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1da177e4 LT |
1 | /* |
2 | * Compaq Hot Plug Controller Driver | |
3 | * | |
4 | * Copyright (C) 1995,2001 Compaq Computer Corporation | |
5 | * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) | |
6 | * Copyright (C) 2001 IBM Corp. | |
7 | * | |
8 | * All rights reserved. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or (at | |
13 | * your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
18 | * NON INFRINGEMENT. See the GNU General Public License for more | |
19 | * details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | * | |
25 | * Send feedback to <greg@kroah.com> | |
26 | * | |
27 | */ | |
28 | ||
1da177e4 LT |
29 | #include <linux/module.h> |
30 | #include <linux/kernel.h> | |
31 | #include <linux/types.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/workqueue.h> | |
34 | #include <linux/proc_fs.h> | |
35 | #include <linux/pci.h> | |
7a54f25c | 36 | #include <linux/pci_hotplug.h> |
1da177e4 LT |
37 | #include "../pci.h" |
38 | #include "cpqphp.h" | |
39 | #include "cpqphp_nvram.h" | |
fb9aa6f1 | 40 | #include "../../../arch/x86/pci/pci.h" /* horrible hack showing how processor dependent we are... */ |
1da177e4 LT |
41 | |
42 | ||
43 | u8 cpqhp_nic_irq; | |
44 | u8 cpqhp_disk_irq; | |
45 | ||
46 | static u16 unused_IRQ; | |
47 | ||
48 | /* | |
49 | * detect_HRT_floating_pointer | |
50 | * | |
51 | * find the Hot Plug Resource Table in the specified region of memory. | |
52 | * | |
53 | */ | |
54 | static void __iomem *detect_HRT_floating_pointer(void __iomem *begin, void __iomem *end) | |
55 | { | |
56 | void __iomem *fp; | |
57 | void __iomem *endp; | |
58 | u8 temp1, temp2, temp3, temp4; | |
59 | int status = 0; | |
60 | ||
61 | endp = (end - sizeof(struct hrt) + 1); | |
62 | ||
63 | for (fp = begin; fp <= endp; fp += 16) { | |
64 | temp1 = readb(fp + SIG0); | |
65 | temp2 = readb(fp + SIG1); | |
66 | temp3 = readb(fp + SIG2); | |
67 | temp4 = readb(fp + SIG3); | |
68 | if (temp1 == '$' && | |
69 | temp2 == 'H' && | |
70 | temp3 == 'R' && | |
71 | temp4 == 'T') { | |
72 | status = 1; | |
73 | break; | |
74 | } | |
75 | } | |
76 | ||
77 | if (!status) | |
78 | fp = NULL; | |
79 | ||
80 | dbg("Discovered Hotplug Resource Table at %p\n", fp); | |
81 | return fp; | |
82 | } | |
83 | ||
84 | ||
85 | int cpqhp_configure_device (struct controller* ctrl, struct pci_func* func) | |
86 | { | |
87 | unsigned char bus; | |
88 | struct pci_bus *child; | |
89 | int num; | |
90 | ||
91 | if (func->pci_dev == NULL) | |
92 | func->pci_dev = pci_find_slot(func->bus, PCI_DEVFN(func->device, func->function)); | |
93 | ||
94 | /* No pci device, we need to create it then */ | |
95 | if (func->pci_dev == NULL) { | |
96 | dbg("INFO: pci_dev still null\n"); | |
97 | ||
98 | num = pci_scan_slot(ctrl->pci_dev->bus, PCI_DEVFN(func->device, func->function)); | |
99 | if (num) | |
100 | pci_bus_add_devices(ctrl->pci_dev->bus); | |
101 | ||
102 | func->pci_dev = pci_find_slot(func->bus, PCI_DEVFN(func->device, func->function)); | |
103 | if (func->pci_dev == NULL) { | |
104 | dbg("ERROR: pci_dev still null\n"); | |
105 | return 0; | |
106 | } | |
107 | } | |
108 | ||
109 | if (func->pci_dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) { | |
110 | pci_read_config_byte(func->pci_dev, PCI_SECONDARY_BUS, &bus); | |
111 | child = (struct pci_bus*) pci_add_new_bus(func->pci_dev->bus, (func->pci_dev), bus); | |
112 | pci_do_scan_bus(child); | |
113 | } | |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
118 | ||
119 | int cpqhp_unconfigure_device(struct pci_func* func) | |
120 | { | |
121 | int j; | |
122 | ||
66bef8c0 | 123 | dbg("%s: bus/dev/func = %x/%x/%x\n", __func__, func->bus, func->device, func->function); |
1da177e4 LT |
124 | |
125 | for (j=0; j<8 ; j++) { | |
126 | struct pci_dev* temp = pci_find_slot(func->bus, PCI_DEVFN(func->device, j)); | |
127 | if (temp) | |
128 | pci_remove_bus_device(temp); | |
129 | } | |
130 | return 0; | |
131 | } | |
132 | ||
133 | static int PCI_RefinedAccessConfig(struct pci_bus *bus, unsigned int devfn, u8 offset, u32 *value) | |
134 | { | |
135 | u32 vendID = 0; | |
136 | ||
137 | if (pci_bus_read_config_dword (bus, devfn, PCI_VENDOR_ID, &vendID) == -1) | |
138 | return -1; | |
139 | if (vendID == 0xffffffff) | |
140 | return -1; | |
141 | return pci_bus_read_config_dword (bus, devfn, offset, value); | |
142 | } | |
143 | ||
144 | ||
145 | /* | |
146 | * cpqhp_set_irq | |
147 | * | |
148 | * @bus_num: bus number of PCI device | |
149 | * @dev_num: device number of PCI device | |
150 | * @slot: pointer to u8 where slot number will be returned | |
151 | */ | |
152 | int cpqhp_set_irq (u8 bus_num, u8 dev_num, u8 int_pin, u8 irq_num) | |
153 | { | |
154 | int rc = 0; | |
155 | ||
156 | if (cpqhp_legacy_mode) { | |
157 | struct pci_dev *fakedev; | |
158 | struct pci_bus *fakebus; | |
159 | u16 temp_word; | |
160 | ||
161 | fakedev = kmalloc(sizeof(*fakedev), GFP_KERNEL); | |
162 | fakebus = kmalloc(sizeof(*fakebus), GFP_KERNEL); | |
163 | if (!fakedev || !fakebus) { | |
164 | kfree(fakedev); | |
165 | kfree(fakebus); | |
166 | return -ENOMEM; | |
167 | } | |
168 | ||
169 | fakedev->devfn = dev_num << 3; | |
170 | fakedev->bus = fakebus; | |
171 | fakebus->number = bus_num; | |
172 | dbg("%s: dev %d, bus %d, pin %d, num %d\n", | |
66bef8c0 | 173 | __func__, dev_num, bus_num, int_pin, irq_num); |
1da177e4 LT |
174 | rc = pcibios_set_irq_routing(fakedev, int_pin - 0x0a, irq_num); |
175 | kfree(fakedev); | |
176 | kfree(fakebus); | |
66bef8c0 | 177 | dbg("%s: rc %d\n", __func__, rc); |
1da177e4 LT |
178 | if (!rc) |
179 | return !rc; | |
180 | ||
181 | // set the Edge Level Control Register (ELCR) | |
182 | temp_word = inb(0x4d0); | |
183 | temp_word |= inb(0x4d1) << 8; | |
184 | ||
185 | temp_word |= 0x01 << irq_num; | |
186 | ||
187 | // This should only be for x86 as it sets the Edge Level Control Register | |
188 | outb((u8) (temp_word & 0xFF), 0x4d0); | |
189 | outb((u8) ((temp_word & 0xFF00) >> 8), 0x4d1); | |
190 | rc = 0; | |
191 | } | |
192 | ||
193 | return rc; | |
194 | } | |
195 | ||
196 | ||
197 | /* | |
198 | * WTF??? This function isn't in the code, yet a function calls it, but the | |
199 | * compiler optimizes it away? strange. Here as a placeholder to keep the | |
200 | * compiler happy. | |
201 | */ | |
202 | static int PCI_ScanBusNonBridge (u8 bus, u8 device) | |
203 | { | |
204 | return 0; | |
205 | } | |
206 | ||
207 | static int PCI_ScanBusForNonBridge(struct controller *ctrl, u8 bus_num, u8 * dev_num) | |
208 | { | |
209 | u16 tdevice; | |
