1 /* pci.c: UltraSparc PCI controller support.
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)
7 * OF tree based PCI bus probing taken from the PowerPC port
8 * with minor modifications, see there for credits.
11 #include <linux/module.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>
22 #include <asm/uaccess.h>
23 #include <asm/pgtable.h>
33 /* A "nop" PCI implementation. */
34 asmlinkage int sys_pciconfig_read(unsigned long bus, unsigned long dfn,
35 unsigned long off, unsigned long len,
40 asmlinkage int sys_pciconfig_write(unsigned long bus, unsigned long dfn,
41 unsigned long off, unsigned long len,
48 /* List of all PCI controllers found in the system. */
49 struct pci_pbm_info *pci_pbm_root = NULL;
51 /* Each PBM found gets a unique index. */
54 volatile int pci_poke_in_progress;
55 volatile int pci_poke_cpu = -1;
56 volatile int pci_poke_faulted;
58 static DEFINE_SPINLOCK(pci_poke_lock);
60 void pci_config_read8(u8 *addr, u8 *ret)
65 spin_lock_irqsave(&pci_poke_lock, flags);
66 pci_poke_cpu = smp_processor_id();
67 pci_poke_in_progress = 1;
69 __asm__ __volatile__("membar #Sync\n\t"
70 "lduba [%1] %2, %0\n\t"
73 : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
75 pci_poke_in_progress = 0;
77 if (!pci_poke_faulted)
79 spin_unlock_irqrestore(&pci_poke_lock, flags);
82 void pci_config_read16(u16 *addr, u16 *ret)
87 spin_lock_irqsave(&pci_poke_lock, flags);
88 pci_poke_cpu = smp_processor_id();
89 pci_poke_in_progress = 1;
91 __asm__ __volatile__("membar #Sync\n\t"
92 "lduha [%1] %2, %0\n\t"
95 : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
97 pci_poke_in_progress = 0;
99 if (!pci_poke_faulted)
101 spin_unlock_irqrestore(&pci_poke_lock, flags);
104 void pci_config_read32(u32 *addr, u32 *ret)
109 spin_lock_irqsave(&pci_poke_lock, flags);
110 pci_poke_cpu = smp_processor_id();
111 pci_poke_in_progress = 1;
112 pci_poke_faulted = 0;
113 __asm__ __volatile__("membar #Sync\n\t"
114 "lduwa [%1] %2, %0\n\t"
117 : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
119 pci_poke_in_progress = 0;
121 if (!pci_poke_faulted)
123 spin_unlock_irqrestore(&pci_poke_lock, flags);
126 void pci_config_write8(u8 *addr, u8 val)
130 spin_lock_irqsave(&pci_poke_lock, flags);
131 pci_poke_cpu = smp_processor_id();
132 pci_poke_in_progress = 1;
133 pci_poke_faulted = 0;
134 __asm__ __volatile__("membar #Sync\n\t"
135 "stba %0, [%1] %2\n\t"
138 : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
140 pci_poke_in_progress = 0;
142 spin_unlock_irqrestore(&pci_poke_lock, flags);
145 void pci_config_write16(u16 *addr, u16 val)
149 spin_lock_irqsave(&pci_poke_lock, flags);
150 pci_poke_cpu = smp_processor_id();
151 pci_poke_in_progress = 1;
152 pci_poke_faulted = 0;
153 __asm__ __volatile__("membar #Sync\n\t"
154 "stha %0, [%1] %2\n\t"
157 : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
159 pci_poke_in_progress = 0;
161 spin_unlock_irqrestore(&pci_poke_lock, flags);
164 void pci_config_write32(u32 *addr, u32 val)
168 spin_lock_irqsave(&pci_poke_lock, flags);
169 pci_poke_cpu = smp_processor_id();
170 pci_poke_in_progress = 1;
171 pci_poke_faulted = 0;
172 __asm__ __volatile__("membar #Sync\n\t"
173 "stwa %0, [%1] %2\n\t"
176 : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
178 pci_poke_in_progress = 0;
180 spin_unlock_irqrestore(&pci_poke_lock, flags);
183 /* Probe for all PCI controllers in the system. */
184 extern void sabre_init(struct device_node *, const char *);
185 extern void psycho_init(struct device_node *, const char *);
186 extern void schizo_init(struct device_node *, const char *);
