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_is_controller(const char *model_name, int namelen, struct device_node *dp)
232 for (i = 0; i < PCI_NUM_CONTROLLER_TYPES; i++) {
233 if (!strncmp(model_name,
234 pci_controller_table[i].model_name,
242 static int __init pci_controller_scan(int (*handler)(const char *, int, struct device_node *))
244 struct device_node *dp;
247 for_each_node_by_name(dp, "pci") {
248 struct property *prop;
251 prop = of_find_property(dp, "model", &len);
253 prop = of_find_property(dp, "compatible", &len);
256 const char *model = prop->value;
259 /* Our value may be a multi-valued string in the
260 * case of some compatible properties. For sanity,
261 * only try the first one.
263 while (model[item_len] && len) {
268 if (handler(model, item_len, dp))
277 /* Is there some PCI controller in the system? */
278 int __init pcic_present(void)
280 return pci_controller_scan(pci_is_controller);
283 /* Find each controller in the system, attach and initialize
284 * software state structure for each and link into the
285 * pci_pbm_root. Setup the controller enough such
286 * that bus scanning can be done.
288 static void __init pci_controller_probe(void)
290 printk("PCI: Probing for controllers.\n");
292 pci_controller_scan(pci_controller_init);
295 static int ofpci_verbose;
297 static int __init ofpci_debug(char *str)
301 get_option(&str, &val);
307 __setup("ofpci_debug=", ofpci_debug);
309 static unsigned long pci_parse_of_flags(u32 addr0)
311 unsigned long flags = 0;
313 if (addr0 & 0x02000000) {
314 flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY;
315 flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64;
316 flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M;
317 if (addr0 & 0x40000000)
318 flags |= IORESOURCE_PREFETCH
319 | PCI_BASE_ADDRESS_MEM_PREFETCH;
320 } else if (addr0 & 0x01000000)
321 flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO;
325 /* The of_device layer has translated all of the assigned-address properties
326 * into physical address resources, we only have to figure out the register
329 static void pci_parse_of_addrs(struct of_device *op,
330 struct device_node *node,
333 struct resource *op_res;
337 addrs = of_get_property(node, "assigned-addresses", &proplen);
341 printk(" parse addresses (%d bytes) @ %p\n",
343 op_res = &op->resource[0];
344 for (; proplen >= 20; proplen -= 20, addrs += 5, op_res++) {
345 struct resource *res;
349 flags = pci_parse_of_flags(addrs[0]);
354 printk(" start: %lx, end: %lx, i: %x\n",
355 op_res->start, op_res->end, i);
357 if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) {
358 res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2];
359 } else if (i == dev->rom_base_reg) {
360 res = &dev->resource[PCI_ROM_RESOURCE];
361 flags |= IORESOURCE_READONLY | IORESOURCE_CACHEABLE;
363 printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i);
366 res->start = op_res->start;
367 res->end = op_res->end;
369 res->name = pci_name(dev);
373 struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
374 struct device_node *node,
375 struct pci_bus *bus, int devfn,
378 struct dev_archdata *sd;
383 dev = alloc_pci_dev();
387 sd = &dev->dev.archdata;
388 sd->iommu = pbm->iommu;
390 sd->host_controller = pbm;
391 sd->prom_node = node;
392 sd->op = of_find_device_by_node(node);
394 sd = &sd->op->dev.archdata;
395 sd->iommu = pbm->iommu;
398 type = of_get_property(node, "device_type", NULL);
403 printk(" create device, devfn: %x, type: %s\n",
408 dev->dev.parent = bus->bridge;
409 dev->dev.bus = &pci_bus_type;
411 dev->multifunction = 0; /* maybe a lie? */
413 if (host_controller) {
414 if (tlb_type != hypervisor) {
415 pci_read_config_word(dev, PCI_VENDOR_ID,
417 pci_read_config_word(dev, PCI_DEVICE_ID,
420 dev->vendor = PCI_VENDOR_ID_SUN;
421 dev->device = 0x80f0;
424 dev->class = PCI_CLASS_BRIDGE_HOST << 8;
425 sprintf(pci_name(dev), "%04x:%02x:%02x.%d", pci_domain_nr(bus),
426 0x00, PCI_SLOT(devfn), PCI_FUNC(devfn));
428 dev->vendor = of_getintprop_default(node, "vendor-id", 0xffff);
429 dev->device = of_getintprop_default(node, "device-id", 0xffff);
430 dev->subsystem_vendor =
431 of_getintprop_default(node, "subsystem-vendor-id", 0);
432 dev->subsystem_device =
433 of_getintprop_default(node, "subsystem-id", 0);
435 dev->cfg_size = pci_cfg_space_size(dev);
437 /* We can't actually use the firmware value, we have
438 * to read what is in the register right now. One
439 * reason is that in the case of IDE interfaces the
440 * firmware can sample the value before the the IDE
441 * interface is programmed into native mode.
