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