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 <linux/of_device.h>
24 #include <asm/uaccess.h>
25 #include <asm/pgtable.h>
32 /* List of all PCI controllers found in the system. */
33 struct pci_pbm_info *pci_pbm_root = NULL;
35 /* Each PBM found gets a unique index. */
38 volatile int pci_poke_in_progress;
39 volatile int pci_poke_cpu = -1;
40 volatile int pci_poke_faulted;
42 static DEFINE_SPINLOCK(pci_poke_lock);
44 void pci_config_read8(u8 *addr, u8 *ret)
49 spin_lock_irqsave(&pci_poke_lock, flags);
50 pci_poke_cpu = smp_processor_id();
51 pci_poke_in_progress = 1;
53 __asm__ __volatile__("membar #Sync\n\t"
54 "lduba [%1] %2, %0\n\t"
57 : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
59 pci_poke_in_progress = 0;
61 if (!pci_poke_faulted)
63 spin_unlock_irqrestore(&pci_poke_lock, flags);
66 void pci_config_read16(u16 *addr, u16 *ret)
71 spin_lock_irqsave(&pci_poke_lock, flags);
72 pci_poke_cpu = smp_processor_id();
73 pci_poke_in_progress = 1;
75 __asm__ __volatile__("membar #Sync\n\t"
76 "lduha [%1] %2, %0\n\t"
79 : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
81 pci_poke_in_progress = 0;
83 if (!pci_poke_faulted)
85 spin_unlock_irqrestore(&pci_poke_lock, flags);
88 void pci_config_read32(u32 *addr, u32 *ret)
93 spin_lock_irqsave(&pci_poke_lock, flags);
94 pci_poke_cpu = smp_processor_id();
95 pci_poke_in_progress = 1;
97 __asm__ __volatile__("membar #Sync\n\t"
98 "lduwa [%1] %2, %0\n\t"
101 : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
103 pci_poke_in_progress = 0;
105 if (!pci_poke_faulted)
107 spin_unlock_irqrestore(&pci_poke_lock, flags);
110 void pci_config_write8(u8 *addr, u8 val)
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"
122 : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
124 pci_poke_in_progress = 0;
126 spin_unlock_irqrestore(&pci_poke_lock, flags);
129 void pci_config_write16(u16 *addr, u16 val)
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"
141 : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
143 pci_poke_in_progress = 0;
145 spin_unlock_irqrestore(&pci_poke_lock, flags);
148 void pci_config_write32(u32 *addr, u32 val)
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"
160 : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
162 pci_poke_in_progress = 0;
164 spin_unlock_irqrestore(&pci_poke_lock, flags);
167 static int ofpci_verbose;
169 static int __init ofpci_debug(char *str)
173 get_option(&str, &val);
179 __setup("ofpci_debug=", ofpci_debug);
181 static unsigned long pci_parse_of_flags(u32 addr0)
183 unsigned long flags = 0;
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;
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
201 static void pci_parse_of_addrs(struct of_device *op,
202 struct device_node *node,
205 struct resource *op_res;
209 addrs = of_get_property(node, "assigned-addresses", &proplen);
213 printk(" parse addresses (%d bytes) @ %p\n",
215 op_res = &op->resource[0];
216 for (; proplen >= 20; proplen -= 20, addrs += 5, op_res++) {
217 struct resource *res;
221 flags = pci_parse_of_flags(addrs[0]);
226 printk(" start: %llx, end: %llx, i: %x\n",
227 op_res->start, op_res->end, i);
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;
