Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * IBM Hot Plug Controller Driver | |
f7625980 | 3 | * |
1da177e4 | 4 | * Written By: Irene Zubarev, IBM Corporation |
f7625980 | 5 | * |
1da177e4 LT |
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: | |
f7625980 | 45 | * 9 for SCSI, 10 for LAN adapters, and 11 for everything else. |
1da177e4 LT |
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 | */ | |
3c78bc61 | 50 | static void assign_alt_irq (struct pci_func *cur_func, u8 class_code) |
1da177e4 LT |
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 | |
f7625980 | 74 | * |
1da177e4 | 75 | * Input: function to be added |
f7625980 | 76 | * |
1da177e4 | 77 | * TO DO: The error case with Multifunction device or multi function bridge, |
f7625980 | 78 | * if there is an error, will need to go through all previous functions and |
1da177e4 LT |
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, | |
f7625980 | 101 | * func->busno is correct, and func->device contains only device (at the 5 |
1da177e4 LT |
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 | ||
367fa982 | 112 | debug ("inside the loop, cur_func->busno = %x, cur_func->device = %x, cur_func->function = %x\n", |
1da177e4 LT |
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) { | |
227f0647 RD |
140 | err ("The device %x is not supported for hot plugging. Please choose another device.\n", |
141 | cur_func->device); | |
1da177e4 LT |
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; | |
f7625980 | 154 | } |
1da177e4 LT |
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 | } | |
f5afe806 | 167 | newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL); |
1da177e4 LT |
168 | if (!newfunc) { |
169 | err ("out of system memory\n"); | |
170 | return -ENOMEM; | |
171 | } | |
1da177e4 LT |
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) { | |
227f0647 RD |
182 | err ("This %x is not PCI-to-PCI bridge, and as is not supported for hot-plugging. Please insert another card.\n", |
183 | cur_func->device); | |
1da177e4 LT |
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); | |
dc6712d1 | 202 | flag = 0; |
1da177e4 LT |
203 | for (i = 0; i < 32; i++) { |
204 | if (func->devices[i]) { | |
f5afe806 | 205 | newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL); |
1da177e4 LT |
206 | if (!newfunc) { |
207 | err ("out of system memory\n"); | |
208 | return -ENOMEM; | |
209 | } | |
1da177e4 LT |
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 | } | |
dc6712d1 | 229 | flag = 1; |
1da177e4 LT |
230 | } |
231 | } | |
232 | ||
f5afe806 | 233 | newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL); |
1da177e4 LT |
234 | if (!newfunc) { |
235 | err ("out of system memory\n"); | |
236 | return -ENOMEM; | |
237 | } | |
1da177e4 LT |
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) { | |
227f0647 RD |
250 | err ("This %x is not PCI-to-PCI bridge, and as is not supported for hot-plugging. Please insert another card.\n", |
251 | cur_func->device); | |
1da177e4 LT |
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); | |
dc6712d1 | 275 | flag = 0; |
1da177e4 LT |
276 | for (i = 0; i < 32; i++) { |
277 | if (func->devices[i]) { | |
278 | debug ("inside for loop, device is %x\n", i); | |
f5afe806 | 279 | newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL); |
1da177e4 LT |
280 | if (!newfunc) { |
281 | err (" out of system memory\n"); | |
282 | return -ENOMEM; | |
283 | } | |
1da177e4 LT |
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 | } | |
dc6712d1 | 304 | flag = 1; |
1da177e4 LT |
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 | /* | |
f7625980 | 342 | * This function configures the pci BARs of a single device. |
1da177e4 LT |
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 | ||
66bef8c0 | 367 | debug ("%s - inside\n", __func__); |
1da177e4 LT |
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 | ||
f7625980 | 374 | /* not sure if i need this. per scott, said maybe need * something like this |
1da177e4 LT |
375 | if devices don't adhere 100% to the spec, so don't want to write |
376 | to the reserved bits | |
377 | ||
f7625980 | 378 | pcibios_read_config_byte(cur_func->busno, cur_func->device, |
1da177e4 LT |
379 | PCI_BASE_ADDRESS_0 + 4 * count, &tmp); |
380 | if (tmp & 0x01) // IO | |
f7625980 | 381 | pcibios_write_config_dword(cur_func->busno, cur_func->device, |
1da177e4 LT |
382 | PCI_BASE_ADDRESS_0 + 4 * count, 0xFFFFFFFD); |
383 | else // Memory | |
f7625980 | 384 | pcibios_write_config_dword(cur_func->busno, cur_func->device, |
1da177e4 LT |
