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>
32 /* A "nop" PCI implementation. */
33 asmlinkage int sys_pciconfig_read(unsigned long bus, unsigned long dfn,
34 unsigned long off, unsigned long len,
39 asmlinkage int sys_pciconfig_write(unsigned long bus, unsigned long dfn,
40 unsigned long off, unsigned long len,
47 /* List of all PCI controllers found in the system. */
48 struct pci_pbm_info *pci_pbm_root = NULL;
50 /* Each PBM found gets a unique index. */
53 volatile int pci_poke_in_progress;
54 volatile int pci_poke_cpu = -1;
55 volatile int pci_poke_faulted;
57 static DEFINE_SPINLOCK(pci_poke_lock);
59 void pci_config_read8(u8 *addr, u8 *ret)
64 spin_lock_irqsave(&pci_poke_lock, flags);
65 pci_poke_cpu = smp_processor_id();
66 pci_poke_in_progress = 1;
68 __asm__ __volatile__("membar #Sync\n\t"
69 "lduba [%1] %2, %0\n\t"
72 : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
74 pci_poke_in_progress = 0;
76 if (!pci_poke_faulted)
78 spin_unlock_irqrestore(&pci_poke_lock, flags);
81 void pci_config_read16(u16 *addr, u16 *ret)
86 spin_lock_irqsave(&pci_poke_lock, flags);
87 pci_poke_cpu = smp_processor_id();
88 pci_poke_in_progress = 1;
90 __asm__ __volatile__("membar #Sync\n\t"
91 "lduha [%1] %2, %0\n\t"
94 : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
96 pci_poke_in_progress = 0;
98 if (!pci_poke_faulted)
100 spin_unlock_irqrestore(&pci_poke_lock, flags);
103 void pci_config_read32(u32 *addr, u32 *ret)
108 spin_lock_irqsave(&pci_poke_lock, flags);
109 pci_poke_cpu = smp_processor_id();
110 pci_poke_in_progress = 1;
111 pci_poke_faulted = 0;
112 __asm__ __volatile__("membar #Sync\n\t"
113 "lduwa [%1] %2, %0\n\t"
116 : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
118 pci_poke_in_progress = 0;
120 if (!pci_poke_faulted)
122 spin_unlock_irqrestore(&pci_poke_lock, flags);
125 void pci_config_write8(u8 *addr, u8 val)
129 spin_lock_irqsave(&pci_poke_lock, flags);
130 pci_poke_cpu = smp_processor_id();
131 pci_poke_in_progress = 1;
132 pci_poke_faulted = 0;
133 __asm__ __volatile__("membar #Sync\n\t"
134 "stba %0, [%1] %2\n\t"
137 : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
139 pci_poke_in_progress = 0;
141 spin_unlock_irqrestore(&pci_poke_lock, flags);
144 void pci_config_write16(u16 *addr, u16 val)
148 spin_lock_irqsave(&pci_poke_lock, flags);
149 pci_poke_cpu = smp_processor_id();
150 pci_poke_in_progress = 1;
151 pci_poke_faulted = 0;
152 __asm__ __volatile__("membar #Sync\n\t"
153 "stha %0, [%1] %2\n\t"
156 : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
158 pci_poke_in_progress = 0;
160 spin_unlock_irqrestore(&pci_poke_lock, flags);
163 void pci_config_write32(u32 *addr, u32 val)
167 spin_lock_irqsave(&pci_poke_lock, flags);
168 pci_poke_cpu = smp_processor_id();
169 pci_poke_in_progress = 1;
170 pci_poke_faulted = 0;
171 __asm__ __volatile__("membar #Sync\n\t"
172 "stwa %0, [%1] %2\n\t"
175 : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
177 pci_poke_in_progress = 0;
179 spin_unlock_irqrestore(&pci_poke_lock, flags);
182 /* Probe for all PCI controllers in the system. */
183 extern void sabre_init(struct device_node *, const char *);
184 extern void psycho_init(struct device_node *, const char *);
185 extern void schizo_init(struct device_node *, const char *);
186 extern void schizo_plus_init(struct device_node *, const char *);
187 extern void tomatillo_init(struct device_node *, const char *);
188 extern void sun4v_pci_init(struct device_node *, const char *);
189 extern void fire_pci_init(struct device_node *, const char *);
