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1// SPDX-License-Identifier: GPL-2.0
2/* pci.c: UltraSparc PCI controller support.
3 *
4 * Copyright (C) 1997, 1998, 1999 David S. Miller (davem@redhat.com)
5 * Copyright (C) 1998, 1999 Eddie C. Dost (ecd@skynet.be)
6 * Copyright (C) 1999 Jakub Jelinek (jj@ultra.linux.cz)
7 *
8 * OF tree based PCI bus probing taken from the PowerPC port
9 * with minor modifications, see there for credits.
10 */
11
12#include <linux/export.h>
13#include <linux/kernel.h>
14#include <linux/string.h>
15#include <linux/sched.h>
16#include <linux/capability.h>
17#include <linux/errno.h>
18#include <linux/pci.h>
19#include <linux/msi.h>
20#include <linux/irq.h>
21#include <linux/init.h>
22#include <linux/of.h>
23#include <linux/of_device.h>
24
25#include <linux/uaccess.h>
26#include <asm/pgtable.h>
27#include <asm/irq.h>
28#include <asm/prom.h>
29#include <asm/apb.h>
30
31#include "pci_impl.h"
32#include "kernel.h"
33
34/* List of all PCI controllers found in the system. */
35struct pci_pbm_info *pci_pbm_root = NULL;
36
37/* Each PBM found gets a unique index. */
38int pci_num_pbms = 0;
39
40volatile int pci_poke_in_progress;
41volatile int pci_poke_cpu = -1;
42volatile int pci_poke_faulted;
43
44static DEFINE_SPINLOCK(pci_poke_lock);
45
46void pci_config_read8(u8 *addr, u8 *ret)
47{
48 unsigned long flags;
49 u8 byte;
50
51 spin_lock_irqsave(&pci_poke_lock, flags);
52 pci_poke_cpu = smp_processor_id();
53 pci_poke_in_progress = 1;
54 pci_poke_faulted = 0;
55 __asm__ __volatile__("membar #Sync\n\t"
56 "lduba [%1] %2, %0\n\t"
57 "membar #Sync"
58 : "=r" (byte)
59 : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
60 : "memory");
61 pci_poke_in_progress = 0;
62 pci_poke_cpu = -1;
63 if (!pci_poke_faulted)
64 *ret = byte;
65 spin_unlock_irqrestore(&pci_poke_lock, flags);
66}
67
68void pci_config_read16(u16 *addr, u16 *ret)
69{
70 unsigned long flags;
71 u16 word;
72
73 spin_lock_irqsave(&pci_poke_lock, flags);
74 pci_poke_cpu = smp_processor_id();
75 pci_poke_in_progress = 1;
76 pci_poke_faulted = 0;
77 __asm__ __volatile__("membar #Sync\n\t"
78 "lduha [%1] %2, %0\n\t"
79 "membar #Sync"
80 : "=r" (word)
81 : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
82 : "memory");
83 pci_poke_in_progress = 0;
84 pci_poke_cpu = -1;
85 if (!pci_poke_faulted)
86 *ret = word;
87 spin_unlock_irqrestore(&pci_poke_lock, flags);
88}
89
90void pci_config_read32(u32 *addr, u32 *ret)
91{
92 unsigned long flags;
93 u32 dword;
94
95 spin_lock_irqsave(&pci_poke_lock, flags);
96 pci_poke_cpu = smp_processor_id();
97 pci_poke_in_progress = 1;
98 pci_poke_faulted = 0;
99 __asm__ __volatile__("membar #Sync\n\t"
100 "lduwa [%1] %2, %0\n\t"
101 "membar #Sync"
102 : "=r" (dword)
103 : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
104 : "memory");
105 pci_poke_in_progress = 0;
106 pci_poke_cpu = -1;
107 if (!pci_poke_faulted)
108 *ret = dword;
109 spin_unlock_irqrestore(&pci_poke_lock, flags);
110}
111
112void pci_config_write8(u8 *addr, u8 val)
113{
114 unsigned long flags;
115
116 spin_lock_irqsave(&pci_poke_lock, flags);
117 pci_poke_cpu = smp_processor_id();
118 pci_poke_in_progress = 1;
119 pci_poke_faulted = 0;
120 __asm__ __volatile__("membar #Sync\n\t"
121 "stba %0, [%1] %2\n\t"
122 "membar #Sync"
123 : /* no outputs */
124 : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
125 : "memory");
126 pci_poke_in_progress = 0;
127 pci_poke_cpu = -1;
128 spin_unlock_irqrestore(&pci_poke_lock, flags);
129}
130
131void pci_config_write16(u16 *addr, u16 val)
132{
133 unsigned long flags;
134
135 spin_lock_irqsave(&pci_poke_lock, flags);
136 pci_poke_cpu = smp_processor_id();
137 pci_poke_in_progress = 1;
138 pci_poke_faulted = 0;
139 __asm__ __volatile__("membar #Sync\n\t"
140 "stha %0, [%1] %2\n\t"
141 "membar #Sync"
142 : /* no outputs */
143 : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
144 : "memory");
145 pci_poke_in_progress = 0;
146 pci_poke_cpu = -1;
147 spin_unlock_irqrestore(&pci_poke_lock, flags);
148}
149
150void pci_config_write32(u32 *addr, u32 val)
151{
152 unsigned long flags;
153
154 spin_lock_irqsave(&pci_poke_lock, flags);
155 pci_poke_cpu = smp_processor_id();
156 pci_poke_in_progress = 1;
157 pci_poke_faulted = 0;
158 __asm__ __volatile__("membar #Sync\n\t"
159 "stwa %0, [%1] %2\n\t"
160 "membar #Sync"
161 : /* no outputs */
162 : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
163 : "memory");
164 pci_poke_in_progress = 0;
165 pci_poke_cpu = -1;
166 spin_unlock_irqrestore(&pci_poke_lock, flags);
167}
168
169static int ofpci_verbose;
170
171static int __init ofpci_debug(char *str)
172{
173 int val = 0;
174
175 get_option(&str, &val);
176 if (val)
177 ofpci_verbose = 1;
178 return 1;
179}
180
181__setup("ofpci_debug=", ofpci_debug);
182
183static unsigned long pci_parse_of_flags(u32 addr0)
184{
185 unsigned long flags = 0;
186
187 if (addr0 & 0x02000000) {
188 flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY;
189 flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M;
190 if (addr0 & 0x01000000)
191 flags |= IORESOURCE_MEM_64
192 | PCI_BASE_ADDRESS_MEM_TYPE_64;
193 if (addr0 & 0x40000000)
194 flags |= IORESOURCE_PREFETCH
195 | PCI_BASE_ADDRESS_MEM_PREFETCH;
196 } else if (addr0 & 0x01000000)
197 flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO;
198 return flags;
199}
200
201/* The of_device layer has translated all of the assigned-address properties
202 * into physical address resources, we only have to figure out the register
203 * mapping.
204 */
205static void pci_parse_of_addrs(struct platform_device *op,
206 struct device_node *node,
207 struct pci_dev *dev)
208{
209 struct resource *op_res;
210 const u32 *addrs;
211 int proplen;
212
213 addrs = of_get_property(node, "assigned-addresses", &proplen);
214 if (!addrs)
215 return;
216 if (ofpci_verbose)
217 printk(" parse addresses (%d bytes) @ %p\n",
218 proplen, addrs);
219 op_res = &op->resource[0];
220 for (; proplen >= 20; proplen -= 20, addrs += 5, op_res++) {
221 struct resource *res;
222 unsigned long flags;
223 int i;
224
225 flags = pci_parse_of_flags(addrs[0]);
226 if (!flags)
227 continue;
228 i = addrs[0] & 0xff;
229 if (ofpci_verbose)
230 printk(" start: %llx, end: %llx, i: %x\n",
231 op_res->start, op_res->end, i);
232
233 if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) {
234 res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2];
235 } else if (i == dev->rom_base_reg) {
236 res = &dev->resource[PCI_ROM_RESOURCE];
237 flags |= IORESOURCE_READONLY | IORESOURCE_SIZEALIGN;
238 } else {
239 printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i);
240 continue;
241 }
242 res->start = op_res->start;
243 res->end = op_res->end;
244 res->flags = flags;
245 res->name = pci_name(dev);
246 }
247}
248
249static void pci_init_dev_archdata(struct dev_archdata *sd, void *iommu,
250 void *stc, void *host_controller,
251 struct platform_device *op,
252 int numa_node)
253{
254 sd->iommu = iommu;
255 sd->stc = stc;
256 sd->host_controller = host_controller;
257 sd->op = op;
258 sd->numa_node = numa_node;
259}
260
261static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
262 struct device_node *node,
263 struct pci_bus *bus, int devfn)
264{
265 struct dev_archdata *sd;
266 struct platform_device *op;
267 struct pci_dev *dev;
268 const char *type;
269 u32 class;
270
271 dev = pci_alloc_dev(bus);
272 if (!dev)
273 return NULL;
274
275 op = of_find_device_by_node(node);
276 sd = &dev->dev.archdata;
277 pci_init_dev_archdata(sd, pbm->iommu, &pbm->stc, pbm, op,
278 pbm->numa_node);
279 sd = &op->dev.archdata;
280 sd->iommu = pbm->iommu;
281 sd->stc = &pbm->stc;
282 sd->numa_node = pbm->numa_node;
283
284 if (!strcmp(node->name, "ebus"))
285 of_propagate_archdata(op);
286
287 type = of_get_property(node, "device_type", NULL);
288 if (type == NULL)
289 type = "";
290
291 if (ofpci_verbose)
292 printk(" create device, devfn: %x, type: %s\n",
293 devfn, type);
294
295 dev->sysdata = node;
296 dev->dev.parent = bus->bridge;
297 dev->dev.bus = &pci_bus_type;
298 dev->dev.of_node = of_node_get(node);
299 dev->devfn = devfn;
300 dev->multifunction = 0; /* maybe a lie? */
301 set_pcie_port_type(dev);
302
303 pci_dev_assign_slot(dev);
304 dev->vendor = of_getintprop_default(node, "vendor-id", 0xffff);
305 dev->device = of_getintprop_default(node, "device-id", 0xffff);
306 dev->subsystem_vendor =
307 of_getintprop_default(node, "subsystem-vendor-id", 0);
308 dev->subsystem_device =
309 of_getintprop_default(node, "subsystem-id", 0);
310
311 dev->cfg_size = pci_cfg_space_size(dev);
312
313 /* We can't actually use the firmware value, we have
314 * to read what is in the register right now. One
315 * reason is that in the case of IDE interfaces the
316 * firmware can sample the value before the the IDE
317 * interface is programmed into native mode.