187 extern void schizo_plus_init(struct device_node *, const char *);
188 extern void tomatillo_init(struct device_node *, const char *);
189 extern void sun4v_pci_init(struct device_node *, const char *);
190 extern void fire_pci_init(struct device_node *, const char *);
194 void (*init)(struct device_node *, const char *);
195 } pci_controller_table[] __initdata = {
196 { "SUNW,sabre", sabre_init },
197 { "pci108e,a000", sabre_init },
198 { "pci108e,a001", sabre_init },
199 { "SUNW,psycho", psycho_init },
200 { "pci108e,8000", psycho_init },
201 { "SUNW,schizo", schizo_init },
202 { "pci108e,8001", schizo_init },
203 { "SUNW,schizo+", schizo_plus_init },
204 { "pci108e,8002", schizo_plus_init },
205 { "SUNW,tomatillo", tomatillo_init },
206 { "pci108e,a801", tomatillo_init },
207 { "SUNW,sun4v-pci", sun4v_pci_init },
208 { "pciex108e,80f0", fire_pci_init },
210 #define PCI_NUM_CONTROLLER_TYPES ARRAY_SIZE(pci_controller_table)
212 static int __init pci_controller_init(const char *model_name, int namelen, struct device_node *dp)
216 for (i = 0; i < PCI_NUM_CONTROLLER_TYPES; i++) {
217 if (!strncmp(model_name,
218 pci_controller_table[i].model_name,
220 pci_controller_table[i].init(dp, model_name);
228 static int __init pci_controller_scan(int (*handler)(const char *, int, struct device_node *))
230 struct device_node *dp;
233 for_each_node_by_name(dp, "pci") {
234 struct property *prop;
237 prop = of_find_property(dp, "model", &len);
239 prop = of_find_property(dp, "compatible", &len);
242 const char *model = prop->value;
245 /* Our value may be a multi-valued string in the
246 * case of some compatible properties. For sanity,
247 * only try the first one.
249 while (model[item_len] && len) {
254 if (handler(model, item_len, dp))
262 /* Find each controller in the system, attach and initialize
263 * software state structure for each and link into the
264 * pci_pbm_root. Setup the controller enough such
265 * that bus scanning can be done.
267 static void __init pci_controller_probe(void)
269 printk("PCI: Probing for controllers.\n");
271 pci_controller_scan(pci_controller_init);
274 static int ofpci_verbose;
276 static int __init ofpci_debug(char *str)
280 get_option(&str, &val);
286 __setup("ofpci_debug=", ofpci_debug);
288 static unsigned long pci_parse_of_flags(u32 addr0)
290 unsigned long flags = 0;
292 if (addr0 & 0x02000000) {
293 flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY;
294 flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64;
295 flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M;
296 if (addr0 & 0x40000000)
297 flags |= IORESOURCE_PREFETCH
298 | PCI_BASE_ADDRESS_MEM_PREFETCH;
299 } else if (addr0 & 0x01000000)
300 flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO;
304 /* The of_device layer has translated all of the assigned-address properties
305 * into physical address resources, we only have to figure out the register
308 static void pci_parse_of_addrs(struct of_device *op,
309 struct device_node *node,
312 struct resource *op_res;
316 addrs = of_get_property(node, "assigned-addresses", &proplen);
320 printk(" parse addresses (%d bytes) @ %p\n",
322 op_res = &op->resource[0];
323 for (; proplen >= 20; proplen -= 20, addrs += 5, op_res++) {
324 struct resource *res;
328 flags = pci_parse_of_flags(addrs[0]);
333 printk(" start: %lx, end: %lx, i: %x\n",
334 op_res->start, op_res->end, i);
336 if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) {
337 res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2];
338 } else if (i == dev->rom_base_reg) {
339 res = &dev->resource[PCI_ROM_RESOURCE];
340 flags |= IORESOURCE_READONLY | IORESOURCE_CACHEABLE;