235 printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i);
238 res->start = op_res->start;
239 res->end = op_res->end;
241 res->name = pci_name(dev);
245 static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
246 struct device_node *node,
247 struct pci_bus *bus, int devfn)
249 struct dev_archdata *sd;
250 struct of_device *op;
255 dev = alloc_pci_dev();
259 sd = &dev->dev.archdata;
260 sd->iommu = pbm->iommu;
262 sd->host_controller = pbm;
263 sd->prom_node = node;
264 sd->op = op = of_find_device_by_node(node);
265 sd->numa_node = pbm->numa_node;
267 sd = &op->dev.archdata;
268 sd->iommu = pbm->iommu;
270 sd->numa_node = pbm->numa_node;
272 if (!strcmp(node->name, "ebus"))
273 of_propagate_archdata(op);
275 type = of_get_property(node, "device_type", NULL);
280 printk(" create device, devfn: %x, type: %s\n",
285 dev->dev.parent = bus->bridge;
286 dev->dev.bus = &pci_bus_type;
288 dev->multifunction = 0; /* maybe a lie? */
290 dev->vendor = of_getintprop_default(node, "vendor-id", 0xffff);
291 dev->device = of_getintprop_default(node, "device-id", 0xffff);
292 dev->subsystem_vendor =
293 of_getintprop_default(node, "subsystem-vendor-id", 0);
294 dev->subsystem_device =
295 of_getintprop_default(node, "subsystem-id", 0);
297 dev->cfg_size = pci_cfg_space_size(dev);
299 /* We can't actually use the firmware value, we have
300 * to read what is in the register right now. One
301 * reason is that in the case of IDE interfaces the
302 * firmware can sample the value before the the IDE
303 * interface is programmed into native mode.
305 pci_read_config_dword(dev, PCI_CLASS_REVISION, &class);
306 dev->class = class >> 8;
307 dev->revision = class & 0xff;
309 dev_set_name(&dev->dev, "%04x:%02x:%02x.%d", pci_domain_nr(bus),
310 dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));
313 printk(" class: 0x%x device name: %s\n",
314 dev->class, pci_name(dev));
316 /* I have seen IDE devices which will not respond to
317 * the bmdma simplex check reads if bus mastering is
320 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
323 dev->current_state = 4; /* unknown power state */
324 dev->error_state = pci_channel_io_normal;
326 if (!strcmp(node->name, "pci")) {
327 /* a PCI-PCI bridge */
328 dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
329 dev->rom_base_reg = PCI_ROM_ADDRESS1;
330 } else if (!strcmp(type, "cardbus")) {
331 dev->hdr_type = PCI_HEADER_TYPE_CARDBUS;
333 dev->hdr_type = PCI_HEADER_TYPE_NORMAL;
334 dev->rom_base_reg = PCI_ROM_ADDRESS;
336 dev->irq = sd->op->irqs[0];
337 if (dev->irq == 0xffffffff)
338 dev->irq = PCI_IRQ_NONE;
341 pci_parse_of_addrs(sd->op, node, dev);
344 printk(" adding to system ...\n");
346 pci_device_add(dev, bus);
351 static void __devinit apb_calc_first_last(u8 map, u32 *first_p, u32 *last_p)
353 u32 idx, first, last;
357 for (idx = 0; idx < 8; idx++) {
358 if ((map & (1 << idx)) != 0) {
370 static void pci_resource_adjust(struct resource *res,
371 struct resource *root)
373 res->start += root->start;
374 res->end += root->start;
377 /* For PCI bus devices which lack a 'ranges' property we interrogate
378 * the config space values to set the resources, just like the generic
379 * Linux PCI probing code does.