318 */
319 pci_read_config_dword(dev, PCI_CLASS_REVISION, &class);
320 dev->class = class >> 8;
321 dev->revision = class & 0xff;
322
323 dev_set_name(&dev->dev, "%04x:%02x:%02x.%d", pci_domain_nr(bus),
324 dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));
325
326 if (ofpci_verbose)
327 printk(" class: 0x%x device name: %s\n",
328 dev->class, pci_name(dev));
329
330 /* I have seen IDE devices which will not respond to
331 * the bmdma simplex check reads if bus mastering is
332 * disabled.
333 */
334 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
335 pci_set_master(dev);
336
337 dev->current_state = PCI_UNKNOWN; /* unknown power state */
338 dev->error_state = pci_channel_io_normal;
339 dev->dma_mask = 0xffffffff;
340
341 if (!strcmp(node->name, "pci")) {
342 /* a PCI-PCI bridge */
343 dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
344 dev->rom_base_reg = PCI_ROM_ADDRESS1;
345 } else if (!strcmp(type, "cardbus")) {
346 dev->hdr_type = PCI_HEADER_TYPE_CARDBUS;
347 } else {
348 dev->hdr_type = PCI_HEADER_TYPE_NORMAL;
349 dev->rom_base_reg = PCI_ROM_ADDRESS;
350
351 dev->irq = sd->op->archdata.irqs[0];
352 if (dev->irq == 0xffffffff)
353 dev->irq = PCI_IRQ_NONE;
354 }
355
356 pci_parse_of_addrs(sd->op, node, dev);
357
358 if (ofpci_verbose)
359 printk(" adding to system ...\n");
360
361 pci_device_add(dev, bus);
362
363 return dev;
364}
365
366static void apb_calc_first_last(u8 map, u32 *first_p, u32 *last_p)
367{
368 u32 idx, first, last;
369
370 first = 8;
371 last = 0;
372 for (idx = 0; idx < 8; idx++) {
373 if ((map & (1 << idx)) != 0) {
374 if (first > idx)
375 first = idx;
376 if (last < idx)
377 last = idx;
378 }
379 }
380
381 *first_p = first;
382 *last_p = last;
383}
384
385/* Cook up fake bus resources for SUNW,simba PCI bridges which lack
386 * a proper 'ranges' property.
387 */
388static void apb_fake_ranges(struct pci_dev *dev,
389 struct pci_bus *bus,
390 struct pci_pbm_info *pbm)
391{
392 struct pci_bus_region region;
393 struct resource *res;
394 u32 first, last;
395 u8 map;
396
397 pci_read_config_byte(dev, APB_IO_ADDRESS_MAP, &map);
398 apb_calc_first_last(map, &first, &last);
399 res = bus->resource[0];
400 res->flags = IORESOURCE_IO;
401 region.start = (first << 21);
402 region.end = (last << 21) + ((1 << 21) - 1);
403 pcibios_bus_to_resource(dev->bus, res, ®ion);
404
405 pci_read_config_byte(dev, APB_MEM_ADDRESS_MAP, &map);
406 apb_calc_first_last(map, &first, &last);
407 res = bus->resource[1];
408 res->flags = IORESOURCE_MEM;
409 region.start = (first << 29);
410 region.end = (last << 29) + ((1 << 29) - 1);
411 pcibios_bus_to_resource(dev->bus, res, ®ion);
412}
413
414static void pci_of_scan_bus(struct pci_pbm_info *pbm,
415 struct device_node *node,
416 struct pci_bus *bus);
417
418#define GET_64BIT(prop, i) ((((u64) (prop)[(i)]) << 32) | (prop)[(i)+1])
419
420static void of_scan_pci_bridge(struct pci_pbm_info *pbm,
421 struct device_node *node,
422 struct pci_dev *dev)
423{
424 struct pci_bus *bus;
425 const u32 *busrange, *ranges;
426 int len, i, simba;
427 struct pci_bus_region region;
428 struct resource *res;
429 unsigned int flags;
430 u64 size;
431
432 if (ofpci_verbose)
433 printk("of_scan_pci_bridge(%s)\n", node->full_name);
434
435 /* parse bus-range property */
436 busrange = of_get_property(node, "bus-range", &len);
437 if (busrange == NULL || len != 8) {
438 printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n",
439 node->full_name);
440 return;
441 }
442
443 if (ofpci_verbose)
444 printk(" Bridge bus range [%u --> %u]\n",
445 busrange[0], busrange[1]);
446
447 ranges = of_get_property(node, "ranges", &len);
448 simba = 0;
449 if (ranges == NULL) {
450 const char *model = of_get_property(node, "model", NULL);
451 if (model && !strcmp(model, "SUNW,simba"))
452 simba = 1;
453 }
454
455 bus = pci_add_new_bus(dev->bus, dev, busrange[0]);
456 if (!bus) {
457 printk(KERN_ERR "Failed to create pci bus for %s\n",
458 node->full_name);
459 return;
460 }
461
462 bus->primary = dev->bus->number;
463 pci_bus_insert_busn_res(bus, busrange[0], busrange[1]);
464 bus->bridge_ctl = 0;
465
466 if (ofpci_verbose)
467 printk(" Bridge ranges[%p] simba[%d]\n",
468 ranges, simba);
469
470 /* parse ranges property, or cook one up by hand for Simba */
471 /* PCI #address-cells == 3 and #size-cells == 2 always */
472 res = &dev->resource[PCI_BRIDGE_RESOURCES];
473 for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) {
474 res->flags = 0;
475 bus->resource[i] = res;
476 ++res;
477 }
478 if (simba) {
479 apb_fake_ranges(dev, bus, pbm);
480 goto after_ranges;
481 } else if (ranges == NULL) {
482 pci_read_bridge_bases(bus);
483 goto after_ranges;
484 }
485 i = 1;
486 for (; len >= 32; len -= 32, ranges += 8) {
487 u64 start;
488
489 if (ofpci_verbose)
490 printk(" RAW Range[%08x:%08x:%08x:%08x:%08x:%08x:"
491 "%08x:%08x]\n",
492 ranges[0], ranges[1], ranges[2], ranges[3],
493 ranges[4], ranges[5], ranges[6], ranges[7]);
494
495 flags = pci_parse_of_flags(ranges[0]);
496 size = GET_64BIT(ranges, 6);
497 if (flags == 0 || size == 0)
498 continue;
499
500 /* On PCI-Express systems, PCI bridges that have no devices downstream
501 * have a bogus size value where the first 32-bit cell is 0xffffffff.
502 * This results in a bogus range where start + size overflows.
503 *
504 * Just skip these otherwise the kernel will complain when the resource
505 * tries to be claimed.