342 printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i);
345 res->start = op_res->start;
346 res->end = op_res->end;
348 res->name = pci_name(dev);
352 struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
353 struct device_node *node,
354 struct pci_bus *bus, int devfn,
357 struct dev_archdata *sd;
362 dev = alloc_pci_dev();
366 sd = &dev->dev.archdata;
367 sd->iommu = pbm->iommu;
369 sd->host_controller = pbm;
370 sd->prom_node = node;
371 sd->op = of_find_device_by_node(node);
373 sd = &sd->op->dev.archdata;
374 sd->iommu = pbm->iommu;
377 type = of_get_property(node, "device_type", NULL);
382 printk(" create device, devfn: %x, type: %s\n",
387 dev->dev.parent = bus->bridge;
388 dev->dev.bus = &pci_bus_type;
390 dev->multifunction = 0; /* maybe a lie? */
392 if (host_controller) {
393 if (tlb_type != hypervisor) {
394 pci_read_config_word(dev, PCI_VENDOR_ID,
396 pci_read_config_word(dev, PCI_DEVICE_ID,
399 dev->vendor = PCI_VENDOR_ID_SUN;
400 dev->device = 0x80f0;
403 dev->class = PCI_CLASS_BRIDGE_HOST << 8;
404 sprintf(pci_name(dev), "%04x:%02x:%02x.%d", pci_domain_nr(bus),
405 0x00, PCI_SLOT(devfn), PCI_FUNC(devfn));
407 dev->vendor = of_getintprop_default(node, "vendor-id", 0xffff);
408 dev->device = of_getintprop_default(node, "device-id", 0xffff);
409 dev->subsystem_vendor =
410 of_getintprop_default(node, "subsystem-vendor-id", 0);
411 dev->subsystem_device =
412 of_getintprop_default(node, "subsystem-id", 0);
414 dev->cfg_size = pci_cfg_space_size(dev);
416 /* We can't actually use the firmware value, we have
417 * to read what is in the register right now. One
418 * reason is that in the case of IDE interfaces the
419 * firmware can sample the value before the the IDE
420 * interface is programmed into native mode.
422 pci_read_config_dword(dev, PCI_CLASS_REVISION, &class);
423 dev->class = class >> 8;
424 dev->revision = class & 0xff;
426 sprintf(pci_name(dev), "%04x:%02x:%02x.%d", pci_domain_nr(bus),
427 dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));
430 printk(" class: 0x%x device name: %s\n",
431 dev->class, pci_name(dev));
433 /* I have seen IDE devices which will not respond to
434 * the bmdma simplex check reads if bus mastering is
437 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
440 dev->current_state = 4; /* unknown power state */
441 dev->error_state = pci_channel_io_normal;
443 if (host_controller) {
444 dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
445 dev->rom_base_reg = PCI_ROM_ADDRESS1;
446 dev->irq = PCI_IRQ_NONE;
448 if (!strcmp(type, "pci") || !strcmp(type, "pciex")) {
449 /* a PCI-PCI bridge */
450 dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
451 dev->rom_base_reg = PCI_ROM_ADDRESS1;
452 } else if (!strcmp(type, "cardbus")) {
453 dev->hdr_type = PCI_HEADER_TYPE_CARDBUS;
455 dev->hdr_type = PCI_HEADER_TYPE_NORMAL;
456 dev->rom_base_reg = PCI_ROM_ADDRESS;
458 dev->irq = sd->op->irqs[0];
459 if (dev->irq == 0xffffffff)
460 dev->irq = PCI_IRQ_NONE;
463 pci_parse_of_addrs(sd->op, node, dev);
466 printk(" adding to system ...\n");
468 pci_device_add(dev, bus);
473 static void __devinit apb_calc_first_last(u8 map, u32 *first_p, u32 *last_p)
475 u32 idx, first, last;
479 for (idx = 0; idx < 8; idx++) {
480 if ((map & (1 << idx)) != 0) {
492 static void pci_resource_adjust(struct resource *res,
493 struct resource *root)
495 res->start += root->start;
496 res->end += root->start;
499 /* For PCI bus devices which lack a 'ranges' property we interrogate
500 * the config space values to set the resources, just like the generic
501 * Linux PCI probing code does.
