rc = configure_bridge (&cur_func, slotno); |
| 259 | if (rc == -ENODEV) { |
| 260 | err ("You chose to insert Single Bridge, or nested bridges, this is not supported...\n"); |
| 261 | err ("Bus %x, devfunc %x\n", cur_func->busno, cur_func->device); |
| 262 | return rc; |
| 263 | } |
| 264 | if (rc) { |
| 265 | /* We need to do this in case some other BARs were properly inserted */ |
| 266 | func->bus = 1; /* To indicate to the unconfigure function that this is a PPB */ |
| 267 | err ("was not able to hot-add PPB properly.\n"); |
| 268 | cleanup_count = 2; |
| 269 | goto error; |
| 270 | } |
| 271 | debug ("cur_func->busno = %x, device = %x, function = %x\n", |
| 272 | cur_func->busno, device, function); |
| 273 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_SECONDARY_BUS, &sec_number); |
| 274 | debug ("after configuring bridge..., sec_number = %x\n", sec_number); |
| 275 | flag = FALSE; |
| 276 | for (i = 0; i < 32; i++) { |
| 277 | if (func->devices[i]) { |
| 278 | debug ("inside for loop, device is %x\n", i); |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame^] | 279 | newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | if (!newfunc) { |
| 281 | err (" out of system memory\n"); |
| 282 | return -ENOMEM; |
| 283 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | newfunc->busno = sec_number; |
| 285 | newfunc->device = (u8) i; |
| 286 | for (j = 0; j < 4; j++) |
| 287 | newfunc->irq[j] = cur_func->irq[j]; |
| 288 | |
| 289 | if (flag) { |
| 290 | for (prev_func = cur_func; prev_func->next; prev_func = prev_func->next) ; |
| 291 | prev_func->next = newfunc; |
| 292 | } else |
| 293 | cur_func->next = newfunc; |
| 294 | |
| 295 | rc = ibmphp_configure_card (newfunc, slotno); |
| 296 | |
| 297 | /* Again, this case should not happen... For complete paranoia, will need to call remove_bus */ |
| 298 | if (rc) { |
| 299 | /* We need to do this in case some other BARs were properly inserted */ |
| 300 | func->bus = 1; /* To indicate to the unconfigure function that this is a PPB */ |
| 301 | cleanup_count = 2; |
| 302 | goto error; |
| 303 | } |
| 304 | flag = TRUE; |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | function = 0x8; |
| 309 | break; |
| 310 | default: |
| 311 | err ("MAJOR PROBLEM!!!!, header type not supported? %x\n", hdr_type); |
| 312 | return -ENXIO; |
| 313 | break; |
| 314 | } /* end of switch */ |
| 315 | } /* end of valid device */ |
| 316 | } /* end of for */ |
| 317 | |
| 318 | if (!valid_device) { |
| 319 | err ("Cannot find any valid devices on the card. Or unable to read from card.\n"); |
| 320 | return -ENODEV; |
| 321 | } |
| 322 | |
| 323 | return 0; |
| 324 | |
| 325 | error: |
| 326 | for (i = 0; i < cleanup_count; i++) { |
| 327 | if (cur_func->io[i]) { |
| 328 | ibmphp_remove_resource (cur_func->io[i]); |
| 329 | cur_func->io[i] = NULL; |
| 330 | } else if (cur_func->pfmem[i]) { |
| 331 | ibmphp_remove_resource (cur_func->pfmem[i]); |
| 332 | cur_func->pfmem[i] = NULL; |
| 333 | } else if (cur_func->mem[i]) { |
| 334 | ibmphp_remove_resource (cur_func->mem[i]); |
| 335 | cur_func->mem[i] = NULL; |
| 336 | } |
| 337 | } |
| 338 | return rc; |
| 339 | } |
| 340 | |
| 341 | /* |
| 342 | * This function configures the pci BARs of a single device. |
| 343 | * Input: pointer to the pci_func |
| 344 | * Output: configured PCI, 0, or error |
| 345 | */ |
| 346 | static int configure_device (struct pci_func *func) |
| 347 | { |
| 348 | u32 bar[6]; |
| 349 | u32 address[] = { |
| 350 | PCI_BASE_ADDRESS_0, |
| 351 | PCI_BASE_ADDRESS_1, |
| 352 | PCI_BASE_ADDRESS_2, |
| 353 | PCI_BASE_ADDRESS_3, |
| 354 | PCI_BASE_ADDRESS_4, |
| 355 | PCI_BASE_ADDRESS_5, |
| 356 | 0 |
| 357 | }; |
| 358 | u8 irq; |
| 359 | int count; |
| 360 | int len[6]; |
| 361 | struct resource_node *io[6]; |
| 362 | struct resource_node *mem[6]; |
| 363 | struct resource_node *mem_tmp; |
| 364 | struct resource_node *pfmem[6]; |
| 365 | unsigned int devfn; |
| 366 | |
| 367 | debug ("%s - inside\n", __FUNCTION__); |
| 368 | |
| 369 | devfn = PCI_DEVFN(func->device, func->function); |
| 370 | ibmphp_pci_bus->number = func->busno; |
| 371 | |
| 372 | for (count = 0; address[count]; count++) { /* for 6 BARs */ |
| 373 | |
| 374 | /* not sure if i need this. per scott, said maybe need smth like this |
| 375 | if devices don't adhere 100% to the spec, so don't want to write |
| 376 | to the reserved bits |
| 377 | |
| 378 | pcibios_read_config_byte(cur_func->busno, cur_func->device, |
| 379 | PCI_BASE_ADDRESS_0 + 4 * count, &tmp); |
| 380 | if (tmp & 0x01) // IO |
| 381 | pcibios_write_config_dword(cur_func->busno, cur_func->device, |
| 382 | PCI_BASE_ADDRESS_0 + 4 * count, 0xFFFFFFFD); |
| 383 | else // Memory |
| 384 | pcibios_write_config_dword(cur_func->busno, cur_func->device, |
| 385 | PCI_BASE_ADDRESS_0 + 4 * count, 0xFFFFFFFF); |
| 386 | */ |
| 387 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0xFFFFFFFF); |
| 388 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &bar[count]); |
| 389 | |
| 390 | if (!bar[count]) /* This BAR is not implemented */ |
| 391 | continue; |
| 392 | |
| 393 | debug ("Device %x BAR %d wants %x\n", func->device, count, bar[count]); |
| 394 | |
| 395 | if (bar[count] & PCI_BASE_ADDRESS_SPACE_IO) { |
| 396 | /* This is IO */ |
| 397 | debug ("inside IO SPACE\n"); |
| 398 | |
| 399 | len[count] = bar[count] & 0xFFFFFFFC; |
| 400 | len[count] = ~len[count] + 1; |
| 401 | |
| 402 | debug ("len[count] in IO %x, count %d\n", len[count], count); |
| 403 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame^] | 404 | io[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | |
| 406 | if (!io[count]) { |
| 407 | err ("out of system memory\n"); |
| 408 | return -ENOMEM; |
| 409 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | io[count]->type = IO; |
| 411 | io[count]->busno = func->busno; |
| 412 | io[count]->devfunc = PCI_DEVFN(func->device, func->function); |
| 413 | io[count]->len = len[count]; |
| 414 | if (ibmphp_check_resource(io[count], 0) == 0) { |
| 415 | ibmphp_add_resource (io[count]); |
| 416 | func->io[count] = io[count]; |
| 417 | } else { |
| 418 | err ("cannot allocate requested io for bus %x device %x function %x len %x\n", |
| 419 | func->busno, func->device, func->function, len[count]); |
| 420 | kfree (io[count]); |
| 421 | return -EIO; |
| 422 | } |
| 423 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], func->io[count]->start); |
| 424 | |
| 425 | /* _______________This is for debugging purposes only_____________________ */ |
| 426 | debug ("b4 writing, the IO address is %x\n", func->io[count]->start); |
| 427 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &bar[count]); |
| 428 | debug ("after writing.... the start address is %x\n", bar[count]); |
| 429 | /* _________________________________________________________________________*/ |
| 430 | |
| 431 | } else { |
| 432 | /* This is Memory */ |
| 433 | if (bar[count] & PCI_BASE_ADDRESS_MEM_PREFETCH) { |
| 434 | /* pfmem */ |
| 435 | debug ("PFMEM SPACE\n"); |
| 436 | |
| 437 | len[count] = bar[count] & 0xFFFFFFF0; |
| 438 | len[count] = ~len[count] + 1; |
| 439 | |
| 440 | debug ("len[count] in PFMEM %x, count %d\n", len[count], count); |
| 441 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame^] | 442 | pfmem[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | if (!pfmem[count]) { |
| 444 | err ("out of system memory\n"); |
| 445 | return -ENOMEM; |
| 446 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | pfmem[count]->type = PFMEM; |
| 448 | pfmem[count]->busno = func->busno; |
| 449 | pfmem[count]->devfunc = PCI_DEVFN(func->device, |
| 450 | func->function); |
| 451 | pfmem[count]->len = len[count]; |
| 452 | pfmem[count]->fromMem = FALSE; |