506 */
507 if (size >> 32 == 0xffffffff)
508 continue;
509
510 if (flags & IORESOURCE_IO) {
511 res = bus->resource[0];
512 if (res->flags) {
513 printk(KERN_ERR "PCI: ignoring extra I/O range"
514 " for bridge %s\n", node->full_name);
515 continue;
516 }
517 } else {
518 if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) {
519 printk(KERN_ERR "PCI: too many memory ranges"
520 " for bridge %s\n", node->full_name);
521 continue;
522 }
523 res = bus->resource[i];
524 ++i;
525 }
526
527 res->flags = flags;
528 region.start = start = GET_64BIT(ranges, 1);
529 region.end = region.start + size - 1;
530
531 if (ofpci_verbose)
532 printk(" Using flags[%08x] start[%016llx] size[%016llx]\n",
533 flags, start, size);
534
535 pcibios_bus_to_resource(dev->bus, res, ®ion);
536 }
537after_ranges:
538 sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus),
539 bus->number);
540 if (ofpci_verbose)
541 printk(" bus name: %s\n", bus->name);
542
543 pci_of_scan_bus(pbm, node, bus);
544}
545
546static void pci_of_scan_bus(struct pci_pbm_info *pbm,
547 struct device_node *node,
548 struct pci_bus *bus)
549{
550 struct device_node *child;
551 const u32 *reg;
552 int reglen, devfn, prev_devfn;
553 struct pci_dev *dev;
554
555 if (ofpci_verbose)
556 printk("PCI: scan_bus[%s] bus no %d\n",
557 node->full_name, bus->number);
558
559 child = NULL;
560 prev_devfn = -1;
561 while ((child = of_get_next_child(node, child)) != NULL) {
562 if (ofpci_verbose)
563 printk(" * %s\n", child->full_name);
564 reg = of_get_property(child, "reg", ®len);
565 if (reg == NULL || reglen < 20)
566 continue;
567
568 devfn = (reg[0] >> 8) & 0xff;
569
570 /* This is a workaround for some device trees
571 * which list PCI devices twice. On the V100
572 * for example, device number 3 is listed twice.
573 * Once as "pm" and once again as "lomp".
574 */
575 if (devfn == prev_devfn)
576 continue;
577 prev_devfn = devfn;
578
579 /* create a new pci_dev for this device */
580 dev = of_create_pci_dev(pbm, child, bus, devfn);
581 if (!dev)
582 continue;
583 if (ofpci_verbose)
584 printk("PCI: dev header type: %x\n",
585 dev->hdr_type);
586
587 if (pci_is_bridge(dev))
588 of_scan_pci_bridge(pbm, child, dev);
589 }
590}
591
592static ssize_t
593show_pciobppath_attr(struct device * dev, struct device_attribute * attr, char * buf)
594{
595 struct pci_dev *pdev;
596 struct device_node *dp;
597
598 pdev = to_pci_dev(dev);
599 dp = pdev->dev.of_node;
600
601 return snprintf (buf, PAGE_SIZE, "%s\n", dp->full_name);
602}
603
604static DEVICE_ATTR(obppath, S_IRUSR | S_IRGRP | S_IROTH, show_pciobppath_attr, NULL);
605
606static void pci_bus_register_of_sysfs(struct pci_bus *bus)
607{
608 struct pci_dev *dev;
609 struct pci_bus *child_bus;
610 int err;
611
612 list_for_each_entry(dev, &bus->devices, bus_list) {
613 /* we don't really care if we can create this file or
614 * not, but we need to assign the result of the call
615 * or the world will fall under alien invasion and
616 * everybody will be frozen on a spaceship ready to be
617 * eaten on alpha centauri by some green and jelly
618 * humanoid.
619 */
620 err = sysfs_create_file(&dev->dev.kobj, &dev_attr_obppath.attr);
621 (void) err;
622 }
623 list_for_each_entry(child_bus, &bus->children, node)
624 pci_bus_register_of_sysfs(child_bus);
625}
626
627static void pci_claim_bus_resources(struct pci_bus *bus)
628{
629 struct pci_bus *child_bus;
630 struct pci_dev *dev;
631
632 list_for_each_entry(dev, &bus->devices, bus_list) {
633 int i;
634
635 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
636 struct resource *r = &dev->resource[i];
637
638 if (r->parent || !r->start || !r->flags)
639 continue;
640
641 if (ofpci_verbose)
642 printk("PCI: Claiming %s: "
643 "Resource %d: %016llx..%016llx [%x]\n",
644 pci_name(dev), i,
645 (unsigned long long)r->start,
646 (unsigned long long)r->end,
647 (unsigned int)r->flags);
648
649 pci_claim_resource(dev, i);
650 }
651 }
652
653 list_for_each_entry(child_bus, &bus->children, node)
654 pci_claim_bus_resources(child_bus);
655}
656
657struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
658 struct device *parent)
659{
660 LIST_HEAD(resources);
661 struct device_node *node = pbm->op->dev.of_node;
662 struct pci_bus *bus;
663
664 printk("PCI: Scanning PBM %s\n", node->full_name);
665
666 pci_add_resource_offset(&resources, &pbm->io_space,
667 pbm->io_offset);
668 pci_add_resource_offset(&resources, &pbm->mem_space,
669 pbm->mem_offset);
670 if (pbm->mem64_space.flags)
671 pci_add_resource_offset(&resources, &pbm->mem64_space,
672 pbm->mem64_offset);
673 pbm->busn.start = pbm->pci_first_busno;
674 pbm->busn.end = pbm->pci_last_busno;
675 pbm->busn.flags = IORESOURCE_BUS;
676 pci_add_resource(&resources, &pbm->busn);
677 bus = pci_create_root_bus(parent, pbm->pci_first_busno, pbm->pci_ops,
678 pbm, &resources);
679 if (!bus) {
680 printk(KERN_ERR "Failed to create bus for %s\n",
681 node->full_name);
682 pci_free_resource_list(&resources);
683 return NULL;
684 }
685
686 pci_of_scan_bus(pbm, node, bus);
687 pci_bus_register_of_sysfs(bus);
688
689 pci_claim_bus_resources(bus);
690 pci_bus_add_devices(bus);
691 return bus;
692}
693
694int pcibios_enable_device(struct pci_dev *dev, int mask)
695{
696 u16 cmd, oldcmd;
697 int i;
698
699 pci_read_config_word(dev, PCI_COMMAND, &cmd);
700 oldcmd = cmd;
701
702 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
703 struct resource *res = &dev->resource[i];
704
705 /* Only set up the requested stuff */
706 if (!(mask & (1<<i)))
707 continue;
708
709 if (res->flags & IORESOURCE_IO)
710 cmd |= PCI_COMMAND_IO;
711 if (res->flags & IORESOURCE_MEM)
712 cmd |= PCI_COMMAND_MEMORY;
713 }
714
715 if (cmd != oldcmd) {
716 printk(KERN_DEBUG "PCI: Enabling device: (%s), cmd %x\n",
717 pci_name(dev), cmd);
718 /* Enable the appropriate bits in the PCI command register. */
719 pci_write_config_word(dev, PCI_COMMAND, cmd);
720 }
721 return 0;
722}
723
724/* Platform support for /proc/bus/pci/X/Y mmap()s. */
725
726/* If the user uses a host-bridge as the PCI device, he may use
727 * this to perform a raw mmap() of the I/O or MEM space behind
728 * that controller.
729 *
730 * This can be useful for execution of x86 PCI bios initialization code
731 * on a PCI card, like the xfree86 int10 stuff does.
732 */
733static int __pci_mmap_make_offset_bus(struct pci_dev *pdev, struct vm_area_struct *vma,
734 enum pci_mmap_state mmap_state)
735{
736 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
737 unsigned long space_size, user_offset, user_size;
738
739 if (mmap_state == pci_mmap_io) {
740 space_size = resource_size(&pbm->io_space);
741 } else {
742 space_size = resource_size(&pbm->mem_space);
743 }
744
745 /* Make sure the request is in range. */
746 user_offset = vma->vm_pgoff << PAGE_SHIFT;
747 user_size = vma->vm_end - vma->vm_start;
748
749 if (user_offset >= space_size ||
750 (user_offset + user_size) > space_size)
751 return -EINVAL;
752
753 if (mmap_state == pci_mmap_io) {
754 vma->vm_pgoff = (pbm->io_space.start +
755 user_offset) >> PAGE_SHIFT;
756 } else {
757 vma->vm_pgoff = (pbm->mem_space.start +
758 user_offset) >> PAGE_SHIFT;
759 }
760
761 return 0;
762}
763
764/* Adjust vm_pgoff of VMA such that it is the physical page offset
765 * corresponding to the 32-bit pci bus offset for DEV requested by the user.
766 *
767 * Basically, the user finds the base address for his device which he wishes
768 * to mmap. They read the 32-bit value from the config space base register,
769 * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
770 * offset parameter of mmap on /proc/bus/pci/XXX for that device.
771 *
772 * Returns negative error code on failure, zero on success.
773 */
774static int __pci_mmap_make_offset(struct pci_dev *pdev,
775 struct vm_area_struct *vma,
776 enum pci_mmap_state mmap_state)
777{
778 unsigned long user_paddr, user_size;
779 int i, err;
780
781 /* First compute the physical address in vma->vm_pgoff,
782 * making sure the user offset is within range in the
783 * appropriate PCI space.