503 static void __devinit pci_cfg_fake_ranges(struct pci_dev *dev,
505 struct pci_pbm_info *pbm)
507 struct resource *res;
508 u8 io_base_lo, io_limit_lo;
509 u16 mem_base_lo, mem_limit_lo;
510 unsigned long base, limit;
512 pci_read_config_byte(dev, PCI_IO_BASE, &io_base_lo);
513 pci_read_config_byte(dev, PCI_IO_LIMIT, &io_limit_lo);
514 base = (io_base_lo & PCI_IO_RANGE_MASK) << 8;
515 limit = (io_limit_lo & PCI_IO_RANGE_MASK) << 8;
517 if ((io_base_lo & PCI_IO_RANGE_TYPE_MASK) == PCI_IO_RANGE_TYPE_32) {
518 u16 io_base_hi, io_limit_hi;
520 pci_read_config_word(dev, PCI_IO_BASE_UPPER16, &io_base_hi);
521 pci_read_config_word(dev, PCI_IO_LIMIT_UPPER16, &io_limit_hi);
522 base |= (io_base_hi << 16);
523 limit |= (io_limit_hi << 16);
526 res = bus->resource[0];
528 res->flags = (io_base_lo & PCI_IO_RANGE_TYPE_MASK) | IORESOURCE_IO;
532 res->end = limit + 0xfff;
533 pci_resource_adjust(res, &pbm->io_space);
536 pci_read_config_word(dev, PCI_MEMORY_BASE, &mem_base_lo);
537 pci_read_config_word(dev, PCI_MEMORY_LIMIT, &mem_limit_lo);
538 base = (mem_base_lo & PCI_MEMORY_RANGE_MASK) << 16;
539 limit = (mem_limit_lo & PCI_MEMORY_RANGE_MASK) << 16;
541 res = bus->resource[1];
543 res->flags = ((mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) |
546 res->end = limit + 0xfffff;
547 pci_resource_adjust(res, &pbm->mem_space);
550 pci_read_config_word(dev, PCI_PREF_MEMORY_BASE, &mem_base_lo);
551 pci_read_config_word(dev, PCI_PREF_MEMORY_LIMIT, &mem_limit_lo);
552 base = (mem_base_lo & PCI_PREF_RANGE_MASK) << 16;
553 limit = (mem_limit_lo & PCI_PREF_RANGE_MASK) << 16;
555 if ((mem_base_lo & PCI_PREF_RANGE_TYPE_MASK) == PCI_PREF_RANGE_TYPE_64) {
556 u32 mem_base_hi, mem_limit_hi;
558 pci_read_config_dword(dev, PCI_PREF_BASE_UPPER32, &mem_base_hi);
559 pci_read_config_dword(dev, PCI_PREF_LIMIT_UPPER32, &mem_limit_hi);
562 * Some bridges set the base > limit by default, and some
563 * (broken) BIOSes do not initialize them. If we find
564 * this, just assume they are not being used.
566 if (mem_base_hi <= mem_limit_hi) {
567 base |= ((long) mem_base_hi) << 32;
568 limit |= ((long) mem_limit_hi) << 32;
572 res = bus->resource[2];
574 res->flags = ((mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) |
575 IORESOURCE_MEM | IORESOURCE_PREFETCH);
577 res->end = limit + 0xfffff;
578 pci_resource_adjust(res, &pbm->mem_space);
582 /* Cook up fake bus resources for SUNW,simba PCI bridges which lack
583 * a proper 'ranges' property.
585 static void __devinit apb_fake_ranges(struct pci_dev *dev,
587 struct pci_pbm_info *pbm)
589 struct resource *res;
593 pci_read_config_byte(dev, APB_IO_ADDRESS_MAP, &map);
594 apb_calc_first_last(map, &first, &last);
595 res = bus->resource[0];
596 res->start = (first << 21);
597 res->end = (last << 21) + ((1 << 21) - 1);
598 res->flags = IORESOURCE_IO;
599 pci_resource_adjust(res, &pbm->io_space);
601 pci_read_config_byte(dev, APB_MEM_ADDRESS_MAP, &map);
602 apb_calc_first_last(map, &first, &last);
603 res = bus->resource[1];
604 res->start = (first << 21);
605 res->end = (last << 21) + ((1 << 21) - 1);
606 res->flags = IORESOURCE_MEM;
607 pci_resource_adjust(res, &pbm->mem_space);
610 static void __devinit pci_of_scan_bus(struct pci_pbm_info *pbm,
611 struct device_node *node,
612 struct pci_bus *bus);
614 #define GET_64BIT(prop, i) ((((u64) (prop)[(i)]) << 32) | (prop)[(i)+1])
616 static void __devinit of_scan_pci_bridge(struct pci_pbm_info *pbm,
617 struct device_node *node,
621 const u32 *busrange, *ranges;
623 struct resource *res;
628 printk("of_scan_pci_bridge(%s)\n", node->full_name);
630 /* parse bus-range property */
631 busrange = of_get_property(node, "bus-range", &len);
632 if (busrange == NULL || len != 8) {
633 printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n",
637 ranges = of_get_property(node, "ranges", &len);