210 | u32 work; | |
211 | u8 tbus; | |
212 | ||
213 | ctrl->pci_bus->number = bus_num; | |
214 | ||
215 | for (tdevice = 0; tdevice < 0xFF; tdevice++) { | |
216 | //Scan for access first | |
217 | if (PCI_RefinedAccessConfig(ctrl->pci_bus, tdevice, 0x08, &work) == -1) | |
218 | continue; | |
219 | dbg("Looking for nonbridge bus_num %d dev_num %d\n", bus_num, tdevice); | |
220 | //Yep we got one. Not a bridge ? | |
221 | if ((work >> 8) != PCI_TO_PCI_BRIDGE_CLASS) { | |
222 | *dev_num = tdevice; | |
223 | dbg("found it !\n"); | |
224 | return 0; | |
225 | } | |
226 | } | |
227 | for (tdevice = 0; tdevice < 0xFF; tdevice++) { | |
228 | //Scan for access first | |
229 | if (PCI_RefinedAccessConfig(ctrl->pci_bus, tdevice, 0x08, &work) == -1) | |
230 | continue; | |
231 | dbg("Looking for bridge bus_num %d dev_num %d\n", bus_num, tdevice); | |
232 | //Yep we got one. bridge ? | |
233 | if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) { | |
234 | pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(tdevice, 0), PCI_SECONDARY_BUS, &tbus); | |
235 | dbg("Recurse on bus_num %d tdevice %d\n", tbus, tdevice); | |
236 | if (PCI_ScanBusNonBridge(tbus, tdevice) == 0) | |
237 | return 0; | |
238 | } | |
239 | } | |
240 | ||
241 | return -1; | |
242 | } | |
243 | ||
244 | ||
245 | static int PCI_GetBusDevHelper(struct controller *ctrl, u8 *bus_num, u8 *dev_num, u8 slot, u8 nobridge) | |
246 | { | |
247 | struct irq_routing_table *PCIIRQRoutingInfoLength; | |
248 | long len; | |
249 | long loop; | |
250 | u32 work; | |
251 | ||
252 | u8 tbus, tdevice, tslot; | |
253 | ||
254 | PCIIRQRoutingInfoLength = pcibios_get_irq_routing_table(); | |
255 | if (!PCIIRQRoutingInfoLength) | |
256 | return -1; | |
257 | ||
258 | len = (PCIIRQRoutingInfoLength->size - | |
259 | sizeof(struct irq_routing_table)) / sizeof(struct irq_info); | |
260 | // Make sure I got at least one entry | |
261 | if (len == 0) { | |
6044ec88 | 262 | kfree(PCIIRQRoutingInfoLength ); |
1da177e4 LT |
263 | return -1; |
264 | } | |
265 | ||
266 | for (loop = 0; loop < len; ++loop) { | |
267 | tbus = PCIIRQRoutingInfoLength->slots[loop].bus; | |
268 | tdevice = PCIIRQRoutingInfoLength->slots[loop].devfn; | |
269 | tslot = PCIIRQRoutingInfoLength->slots[loop].slot; | |
270 | ||
271 | if (tslot == slot) { | |
272 | *bus_num = tbus; | |
273 | *dev_num = tdevice; | |
274 | ctrl->pci_bus->number = tbus; | |
275 | pci_bus_read_config_dword (ctrl->pci_bus, *dev_num, PCI_VENDOR_ID, &work); | |
276 | if (!nobridge || (work == 0xffffffff)) { | |
6044ec88 | 277 | kfree(PCIIRQRoutingInfoLength ); |
1da177e4 LT |
278 | return 0; |
279 | } | |
280 | ||
281 | dbg("bus_num %d devfn %d\n", *bus_num, *dev_num); | |
282 | pci_bus_read_config_dword (ctrl->pci_bus, *dev_num, PCI_CLASS_REVISION, &work); | |
283 | dbg("work >> 8 (%x) = BRIDGE (%x)\n", work >> 8, PCI_TO_PCI_BRIDGE_CLASS); | |
284 | ||
285 | if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) { | |
286 | pci_bus_read_config_byte (ctrl->pci_bus, *dev_num, PCI_SECONDARY_BUS, &tbus); | |
287 | dbg("Scan bus for Non Bridge: bus %d\n", tbus); | |
288 | if (PCI_ScanBusForNonBridge(ctrl, tbus, dev_num) == 0) { | |
289 | *bus_num = tbus; | |
6044ec88 | 290 | kfree(PCIIRQRoutingInfoLength ); |
1da177e4 LT |
291 | return 0; |
292 | } | |
293 | } else { | |
6044ec88 | 294 | kfree(PCIIRQRoutingInfoLength ); |
1da177e4 LT |
295 | return 0; |
296 | } | |
297 | ||
298 | } | |
299 | } | |
6044ec88 | 300 | kfree(PCIIRQRoutingInfoLength ); |
1da177e4 LT |
301 | return -1; |
302 | } | |
303 | ||
304 | ||
305 | int cpqhp_get_bus_dev (struct controller *ctrl, u8 * bus_num, u8 * dev_num, u8 slot) | |
306 | { | |
307 | return PCI_GetBusDevHelper(ctrl, bus_num, dev_num, slot, 0); //plain (bridges allowed) | |
308 | } | |
309 | ||
310 | ||
311 | /* More PCI configuration routines; this time centered around hotplug controller */ | |
312 | ||
313 | ||
314 | /* | |
315 | * cpqhp_save_config | |
316 | * | |
317 | * Reads configuration for all slots in a PCI bus and saves info. | |
318 | * | |
319 | * Note: For non-hot plug busses, the slot # saved is the device # | |
320 | * | |
321 | * returns 0 if success | |
322 | */ | |
323 | int cpqhp_save_config(struct controller *ctrl, int busnumber, int is_hot_plug) | |
324 | { | |
325 | long rc; | |
326 | u8 class_code; | |
327 | u8 header_type; | |
328 | u32 ID; | |
329 | u8 secondary_bus; | |
330 | struct pci_func *new_slot; | |
331 | int sub_bus; | |
332 | int FirstSupported; | |
333 | int LastSupported; | |
334 | int max_functions; | |
335 | int function; | |
336 | u8 DevError; | |
337 | int device = 0; | |
338 | int cloop = 0; | |
339 | int stop_it; | |
340 | int index; | |
341 | ||
342 | // Decide which slots are supported | |
343 | ||
344 | if (is_hot_plug) { | |
345 | //********************************* | |
346 | // is_hot_plug is the slot mask | |
347 | //********************************* | |
348 | FirstSupported = is_hot_plug >> 4; | |
349 | LastSupported = FirstSupported + (is_hot_plug & 0x0F) - 1; | |
350 | } else { | |
351 | FirstSupported = 0; | |
352 | LastSupported = 0x1F; | |
353 | } | |
354 | ||
355 | // Save PCI configuration space for all devices in supported slots | |
356 | ctrl->pci_bus->number = busnumber; | |
357 | for (device = FirstSupported; device <= LastSupported; device++) { | |
358 | ID = 0xFFFFFFFF; | |
359 | rc = pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(device, 0), PCI_VENDOR_ID, &ID); | |
360 | ||
361 | if (ID != 0xFFFFFFFF) { // device in slot | |
362 | rc = pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(device, 0), 0x0B, &class_code); | |
363 | if (rc) | |
364 | return rc; | |
365 | ||
366 | rc = pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(device, 0), PCI_HEADER_TYPE, &header_type); | |
367 | if (rc) | |
368 | return rc; | |
369 | ||
370 | // If multi-function device, set max_functions to 8 | |
371 | if (header_type & 0x80) | |
372 | max_functions = 8; | |
373 | else | |
374 | max_functions = 1; | |
375 | ||
376 | function = 0; | |
377 | ||
378 | do { | |
379 | DevError = 0; | |
380 | ||
381 | if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { // P-P Bridge | |
382 | // Recurse the subordinate bus | |
383 | // get the subordinate bus number | |
384 | rc = pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(device, function), PCI_SECONDARY_BUS, &secondary_bus); | |
385 | if (rc) { | |
386 | return rc; | |
387 | } else { | |
388 | sub_bus = (int) secondary_bus; | |
389 | ||
390 | // Save secondary bus cfg spc | |
391 | // with this recursive call. | |
392 | rc = cpqhp_save_config(ctrl, sub_bus, 0); | |