784 */
785 err = __pci_mmap_make_offset_bus(pdev, vma, mmap_state);
786 if (err)
787 return err;
788
789 /* If this is a mapping on a host bridge, any address
790 * is OK.
791 */
792 if ((pdev->class >> 8) == PCI_CLASS_BRIDGE_HOST)
793 return err;
794
795 /* Otherwise make sure it's in the range for one of the
796 * device's resources.
797 */
798 user_paddr = vma->vm_pgoff << PAGE_SHIFT;
799 user_size = vma->vm_end - vma->vm_start;
800
801 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
802 struct resource *rp = &pdev->resource[i];
803 resource_size_t aligned_end;
804
805 /* Active? */
806 if (!rp->flags)
807 continue;
808
809 /* Same type? */
810 if (i == PCI_ROM_RESOURCE) {
811 if (mmap_state != pci_mmap_mem)
812 continue;
813 } else {
814 if ((mmap_state == pci_mmap_io &&
815 (rp->flags & IORESOURCE_IO) == 0) ||
816 (mmap_state == pci_mmap_mem &&
817 (rp->flags & IORESOURCE_MEM) == 0))
818 continue;
819 }
820
821 /* Align the resource end to the next page address.
822 * PAGE_SIZE intentionally added instead of (PAGE_SIZE - 1),
823 * because actually we need the address of the next byte
824 * after rp->end.
825 */
826 aligned_end = (rp->end + PAGE_SIZE) & PAGE_MASK;
827
828 if ((rp->start <= user_paddr) &&
829 (user_paddr + user_size) <= aligned_end)
830 break;
831 }
832
833 if (i > PCI_ROM_RESOURCE)
834 return -EINVAL;
835
836 return 0;
837}
838
839/* Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
840 * device mapping.
841 */
842static void __pci_mmap_set_pgprot(struct pci_dev *dev, struct vm_area_struct *vma,
843 enum pci_mmap_state mmap_state)
844{
845 /* Our io_remap_pfn_range takes care of this, do nothing. */
846}
847
848/* Perform the actual remap of the pages for a PCI device mapping, as appropriate
849 * for this architecture. The region in the process to map is described by vm_start
850 * and vm_end members of VMA, the base physical address is found in vm_pgoff.
851 * The pci device structure is provided so that architectures may make mapping
852 * decisions on a per-device or per-bus basis.
853 *
854 * Returns a negative error code on failure, zero on success.
855 */
856int pci_mmap_page_range(struct pci_dev *dev, int bar,
857 struct vm_area_struct *vma,
858 enum pci_mmap_state mmap_state, int write_combine)
859{
860 int ret;
861
862 ret = __pci_mmap_make_offset(dev, vma, mmap_state);
863 if (ret < 0)
864 return ret;
865
866 __pci_mmap_set_pgprot(dev, vma, mmap_state);
867
868 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
869 ret = io_remap_pfn_range(vma, vma->vm_start,
870 vma->vm_pgoff,
871 vma->vm_end - vma->vm_start,
872 vma->vm_page_prot);
873 if (ret)
874 return ret;
875
876 return 0;
877}
878
879#ifdef CONFIG_NUMA
880int pcibus_to_node(struct pci_bus *pbus)
881{
882 struct pci_pbm_info *pbm = pbus->sysdata;
883
884 return pbm->numa_node;
885}
886EXPORT_SYMBOL(pcibus_to_node);
887#endif
888
889/* Return the domain number for this pci bus */
890
891int pci_domain_nr(struct pci_bus *pbus)
892{
893 struct pci_pbm_info *pbm = pbus->sysdata;
894 int ret;
895
896 if (!pbm) {
897 ret = -ENXIO;
898 } else {
899 ret = pbm->index;
900 }
901
902 return ret;
903}
904EXPORT_SYMBOL(pci_domain_nr);
905
906#ifdef CONFIG_PCI_MSI
907int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
908{
909 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
910 unsigned int irq;
911
912 if (!pbm->setup_msi_irq)
913 return -EINVAL;
914
915 return pbm->setup_msi_irq(&irq, pdev, desc);
916}
917
918void arch_teardown_msi_irq(unsigned int irq)
919{
920 struct msi_desc *entry = irq_get_msi_desc(irq);
921 struct pci_dev *pdev = msi_desc_to_pci_dev(entry);
922 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
923
924 if (pbm->teardown_msi_irq)
925 pbm->teardown_msi_irq(irq, pdev);
926}
927#endif /* !(CONFIG_PCI_MSI) */
928
929static void ali_sound_dma_hack(struct pci_dev *pdev, int set_bit)
930{
931 struct pci_dev *ali_isa_bridge;
932 u8 val;
933
934 /* ALI sound chips generate 31-bits of DMA, a special register
935 * determines what bit 31 is emitted as.
936 */
937 ali_isa_bridge = pci_get_device(PCI_VENDOR_ID_AL,
938 PCI_DEVICE_ID_AL_M1533,
939 NULL);
940
941 pci_read_config_byte(ali_isa_bridge, 0x7e, &val);
942 if (set_bit)
943 val |= 0x01;
944 else
945 val &= ~0x01;
946 pci_write_config_byte(ali_isa_bridge, 0x7e, val);
947 pci_dev_put(ali_isa_bridge);
948}
949
950int pci64_dma_supported(struct pci_dev *pdev, u64 device_mask)
951{
952 u64 dma_addr_mask;
953
954 if (pdev == NULL) {
955 dma_addr_mask = 0xffffffff;
956 } else {
957 struct iommu *iommu = pdev->dev.archdata.iommu;
958
959 dma_addr_mask = iommu->dma_addr_mask;
960
961 if (pdev->vendor == PCI_VENDOR_ID_AL &&
962 pdev->device == PCI_DEVICE_ID_AL_M5451 &&
963 device_mask == 0x7fffffff) {
964 ali_sound_dma_hack(pdev,
965 (dma_addr_mask & 0x80000000) != 0);
966 return 1;
967 }
968 }
969
970 if (device_mask >= (1UL << 32UL))
971 return 0;
972
973 return (device_mask & dma_addr_mask) == dma_addr_mask;
974}
975
976void pci_resource_to_user(const struct pci_dev *pdev, int bar,
977 const struct resource *rp, resource_size_t *start,
978 resource_size_t *end)
979{
980 struct pci_bus_region region;
981
982 /*
983 * "User" addresses are shown in /sys/devices/pci.../.../resource
984 * and /proc/bus/pci/devices and used as mmap offsets for
985 * /proc/bus/pci/BB/DD.F files (see proc_bus_pci_mmap()).
986 *
987 * On sparc, these are PCI bus addresses, i.e., raw BAR values.
988 */
989 pcibios_resource_to_bus(pdev->bus, ®ion, (struct resource *) rp);
990 *start = region.start;
991 *end = region.end;
992}
993
994void pcibios_set_master(struct pci_dev *dev)
995{
996 /* No special bus mastering setup handling */
997}
998
999#ifdef CONFIG_PCI_IOV
1000int pcibios_add_device(struct pci_dev *dev)
1001{
1002 struct pci_dev *pdev;
1003
1004 /* Add sriov arch specific initialization here.