639 if (ranges == NULL) {
640 const char *model = of_get_property(node, "model", NULL);
641 if (model && !strcmp(model, "SUNW,simba"))
645 bus = pci_add_new_bus(dev->bus, dev, busrange[0]);
647 printk(KERN_ERR "Failed to create pci bus for %s\n",
652 bus->primary = dev->bus->number;
653 bus->subordinate = busrange[1];
656 /* parse ranges property, or cook one up by hand for Simba */
657 /* PCI #address-cells == 3 and #size-cells == 2 always */
658 res = &dev->resource[PCI_BRIDGE_RESOURCES];
659 for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) {
661 bus->resource[i] = res;
665 apb_fake_ranges(dev, bus, pbm);
667 } else if (ranges == NULL) {
668 pci_cfg_fake_ranges(dev, bus, pbm);
672 for (; len >= 32; len -= 32, ranges += 8) {
673 struct resource *root;
675 flags = pci_parse_of_flags(ranges[0]);
676 size = GET_64BIT(ranges, 6);
677 if (flags == 0 || size == 0)
679 if (flags & IORESOURCE_IO) {
680 res = bus->resource[0];
682 printk(KERN_ERR "PCI: ignoring extra I/O range"
683 " for bridge %s\n", node->full_name);
686 root = &pbm->io_space;
688 if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) {
689 printk(KERN_ERR "PCI: too many memory ranges"
690 " for bridge %s\n", node->full_name);
693 res = bus->resource[i];
695 root = &pbm->mem_space;
698 res->start = GET_64BIT(ranges, 1);
699 res->end = res->start + size - 1;
702 /* Another way to implement this would be to add an of_device
703 * layer routine that can calculate a resource for a given
704 * range property value in a PCI device.
706 pci_resource_adjust(res, root);
709 sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus),
712 printk(" bus name: %s\n", bus->name);
714 pci_of_scan_bus(pbm, node, bus);
717 static void __devinit pci_of_scan_bus(struct pci_pbm_info *pbm,
718 struct device_node *node,
721 struct device_node *child;
723 int reglen, devfn, prev_devfn;
727 printk("PCI: scan_bus[%s] bus no %d\n",
728 node->full_name, bus->number);
732 while ((child = of_get_next_child(node, child)) != NULL) {
734 printk(" * %s\n", child->full_name);
735 reg = of_get_property(child, "reg", ®len);
736 if (reg == NULL || reglen < 20)
739 devfn = (reg[0] >> 8) & 0xff;
741 /* This is a workaround for some device trees
742 * which list PCI devices twice. On the V100
743 * for example, device number 3 is listed twice.
744 * Once as "pm" and once again as "lomp".
746 if (devfn == prev_devfn)
750 /* create a new pci_dev for this device */
751 dev = of_create_pci_dev(pbm, child, bus, devfn, 0);
755 printk("PCI: dev header type: %x\n",
758 if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
759 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
760 of_scan_pci_bridge(pbm, child, dev);
765 show_pciobppath_attr(struct device * dev, struct device_attribute * attr, char * buf)
767 struct pci_dev *pdev;
768 struct device_node *dp;
770 pdev = to_pci_dev(dev);
771 dp = pdev->dev.archdata.prom_node;
773 return snprintf (buf, PAGE_SIZE, "%s\n", dp->full_name);
776 static DEVICE_ATTR(obppath, S_IRUSR | S_IRGRP | S_IROTH, show_pciobppath_attr, NULL);
778 static void __devinit pci_bus_register_of_sysfs(struct pci_bus *bus)
781 struct pci_bus *child_bus;
784 list_for_each_entry(dev, &bus->devices, bus_list) {
785 /* we don't really care if we can create this file or
786 * not, but we need to assign the result of the call
787 * or the world will fall under alien invasion and
788 * everybody will be frozen on a spaceship ready to be
789 * eaten on alpha centauri by some green and jelly
792 err = sysfs_create_file(&dev->dev.kobj, &dev_attr_obppath.attr);
794 list_for_each_entry(child_bus, &bus->children, node)
795 pci_bus_register_of_sysfs(child_bus);
798 int pci_host_bridge_read_pci_cfg(struct pci_bus *bus_dev,
803 static u8 fake_pci_config[] = {
804 0x8e, 0x10, /* Vendor: 0x108e (Sun) */
805 0xf0, 0x80, /* Device: 0x80f0 (Fire) */