393 | if (rc) | |
394 | return rc; | |
395 | ctrl->pci_bus->number = busnumber; | |
396 | } | |
397 | } | |
398 | ||
399 | index = 0; | |
400 | new_slot = cpqhp_slot_find(busnumber, device, index++); | |
401 | while (new_slot && | |
402 | (new_slot->function != (u8) function)) | |
403 | new_slot = cpqhp_slot_find(busnumber, device, index++); | |
404 | ||
405 | if (!new_slot) { | |
406 | // Setup slot structure. | |
407 | new_slot = cpqhp_slot_create(busnumber); | |
408 | ||
409 | if (new_slot == NULL) | |
410 | return(1); | |
411 | } | |
412 | ||
413 | new_slot->bus = (u8) busnumber; | |
414 | new_slot->device = (u8) device; | |
415 | new_slot->function = (u8) function; | |
416 | new_slot->is_a_board = 1; | |
417 | new_slot->switch_save = 0x10; | |
418 | // In case of unsupported board | |
419 | new_slot->status = DevError; | |
420 | new_slot->pci_dev = pci_find_slot(new_slot->bus, (new_slot->device << 3) | new_slot->function); | |
421 | ||
422 | for (cloop = 0; cloop < 0x20; cloop++) { | |
423 | rc = pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(device, function), cloop << 2, (u32 *) & (new_slot-> config_space [cloop])); | |
424 | if (rc) | |
425 | return rc; | |
426 | } | |
427 | ||
428 | function++; | |
429 | ||
430 | stop_it = 0; | |
431 | ||
432 | // this loop skips to the next present function | |
433 | // reading in Class Code and Header type. | |
434 | ||
435 | while ((function < max_functions)&&(!stop_it)) { | |
436 | rc = pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(device, function), PCI_VENDOR_ID, &ID); | |
437 | if (ID == 0xFFFFFFFF) { // nothing there. | |
438 | function++; | |
439 | } else { // Something there | |
440 | rc = pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(device, function), 0x0B, &class_code); | |
441 | if (rc) | |
442 | return rc; | |
443 | ||
444 | rc = pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(device, function), PCI_HEADER_TYPE, &header_type); | |
445 | if (rc) | |
446 | return rc; | |
447 | ||
448 | stop_it++; | |
449 | } | |
450 | } | |
451 | ||
452 | } while (function < max_functions); | |
453 | } // End of IF (device in slot?) | |
454 | else if (is_hot_plug) { | |
455 | // Setup slot structure with entry for empty slot | |
456 | new_slot = cpqhp_slot_create(busnumber); | |
457 | ||
458 | if (new_slot == NULL) { | |
459 | return(1); | |
460 | } | |
461 | ||
462 | new_slot->bus = (u8) busnumber; | |
463 | new_slot->device = (u8) device; | |
464 | new_slot->function = 0; | |
465 | new_slot->is_a_board = 0; | |
466 | new_slot->presence_save = 0; | |
467 | new_slot->switch_save = 0; | |
468 | } | |
469 | } // End of FOR loop | |
470 | ||
471 | return(0); | |
472 | } | |
473 | ||
474 | ||
475 | /* | |
476 | * cpqhp_save_slot_config | |
477 | * | |
478 | * Saves configuration info for all PCI devices in a given slot | |
479 | * including subordinate busses. | |
480 | * | |
481 | * returns 0 if success | |
482 | */ | |
483 | int cpqhp_save_slot_config (struct controller *ctrl, struct pci_func * new_slot) | |
484 | { | |
485 | long rc; | |
486 | u8 class_code; | |
487 | u8 header_type; | |
488 | u32 ID; | |
489 | u8 secondary_bus; | |
490 | int sub_bus; | |
491 | int max_functions; | |
492 | int function; | |
493 | int cloop = 0; | |
494 | int stop_it; | |
495 | ||
496 | ID = 0xFFFFFFFF; | |
497 | ||
498 | ctrl->pci_bus->number = new_slot->bus; | |
499 | pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(new_slot->device, 0), PCI_VENDOR_ID, &ID); | |
500 | ||
501 | if (ID != 0xFFFFFFFF) { // device in slot | |
502 | pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(new_slot->device, 0), 0x0B, &class_code); | |
503 | pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(new_slot->device, 0), PCI_HEADER_TYPE, &header_type); | |
504 | ||
505 | if (header_type & 0x80) // Multi-function device | |
506 | max_functions = 8; | |
507 | else | |
508 | max_functions = 1; | |
509 | ||
510 | function = 0; | |
511 | ||
512 | do { | |
513 | if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { // PCI-PCI Bridge | |
514 | // Recurse the subordinate bus | |
515 | pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(new_slot->device, function), PCI_SECONDARY_BUS, &secondary_bus); | |
516 | ||
517 | sub_bus = (int) secondary_bus; | |
518 | ||
519 | // Save the config headers for the secondary bus. | |
520 | rc = cpqhp_save_config(ctrl, sub_bus, 0); | |
521 | if (rc) | |
522 | return(rc); | |
523 | ctrl->pci_bus->number = new_slot->bus; | |
524 | ||
525 | } // End of IF | |
526 | ||
527 | new_slot->status = 0; | |
528 | ||
529 | for (cloop = 0; cloop < 0x20; cloop++) { | |
530 | pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(new_slot->device, function), cloop << 2, (u32 *) & (new_slot-> config_space [cloop])); | |
531 | } | |
532 | ||
533 | function++; | |
534 | ||
535 | stop_it = 0; | |
536 | ||
537 | // this loop skips to the next present function | |
538 | // reading in the Class Code and the Header type. | |
539 | ||
540 | while ((function < max_functions) && (!stop_it)) { | |
541 | pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(new_slot->device, function), PCI_VENDOR_ID, &ID); | |
542 | ||
543 | if (ID == 0xFFFFFFFF) { // nothing there. | |
544 | function++; | |
545 | } else { // Something there | |
546 | pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(new_slot->device, function), 0x0B, &class_code); | |
547 | ||
548 | pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(new_slot->device, function), PCI_HEADER_TYPE, &header_type); | |
549 | ||
550 | stop_it++; | |
551 | } | |
552 | } | |
553 | ||
554 | } while (function < max_functions); | |
555 | } // End of IF (device in slot?) | |
556 | else { | |
557 | return 2; | |
558 | } | |
559 | ||
560 | return 0; | |
561 | } | |
562 | ||
563 | ||
564 | /* | |
565 | * cpqhp_save_base_addr_length | |
566 | * | |
567 | * Saves the length of all base address registers for the | |
568 | * specified slot. this is for hot plug REPLACE | |
569 | * | |
570 | * returns 0 if success | |
571 | */ | |
572 | int cpqhp_save_base_addr_length(struct controller *ctrl, struct pci_func * func) | |
573 | { | |
574 | u8 cloop; | |
575 | u8 header_type; | |
576 | u8 secondary_bus; | |
577 | u8 type; | |
578 | int sub_bus; | |
579 | u32 temp_register; | |
580 | u32 base; | |
581 | u32 rc; | |
582 | struct pci_func *next; | |
583 | int index = 0; | |
584 | struct pci_bus *pci_bus = ctrl->pci_bus; | |
585 | unsigned int devfn; | |
586 | ||
587 | func = cpqhp_slot_find(func->bus, func->device, index++); | |
588 | ||
589 | while (func != NULL) { | |