1005 * Copy dev_archdata from PF to VF
1006 */
1007 if (dev->is_virtfn) {
1008 struct dev_archdata *psd;
1009
1010 pdev = dev->physfn;
1011 psd = &pdev->dev.archdata;
1012 pci_init_dev_archdata(&dev->dev.archdata, psd->iommu,
1013 psd->stc, psd->host_controller, NULL,
1014 psd->numa_node);
1015 }
1016 return 0;
1017}
1018#endif /* CONFIG_PCI_IOV */
1019
1020static int __init pcibios_init(void)
1021{
1022 pci_dfl_cache_line_size = 64 >> 2;
1023 return 0;
1024}
1025subsys_initcall(pcibios_init);
1026
1027#ifdef CONFIG_SYSFS
1028
1029#define SLOT_NAME_SIZE 11 /* Max decimal digits + null in u32 */
1030
1031static void pcie_bus_slot_names(struct pci_bus *pbus)
1032{
1033 struct pci_dev *pdev;
1034 struct pci_bus *bus;
1035
1036 list_for_each_entry(pdev, &pbus->devices, bus_list) {
1037 char name[SLOT_NAME_SIZE];
1038 struct pci_slot *pci_slot;
1039 const u32 *slot_num;
1040 int len;
1041
1042 slot_num = of_get_property(pdev->dev.of_node,
1043 "physical-slot#", &len);
1044
1045 if (slot_num == NULL || len != 4)
1046 continue;
1047
1048 snprintf(name, sizeof(name), "%u", slot_num[0]);
1049 pci_slot = pci_create_slot(pbus, slot_num[0], name, NULL);
1050
1051 if (IS_ERR(pci_slot))
1052 pr_err("PCI: pci_create_slot returned %ld.\n",
1053 PTR_ERR(pci_slot));
1054 }
1055
1056 list_for_each_entry(bus, &pbus->children, node)
1057 pcie_bus_slot_names(bus);
1058}
1059
1060static void pci_bus_slot_names(struct device_node *node, struct pci_bus *bus)
1061{
1062 const struct pci_slot_names {
1063 u32 slot_mask;
1064 char names[0];
1065 } *prop;
1066 const char *sp;
1067 int len, i;
1068 u32 mask;
1069
1070 prop = of_get_property(node, "slot-names", &len);
1071 if (!prop)
1072 return;
1073
1074 mask = prop->slot_mask;
1075 sp = prop->names;
1076
1077 if (ofpci_verbose)
1078 printk("PCI: Making slots for [%s] mask[0x%02x]\n",
1079 node->full_name, mask);
1080
1081 i = 0;
1082 while (mask) {
1083 struct pci_slot *pci_slot;
1084 u32 this_bit = 1 << i;
1085
1086 if (!(mask & this_bit)) {
1087 i++;
1088 continue;
1089 }
1090
1091 if (ofpci_verbose)
1092 printk("PCI: Making slot [%s]\n", sp);
1093
1094 pci_slot = pci_create_slot(bus, i, sp, NULL);
1095 if (IS_ERR(pci_slot))
1096 printk(KERN_ERR "PCI: pci_create_slot returned %ld\n",
1097 PTR_ERR(pci_slot));
1098
1099 sp += strlen(sp) + 1;
1100 mask &= ~this_bit;
1101 i++;
1102 }
1103}
1104
1105static int __init of_pci_slot_init(void)
1106{
1107 struct pci_bus *pbus = NULL;
1108
1109 while ((pbus = pci_find_next_bus(pbus)) != NULL) {
1110 struct device_node *node;
1111 struct pci_dev *pdev;
1112
1113 pdev = list_first_entry(&pbus->devices, struct pci_dev,
1114 bus_list);
1115
1116 if (pdev && pci_is_pcie(pdev)) {
1117 pcie_bus_slot_names(pbus);
1118 } else {
1119
1120 if (pbus->self) {
1121
1122 /* PCI->PCI bridge */
1123 node = pbus->self->dev.of_node;
1124
1125 } else {
1126 struct pci_pbm_info *pbm = pbus->sysdata;
1127
1128 /* Host PCI controller */
1129 node = pbm->op->dev.of_node;
1130 }
1131
1132 pci_bus_slot_names(node, pbus);
1133 }
1134 }
1135
1136 return 0;
1137}
1138device_initcall(of_pci_slot_init);
1139#endif
1/* pci.c: UltraSparc PCI controller support.
2 *
3 * Copyright (C) 1997, 1998, 1999 David S. Miller (davem@redhat.com)
4 * Copyright (C) 1998, 1999 Eddie C. Dost (ecd@skynet.be)
5 * Copyright (C) 1999 Jakub Jelinek (jj@ultra.linux.cz)
6 *
7 * OF tree based PCI bus probing taken from the PowerPC port
8 * with minor modifications, see there for credits.
9 */
10
11#include <linux/export.h>
12#include <linux/kernel.h>
13#include <linux/string.h>
14#include <linux/sched.h>
15#include <linux/capability.h>
16#include <linux/errno.h>
17#include <linux/pci.h>
18#include <linux/msi.h>
19#include <linux/irq.h>
20#include <linux/init.h>
21#include <linux/of.h>
22#include <linux/of_device.h>
23
24#include <asm/uaccess.h>
25#include <asm/pgtable.h>
26#include <asm/irq.h>
27#include <asm/prom.h>
28#include <asm/apb.h>
29
30#include "pci_impl.h"
31
32/* List of all PCI controllers found in the system. */
33struct pci_pbm_info *pci_pbm_root = NULL;
34
35/* Each PBM found gets a unique index. */
36int pci_num_pbms = 0;
37
38volatile int pci_poke_in_progress;
39volatile int pci_poke_cpu = -1;
40volatile int pci_poke_faulted;
41
42static DEFINE_SPINLOCK(pci_poke_lock);
43
44void pci_config_read8(u8 *addr, u8 *ret)
45{
46 unsigned long flags;
47 u8 byte;
48
49 spin_lock_irqsave(&pci_poke_lock, flags);
50 pci_poke_cpu = smp_processor_id();
51 pci_poke_in_progress = 1;
52 pci_poke_faulted = 0;
53 __asm__ __volatile__("membar #Sync\n\t"
54 "lduba [%1] %2, %0\n\t"
55 "membar #Sync"
56 : "=r" (byte)
57 : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
58 : "memory");
59 pci_poke_in_progress = 0;
60 pci_poke_cpu = -1;
61 if (!pci_poke_faulted)
62 *ret = byte;
63 spin_unlock_irqrestore(&pci_poke_lock, flags);
64}
65
66void pci_config_read16(u16 *addr, u16 *ret)
67{
68 unsigned long flags;
69 u16 word;
70
71 spin_lock_irqsave(&pci_poke_lock, flags);
72 pci_poke_cpu = smp_processor_id();
73 pci_poke_in_progress = 1;
74 pci_poke_faulted = 0;
75 __asm__ __volatile__("membar #Sync\n\t"
76 "lduha [%1] %2, %0\n\t"
77 "membar #Sync"
78 : "=r" (word)
79 : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
80 : "memory");
81 pci_poke_in_progress = 0;
82 pci_poke_cpu = -1;
83 if (!pci_poke_faulted)
84 *ret = word;
85 spin_unlock_irqrestore(&pci_poke_lock, flags);
86}
87
88void pci_config_read32(u32 *addr, u32 *ret)
89{
90 unsigned long flags;
91 u32 dword;
92
93 spin_lock_irqsave(&pci_poke_lock, flags);
94 pci_poke_cpu = smp_processor_id();
95 pci_poke_in_progress = 1;
96 pci_poke_faulted = 0;
97 __asm__ __volatile__("membar #Sync\n\t"
98 "lduwa [%1] %2, %0\n\t"
99 "membar #Sync"
100 : "=r" (dword)
101 : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
102 : "memory");
103 pci_poke_in_progress = 0;
104 pci_poke_cpu = -1;
105 if (!pci_poke_faulted)
106 *ret = dword;
107 spin_unlock_irqrestore(&pci_poke_lock, flags);
108}
109
110void pci_config_write8(u8 *addr, u8 val)
111{
112 unsigned long flags;
113
114 spin_lock_irqsave(&pci_poke_lock, flags);
115 pci_poke_cpu = smp_processor_id();
116 pci_poke_in_progress = 1;
117 pci_poke_faulted = 0;
118 __asm__ __volatile__("membar #Sync\n\t"
119 "stba %0, [%1] %2\n\t"
120 "membar #Sync"
121 : /* no outputs */
122 : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
123 : "memory");
124 pci_poke_in_progress = 0;
125 pci_poke_cpu = -1;
126 spin_unlock_irqrestore(&pci_poke_lock, flags);
127}
128
129void pci_config_write16(u16 *addr, u16 val)
130{
131 unsigned long flags;
132
133 spin_lock_irqsave(&pci_poke_lock, flags);
134 pci_poke_cpu = smp_processor_id();
135 pci_poke_in_progress = 1;
136 pci_poke_faulted = 0;
137 __asm__ __volatile__("membar #Sync\n\t"
138 "stha %0, [%1] %2\n\t"
139 "membar #Sync"
140 : /* no outputs */
141 : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
142 : "memory");
143 pci_poke_in_progress = 0;
144 pci_poke_cpu = -1;
145 spin_unlock_irqrestore(&pci_poke_lock, flags);
146}
147
148void pci_config_write32(u32 *addr, u32 val)
149{
150 unsigned long flags;
151
152 spin_lock_irqsave(&pci_poke_lock, flags);
153 pci_poke_cpu = smp_processor_id();
154 pci_poke_in_progress = 1;
155 pci_poke_faulted = 0;
156 __asm__ __volatile__("membar #Sync\n\t"
157 "stwa %0, [%1] %2\n\t"
158 "membar #Sync"
159 : /* no outputs */
160 : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
161 : "memory");
162 pci_poke_in_progress = 0;
163 pci_poke_cpu = -1;
164 spin_unlock_irqrestore(&pci_poke_lock, flags);
165}
166
167static int ofpci_verbose;
168
169static int __init ofpci_debug(char *str)
170{
171 int val = 0;
172
173 get_option(&str, &val);
174 if (val)
175 ofpci_verbose = 1;
176 return 1;
177}
178
179__setup("ofpci_debug=", ofpci_debug);
180
181static unsigned long pci_parse_of_flags(u32 addr0)
182{
183 unsigned long flags = 0;
184
185 if (addr0 & 0x02000000) {
186 flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY;
187 flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64;
188 flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M;
189 if (addr0 & 0x40000000)
190 flags |= IORESOURCE_PREFETCH
191 | PCI_BASE_ADDRESS_MEM_PREFETCH;
192 } else if (addr0 & 0x01000000)
193 flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO;
194 return flags;
195}
196
197/* The of_device layer has translated all of the assigned-address properties
198 * into physical address resources, we only have to figure out the register
199 * mapping.