381 static void __devinit pci_cfg_fake_ranges(struct pci_dev *dev,
383 struct pci_pbm_info *pbm)
385 struct resource *res;
386 u8 io_base_lo, io_limit_lo;
387 u16 mem_base_lo, mem_limit_lo;
388 unsigned long base, limit;
390 pci_read_config_byte(dev, PCI_IO_BASE, &io_base_lo);
391 pci_read_config_byte(dev, PCI_IO_LIMIT, &io_limit_lo);
392 base = (io_base_lo & PCI_IO_RANGE_MASK) << 8;
393 limit = (io_limit_lo & PCI_IO_RANGE_MASK) << 8;
395 if ((io_base_lo & PCI_IO_RANGE_TYPE_MASK) == PCI_IO_RANGE_TYPE_32) {
396 u16 io_base_hi, io_limit_hi;
398 pci_read_config_word(dev, PCI_IO_BASE_UPPER16, &io_base_hi);
399 pci_read_config_word(dev, PCI_IO_LIMIT_UPPER16, &io_limit_hi);
400 base |= (io_base_hi << 16);
401 limit |= (io_limit_hi << 16);
404 res = bus->resource[0];
406 res->flags = (io_base_lo & PCI_IO_RANGE_TYPE_MASK) | IORESOURCE_IO;
410 res->end = limit + 0xfff;
411 pci_resource_adjust(res, &pbm->io_space);
414 pci_read_config_word(dev, PCI_MEMORY_BASE, &mem_base_lo);
415 pci_read_config_word(dev, PCI_MEMORY_LIMIT, &mem_limit_lo);
416 base = (mem_base_lo & PCI_MEMORY_RANGE_MASK) << 16;
417 limit = (mem_limit_lo & PCI_MEMORY_RANGE_MASK) << 16;
419 res = bus->resource[1];
421 res->flags = ((mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) |
424 res->end = limit + 0xfffff;
425 pci_resource_adjust(res, &pbm->mem_space);
428 pci_read_config_word(dev, PCI_PREF_MEMORY_BASE, &mem_base_lo);
429 pci_read_config_word(dev, PCI_PREF_MEMORY_LIMIT, &mem_limit_lo);
430 base = (mem_base_lo & PCI_PREF_RANGE_MASK) << 16;
431 limit = (mem_limit_lo & PCI_PREF_RANGE_MASK) << 16;
433 if ((mem_base_lo & PCI_PREF_RANGE_TYPE_MASK) == PCI_PREF_RANGE_TYPE_64) {
434 u32 mem_base_hi, mem_limit_hi;
436 pci_read_config_dword(dev, PCI_PREF_BASE_UPPER32, &mem_base_hi);
437 pci_read_config_dword(dev, PCI_PREF_LIMIT_UPPER32, &mem_limit_hi);
440 * Some bridges set the base > limit by default, and some
441 * (broken) BIOSes do not initialize them. If we find
442 * this, just assume they are not being used.
444 if (mem_base_hi <= mem_limit_hi) {
445 base |= ((long) mem_base_hi) << 32;
446 limit |= ((long) mem_limit_hi) << 32;
450 res = bus->resource[2];
452 res->flags = ((mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) |
453 IORESOURCE_MEM | IORESOURCE_PREFETCH);
455 res->end = limit + 0xfffff;
456 pci_resource_adjust(res, &pbm->mem_space);
460 /* Cook up fake bus resources for SUNW,simba PCI bridges which lack
461 * a proper 'ranges' property.
463 static void __devinit apb_fake_ranges(struct pci_dev *dev,
465 struct pci_pbm_info *pbm)
467 struct resource *res;
471 pci_read_config_byte(dev, APB_IO_ADDRESS_MAP, &map);
472 apb_calc_first_last(map, &first, &last);
473 res = bus->resource[0];
474 res->start = (first << 21);
475 res->end = (last << 21) + ((1 << 21) - 1);
476 res->flags = IORESOURCE_IO;
477 pci_resource_adjust(res, &pbm->io_space);
479 pci_read_config_byte(dev, APB_MEM_ADDRESS_MAP, &map);
480 apb_calc_first_last(map, &first, &last);
481 res = bus->resource[1];
482 res->start = (first << 21);
483 res->end = (last << 21) + ((1 << 21) - 1);