443 pci_read_config_dword(dev, PCI_CLASS_REVISION, &class);
444 dev->class = class >> 8;
445 dev->revision = class & 0xff;
447 sprintf(pci_name(dev), "%04x:%02x:%02x.%d", pci_domain_nr(bus),
448 dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));
451 printk(" class: 0x%x device name: %s\n",
452 dev->class, pci_name(dev));
454 /* I have seen IDE devices which will not respond to
455 * the bmdma simplex check reads if bus mastering is
458 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
461 dev->current_state = 4; /* unknown power state */
462 dev->error_state = pci_channel_io_normal;
464 if (host_controller) {
465 dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
466 dev->rom_base_reg = PCI_ROM_ADDRESS1;
467 dev->irq = PCI_IRQ_NONE;
469 if (!strcmp(type, "pci") || !strcmp(type, "pciex")) {
470 /* a PCI-PCI bridge */
471 dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
472 dev->rom_base_reg = PCI_ROM_ADDRESS1;
473 } else if (!strcmp(type, "cardbus")) {
474 dev->hdr_type = PCI_HEADER_TYPE_CARDBUS;
476 dev->hdr_type = PCI_HEADER_TYPE_NORMAL;
477 dev->rom_base_reg = PCI_ROM_ADDRESS;
479 dev->irq = sd->op->irqs[0];
480 if (dev->irq == 0xffffffff)
481 dev->irq = PCI_IRQ_NONE;
484 pci_parse_of_addrs(sd->op, node, dev);
487 printk(" adding to system ...\n");
489 pci_device_add(dev, bus);
494 static void __devinit apb_calc_first_last(u8 map, u32 *first_p, u32 *last_p)
496 u32 idx, first, last;
500 for (idx = 0; idx < 8; idx++) {
501 if ((map & (1 << idx)) != 0) {
513 static void pci_resource_adjust(struct resource *res,
514 struct resource *root)
516 res->start += root->start;
517 res->end += root->start;
520 /* For PCI bus devices which lack a 'ranges' property we interrogate
521 * the config space values to set the resources, just like the generic
522 * Linux PCI probing code does.
524 static void __devinit pci_cfg_fake_ranges(struct pci_dev *dev,
526 struct pci_pbm_info *pbm)
528 struct resource *res;
529 u8 io_base_lo, io_limit_lo;
530 u16 mem_base_lo, mem_limit_lo;
531 unsigned long base, limit;
533 pci_read_config_byte(dev, PCI_IO_BASE, &io_base_lo);
534 pci_read_config_byte(dev, PCI_IO_LIMIT, &io_limit_lo);
535 base = (io_base_lo & PCI_IO_RANGE_MASK) << 8;
536 limit = (io_limit_lo & PCI_IO_RANGE_MASK) << 8;
538 if ((io_base_lo & PCI_IO_RANGE_TYPE_MASK) == PCI_IO_RANGE_TYPE_32) {
539 u16 io_base_hi, io_limit_hi;
541 pci_read_config_word(dev, PCI_IO_BASE_UPPER16, &io_base_hi);
542 pci_read_config_word(dev, PCI_IO_LIMIT_UPPER16, &io_limit_hi);
543 base |= (io_base_hi << 16);
544 limit |= (io_limit_hi << 16);
547 res = bus->resource[0];
549 res->flags = (io_base_lo & PCI_IO_RANGE_TYPE_MASK) | IORESOURCE_IO;
553 res->end = limit + 0xfff;
554 pci_resource_adjust(res, &pbm->io_space);
557 pci_read_config_word(dev, PCI_MEMORY_BASE, &mem_base_lo);
558 pci_read_config_word(dev, PCI_MEMORY_LIMIT, &mem_limit_lo);
559 base = (mem_base_lo & PCI_MEMORY_RANGE_MASK) << 16;
560 limit = (mem_limit_lo & PCI_MEMORY_RANGE_MASK) << 16;
562 res = bus->resource[1];
564 res->flags = ((mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) |
567 res->end = limit + 0xfffff;
568 pci_resource_adjust(res, &pbm->mem_space);
571 pci_read_config_word(dev, PCI_PREF_MEMORY_BASE, &mem_base_lo);
572 pci_read_config_word(dev, PCI_PREF_MEMORY_LIMIT, &mem_limit_lo);
573 base = (mem_base_lo & PCI_PREF_RANGE_MASK) << 16;
574 limit = (mem_limit_lo & PCI_PREF_RANGE_MASK) << 16;
576 if ((mem_base_lo & PCI_PREF_RANGE_TYPE_MASK) == PCI_PREF_RANGE_TYPE_64) {
577 u32 mem_base_hi, mem_limit_hi;
579 pci_read_config_dword(dev, PCI_PREF_BASE_UPPER32, &mem_base_hi);