200 */
201static void pci_parse_of_addrs(struct platform_device *op,
202 struct device_node *node,
203 struct pci_dev *dev)
204{
205 struct resource *op_res;
206 const u32 *addrs;
207 int proplen;
208
209 addrs = of_get_property(node, "assigned-addresses", &proplen);
210 if (!addrs)
211 return;
212 if (ofpci_verbose)
213 printk(" parse addresses (%d bytes) @ %p\n",
214 proplen, addrs);
215 op_res = &op->resource[0];
216 for (; proplen >= 20; proplen -= 20, addrs += 5, op_res++) {
217 struct resource *res;
218 unsigned long flags;
219 int i;
220
221 flags = pci_parse_of_flags(addrs[0]);
222 if (!flags)
223 continue;
224 i = addrs[0] & 0xff;
225 if (ofpci_verbose)
226 printk(" start: %llx, end: %llx, i: %x\n",
227 op_res->start, op_res->end, i);
228
229 if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) {
230 res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2];
231 } else if (i == dev->rom_base_reg) {
232 res = &dev->resource[PCI_ROM_RESOURCE];
233 flags |= IORESOURCE_READONLY | IORESOURCE_CACHEABLE
234 | IORESOURCE_SIZEALIGN;
235 } else {
236 printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i);
237 continue;
238 }
239 res->start = op_res->start;
240 res->end = op_res->end;
241 res->flags = flags;
242 res->name = pci_name(dev);
243 }
244}
245
246static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
247 struct device_node *node,
248 struct pci_bus *bus, int devfn)
249{
250 struct dev_archdata *sd;
251 struct pci_slot *slot;
252 struct platform_device *op;
253 struct pci_dev *dev;
254 const char *type;
255 u32 class;
256
257 dev = pci_alloc_dev(bus);
258 if (!dev)
259 return NULL;
260
261 sd = &dev->dev.archdata;
262 sd->iommu = pbm->iommu;
263 sd->stc = &pbm->stc;
264 sd->host_controller = pbm;
265 sd->op = op = of_find_device_by_node(node);
266 sd->numa_node = pbm->numa_node;
267
268 sd = &op->dev.archdata;
269 sd->iommu = pbm->iommu;
270 sd->stc = &pbm->stc;
271 sd->numa_node = pbm->numa_node;
272
273 if (!strcmp(node->name, "ebus"))
274 of_propagate_archdata(op);
275
276 type = of_get_property(node, "device_type", NULL);
277 if (type == NULL)
278 type = "";
279
280 if (ofpci_verbose)
281 printk(" create device, devfn: %x, type: %s\n",
282 devfn, type);
283
284 dev->sysdata = node;
285 dev->dev.parent = bus->bridge;
286 dev->dev.bus = &pci_bus_type;
287 dev->dev.of_node = of_node_get(node);
288 dev->devfn = devfn;
289 dev->multifunction = 0; /* maybe a lie? */
290 set_pcie_port_type(dev);
291
292 list_for_each_entry(slot, &dev->bus->slots, list)
293 if (PCI_SLOT(dev->devfn) == slot->number)
294 dev->slot = slot;
295
296 dev->vendor = of_getintprop_default(node, "vendor-id", 0xffff);
297 dev->device = of_getintprop_default(node, "device-id", 0xffff);
298 dev->subsystem_vendor =
299 of_getintprop_default(node, "subsystem-vendor-id", 0);
300 dev->subsystem_device =
301 of_getintprop_default(node, "subsystem-id", 0);
302
303 dev->cfg_size = pci_cfg_space_size(dev);
304
305 /* We can't actually use the firmware value, we have
306 * to read what is in the register right now. One
307 * reason is that in the case of IDE interfaces the
308 * firmware can sample the value before the the IDE
309 * interface is programmed into native mode.
310 */
311 pci_read_config_dword(dev, PCI_CLASS_REVISION, &class);
312 dev->class = class >> 8;
313 dev->revision = class & 0xff;
314
315 dev_set_name(&dev->dev, "%04x:%02x:%02x.%d", pci_domain_nr(bus),
316 dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));
317
318 if (ofpci_verbose)
319 printk(" class: 0x%x device name: %s\n",
320 dev->class, pci_name(dev));
321
322 /* I have seen IDE devices which will not respond to
323 * the bmdma simplex check reads if bus mastering is
324 * disabled.
325 */
326 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
327 pci_set_master(dev);
328
329 dev->current_state = PCI_UNKNOWN; /* unknown power state */
330 dev->error_state = pci_channel_io_normal;
331 dev->dma_mask = 0xffffffff;
332
333 if (!strcmp(node->name, "pci")) {
334 /* a PCI-PCI bridge */
335 dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
336 dev->rom_base_reg = PCI_ROM_ADDRESS1;
337 } else if (!strcmp(type, "cardbus")) {
338 dev->hdr_type = PCI_HEADER_TYPE_CARDBUS;
339 } else {
340 dev->hdr_type = PCI_HEADER_TYPE_NORMAL;
341 dev->rom_base_reg = PCI_ROM_ADDRESS;
342
343 dev->irq = sd->op->archdata.irqs[0];
344 if (dev->irq == 0xffffffff)
345 dev->irq = PCI_IRQ_NONE;
346 }
347
348 pci_parse_of_addrs(sd->op, node, dev);
349
350 if (ofpci_verbose)
351 printk(" adding to system ...\n");
352
353 pci_device_add(dev, bus);
354
355 return dev;
356}
357
358static void apb_calc_first_last(u8 map, u32 *first_p, u32 *last_p)
359{
360 u32 idx, first, last;
361
362 first = 8;
363 last = 0;
364 for (idx = 0; idx < 8; idx++) {
365 if ((map & (1 << idx)) != 0) {
366 if (first > idx)
367 first = idx;
368 if (last < idx)
369 last = idx;
370 }
371 }
372
373 *first_p = first;
374 *last_p = last;
375}
376
377/* Cook up fake bus resources for SUNW,simba PCI bridges which lack
378 * a proper 'ranges' property.
379 */
380static void apb_fake_ranges(struct pci_dev *dev,
381 struct pci_bus *bus,
382 struct pci_pbm_info *pbm)
383{
384 struct pci_bus_region region;
385 struct resource *res;
386 u32 first, last;
387 u8 map;
388
389 pci_read_config_byte(dev, APB_IO_ADDRESS_MAP, &map);
390 apb_calc_first_last(map, &first, &last);
391 res = bus->resource[0];
392 res->flags = IORESOURCE_IO;
393 region.start = (first << 21);
394 region.end = (last << 21) + ((1 << 21) - 1);
395 pcibios_bus_to_resource(dev->bus, res, ®ion);
396
397 pci_read_config_byte(dev, APB_MEM_ADDRESS_MAP, &map);
398 apb_calc_first_last(map, &first, &last);
399 res = bus->resource[1];
400 res->flags = IORESOURCE_MEM;
401 region.start = (first << 29);
402 region.end = (last << 29) + ((1 << 29) - 1);
403 pcibios_bus_to_resource(dev->bus, res, ®ion);
404}
405
406static void pci_of_scan_bus(struct pci_pbm_info *pbm,
407 struct device_node *node,
408 struct pci_bus *bus);
409
410#define GET_64BIT(prop, i) ((((u64) (prop)[(i)]) << 32) | (prop)[(i)+1])
411
412static void of_scan_pci_bridge(struct pci_pbm_info *pbm,
413 struct device_node *node,
414 struct pci_dev *dev)
415{
416 struct pci_bus *bus;
417 const u32 *busrange, *ranges;
418 int len, i, simba;
419 struct pci_bus_region region;
420 struct resource *res;
421 unsigned int flags;
422 u64 size;
423
424 if (ofpci_verbose)
425 printk("of_scan_pci_bridge(%s)\n", node->full_name);
426
427 /* parse bus-range property */
428 busrange = of_get_property(node, "bus-range", &len);
429 if (busrange == NULL || len != 8) {
430 printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n",
431 node->full_name);
432 return;
433 }
434 ranges = of_get_property(node, "ranges", &len);
435 simba = 0;
436 if (ranges == NULL) {
437 const char *model = of_get_property(node, "model", NULL);
438 if (model && !strcmp(model, "SUNW,simba"))
439 simba = 1;
440 }
441
442 bus = pci_add_new_bus(dev->bus, dev, busrange[0]);
443 if (!bus) {
444 printk(KERN_ERR "Failed to create pci bus for %s\n",
445 node->full_name);
446 return;
447 }
448
449 bus->primary = dev->bus->number;
450 pci_bus_insert_busn_res(bus, busrange[0], busrange[1]);
451 bus->bridge_ctl = 0;
452
453 /* parse ranges property, or cook one up by hand for Simba */
454 /* PCI #address-cells == 3 and #size-cells == 2 always */
455 res = &dev->resource[PCI_BRIDGE_RESOURCES];
456 for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) {
457 res->flags = 0;
458 bus->resource[i] = res;
459 ++res;
460 }
461 if (simba) {
462 apb_fake_ranges(dev, bus, pbm);
463 goto after_ranges;
464 } else if (ranges == NULL) {
465 pci_read_bridge_bases(bus);
466 goto after_ranges;
467 }
468 i = 1;
469 for (; len >= 32; len -= 32, ranges += 8) {
470 flags = pci_parse_of_flags(ranges[0]);
471 size = GET_64BIT(ranges, 6);
472 if (flags == 0 || size == 0)
473 continue;
474 if (flags & IORESOURCE_IO) {
475 res = bus->resource[0];
476 if (res->flags) {
477 printk(KERN_ERR "PCI: ignoring extra I/O range"
478 " for bridge %s\n", node->full_name);
479 continue;
480 }
481 } else {
482 if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) {
483 printk(KERN_ERR "PCI: too many memory ranges"
484 " for bridge %s\n", node->full_name);
485 continue;
486 }
487 res = bus->resource[i];
488 ++i;
489 }
490
491 res->flags = flags;
492 region.start = GET_64BIT(ranges, 1);
493 region.end = region.start + size - 1;
494 pcibios_bus_to_resource(dev->bus, res, ®ion);
495 }
496after_ranges:
497 sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus),
498 bus->number);
499 if (ofpci_verbose)
500 printk(" bus name: %s\n", bus->name);
501
502 pci_of_scan_bus(pbm, node, bus);
503}
504
505static void pci_of_scan_bus(struct pci_pbm_info *pbm,
506 struct device_node *node,
507 struct pci_bus *bus)
508{
509 struct device_node *child;
510 const u32 *reg;
511 int reglen, devfn, prev_devfn;
512 struct pci_dev *dev;
513
514 if (ofpci_verbose)
515 printk("PCI: scan_bus[%s] bus no %d\n",
516 node->full_name, bus->number);
517
518 child = NULL;
519 prev_devfn = -1;
520 while ((child = of_get_next_child(node, child)) != NULL) {
521 if (ofpci_verbose)
522 printk(" * %s\n", child->full_name);
523 reg = of_get_property(child, "reg", ®len);
524 if (reg == NULL || reglen < 20)
525 continue;
526
527 devfn = (reg[0] >> 8) & 0xff;
528
529 /* This is a workaround for some device trees
530 * which list PCI devices twice. On the V100
531 * for example, device number 3 is listed twice.