| 453 | if (ibmphp_check_resource (pfmem[count], 0) == 0) { |
| 454 | ibmphp_add_resource (pfmem[count]); |
| 455 | func->pfmem[count] = pfmem[count]; |
| 456 | } else { |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame^] | 457 | mem_tmp = kzalloc(sizeof(*mem_tmp), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | if (!mem_tmp) { |
| 459 | err ("out of system memory\n"); |
| 460 | kfree (pfmem[count]); |
| 461 | return -ENOMEM; |
| 462 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | mem_tmp->type = MEM; |
| 464 | mem_tmp->busno = pfmem[count]->busno; |
| 465 | mem_tmp->devfunc = pfmem[count]->devfunc; |
| 466 | mem_tmp->len = pfmem[count]->len; |
| 467 | debug ("there's no pfmem... going into mem.\n"); |
| 468 | if (ibmphp_check_resource (mem_tmp, 0) == 0) { |
| 469 | ibmphp_add_resource (mem_tmp); |
| 470 | pfmem[count]->fromMem = TRUE; |
| 471 | pfmem[count]->rangeno = mem_tmp->rangeno; |
| 472 | pfmem[count]->start = mem_tmp->start; |
| 473 | pfmem[count]->end = mem_tmp->end; |
| 474 | ibmphp_add_pfmem_from_mem (pfmem[count]); |
| 475 | func->pfmem[count] = pfmem[count]; |
| 476 | } else { |
| 477 | err ("cannot allocate requested pfmem for bus %x, device %x, len %x\n", |
| 478 | func->busno, func->device, len[count]); |
| 479 | kfree (mem_tmp); |
| 480 | kfree (pfmem[count]); |
| 481 | return -EIO; |
| 482 | } |
| 483 | } |
| 484 | |
| 485 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], func->pfmem[count]->start); |
| 486 | |
| 487 | /*_______________This is for debugging purposes only______________________________*/ |
| 488 | debug ("b4 writing, start address is %x\n", func->pfmem[count]->start); |
| 489 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &bar[count]); |
| 490 | debug ("after writing, start address is %x\n", bar[count]); |
| 491 | /*_________________________________________________________________________________*/ |
| 492 | |
| 493 | if (bar[count] & PCI_BASE_ADDRESS_MEM_TYPE_64) { /* takes up another dword */ |
| 494 | debug ("inside the mem 64 case, count %d\n", count); |
| 495 | count += 1; |
| 496 | /* on the 2nd dword, write all 0s, since we can't handle them n.e.ways */ |
| 497 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0x00000000); |
| 498 | } |
| 499 | } else { |
| 500 | /* regular memory */ |
| 501 | debug ("REGULAR MEM SPACE\n"); |
| 502 | |
| 503 | len[count] = bar[count] & 0xFFFFFFF0; |
| 504 | len[count] = ~len[count] + 1; |
| 505 | |
| 506 | debug ("len[count] in Mem %x, count %d\n", len[count], count); |
| 507 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame^] | 508 | mem[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | if (!mem[count]) { |
| 510 | err ("out of system memory\n"); |
| 511 | return -ENOMEM; |
| 512 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | mem[count]->type = MEM; |
| 514 | mem[count]->busno = func->busno; |
| 515 | mem[count]->devfunc = PCI_DEVFN(func->device, |
| 516 | func->function); |
| 517 | mem[count]->len = len[count]; |
| 518 | if (ibmphp_check_resource (mem[count], 0) == 0) { |
| 519 | ibmphp_add_resource (mem[count]); |
| 520 | func->mem[count] = mem[count]; |
| 521 | } else { |
| 522 | err ("cannot allocate requested mem for bus %x, device %x, len %x\n", |
| 523 | func->busno, func->device, len[count]); |
| 524 | kfree (mem[count]); |
| 525 | return -EIO; |
| 526 | } |
| 527 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], func->mem[count]->start); |
| 528 | /* _______________________This is for debugging purposes only _______________________*/ |
| 529 | debug ("b4 writing, start address is %x\n", func->mem[count]->start); |
| 530 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &bar[count]); |
| 531 | debug ("after writing, the address is %x\n", bar[count]); |
| 532 | /* __________________________________________________________________________________*/ |
| 533 | |
| 534 | if (bar[count] & PCI_BASE_ADDRESS_MEM_TYPE_64) { |
| 535 | /* takes up another dword */ |
| 536 | debug ("inside mem 64 case, reg. mem, count %d\n", count); |
| 537 | count += 1; |
| 538 | /* on the 2nd dword, write all 0s, since we can't handle them n.e.ways */ |
| 539 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0x00000000); |
| 540 | } |
| 541 | } |
| 542 | } /* end of mem */ |
| 543 | } /* end of for */ |
| 544 | |
| 545 | func->bus = 0; /* To indicate that this is not a PPB */ |
| 546 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_INTERRUPT_PIN, &irq); |
| 547 | if ((irq > 0x00) && (irq < 0x05)) |
| 548 | pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_INTERRUPT_LINE, func->irq[irq - 1]); |
| 549 | |
| 550 | pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_CACHE_LINE_SIZE, CACHE); |
| 551 | pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_LATENCY_TIMER, LATENCY); |
| 552 | |
Adam Kropelin | d648dac | 2005-09-16 19:28:17 -0700 | [diff] [blame] | 553 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, PCI_ROM_ADDRESS, 0x00L); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_COMMAND, DEVICEENABLE); |
| 555 | |
| 556 | return 0; |
| 557 | } |
| 558 | |
| 559 | /****************************************************************************** |
| 560 | * This routine configures a PCI-2-PCI bridge and the functions behind it |
| 561 | * Parameters: pci_func |
| 562 | * Returns: |
| 563 | ******************************************************************************/ |
| 564 | static int configure_bridge (struct pci_func **func_passed, u8 slotno) |
| 565 | { |
| 566 | int count; |
| 567 | int i; |
| 568 | int rc; |
| 569 | u8 sec_number; |
| 570 | u8 io_base; |
| 571 | u16 pfmem_base; |
| 572 | u32 bar[2]; |
| 573 | u32 len[2]; |
| 574 | u8 flag_io = FALSE; |
| 575 | u8 flag_mem = FALSE; |
| 576 | u8 flag_pfmem = FALSE; |
| 577 | u8 need_io_upper = FALSE; |
| 578 | u8 need_pfmem_upper = FALSE; |
| 579 | struct res_needed *amount_needed = NULL; |
| 580 | struct resource_node *io = NULL; |
| 581 | struct resource_node *bus_io[2] = {NULL, NULL}; |
| 582 | struct resource_node *mem = NULL; |
| 583 | struct resource_node *bus_mem[2] = {NULL, NULL}; |
| 584 | struct resource_node *mem_tmp = NULL; |
| 585 | struct resource_node *pfmem = NULL; |
| 586 | struct resource_node *bus_pfmem[2] = {NULL, NULL}; |
| 587 | struct bus_node *bus; |
| 588 | u32 address[] = { |
| 589 | PCI_BASE_ADDRESS_0, |
| 590 | PCI_BASE_ADDRESS_1, |
| 591 | 0 |
| 592 | }; |
| 593 | struct pci_func *func = *func_passed; |
| 594 | unsigned int devfn; |
| 595 | u8 irq; |
| 596 | int retval; |
| 597 | |
| 598 | debug ("%s - enter\n", __FUNCTION__); |
| 599 | |
| 600 | devfn = PCI_DEVFN(func->function, func->device); |
| 601 | ibmphp_pci_bus->number = func->busno; |
| 602 | |
| 603 | /* Configuring necessary info for the bridge so that we could see the devices |
| 604 | * behind it |
| 605 | */ |
| 606 | |
| 607 | pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_PRIMARY_BUS, func->busno); |
| 608 | |
| 609 | /* _____________________For debugging purposes only __________________________ |
| 610 | pci_bus_config_byte (ibmphp_pci_bus, devfn, PCI_PRIMARY_BUS, &pri_number); |
| 611 | debug ("primary # written into the bridge is %x\n", pri_number); |
| 612 | ___________________________________________________________________________*/ |
| 613 | |
| 614 | /* in EBDA, only get allocated 1 additional bus # per slot */ |
| 615 | sec_number = find_sec_number (func->busno, slotno); |
| 616 | if (sec_number == 0xff) { |
| 617 | err ("cannot allocate secondary bus number for the bridged device\n"); |
| 618 | return -EINVAL; |
| 619 | } |
| 620 | |
| 621 | debug ("after find_sec_number, the number we got is %x\n", sec_number); |
| 622 | debug ("AFTER FIND_SEC_NUMBER, func->busno IS %x\n", func->busno); |
| 623 | |