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 | ||
f5afe806 | 404 | io[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
1da177e4 LT |
405 | |
406 | if (!io[count]) { | |
407 | err ("out of system memory\n"); | |
408 | return -ENOMEM; | |
409 | } | |
1da177e4 LT |
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); | |
f7625980 BH |
424 | |
425 | /* _______________This is for debugging purposes only_____________________ */ | |
1da177e4 LT |
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 | ||
f5afe806 | 442 | pfmem[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
1da177e4 LT |
443 | if (!pfmem[count]) { |
444 | err ("out of system memory\n"); | |
445 | return -ENOMEM; | |
446 | } | |
1da177e4 LT |
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]; | |
dc6712d1 | 452 | pfmem[count]->fromMem = 0; |
1da177e4 LT |
453 | if (ibmphp_check_resource (pfmem[count], 0) == 0) { |
454 | ibmphp_add_resource (pfmem[count]); | |
455 | func->pfmem[count] = pfmem[count]; | |
456 | } else { | |
f5afe806 | 457 | mem_tmp = kzalloc(sizeof(*mem_tmp), GFP_KERNEL); |
1da177e4 LT |
458 | if (!mem_tmp) { |
459 | err ("out of system memory\n"); | |
460 | kfree (pfmem[count]); | |
461 | return -ENOMEM; | |
462 | } | |
1da177e4 LT |
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); | |
dc6712d1 | 470 | pfmem[count]->fromMem = 1; |
1da177e4 LT |
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 | ||
f7625980 | 487 | /*_______________This is for debugging purposes only______________________________*/ |
1da177e4 LT |
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 | ||
f5afe806 | 508 | mem[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
1da177e4 LT |
509 | if (!mem[count]) { |
510 | err ("out of system memory\n"); | |
511 | return -ENOMEM; | |
512 | } | |
1da177e4 LT |
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 | ||
d648daca | 553 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, PCI_ROM_ADDRESS, 0x00L); |
1da177e4 LT |
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 | |
f7625980 | 562 | * Returns: |
1da177e4 LT |
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]; | |
dc6712d1 KA |
574 | u8 flag_io = 0; |
575 | u8 flag_mem = 0; | |
576 | u8 flag_pfmem = 0; | |
577 | u8 need_io_upper = 0; | |
578 | u8 need_pfmem_upper = 0; | |
1da177e4 LT |
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 | ||
66bef8c0 | 598 | debug ("%s - enter\n", __func__); |
1da177e4 LT |
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); | |
f7625980 | 625 | |
1da177e4 LT |
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 | /* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! | |
f7625980 | 647 | !!!!!!!!!!!!!!!NEED TO ADD!!! FAST BACK-TO-BACK ENABLE!!!!!!!!!!!!!!!!!!!! |
1da177e4 LT |
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 | ||
f5afe806 | 672 | bus_io[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
f7625980 | 673 | |
1da177e4 LT |
674 | if (!bus_io[count]) { |
675 | err ("out of system memory\n"); | |
676 | retval = -ENOMEM; | |
677 | goto error; | |
678 | } | |
1da177e4 LT |
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 | ||
f5afe806 | 705 | bus_pfmem[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
1da177e4 LT |
706 | if (!bus_pfmem[count]) { |
707 | err ("out of system memory\n"); | |
708 | retval = -ENOMEM; | |
709 | goto error; | |
710 | } | |
1da177e4 LT |
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]; | |
dc6712d1 | 716 | bus_pfmem[count]->fromMem = 0; |
1da177e4 LT |
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 { | |
f5afe806 | 721 | mem_tmp = kzalloc(sizeof(*mem_tmp), GFP_KERNEL); |
1da177e4 LT |
722 | if (!mem_tmp) { |
723 | err ("out of system memory\n"); | |
724 | retval = -ENOMEM; | |
725 | goto error; | |
726 | } | |
1da177e4 LT |
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); | |
dc6712d1 | 733 | bus_pfmem[count]->fromMem = 1; |
1da177e4 LT |
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 { | |
f7625980 | 738 | err ("cannot allocate requested pfmem for bus %x, device %x, len %x\n", |
1da177e4 LT |
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 | ||
f5afe806 | 762 | bus_mem[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL); |
1da177e4 LT |
763 | if (!bus_mem[count]) { |
764 | err ("out of system memory\n"); | |
765 | retval = -ENOMEM; | |
766 | goto error; | |
767 | } | |
1da177e4 LT |
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 | ||
f7625980 | 808 | if (amount_needed->not_correct) { |
1da177e4 LT |
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"); | |
dc6712d1 | 829 | flag_io = 1; |