484 res->flags = IORESOURCE_MEM;
485 pci_resource_adjust(res, &pbm->mem_space);
488 static void __devinit pci_of_scan_bus(struct pci_pbm_info *pbm,
489 struct device_node *node,
490 struct pci_bus *bus);
492 #define GET_64BIT(prop, i) ((((u64) (prop)[(i)]) << 32) | (prop)[(i)+1])
494 static void __devinit of_scan_pci_bridge(struct pci_pbm_info *pbm,
495 struct device_node *node,
499 const u32 *busrange, *ranges;
501 struct resource *res;
506 printk("of_scan_pci_bridge(%s)\n", node->full_name);
508 /* parse bus-range property */
509 busrange = of_get_property(node, "bus-range", &len);
510 if (busrange == NULL || len != 8) {
511 printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n",
515 ranges = of_get_property(node, "ranges", &len);
517 if (ranges == NULL) {
518 const char *model = of_get_property(node, "model", NULL);
519 if (model && !strcmp(model, "SUNW,simba"))
523 bus = pci_add_new_bus(dev->bus, dev, busrange[0]);
525 printk(KERN_ERR "Failed to create pci bus for %s\n",
530 bus->primary = dev->bus->number;
531 bus->subordinate = busrange[1];
534 /* parse ranges property, or cook one up by hand for Simba */
535 /* PCI #address-cells == 3 and #size-cells == 2 always */
536 res = &dev->resource[PCI_BRIDGE_RESOURCES];
537 for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) {
539 bus->resource[i] = res;
543 apb_fake_ranges(dev, bus, pbm);
545 } else if (ranges == NULL) {
546 pci_cfg_fake_ranges(dev, bus, pbm);
550 for (; len >= 32; len -= 32, ranges += 8) {
551 struct resource *root;
553 flags = pci_parse_of_flags(ranges[0]);
554 size = GET_64BIT(ranges, 6);
555 if (flags == 0 || size == 0)
557 if (flags & IORESOURCE_IO) {
558 res = bus->resource[0];
560 printk(KERN_ERR "PCI: ignoring extra I/O range"
561 " for bridge %s\n", node->full_name);
564 root = &pbm->io_space;
566 if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) {
567 printk(KERN_ERR "PCI: too many memory ranges"
568 " for bridge %s\n", node->full_name);
571 res = bus->resource[i];
573 root = &pbm->mem_space;
576 res->start = GET_64BIT(ranges, 1);
577 res->end = res->start + size - 1;
580 /* Another way to implement this would be to add an of_device
581 * layer routine that can calculate a resource for a given
582 * range property value in a PCI device.
584 pci_resource_adjust(res, root);
587 sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus),
590 printk(" bus name: %s\n", bus->name);
592 pci_of_scan_bus(pbm, node, bus);
595 static void __devinit pci_of_scan_bus(struct pci_pbm_info *pbm,
596 struct device_node *node,
599 struct device_node *child;
601 int reglen, devfn, prev_devfn;
605 printk("PCI: scan_bus[%s] bus no %d\n",
606 node->full_name, bus->number);
610 while ((child = of_get_next_child(node, child)) != NULL) {
612 printk(" * %s\n", child->full_name);
613 reg = of_get_property(child, "reg", ®len);
614 if (reg == NULL || reglen < 20)
617 devfn = (reg[0] >> 8) & 0xff;
619 /* This is a workaround for some device trees
620 * which list PCI devices twice. On the V100
621 * for example, device number 3 is listed twice.
622 * Once as "pm" and once again as "lomp".