| 624 | pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_SECONDARY_BUS, sec_number); |
| 625 | |
| 626 | /* __________________For debugging purposes only __________________________________ |
| 627 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_SECONDARY_BUS, &sec_number); |
| 628 | debug ("sec_number after write/read is %x\n", sec_number); |
| 629 | ________________________________________________________________________________*/ |
| 630 | |
| 631 | pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_SUBORDINATE_BUS, sec_number); |
| 632 | |
| 633 | /* __________________For debugging purposes only ____________________________________ |
| 634 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_SUBORDINATE_BUS, &sec_number); |
| 635 | debug ("subordinate number after write/read is %x\n", sec_number); |
| 636 | __________________________________________________________________________________*/ |
| 637 | |
| 638 | pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_CACHE_LINE_SIZE, CACHE); |
| 639 | pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_LATENCY_TIMER, LATENCY); |
| 640 | pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_SEC_LATENCY_TIMER, LATENCY); |
| 641 | |
| 642 | debug ("func->busno is %x\n", func->busno); |
| 643 | debug ("sec_number after writing is %x\n", sec_number); |
| 644 | |
| 645 | |
| 646 | /* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
| 647 | !!!!!!!!!!!!!!!NEED TO ADD!!! FAST BACK-TO-BACK ENABLE!!!!!!!!!!!!!!!!!!!! |
| 648 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*/ |
| 649 | |
| 650 | |
| 651 | /* First we need to allocate mem/io for the bridge itself in case it needs it */ |
| 652 | for (count = 0; address[count]; count++) { /* for 2 BARs */ |
| 653 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0xFFFFFFFF); |
| 654 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &bar[count]); |
| 655 | |
| 656 | if (!bar[count]) { |
| 657 | /* This BAR is not implemented */ |
| 658 | debug ("so we come here then, eh?, count = %d\n", count); |
| 659 | continue; |
| 660 | } |
| 661 | // tmp_bar = bar[count]; |
| 662 | |
| 663 | debug ("Bar %d wants %x\n", count, bar[count]); |
| 664 | |
| 665 | if (bar[count] & PCI_BASE_ADDRESS_SPACE_IO) { |
| 666 | /* This is IO */ |
| 667 | len[count] = bar[count] & 0xFFFFFFFC; |
| 668 | len[count] = ~len[count] + 1; |
| 669 | |
| 670 | debug ("len[count] in IO = %x\n", len[count]); |
| 671 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame^] | 672 | bus_io[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | |
| 674 | if (!bus_io[count]) { |
| 675 | err ("out of system memory\n"); |
| 676 | retval = -ENOMEM; |
| 677 | goto error; |
| 678 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | bus_io[count]->type = IO; |
| 680 | bus_io[count]->busno = func->busno; |
| 681 | bus_io[count]->devfunc = PCI_DEVFN(func->device, |
| 682 | func->function); |
| 683 | bus_io[count]->len = len[count]; |
| 684 | if (ibmphp_check_resource (bus_io[count], 0) == 0) { |
| 685 | ibmphp_add_resource (bus_io[count]); |
| 686 | func->io[count] = bus_io[count]; |
| 687 | } else { |
| 688 | err ("cannot allocate requested io for bus %x, device %x, len %x\n", |
| 689 | func->busno, func->device, len[count]); |
| 690 | kfree (bus_io[count]); |
| 691 | return -EIO; |
| 692 | } |
| 693 | |
| 694 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], func->io[count]->start); |
| 695 | |
| 696 | } else { |
| 697 | /* This is Memory */ |
| 698 | if (bar[count] & PCI_BASE_ADDRESS_MEM_PREFETCH) { |
| 699 | /* pfmem */ |
| 700 | len[count] = bar[count] & 0xFFFFFFF0; |
| 701 | len[count] = ~len[count] + 1; |
| 702 | |
| 703 | debug ("len[count] in PFMEM = %x\n", len[count]); |
| 704 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame^] | 705 | bus_pfmem[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | if (!bus_pfmem[count]) { |
| 707 | err ("out of system memory\n"); |
| 708 | retval = -ENOMEM; |
| 709 | goto error; |
| 710 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | bus_pfmem[count]->type = PFMEM; |
| 712 | bus_pfmem[count]->busno = func->busno; |
| 713 | bus_pfmem[count]->devfunc = PCI_DEVFN(func->device, |
| 714 | func->function); |
| 715 | bus_pfmem[count]->len = len[count]; |
| 716 | bus_pfmem[count]->fromMem = FALSE; |
| 717 | if (ibmphp_check_resource (bus_pfmem[count], 0) == 0) { |
| 718 | ibmphp_add_resource (bus_pfmem[count]); |
| 719 | func->pfmem[count] = bus_pfmem[count]; |
| 720 | } else { |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame^] | 721 | mem_tmp = kzalloc(sizeof(*mem_tmp), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | if (!mem_tmp) { |
| 723 | err ("out of system memory\n"); |
| 724 | retval = -ENOMEM; |
| 725 | goto error; |
| 726 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | mem_tmp->type = MEM; |
| 728 | mem_tmp->busno = bus_pfmem[count]->busno; |
| 729 | mem_tmp->devfunc = bus_pfmem[count]->devfunc; |
| 730 | mem_tmp->len = bus_pfmem[count]->len; |
| 731 | if (ibmphp_check_resource (mem_tmp, 0) == 0) { |
| 732 | ibmphp_add_resource (mem_tmp); |
| 733 | bus_pfmem[count]->fromMem = TRUE; |
| 734 | bus_pfmem[count]->rangeno = mem_tmp->rangeno; |
| 735 | ibmphp_add_pfmem_from_mem (bus_pfmem[count]); |
| 736 | func->pfmem[count] = bus_pfmem[count]; |
| 737 | } else { |
| 738 | err ("cannot allocate requested pfmem for bus %x, device %x, len %x\n", |
| 739 | func->busno, func->device, len[count]); |
| 740 | kfree (mem_tmp); |
| 741 | kfree (bus_pfmem[count]); |
| 742 | return -EIO; |
| 743 | } |
| 744 | } |
| 745 | |
| 746 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], func->pfmem[count]->start); |
| 747 | |
| 748 | if (bar[count] & PCI_BASE_ADDRESS_MEM_TYPE_64) { |
| 749 | /* takes up another dword */ |
| 750 | count += 1; |
| 751 | /* on the 2nd dword, write all 0s, since we can't handle them n.e.ways */ |
| 752 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0x00000000); |
| 753 | |
| 754 | } |
| 755 | } else { |
| 756 | /* regular memory */ |
| 757 | len[count] = bar[count] & 0xFFFFFFF0; |
| 758 | len[count] = ~len[count] + 1; |
| 759 | |
| 760 | debug ("len[count] in Memory is %x\n", len[count]); |
| 761 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame^] | 762 | bus_mem[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | if (!bus_mem[count]) { |
| 764 | err ("out of system memory\n"); |
| 765 | retval = -ENOMEM; |
| 766 | goto error; |
| 767 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | bus_mem[count]->type = MEM; |
| 769 | bus_mem[count]->busno = func->busno; |
| 770 | bus_mem[count]->devfunc = PCI_DEVFN(func->device, |
| 771 | func->function); |
| 772 | bus_mem[count]->len = len[count]; |
| 773 | if (ibmphp_check_resource (bus_mem[count], 0) == 0) { |
| 774 | ibmphp_add_resource (bus_mem[count]); |
| 775 | func->mem[count] = bus_mem[count]; |
| 776 | } else { |
| 777 | err ("cannot allocate requested mem for bus %x, device %x, len %x\n", |
| 778 | func->busno, func->device, len[count]); |
| 779 | kfree (bus_mem[count]); |
| 780 | return -EIO; |
| 781 | } |
| 782 | |
| 783 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], func->mem[count]->start); |
| 784 | |
| 785 | if (bar[count] & PCI_BASE_ADDRESS_MEM_TYPE_64) { |
| 786 | /* takes up another dword */ |
| 787 | count += 1; |
| 788 | /* on the 2nd dword, write all 0s, since we can't handle them n.e.ways */ |
| 789 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0x00000000); |
| 790 | |
| 791 | } |
| 792 | } |
| 793 | } /* end of mem */ |
| 794 | } /* end of for */ |
| 795 | |
| 796 | /* Now need to see how much space the devices behind the bridge needed */ |
| 797 | amount_needed = scan_behind_bridge (func, sec_number); |
| 798 | if (amount_needed == NULL) |
| 799 | return -ENOMEM; |