193 void (*init)(struct device_node *, const char *);
194 } pci_controller_table[] __initdata = {
195 { "SUNW,sabre", sabre_init },
196 { "pci108e,a000", sabre_init },
197 { "pci108e,a001", sabre_init },
198 { "SUNW,psycho", psycho_init },
199 { "pci108e,8000", psycho_init },
200 { "SUNW,schizo", schizo_init },
201 { "pci108e,8001", schizo_init },
202 { "SUNW,schizo+", schizo_plus_init },
203 { "pci108e,8002", schizo_plus_init },
204 { "SUNW,tomatillo", tomatillo_init },
205 { "pci108e,a801", tomatillo_init },
206 { "SUNW,sun4v-pci", sun4v_pci_init },
207 { "pciex108e,80f0", fire_pci_init },
209 #define PCI_NUM_CONTROLLER_TYPES ARRAY_SIZE(pci_controller_table)
211 static int __init pci_controller_init(const char *model_name, int namelen, struct device_node *dp)
215 for (i = 0; i < PCI_NUM_CONTROLLER_TYPES; i++) {
216 if (!strncmp(model_name,
217 pci_controller_table[i].model_name,
219 pci_controller_table[i].init(dp, model_name);
227 static int __init pci_controller_scan(int (*handler)(const char *, int, struct device_node *))
229 struct device_node *dp;
232 for_each_node_by_name(dp, "pci") {
233 struct property *prop;
236 prop = of_find_property(dp, "model", &len);
238 prop = of_find_property(dp, "compatible", &len);
241 const char *model = prop->value;
244 /* Our value may be a multi-valued string in the
245 * case of some compatible properties. For sanity,
246 * only try the first one.
248 while (model[item_len] && len) {
253 if (handler(model, item_len, dp))
261 /* Find each controller in the system, attach and initialize
262 * software state structure for each and link into the
263 * pci_pbm_root. Setup the controller enough such
264 * that bus scanning can be done.
266 static void __init pci_controller_probe(void)
268 printk("PCI: Probing for controllers.\n");
270 pci_controller_scan(pci_controller_init);
273 static int ofpci_verbose;
275 static int __init ofpci_debug(char *str)
279 get_option(&str, &val);
285 __setup("ofpci_debug=", ofpci_debug);
287 static unsigned long pci_parse_of_flags(u32 addr0)
289 unsigned long flags = 0;
291 if (addr0 & 0x02000000) {
292 flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY;
293 flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64;
294 flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M;
295 if (addr0 & 0x40000000)
296 flags |= IORESOURCE_PREFETCH
297 | PCI_BASE_ADDRESS_MEM_PREFETCH;
298 } else if (addr0 & 0x01000000)
299 flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO;
303 /* The of_device layer has translated all of the assigned-address properties
304 * into physical address resources, we only have to figure out the register
307 static void pci_parse_of_addrs(struct of_device *op,
308 struct device_node *node,
311 struct resource *op_res;
315 addrs = of_get_property(node, "assigned-addresses", &proplen);
319 printk(" parse addresses (%d bytes) @ %p\n",
321 op_res = &op->resource[0];
322 for (; proplen >= 20; proplen -= 20, addrs += 5, op_res++) {
323 struct resource *res;
327 flags = pci_parse_of_flags(addrs[0]);
332 printk(" start: %lx, end: %lx, i: %x\n",
333 op_res->start, op_res->end, i);
335 if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) {
336 res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2];
337 } else if (i == dev->rom_base_reg) {
338 res = &dev->resource[PCI_ROM_RESOURCE];
339 flags |= IORESOURCE_READONLY | IORESOURCE_CACHEABLE;
341 printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i);
344 res->start = op_res->start;
345 res->end = op_res->end;