806 0x46, 0x01, /* Command: 0x0146 (SERR, PARITY, MASTER, MEM) */
807 0xa0, 0x22, /* Status: 0x02a0 (DEVSEL_MED, FB2B, 66MHZ) */
808 0x00, 0x00, 0x00, 0x06, /* Class: 0x06000000 host bridge */
809 0x00, /* Cacheline: 0x00 */
810 0x40, /* Latency: 0x40 */
811 0x00, /* Header-Type: 0x00 normal */
815 if (where >= 0 && where < sizeof(fake_pci_config) &&
816 (where + size) >= 0 &&
817 (where + size) < sizeof(fake_pci_config) &&
818 size <= sizeof(u32)) {
821 *value |= fake_pci_config[where + size];
825 return PCIBIOS_SUCCESSFUL;
828 int pci_host_bridge_write_pci_cfg(struct pci_bus *bus_dev,
833 return PCIBIOS_SUCCESSFUL;
836 struct pci_bus * __devinit pci_scan_one_pbm(struct pci_pbm_info *pbm)
838 struct device_node *node = pbm->prom_node;
839 struct pci_dev *host_pdev;
842 printk("PCI: Scanning PBM %s\n", node->full_name);
844 /* XXX parent device? XXX */
845 bus = pci_create_bus(NULL, pbm->pci_first_busno, pbm->pci_ops, pbm);
847 printk(KERN_ERR "Failed to create bus for %s\n",
851 bus->secondary = pbm->pci_first_busno;
852 bus->subordinate = pbm->pci_last_busno;
854 bus->resource[0] = &pbm->io_space;
855 bus->resource[1] = &pbm->mem_space;
857 /* Create the dummy host bridge and link it in. */
858 host_pdev = of_create_pci_dev(pbm, node, bus, 0x00, 1);
859 bus->self = host_pdev;
861 pci_of_scan_bus(pbm, node, bus);
862 pci_bus_add_devices(bus);
863 pci_bus_register_of_sysfs(bus);
868 static void __init pci_scan_each_controller_bus(void)
870 struct pci_pbm_info *pbm;
872 for (pbm = pci_pbm_root; pbm; pbm = pbm->next)
876 extern void power_init(void);
878 static int __init pcibios_init(void)
880 pci_controller_probe();
881 if (pci_pbm_root == NULL)
884 pci_scan_each_controller_bus();
893 subsys_initcall(pcibios_init);
895 void __devinit pcibios_fixup_bus(struct pci_bus *pbus)
897 struct pci_pbm_info *pbm = pbus->sysdata;
899 /* Generic PCI bus probing sets these to point at
900 * &io{port,mem}_resouce which is wrong for us.
902 pbus->resource[0] = &pbm->io_space;
903 pbus->resource[1] = &pbm->mem_space;
906 struct resource *pcibios_select_root(struct pci_dev *pdev, struct resource *r)
908 struct pci_pbm_info *pbm = pdev->bus->sysdata;
909 struct resource *root = NULL;
911 if (r->flags & IORESOURCE_IO)
912 root = &pbm->io_space;
913 if (r->flags & IORESOURCE_MEM)
914 root = &pbm->mem_space;
919 void pcibios_update_irq(struct pci_dev *pdev, int irq)
923 void pcibios_align_resource(void *data, struct resource *res,
924 resource_size_t size, resource_size_t align)
928 int pcibios_enable_device(struct pci_dev *dev, int mask)
933 pci_read_config_word(dev, PCI_COMMAND, &cmd);
936 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
937 struct resource *res = &dev->resource[i];
939 /* Only set up the requested stuff */
940 if (!(mask & (1<<i)))
943 if (res->flags & IORESOURCE_IO)
944 cmd |= PCI_COMMAND_IO;
945 if (res->flags & IORESOURCE_MEM)
946 cmd |= PCI_COMMAND_MEMORY;
950 printk(KERN_DEBUG "PCI: Enabling device: (%s), cmd %x\n",
952 /* Enable the appropriate bits in the PCI command register. */
953 pci_write_config_word(dev, PCI_COMMAND, cmd);
958 void pcibios_resource_to_bus(struct pci_dev *pdev, struct pci_bus_region *region,
959 struct resource *res)
961 struct pci_pbm_info *pbm = pdev->bus->sysdata;
962 struct resource zero_res, *root;
966 zero_res.flags = res->flags;
968 if (res->flags & IORESOURCE_IO)
969 root = &pbm->io_space;
971 root = &pbm->mem_space;
973 pci_resource_adjust(&zero_res, root);
975 region->start = res->start - zero_res.start;
976 region->end = res->end - zero_res.start;
978 EXPORT_SYMBOL(pcibios_resource_to_bus);
980 void pcibios_bus_to_resource(struct pci_dev *pdev, struct resource *res,
981 struct pci_bus_region *region)
983 struct pci_pbm_info *pbm = pdev->bus->sysdata;
984 struct resource *root;
986 res->start = region->start;