1da177e4 LT |
830 | } else { |
831 | debug ("it wants %x IO behind the bridge\n", amount_needed->io); | |
f5afe806 | 832 | io = kzalloc(sizeof(*io), GFP_KERNEL); |
f7625980 | 833 | |
1da177e4 LT |
834 | if (!io) { |
835 | err ("out of system memory\n"); | |
836 | retval = -ENOMEM; | |
837 | goto error; | |
838 | } | |
1da177e4 LT |
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); | |
dc6712d1 | 846 | flag_io = 1; |
1da177e4 LT |
847 | } |
848 | } | |
849 | ||
850 | if (!amount_needed->mem) { | |
851 | debug ("it doesn't want n.e.memory?\n"); | |
dc6712d1 | 852 | flag_mem = 1; |
1da177e4 LT |
853 | } else { |
854 | debug ("it wants %x memory behind the bridge\n", amount_needed->mem); | |
f5afe806 | 855 | mem = kzalloc(sizeof(*mem), GFP_KERNEL); |
1da177e4 LT |
856 | if (!mem) { |
857 | err ("out of system memory\n"); | |
858 | retval = -ENOMEM; | |
859 | goto error; | |
860 | } | |
1da177e4 LT |
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); | |
dc6712d1 | 867 | flag_mem = 1; |
1da177e4 LT |
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"); | |
dc6712d1 | 874 | flag_pfmem = 1; |
1da177e4 LT |
875 | } else { |
876 | debug ("it wants %x pfmemory behind the bridge\n", amount_needed->pfmem); | |
f5afe806 | 877 | pfmem = kzalloc(sizeof(*pfmem), GFP_KERNEL); |
1da177e4 LT |
878 | if (!pfmem) { |
879 | err ("out of system memory\n"); | |
880 | retval = -ENOMEM; | |
881 | goto error; | |
882 | } | |
1da177e4 LT |
883 | pfmem->type = PFMEM; |
884 | pfmem->busno = func->busno; | |
885 | pfmem->devfunc = PCI_DEVFN(func->device, func->function); | |
886 | pfmem->len = amount_needed->pfmem; | |
dc6712d1 | 887 | pfmem->fromMem = 0; |
1da177e4 LT |
888 | if (ibmphp_check_resource (pfmem, 1) == 0) { |
889 | ibmphp_add_resource (pfmem); | |
dc6712d1 | 890 | flag_pfmem = 1; |
1da177e4 | 891 | } else { |
f5afe806 | 892 | mem_tmp = kzalloc(sizeof(*mem_tmp), GFP_KERNEL); |
1da177e4 LT |
893 | if (!mem_tmp) { |
894 | err ("out of system memory\n"); | |
895 | retval = -ENOMEM; | |
896 | goto error; | |
897 | } | |
1da177e4 LT |
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); | |
dc6712d1 | 904 | pfmem->fromMem = 1; |
1da177e4 LT |
905 | pfmem->rangeno = mem_tmp->rangeno; |
906 | ibmphp_add_pfmem_from_mem (pfmem); | |
dc6712d1 | 907 | flag_pfmem = 1; |
1da177e4 LT |
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) { | |
f5afe806 | 923 | bus = kzalloc(sizeof(*bus), GFP_KERNEL); |
1da177e4 LT |
924 | if (!bus) { |
925 | err ("out of system memory\n"); | |
926 | retval = -ENOMEM; | |
927 | goto error; | |
928 | } | |
1da177e4 LT |
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"); | |
dc6712d1 | 953 | need_io_upper = 1; |
1da177e4 | 954 | } |
88d69a1d | 955 | if ((pfmem_base & PCI_PREF_RANGE_TYPE_MASK) == PCI_PREF_RANGE_TYPE_64) { |
1da177e4 | 956 | debug ("pfmem 64\n"); |
dc6712d1 | 957 | need_pfmem_upper = 1; |
1da177e4 LT |
958 | } |
959 | ||
960 | if (bus->noIORanges) { | |
961 | pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_IO_BASE, 0x00 | bus->rangeIO->start >> 8); | |
f7625980 | 962 | pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_IO_LIMIT, 0x00 | bus->rangeIO->end >> 8); |
1da177e4 LT |
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); | |
f7625980 | 983 | |
1da177e4 LT |
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]); | |
f7625980 | 1020 | /* |
1da177e4 LT |
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 | |
f7625980 | 1074 | * Output: amount of resources needed |
1da177e4 | 1075 | *****************************************************************************/ |
3c78bc61 | 1076 | static struct res_needed *scan_behind_bridge (struct pci_func *func, u8 busno) |
1da177e4 LT |
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 | ||
f5afe806 | 1097 | amount = kzalloc(sizeof(*amount), GFP_KERNEL); |
1da177e4 LT |
1098 | if (amount == NULL) |
1099 | return NULL; | |
1da177e4 LT |
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"); | |
dc6712d1 | 1122 | amount->not_correct = 1; |
1da177e4 LT |
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) { | |
227f0647 | 1128 | err ("The device %x is VGA compatible and as is not supported for hot plugging. Please choose another device.\n", device); |
dc6712d1 | 1129 | amount->not_correct = 1; |
1da177e4 LT |
1130 | return amount; |
1131 | } else if (class == PCI_CLASS_DISPLAY_VGA) { | |
227f0647 | 1132 | err ("The device %x is not supported for hot plugging. Please choose another device.\n", device); |
dc6712d1 | 1133 | amount->not_correct = 1; |
1da177e4 LT |
1134 | return amount; |
1135 | } | |