590 | pci_bus->number = func->bus; | |
591 | devfn = PCI_DEVFN(func->device, func->function); | |
592 | ||
593 | // Check for Bridge | |
594 | pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type); | |
595 | ||
596 | if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { | |
597 | // PCI-PCI Bridge | |
598 | pci_bus_read_config_byte (pci_bus, devfn, PCI_SECONDARY_BUS, &secondary_bus); | |
599 | ||
600 | sub_bus = (int) secondary_bus; | |
601 | ||
602 | next = cpqhp_slot_list[sub_bus]; | |
603 | ||
604 | while (next != NULL) { | |
605 | rc = cpqhp_save_base_addr_length(ctrl, next); | |
606 | if (rc) | |
607 | return rc; | |
608 | ||
609 | next = next->next; | |
610 | } | |
611 | pci_bus->number = func->bus; | |
612 | ||
613 | //FIXME: this loop is duplicated in the non-bridge case. The two could be rolled together | |
614 | // Figure out IO and memory base lengths | |
615 | for (cloop = 0x10; cloop <= 0x14; cloop += 4) { | |
616 | temp_register = 0xFFFFFFFF; | |
617 | pci_bus_write_config_dword (pci_bus, devfn, cloop, temp_register); | |
618 | pci_bus_read_config_dword (pci_bus, devfn, cloop, &base); | |
619 | ||
620 | if (base) { // If this register is implemented | |
621 | if (base & 0x01L) { | |
622 | // IO base | |
623 | // set base = amount of IO space requested | |
624 | base = base & 0xFFFFFFFE; | |
625 | base = (~base) + 1; | |
626 | ||
627 | type = 1; | |
628 | } else { | |
629 | // memory base | |
630 | base = base & 0xFFFFFFF0; | |
631 | base = (~base) + 1; | |
632 | ||
633 | type = 0; | |
634 | } | |
635 | } else { | |
636 | base = 0x0L; | |
637 | type = 0; | |
638 | } | |
639 | ||
640 | // Save information in slot structure | |
641 | func->base_length[(cloop - 0x10) >> 2] = | |
642 | base; | |
643 | func->base_type[(cloop - 0x10) >> 2] = type; | |
644 | ||
645 | } // End of base register loop | |
646 | ||
647 | ||
648 | } else if ((header_type & 0x7F) == 0x00) { // PCI-PCI Bridge | |
649 | // Figure out IO and memory base lengths | |
650 | for (cloop = 0x10; cloop <= 0x24; cloop += 4) { | |
651 | temp_register = 0xFFFFFFFF; | |
652 | pci_bus_write_config_dword (pci_bus, devfn, cloop, temp_register); | |
653 | pci_bus_read_config_dword (pci_bus, devfn, cloop, &base); | |
654 | ||
655 | if (base) { // If this register is implemented | |
656 | if (base & 0x01L) { | |
657 | // IO base | |
658 | // base = amount of IO space requested | |
659 | base = base & 0xFFFFFFFE; | |
660 | base = (~base) + 1; | |
661 | ||
662 | type = 1; | |
663 | } else { | |
664 | // memory base | |
665 | // base = amount of memory space requested | |
666 | base = base & 0xFFFFFFF0; | |
667 | base = (~base) + 1; | |
668 | ||
669 | type = 0; | |
670 | } | |
671 | } else { | |
672 | base = 0x0L; | |
673 | type = 0; | |
674 | } | |
675 | ||
676 | // Save information in slot structure | |
677 | func->base_length[(cloop - 0x10) >> 2] = base; | |
678 | func->base_type[(cloop - 0x10) >> 2] = type; | |
679 | ||
680 | } // End of base register loop | |
681 | ||
682 | } else { // Some other unknown header type | |
683 | } | |
684 | ||
685 | // find the next device in this slot | |
686 | func = cpqhp_slot_find(func->bus, func->device, index++); | |
687 | } | |
688 | ||
689 | return(0); | |
690 | } | |
691 | ||
692 | ||
693 | /* | |
694 | * cpqhp_save_used_resources | |
695 | * | |
696 | * Stores used resource information for existing boards. this is | |
697 | * for boards that were in the system when this driver was loaded. | |
698 | * this function is for hot plug ADD | |
699 | * | |
700 | * returns 0 if success | |
701 | */ | |
702 | int cpqhp_save_used_resources (struct controller *ctrl, struct pci_func * func) | |
703 | { | |
704 | u8 cloop; | |
705 | u8 header_type; | |
706 | u8 secondary_bus; | |
707 | u8 temp_byte; | |
708 | u8 b_base; | |
709 | u8 b_length; | |
710 | u16 command; | |
711 | u16 save_command; | |
712 | u16 w_base; | |
713 | u16 w_length; | |
714 | u32 temp_register; | |
715 | u32 save_base; | |
716 | u32 base; | |
717 | int index = 0; | |
718 | struct pci_resource *mem_node; | |
719 | struct pci_resource *p_mem_node; | |
720 | struct pci_resource *io_node; | |
721 | struct pci_resource *bus_node; | |
722 | struct pci_bus *pci_bus = ctrl->pci_bus; | |
723 | unsigned int devfn; | |
724 | ||
725 | func = cpqhp_slot_find(func->bus, func->device, index++); | |
726 | ||
727 | while ((func != NULL) && func->is_a_board) { | |
728 | pci_bus->number = func->bus; | |
729 | devfn = PCI_DEVFN(func->device, func->function); | |
730 | ||
731 | // Save the command register | |
732 | pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &save_command); | |
733 | ||
734 | // disable card | |
735 | command = 0x00; | |
736 | pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command); | |
737 | ||
738 | // Check for Bridge | |
739 | pci_bus_read_config_byte(pci_bus, devfn, PCI_HEADER_TYPE, &header_type); | |
740 | ||
741 | if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { // PCI-PCI Bridge | |
742 | // Clear Bridge Control Register | |
743 | command = 0x00; | |
744 | pci_bus_write_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, command); | |
745 | pci_bus_read_config_byte(pci_bus, devfn, PCI_SECONDARY_BUS, &secondary_bus); | |
746 | pci_bus_read_config_byte(pci_bus, devfn, PCI_SUBORDINATE_BUS, &temp_byte); | |
747 | ||
748 | bus_node = kmalloc(sizeof(*bus_node), GFP_KERNEL); | |
749 | if (!bus_node) | |
750 | return -ENOMEM; | |
751 | ||
752 | bus_node->base = secondary_bus; | |
753 | bus_node->length = temp_byte - secondary_bus + 1; | |
754 | ||
755 | bus_node->next = func->bus_head; | |
756 | func->bus_head = bus_node; | |
757 | ||
758 | // Save IO base and Limit registers | |
759 | pci_bus_read_config_byte(pci_bus, devfn, PCI_IO_BASE, &b_base); | |
760 | pci_bus_read_config_byte(pci_bus, devfn, PCI_IO_LIMIT, &b_length); | |
761 | ||
762 | if ((b_base <= b_length) && (save_command & 0x01)) { | |
763 | io_node = kmalloc(sizeof(*io_node), GFP_KERNEL); | |
764 | if (!io_node) | |
765 | return -ENOMEM; | |
766 | ||
767 | io_node->base = (b_base & 0xF0) << 8; | |
768 | io_node->length = (b_length - b_base + 0x10) << 8; | |
769 | ||
770 | io_node->next = func->io_head; | |
771 | func->io_head = io_node; | |
772 | } | |
773 | ||
774 | // Save memory base and Limit registers | |
775 | pci_bus_read_config_word(pci_bus, devfn, PCI_MEMORY_BASE, &w_base); | |
776 | pci_bus_read_config_word(pci_bus, devfn, PCI_MEMORY_LIMIT, &w_length); | |
777 | ||
778 | if ((w_base <= w_length) && (save_command & 0x02)) { | |
779 | mem_node = kmalloc(sizeof(*mem_node), GFP_KERNEL); | |