987 res->end = region->end;
989 if (res->flags & IORESOURCE_IO)
990 root = &pbm->io_space;
992 root = &pbm->mem_space;
994 pci_resource_adjust(res, root);
996 EXPORT_SYMBOL(pcibios_bus_to_resource);
998 char * __devinit pcibios_setup(char *str)
1003 /* Platform support for /proc/bus/pci/X/Y mmap()s. */
1005 /* If the user uses a host-bridge as the PCI device, he may use
1006 * this to perform a raw mmap() of the I/O or MEM space behind
1009 * This can be useful for execution of x86 PCI bios initialization code
1010 * on a PCI card, like the xfree86 int10 stuff does.
1012 static int __pci_mmap_make_offset_bus(struct pci_dev *pdev, struct vm_area_struct *vma,
1013 enum pci_mmap_state mmap_state)
1015 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
1016 unsigned long space_size, user_offset, user_size;
1018 if (mmap_state == pci_mmap_io) {
1019 space_size = (pbm->io_space.end -
1020 pbm->io_space.start) + 1;
1022 space_size = (pbm->mem_space.end -
1023 pbm->mem_space.start) + 1;
1026 /* Make sure the request is in range. */
1027 user_offset = vma->vm_pgoff << PAGE_SHIFT;
1028 user_size = vma->vm_end - vma->vm_start;
1030 if (user_offset >= space_size ||
1031 (user_offset + user_size) > space_size)
1034 if (mmap_state == pci_mmap_io) {
1035 vma->vm_pgoff = (pbm->io_space.start +
1036 user_offset) >> PAGE_SHIFT;
1038 vma->vm_pgoff = (pbm->mem_space.start +
1039 user_offset) >> PAGE_SHIFT;
1045 /* Adjust vm_pgoff of VMA such that it is the physical page offset
1046 * corresponding to the 32-bit pci bus offset for DEV requested by the user.
1048 * Basically, the user finds the base address for his device which he wishes
1049 * to mmap. They read the 32-bit value from the config space base register,
1050 * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
1051 * offset parameter of mmap on /proc/bus/pci/XXX for that device.
1053 * Returns negative error code on failure, zero on success.
1055 static int __pci_mmap_make_offset(struct pci_dev *pdev,
1056 struct vm_area_struct *vma,
1057 enum pci_mmap_state mmap_state)
1059 unsigned long user_paddr, user_size;
1062 /* First compute the physical address in vma->vm_pgoff,
1063 * making sure the user offset is within range in the
1064 * appropriate PCI space.
1066 err = __pci_mmap_make_offset_bus(pdev, vma, mmap_state);
1070 /* If this is a mapping on a host bridge, any address
1073 if ((pdev->class >> 8) == PCI_CLASS_BRIDGE_HOST)
1076 /* Otherwise make sure it's in the range for one of the
1077 * device's resources.
1079 user_paddr = vma->vm_pgoff << PAGE_SHIFT;
1080 user_size = vma->vm_end - vma->vm_start;
1082 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
1083 struct resource *rp = &pdev->resource[i];
1090 if (i == PCI_ROM_RESOURCE) {
1091 if (mmap_state != pci_mmap_mem)
1094 if ((mmap_state == pci_mmap_io &&
1095 (rp->flags & IORESOURCE_IO) == 0) ||
1096 (mmap_state == pci_mmap_mem &&
1097 (rp->flags & IORESOURCE_MEM) == 0))
1101 if ((rp->start <= user_paddr) &&
1102 (user_paddr + user_size) <= (rp->end + 1UL))
1106 if (i > PCI_ROM_RESOURCE)
1112 /* Set vm_flags of VMA, as appropriate for this architecture, for a pci device
1115 static void __pci_mmap_set_flags(struct pci_dev *dev, struct vm_area_struct *vma,
1116 enum pci_mmap_state mmap_state)
1118 vma->vm_flags |= (VM_IO | VM_RESERVED);
1121 /* Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
1124 static void __pci_mmap_set_pgprot(struct pci_dev *dev, struct vm_area_struct *vma,
1125 enum pci_mmap_state mmap_state)
1127 /* Our io_remap_pfn_range takes care of this, do nothing. */
1130 /* Perform the actual remap of the pages for a PCI device mapping, as appropriate
1131 * for this architecture. The region in the process to map is described by vm_start
1132 * and vm_end members of VMA, the base physical address is found in vm_pgoff.
