1
2
3
4
5
6
7
8
9#include <linux/kernel.h>
10#include <linux/pci.h>
11#include <linux/string.h>
12#include <linux/export.h>
13#include <linux/init.h>
14#include <linux/gfp.h>
15
16#include <asm/io.h>
17#include <asm/prom.h>
18#include <asm/pci-bridge.h>
19#include <asm/ppc-pci.h>
20#include <asm/firmware.h>
21#include <asm/eeh.h>
22
23
24
25
26
27
28
29
30static struct pci_dn *pci_bus_to_pdn(struct pci_bus *bus)
31{
32 struct pci_bus *pbus;
33 struct device_node *dn;
34 struct pci_dn *pdn;
35
36
37
38
39
40 pbus = bus;
41 while (pbus) {
42 if (pci_is_root_bus(pbus) || pbus->self)
43 break;
44
45 pbus = pbus->parent;
46 }
47
48
49
50
51
52 dn = pci_bus_to_OF_node(pbus);
53 pdn = dn ? PCI_DN(dn) : NULL;
54
55 return pdn;
56}
57
58struct pci_dn *pci_get_pdn_by_devfn(struct pci_bus *bus,
59 int devfn)
60{
61 struct device_node *dn = NULL;
62 struct pci_dn *parent, *pdn;
63 struct pci_dev *pdev = NULL;
64
65
66 list_for_each_entry(pdev, &bus->devices, bus_list) {
67 if (pdev->devfn == devfn) {
68 if (pdev->dev.archdata.pci_data)
69 return pdev->dev.archdata.pci_data;
70
71 dn = pci_device_to_OF_node(pdev);
72 break;
73 }
74 }
75
76
77 pdn = dn ? PCI_DN(dn) : NULL;
78 if (pdn)
79 return pdn;
80
81
82 parent = pci_bus_to_pdn(bus);
83 if (!parent)
84 return NULL;
85
86 list_for_each_entry(pdn, &parent->child_list, list) {
87 if (pdn->busno == bus->number &&
88 pdn->devfn == devfn)
89 return pdn;
90 }
91
92 return NULL;
93}
94
95struct pci_dn *pci_get_pdn(struct pci_dev *pdev)
96{
97 struct device_node *dn;
98 struct pci_dn *parent, *pdn;
99
100
101 if (pdev->dev.archdata.pci_data)
102 return pdev->dev.archdata.pci_data;
103
104
105 dn = pci_device_to_OF_node(pdev);
106 pdn = dn ? PCI_DN(dn) : NULL;
107 if (pdn)
108 return pdn;
109
110
111
112
113
114 parent = pci_bus_to_pdn(pdev->bus);
115 if (!parent)
116 return NULL;
117
118 list_for_each_entry(pdn, &parent->child_list, list) {
119 if (pdn->busno == pdev->bus->number &&
120 pdn->devfn == pdev->devfn)
121 return pdn;
122 }
123
124 return NULL;
125}
126
127#ifdef CONFIG_PCI_IOV
128static struct pci_dn *add_one_dev_pci_data(struct pci_dn *parent,
129 int vf_index,
130 int busno, int devfn)
131{
132 struct pci_dn *pdn;
133
134
135 if (!parent)
136 return NULL;
137
138 pdn = kzalloc(sizeof(*pdn), GFP_KERNEL);
139 if (!pdn)
140 return NULL;
141
142 pdn->phb = parent->phb;
143 pdn->parent = parent;
144 pdn->busno = busno;
145 pdn->devfn = devfn;
146 pdn->vf_index = vf_index;
147 pdn->pe_number = IODA_INVALID_PE;
148 INIT_LIST_HEAD(&pdn->child_list);
149 INIT_LIST_HEAD(&pdn->list);
150 list_add_tail(&pdn->list, &parent->child_list);
151
152 return pdn;
153}
154#endif
155
156struct pci_dn *add_dev_pci_data(struct pci_dev *pdev)
157{
158#ifdef CONFIG_PCI_IOV
159 struct pci_dn *parent, *pdn;
160 int i;
161
162
163 if (!pdev->is_physfn)
164 return pci_get_pdn(pdev);
165
166
167 pdn = pci_get_pdn(pdev);
168 if (!pdn || (pdn->flags & PCI_DN_FLAG_IOV_VF))
169 return NULL;
170
171 pdn->flags |= PCI_DN_FLAG_IOV_VF;
172 parent = pci_bus_to_pdn(pdev->bus);
173 if (!parent)
174 return NULL;
175
176 for (i = 0; i < pci_sriov_get_totalvfs(pdev); i++) {
177 struct eeh_dev *edev __maybe_unused;
178
179 pdn = add_one_dev_pci_data(parent, i,
180 pci_iov_virtfn_bus(pdev, i),
181 pci_iov_virtfn_devfn(pdev, i));