| 800 | |
| 801 | ibmphp_pci_bus->number = func->busno; |
| 802 | debug ("after coming back from scan_behind_bridge\n"); |
| 803 | debug ("amount_needed->not_correct = %x\n", amount_needed->not_correct); |
| 804 | debug ("amount_needed->io = %x\n", amount_needed->io); |
| 805 | debug ("amount_needed->mem = %x\n", amount_needed->mem); |
| 806 | debug ("amount_needed->pfmem = %x\n", amount_needed->pfmem); |
| 807 | |
| 808 | if (amount_needed->not_correct) { |
| 809 | debug ("amount_needed is not correct\n"); |
| 810 | for (count = 0; address[count]; count++) { |
| 811 | /* for 2 BARs */ |
| 812 | if (bus_io[count]) { |
| 813 | ibmphp_remove_resource (bus_io[count]); |
| 814 | func->io[count] = NULL; |
| 815 | } else if (bus_pfmem[count]) { |
| 816 | ibmphp_remove_resource (bus_pfmem[count]); |
| 817 | func->pfmem[count] = NULL; |
| 818 | } else if (bus_mem[count]) { |
| 819 | ibmphp_remove_resource (bus_mem[count]); |
| 820 | func->mem[count] = NULL; |
| 821 | } |
| 822 | } |
| 823 | kfree (amount_needed); |
| 824 | return -ENODEV; |
| 825 | } |
| 826 | |
| 827 | if (!amount_needed->io) { |
| 828 | debug ("it doesn't want IO?\n"); |
| 829 | flag_io = TRUE; |
| 830 | } else { |
| 831 | debug ("it wants %x IO behind the bridge\n", amount_needed->io); |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame^] | 832 | io = kzalloc(sizeof(*io), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | |
| 834 | if (!io) { |
| 835 | err ("out of system memory\n"); |
| 836 | retval = -ENOMEM; |
| 837 | goto error; |
| 838 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | io->type = IO; |
| 840 | io->busno = func->busno; |
| 841 | io->devfunc = PCI_DEVFN(func->device, func->function); |
| 842 | io->len = amount_needed->io; |
| 843 | if (ibmphp_check_resource (io, 1) == 0) { |
| 844 | debug ("were we able to add io\n"); |
| 845 | ibmphp_add_resource (io); |
| 846 | flag_io = TRUE; |
| 847 | } |
| 848 | } |
| 849 | |
| 850 | if (!amount_needed->mem) { |
| 851 | debug ("it doesn't want n.e.memory?\n"); |
| 852 | flag_mem = TRUE; |
| 853 | } else { |
| 854 | debug ("it wants %x memory behind the bridge\n", amount_needed->mem); |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame^] | 855 | mem = kzalloc(sizeof(*mem), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | if (!mem) { |
| 857 | err ("out of system memory\n"); |
| 858 | retval = -ENOMEM; |
| 859 | goto error; |
| 860 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | mem->type = MEM; |
| 862 | mem->busno = func->busno; |
| 863 | mem->devfunc = PCI_DEVFN(func->device, func->function); |
| 864 | mem->len = amount_needed->mem; |
| 865 | if (ibmphp_check_resource (mem, 1) == 0) { |
| 866 | ibmphp_add_resource (mem); |
| 867 | flag_mem = TRUE; |
| 868 | debug ("were we able to add mem\n"); |
| 869 | } |
| 870 | } |
| 871 | |
| 872 | if (!amount_needed->pfmem) { |
| 873 | debug ("it doesn't want n.e.pfmem mem?\n"); |
| 874 | flag_pfmem = TRUE; |
| 875 | } else { |
| 876 | debug ("it wants %x pfmemory behind the bridge\n", amount_needed->pfmem); |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame^] | 877 | pfmem = kzalloc(sizeof(*pfmem), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | if (!pfmem) { |
| 879 | err ("out of system memory\n"); |
| 880 | retval = -ENOMEM; |
| 881 | goto error; |
| 882 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | pfmem->type = PFMEM; |
| 884 | pfmem->busno = func->busno; |
| 885 | pfmem->devfunc = PCI_DEVFN(func->device, func->function); |
| 886 | pfmem->len = amount_needed->pfmem; |
| 887 | pfmem->fromMem = FALSE; |
| 888 | if (ibmphp_check_resource (pfmem, 1) == 0) { |
| 889 | ibmphp_add_resource (pfmem); |
| 890 | flag_pfmem = TRUE; |
| 891 | } else { |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame^] | 892 | mem_tmp = kzalloc(sizeof(*mem_tmp), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | if (!mem_tmp) { |
| 894 | err ("out of system memory\n"); |
| 895 | retval = -ENOMEM; |
| 896 | goto error; |
| 897 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | mem_tmp->type = MEM; |
| 899 | mem_tmp->busno = pfmem->busno; |
| 900 | mem_tmp->devfunc = pfmem->devfunc; |
| 901 | mem_tmp->len = pfmem->len; |
| 902 | if (ibmphp_check_resource (mem_tmp, 1) == 0) { |
| 903 | ibmphp_add_resource (mem_tmp); |
| 904 | pfmem->fromMem = TRUE; |
| 905 | pfmem->rangeno = mem_tmp->rangeno; |
| 906 | ibmphp_add_pfmem_from_mem (pfmem); |
| 907 | flag_pfmem = TRUE; |
| 908 | } |
| 909 | } |
| 910 | } |
| 911 | |
| 912 | debug ("b4 if (flag_io && flag_mem && flag_pfmem)\n"); |
| 913 | debug ("flag_io = %x, flag_mem = %x, flag_pfmem = %x\n", flag_io, flag_mem, flag_pfmem); |
| 914 | |
| 915 | if (flag_io && flag_mem && flag_pfmem) { |
| 916 | /* If on bootup, there was a bridged card in this slot, |
| 917 | * then card was removed and ibmphp got unloaded and loaded |
| 918 | * back again, there's no way for us to remove the bus |
| 919 | * struct, so no need to kmalloc, can use existing node |
| 920 | */ |
| 921 | bus = ibmphp_find_res_bus (sec_number); |
| 922 | if (!bus) { |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame^] | 923 | bus = kzalloc(sizeof(*bus), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | if (!bus) { |
| 925 | err ("out of system memory\n"); |
| 926 | retval = -ENOMEM; |
| 927 | goto error; |
| 928 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | bus->busno = sec_number; |
| 930 | debug ("b4 adding new bus\n"); |
| 931 | rc = add_new_bus (bus, io, mem, pfmem, func->busno); |
| 932 | } else if (!(bus->rangeIO) && !(bus->rangeMem) && !(bus->rangePFMem)) |
| 933 | rc = add_new_bus (bus, io, mem, pfmem, 0xFF); |
| 934 | else { |
| 935 | err ("expected bus structure not empty?\n"); |
| 936 | retval = -EIO; |
| 937 | goto error; |
| 938 | } |
| 939 | if (rc) { |
| 940 | if (rc == -ENOMEM) { |
| 941 | ibmphp_remove_bus (bus, func->busno); |
| 942 | kfree (amount_needed); |
| 943 | return rc; |
| 944 | } |
| 945 | retval = rc; |
| 946 | goto error; |
| 947 | } |
| 948 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_IO_BASE, &io_base); |
| 949 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_BASE, &pfmem_base); |
| 950 | |
| 951 | if ((io_base & PCI_IO_RANGE_TYPE_MASK) == PCI_IO_RANGE_TYPE_32) { |
| 952 | debug ("io 32\n"); |
| 953 | need_io_upper = TRUE; |
| 954 | } |
Jordan, William P | 88d69a1 | 2005-11-21 22:51:57 -0800 | [diff] [blame] | 955 | if ((pfmem_base & PCI_PREF_RANGE_TYPE_MASK) == PCI_PREF_RANGE_TYPE_64) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | debug ("pfmem 64\n"); |
| 957 | need_pfmem_upper = TRUE; |
| 958 | } |
| 959 | |
| 960 | if (bus->noIORanges) { |
| 961 | pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_IO_BASE, 0x00 | bus->rangeIO->start >> 8); |
| 962 | pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_IO_LIMIT, 0x00 | bus->rangeIO->end >> 8); |
| 963 | |
| 964 | /* _______________This is for debugging purposes only ____________________ |
| 965 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_IO_BASE, &temp); |
| 966 | debug ("io_base = %x\n", (temp & PCI_IO_RANGE_TYPE_MASK) << 8); |
| 967 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_IO_LIMIT, &temp); |
| 968 | debug ("io_limit = %x\n", (temp & PCI_IO_RANGE_TYPE_MASK) << 8); |
| 969 | ________________________________________________________________________*/ |
| 970 | |
| 971 | if (need_io_upper) { /* since can't support n.e.ways */ |
| 972 | pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_IO_BASE_UPPER16, 0x0000); |
| 973 | pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_IO_LIMIT_UPPER16, 0x0000); |
| 974 | } |
| 975 | } else { |
| 976 | pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_IO_BASE, 0x00); |