532 * Once as "pm" and once again as "lomp".
533 */
534 if (devfn == prev_devfn)
535 continue;
536 prev_devfn = devfn;
537
538 /* create a new pci_dev for this device */
539 dev = of_create_pci_dev(pbm, child, bus, devfn);
540 if (!dev)
541 continue;
542 if (ofpci_verbose)
543 printk("PCI: dev header type: %x\n",
544 dev->hdr_type);
545
546 if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
547 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
548 of_scan_pci_bridge(pbm, child, dev);
549 }
550}
551
552static ssize_t
553show_pciobppath_attr(struct device * dev, struct device_attribute * attr, char * buf)
554{
555 struct pci_dev *pdev;
556 struct device_node *dp;
557
558 pdev = to_pci_dev(dev);
559 dp = pdev->dev.of_node;
560
561 return snprintf (buf, PAGE_SIZE, "%s\n", dp->full_name);
562}
563
564static DEVICE_ATTR(obppath, S_IRUSR | S_IRGRP | S_IROTH, show_pciobppath_attr, NULL);
565
566static void pci_bus_register_of_sysfs(struct pci_bus *bus)
567{
568 struct pci_dev *dev;
569 struct pci_bus *child_bus;
570 int err;
571
572 list_for_each_entry(dev, &bus->devices, bus_list) {
573 /* we don't really care if we can create this file or
574 * not, but we need to assign the result of the call
575 * or the world will fall under alien invasion and
576 * everybody will be frozen on a spaceship ready to be
577 * eaten on alpha centauri by some green and jelly
578 * humanoid.
579 */
580 err = sysfs_create_file(&dev->dev.kobj, &dev_attr_obppath.attr);
581 (void) err;
582 }
583 list_for_each_entry(child_bus, &bus->children, node)
584 pci_bus_register_of_sysfs(child_bus);
585}
586
587struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
588 struct device *parent)
589{
590 LIST_HEAD(resources);
591 struct device_node *node = pbm->op->dev.of_node;
592 struct pci_bus *bus;
593
594 printk("PCI: Scanning PBM %s\n", node->full_name);
595
596 pci_add_resource_offset(&resources, &pbm->io_space,
597 pbm->io_space.start);
598 pci_add_resource_offset(&resources, &pbm->mem_space,
599 pbm->mem_space.start);
600 pbm->busn.start = pbm->pci_first_busno;
601 pbm->busn.end = pbm->pci_last_busno;
602 pbm->busn.flags = IORESOURCE_BUS;
603 pci_add_resource(&resources, &pbm->busn);
604 bus = pci_create_root_bus(parent, pbm->pci_first_busno, pbm->pci_ops,
605 pbm, &resources);
606 if (!bus) {
607 printk(KERN_ERR "Failed to create bus for %s\n",
608 node->full_name);
609 pci_free_resource_list(&resources);
610 return NULL;
611 }
612
613 pci_of_scan_bus(pbm, node, bus);
614 pci_bus_add_devices(bus);
615 pci_bus_register_of_sysfs(bus);
616
617 return bus;
618}
619
620void pcibios_fixup_bus(struct pci_bus *pbus)
621{
622}
623
624resource_size_t pcibios_align_resource(void *data, const struct resource *res,
625 resource_size_t size, resource_size_t align)
626{
627 return res->start;
628}
629
630int pcibios_enable_device(struct pci_dev *dev, int mask)
631{
632 u16 cmd, oldcmd;
633 int i;
634
635 pci_read_config_word(dev, PCI_COMMAND, &cmd);
636 oldcmd = cmd;
637
638 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
639 struct resource *res = &dev->resource[i];
640
641 /* Only set up the requested stuff */
642 if (!(mask & (1<<i)))
643 continue;
644
645 if (res->flags & IORESOURCE_IO)
646 cmd |= PCI_COMMAND_IO;
647 if (res->flags & IORESOURCE_MEM)
648 cmd |= PCI_COMMAND_MEMORY;
649 }
650
651 if (cmd != oldcmd) {
652 printk(KERN_DEBUG "PCI: Enabling device: (%s), cmd %x\n",
653 pci_name(dev), cmd);
654 /* Enable the appropriate bits in the PCI command register. */
655 pci_write_config_word(dev, PCI_COMMAND, cmd);
656 }
657 return 0;
658}
659
660/* Platform support for /proc/bus/pci/X/Y mmap()s. */
661
662/* If the user uses a host-bridge as the PCI device, he may use
663 * this to perform a raw mmap() of the I/O or MEM space behind
664 * that controller.
665 *
666 * This can be useful for execution of x86 PCI bios initialization code
667 * on a PCI card, like the xfree86 int10 stuff does.
668 */
669static int __pci_mmap_make_offset_bus(struct pci_dev *pdev, struct vm_area_struct *vma,
670 enum pci_mmap_state mmap_state)
671{
672 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
673 unsigned long space_size, user_offset, user_size;
674
675 if (mmap_state == pci_mmap_io) {
676 space_size = resource_size(&pbm->io_space);
677 } else {
678 space_size = resource_size(&pbm->mem_space);
679 }
680
681 /* Make sure the request is in range. */
682 user_offset = vma->vm_pgoff << PAGE_SHIFT;
683 user_size = vma->vm_end - vma->vm_start;
684
685 if (user_offset >= space_size ||
686 (user_offset + user_size) > space_size)
687 return -EINVAL;
688
689 if (mmap_state == pci_mmap_io) {
690 vma->vm_pgoff = (pbm->io_space.start +
691 user_offset) >> PAGE_SHIFT;
692 } else {
693 vma->vm_pgoff = (pbm->mem_space.start +
694 user_offset) >> PAGE_SHIFT;
695 }
696
697 return 0;
698}
699
700/* Adjust vm_pgoff of VMA such that it is the physical page offset
701 * corresponding to the 32-bit pci bus offset for DEV requested by the user.
702 *
703 * Basically, the user finds the base address for his device which he wishes
704 * to mmap. They read the 32-bit value from the config space base register,
705 * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
706 * offset parameter of mmap on /proc/bus/pci/XXX for that device.
707 *
708 * Returns negative error code on failure, zero on success.