182 if (!pdn) {
183 dev_warn(&pdev->dev, "%s: Cannot create firmware data for VF#%d\n",
184 __func__, i);
185 return NULL;
186 }
187
188#ifdef CONFIG_EEH
189
190 edev = eeh_dev_init(pdn);
191 BUG_ON(!edev);
192 edev->physfn = pdev;
193#endif
194 }
195#endif
196
197 return pci_get_pdn(pdev);
198}
199
200void remove_dev_pci_data(struct pci_dev *pdev)
201{
202#ifdef CONFIG_PCI_IOV
203 struct pci_dn *parent;
204 struct pci_dn *pdn, *tmp;
205 int i;
206
207
208
209
210
211
212 if (pdev->is_virtfn) {
213 pdn = pci_get_pdn(pdev);
214 pdn->pe_number = IODA_INVALID_PE;
215 return;
216 }
217
218
219 if (!pdev->is_physfn)
220 return;
221
222
223 pdn = pci_get_pdn(pdev);
224 if (!pdn || !(pdn->flags & PCI_DN_FLAG_IOV_VF))
225 return;
226
227 pdn->flags &= ~PCI_DN_FLAG_IOV_VF;
228 parent = pci_bus_to_pdn(pdev->bus);
229 if (!parent)
230 return;
231
232
233
234
235
236
237 for (i = 0; i < pci_sriov_get_totalvfs(pdev); i++) {
238 struct eeh_dev *edev __maybe_unused;
239
240 list_for_each_entry_safe(pdn, tmp,
241 &parent->child_list, list) {
242 if (pdn->busno != pci_iov_virtfn_bus(pdev, i) ||
243 pdn->devfn != pci_iov_virtfn_devfn(pdev, i))
244 continue;
245
246#ifdef CONFIG_EEH
247
248 edev = pdn_to_eeh_dev(pdn);
249 if (edev) {
250 pdn->edev = NULL;
251 kfree(edev);
252 }
253#endif
254
255 if (!list_empty(&pdn->list))
256 list_del(&pdn->list);
257
258 kfree(pdn);
259 }
260 }
261#endif
262}
263
264struct pci_dn *pci_add_device_node_info(struct pci_controller *hose,
265 struct device_node *dn)
266{
267 const __be32 *type = of_get_property(dn, "ibm,pci-config-space-type", NULL);
268 const __be32 *regs;
269 struct device_node *parent;
270 struct pci_dn *pdn;
271#ifdef CONFIG_EEH
272 struct eeh_dev *edev;
273#endif
274
275 pdn = kzalloc(sizeof(*pdn), GFP_KERNEL);
276 if (pdn == NULL)
277 return NULL;
278 dn->data = pdn;
279 pdn->phb = hose;
280 pdn->pe_number = IODA_INVALID_PE;
281 regs = of_get_property(dn, "reg", NULL);
282 if (regs) {
283 u32 addr = of_read_number(regs, 1);
284
285
286 pdn->busno = (addr >> 16) & 0xff;
287 pdn->devfn = (addr >> 8) & 0xff;
288 }
289
290
291 regs = of_get_property(dn, "vendor-id", NULL);
292 pdn->vendor_id = regs ? of_read_number(regs, 1) : 0;
293 regs = of_get_property(dn, "device-id", NULL);
294 pdn->device_id = regs ? of_read_number(regs, 1) : 0;
295 regs = of_get_property(dn, "class-code", NULL);
296 pdn->class_code = regs ? of_read_number(regs, 1) : 0;
297
298
299 pdn->pci_ext_config_space = (type && of_read_number(type, 1) == 1);
300
301
302#ifdef CONFIG_EEH
303 edev = eeh_dev_init(pdn);
304 if (!edev) {
305 kfree(pdn);
306 return NULL;
307 }
308#endif
309
310
311 INIT_LIST_HEAD(&pdn->child_list);
312 INIT_LIST_HEAD(&pdn->list);
313 parent = of_get_parent(dn);
314 pdn->parent = parent ? PCI_DN(parent) : NULL;
315 if (pdn->parent)
316 list_add_tail(&pdn->list, &pdn->parent->child_list);
317
318 return pdn;
319}
320EXPORT_SYMBOL_GPL(pci_add_device_node_info);
321
322void pci_remove_device_node_info(struct device_node *dn)
323{
324 struct pci_dn *pdn = dn ? PCI_DN(dn) : NULL;
325 struct device_node *parent;
326#ifdef CONFIG_EEH
327 struct eeh_dev *edev = pdn_to_eeh_dev(pdn);
328
329 if (edev)
330 edev->pdn = NULL;
331#endif
332
333 if (!pdn)
334 return;
335
336 WARN_ON(!list_empty(&pdn->child_list));