1136 | ||
1137 | amount->devices[device] = 1; | |
1138 | ||
1139 | for (count = 0; address[count]; count++) { | |
1140 | /* for 6 BARs */ | |
1141 | /* | |
1142 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, address[count], &tmp); | |
1143 | if (tmp & 0x01) // IO | |
1144 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0xFFFFFFFD); | |
1145 | else // MEMORY | |
1146 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0xFFFFFFFF); | |
1147 | */ | |
1148 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0xFFFFFFFF); | |
1149 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &bar[count]); | |
1150 | ||
1151 | debug ("what is bar[count]? %x, count = %d\n", bar[count], count); | |
1152 | ||
1153 | if (!bar[count]) /* This BAR is not implemented */ | |
1154 | continue; | |
1155 | ||
1156 | //tmp_bar = bar[count]; | |
1157 | ||
1158 | debug ("count %d device %x function %x wants %x resources\n", count, device, function, bar[count]); | |
1159 | ||
1160 | if (bar[count] & PCI_BASE_ADDRESS_SPACE_IO) { | |
1161 | /* This is IO */ | |
1162 | len[count] = bar[count] & 0xFFFFFFFC; | |
1163 | len[count] = ~len[count] + 1; | |
1164 | amount->io += len[count]; | |
1165 | } else { | |
1166 | /* This is Memory */ | |
1167 | if (bar[count] & PCI_BASE_ADDRESS_MEM_PREFETCH) { | |
1168 | /* pfmem */ | |
1169 | len[count] = bar[count] & 0xFFFFFFF0; | |
1170 | len[count] = ~len[count] + 1; | |
1171 | amount->pfmem += len[count]; | |
1172 | if (bar[count] & PCI_BASE_ADDRESS_MEM_TYPE_64) | |
1173 | /* takes up another dword */ | |
1174 | count += 1; | |
1175 | ||
1176 | } else { | |
1177 | /* regular memory */ | |
1178 | len[count] = bar[count] & 0xFFFFFFF0; | |
1179 | len[count] = ~len[count] + 1; | |
1180 | amount->mem += len[count]; | |
1181 | if (bar[count] & PCI_BASE_ADDRESS_MEM_TYPE_64) { | |
1182 | /* takes up another dword */ | |
1183 | count += 1; | |
1184 | } | |
1185 | } | |
1186 | } | |
1187 | } /* end for */ | |
1188 | } /* end if (valid) */ | |
1189 | } /* end for */ | |
1190 | } /* end for */ | |
1191 | ||
1192 | if (!howmany) | |
dc6712d1 | 1193 | amount->not_correct = 1; |
1da177e4 | 1194 | else |
dc6712d1 | 1195 | amount->not_correct = 0; |
1da177e4 LT |
1196 | if ((amount->io) && (amount->io < IOBRIDGE)) |
1197 | amount->io = IOBRIDGE; | |
1198 | if ((amount->mem) && (amount->mem < MEMBRIDGE)) | |
1199 | amount->mem = MEMBRIDGE; | |
1200 | if ((amount->pfmem) && (amount->pfmem < MEMBRIDGE)) | |
1201 | amount->pfmem = MEMBRIDGE; | |
1202 | return amount; | |
1203 | } | |
1204 | ||
f7625980 BH |
1205 | /* The following 3 unconfigure_boot_ routines deal with the case when we had the card |
1206 | * upon bootup in the system, since we don't allocate func to such case, we need to read | |
1207 | * the start addresses from pci config space and then find the corresponding entries in | |
1da177e4 LT |
1208 | * our resource lists. The functions return either 0, -ENODEV, or -1 (general failure) |
1209 | * Change: we also call these functions even if we configured the card ourselves (i.e., not | |
1210 | * the bootup case), since it should work same way | |
1211 | */ | |
1212 | static int unconfigure_boot_device (u8 busno, u8 device, u8 function) | |
1213 | { | |
1214 | u32 start_address; | |
1215 | u32 address[] = { | |
1216 | PCI_BASE_ADDRESS_0, | |
1217 | PCI_BASE_ADDRESS_1, | |
1218 | PCI_BASE_ADDRESS_2, | |
1219 | PCI_BASE_ADDRESS_3, | |
1220 | PCI_BASE_ADDRESS_4, | |
1221 | PCI_BASE_ADDRESS_5, | |
1222 | 0 | |
1223 | }; | |
1224 | int count; | |
1225 | struct resource_node *io; | |
1226 | struct resource_node *mem; | |
1227 | struct resource_node *pfmem; | |
1228 | struct bus_node *bus; | |
1229 | u32 end_address; | |
1230 | u32 temp_end; | |
1231 | u32 size; | |
1232 | u32 tmp_address; | |
1233 | unsigned int devfn; | |
1234 | ||
66bef8c0 | 1235 | debug ("%s - enter\n", __func__); |
1da177e4 LT |
1236 | |
1237 | bus = ibmphp_find_res_bus (busno); | |
1238 | if (!bus) { | |
1239 | debug ("cannot find corresponding bus.\n"); | |
1240 | return -EINVAL; | |
1241 | } | |
1242 | ||
1243 | devfn = PCI_DEVFN(device, function); | |
1244 | ibmphp_pci_bus->number = busno; | |
1245 | for (count = 0; address[count]; count++) { /* for 6 BARs */ | |
1246 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &start_address); | |
1247 | ||
1248 | /* We can do this here, b/c by that time the device driver of the card has been stopped */ | |
1249 | ||
1250 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0xFFFFFFFF); | |
1251 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &size); | |