347 res->name = pci_name(dev);
351 struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
352 struct device_node *node,
353 struct pci_bus *bus, int devfn,
356 struct dev_archdata *sd;
361 dev = alloc_pci_dev();
365 sd = &dev->dev.archdata;
366 sd->iommu = pbm->iommu;
368 sd->host_controller = pbm;
369 sd->prom_node = node;
370 sd->op = of_find_device_by_node(node);
371 sd->numa_node = pbm->numa_node;
373 sd = &sd->op->dev.archdata;
374 sd->iommu = pbm->iommu;
376 sd->numa_node = pbm->numa_node;
378 type = of_get_property(node, "device_type", NULL);
383 printk(" create device, devfn: %x, type: %s\n",
388 dev->dev.parent = bus->bridge;
389 dev->dev.bus = &pci_bus_type;
391 dev->multifunction = 0; /* maybe a lie? */
393 if (host_controller) {
394 if (tlb_type != hypervisor) {
395 pci_read_config_word(dev, PCI_VENDOR_ID,
397 pci_read_config_word(dev, PCI_DEVICE_ID,
400 dev->vendor = PCI_VENDOR_ID_SUN;
401 dev->device = 0x80f0;
404 dev->class = PCI_CLASS_BRIDGE_HOST << 8;
405 sprintf(pci_name(dev), "%04x:%02x:%02x.%d", pci_domain_nr(bus),
406 0x00, PCI_SLOT(devfn), PCI_FUNC(devfn));
408 dev->vendor = of_getintprop_default(node, "vendor-id", 0xffff);
409 dev->device = of_getintprop_default(node, "device-id", 0xffff);
410 dev->subsystem_vendor =
411 of_getintprop_default(node, "subsystem-vendor-id", 0);
412 dev->subsystem_device =
413 of_getintprop_default(node, "subsystem-id", 0);
415 dev->cfg_size = pci_cfg_space_size(dev);
417 /* We can't actually use the firmware value, we have
418 * to read what is in the register right now. One
419 * reason is that in the case of IDE interfaces the
420 * firmware can sample the value before the the IDE
421 * interface is programmed into native mode.
423 pci_read_config_dword(dev, PCI_CLASS_REVISION, &class);
424 dev->class = class >> 8;
425 dev->revision = class & 0xff;
427 sprintf(pci_name(dev), "%04x:%02x:%02x.%d", pci_domain_nr(bus),
428 dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));
431 printk(" class: 0x%x device name: %s\n",
432 dev->class, pci_name(dev));
434 /* I have seen IDE devices which will not respond to
435 * the bmdma simplex check reads if bus mastering is
438 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
441 dev->current_state = 4; /* unknown power state */
442 dev->error_state = pci_channel_io_normal;
444 if (host_controller) {
445 dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
446 dev->rom_base_reg = PCI_ROM_ADDRESS1;
447 dev->irq = PCI_IRQ_NONE;
449 if (!strcmp(type, "pci") || !strcmp(type, "pciex")) {
450 /* a PCI-PCI bridge */
451 dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
452 dev->rom_base_reg = PCI_ROM_ADDRESS1;
453 } else if (!strcmp(type, "cardbus")) {
454 dev->hdr_type = PCI_HEADER_TYPE_CARDBUS;
456 dev->hdr_type = PCI_HEADER_TYPE_NORMAL;
457 dev->rom_base_reg = PCI_ROM_ADDRESS;
459 dev->irq = sd->op->irqs[0];
460 if (dev->irq == 0xffffffff)
461 dev->irq = PCI_IRQ_NONE;
464 pci_parse_of_addrs(sd->op, node, dev);
467 printk(" adding to system ...\n");
469 pci_device_add(dev, bus);
474 static void __devinit apb_calc_first_last(u8 map, u32 *first_p, u32 *last_p)
476 u32 idx, first, last;
480 for (idx = 0; idx < 8; idx++) {
481 if ((map & (1 << idx)) != 0) {
493 static void pci_resource_adjust(struct resource *res,
494 struct resource *root)
496 res->start += root->start;
497 res->end += root->start;
500 /* For PCI bus devices which lack a 'ranges' property we interrogate
501 * the config space values to set the resources, just like the generic
502 * Linux PCI probing code does.