337 list_del(&pdn->list);
338
339 parent = of_get_parent(dn);
340 if (parent)
341 of_node_put(parent);
342
343 dn->data = NULL;
344 kfree(pdn);
345}
346EXPORT_SYMBOL_GPL(pci_remove_device_node_info);
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366void *pci_traverse_device_nodes(struct device_node *start,
367 void *(*fn)(struct device_node *, void *),
368 void *data)
369{
370 struct device_node *dn, *nextdn;
371 void *ret;
372
373
374 for (dn = start->child; dn; dn = nextdn) {
375 const __be32 *classp;
376 u32 class = 0;
377
378 nextdn = NULL;
379 classp = of_get_property(dn, "class-code", NULL);
380 if (classp)
381 class = of_read_number(classp, 1);
382
383 if (fn) {
384 ret = fn(dn, data);
385 if (ret)
386 return ret;
387 }
388
389
390 if (dn->child && ((class >> 8) == PCI_CLASS_BRIDGE_PCI ||
391 (class >> 8) == PCI_CLASS_BRIDGE_CARDBUS))
392
393 nextdn = dn->child;
394 else if (dn->sibling)
395
396 nextdn = dn->sibling;
397 if (!nextdn) {
398
399 do {
400 dn = dn->parent;
401 if (dn == start)
402 return NULL;
403 } while (dn->sibling == NULL);
404 nextdn = dn->sibling;
405 }
406 }
407 return NULL;
408}
409EXPORT_SYMBOL_GPL(pci_traverse_device_nodes);
410
411static struct pci_dn *pci_dn_next_one(struct pci_dn *root,
412 struct pci_dn *pdn)
413{
414 struct list_head *next = pdn->child_list.next;
415
416 if (next != &pdn->child_list)
417 return list_entry(next, struct pci_dn, list);
418
419 while (1) {
420 if (pdn == root)
421 return NULL;
422
423 next = pdn->list.next;
424 if (next != &pdn->parent->child_list)
425 break;
426
427 pdn = pdn->parent;
428 }
429
430 return list_entry(next, struct pci_dn, list);
431}
432
433void *traverse_pci_dn(struct pci_dn *root,
434 void *(*fn)(struct pci_dn *, void *),
435 void *data)
436{
437 struct pci_dn *pdn = root;
438 void *ret;
439
440
441 for (pdn = pci_dn_next_one(root, pdn); pdn;
442 pdn = pci_dn_next_one(root, pdn)) {
443 ret = fn(pdn, data);
444 if (ret)
445 return ret;
446 }
447
448 return NULL;
449}
450
451static void *add_pdn(struct device_node *dn, void *data)
452{
453 struct pci_controller *hose = data;
454 struct pci_dn *pdn;
455
456 pdn = pci_add_device_node_info(hose, dn);
457 if (!pdn)
458 return ERR_PTR(-ENOMEM);
459
460 return NULL;
461}
462
463
464
465
466
467
468
469
470
471void pci_devs_phb_init_dynamic(struct pci_controller *phb)
472{
473 struct device_node *dn = phb->dn;
474 struct pci_dn *pdn;
475
476
477 pdn = pci_add_device_node_info(phb, dn);
478 if (pdn) {
479 pdn->devfn = pdn->busno = -1;
480 pdn->vendor_id = pdn->device_id = pdn->class_code = 0;
481 pdn->phb = phb;
482 phb->pci_data = pdn;
483 }
484
485
486 pci_traverse_device_nodes(dn, add_pdn, phb);
487}
488
489
490
491
492
493
494
495
496
497
498static int __init pci_devs_phb_init(void)
499{
500 struct pci_controller *phb, *tmp;
501
502
503 list_for_each_entry_safe(phb, tmp, &hose_list, list_node)
504 pci_devs_phb_init_dynamic(phb);
505
506 return 0;
507}
508
509core_initcall(pci_devs_phb_init);
510
511static void pci_dev_pdn_setup(struct pci_dev *pdev)
512{
513 struct pci_dn *pdn;
514
515 if (pdev->dev.archdata.pci_data)
516 return;
517
518
519 pdn = pci_get_pdn(pdev);
520 pdev->dev.archdata.pci_data = pdn;
521}
522DECLARE_PCI_FIXUP_EARLY(PCI_ANY_ID, PCI_ANY_ID, pci_dev_pdn_setup);
523