1252 | pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], start_address); | |
1253 | ||
1254 | debug ("start_address is %x\n", start_address); | |
1255 | debug ("busno, device, function %x %x %x\n", busno, device, function); | |
1256 | if (!size) { | |
1257 | /* This BAR is not implemented */ | |
1258 | debug ("is this bar no implemented?, count = %d\n", count); | |
1259 | continue; | |
1260 | } | |
1261 | tmp_address = start_address; | |
1262 | if (start_address & PCI_BASE_ADDRESS_SPACE_IO) { | |
1263 | /* This is IO */ | |
1264 | start_address &= PCI_BASE_ADDRESS_IO_MASK; | |
1265 | size = size & 0xFFFFFFFC; | |
1266 | size = ~size + 1; | |
1267 | end_address = start_address + size - 1; | |
1268 | if (ibmphp_find_resource (bus, start_address, &io, IO) < 0) { | |
1269 | err ("cannot find corresponding IO resource to remove\n"); | |
1270 | return -EIO; | |
1271 | } | |
1272 | debug ("io->start = %x\n", io->start); | |
1273 | temp_end = io->end; | |
1274 | start_address = io->end + 1; | |
1275 | ibmphp_remove_resource (io); | |
1276 | /* This is needed b/c of the old I/O restrictions in the BIOS */ | |
1277 | while (temp_end < end_address) { | |
1278 | if (ibmphp_find_resource (bus, start_address, &io, IO) < 0) { | |
1279 | err ("cannot find corresponding IO resource to remove\n"); | |
1280 | return -EIO; | |
1281 | } | |
1282 | debug ("io->start = %x\n", io->start); | |
1283 | temp_end = io->end; | |
1284 | start_address = io->end + 1; | |
1285 | ibmphp_remove_resource (io); | |
1286 | } | |
1287 | ||
1288 | /* ????????? DO WE NEED TO WRITE ANYTHING INTO THE PCI CONFIG SPACE BACK ?????????? */ | |
1289 | } else { | |
1290 | /* This is Memory */ | |
1da177e4 LT |
1291 | if (start_address & PCI_BASE_ADDRESS_MEM_PREFETCH) { |
1292 | /* pfmem */ | |
1293 | debug ("start address of pfmem is %x\n", start_address); | |
034ecc72 | 1294 | start_address &= PCI_BASE_ADDRESS_MEM_MASK; |
1da177e4 LT |
1295 | |
1296 | if (ibmphp_find_resource (bus, start_address, &pfmem, PFMEM) < 0) { | |
1297 | err ("cannot find corresponding PFMEM resource to remove\n"); | |
1298 | return -EIO; | |
1299 | } | |
1300 | if (pfmem) { | |
1301 | debug ("pfmem->start = %x\n", pfmem->start); | |
1302 | ||
1303 | ibmphp_remove_resource(pfmem); | |
1304 | } | |
1305 | } else { | |
1306 | /* regular memory */ | |
1307 | debug ("start address of mem is %x\n", start_address); | |
034ecc72 REB |
1308 | start_address &= PCI_BASE_ADDRESS_MEM_MASK; |
1309 | ||
1da177e4 LT |
1310 | if (ibmphp_find_resource (bus, start_address, &mem, MEM) < 0) { |
1311 | err ("cannot find corresponding MEM resource to remove\n"); | |
1312 | return -EIO; | |
1313 | } | |
1314 | if (mem) { | |
1315 | debug ("mem->start = %x\n", mem->start); | |
1316 | ||
1317 | ibmphp_remove_resource(mem); | |
1318 | } | |
1319 | } | |
1320 | if (tmp_address & PCI_BASE_ADDRESS_MEM_TYPE_64) { | |
1321 | /* takes up another dword */ | |
1322 | count += 1; | |
1323 | } | |
1324 | } /* end of mem */ | |
1325 | } /* end of for */ | |
1326 | ||
1327 | return 0; | |
1328 | } | |
1329 | ||
1330 | static int unconfigure_boot_bridge (u8 busno, u8 device, u8 function) | |
1331 | { | |
1332 | int count; | |
1333 | int bus_no, pri_no, sub_no, sec_no = 0; | |
1334 | u32 start_address, tmp_address; | |
1335 | u8 sec_number, sub_number, pri_number; | |
1336 | struct resource_node *io = NULL; | |
1337 | struct resource_node *mem = NULL; | |
1338 | struct resource_node *pfmem = NULL; | |
1339 | struct bus_node *bus; | |
1340 | u32 address[] = { | |
1341 | PCI_BASE_ADDRESS_0, | |
1342 | PCI_BASE_ADDRESS_1, | |
1343 | 0 | |
1344 | }; | |
1345 | unsigned int devfn; | |
1346 | ||
1347 | devfn = PCI_DEVFN(device, function); | |
1348 | ibmphp_pci_bus->number = busno; | |
1349 | bus_no = (int) busno; | |
1350 | debug ("busno is %x\n", busno); | |
1351 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_PRIMARY_BUS, &pri_number); | |
66bef8c0 | 1352 | debug ("%s - busno = %x, primary_number = %x\n", __func__, busno, pri_number); |
1da177e4 LT |
1353 | |
1354 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_SECONDARY_BUS, &sec_number); | |
1355 | debug ("sec_number is %x\n", sec_number); | |
1356 | sec_no = (int) sec_number; | |
1357 | pri_no = (int) pri_number; | |
1358 | if (pri_no != bus_no) { | |
1359 | err ("primary numbers in our structures and pci config space don't match.\n"); | |
1360 | return -EINVAL; | |
1361 | } | |
1362 | ||
1363 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_SUBORDINATE_BUS, &sub_number); | |
1364 | sub_no = (int) sub_number; | |
1365 | debug ("sub_no is %d, sec_no is %d\n", sub_no, sec_no); | |