504 static void __devinit pci_cfg_fake_ranges(struct pci_dev *dev,
506 struct pci_pbm_info *pbm)
508 struct resource *res;
509 u8 io_base_lo, io_limit_lo;
510 u16 mem_base_lo, mem_limit_lo;
511 unsigned long base, limit;
513 pci_read_config_byte(dev, PCI_IO_BASE, &io_base_lo);
514 pci_read_config_byte(dev, PCI_IO_LIMIT, &io_limit_lo);
515 base = (io_base_lo & PCI_IO_RANGE_MASK) << 8;
516 limit = (io_limit_lo & PCI_IO_RANGE_MASK) << 8;
518 if ((io_base_lo & PCI_IO_RANGE_TYPE_MASK) == PCI_IO_RANGE_TYPE_32) {
519 u16 io_base_hi, io_limit_hi;
521 pci_read_config_word(dev, PCI_IO_BASE_UPPER16, &io_base_hi);
522 pci_read_config_word(dev, PCI_IO_LIMIT_UPPER16, &io_limit_hi);
523 base |= (io_base_hi << 16);
524 limit |= (io_limit_hi << 16);
527 res = bus->resource[0];
529 res->flags = (io_base_lo & PCI_IO_RANGE_TYPE_MASK) | IORESOURCE_IO;
533 res->end = limit + 0xfff;
534 pci_resource_adjust(res, &pbm->io_space);
537 pci_read_config_word(dev, PCI_MEMORY_BASE, &mem_base_lo);
538 pci_read_config_word(dev, PCI_MEMORY_LIMIT, &mem_limit_lo);
539 base = (mem_base_lo & PCI_MEMORY_RANGE_MASK) << 16;
540 limit = (mem_limit_lo & PCI_MEMORY_RANGE_MASK) << 16;
542 res = bus->resource[1];
544 res->flags = ((mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) |
547 res->end = limit + 0xfffff;
548 pci_resource_adjust(res, &pbm->mem_space);
551 pci_read_config_word(dev, PCI_PREF_MEMORY_BASE, &mem_base_lo);
552 pci_read_config_word(dev, PCI_PREF_MEMORY_LIMIT, &mem_limit_lo);
553 base = (mem_base_lo & PCI_PREF_RANGE_MASK) << 16;
554 limit = (mem_limit_lo & PCI_PREF_RANGE_MASK) << 16;
556 if ((mem_base_lo & PCI_PREF_RANGE_TYPE_MASK) == PCI_PREF_RANGE_TYPE_64) {
557 u32 mem_base_hi, mem_limit_hi;
559 pci_read_config_dword(dev, PCI_PREF_BASE_UPPER32, &mem_base_hi);
560 pci_read_config_dword(dev, PCI_PREF_LIMIT_UPPER32, &mem_limit_hi);
563 * Some bridges set the base > limit by default, and some
564 * (broken) BIOSes do not initialize them. If we find
565 * this, just assume they are not being used.
567 if (mem_base_hi <= mem_limit_hi) {
568 base |= ((long) mem_base_hi) << 32;
569 limit |= ((long) mem_limit_hi) << 32;
573 res = bus->resource[2];
575 res->flags = ((mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) |
576 IORESOURCE_MEM | IORESOURCE_PREFETCH);
578 res->end = limit + 0xfffff;
579 pci_resource_adjust(res, &pbm->mem_space);
583 /* Cook up fake bus resources for SUNW,simba PCI bridges which lack
584 * a proper 'ranges' property.