| 977 | pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_IO_LIMIT, 0x00); |
| 978 | } |
| 979 | |
| 980 | if (bus->noMemRanges) { |
| 981 | pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_MEMORY_BASE, 0x0000 | bus->rangeMem->start >> 16); |
| 982 | pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_MEMORY_LIMIT, 0x0000 | bus->rangeMem->end >> 16); |
| 983 | |
| 984 | /* ____________________This is for debugging purposes only ________________________ |
| 985 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_MEMORY_BASE, &temp); |
| 986 | debug ("mem_base = %x\n", (temp & PCI_MEMORY_RANGE_TYPE_MASK) << 16); |
| 987 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_MEMORY_LIMIT, &temp); |
| 988 | debug ("mem_limit = %x\n", (temp & PCI_MEMORY_RANGE_TYPE_MASK) << 16); |
| 989 | __________________________________________________________________________________*/ |
| 990 | |
| 991 | } else { |
| 992 | pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_MEMORY_BASE, 0xffff); |
| 993 | pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_MEMORY_LIMIT, 0x0000); |
| 994 | } |
| 995 | if (bus->noPFMemRanges) { |
| 996 | pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_BASE, 0x0000 | bus->rangePFMem->start >> 16); |
| 997 | pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, 0x0000 | bus->rangePFMem->end >> 16); |
| 998 | |
| 999 | /* __________________________This is for debugging purposes only _______________________ |
| 1000 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_BASE, &temp); |
| 1001 | debug ("pfmem_base = %x", (temp & PCI_MEMORY_RANGE_TYPE_MASK) << 16); |
| 1002 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, &temp); |
| 1003 | debug ("pfmem_limit = %x\n", (temp & PCI_MEMORY_RANGE_TYPE_MASK) << 16); |
| 1004 | ______________________________________________________________________________________*/ |
| 1005 | |
| 1006 | if (need_pfmem_upper) { /* since can't support n.e.ways */ |
| 1007 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, PCI_PREF_BASE_UPPER32, 0x00000000); |
| 1008 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, PCI_PREF_LIMIT_UPPER32, 0x00000000); |
| 1009 | } |
| 1010 | } else { |
| 1011 | pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_BASE, 0xffff); |
| 1012 | pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, 0x0000); |
| 1013 | } |
| 1014 | |
| 1015 | debug ("b4 writing control information\n"); |
| 1016 | |
| 1017 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_INTERRUPT_PIN, &irq); |
| 1018 | if ((irq > 0x00) && (irq < 0x05)) |
| 1019 | pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_INTERRUPT_LINE, func->irq[irq - 1]); |
| 1020 | /* |
| 1021 | pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_BRIDGE_CONTROL, ctrl); |
| 1022 | pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_BRIDGE_CONTROL, PCI_BRIDGE_CTL_PARITY); |
| 1023 | pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_BRIDGE_CONTROL, PCI_BRIDGE_CTL_SERR); |
| 1024 | */ |
| 1025 | |
| 1026 | pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_COMMAND, DEVICEENABLE); |
| 1027 | pci_bus_write_config_word (ibmphp_pci_bus, devfn, PCI_BRIDGE_CONTROL, 0x07); |
| 1028 | for (i = 0; i < 32; i++) { |
| 1029 | if (amount_needed->devices[i]) { |
| 1030 | debug ("device where devices[i] is 1 = %x\n", i); |
| 1031 | func->devices[i] = 1; |
| 1032 | } |
| 1033 | } |
| 1034 | func->bus = 1; /* For unconfiguring, to indicate it's PPB */ |
| 1035 | func_passed = &func; |
| 1036 | debug ("func->busno b4 returning is %x\n", func->busno); |
| 1037 | debug ("func->busno b4 returning in the other structure is %x\n", (*func_passed)->busno); |
| 1038 | kfree (amount_needed); |
| 1039 | return 0; |
| 1040 | } else { |
| 1041 | err ("Configuring bridge was unsuccessful...\n"); |
| 1042 | mem_tmp = NULL; |
| 1043 | retval = -EIO; |
| 1044 | goto error; |
| 1045 | } |
| 1046 | |
| 1047 | error: |
| 1048 | kfree(amount_needed); |
| 1049 | if (pfmem) |
| 1050 | ibmphp_remove_resource (pfmem); |
| 1051 | if (io) |
| 1052 | ibmphp_remove_resource (io); |
| 1053 | if (mem) |
| 1054 | ibmphp_remove_resource (mem); |
| 1055 | for (i = 0; i < 2; i++) { /* for 2 BARs */ |
| 1056 | if (bus_io[i]) { |
| 1057 | ibmphp_remove_resource (bus_io[i]); |
| 1058 | func->io[i] = NULL; |
| 1059 | } else if (bus_pfmem[i]) { |
| 1060 | ibmphp_remove_resource (bus_pfmem[i]); |
| 1061 | func->pfmem[i] = NULL; |
| 1062 | } else if (bus_mem[i]) { |
| 1063 | ibmphp_remove_resource (bus_mem[i]); |
| 1064 | func->mem[i] = NULL; |
| 1065 | } |
| 1066 | } |
| 1067 | return retval; |
| 1068 | } |
| 1069 | |
| 1070 | /***************************************************************************** |
| 1071 | * This function adds up the amount of resources needed behind the PPB bridge |
| 1072 | * and passes it to the configure_bridge function |
| 1073 | * Input: bridge function |
| 1074 | * Ouput: amount of resources needed |
| 1075 | *****************************************************************************/ |
| 1076 | static struct res_needed *scan_behind_bridge (struct pci_func * func, u8 busno) |
| 1077 | { |
| 1078 | int count, len[6]; |
| 1079 | u16 vendor_id; |
| 1080 | u8 hdr_type; |
| 1081 | u8 device, function; |
| 1082 | unsigned int devfn; |
| 1083 | int howmany = 0; /*this is to see if there are any devices behind the bridge */ |
| 1084 | |
| 1085 | u32 bar[6], class; |
| 1086 | u32 address[] = { |
| 1087 | PCI_BASE_ADDRESS_0, |
| 1088 | PCI_BASE_ADDRESS_1, |
| 1089 | PCI_BASE_ADDRESS_2, |
| 1090 | PCI_BASE_ADDRESS_3, |
| 1091 | PCI_BASE_ADDRESS_4, |
| 1092 | PCI_BASE_ADDRESS_5, |
| 1093 | 0 |
| 1094 | }; |
| 1095 | struct res_needed *amount; |
| 1096 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame^] | 1097 | amount = kzalloc(sizeof(*amount), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | if (amount == NULL) |
| 1099 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | |
| 1101 | ibmphp_pci_bus->number = busno; |
| 1102 | |
| 1103 | debug ("the bus_no behind the bridge is %x\n", busno); |
| 1104 | debug ("scanning devices behind the bridge...\n"); |
| 1105 | for (device = 0; device < 32; device++) { |
| 1106 | amount->devices[device] = 0; |
| 1107 | for (function = 0; function < 8; function++) { |
| 1108 | devfn = PCI_DEVFN(device, function); |
| 1109 | |
| 1110 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_VENDOR_ID, &vendor_id); |
| 1111 | |
| 1112 | if (vendor_id != PCI_VENDOR_ID_NOTVALID) { |
| 1113 | /* found correct device!!! */ |
| 1114 | howmany++; |
| 1115 | |
| 1116 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_HEADER_TYPE, &hdr_type); |
| 1117 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, PCI_CLASS_REVISION, &class); |
| 1118 | |
| 1119 | debug ("hdr_type behind the bridge is %x\n", hdr_type); |
| 1120 | if (hdr_type & PCI_HEADER_TYPE_BRIDGE) { |
| 1121 | err ("embedded bridges not supported for hot-plugging.\n"); |
| 1122 | amount->not_correct = TRUE; |
| 1123 | return amount; |
| 1124 | } |
| 1125 | |
| 1126 | class >>= 8; /* to take revision out, class = class.subclass.prog i/f */ |
| 1127 | if (class == PCI_CLASS_NOT_DEFINED_VGA) { |
| 1128 | err ("The device %x is VGA compatible and as is not supported for hot plugging. " |
| 1129 | "Please choose another device.\n", device); |
| 1130 | amount->not_correct = TRUE; |
| 1131 | return amount; |
| 1132 | } else if (class == PCI_CLASS_DISPLAY_VGA) { |
| 1133 | err ("The device %x is not supported for hot plugging. " |
| 1134 | "Please choose another device.\n", device); |
| 1135 | amount->not_correct = TRUE; |
| 1136 | return amount; |
| 1137 | } |
| 1138 | |
| 1139 | amount->devices[device] = 1; |
| 1140 | |
| 1141 | for (count = 0; address[count]; count++) { |
| 1142 | /* for 6 BARs */ |
| 1143 | /* |