580 pci_read_config_dword(dev, PCI_PREF_LIMIT_UPPER32, &mem_limit_hi);
583 * Some bridges set the base > limit by default, and some
584 * (broken) BIOSes do not initialize them. If we find
585 * this, just assume they are not being used.
587 if (mem_base_hi <= mem_limit_hi) {
588 base |= ((long) mem_base_hi) << 32;
589 limit |= ((long) mem_limit_hi) << 32;
593 res = bus->resource[2];
595 res->flags = ((mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) |
596 IORESOURCE_MEM | IORESOURCE_PREFETCH);
598 res->end = limit + 0xfffff;
599 pci_resource_adjust(res, &pbm->mem_space);
603 /* Cook up fake bus resources for SUNW,simba PCI bridges which lack
604 * a proper 'ranges' property.
606 static void __devinit apb_fake_ranges(struct pci_dev *dev,
608 struct pci_pbm_info *pbm)
610 struct resource *res;
614 pci_read_config_byte(dev, APB_IO_ADDRESS_MAP, &map);
615 apb_calc_first_last(map, &first, &last);
616 res = bus->resource[0];
617 res->start = (first << 21);
618 res->end = (last << 21) + ((1 << 21) - 1);
619 res->flags = IORESOURCE_IO;
620 pci_resource_adjust(res, &pbm->io_space);
622 pci_read_config_byte(dev, APB_MEM_ADDRESS_MAP, &map);
623 apb_calc_first_last(map, &first, &last);
624 res = bus->resource[1];
625 res->start = (first << 21);
626 res->end = (last << 21) + ((1 << 21) - 1);
627 res->flags = IORESOURCE_MEM;
628 pci_resource_adjust(res, &pbm->mem_space);
631 static void __devinit pci_of_scan_bus(struct pci_pbm_info *pbm,
632 struct device_node *node,
633 struct pci_bus *bus);
635 #define GET_64BIT(prop, i) ((((u64) (prop)[(i)]) << 32) | (prop)[(i)+1])
637 static void __devinit of_scan_pci_bridge(struct pci_pbm_info *pbm,
638 struct device_node *node,
642 const u32 *busrange, *ranges;
644 struct resource *res;
649 printk("of_scan_pci_bridge(%s)\n", node->full_name);
651 /* parse bus-range property */
652 busrange = of_get_property(node, "bus-range", &len);
653 if (busrange == NULL || len != 8) {
654 printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n",
658 ranges = of_get_property(node, "ranges", &len);
660 if (ranges == NULL) {
661 const char *model = of_get_property(node, "model", NULL);
662 if (model && !strcmp(model, "SUNW,simba"))
666 bus = pci_add_new_bus(dev->bus, dev, busrange[0]);
668 printk(KERN_ERR "Failed to create pci bus for %s\n",
673 bus->primary = dev->bus->number;
674 bus->subordinate = busrange[1];
677 /* parse ranges property, or cook one up by hand for Simba */
678 /* PCI #address-cells == 3 and #size-cells == 2 always */
679 res = &dev->resource[PCI_BRIDGE_RESOURCES];
680 for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) {
682 bus->resource[i] = res;
686 apb_fake_ranges(dev, bus, pbm);
688 } else if (ranges == NULL) {
689 pci_cfg_fake_ranges(dev, bus, pbm);
693 for (; len >= 32; len -= 32, ranges += 8) {
694 struct resource *root;
696 flags = pci_parse_of_flags(ranges[0]);
697 size = GET_64BIT(ranges, 6);
698 if (flags == 0 || size == 0)
700 if (flags & IORESOURCE_IO) {
701 res = bus->resource[0];
703 printk(KERN_ERR "PCI: ignoring extra I/O range"
704 " for bridge %s\n", node->full_name);
707 root = &pbm->io_space;
709 if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) {
710 printk(KERN_ERR "PCI: too many memory ranges"
711 " for bridge %s\n", node->full_name);
714 res = bus->resource[i];
716 root = &pbm->mem_space;
719 res->start = GET_64BIT(ranges, 1);
720 res->end = res->start + size - 1;
723 /* Another way to implement this would be to add an of_device
724 * layer routine that can calculate a resource for a given
725 * range property value in a PCI device.