709 */
710static int __pci_mmap_make_offset(struct pci_dev *pdev,
711 struct vm_area_struct *vma,
712 enum pci_mmap_state mmap_state)
713{
714 unsigned long user_paddr, user_size;
715 int i, err;
716
717 /* First compute the physical address in vma->vm_pgoff,
718 * making sure the user offset is within range in the
719 * appropriate PCI space.
720 */
721 err = __pci_mmap_make_offset_bus(pdev, vma, mmap_state);
722 if (err)
723 return err;
724
725 /* If this is a mapping on a host bridge, any address
726 * is OK.
727 */
728 if ((pdev->class >> 8) == PCI_CLASS_BRIDGE_HOST)
729 return err;
730
731 /* Otherwise make sure it's in the range for one of the
732 * device's resources.
733 */
734 user_paddr = vma->vm_pgoff << PAGE_SHIFT;
735 user_size = vma->vm_end - vma->vm_start;
736
737 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
738 struct resource *rp = &pdev->resource[i];
739 resource_size_t aligned_end;
740
741 /* Active? */
742 if (!rp->flags)
743 continue;
744
745 /* Same type? */
746 if (i == PCI_ROM_RESOURCE) {
747 if (mmap_state != pci_mmap_mem)
748 continue;
749 } else {
750 if ((mmap_state == pci_mmap_io &&
751 (rp->flags & IORESOURCE_IO) == 0) ||
752 (mmap_state == pci_mmap_mem &&
753 (rp->flags & IORESOURCE_MEM) == 0))
754 continue;
755 }
756
757 /* Align the resource end to the next page address.
758 * PAGE_SIZE intentionally added instead of (PAGE_SIZE - 1),
759 * because actually we need the address of the next byte
760 * after rp->end.
761 */
762 aligned_end = (rp->end + PAGE_SIZE) & PAGE_MASK;
763
764 if ((rp->start <= user_paddr) &&
765 (user_paddr + user_size) <= aligned_end)
766 break;
767 }
768
769 if (i > PCI_ROM_RESOURCE)
770 return -EINVAL;
771
772 return 0;
773}
774
775/* Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
776 * device mapping.
777 */
778static void __pci_mmap_set_pgprot(struct pci_dev *dev, struct vm_area_struct *vma,
779 enum pci_mmap_state mmap_state)
780{
781 /* Our io_remap_pfn_range takes care of this, do nothing. */
782}
783
784/* Perform the actual remap of the pages for a PCI device mapping, as appropriate
785 * for this architecture. The region in the process to map is described by vm_start
786 * and vm_end members of VMA, the base physical address is found in vm_pgoff.
787 * The pci device structure is provided so that architectures may make mapping
788 * decisions on a per-device or per-bus basis.
789 *
790 * Returns a negative error code on failure, zero on success.
791 */
792int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
793 enum pci_mmap_state mmap_state,
794 int write_combine)
795{
796 int ret;
797
798 ret = __pci_mmap_make_offset(dev, vma, mmap_state);
799 if (ret < 0)
800 return ret;
801
802 __pci_mmap_set_pgprot(dev, vma, mmap_state);
803
804 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
805 ret = io_remap_pfn_range(vma, vma->vm_start,
806 vma->vm_pgoff,
807 vma->vm_end - vma->vm_start,
808 vma->vm_page_prot);
809 if (ret)
810 return ret;
811
812 return 0;
813}
814
815#ifdef CONFIG_NUMA
816int pcibus_to_node(struct pci_bus *pbus)
817{
818 struct pci_pbm_info *pbm = pbus->sysdata;
819
820 return pbm->numa_node;
821}
822EXPORT_SYMBOL(pcibus_to_node);
823#endif
824
825/* Return the domain number for this pci bus */
826
827int pci_domain_nr(struct pci_bus *pbus)
828{
829 struct pci_pbm_info *pbm = pbus->sysdata;
830 int ret;
831
832 if (!pbm) {
833 ret = -ENXIO;
834 } else {
835 ret = pbm->index;
836 }
837
838 return ret;
839}
840EXPORT_SYMBOL(pci_domain_nr);
841
842#ifdef CONFIG_PCI_MSI
843int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
844{
845 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
846 unsigned int irq;
847
848 if (!pbm->setup_msi_irq)
849 return -EINVAL;
850
851 return pbm->setup_msi_irq(&irq, pdev, desc);
852}
853
854void arch_teardown_msi_irq(unsigned int irq)
855{
856 struct msi_desc *entry = irq_get_msi_desc(irq);
857 struct pci_dev *pdev = entry->dev;
858 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
859
860 if (pbm->teardown_msi_irq)
861 pbm->teardown_msi_irq(irq, pdev);
862}
863#endif /* !(CONFIG_PCI_MSI) */
864
865static void ali_sound_dma_hack(struct pci_dev *pdev, int set_bit)
866{
867 struct pci_dev *ali_isa_bridge;
868 u8 val;
869
870 /* ALI sound chips generate 31-bits of DMA, a special register
871 * determines what bit 31 is emitted as.
872 */
873 ali_isa_bridge = pci_get_device(PCI_VENDOR_ID_AL,
874 PCI_DEVICE_ID_AL_M1533,
875 NULL);
876
877 pci_read_config_byte(ali_isa_bridge, 0x7e, &val);
878 if (set_bit)
879 val |= 0x01;
880 else
881 val &= ~0x01;
882 pci_write_config_byte(ali_isa_bridge, 0x7e, val);
883 pci_dev_put(ali_isa_bridge);
884}
885
886int pci64_dma_supported(struct pci_dev *pdev, u64 device_mask)
887{
888 u64 dma_addr_mask;
889
890 if (pdev == NULL) {
891 dma_addr_mask = 0xffffffff;
892 } else {
893 struct iommu *iommu = pdev->dev.archdata.iommu;
894
895 dma_addr_mask = iommu->dma_addr_mask;
896
897 if (pdev->vendor == PCI_VENDOR_ID_AL &&
898 pdev->device == PCI_DEVICE_ID_AL_M5451 &&
899 device_mask == 0x7fffffff) {
900 ali_sound_dma_hack(pdev,
901 (dma_addr_mask & 0x80000000) != 0);
902 return 1;
903 }
904 }
905
906 if (device_mask >= (1UL << 32UL))
907 return 0;
908
909 return (device_mask & dma_addr_mask) == dma_addr_mask;
910}
911
912void pci_resource_to_user(const struct pci_dev *pdev, int bar,
913 const struct resource *rp, resource_size_t *start,
914 resource_size_t *end)
915{
916 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
917 unsigned long offset;
918
919 if (rp->flags & IORESOURCE_IO)
920 offset = pbm->io_space.start;
921 else
922 offset = pbm->mem_space.start;
923
924 *start = rp->start - offset;
925 *end = rp->end - offset;
926}
927
928void pcibios_set_master(struct pci_dev *dev)
929{
930 /* No special bus mastering setup handling */
931}
932
933static int __init pcibios_init(void)
934{
935 pci_dfl_cache_line_size = 64 >> 2;
936 return 0;
937}
938subsys_initcall(pcibios_init);
939
940#ifdef CONFIG_SYSFS
941static void pci_bus_slot_names(struct device_node *node, struct pci_bus *bus)
942{
943 const struct pci_slot_names {
944 u32 slot_mask;
945 char names[0];
946 } *prop;
947 const char *sp;
948 int len, i;
949 u32 mask;
950
951 prop = of_get_property(node, "slot-names", &len);
952 if (!prop)
953 return;
954
955 mask = prop->slot_mask;
956 sp = prop->names;
957
958 if (ofpci_verbose)
959 printk("PCI: Making slots for [%s] mask[0x%02x]\n",
960 node->full_name, mask);
961
962 i = 0;
963 while (mask) {
964 struct pci_slot *pci_slot;
965 u32 this_bit = 1 << i;
966
967 if (!(mask & this_bit)) {
968 i++;
969 continue;
970 }
971
972 if (ofpci_verbose)
973 printk("PCI: Making slot [%s]\n", sp);
974
975 pci_slot = pci_create_slot(bus, i, sp, NULL);
976 if (IS_ERR(pci_slot))
977 printk(KERN_ERR "PCI: pci_create_slot returned %ld\n",
978 PTR_ERR(pci_slot));
979
980 sp += strlen(sp) + 1;
981 mask &= ~this_bit;
982 i++;
983 }
984}
985
986static int __init of_pci_slot_init(void)
987{
988 struct pci_bus *pbus = NULL;
989
990 while ((pbus = pci_find_next_bus(pbus)) != NULL) {
991 struct device_node *node;
992
993 if (pbus->self) {
994 /* PCI->PCI bridge */
995 node = pbus->self->dev.of_node;
996 } else {
997 struct pci_pbm_info *pbm = pbus->sysdata;
998
999 /* Host PCI controller */
1000 node = pbm->op->dev.of_node;
1001 }
1002
1003 pci_bus_slot_names(node, pbus);
1004 }
1005
1006 return 0;
1007}
1008device_initcall(of_pci_slot_init);
1009#endif