1366 | if (sec_no != sub_number) { | |
1367 | err ("there're more buses behind this bridge. Hot removal is not supported. Please choose another card\n"); | |
1368 | return -ENODEV; | |
1369 | } | |
1370 | ||
1371 | bus = ibmphp_find_res_bus (sec_number); | |
1da177e4 LT |
1372 | if (!bus) { |
1373 | err ("cannot find Bus structure for the bridged device\n"); | |
1374 | return -EINVAL; | |
1375 | } | |
b0d974e9 AB |
1376 | debug("bus->busno is %x\n", bus->busno); |
1377 | debug("sec_number is %x\n", sec_number); | |
1da177e4 LT |
1378 | |
1379 | ibmphp_remove_bus (bus, busno); | |
1380 | ||
1381 | for (count = 0; address[count]; count++) { | |
1382 | /* for 2 BARs */ | |
1383 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, address[count], &start_address); | |
1384 | ||
1385 | if (!start_address) { | |
1386 | /* This BAR is not implemented */ | |
1387 | continue; | |
1388 | } | |
1389 | ||
1390 | tmp_address = start_address; | |
1391 | ||
1392 | if (start_address & PCI_BASE_ADDRESS_SPACE_IO) { | |
1393 | /* This is IO */ | |
1394 | start_address &= PCI_BASE_ADDRESS_IO_MASK; | |
1395 | if (ibmphp_find_resource (bus, start_address, &io, IO) < 0) { | |
1396 | err ("cannot find corresponding IO resource to remove\n"); | |
1397 | return -EIO; | |
1398 | } | |
1399 | if (io) | |
1400 | debug ("io->start = %x\n", io->start); | |
1401 | ||
1402 | ibmphp_remove_resource (io); | |
1403 | ||
1404 | /* ????????? DO WE NEED TO WRITE ANYTHING INTO THE PCI CONFIG SPACE BACK ?????????? */ | |
1405 | } else { | |
1406 | /* This is Memory */ | |
1da177e4 LT |
1407 | if (start_address & PCI_BASE_ADDRESS_MEM_PREFETCH) { |
1408 | /* pfmem */ | |
034ecc72 | 1409 | start_address &= PCI_BASE_ADDRESS_MEM_MASK; |
1da177e4 LT |
1410 | if (ibmphp_find_resource (bus, start_address, &pfmem, PFMEM) < 0) { |
1411 | err ("cannot find corresponding PFMEM resource to remove\n"); | |
1412 | return -EINVAL; | |
1413 | } | |
1414 | if (pfmem) { | |
1415 | debug ("pfmem->start = %x\n", pfmem->start); | |
1416 | ||
1417 | ibmphp_remove_resource(pfmem); | |
1418 | } | |
1419 | } else { | |
1420 | /* regular memory */ | |
034ecc72 | 1421 | start_address &= PCI_BASE_ADDRESS_MEM_MASK; |
1da177e4 LT |
1422 | if (ibmphp_find_resource (bus, start_address, &mem, MEM) < 0) { |
1423 | err ("cannot find corresponding MEM resource to remove\n"); | |
1424 | return -EINVAL; | |
1425 | } | |
1426 | if (mem) { | |
1427 | debug ("mem->start = %x\n", mem->start); | |
1428 | ||
1429 | ibmphp_remove_resource(mem); | |
1430 | } | |
1431 | } | |
1432 | if (tmp_address & PCI_BASE_ADDRESS_MEM_TYPE_64) { | |
1433 | /* takes up another dword */ | |
1434 | count += 1; | |
1435 | } | |
1436 | } /* end of mem */ | |
1437 | } /* end of for */ | |
66bef8c0 | 1438 | debug ("%s - exiting, returning success\n", __func__); |
1da177e4 LT |
1439 | return 0; |
1440 | } | |
1441 | ||
1442 | static int unconfigure_boot_card (struct slot *slot_cur) | |
1443 | { | |
1444 | u16 vendor_id; | |
1445 | u32 class; | |
1446 | u8 hdr_type; | |
1447 | u8 device; | |
1448 | u8 busno; | |
1449 | u8 function; | |
1450 | int rc; | |
1451 | unsigned int devfn; | |
1452 | u8 valid_device = 0x00; /* To see if we are ever able to find valid device and read it */ | |
1453 | ||
66bef8c0 | 1454 | debug ("%s - enter\n", __func__); |
1da177e4 LT |
1455 | |
1456 | device = slot_cur->device; | |
1457 | busno = slot_cur->bus; | |
1458 | ||
1459 | debug ("b4 for loop, device is %x\n", device); | |
1460 | /* For every function on the card */ | |
1461 | for (function = 0x0; function < 0x08; function++) { | |
1462 | devfn = PCI_DEVFN(device, function); | |
1463 | ibmphp_pci_bus->number = busno; | |
1464 | ||
1465 | pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_VENDOR_ID, &vendor_id); | |
1466 | ||
1467 | if (vendor_id != PCI_VENDOR_ID_NOTVALID) { | |
1468 | /* found correct device!!! */ | |
1469 | ++valid_device; | |
1470 | ||
66bef8c0 | 1471 | debug ("%s - found correct device\n", __func__); |
1da177e4 LT |
1472 | |
1473 | /* header: x x x x x x x x | |
1474 | * | |___________|=> 1=PPB bridge, 0=normal device, 2=CardBus Bridge | |
1475 | * |_=> 0 = single function device, 1 = multi-function device | |
1476 | */ | |
1477 | ||
1478 | pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_HEADER_TYPE, &hdr_type); | |
1479 | pci_bus_read_config_dword (ibmphp_pci_bus, devfn, PCI_CLASS_REVISION, &class); | |
1480 | ||
1481 | debug ("hdr_type %x, class %x\n", hdr_type, class); | |
1482 | class >>= 8; /* to take revision out, class = class.subclass.prog i/f */ | |
1483 | if (class == PCI_CLASS_NOT_DEFINED_VGA) { | |