| 1144 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, address[count], &tmp); |
| 1145 | if (tmp & 0x01) // IO |
| 1146 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0xFFFFFFFD); |
| 1147 | else // MEMORY |
| 1148 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0xFFFFFFFF); |
| 1149 | */ |
| 1150 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0xFFFFFFFF); |
| 1151 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &bar[count]); |
| 1152 | |
| 1153 | debug ("what is bar[count]? %x, count = %d\n", bar[count], count); |
| 1154 | |
| 1155 | if (!bar[count]) /* This BAR is not implemented */ |
| 1156 | continue; |
| 1157 | |
| 1158 | //tmp_bar = bar[count]; |
| 1159 | |
| 1160 | debug ("count %d device %x function %x wants %x resources\n", count, device, function, bar[count]); |
| 1161 | |
| 1162 | if (bar[count] & PCI_BASE_ADDRESS_SPACE_IO) { |
| 1163 | /* This is IO */ |
| 1164 | len[count] = bar[count] & 0xFFFFFFFC; |
| 1165 | len[count] = ~len[count] + 1; |
| 1166 | amount->io += len[count]; |
| 1167 | } else { |
| 1168 | /* This is Memory */ |
| 1169 | if (bar[count] & PCI_BASE_ADDRESS_MEM_PREFETCH) { |
| 1170 | /* pfmem */ |
| 1171 | len[count] = bar[count] & 0xFFFFFFF0; |
| 1172 | len[count] = ~len[count] + 1; |
| 1173 | amount->pfmem += len[count]; |
| 1174 | if (bar[count] & PCI_BASE_ADDRESS_MEM_TYPE_64) |
| 1175 | /* takes up another dword */ |
| 1176 | count += 1; |
| 1177 | |
| 1178 | } else { |
| 1179 | /* regular memory */ |
| 1180 | len[count] = bar[count] & 0xFFFFFFF0; |
| 1181 | len[count] = ~len[count] + 1; |
| 1182 | amount->mem += len[count]; |
| 1183 | if (bar[count] & PCI_BASE_ADDRESS_MEM_TYPE_64) { |
| 1184 | /* takes up another dword */ |
| 1185 | count += 1; |
| 1186 | } |
| 1187 | } |
| 1188 | } |
| 1189 | } /* end for */ |
| 1190 | } /* end if (valid) */ |
| 1191 | } /* end for */ |
| 1192 | } /* end for */ |
| 1193 | |
| 1194 | if (!howmany) |
| 1195 | amount->not_correct = TRUE; |
| 1196 | else |
| 1197 | amount->not_correct = FALSE; |
| 1198 | if ((amount->io) && (amount->io < IOBRIDGE)) |
| 1199 | amount->io = IOBRIDGE; |
| 1200 | if ((amount->mem) && (amount->mem < MEMBRIDGE)) |
| 1201 | amount->mem = MEMBRIDGE; |
| 1202 | if ((amount->pfmem) && (amount->pfmem < MEMBRIDGE)) |
| 1203 | amount->pfmem = MEMBRIDGE; |
| 1204 | return amount; |
| 1205 | } |
| 1206 | |
| 1207 | /* The following 3 unconfigure_boot_ routines deal with the case when we had the card |
| 1208 | * upon bootup in the system, since we don't allocate func to such case, we need to read |
| 1209 | * the start addresses from pci config space and then find the corresponding entries in |
| 1210 | * our resource lists. The functions return either 0, -ENODEV, or -1 (general failure) |
| 1211 | * Change: we also call these functions even if we configured the card ourselves (i.e., not |
| 1212 | * the bootup case), since it should work same way |
| 1213 | */ |
| 1214 | static int unconfigure_boot_device (u8 busno, u8 device, u8 function) |
| 1215 | { |
| 1216 | u32 start_address; |
| 1217 | u32 address[] = { |
| 1218 | PCI_BASE_ADDRESS_0, |
| 1219 | PCI_BASE_ADDRESS_1, |
| 1220 | PCI_BASE_ADDRESS_2, |
| 1221 | PCI_BASE_ADDRESS_3, |
| 1222 | PCI_BASE_ADDRESS_4, |
| 1223 | PCI_BASE_ADDRESS_5, |
| 1224 | 0 |
| 1225 | }; |
| 1226 | int count; |
| 1227 | struct resource_node *io; |
| 1228 | struct resource_node *mem; |
| 1229 | struct resource_node *pfmem; |
| 1230 | struct bus_node *bus; |
| 1231 | u32 end_address; |
| 1232 | u32 temp_end; |
| 1233 | u32 size; |
| 1234 | u32 tmp_address; |
| 1235 | unsigned int devfn; |
| 1236 | |
| 1237 | debug ("%s - enter\n", __FUNCTION__); |
| 1238 | |
| 1239 | bus = ibmphp_find_res_bus (busno); |
| 1240 | if (!bus) { |
| 1241 | debug ("cannot find corresponding bus.\n"); |
| 1242 | return -EINVAL; |
| 1243 | } |
| 1244 | |
| 1245 | devfn = PCI_DEVFN(device, function); |
| 1246 | ibmphp_pci_bus->number = busno; |
| 1247 | for (count = 0; address[count]; count++) { /* for 6 BARs */ |
| 1248 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &start_address); |
| 1249 | |
| 1250 | /* We can do this here, b/c by that time the device driver of the card has been stopped */ |
| 1251 | |
| 1252 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0xFFFFFFFF); |
| 1253 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &size); |
| 1254 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], start_address); |
| 1255 | |
| 1256 | debug ("start_address is %x\n", start_address); |
| 1257 | debug ("busno, device, function %x %x %x\n", busno, device, function); |
| 1258 | if (!size) { |
| 1259 | /* This BAR is not implemented */ |
| 1260 | debug ("is this bar no implemented?, count = %d\n", count); |
| 1261 | continue; |
| 1262 | } |
| 1263 | tmp_address = start_address; |
| 1264 | if (start_address & PCI_BASE_ADDRESS_SPACE_IO) { |
| 1265 | /* This is IO */ |
| 1266 | start_address &= PCI_BASE_ADDRESS_IO_MASK; |
| 1267 | size = size & 0xFFFFFFFC; |
| 1268 | size = ~size + 1; |
| 1269 | end_address = start_address + size - 1; |
| 1270 | if (ibmphp_find_resource (bus, start_address, &io, IO) < 0) { |
| 1271 | err ("cannot find corresponding IO resource to remove\n"); |
| 1272 | return -EIO; |
| 1273 | } |
| 1274 | debug ("io->start = %x\n", io->start); |
| 1275 | temp_end = io->end; |
| 1276 | start_address = io->end + 1; |
| 1277 | ibmphp_remove_resource (io); |
| 1278 | /* This is needed b/c of the old I/O restrictions in the BIOS */ |
| 1279 | while (temp_end < end_address) { |
| 1280 | if (ibmphp_find_resource (bus, start_address, &io, IO) < 0) { |
| 1281 | err ("cannot find corresponding IO resource to remove\n"); |
| 1282 | return -EIO; |
| 1283 | } |
| 1284 | debug ("io->start = %x\n", io->start); |
| 1285 | temp_end = io->end; |
| 1286 | start_address = io->end + 1; |
| 1287 | ibmphp_remove_resource (io); |
| 1288 | } |
| 1289 | |
| 1290 | /* ????????? DO WE NEED TO WRITE ANYTHING INTO THE PCI CONFIG SPACE BACK ?????????? */ |
| 1291 | } else { |
| 1292 | /* This is Memory */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | if (start_address & PCI_BASE_ADDRESS_MEM_PREFETCH) { |
| 1294 | /* pfmem */ |
| 1295 | debug ("start address of pfmem is %x\n", start_address); |
Rolf Eike Beer | 034ecc7 | 2005-04-11 15:01:54 +0200 | [diff] [blame] | 1296 | start_address &= PCI_BASE_ADDRESS_MEM_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | |
| 1298 | if (ibmphp_find_resource (bus, start_address, &pfmem, PFMEM) < 0) { |
| 1299 | err ("cannot find corresponding PFMEM resource to remove\n"); |
| 1300 | return -EIO; |
| 1301 | } |
| 1302 | if (pfmem) { |
| 1303 | debug ("pfmem->start = %x\n", pfmem->start); |
| 1304 | |
| 1305 | ibmphp_remove_resource(pfmem); |
| 1306 | } |
| 1307 | } else { |
| 1308 | /* regular memory */ |
| 1309 | debug ("start address of mem is %x\n", start_address); |
Rolf Eike Beer | 034ecc7 | 2005-04-11 15:01:54 +0200 | [diff] [blame] | 1310 | start_address &= PCI_BASE_ADDRESS_MEM_MASK; |
| 1311 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | if (ibmphp_find_resource (bus, start_address, &mem, MEM) < 0) { |
| 1313 | err ("cannot find corresponding MEM resource to remove\n"); |
| 1314 | return -EIO; |
| 1315 | } |
| 1316 | if (mem) { |
| 1317 | debug ("mem->start = %x\n", mem->start); |
| 1318 | |
| 1319 | ibmphp_remove_resource(mem); |
| 1320 | } |
| 1321 | } |
| 1322 | if (tmp_address & PCI_BASE_ADDRESS_MEM_TYPE_64) { |
| 1323 | /* takes up another dword */ |
| 1324 | count += 1; |
| 1325 | } |
| 1326 | } /* end of mem */ |
| 1327 | } /* end of for */ |
| 1328 | |
| 1329 | return 0; |
| 1330 | } |
| 1331 | |
| 1332 | static int unconfigure_boot_bridge (u8 busno, u8 device, u8 function) |
| 1333 | { |
| 1334 | int count; |
| 1335 | int bus_no, pri_no, sub_no, sec_no = 0; |