780 | if (!mem_node) | |
781 | return -ENOMEM; | |
782 | ||
783 | mem_node->base = w_base << 16; | |
784 | mem_node->length = (w_length - w_base + 0x10) << 16; | |
785 | ||
786 | mem_node->next = func->mem_head; | |
787 | func->mem_head = mem_node; | |
788 | } | |
789 | ||
790 | // Save prefetchable memory base and Limit registers | |
791 | pci_bus_read_config_word(pci_bus, devfn, PCI_PREF_MEMORY_BASE, &w_base); | |
792 | pci_bus_read_config_word(pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, &w_length); | |
793 | ||
794 | if ((w_base <= w_length) && (save_command & 0x02)) { | |
795 | p_mem_node = kmalloc(sizeof(*p_mem_node), GFP_KERNEL); | |
796 | if (!p_mem_node) | |
797 | return -ENOMEM; | |
798 | ||
799 | p_mem_node->base = w_base << 16; | |
800 | p_mem_node->length = (w_length - w_base + 0x10) << 16; | |
801 | ||
802 | p_mem_node->next = func->p_mem_head; | |
803 | func->p_mem_head = p_mem_node; | |
804 | } | |
805 | // Figure out IO and memory base lengths | |
806 | for (cloop = 0x10; cloop <= 0x14; cloop += 4) { | |
807 | pci_bus_read_config_dword (pci_bus, devfn, cloop, &save_base); | |
808 | ||
809 | temp_register = 0xFFFFFFFF; | |
810 | pci_bus_write_config_dword(pci_bus, devfn, cloop, temp_register); | |
811 | pci_bus_read_config_dword(pci_bus, devfn, cloop, &base); | |
812 | ||
813 | temp_register = base; | |
814 | ||
815 | if (base) { // If this register is implemented | |
816 | if (((base & 0x03L) == 0x01) | |
817 | && (save_command & 0x01)) { | |
818 | // IO base | |
819 | // set temp_register = amount of IO space requested | |
820 | temp_register = base & 0xFFFFFFFE; | |
821 | temp_register = (~temp_register) + 1; | |
822 | ||
823 | io_node = kmalloc(sizeof(*io_node), | |
824 | GFP_KERNEL); | |
825 | if (!io_node) | |
826 | return -ENOMEM; | |
827 | ||
828 | io_node->base = | |
829 | save_base & (~0x03L); | |
830 | io_node->length = temp_register; | |
831 | ||
832 | io_node->next = func->io_head; | |
833 | func->io_head = io_node; | |
834 | } else | |
835 | if (((base & 0x0BL) == 0x08) | |
836 | && (save_command & 0x02)) { | |
837 | // prefetchable memory base | |
838 | temp_register = base & 0xFFFFFFF0; | |
839 | temp_register = (~temp_register) + 1; | |
840 | ||
841 | p_mem_node = kmalloc(sizeof(*p_mem_node), | |
842 | GFP_KERNEL); | |
843 | if (!p_mem_node) | |
844 | return -ENOMEM; | |
845 | ||
846 | p_mem_node->base = save_base & (~0x0FL); | |
847 | p_mem_node->length = temp_register; | |
848 | ||
849 | p_mem_node->next = func->p_mem_head; | |
850 | func->p_mem_head = p_mem_node; | |
851 | } else | |
852 | if (((base & 0x0BL) == 0x00) | |
853 | && (save_command & 0x02)) { | |
854 | // prefetchable memory base | |
855 | temp_register = base & 0xFFFFFFF0; | |
856 | temp_register = (~temp_register) + 1; | |
857 | ||
858 | mem_node = kmalloc(sizeof(*mem_node), | |
859 | GFP_KERNEL); | |
860 | if (!mem_node) | |
861 | return -ENOMEM; | |
862 | ||
863 | mem_node->base = save_base & (~0x0FL); | |
864 | mem_node->length = temp_register; | |
865 | ||
866 | mem_node->next = func->mem_head; | |
867 | func->mem_head = mem_node; | |
868 | } else | |
869 | return(1); | |
870 | } | |
871 | } // End of base register loop | |
872 | } else if ((header_type & 0x7F) == 0x00) { // Standard header | |
873 | // Figure out IO and memory base lengths | |
874 | for (cloop = 0x10; cloop <= 0x24; cloop += 4) { | |
875 | pci_bus_read_config_dword(pci_bus, devfn, cloop, &save_base); | |
876 | ||
877 | temp_register = 0xFFFFFFFF; | |
878 | pci_bus_write_config_dword(pci_bus, devfn, cloop, temp_register); | |
879 | pci_bus_read_config_dword(pci_bus, devfn, cloop, &base); | |
880 | ||
881 | temp_register = base; | |
882 | ||
883 | if (base) { // If this register is implemented | |
884 | if (((base & 0x03L) == 0x01) | |
885 | && (save_command & 0x01)) { | |
886 | // IO base | |
887 | // set temp_register = amount of IO space requested | |
888 | temp_register = base & 0xFFFFFFFE; | |
889 | temp_register = (~temp_register) + 1; | |
890 | ||
891 | io_node = kmalloc(sizeof(*io_node), | |
892 | GFP_KERNEL); | |
893 | if (!io_node) | |
894 | return -ENOMEM; | |
895 | ||
896 | io_node->base = save_base & (~0x01L); | |
897 | io_node->length = temp_register; | |
898 | ||
899 | io_node->next = func->io_head; | |
900 | func->io_head = io_node; | |
901 | } else | |
902 | if (((base & 0x0BL) == 0x08) | |
903 | && (save_command & 0x02)) { | |
904 | // prefetchable memory base | |
905 | temp_register = base & 0xFFFFFFF0; | |
906 | temp_register = (~temp_register) + 1; | |
907 | ||
908 | p_mem_node = kmalloc(sizeof(*p_mem_node), | |
909 | GFP_KERNEL); | |
910 | if (!p_mem_node) | |
911 | return -ENOMEM; | |
912 | ||
913 | p_mem_node->base = save_base & (~0x0FL); | |
914 | p_mem_node->length = temp_register; | |
915 | ||
916 | p_mem_node->next = func->p_mem_head; | |
917 | func->p_mem_head = p_mem_node; | |
918 | } else | |
919 | if (((base & 0x0BL) == 0x00) | |
920 | && (save_command & 0x02)) { | |
921 | // prefetchable memory base | |
922 | temp_register = base & 0xFFFFFFF0; | |
923 | temp_register = (~temp_register) + 1; | |
924 | ||
925 | mem_node = kmalloc(sizeof(*mem_node), | |
926 | GFP_KERNEL); | |
927 | if (!mem_node) | |
928 | return -ENOMEM; | |
929 | ||
930 | mem_node->base = save_base & (~0x0FL); | |
931 | mem_node->length = temp_register; | |
932 | ||
933 | mem_node->next = func->mem_head; | |
934 | func->mem_head = mem_node; | |
935 | } else | |
936 | return(1); | |
937 | } | |
938 | } // End of base register loop | |
939 | } else { // Some other unknown header type | |
940 | } | |
941 | ||
942 | // find the next device in this slot | |
943 | func = cpqhp_slot_find(func->bus, func->device, index++); | |
944 | } | |
945 | ||
946 | return(0); | |
947 | } | |
948 | ||
949 | ||
950 | /* | |
951 | * cpqhp_configure_board | |
952 | * | |
953 | * Copies saved configuration information to one slot. | |
954 | * this is called recursively for bridge devices. | |
955 | * this is for hot plug REPLACE! | |
956 | * | |
957 | * returns 0 if success | |
958 | */ | |
959 | int cpqhp_configure_board(struct controller *ctrl, struct pci_func * func) | |
960 | { | |
961 | int cloop; | |
962 | u8 header_type; | |
963 | u8 secondary_bus; | |
964 | int sub_bus; | |
965 | struct pci_func *next; | |
966 | u32 temp; | |
967 | u32 rc; | |
968 | int index = 0; | |
969 | struct pci_bus *pci_bus = ctrl->pci_bus; | |
970 | unsigned int devfn; | |
971 | ||
972 | func = cpqhp_slot_find(func->bus, func->device, index++); | |
973 | ||
974 | while (func != NULL) { | |
975 | pci_bus->number = func->bus; | |