227f0647 | 1484 | err ("The device %x function %x is VGA compatible and is not supported for hot removing. Please choose another device.\n", device, function); |
1da177e4 LT |
1485 | return -ENODEV; |
1486 | } else if (class == PCI_CLASS_DISPLAY_VGA) { | |
227f0647 | 1487 | err ("The device %x function %x is not supported for hot removing. Please choose another device.\n", device, function); |
1da177e4 LT |
1488 | return -ENODEV; |
1489 | } | |
1490 | ||
1491 | switch (hdr_type) { | |
1492 | case PCI_HEADER_TYPE_NORMAL: | |
1493 | rc = unconfigure_boot_device (busno, device, function); | |
1494 | if (rc) { | |
1495 | err ("was not able to unconfigure device %x func %x on bus %x. bailing out...\n", | |
1496 | device, function, busno); | |
1497 | return rc; | |
1498 | } | |
1499 | function = 0x8; | |
1500 | break; | |
1501 | case PCI_HEADER_TYPE_MULTIDEVICE: | |
1502 | rc = unconfigure_boot_device (busno, device, function); | |
1503 | if (rc) { | |
1504 | err ("was not able to unconfigure device %x func %x on bus %x. bailing out...\n", | |
1505 | device, function, busno); | |
1506 | return rc; | |
1507 | } | |
1508 | break; | |
1509 | case PCI_HEADER_TYPE_BRIDGE: | |
1510 | class >>= 8; | |
1511 | if (class != PCI_CLASS_BRIDGE_PCI) { | |
227f0647 | 1512 | err ("This device %x function %x is not PCI-to-PCI bridge, and is not supported for hot-removing. Please try another card.\n", device, function); |
1da177e4 LT |
1513 | return -ENODEV; |
1514 | } | |
1515 | rc = unconfigure_boot_bridge (busno, device, function); | |
1516 | if (rc != 0) { | |
1517 | err ("was not able to hot-remove PPB properly.\n"); | |
1518 | return rc; | |
1519 | } | |
1520 | ||
1521 | function = 0x8; | |
1522 | break; | |
1523 | case PCI_HEADER_TYPE_MULTIBRIDGE: | |
1524 | class >>= 8; | |
1525 | if (class != PCI_CLASS_BRIDGE_PCI) { | |
227f0647 | 1526 | err ("This device %x function %x is not PCI-to-PCI bridge, and is not supported for hot-removing. Please try another card.\n", device, function); |
1da177e4 LT |
1527 | return -ENODEV; |
1528 | } | |
1529 | rc = unconfigure_boot_bridge (busno, device, function); | |
1530 | if (rc != 0) { | |
1531 | err ("was not able to hot-remove PPB properly.\n"); | |
1532 | return rc; | |
1533 | } | |
1534 | break; | |
1535 | default: | |
1536 | err ("MAJOR PROBLEM!!!! Cannot read device's header\n"); | |
1537 | return -1; | |
1538 | break; | |
1539 | } /* end of switch */ | |
1540 | } /* end of valid device */ | |
1541 | } /* end of for */ | |
1542 | ||
1543 | if (!valid_device) { | |
1544 | err ("Could not find device to unconfigure. Or could not read the card.\n"); | |
1545 | return -1; | |
1546 | } | |
1547 | return 0; | |
1548 | } | |
1549 | ||
1550 | /* | |
1551 | * free the resources of the card (multi, single, or bridged) | |
1552 | * Parameters: slot, flag to say if this is for removing entire module or just | |
1553 | * unconfiguring the device | |
1554 | * TO DO: will probably need to add some code in case there was some resource, | |
1555 | * to remove it... this is from when we have errors in the configure_card... | |
f7625980 BH |
1556 | * !!!!!!!!!!!!!!!!!!!!!!!!!FOR BUSES!!!!!!!!!!!! |
1557 | * Returns: 0, -1, -ENODEV | |
1da177e4 LT |
1558 | */ |
1559 | int ibmphp_unconfigure_card (struct slot **slot_cur, int the_end) | |
1560 | { | |
1561 | int i; | |
1562 | int count; | |
1563 | int rc; | |
1564 | struct slot *sl = *slot_cur; | |
1565 | struct pci_func *cur_func = NULL; | |
1566 | struct pci_func *temp_func; | |
1567 | ||
66bef8c0 | 1568 | debug ("%s - enter\n", __func__); |
1da177e4 LT |
1569 | |
1570 | if (!the_end) { | |
1571 | /* Need to unconfigure the card */ | |
1572 | rc = unconfigure_boot_card (sl); | |
1573 | if ((rc == -ENODEV) || (rc == -EIO) || (rc == -EINVAL)) { | |
1574 | /* In all other cases, will still need to get rid of func structure if it exists */ | |
1575 | return rc; | |
1576 | } | |
1577 | } | |
1578 | ||
1579 | if (sl->func) { | |
1580 | cur_func = sl->func; | |
1581 | while (cur_func) { | |
1582 | /* TO DO: WILL MOST LIKELY NEED TO GET RID OF THE BUS STRUCTURE FROM RESOURCES AS WELL */ | |
1583 | if (cur_func->bus) { | |
1584 | /* in other words, it's a PPB */ | |
1585 | count = 2; | |
1586 | } else { | |
1587 | count = 6; | |
1588 | } | |
1589 | ||
1590 | for (i = 0; i < count; i++) { | |
1591 | if (cur_func->io[i]) { | |
1592 | debug ("io[%d] exists\n", i); | |
1593 | if (the_end > 0) | |
1594 | ibmphp_remove_resource (cur_func->io[i]); | |
1595 | cur_func->io[i] = NULL; | |
1596 | } | |
1597 | if (cur_func->mem[i]) { | |