| 1336 | u32 start_address, tmp_address; |
| 1337 | u8 sec_number, sub_number, pri_number; |
| 1338 | struct resource_node *io = NULL; |
| 1339 | struct resource_node *mem = NULL; |
| 1340 | struct resource_node *pfmem = NULL; |
| 1341 | struct bus_node *bus; |
| 1342 | u32 address[] = { |
| 1343 | PCI_BASE_ADDRESS_0, |
| 1344 | PCI_BASE_ADDRESS_1, |
| 1345 | 0 |
| 1346 | }; |
| 1347 | unsigned int devfn; |
| 1348 | |
| 1349 | devfn = PCI_DEVFN(device, function); |
| 1350 | ibmphp_pci_bus->number = busno; |
| 1351 | bus_no = (int) busno; |
| 1352 | debug ("busno is %x\n", busno); |
| 1353 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_PRIMARY_BUS, &pri_number); |
| 1354 | debug ("%s - busno = %x, primary_number = %x\n", __FUNCTION__, busno, pri_number); |
| 1355 | |
| 1356 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_SECONDARY_BUS, &sec_number); |
| 1357 | debug ("sec_number is %x\n", sec_number); |
| 1358 | sec_no = (int) sec_number; |
| 1359 | pri_no = (int) pri_number; |
| 1360 | if (pri_no != bus_no) { |
| 1361 | err ("primary numbers in our structures and pci config space don't match.\n"); |
| 1362 | return -EINVAL; |
| 1363 | } |
| 1364 | |
| 1365 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_SUBORDINATE_BUS, &sub_number); |
| 1366 | sub_no = (int) sub_number; |
| 1367 | debug ("sub_no is %d, sec_no is %d\n", sub_no, sec_no); |
| 1368 | if (sec_no != sub_number) { |
| 1369 | err ("there're more buses behind this bridge. Hot removal is not supported. Please choose another card\n"); |
| 1370 | return -ENODEV; |
| 1371 | } |
| 1372 | |
| 1373 | bus = ibmphp_find_res_bus (sec_number); |
| 1374 | debug ("bus->busno is %x\n", bus->busno); |
| 1375 | debug ("sec_number is %x\n", sec_number); |
| 1376 | if (!bus) { |
| 1377 | err ("cannot find Bus structure for the bridged device\n"); |
| 1378 | return -EINVAL; |
| 1379 | } |
| 1380 | |
| 1381 | ibmphp_remove_bus (bus, busno); |
| 1382 | |
| 1383 | for (count = 0; address[count]; count++) { |
| 1384 | /* for 2 BARs */ |
| 1385 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &start_address); |
| 1386 | |
| 1387 | if (!start_address) { |
| 1388 | /* This BAR is not implemented */ |
| 1389 | continue; |
| 1390 | } |
| 1391 | |
| 1392 | tmp_address = start_address; |
| 1393 | |
| 1394 | if (start_address & PCI_BASE_ADDRESS_SPACE_IO) { |
| 1395 | /* This is IO */ |
| 1396 | start_address &= PCI_BASE_ADDRESS_IO_MASK; |
| 1397 | if (ibmphp_find_resource (bus, start_address, &io, IO) < 0) { |
| 1398 | err ("cannot find corresponding IO resource to remove\n"); |
| 1399 | return -EIO; |
| 1400 | } |
| 1401 | if (io) |
| 1402 | debug ("io->start = %x\n", io->start); |
| 1403 | |
| 1404 | ibmphp_remove_resource (io); |
| 1405 | |
| 1406 | /* ????????? DO WE NEED TO WRITE ANYTHING INTO THE PCI CONFIG SPACE BACK ?????????? */ |
| 1407 | } else { |
| 1408 | /* This is Memory */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1409 | if (start_address & PCI_BASE_ADDRESS_MEM_PREFETCH) { |
| 1410 | /* pfmem */ |
Rolf Eike Beer | 034ecc7 | 2005-04-11 15:01:54 +0200 | [diff] [blame] | 1411 | start_address &= PCI_BASE_ADDRESS_MEM_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | if (ibmphp_find_resource (bus, start_address, &pfmem, PFMEM) < 0) { |
| 1413 | err ("cannot find corresponding PFMEM resource to remove\n"); |
| 1414 | return -EINVAL; |
| 1415 | } |
| 1416 | if (pfmem) { |
| 1417 | debug ("pfmem->start = %x\n", pfmem->start); |
| 1418 | |
| 1419 | ibmphp_remove_resource(pfmem); |
| 1420 | } |
| 1421 | } else { |
| 1422 | /* regular memory */ |
Rolf Eike Beer | 034ecc7 | 2005-04-11 15:01:54 +0200 | [diff] [blame] | 1423 | start_address &= PCI_BASE_ADDRESS_MEM_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1424 | if (ibmphp_find_resource (bus, start_address, &mem, MEM) < 0) { |
| 1425 | err ("cannot find corresponding MEM resource to remove\n"); |
| 1426 | return -EINVAL; |
| 1427 | } |
| 1428 | if (mem) { |
| 1429 | debug ("mem->start = %x\n", mem->start); |
| 1430 | |
| 1431 | ibmphp_remove_resource(mem); |
| 1432 | } |
| 1433 | } |
| 1434 | if (tmp_address & PCI_BASE_ADDRESS_MEM_TYPE_64) { |
| 1435 | /* takes up another dword */ |
| 1436 | count += 1; |
| 1437 | } |
| 1438 | } /* end of mem */ |
| 1439 | } /* end of for */ |
| 1440 | debug ("%s - exiting, returning success\n", __FUNCTION__); |
| 1441 | return 0; |
| 1442 | } |
| 1443 | |
| 1444 | static int unconfigure_boot_card (struct slot *slot_cur) |
| 1445 | { |
| 1446 | u16 vendor_id; |
| 1447 | u32 class; |
| 1448 | u8 hdr_type; |
| 1449 | u8 device; |
| 1450 | u8 busno; |
| 1451 | u8 function; |
| 1452 | int rc; |
| 1453 | unsigned int devfn; |
| 1454 | u8 valid_device = 0x00; /* To see if we are ever able to find valid device and read it */ |
| 1455 | |
| 1456 | debug ("%s - enter\n", __FUNCTION__); |
| 1457 | |
| 1458 | device = slot_cur->device; |
| 1459 | busno = slot_cur->bus; |
| 1460 | |
| 1461 | debug ("b4 for loop, device is %x\n", device); |
| 1462 | /* For every function on the card */ |
| 1463 | for (function = 0x0; function < 0x08; function++) { |
| 1464 | devfn = PCI_DEVFN(device, function); |
| 1465 | ibmphp_pci_bus->number = busno; |
| 1466 | |
| 1467 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_VENDOR_ID, &vendor_id); |
| 1468 | |
| 1469 | if (vendor_id != PCI_VENDOR_ID_NOTVALID) { |
| 1470 | /* found correct device!!! */ |
| 1471 | ++valid_device; |
| 1472 | |
| 1473 | debug ("%s - found correct device\n", __FUNCTION__); |
| 1474 | |
| 1475 | /* header: x x x x x x x x |
| 1476 | * | |___________|=> 1=PPB bridge, 0=normal device, 2=CardBus Bridge |
| 1477 | * |_=> 0 = single function device, 1 = multi-function device |
| 1478 | */ |
| 1479 | |
| 1480 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_HEADER_TYPE, &hdr_type); |
| 1481 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, PCI_CLASS_REVISION, &class); |
| 1482 | |
| 1483 | debug ("hdr_type %x, class %x\n", hdr_type, class); |
| 1484 | class >>= 8; /* to take revision out, class = class.subclass.prog i/f */ |
| 1485 | if (class == PCI_CLASS_NOT_DEFINED_VGA) { |
| 1486 | err ("The device %x function %x is VGA compatible and is not supported for hot removing. " |
| 1487 | "Please choose another device.\n", device, function); |
| 1488 | return -ENODEV; |
| 1489 | } else if (class == PCI_CLASS_DISPLAY_VGA) { |
| 1490 | err ("The device %x function %x is not supported for hot removing. " |
| 1491 | "Please choose another device.\n", device, function); |
| 1492 | return -ENODEV; |
| 1493 | } |
| 1494 | |
| 1495 | switch (hdr_type) { |
| 1496 | case PCI_HEADER_TYPE_NORMAL: |
| 1497 | rc = unconfigure_boot_device (busno, device, function); |
| 1498 | if (rc) { |
| 1499 | err ("was not able to unconfigure device %x func %x on bus %x. bailing out...\n", |
| 1500 | device, function, busno); |
| 1501 | return rc; |
| 1502 | } |
| 1503 | function = 0x8; |
| 1504 | break; |
| 1505 | case PCI_HEADER_TYPE_MULTIDEVICE: |
| 1506 | rc = unconfigure_boot_device (busno, device, function); |
| 1507 | if (rc) { |
| 1508 | err ("was not able to unconfigure device %x func %x on bus %x. bailing out...\n", |
| 1509 | device, function, busno); |
| 1510 | return rc; |
| 1511 | } |
| 1512 | break; |
| 1513 | case PCI_HEADER_TYPE_BRIDGE: |
| 1514 | class >>= 8; |
| 1515 | if (class != PCI_CLASS_BRIDGE_PCI) { |
| 1516 | err ("This device %x function %x is not PCI-to-PCI bridge, " |
| 1517 | "and is not supported for hot-removing. " |
| 1518 | "Please try another card.\n", device, function); |
| 1519 | return -ENODEV; |
| 1520 | } |
| 1521 | rc = unconfigure_boot_bridge (busno, device, function); |
| 1522 | if (rc != 0) { |
| 1523 | err ("was not able to hot-remove PPB properly.\n"); |
| 1524 | return rc; |