976 | devfn = PCI_DEVFN(func->device, func->function); | |
977 | ||
978 | // Start at the top of config space so that the control | |
979 | // registers are programmed last | |
980 | for (cloop = 0x3C; cloop > 0; cloop -= 4) { | |
981 | pci_bus_write_config_dword (pci_bus, devfn, cloop, func->config_space[cloop >> 2]); | |
982 | } | |
983 | ||
984 | pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type); | |
985 | ||
986 | // If this is a bridge device, restore subordinate devices | |
987 | if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { // PCI-PCI Bridge | |
988 | pci_bus_read_config_byte (pci_bus, devfn, PCI_SECONDARY_BUS, &secondary_bus); | |
989 | ||
990 | sub_bus = (int) secondary_bus; | |
991 | ||
992 | next = cpqhp_slot_list[sub_bus]; | |
993 | ||
994 | while (next != NULL) { | |
995 | rc = cpqhp_configure_board(ctrl, next); | |
996 | if (rc) | |
997 | return rc; | |
998 | ||
999 | next = next->next; | |
1000 | } | |
1001 | } else { | |
1002 | ||
1003 | // Check all the base Address Registers to make sure | |
1004 | // they are the same. If not, the board is different. | |
1005 | ||
1006 | for (cloop = 16; cloop < 40; cloop += 4) { | |
1007 | pci_bus_read_config_dword (pci_bus, devfn, cloop, &temp); | |
1008 | ||
1009 | if (temp != func->config_space[cloop >> 2]) { | |
1010 | dbg("Config space compare failure!!! offset = %x\n", cloop); | |
1011 | dbg("bus = %x, device = %x, function = %x\n", func->bus, func->device, func->function); | |
1012 | dbg("temp = %x, config space = %x\n\n", temp, func->config_space[cloop >> 2]); | |
1013 | return 1; | |
1014 | } | |
1015 | } | |
1016 | } | |
1017 | ||
1018 | func->configured = 1; | |
1019 | ||
1020 | func = cpqhp_slot_find(func->bus, func->device, index++); | |
1021 | } | |
1022 | ||
1023 | return 0; | |
1024 | } | |
1025 | ||
1026 | ||
1027 | /* | |
1028 | * cpqhp_valid_replace | |
1029 | * | |
1030 | * this function checks to see if a board is the same as the | |
1031 | * one it is replacing. this check will detect if the device's | |
1032 | * vendor or device id's are the same | |
1033 | * | |
1034 | * returns 0 if the board is the same nonzero otherwise | |
1035 | */ | |
1036 | int cpqhp_valid_replace(struct controller *ctrl, struct pci_func * func) | |
1037 | { | |
1038 | u8 cloop; | |
1039 | u8 header_type; | |
1040 | u8 secondary_bus; | |
1041 | u8 type; | |
1042 | u32 temp_register = 0; | |
1043 | u32 base; | |
1044 | u32 rc; | |
1045 | struct pci_func *next; | |
1046 | int index = 0; | |
1047 | struct pci_bus *pci_bus = ctrl->pci_bus; | |
1048 | unsigned int devfn; | |
1049 | ||
1050 | if (!func->is_a_board) | |
1051 | return(ADD_NOT_SUPPORTED); | |
1052 | ||
1053 | func = cpqhp_slot_find(func->bus, func->device, index++); | |
1054 | ||
1055 | while (func != NULL) { | |
1056 | pci_bus->number = func->bus; | |
1057 | devfn = PCI_DEVFN(func->device, func->function); | |
1058 | ||
1059 | pci_bus_read_config_dword (pci_bus, devfn, PCI_VENDOR_ID, &temp_register); | |
1060 | ||
1061 | // No adapter present | |
1062 | if (temp_register == 0xFFFFFFFF) | |
1063 | return(NO_ADAPTER_PRESENT); | |
1064 | ||
1065 | if (temp_register != func->config_space[0]) | |
1066 | return(ADAPTER_NOT_SAME); | |
1067 | ||
1068 | // Check for same revision number and class code | |
1069 | pci_bus_read_config_dword (pci_bus, devfn, PCI_CLASS_REVISION, &temp_register); | |
1070 | ||
1071 | // Adapter not the same | |
1072 | if (temp_register != func->config_space[0x08 >> 2]) | |
1073 | return(ADAPTER_NOT_SAME); | |
1074 | ||
1075 | // Check for Bridge | |
1076 | pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type); | |
1077 | ||
1078 | if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { // PCI-PCI Bridge | |
1079 | // In order to continue checking, we must program the | |
1080 | // bus registers in the bridge to respond to accesses | |
1081 | // for it's subordinate bus(es) | |
1082 | ||
1083 | temp_register = func->config_space[0x18 >> 2]; | |
1084 | pci_bus_write_config_dword (pci_bus, devfn, PCI_PRIMARY_BUS, temp_register); | |
1085 | ||
1086 | secondary_bus = (temp_register >> 8) & 0xFF; | |
1087 | ||
1088 | next = cpqhp_slot_list[secondary_bus]; | |
1089 | ||
1090 | while (next != NULL) { | |
1091 | rc = cpqhp_valid_replace(ctrl, next); | |
1092 | if (rc) | |
1093 | return rc; | |
1094 | ||
1095 | next = next->next; | |
1096 | } | |
1097 | ||
1098 | } | |
1099 | // Check to see if it is a standard config header | |
1100 | else if ((header_type & 0x7F) == PCI_HEADER_TYPE_NORMAL) { | |
1101 | // Check subsystem vendor and ID | |
1102 | pci_bus_read_config_dword (pci_bus, devfn, PCI_SUBSYSTEM_VENDOR_ID, &temp_register); | |
1103 | ||
1104 | if (temp_register != func->config_space[0x2C >> 2]) { | |
1105 | // If it's a SMART-2 and the register isn't filled | |
1106 | // in, ignore the difference because | |
1107 | // they just have an old rev of the firmware | |
1108 | ||
1109 | if (!((func->config_space[0] == 0xAE100E11) | |
1110 | && (temp_register == 0x00L))) | |
1111 | return(ADAPTER_NOT_SAME); | |
1112 | } | |
1113 | // Figure out IO and memory base lengths | |
1114 | for (cloop = 0x10; cloop <= 0x24; cloop += 4) { | |
1115 | temp_register = 0xFFFFFFFF; | |
1116 | pci_bus_write_config_dword (pci_bus, devfn, cloop, temp_register); | |
1117 | pci_bus_read_config_dword (pci_bus, devfn, cloop, &base); | |
1118 | if (base) { // If this register is implemented | |
1119 | if (base & 0x01L) { | |
1120 | // IO base | |
1121 | // set base = amount of IO space requested | |
1122 | base = base & 0xFFFFFFFE; | |
1123 | base = (~base) + 1; | |
1124 | ||
1125 | type = 1; | |
1126 | } else { | |
1127 | // memory base | |
1128 | base = base & 0xFFFFFFF0; | |
1129 | base = (~base) + 1; | |
1130 | ||
1131 | type = 0; | |
1132 | } | |
1133 | } else { | |
1134 | base = 0x0L; | |
1135 | type = 0; | |
1136 | } | |
1137 | ||
1138 | // Check information in slot structure | |
1139 | if (func->base_length[(cloop - 0x10) >> 2] != base) | |
1140 | return(ADAPTER_NOT_SAME); | |
1141 | ||
1142 | if (func->base_type[(cloop - 0x10) >> 2] != type) | |
1143 | return(ADAPTER_NOT_SAME); | |
1144 | ||
1145 | } // End of base register loop | |
1146 | ||
1147 | } // End of (type 0 config space) else | |
1148 | else { | |
1149 | // this is not a type 0 or 1 config space header so | |
1150 | // we don't know how to do it | |
1151 | return(DEVICE_TYPE_NOT_SUPPORTED); | |
1152 | } | |
1153 | ||
1154 | // Get the next function | |
1155 | func = cpqhp_slot_find(func->bus, func->device, index++); | |
1156 | } | |
1157 | ||
1158 | ||
1159 | return 0; | |