586 static void __devinit apb_fake_ranges(struct pci_dev *dev,
588 struct pci_pbm_info *pbm)
590 struct resource *res;
594 pci_read_config_byte(dev, APB_IO_ADDRESS_MAP, &map);
595 apb_calc_first_last(map, &first, &last);
596 res = bus->resource[0];
597 res->start = (first << 21);
598 res->end = (last << 21) + ((1 << 21) - 1);
599 res->flags = IORESOURCE_IO;
600 pci_resource_adjust(res, &pbm->io_space);
602 pci_read_config_byte(dev, APB_MEM_ADDRESS_MAP, &map);
603 apb_calc_first_last(map, &first, &last);
604 res = bus->resource[1];
605 res->start = (first << 21);
606 res->end = (last << 21) + ((1 << 21) - 1);
607 res->flags = IORESOURCE_MEM;
608 pci_resource_adjust(res, &pbm->mem_space);
611 static void __devinit pci_of_scan_bus(struct pci_pbm_info *pbm,
612 struct device_node *node,
613 struct pci_bus *bus);
615 #define GET_64BIT(prop, i) ((((u64) (prop)[(i)]) << 32) | (prop)[(i)+1])
617 static void __devinit of_scan_pci_bridge(struct pci_pbm_info *pbm,
618 struct device_node *node,
622 const u32 *busrange, *ranges;
624 struct resource *res;
629 printk("of_scan_pci_bridge(%s)\n", node->full_name);
631 /* parse bus-range property */
632 busrange = of_get_property(node, "bus-range", &len);
633 if (busrange == NULL || len != 8) {
634 printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n",
638 ranges = of_get_property(node, "ranges", &len);
640 if (ranges == NULL) {
641 const char *model = of_get_property(node, "model", NULL);
642 if (model && !strcmp(model, "SUNW,simba"))
646 bus = pci_add_new_bus(dev->bus, dev, busrange[0]);
648 printk(KERN_ERR "Failed to create pci bus for %s\n",
653 bus->primary = dev->bus->number;
654 bus->subordinate = busrange[1];
657 /* parse ranges property, or cook one up by hand for Simba */
658 /* PCI #address-cells == 3 and #size-cells == 2 always */
659 res = &dev->resource[PCI_BRIDGE_RESOURCES];
660 for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) {
662 bus->resource[i] = res;
666 apb_fake_ranges(dev, bus, pbm);
668 } else if (ranges == NULL) {
669 pci_cfg_fake_ranges(dev, bus, pbm);
673 for (; len >= 32; len -= 32, ranges += 8) {
674 struct resource *root;
676 flags = pci_parse_of_flags(ranges[0]);
677 size = GET_64BIT(ranges, 6);
678 if (flags == 0 || size == 0)
680 if (flags & IORESOURCE_IO) {
681 res = bus->resource[0];
683 printk(KERN_ERR "PCI: ignoring extra I/O range"
684 " for bridge %s\n", node->full_name);
687 root = &pbm->io_space;
689 if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) {
690 printk(KERN_ERR "PCI: too many memory ranges"
691 " for bridge %s\n", node->full_name);
694 res = bus->resource[i];
696 root = &pbm->mem_space;
699 res->start = GET_64BIT(ranges, 1);
700 res->end = res->start + size - 1;
703 /* Another way to implement this would be to add an of_device
704 * layer routine that can calculate a resource for a given
705 * range property value in a PCI device.