1133 * The pci device structure is provided so that architectures may make mapping
1134 * decisions on a per-device or per-bus basis.
1136 * Returns a negative error code on failure, zero on success.
1138 int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
1139 enum pci_mmap_state mmap_state,
1144 ret = __pci_mmap_make_offset(dev, vma, mmap_state);
1148 __pci_mmap_set_flags(dev, vma, mmap_state);
1149 __pci_mmap_set_pgprot(dev, vma, mmap_state);
1151 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1152 ret = io_remap_pfn_range(vma, vma->vm_start,
1154 vma->vm_end - vma->vm_start,
1162 /* Return the domain nuber for this pci bus */
1164 int pci_domain_nr(struct pci_bus *pbus)
1166 struct pci_pbm_info *pbm = pbus->sysdata;
1169 if (pbm == NULL || pbm->parent == NULL) {
1177 EXPORT_SYMBOL(pci_domain_nr);
1179 #ifdef CONFIG_PCI_MSI
1180 int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
1182 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
1185 if (!pbm->setup_msi_irq)
1188 return pbm->setup_msi_irq(&virt_irq, pdev, desc);
1191 void arch_teardown_msi_irq(unsigned int virt_irq)
1193 struct msi_desc *entry = get_irq_msi(virt_irq);
1194 struct pci_dev *pdev = entry->dev;
1195 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
1197 if (!pbm->teardown_msi_irq)
1200 return pbm->teardown_msi_irq(virt_irq, pdev);
1202 #endif /* !(CONFIG_PCI_MSI) */
1204 struct device_node *pci_device_to_OF_node(struct pci_dev *pdev)
1206 return pdev->dev.archdata.prom_node;
1208 EXPORT_SYMBOL(pci_device_to_OF_node);
1210 static void ali_sound_dma_hack(struct pci_dev *pdev, int set_bit)
1212 struct pci_dev *ali_isa_bridge;
1215 /* ALI sound chips generate 31-bits of DMA, a special register
1216 * determines what bit 31 is emitted as.
1218 ali_isa_bridge = pci_get_device(PCI_VENDOR_ID_AL,
1219 PCI_DEVICE_ID_AL_M1533,
1222 pci_read_config_byte(ali_isa_bridge, 0x7e, &val);
1227 pci_write_config_byte(ali_isa_bridge, 0x7e, val);
1228 pci_dev_put(ali_isa_bridge);
1231 int pci_dma_supported(struct pci_dev *pdev, u64 device_mask)
1236 dma_addr_mask = 0xffffffff;
1238 struct iommu *iommu = pdev->dev.archdata.iommu;
1240 dma_addr_mask = iommu->dma_addr_mask;
1242 if (pdev->vendor == PCI_VENDOR_ID_AL &&
1243 pdev->device == PCI_DEVICE_ID_AL_M5451 &&
1244 device_mask == 0x7fffffff) {
1245 ali_sound_dma_hack(pdev,
1246 (dma_addr_mask & 0x80000000) != 0);
1251 if (device_mask >= (1UL << 32UL))
1254 return (device_mask & dma_addr_mask) == dma_addr_mask;
1257 void pci_resource_to_user(const struct pci_dev *pdev, int bar,
1258 const struct resource *rp, resource_size_t *start,
1259 resource_size_t *end)
1261 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
1262 unsigned long offset;
1264 if (rp->flags & IORESOURCE_IO)
1265 offset = pbm->io_space.start;
1267 offset = pbm->mem_space.start;
1269 *start = rp->start - offset;
1270 *end = rp->end - offset;
1273 #endif /* !(CONFIG_PCI) */