1598 | debug ("mem[%d] exists\n", i); | |
1599 | if (the_end > 0) | |
1600 | ibmphp_remove_resource (cur_func->mem[i]); | |
1601 | cur_func->mem[i] = NULL; | |
1602 | } | |
1603 | if (cur_func->pfmem[i]) { | |
1604 | debug ("pfmem[%d] exists\n", i); | |
1605 | if (the_end > 0) | |
1606 | ibmphp_remove_resource (cur_func->pfmem[i]); | |
1607 | cur_func->pfmem[i] = NULL; | |
1608 | } | |
1609 | } | |
1610 | ||
1611 | temp_func = cur_func->next; | |
1612 | kfree (cur_func); | |
1613 | cur_func = temp_func; | |
1614 | } | |
1615 | } | |
1616 | ||
1617 | sl->func = NULL; | |
1618 | *slot_cur = sl; | |
66bef8c0 | 1619 | debug ("%s - exit\n", __func__); |
1da177e4 LT |
1620 | return 0; |
1621 | } | |
1622 | ||
1623 | /* | |
1624 | * add a new bus resulting from hot-plugging a PPB bridge with devices | |
1625 | * | |
1626 | * Input: bus and the amount of resources needed (we know we can assign those, | |
1627 | * since they've been checked already | |
1628 | * Output: bus added to the correct spot | |
f7625980 | 1629 | * 0, -1, error |
1da177e4 LT |
1630 | */ |
1631 | static int add_new_bus (struct bus_node *bus, struct resource_node *io, struct resource_node *mem, struct resource_node *pfmem, u8 parent_busno) | |
1632 | { | |
1633 | struct range_node *io_range = NULL; | |
1634 | struct range_node *mem_range = NULL; | |
1635 | struct range_node *pfmem_range = NULL; | |
1636 | struct bus_node *cur_bus = NULL; | |
1637 | ||
1638 | /* Trying to find the parent bus number */ | |
1639 | if (parent_busno != 0xFF) { | |
1640 | cur_bus = ibmphp_find_res_bus (parent_busno); | |
1641 | if (!cur_bus) { | |
1642 | err ("strange, cannot find bus which is supposed to be at the system... something is terribly wrong...\n"); | |
1643 | return -ENODEV; | |
1644 | } | |
f7625980 | 1645 | |
1da177e4 LT |
1646 | list_add (&bus->bus_list, &cur_bus->bus_list); |
1647 | } | |
1648 | if (io) { | |
f5afe806 | 1649 | io_range = kzalloc(sizeof(*io_range), GFP_KERNEL); |
1da177e4 LT |
1650 | if (!io_range) { |
1651 | err ("out of system memory\n"); | |
1652 | return -ENOMEM; | |
1653 | } | |
1da177e4 LT |
1654 | io_range->start = io->start; |
1655 | io_range->end = io->end; | |
1656 | io_range->rangeno = 1; | |
1657 | bus->noIORanges = 1; | |
1658 | bus->rangeIO = io_range; | |
1659 | } | |
1660 | if (mem) { | |
f5afe806 | 1661 | mem_range = kzalloc(sizeof(*mem_range), GFP_KERNEL); |
1da177e4 LT |
1662 | if (!mem_range) { |
1663 | err ("out of system memory\n"); | |
1664 | return -ENOMEM; | |
1665 | } | |
1da177e4 LT |
1666 | mem_range->start = mem->start; |
1667 | mem_range->end = mem->end; | |
1668 | mem_range->rangeno = 1; | |
1669 | bus->noMemRanges = 1; | |
1670 | bus->rangeMem = mem_range; | |
1671 | } | |
1672 | if (pfmem) { | |
f5afe806 | 1673 | pfmem_range = kzalloc(sizeof(*pfmem_range), GFP_KERNEL); |
f7625980 | 1674 | if (!pfmem_range) { |
1da177e4 LT |
1675 | err ("out of system memory\n"); |
1676 | return -ENOMEM; | |
1677 | } | |
1da177e4 LT |
1678 | pfmem_range->start = pfmem->start; |
1679 | pfmem_range->end = pfmem->end; | |
1680 | pfmem_range->rangeno = 1; | |
1681 | bus->noPFMemRanges = 1; | |
1682 | bus->rangePFMem = pfmem_range; | |
1683 | } | |
1684 | return 0; | |
1685 | } | |
1686 | ||
1687 | /* | |
1688 | * find the 1st available bus number for PPB to set as its secondary bus | |
1689 | * Parameters: bus_number of the primary bus | |
1690 | * Returns: bus_number of the secondary bus or 0xff in case of failure | |
1691 | */ | |
1692 | static u8 find_sec_number (u8 primary_busno, u8 slotno) | |
1693 | { | |
1694 | int min, max; | |
1695 | u8 busno; | |
1696 | struct bus_info *bus; | |
1697 | struct bus_node *bus_cur; | |
1698 | ||
1699 | bus = ibmphp_find_same_bus_num (primary_busno); | |
1700 | if (!bus) { | |
1701 | err ("cannot get slot range of the bus from the BIOS\n"); | |
1702 | return 0xff; | |
1703 | } | |
1704 | max = bus->slot_max; | |
1705 | min = bus->slot_min; | |
1706 | if ((slotno > max) || (slotno < min)) { | |
1707 | err ("got the wrong range\n"); | |
1708 | return 0xff; | |
1709 | } | |
1710 | busno = (u8) (slotno - (u8) min); | |
1711 | busno += primary_busno + 0x01; | |
1712 | bus_cur = ibmphp_find_res_bus (busno); | |
1713 | /* either there is no such bus number, or there are no ranges, which | |
1714 | * can only happen if we removed the bridged device in previous load | |
1715 | * of the driver, and now only have the skeleton bus struct | |
1716 | */ | |
1717 | if ((!bus_cur) || (!(bus_cur->rangeIO) && !(bus_cur->rangeMem) && !(bus_cur->rangePFMem))) | |
1718 | return busno; | |
1719 | return 0xff; | |
1720 | } |