727 pci_resource_adjust(res, root);
730 sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus),
733 printk(" bus name: %s\n", bus->name);
735 pci_of_scan_bus(pbm, node, bus);
738 static void __devinit pci_of_scan_bus(struct pci_pbm_info *pbm,
739 struct device_node *node,
742 struct device_node *child;
744 int reglen, devfn, prev_devfn;
748 printk("PCI: scan_bus[%s] bus no %d\n",
749 node->full_name, bus->number);
753 while ((child = of_get_next_child(node, child)) != NULL) {
755 printk(" * %s\n", child->full_name);
756 reg = of_get_property(child, "reg", ®len);
757 if (reg == NULL || reglen < 20)
760 devfn = (reg[0] >> 8) & 0xff;
762 /* This is a workaround for some device trees
763 * which list PCI devices twice. On the V100
764 * for example, device number 3 is listed twice.
765 * Once as "pm" and once again as "lomp".
767 if (devfn == prev_devfn)
771 /* create a new pci_dev for this device */
772 dev = of_create_pci_dev(pbm, child, bus, devfn, 0);
776 printk("PCI: dev header type: %x\n",
779 if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
780 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
781 of_scan_pci_bridge(pbm, child, dev);
786 show_pciobppath_attr(struct device * dev, struct device_attribute * attr, char * buf)
788 struct pci_dev *pdev;
789 struct device_node *dp;
791 pdev = to_pci_dev(dev);
792 dp = pdev->dev.archdata.prom_node;
794 return snprintf (buf, PAGE_SIZE, "%s\n", dp->full_name);
797 static DEVICE_ATTR(obppath, S_IRUSR | S_IRGRP | S_IROTH, show_pciobppath_attr, NULL);
799 static void __devinit pci_bus_register_of_sysfs(struct pci_bus *bus)
802 struct pci_bus *child_bus;
805 list_for_each_entry(dev, &bus->devices, bus_list) {
806 /* we don't really care if we can create this file or
807 * not, but we need to assign the result of the call
808 * or the world will fall under alien invasion and
809 * everybody will be frozen on a spaceship ready to be
810 * eaten on alpha centauri by some green and jelly
813 err = sysfs_create_file(&dev->dev.kobj, &dev_attr_obppath.attr);
815 list_for_each_entry(child_bus, &bus->children, node)
816 pci_bus_register_of_sysfs(child_bus);
819 int pci_host_bridge_read_pci_cfg(struct pci_bus *bus_dev,
824 static u8 fake_pci_config[] = {
825 0x8e, 0x10, /* Vendor: 0x108e (Sun) */
826 0xf0, 0x80, /* Device: 0x80f0 (Fire) */
827 0x46, 0x01, /* Command: 0x0146 (SERR, PARITY, MASTER, MEM) */
828 0xa0, 0x22, /* Status: 0x02a0 (DEVSEL_MED, FB2B, 66MHZ) */
829 0x00, 0x00, 0x00, 0x06, /* Class: 0x06000000 host bridge */
830 0x00, /* Cacheline: 0x00 */
831 0x40, /* Latency: 0x40 */
832 0x00, /* Header-Type: 0x00 normal */
836 if (where >= 0 && where < sizeof(fake_pci_config) &&
837 (where + size) >= 0 &&
838 (where + size) < sizeof(fake_pci_config) &&
839 size <= sizeof(u32)) {
842 *value |= fake_pci_config[where + size];
846 return PCIBIOS_SUCCESSFUL;
849 int pci_host_bridge_write_pci_cfg(struct pci_bus *bus_dev,
854 return PCIBIOS_SUCCESSFUL;
857 struct pci_bus * __devinit pci_scan_one_pbm(struct pci_pbm_info *pbm)
859 struct device_node *node = pbm->prom_node;
860 struct pci_dev *host_pdev;
863 printk("PCI: Scanning PBM %s\n", node->full_name);
865 /* XXX parent device? XXX */
866 bus = pci_create_bus(NULL, pbm->pci_first_busno, pbm->pci_ops, pbm);
868 printk(KERN_ERR "Failed to create bus for %s\n",
872 bus->secondary = pbm->pci_first_busno;