1160 | } | |
1161 | ||
1162 | ||
1163 | /* | |
1164 | * cpqhp_find_available_resources | |
1165 | * | |
1166 | * Finds available memory, IO, and IRQ resources for programming | |
1167 | * devices which may be added to the system | |
1168 | * this function is for hot plug ADD! | |
1169 | * | |
1170 | * returns 0 if success | |
1171 | */ | |
1172 | int cpqhp_find_available_resources(struct controller *ctrl, void __iomem *rom_start) | |
1173 | { | |
1174 | u8 temp; | |
1175 | u8 populated_slot; | |
1176 | u8 bridged_slot; | |
1177 | void __iomem *one_slot; | |
1178 | void __iomem *rom_resource_table; | |
1179 | struct pci_func *func = NULL; | |
1180 | int i = 10, index; | |
1181 | u32 temp_dword, rc; | |
1182 | struct pci_resource *mem_node; | |
1183 | struct pci_resource *p_mem_node; | |
1184 | struct pci_resource *io_node; | |
1185 | struct pci_resource *bus_node; | |
1186 | ||
1187 | rom_resource_table = detect_HRT_floating_pointer(rom_start, rom_start+0xffff); | |
1188 | dbg("rom_resource_table = %p\n", rom_resource_table); | |
1189 | ||
1190 | if (rom_resource_table == NULL) { | |
1191 | return -ENODEV; | |
1192 | } | |
1193 | // Sum all resources and setup resource maps | |
1194 | unused_IRQ = readl(rom_resource_table + UNUSED_IRQ); | |
1195 | dbg("unused_IRQ = %x\n", unused_IRQ); | |
1196 | ||
1197 | temp = 0; | |
1198 | while (unused_IRQ) { | |
1199 | if (unused_IRQ & 1) { | |
1200 | cpqhp_disk_irq = temp; | |
1201 | break; | |
1202 | } | |
1203 | unused_IRQ = unused_IRQ >> 1; | |
1204 | temp++; | |
1205 | } | |
1206 | ||
1207 | dbg("cpqhp_disk_irq= %d\n", cpqhp_disk_irq); | |
1208 | unused_IRQ = unused_IRQ >> 1; | |
1209 | temp++; | |
1210 | ||
1211 | while (unused_IRQ) { | |
1212 | if (unused_IRQ & 1) { | |
1213 | cpqhp_nic_irq = temp; | |
1214 | break; | |
1215 | } | |
1216 | unused_IRQ = unused_IRQ >> 1; | |
1217 | temp++; | |
1218 | } | |
1219 | ||
1220 | dbg("cpqhp_nic_irq= %d\n", cpqhp_nic_irq); | |
1221 | unused_IRQ = readl(rom_resource_table + PCIIRQ); | |
1222 | ||
1223 | temp = 0; | |
1224 | ||
1225 | if (!cpqhp_nic_irq) { | |
1226 | cpqhp_nic_irq = ctrl->cfgspc_irq; | |
1227 | } | |
1228 | ||
1229 | if (!cpqhp_disk_irq) { | |
1230 | cpqhp_disk_irq = ctrl->cfgspc_irq; | |
1231 | } | |
1232 | ||
1233 | dbg("cpqhp_disk_irq, cpqhp_nic_irq= %d, %d\n", cpqhp_disk_irq, cpqhp_nic_irq); | |
1234 | ||
1235 | rc = compaq_nvram_load(rom_start, ctrl); | |
1236 | if (rc) | |
1237 | return rc; | |
1238 | ||
1239 | one_slot = rom_resource_table + sizeof (struct hrt); | |
1240 | ||
1241 | i = readb(rom_resource_table + NUMBER_OF_ENTRIES); | |
1242 | dbg("number_of_entries = %d\n", i); | |
1243 | ||
1244 | if (!readb(one_slot + SECONDARY_BUS)) | |
1245 | return 1; | |
1246 | ||
1247 | dbg("dev|IO base|length|Mem base|length|Pre base|length|PB SB MB\n"); | |
1248 | ||
1249 | while (i && readb(one_slot + SECONDARY_BUS)) { | |
1250 | u8 dev_func = readb(one_slot + DEV_FUNC); | |
1251 | u8 primary_bus = readb(one_slot + PRIMARY_BUS); | |
1252 | u8 secondary_bus = readb(one_slot + SECONDARY_BUS); | |
1253 | u8 max_bus = readb(one_slot + MAX_BUS); | |
1254 | u16 io_base = readw(one_slot + IO_BASE); | |
1255 | u16 io_length = readw(one_slot + IO_LENGTH); | |
1256 | u16 mem_base = readw(one_slot + MEM_BASE); | |
1257 | u16 mem_length = readw(one_slot + MEM_LENGTH); | |
1258 | u16 pre_mem_base = readw(one_slot + PRE_MEM_BASE); | |
1259 | u16 pre_mem_length = readw(one_slot + PRE_MEM_LENGTH); | |
1260 | ||
1261 | dbg("%2.2x | %4.4x | %4.4x | %4.4x | %4.4x | %4.4x | %4.4x |%2.2x %2.2x %2.2x\n", | |
1262 | dev_func, io_base, io_length, mem_base, mem_length, pre_mem_base, pre_mem_length, | |
1263 | primary_bus, secondary_bus, max_bus); | |
1264 | ||
1265 | // If this entry isn't for our controller's bus, ignore it | |
1266 | if (primary_bus != ctrl->bus) { | |
1267 | i--; | |
1268 | one_slot += sizeof (struct slot_rt); | |
1269 | continue; | |
1270 | } | |
1271 | // find out if this entry is for an occupied slot | |
1272 | ctrl->pci_bus->number = primary_bus; | |
1273 | pci_bus_read_config_dword (ctrl->pci_bus, dev_func, PCI_VENDOR_ID, &temp_dword); | |
1274 | dbg("temp_D_word = %x\n", temp_dword); | |
1275 | ||
1276 | if (temp_dword != 0xFFFFFFFF) { | |
1277 | index = 0; | |
1278 | func = cpqhp_slot_find(primary_bus, dev_func >> 3, 0); | |
1279 | ||
1280 | while (func && (func->function != (dev_func & 0x07))) { | |
1281 | dbg("func = %p (bus, dev, fun) = (%d, %d, %d)\n", func, primary_bus, dev_func >> 3, index); | |
1282 | func = cpqhp_slot_find(primary_bus, dev_func >> 3, index++); | |
1283 | } | |
1284 | ||
1285 | // If we can't find a match, skip this table entry | |
1286 | if (!func) { | |
1287 | i--; | |
1288 | one_slot += sizeof (struct slot_rt); | |
1289 | continue; | |
1290 | } | |
1291 | // this may not work and shouldn't be used | |
1292 | if (secondary_bus != primary_bus) | |
1293 | bridged_slot = 1; | |
1294 | else | |
1295 | bridged_slot = 0; | |
1296 | ||
1297 | populated_slot = 1; | |
1298 | } else { | |
1299 | populated_slot = 0; | |
1300 | bridged_slot = 0; | |
1301 | } | |
1302 | ||
1303 | ||
1304 | // If we've got a valid IO base, use it | |
1305 | ||
1306 | temp_dword = io_base + io_length; | |
1307 | ||
1308 | if ((io_base) && (temp_dword < 0x10000)) { | |
1309 | io_node = kmalloc(sizeof(*io_node), GFP_KERNEL); | |
1310 | if (!io_node) | |
1311 | return -ENOMEM; | |
1312 | ||
1313 | io_node->base = io_base; | |
1314 | io_node->length = io_length; | |
1315 | ||
1316 | dbg("found io_node(base, length) = %x, %x\n", | |
1317 | io_node->base, io_node->length); | |
1318 | dbg("populated slot =%d \n", populated_slot); | |
1319 | if (!populated_slot) { | |
1320 | io_node->next = ctrl->io_head; | |
1321 | ctrl->io_head = io_node; | |
1322 | } else { | |
1323 | io_node->next = func->io_head; | |
1324 | func->io_head = io_node; | |
1325 | } | |
1326 | } | |
1327 | ||
1328 | // If we've got a valid memory base, use it | |
1329 | temp_dword = mem_base + mem_length; | |
1330 | if ((mem_base) && (temp_dword < 0x10000)) { | |
1331 | mem_node = kmalloc(sizeof(*mem_node), GFP_KERNEL); | |
1332 | if (!mem_node) | |
1333 | return -ENOMEM; | |
1334 | ||
1335 | mem_node->base = mem_base << 16; | |
1336 | ||
1337 | mem_node->length = mem_length << 16; | |
1338 | ||
1339 | dbg("found mem_node(base, length) = %x, %x\n", | |
1340 | mem_node->base, mem_node->length); | |
1341 | dbg("populated slot =%d \n", populated_slot); | |
1342 | if (!populated_slot) { | |
1343 | mem_node->next = ctrl->mem_head; | |
1344 | ctrl->mem_head = mem_node; | |
1345 | } else { | |
1346 | mem_node->next = func->mem_head; | |