707 pci_resource_adjust(res, root);
710 sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus),
713 printk(" bus name: %s\n", bus->name);
715 pci_of_scan_bus(pbm, node, bus);
718 static void __devinit pci_of_scan_bus(struct pci_pbm_info *pbm,
719 struct device_node *node,
722 struct device_node *child;
724 int reglen, devfn, prev_devfn;
728 printk("PCI: scan_bus[%s] bus no %d\n",
729 node->full_name, bus->number);
733 while ((child = of_get_next_child(node, child)) != NULL) {
735 printk(" * %s\n", child->full_name);
736 reg = of_get_property(child, "reg", ®len);
737 if (reg == NULL || reglen < 20)
740 devfn = (reg[0] >> 8) & 0xff;
742 /* This is a workaround for some device trees
743 * which list PCI devices twice. On the V100
744 * for example, device number 3 is listed twice.
745 * Once as "pm" and once again as "lomp".
747 if (devfn == prev_devfn)
751 /* create a new pci_dev for this device */
752 dev = of_create_pci_dev(pbm, child, bus, devfn, 0);
756 printk("PCI: dev header type: %x\n",
759 if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
760 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
761 of_scan_pci_bridge(pbm, child, dev);
766 show_pciobppath_attr(struct device * dev, struct device_attribute * attr, char * buf)
768 struct pci_dev *pdev;
769 struct device_node *dp;
771 pdev = to_pci_dev(dev);
772 dp = pdev->dev.archdata.prom_node;
774 return snprintf (buf, PAGE_SIZE, "%s\n", dp->full_name);
777 static DEVICE_ATTR(obppath, S_IRUSR | S_IRGRP | S_IROTH, show_pciobppath_attr, NULL);
779 static void __devinit pci_bus_register_of_sysfs(struct pci_bus *bus)
782 struct pci_bus *child_bus;
785 list_for_each_entry(dev, &bus->devices, bus_list) {
786 /* we don't really care if we can create this file or
787 * not, but we need to assign the result of the call
788 * or the world will fall under alien invasion and
789 * everybody will be frozen on a spaceship ready to be
790 * eaten on alpha centauri by some green and jelly
793 err = sysfs_create_file(&dev->dev.kobj, &dev_attr_obppath.attr);
795 list_for_each_entry(child_bus, &bus->children, node)
796 pci_bus_register_of_sysfs(child_bus);
799 int pci_host_bridge_read_pci_cfg(struct pci_bus *bus_dev,
804 static u8 fake_pci_config[] = {
805 0x8e, 0x10, /* Vendor: 0x108e (Sun) */
806 0xf0, 0x80, /* Device: 0x80f0 (Fire) */
807 0x46, 0x01, /* Command: 0x0146 (SERR, PARITY, MASTER, MEM) */
808 0xa0, 0x22, /* Status: 0x02a0 (DEVSEL_MED, FB2B, 66MHZ) */
809 0x00, 0x00, 0x00, 0x06, /* Class: 0x06000000 host bridge */
810 0x00, /* Cacheline: 0x00 */
811 0x40, /* Latency: 0x40 */
812 0x00, /* Header-Type: 0x00 normal */
816 if (where >= 0 && where < sizeof(fake_pci_config) &&
817 (where + size) >= 0 &&
818 (where + size) < sizeof(fake_pci_config) &&
819 size <= sizeof(u32)) {
822 *value |= fake_pci_config[where + size];
826 return PCIBIOS_SUCCESSFUL;
829 int pci_host_bridge_write_pci_cfg(struct pci_bus *bus_dev,
834 return PCIBIOS_SUCCESSFUL;
837 struct pci_bus * __devinit pci_scan_one_pbm(struct pci_pbm_info *pbm)
839 struct device_node *node = pbm->prom_node;
840 struct pci_dev *host_pdev;
843 printk("PCI: Scanning PBM %s\n", node->full_name);
845 /* XXX parent device? XXX */
846 bus = pci_create_bus(NULL, pbm->pci_first_busno, pbm->pci_ops, pbm);