873 bus->subordinate = pbm->pci_last_busno;
875 bus->resource[0] = &pbm->io_space;
876 bus->resource[1] = &pbm->mem_space;
878 /* Create the dummy host bridge and link it in. */
879 host_pdev = of_create_pci_dev(pbm, node, bus, 0x00, 1);
880 bus->self = host_pdev;
882 pci_of_scan_bus(pbm, node, bus);
883 pci_bus_add_devices(bus);
884 pci_bus_register_of_sysfs(bus);
889 static void __init pci_scan_each_controller_bus(void)
891 struct pci_pbm_info *pbm;
893 for (pbm = pci_pbm_root; pbm; pbm = pbm->next)
897 extern void power_init(void);
899 static int __init pcibios_init(void)
901 pci_controller_probe();
902 if (pci_pbm_root == NULL)
905 pci_scan_each_controller_bus();
914 subsys_initcall(pcibios_init);
916 void __devinit pcibios_fixup_bus(struct pci_bus *pbus)
918 struct pci_pbm_info *pbm = pbus->sysdata;
920 /* Generic PCI bus probing sets these to point at
921 * &io{port,mem}_resouce which is wrong for us.
923 pbus->resource[0] = &pbm->io_space;
924 pbus->resource[1] = &pbm->mem_space;
927 struct resource *pcibios_select_root(struct pci_dev *pdev, struct resource *r)
929 struct pci_pbm_info *pbm = pdev->bus->sysdata;
930 struct resource *root = NULL;
932 if (r->flags & IORESOURCE_IO)
933 root = &pbm->io_space;
934 if (r->flags & IORESOURCE_MEM)
935 root = &pbm->mem_space;
940 void pcibios_update_irq(struct pci_dev *pdev, int irq)
944 void pcibios_align_resource(void *data, struct resource *res,
945 resource_size_t size, resource_size_t align)
949 int pcibios_enable_device(struct pci_dev *dev, int mask)
954 pci_read_config_word(dev, PCI_COMMAND, &cmd);
957 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
958 struct resource *res = &dev->resource[i];
960 /* Only set up the requested stuff */
961 if (!(mask & (1<<i)))
964 if (res->flags & IORESOURCE_IO)
965 cmd |= PCI_COMMAND_IO;
966 if (res->flags & IORESOURCE_MEM)
967 cmd |= PCI_COMMAND_MEMORY;
971 printk(KERN_DEBUG "PCI: Enabling device: (%s), cmd %x\n",
973 /* Enable the appropriate bits in the PCI command register. */
974 pci_write_config_word(dev, PCI_COMMAND, cmd);
979 void pcibios_resource_to_bus(struct pci_dev *pdev, struct pci_bus_region *region,
980 struct resource *res)
982 struct pci_pbm_info *pbm = pdev->bus->sysdata;
983 struct resource zero_res, *root;
987 zero_res.flags = res->flags;
989 if (res->flags & IORESOURCE_IO)
990 root = &pbm->io_space;
992 root = &pbm->mem_space;
994 pci_resource_adjust(&zero_res, root);
996 region->start = res->start - zero_res.start;
997 region->end = res->end - zero_res.start;
999 EXPORT_SYMBOL(pcibios_resource_to_bus);
1001 void pcibios_bus_to_resource(struct pci_dev *pdev, struct resource *res,
1002 struct pci_bus_region *region)
1004 struct pci_pbm_info *pbm = pdev->bus->sysdata;
1005 struct resource *root;
1007 res->start = region->start;
1008 res->end = region->end;
1010 if (res->flags & IORESOURCE_IO)
1011 root = &pbm->io_space;
1013 root = &pbm->mem_space;
1015 pci_resource_adjust(res, root);
1017 EXPORT_SYMBOL(pcibios_bus_to_resource);
1019 char * __devinit pcibios_setup(char *str)
1024 /* Platform support for /proc/bus/pci/X/Y mmap()s. */
1026 /* If the user uses a host-bridge as the PCI device, he may use
1027 * this to perform a raw mmap() of the I/O or MEM space behind
1030 * This can be useful for execution of x86 PCI bios initialization code
1031 * on a PCI card, like the xfree86 int10 stuff does.