1347 | func->mem_head = mem_node; | |
1348 | } | |
1349 | } | |
1350 | ||
1351 | // If we've got a valid prefetchable memory base, and | |
1352 | // the base + length isn't greater than 0xFFFF | |
1353 | temp_dword = pre_mem_base + pre_mem_length; | |
1354 | if ((pre_mem_base) && (temp_dword < 0x10000)) { | |
1355 | p_mem_node = kmalloc(sizeof(*p_mem_node), GFP_KERNEL); | |
1356 | if (!p_mem_node) | |
1357 | return -ENOMEM; | |
1358 | ||
1359 | p_mem_node->base = pre_mem_base << 16; | |
1360 | ||
1361 | p_mem_node->length = pre_mem_length << 16; | |
1362 | dbg("found p_mem_node(base, length) = %x, %x\n", | |
1363 | p_mem_node->base, p_mem_node->length); | |
1364 | dbg("populated slot =%d \n", populated_slot); | |
1365 | ||
1366 | if (!populated_slot) { | |
1367 | p_mem_node->next = ctrl->p_mem_head; | |
1368 | ctrl->p_mem_head = p_mem_node; | |
1369 | } else { | |
1370 | p_mem_node->next = func->p_mem_head; | |
1371 | func->p_mem_head = p_mem_node; | |
1372 | } | |
1373 | } | |
1374 | ||
1375 | // If we've got a valid bus number, use it | |
1376 | // The second condition is to ignore bus numbers on | |
1377 | // populated slots that don't have PCI-PCI bridges | |
1378 | if (secondary_bus && (secondary_bus != primary_bus)) { | |
1379 | bus_node = kmalloc(sizeof(*bus_node), GFP_KERNEL); | |
1380 | if (!bus_node) | |
1381 | return -ENOMEM; | |
1382 | ||
1383 | bus_node->base = secondary_bus; | |
1384 | bus_node->length = max_bus - secondary_bus + 1; | |
1385 | dbg("found bus_node(base, length) = %x, %x\n", | |
1386 | bus_node->base, bus_node->length); | |
1387 | dbg("populated slot =%d \n", populated_slot); | |
1388 | if (!populated_slot) { | |
1389 | bus_node->next = ctrl->bus_head; | |
1390 | ctrl->bus_head = bus_node; | |
1391 | } else { | |
1392 | bus_node->next = func->bus_head; | |
1393 | func->bus_head = bus_node; | |
1394 | } | |
1395 | } | |
1396 | ||
1397 | i--; | |
1398 | one_slot += sizeof (struct slot_rt); | |
1399 | } | |
1400 | ||
1401 | // If all of the following fail, we don't have any resources for | |
1402 | // hot plug add | |
1403 | rc = 1; | |
1404 | rc &= cpqhp_resource_sort_and_combine(&(ctrl->mem_head)); | |
1405 | rc &= cpqhp_resource_sort_and_combine(&(ctrl->p_mem_head)); | |
1406 | rc &= cpqhp_resource_sort_and_combine(&(ctrl->io_head)); | |
1407 | rc &= cpqhp_resource_sort_and_combine(&(ctrl->bus_head)); | |
1408 | ||
1409 | return rc; | |
1410 | } | |
1411 | ||
1412 | ||
1413 | /* | |
1414 | * cpqhp_return_board_resources | |
1415 | * | |
1416 | * this routine returns all resources allocated to a board to | |
1417 | * the available pool. | |
1418 | * | |
1419 | * returns 0 if success | |
1420 | */ | |
1421 | int cpqhp_return_board_resources(struct pci_func * func, struct resource_lists * resources) | |
1422 | { | |
1423 | int rc = 0; | |
1424 | struct pci_resource *node; | |
1425 | struct pci_resource *t_node; | |
66bef8c0 | 1426 | dbg("%s\n", __func__); |
1da177e4 LT |
1427 | |
1428 | if (!func) | |
1429 | return 1; | |
1430 | ||
1431 | node = func->io_head; | |
1432 | func->io_head = NULL; | |
1433 | while (node) { | |
1434 | t_node = node->next; | |
1435 | return_resource(&(resources->io_head), node); | |
1436 | node = t_node; | |
1437 | } | |
1438 | ||
1439 | node = func->mem_head; | |
1440 | func->mem_head = NULL; | |
1441 | while (node) { | |
1442 | t_node = node->next; | |
1443 | return_resource(&(resources->mem_head), node); | |
1444 | node = t_node; | |
1445 | } | |
1446 | ||
1447 | node = func->p_mem_head; | |
1448 | func->p_mem_head = NULL; | |
1449 | while (node) { | |
1450 | t_node = node->next; | |
1451 | return_resource(&(resources->p_mem_head), node); | |
1452 | node = t_node; | |
1453 | } | |
1454 | ||
1455 | node = func->bus_head; | |
1456 | func->bus_head = NULL; | |
1457 | while (node) { | |
1458 | t_node = node->next; | |
1459 | return_resource(&(resources->bus_head), node); | |
1460 | node = t_node; | |
1461 | } | |
1462 | ||
1463 | rc |= cpqhp_resource_sort_and_combine(&(resources->mem_head)); | |
1464 | rc |= cpqhp_resource_sort_and_combine(&(resources->p_mem_head)); | |
1465 | rc |= cpqhp_resource_sort_and_combine(&(resources->io_head)); | |
1466 | rc |= cpqhp_resource_sort_and_combine(&(resources->bus_head)); | |
1467 | ||
1468 | return rc; | |
1469 | } | |
1470 | ||
1471 | ||
1472 | /* | |
1473 | * cpqhp_destroy_resource_list | |
1474 | * | |
1475 | * Puts node back in the resource list pointed to by head | |
1476 | */ | |
1477 | void cpqhp_destroy_resource_list (struct resource_lists * resources) | |
1478 | { | |
1479 | struct pci_resource *res, *tres; | |
1480 | ||
1481 | res = resources->io_head; | |
1482 | resources->io_head = NULL; | |
1483 | ||
1484 | while (res) { | |
1485 | tres = res; | |
1486 | res = res->next; | |
1487 | kfree(tres); | |
1488 | } | |
1489 | ||
1490 | res = resources->mem_head; | |
1491 | resources->mem_head = NULL; | |
1492 | ||
1493 | while (res) { | |
1494 | tres = res; | |
1495 | res = res->next; | |
1496 | kfree(tres); | |
1497 | } | |
1498 | ||
1499 | res = resources->p_mem_head; | |
1500 | resources->p_mem_head = NULL; | |
1501 | ||
1502 | while (res) { | |
1503 | tres = res; | |
1504 | res = res->next; | |
1505 | kfree(tres); | |
1506 | } | |
1507 | ||
1508 | res = resources->bus_head; | |
1509 | resources->bus_head = NULL; | |
1510 | ||
1511 | while (res) { | |
1512 | tres = res; | |
1513 | res = res->next; | |
1514 | kfree(tres); | |
1515 | } | |
1516 | } | |
1517 | ||
1518 | ||
1519 | /* | |
1520 | * cpqhp_destroy_board_resources | |
1521 | * | |
1522 | * Puts node back in the resource list pointed to by head | |
1523 | */ | |
1524 | void cpqhp_destroy_board_resources (struct pci_func * func) | |
1525 | { | |
1526 | struct pci_resource *res, *tres; | |
1527 | ||
1528 | res = func->io_head; | |
1529 | func->io_head = NULL; | |
1530 | ||
1531 | while (res) { | |
1532 | tres = res; | |
1533 | res = res->next; | |
1534 | kfree(tres); | |
1535 | } | |
1536 | ||
1537 | res = func->mem_head; | |
1538 | func->mem_head = NULL; | |
1539 | ||
1540 | while (res) { | |
1541 | tres = res; | |
1542 | res = res->next; | |
1543 | kfree(tres); | |
1544 | } | |
1545 | ||
1546 | res = func->p_mem_head; | |
1547 | func->p_mem_head = NULL; | |
1548 | ||
1549 | while (res) { | |
1550 | tres = res; | |
1551 | res = res->next; | |
1552 | kfree(tres); | |
1553 | } | |
1554 | ||
1555 | res = func->bus_head; | |
1556 | func->bus_head = NULL; | |
1557 | ||
1558 | while (res) { | |
1559 | tres = res; | |
1560 | res = res->next; | |
1561 | kfree(tres); | |
1562 | } | |
1563 | } | |
1564 |