624 if (devfn == prev_devfn)
628 /* create a new pci_dev for this device */
629 dev = of_create_pci_dev(pbm, child, bus, devfn);
633 printk("PCI: dev header type: %x\n",
636 if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
637 dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
638 of_scan_pci_bridge(pbm, child, dev);
643 show_pciobppath_attr(struct device * dev, struct device_attribute * attr, char * buf)
645 struct pci_dev *pdev;
646 struct device_node *dp;
648 pdev = to_pci_dev(dev);
649 dp = pdev->dev.archdata.prom_node;
651 return snprintf (buf, PAGE_SIZE, "%s\n", dp->full_name);
654 static DEVICE_ATTR(obppath, S_IRUSR | S_IRGRP | S_IROTH, show_pciobppath_attr, NULL);
656 static void __devinit pci_bus_register_of_sysfs(struct pci_bus *bus)
659 struct pci_bus *child_bus;
662 list_for_each_entry(dev, &bus->devices, bus_list) {
663 /* we don't really care if we can create this file or
664 * not, but we need to assign the result of the call
665 * or the world will fall under alien invasion and
666 * everybody will be frozen on a spaceship ready to be
667 * eaten on alpha centauri by some green and jelly
670 err = sysfs_create_file(&dev->dev.kobj, &dev_attr_obppath.attr);
672 list_for_each_entry(child_bus, &bus->children, node)
673 pci_bus_register_of_sysfs(child_bus);
676 struct pci_bus * __devinit pci_scan_one_pbm(struct pci_pbm_info *pbm,
677 struct device *parent)
679 struct device_node *node = pbm->op->node;
682 printk("PCI: Scanning PBM %s\n", node->full_name);
684 bus = pci_create_bus(parent, pbm->pci_first_busno, pbm->pci_ops, pbm);
686 printk(KERN_ERR "Failed to create bus for %s\n",
690 bus->secondary = pbm->pci_first_busno;
691 bus->subordinate = pbm->pci_last_busno;
693 bus->resource[0] = &pbm->io_space;
694 bus->resource[1] = &pbm->mem_space;
696 pci_of_scan_bus(pbm, node, bus);
697 pci_bus_add_devices(bus);
698 pci_bus_register_of_sysfs(bus);
703 void __devinit pcibios_fixup_bus(struct pci_bus *pbus)
705 struct pci_pbm_info *pbm = pbus->sysdata;
707 /* Generic PCI bus probing sets these to point at
708 * &io{port,mem}_resouce which is wrong for us.
710 pbus->resource[0] = &pbm->io_space;
711 pbus->resource[1] = &pbm->mem_space;
714 struct resource *pcibios_select_root(struct pci_dev *pdev, struct resource *r)
716 struct pci_pbm_info *pbm = pdev->bus->sysdata;
717 struct resource *root = NULL;
719 if (r->flags & IORESOURCE_IO)
720 root = &pbm->io_space;
721 if (r->flags & IORESOURCE_MEM)
722 root = &pbm->mem_space;
727 void pcibios_update_irq(struct pci_dev *pdev, int irq)
731 void pcibios_align_resource(void *data, struct resource *res,
732 resource_size_t size, resource_size_t align)
736 int pcibios_enable_device(struct pci_dev *dev, int mask)
741 pci_read_config_word(dev, PCI_COMMAND, &cmd);
744 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
745 struct resource *res = &dev->resource[i];
747 /* Only set up the requested stuff */
748 if (!(mask & (1<<i)))
751 if (res->flags & IORESOURCE_IO)
752 cmd |= PCI_COMMAND_IO;
753 if (res->flags & IORESOURCE_MEM)
754 cmd |= PCI_COMMAND_MEMORY;
758 printk(KERN_DEBUG "PCI: Enabling device: (%s), cmd %x\n",
760 /* Enable the appropriate bits in the PCI command register. */
761 pci_write_config_word(dev, PCI_COMMAND, cmd);
766 void pcibios_resource_to_bus(struct pci_dev *pdev, struct pci_bus_region *region,
767 struct resource *res)
769 struct pci_pbm_info *pbm = pdev->bus->sysdata;
770 struct resource zero_res, *root;
774 zero_res.flags = res->flags;
776 if (res->flags & IORESOURCE_IO)
777 root = &pbm->io_space;
779 root = &pbm->mem_space;
781 pci_resource_adjust(&zero_res, root);
783 region->start = res->start - zero_res.start;
784 region->end = res->end - zero_res.start;
786 EXPORT_SYMBOL(pcibios_resource_to_bus);
788 void pcibios_bus_to_resource(struct pci_dev *pdev, struct resource *res,
789 struct pci_bus_region *region)
791 struct pci_pbm_info *pbm = pdev->bus->sysdata;
792 struct resource *root;
794 res->start = region->start;
795 res->end = region->end;
797 if (res->flags & IORESOURCE_IO)
798 root = &pbm->io_space;
800 root = &pbm->mem_space;
802 pci_resource_adjust(res, root);
804 EXPORT_SYMBOL(pcibios_bus_to_resource);
806 char * __devinit pcibios_setup(char *str)
811 /* Platform support for /proc/bus/pci/X/Y mmap()s. */
813 /* If the user uses a host-bridge as the PCI device, he may use
814 * this to perform a raw mmap() of the I/O or MEM space behind
817 * This can be useful for execution of x86 PCI bios initialization code
818 * on a PCI card, like the xfree86 int10 stuff does.