1033 static int __pci_mmap_make_offset_bus(struct pci_dev *pdev, struct vm_area_struct *vma,
1034 enum pci_mmap_state mmap_state)
1036 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
1037 unsigned long space_size, user_offset, user_size;
1039 if (mmap_state == pci_mmap_io) {
1040 space_size = (pbm->io_space.end -
1041 pbm->io_space.start) + 1;
1043 space_size = (pbm->mem_space.end -
1044 pbm->mem_space.start) + 1;
1047 /* Make sure the request is in range. */
1048 user_offset = vma->vm_pgoff << PAGE_SHIFT;
1049 user_size = vma->vm_end - vma->vm_start;
1051 if (user_offset >= space_size ||
1052 (user_offset + user_size) > space_size)
1055 if (mmap_state == pci_mmap_io) {
1056 vma->vm_pgoff = (pbm->io_space.start +
1057 user_offset) >> PAGE_SHIFT;
1059 vma->vm_pgoff = (pbm->mem_space.start +
1060 user_offset) >> PAGE_SHIFT;
1066 /* Adjust vm_pgoff of VMA such that it is the physical page offset
1067 * corresponding to the 32-bit pci bus offset for DEV requested by the user.
1069 * Basically, the user finds the base address for his device which he wishes
1070 * to mmap. They read the 32-bit value from the config space base register,
1071 * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
1072 * offset parameter of mmap on /proc/bus/pci/XXX for that device.
1074 * Returns negative error code on failure, zero on success.
1076 static int __pci_mmap_make_offset(struct pci_dev *pdev,
1077 struct vm_area_struct *vma,
1078 enum pci_mmap_state mmap_state)
1080 unsigned long user_paddr, user_size;
1083 /* First compute the physical address in vma->vm_pgoff,
1084 * making sure the user offset is within range in the
1085 * appropriate PCI space.
1087 err = __pci_mmap_make_offset_bus(pdev, vma, mmap_state);
1091 /* If this is a mapping on a host bridge, any address
1094 if ((pdev->class >> 8) == PCI_CLASS_BRIDGE_HOST)
1097 /* Otherwise make sure it's in the range for one of the
1098 * device's resources.
1100 user_paddr = vma->vm_pgoff << PAGE_SHIFT;
1101 user_size = vma->vm_end - vma->vm_start;
1103 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
1104 struct resource *rp = &pdev->resource[i];
1111 if (i == PCI_ROM_RESOURCE) {
1112 if (mmap_state != pci_mmap_mem)
1115 if ((mmap_state == pci_mmap_io &&
1116 (rp->flags & IORESOURCE_IO) == 0) ||
1117 (mmap_state == pci_mmap_mem &&
1118 (rp->flags & IORESOURCE_MEM) == 0))
1122 if ((rp->start <= user_paddr) &&
1123 (user_paddr + user_size) <= (rp->end + 1UL))
1127 if (i > PCI_ROM_RESOURCE)
1133 /* Set vm_flags of VMA, as appropriate for this architecture, for a pci device
1136 static void __pci_mmap_set_flags(struct pci_dev *dev, struct vm_area_struct *vma,
1137 enum pci_mmap_state mmap_state)
1139 vma->vm_flags |= (VM_IO | VM_RESERVED);
1142 /* Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
1145 static void __pci_mmap_set_pgprot(struct pci_dev *dev, struct vm_area_struct *vma,
1146 enum pci_mmap_state mmap_state)
1148 /* Our io_remap_pfn_range takes care of this, do nothing. */
1151 /* Perform the actual remap of the pages for a PCI device mapping, as appropriate
1152 * for this architecture. The region in the process to map is described by vm_start
1153 * and vm_end members of VMA, the base physical address is found in vm_pgoff.