| 1525 | } |
| 1526 | |
| 1527 | function = 0x8; |
| 1528 | break; |
| 1529 | case PCI_HEADER_TYPE_MULTIBRIDGE: |
| 1530 | class >>= 8; |
| 1531 | if (class != PCI_CLASS_BRIDGE_PCI) { |
| 1532 | err ("This device %x function %x is not PCI-to-PCI bridge, " |
| 1533 | "and is not supported for hot-removing. " |
| 1534 | "Please try another card.\n", device, function); |
| 1535 | return -ENODEV; |
| 1536 | } |
| 1537 | rc = unconfigure_boot_bridge (busno, device, function); |
| 1538 | if (rc != 0) { |
| 1539 | err ("was not able to hot-remove PPB properly.\n"); |
| 1540 | return rc; |
| 1541 | } |
| 1542 | break; |
| 1543 | default: |
| 1544 | err ("MAJOR PROBLEM!!!! Cannot read device's header\n"); |
| 1545 | return -1; |
| 1546 | break; |
| 1547 | } /* end of switch */ |
| 1548 | } /* end of valid device */ |
| 1549 | } /* end of for */ |
| 1550 | |
| 1551 | if (!valid_device) { |
| 1552 | err ("Could not find device to unconfigure. Or could not read the card.\n"); |
| 1553 | return -1; |
| 1554 | } |
| 1555 | return 0; |
| 1556 | } |
| 1557 | |
| 1558 | /* |
| 1559 | * free the resources of the card (multi, single, or bridged) |
| 1560 | * Parameters: slot, flag to say if this is for removing entire module or just |
| 1561 | * unconfiguring the device |
| 1562 | * TO DO: will probably need to add some code in case there was some resource, |
| 1563 | * to remove it... this is from when we have errors in the configure_card... |
| 1564 | * !!!!!!!!!!!!!!!!!!!!!!!!!FOR BUSES!!!!!!!!!!!! |
| 1565 | * Returns: 0, -1, -ENODEV |
| 1566 | */ |
| 1567 | int ibmphp_unconfigure_card (struct slot **slot_cur, int the_end) |
| 1568 | { |
| 1569 | int i; |
| 1570 | int count; |
| 1571 | int rc; |
| 1572 | struct slot *sl = *slot_cur; |
| 1573 | struct pci_func *cur_func = NULL; |
| 1574 | struct pci_func *temp_func; |
| 1575 | |
| 1576 | debug ("%s - enter\n", __FUNCTION__); |
| 1577 | |
| 1578 | if (!the_end) { |
| 1579 | /* Need to unconfigure the card */ |
| 1580 | rc = unconfigure_boot_card (sl); |
| 1581 | if ((rc == -ENODEV) || (rc == -EIO) || (rc == -EINVAL)) { |
| 1582 | /* In all other cases, will still need to get rid of func structure if it exists */ |
| 1583 | return rc; |
| 1584 | } |
| 1585 | } |
| 1586 | |
| 1587 | if (sl->func) { |
| 1588 | cur_func = sl->func; |
| 1589 | while (cur_func) { |
| 1590 | /* TO DO: WILL MOST LIKELY NEED TO GET RID OF THE BUS STRUCTURE FROM RESOURCES AS WELL */ |
| 1591 | if (cur_func->bus) { |
| 1592 | /* in other words, it's a PPB */ |
| 1593 | count = 2; |
| 1594 | } else { |
| 1595 | count = 6; |
| 1596 | } |
| 1597 | |
| 1598 | for (i = 0; i < count; i++) { |
| 1599 | if (cur_func->io[i]) { |
| 1600 | debug ("io[%d] exists\n", i); |
| 1601 | if (the_end > 0) |
| 1602 | ibmphp_remove_resource (cur_func->io[i]); |
| 1603 | cur_func->io[i] = NULL; |
| 1604 | } |
| 1605 | if (cur_func->mem[i]) { |
| 1606 | debug ("mem[%d] exists\n", i); |
| 1607 | if (the_end > 0) |
| 1608 | ibmphp_remove_resource (cur_func->mem[i]); |
| 1609 | cur_func->mem[i] = NULL; |
| 1610 | } |
| 1611 | if (cur_func->pfmem[i]) { |
| 1612 | debug ("pfmem[%d] exists\n", i); |
| 1613 | if (the_end > 0) |
| 1614 | ibmphp_remove_resource (cur_func->pfmem[i]); |
| 1615 | cur_func->pfmem[i] = NULL; |
| 1616 | } |
| 1617 | } |
| 1618 | |
| 1619 | temp_func = cur_func->next; |
| 1620 | kfree (cur_func); |
| 1621 | cur_func = temp_func; |
| 1622 | } |
| 1623 | } |
| 1624 | |
| 1625 | sl->func = NULL; |
| 1626 | *slot_cur = sl; |
| 1627 | debug ("%s - exit\n", __FUNCTION__); |
| 1628 | return 0; |
| 1629 | } |
| 1630 | |
| 1631 | /* |
| 1632 | * add a new bus resulting from hot-plugging a PPB bridge with devices |
| 1633 | * |
| 1634 | * Input: bus and the amount of resources needed (we know we can assign those, |
| 1635 | * since they've been checked already |
| 1636 | * Output: bus added to the correct spot |
| 1637 | * 0, -1, error |
| 1638 | */ |
| 1639 | static int add_new_bus (struct bus_node *bus, struct resource_node *io, struct resource_node *mem, struct resource_node *pfmem, u8 parent_busno) |
| 1640 | { |
| 1641 | struct range_node *io_range = NULL; |
| 1642 | struct range_node *mem_range = NULL; |
| 1643 | struct range_node *pfmem_range = NULL; |
| 1644 | struct bus_node *cur_bus = NULL; |
| 1645 | |
| 1646 | /* Trying to find the parent bus number */ |
| 1647 | if (parent_busno != 0xFF) { |
| 1648 | cur_bus = ibmphp_find_res_bus (parent_busno); |
| 1649 | if (!cur_bus) { |
| 1650 | err ("strange, cannot find bus which is supposed to be at the system... something is terribly wrong...\n"); |
| 1651 | return -ENODEV; |
| 1652 | } |
| 1653 | |
| 1654 | list_add (&bus->bus_list, &cur_bus->bus_list); |
| 1655 | } |
| 1656 | if (io) { |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame^] | 1657 | io_range = kzalloc(sizeof(*io_range), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1658 | if (!io_range) { |
| 1659 | err ("out of system memory\n"); |
| 1660 | return -ENOMEM; |
| 1661 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1662 | io_range->start = io->start; |
| 1663 | io_range->end = io->end; |
| 1664 | io_range->rangeno = 1; |
| 1665 | bus->noIORanges = 1; |
| 1666 | bus->rangeIO = io_range; |
| 1667 | } |
| 1668 | if (mem) { |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame^] | 1669 | mem_range = kzalloc(sizeof(*mem_range), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1670 | if (!mem_range) { |
| 1671 | err ("out of system memory\n"); |
| 1672 | return -ENOMEM; |
| 1673 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1674 | mem_range->start = mem->start; |
| 1675 | mem_range->end = mem->end; |
| 1676 | mem_range->rangeno = 1; |
| 1677 | bus->noMemRanges = 1; |
| 1678 | bus->rangeMem = mem_range; |
| 1679 | } |
| 1680 | if (pfmem) { |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame^] | 1681 | pfmem_range = kzalloc(sizeof(*pfmem_range), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1682 | if (!pfmem_range) { |
| 1683 | err ("out of system memory\n"); |
| 1684 | return -ENOMEM; |
| 1685 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1686 | pfmem_range->start = pfmem->start; |
| 1687 | pfmem_range->end = pfmem->end; |
| 1688 | pfmem_range->rangeno = 1; |
| 1689 | bus->noPFMemRanges = 1; |
| 1690 | bus->rangePFMem = pfmem_range; |
| 1691 | } |
| 1692 | return 0; |
| 1693 | } |
| 1694 | |
| 1695 | /* |
| 1696 | * find the 1st available bus number for PPB to set as its secondary bus |
| 1697 | * Parameters: bus_number of the primary bus |
| 1698 | * Returns: bus_number of the secondary bus or 0xff in case of failure |
| 1699 | */ |
| 1700 | static u8 find_sec_number (u8 primary_busno, u8 slotno) |
| 1701 | { |
| 1702 | int min, max; |
| 1703 | u8 busno; |
| 1704 | struct bus_info *bus; |
| 1705 | struct bus_node *bus_cur; |
| 1706 | |
| 1707 | bus = ibmphp_find_same_bus_num (primary_busno); |
| 1708 | if (!bus) { |
| 1709 | err ("cannot get slot range of the bus from the BIOS\n"); |
| 1710 | return 0xff; |
| 1711 | } |
| 1712 | max = bus->slot_max; |
| 1713 | min = bus->slot_min; |
| 1714 | if ((slotno > max) || (slotno < min)) { |
| 1715 | err ("got the wrong range\n"); |
| 1716 | return 0xff; |
| 1717 | } |
| 1718 | busno = (u8) (slotno - (u8) min); |
| 1719 | busno += primary_busno + 0x01; |
| 1720 | bus_cur = ibmphp_find_res_bus (busno); |
| 1721 | /* either there is no such bus number, or there are no ranges, which |
| 1722 | * can only happen if we removed the bridged device in previous load |
| 1723 | * of the driver, and now only have the skeleton bus struct |
| 1724 | */ |
| 1725 | if ((!bus_cur) || (!(bus_cur->rangeIO) && !(bus_cur->rangeMem) && !(bus_cur->rangePFMem))) |
| 1726 | return busno; |
| 1727 | return 0xff; |
| 1728 | } |
| 1729 | |