820 static int __pci_mmap_make_offset_bus(struct pci_dev *pdev, struct vm_area_struct *vma,
821 enum pci_mmap_state mmap_state)
823 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
824 unsigned long space_size, user_offset, user_size;
826 if (mmap_state == pci_mmap_io) {
827 space_size = (pbm->io_space.end -
828 pbm->io_space.start) + 1;
830 space_size = (pbm->mem_space.end -
831 pbm->mem_space.start) + 1;
834 /* Make sure the request is in range. */
835 user_offset = vma->vm_pgoff << PAGE_SHIFT;
836 user_size = vma->vm_end - vma->vm_start;
838 if (user_offset >= space_size ||
839 (user_offset + user_size) > space_size)
842 if (mmap_state == pci_mmap_io) {
843 vma->vm_pgoff = (pbm->io_space.start +
844 user_offset) >> PAGE_SHIFT;
846 vma->vm_pgoff = (pbm->mem_space.start +
847 user_offset) >> PAGE_SHIFT;
853 /* Adjust vm_pgoff of VMA such that it is the physical page offset
854 * corresponding to the 32-bit pci bus offset for DEV requested by the user.
856 * Basically, the user finds the base address for his device which he wishes
857 * to mmap. They read the 32-bit value from the config space base register,
858 * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
859 * offset parameter of mmap on /proc/bus/pci/XXX for that device.
861 * Returns negative error code on failure, zero on success.
863 static int __pci_mmap_make_offset(struct pci_dev *pdev,
864 struct vm_area_struct *vma,
865 enum pci_mmap_state mmap_state)
867 unsigned long user_paddr, user_size;
870 /* First compute the physical address in vma->vm_pgoff,
871 * making sure the user offset is within range in the
872 * appropriate PCI space.
874 err = __pci_mmap_make_offset_bus(pdev, vma, mmap_state);
878 /* If this is a mapping on a host bridge, any address
881 if ((pdev->class >> 8) == PCI_CLASS_BRIDGE_HOST)
884 /* Otherwise make sure it's in the range for one of the
885 * device's resources.
887 user_paddr = vma->vm_pgoff << PAGE_SHIFT;
888 user_size = vma->vm_end - vma->vm_start;
890 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
891 struct resource *rp = &pdev->resource[i];
892 resource_size_t aligned_end;
899 if (i == PCI_ROM_RESOURCE) {
900 if (mmap_state != pci_mmap_mem)
903 if ((mmap_state == pci_mmap_io &&
904 (rp->flags & IORESOURCE_IO) == 0) ||
905 (mmap_state == pci_mmap_mem &&
906 (rp->flags & IORESOURCE_MEM) == 0))
910 /* Align the resource end to the next page address.
911 * PAGE_SIZE intentionally added instead of (PAGE_SIZE - 1),
912 * because actually we need the address of the next byte
915 aligned_end = (rp->end + PAGE_SIZE) & PAGE_MASK;
917 if ((rp->start <= user_paddr) &&
918 (user_paddr + user_size) <= aligned_end)
922 if (i > PCI_ROM_RESOURCE)
928 /* Set vm_flags of VMA, as appropriate for this architecture, for a pci device
931 static void __pci_mmap_set_flags(struct pci_dev *dev, struct vm_area_struct *vma,
932 enum pci_mmap_state mmap_state)
934 vma->vm_flags |= (VM_IO | VM_RESERVED);
937 /* Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
940 static void __pci_mmap_set_pgprot(struct pci_dev *dev, struct vm_area_struct *vma,
941 enum pci_mmap_state mmap_state)
943 /* Our io_remap_pfn_range takes care of this, do nothing. */
946 /* Perform the actual remap of the pages for a PCI device mapping, as appropriate
947 * for this architecture. The region in the process to map is described by vm_start
948 * and vm_end members of VMA, the base physical address is found in vm_pgoff.