1154 * The pci device structure is provided so that architectures may make mapping
1155 * decisions on a per-device or per-bus basis.
1157 * Returns a negative error code on failure, zero on success.
1159 int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
1160 enum pci_mmap_state mmap_state,
1165 ret = __pci_mmap_make_offset(dev, vma, mmap_state);
1169 __pci_mmap_set_flags(dev, vma, mmap_state);
1170 __pci_mmap_set_pgprot(dev, vma, mmap_state);
1172 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1173 ret = io_remap_pfn_range(vma, vma->vm_start,
1175 vma->vm_end - vma->vm_start,
1183 /* Return the domain nuber for this pci bus */
1185 int pci_domain_nr(struct pci_bus *pbus)
1187 struct pci_pbm_info *pbm = pbus->sysdata;
1190 if (pbm == NULL || pbm->parent == NULL) {
1198 EXPORT_SYMBOL(pci_domain_nr);
1200 #ifdef CONFIG_PCI_MSI
1201 int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
1203 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
1206 if (!pbm->setup_msi_irq)
1209 return pbm->setup_msi_irq(&virt_irq, pdev, desc);
1212 void arch_teardown_msi_irq(unsigned int virt_irq)
1214 struct msi_desc *entry = get_irq_msi(virt_irq);
1215 struct pci_dev *pdev = entry->dev;
1216 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
1218 if (!pbm->teardown_msi_irq)
1221 return pbm->teardown_msi_irq(virt_irq, pdev);
1223 #endif /* !(CONFIG_PCI_MSI) */
1225 struct device_node *pci_device_to_OF_node(struct pci_dev *pdev)
1227 return pdev->dev.archdata.prom_node;
1229 EXPORT_SYMBOL(pci_device_to_OF_node);
1231 static void ali_sound_dma_hack(struct pci_dev *pdev, int set_bit)
1233 struct pci_dev *ali_isa_bridge;
1236 /* ALI sound chips generate 31-bits of DMA, a special register
1237 * determines what bit 31 is emitted as.
1239 ali_isa_bridge = pci_get_device(PCI_VENDOR_ID_AL,
1240 PCI_DEVICE_ID_AL_M1533,
1243 pci_read_config_byte(ali_isa_bridge, 0x7e, &val);
1248 pci_write_config_byte(ali_isa_bridge, 0x7e, val);
1249 pci_dev_put(ali_isa_bridge);
1252 int pci_dma_supported(struct pci_dev *pdev, u64 device_mask)
1257 dma_addr_mask = 0xffffffff;
1259 struct iommu *iommu = pdev->dev.archdata.iommu;
1261 dma_addr_mask = iommu->dma_addr_mask;
1263 if (pdev->vendor == PCI_VENDOR_ID_AL &&
1264 pdev->device == PCI_DEVICE_ID_AL_M5451 &&
1265 device_mask == 0x7fffffff) {
1266 ali_sound_dma_hack(pdev,
1267 (dma_addr_mask & 0x80000000) != 0);
1272 if (device_mask >= (1UL << 32UL))
1275 return (device_mask & dma_addr_mask) == dma_addr_mask;
1278 void pci_resource_to_user(const struct pci_dev *pdev, int bar,
1279 const struct resource *rp, resource_size_t *start,
1280 resource_size_t *end)
1282 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
1283 unsigned long offset;
1285 if (rp->flags & IORESOURCE_IO)
1286 offset = pbm->io_space.start;
1288 offset = pbm->mem_space.start;
1290 *start = rp->start - offset;
1291 *end = rp->end - offset;
1294 #endif /* !(CONFIG_PCI) */