848 printk(KERN_ERR "Failed to create bus for %s\n",
852 bus->secondary = pbm->pci_first_busno;
853 bus->subordinate = pbm->pci_last_busno;
855 bus->resource[0] = &pbm->io_space;
856 bus->resource[1] = &pbm->mem_space;
858 /* Create the dummy host bridge and link it in. */
859 host_pdev = of_create_pci_dev(pbm, node, bus, 0x00, 1);
860 bus->self = host_pdev;
862 pci_of_scan_bus(pbm, node, bus);
863 pci_bus_add_devices(bus);
864 pci_bus_register_of_sysfs(bus);
869 static void __init pci_scan_each_controller_bus(void)
871 struct pci_pbm_info *pbm;
873 for (pbm = pci_pbm_root; pbm; pbm = pbm->next)
877 extern void power_init(void);
879 static int __init pcibios_init(void)
881 pci_controller_probe();
882 if (pci_pbm_root == NULL)
885 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,
1163 int pcibus_to_node(struct pci_bus *pbus)
1165 struct pci_pbm_info *pbm = pbus->sysdata;
1167 return pbm->numa_node;
1169 EXPORT_SYMBOL(pcibus_to_node);
1172 /* Return the domain nuber for this pci bus */
1174 int pci_domain_nr(struct pci_bus *pbus)
1176 struct pci_pbm_info *pbm = pbus->sysdata;
1179 if (pbm == NULL || pbm->parent == NULL) {
1187 EXPORT_SYMBOL(pci_domain_nr);
1189 #ifdef CONFIG_PCI_MSI
1190 int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
1192 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
1195 if (!pbm->setup_msi_irq)
1198 return pbm->setup_msi_irq(&virt_irq, pdev, desc);
1201 void arch_teardown_msi_irq(unsigned int virt_irq)
1203 struct msi_desc *entry = get_irq_msi(virt_irq);
1204 struct pci_dev *pdev = entry->dev;
1205 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
1207 if (!pbm->teardown_msi_irq)
1210 return pbm->teardown_msi_irq(virt_irq, pdev);
1212 #endif /* !(CONFIG_PCI_MSI) */
1214 struct device_node *pci_device_to_OF_node(struct pci_dev *pdev)
1216 return pdev->dev.archdata.prom_node;
1218 EXPORT_SYMBOL(pci_device_to_OF_node);
1220 static void ali_sound_dma_hack(struct pci_dev *pdev, int set_bit)
1222 struct pci_dev *ali_isa_bridge;
1225 /* ALI sound chips generate 31-bits of DMA, a special register
1226 * determines what bit 31 is emitted as.
1228 ali_isa_bridge = pci_get_device(PCI_VENDOR_ID_AL,
1229 PCI_DEVICE_ID_AL_M1533,
1232 pci_read_config_byte(ali_isa_bridge, 0x7e, &val);
1237 pci_write_config_byte(ali_isa_bridge, 0x7e, val);
1238 pci_dev_put(ali_isa_bridge);
1241 int pci_dma_supported(struct pci_dev *pdev, u64 device_mask)
1246 dma_addr_mask = 0xffffffff;
1248 struct iommu *iommu = pdev->dev.archdata.iommu;
1250 dma_addr_mask = iommu->dma_addr_mask;
1252 if (pdev->vendor == PCI_VENDOR_ID_AL &&
1253 pdev->device == PCI_DEVICE_ID_AL_M5451 &&
1254 device_mask == 0x7fffffff) {
1255 ali_sound_dma_hack(pdev,
1256 (dma_addr_mask & 0x80000000) != 0);
1261 if (device_mask >= (1UL << 32UL))
1264 return (device_mask & dma_addr_mask) == dma_addr_mask;
1267 void pci_resource_to_user(const struct pci_dev *pdev, int bar,
1268 const struct resource *rp, resource_size_t *start,
1269 resource_size_t *end)
1271 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
1272 unsigned long offset;
1274 if (rp->flags & IORESOURCE_IO)
1275 offset = pbm->io_space.start;
1277 offset = pbm->mem_space.start;
1279 *start = rp->start - offset;
1280 *end = rp->end - offset;
1283 #endif /* !(CONFIG_PCI) */