949 * The pci device structure is provided so that architectures may make mapping
950 * decisions on a per-device or per-bus basis.
952 * Returns a negative error code on failure, zero on success.
954 int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
955 enum pci_mmap_state mmap_state,
960 ret = __pci_mmap_make_offset(dev, vma, mmap_state);
964 __pci_mmap_set_flags(dev, vma, mmap_state);
965 __pci_mmap_set_pgprot(dev, vma, mmap_state);
967 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
968 ret = io_remap_pfn_range(vma, vma->vm_start,
970 vma->vm_end - vma->vm_start,
979 int pcibus_to_node(struct pci_bus *pbus)
981 struct pci_pbm_info *pbm = pbus->sysdata;
983 return pbm->numa_node;
985 EXPORT_SYMBOL(pcibus_to_node);
988 /* Return the domain number for this pci bus */
990 int pci_domain_nr(struct pci_bus *pbus)
992 struct pci_pbm_info *pbm = pbus->sysdata;
1003 EXPORT_SYMBOL(pci_domain_nr);
1005 #ifdef CONFIG_PCI_MSI
1006 int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
1008 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
1009 unsigned int virt_irq;
1011 if (!pbm->setup_msi_irq)
1014 return pbm->setup_msi_irq(&virt_irq, pdev, desc);
1017 void arch_teardown_msi_irq(unsigned int virt_irq)
1019 struct msi_desc *entry = get_irq_msi(virt_irq);
1020 struct pci_dev *pdev = entry->dev;
1021 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
1023 if (pbm->teardown_msi_irq)
1024 pbm->teardown_msi_irq(virt_irq, pdev);
1026 #endif /* !(CONFIG_PCI_MSI) */
1028 struct device_node *pci_device_to_OF_node(struct pci_dev *pdev)
1030 return pdev->dev.archdata.prom_node;
1032 EXPORT_SYMBOL(pci_device_to_OF_node);
1034 static void ali_sound_dma_hack(struct pci_dev *pdev, int set_bit)
1036 struct pci_dev *ali_isa_bridge;
1039 /* ALI sound chips generate 31-bits of DMA, a special register
1040 * determines what bit 31 is emitted as.
1042 ali_isa_bridge = pci_get_device(PCI_VENDOR_ID_AL,
1043 PCI_DEVICE_ID_AL_M1533,
1046 pci_read_config_byte(ali_isa_bridge, 0x7e, &val);
1051 pci_write_config_byte(ali_isa_bridge, 0x7e, val);
1052 pci_dev_put(ali_isa_bridge);
1055 int pci_dma_supported(struct pci_dev *pdev, u64 device_mask)
1060 dma_addr_mask = 0xffffffff;
1062 struct iommu *iommu = pdev->dev.archdata.iommu;
1064 dma_addr_mask = iommu->dma_addr_mask;
1066 if (pdev->vendor == PCI_VENDOR_ID_AL &&
1067 pdev->device == PCI_DEVICE_ID_AL_M5451 &&
1068 device_mask == 0x7fffffff) {
1069 ali_sound_dma_hack(pdev,
1070 (dma_addr_mask & 0x80000000) != 0);
1075 if (device_mask >= (1UL << 32UL))
1078 return (device_mask & dma_addr_mask) == dma_addr_mask;
1080 EXPORT_SYMBOL(pci_dma_supported);
1082 void pci_resource_to_user(const struct pci_dev *pdev, int bar,
1083 const struct resource *rp, resource_size_t *start,
1084 resource_size_t *end)
1086 struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
1087 unsigned long offset;
1089 if (rp->flags & IORESOURCE_IO)
1090 offset = pbm->io_space.start;
1092 offset = pbm->mem_space.start;
1094 *start = rp->start - offset;
1095 *end = rp->end - offset;