/* pci.c: UltraSparc PCI controller support. * * Copyright (C) 1997, 1998, 1999 David S. Miller (davem@redhat.com) * Copyright (C) 1998, 1999 Eddie C. Dost (ecd@skynet.be) * Copyright (C) 1999 Jakub Jelinek (jj@ultra.linux.cz) * * OF tree based PCI bus probing taken from the PowerPC port * with minor modifications, see there for credits. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "pci_impl.h" unsigned long pci_memspace_mask = 0xffffffffUL; #ifndef CONFIG_PCI /* A "nop" PCI implementation. */ asmlinkage int sys_pciconfig_read(unsigned long bus, unsigned long dfn, unsigned long off, unsigned long len, unsigned char *buf) { return 0; } asmlinkage int sys_pciconfig_write(unsigned long bus, unsigned long dfn, unsigned long off, unsigned long len, unsigned char *buf) { return 0; } #else /* List of all PCI controllers found in the system. */ struct pci_controller_info *pci_controller_root = NULL; /* Each PCI controller found gets a unique index. */ int pci_num_controllers = 0; volatile int pci_poke_in_progress; volatile int pci_poke_cpu = -1; volatile int pci_poke_faulted; static DEFINE_SPINLOCK(pci_poke_lock); void pci_config_read8(u8 *addr, u8 *ret) { unsigned long flags; u8 byte; spin_lock_irqsave(&pci_poke_lock, flags); pci_poke_cpu = smp_processor_id(); pci_poke_in_progress = 1; pci_poke_faulted = 0; __asm__ __volatile__("membar #Sync\n\t" "lduba [%1] %2, %0\n\t" "membar #Sync" : "=r" (byte) : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L) : "memory"); pci_poke_in_progress = 0; pci_poke_cpu = -1; if (!pci_poke_faulted) *ret = byte; spin_unlock_irqrestore(&pci_poke_lock, flags); } void pci_config_read16(u16 *addr, u16 *ret) { unsigned long flags; u16 word; spin_lock_irqsave(&pci_poke_lock, flags); pci_poke_cpu = smp_processor_id(); pci_poke_in_progress = 1; pci_poke_faulted = 0; __asm__ __volatile__("membar #Sync\n\t" "lduha [%1] %2, %0\n\t" "membar #Sync" : "=r" (word) : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L) : "memory"); pci_poke_in_progress = 0; pci_poke_cpu = -1; if (!pci_poke_faulted) *ret = word; spin_unlock_irqrestore(&pci_poke_lock, flags); } void pci_config_read32(u32 *addr, u32 *ret) { unsigned long flags; u32 dword; spin_lock_irqsave(&pci_poke_lock, flags); pci_poke_cpu = smp_processor_id(); pci_poke_in_progress = 1; pci_poke_faulted = 0; __asm__ __volatile__("membar #Sync\n\t" "lduwa [%1] %2, %0\n\t" "membar #Sync" : "=r" (dword) : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L) : "memory"); pci_poke_in_progress = 0; pci_poke_cpu = -1; if (!pci_poke_faulted) *ret = dword; spin_unlock_irqrestore(&pci_poke_lock, flags); } void pci_config_write8(u8 *addr, u8 val) { unsigned long flags; spin_lock_irqsave(&pci_poke_lock, flags); pci_poke_cpu = smp_processor_id(); pci_poke_in_progress = 1; pci_poke_faulted = 0; __asm__ __volatile__("membar #Sync\n\t" "stba %0, [%1] %2\n\t" "membar #Sync" : /* no outputs */ : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L) : "memory"); pci_poke_in_progress = 0; pci_poke_cpu = -1; spin_unlock_irqrestore(&pci_poke_lock, flags); } void pci_config_write16(u16 *addr, u16 val) { unsigned long flags; spin_lock_irqsave(&pci_poke_lock, flags); pci_poke_cpu = smp_processor_id(); pci_poke_in_progress = 1; pci_poke_faulted = 0; __asm__ __volatile__("membar #Sync\n\t" "stha %0, [%1] %2\n\t" "membar #Sync" : /* no outputs */ : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L) : "memory"); pci_poke_in_progress = 0; pci_poke_cpu = -1; spin_unlock_irqrestore(&pci_poke_lock, flags); } void pci_config_write32(u32 *addr, u32 val) { unsigned long flags; spin_lock_irqsave(&pci_poke_lock, flags); pci_poke_cpu = smp_processor_id(); pci_poke_in_progress = 1; pci_poke_faulted = 0; __asm__ __volatile__("membar #Sync\n\t" "stwa %0, [%1] %2\n\t" "membar #Sync" : /* no outputs */ : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L) : "memory"); pci_poke_in_progress = 0; pci_poke_cpu = -1; spin_unlock_irqrestore(&pci_poke_lock, flags); } /* Probe for all PCI controllers in the system. */ extern void sabre_init(struct device_node *, const char *); extern void psycho_init(struct device_node *, const char *); extern void schizo_init(struct device_node *, const char *); extern void schizo_plus_init(struct device_node *, const char *); extern void tomatillo_init(struct device_node *, const char *); extern void sun4v_pci_init(struct device_node *, const char *); static struct { char *model_name; void (*init)(struct device_node *, const char *); } pci_controller_table[] __initdata = { { "SUNW,sabre", sabre_init }, { "pci108e,a000", sabre_init }, { "pci108e,a001", sabre_init }, { "SUNW,psycho", psycho_init }, { "pci108e,8000", psycho_init }, { "SUNW,schizo", schizo_init }, { "pci108e,8001", schizo_init }, { "SUNW,schizo+", schizo_plus_init }, { "pci108e,8002", schizo_plus_init }, { "SUNW,tomatillo", tomatillo_init }, { "pci108e,a801", tomatillo_init }, { "SUNW,sun4v-pci", sun4v_pci_init }, }; #define PCI_NUM_CONTROLLER_TYPES (sizeof(pci_controller_table) / \ sizeof(pci_controller_table[0])) static int __init pci_controller_init(const char *model_name, int namelen, struct device_node *dp) { int i; for (i = 0; i < PCI_NUM_CONTROLLER_TYPES; i++) { if (!strncmp(model_name, pci_controller_table[i].model_name, namelen)) { pci_controller_table[i].init(dp, model_name); return 1; } } return 0; } static int __init pci_is_controller(const char *model_name, int namelen, struct device_node *dp) { int i; for (i = 0; i < PCI_NUM_CONTROLLER_TYPES; i++) { if (!strncmp(model_name, pci_controller_table[i].model_name, namelen)) { return 1; } } return 0; } static int __init pci_controller_scan(int (*handler)(const char *, int, struct device_node *)) { struct device_node *dp; int count = 0; for_each_node_by_name(dp, "pci") { struct property *prop; int len; prop = of_find_property(dp, "model", &len); if (!prop) prop = of_find_property(dp, "compatible", &len); if (prop) { const char *model = prop->value; int item_len = 0; /* Our value may be a multi-valued string in the * case of some compatible properties. For sanity, * only try the first one. */ while (model[item_len] && len) { len--; item_len++; } if (handler(model, item_len, dp)) count++; } } return count; } /* Is there some PCI controller in the system? */ int __init pcic_present(void) { return pci_controller_scan(pci_is_controller); } struct pci_iommu_ops *pci_iommu_ops; EXPORT_SYMBOL(pci_iommu_ops); extern struct pci_iommu_ops pci_sun4u_iommu_ops, pci_sun4v_iommu_ops; /* Find each controller in the system, attach and initialize * software state structure for each and link into the * pci_controller_root. Setup the controller enough such * that bus scanning can be done. */ static void __init pci_controller_probe(void) { if (tlb_type == hypervisor) pci_iommu_ops = &pci_sun4v_iommu_ops; else pci_iommu_ops = &pci_sun4u_iommu_ops; printk("PCI: Probing for controllers.\n"); pci_controller_scan(pci_controller_init); } static unsigned long pci_parse_of_flags(u32 addr0) { unsigned long flags = 0; if (addr0 & 0x02000000) { flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY; flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64; flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M; if (addr0 & 0x40000000) flags |= IORESOURCE_PREFETCH | PCI_BASE_ADDRESS_MEM_PREFETCH; } else if (addr0 & 0x01000000) flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO; return flags; } /* The of_device layer has translated all of the assigned-address properties * into physical address resources, we only have to figure out the register * mapping. */ static void pci_parse_of_addrs(struct of_device *op, struct device_node *node, struct pci_dev *dev) { struct resource *op_res; const u32 *addrs; int proplen; addrs = of_get_property(node, "assigned-addresses", &proplen); if (!addrs) return; printk(" parse addresses (%d bytes) @ %p\n", proplen, addrs); op_res = &op->resource[0]; for (; proplen >= 20; proplen -= 20, addrs += 5, op_res++) { struct resource *res; unsigned long flags; int i; flags = pci_parse_of_flags(addrs[0]); if (!flags) continue; i = addrs[0] & 0xff; printk(" start: %lx, end: %lx, i: %x\n", op_res->start, op_res->end, i); if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) { res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2]; } else if (i == dev->rom_base_reg) { res = &dev->resource[PCI_ROM_RESOURCE]; flags |= IORESOURCE_READONLY | IORESOURCE_CACHEABLE; } else { printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i); continue; } res->start = op_res->start; res->end = op_res->end; res->flags = flags; res->name = pci_name(dev); } } struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm, struct device_node *node, struct pci_bus *bus, int devfn) { struct dev_archdata *sd; struct pci_dev *dev; const char *type; u32 class; dev = kzalloc(sizeof(struct pci_dev), GFP_KERNEL); if (!dev) return NULL; sd = &dev->dev.archdata; sd->iommu = pbm->iommu; sd->stc = &pbm->stc; sd->host_controller = pbm; sd->prom_node = node; sd->op = of_find_device_by_node(node); sd->msi_num = 0xffffffff; type = of_get_property(node, "device_type", NULL); if (type == NULL) type = ""; printk(" create device, devfn: %x, type: %s\n", devfn, type); dev->bus = bus; dev->sysdata = node; dev->dev.parent = bus->bridge; dev->dev.bus = &pci_bus_type; dev->devfn = devfn; dev->multifunction = 0; /* maybe a lie? */ dev->vendor = of_getintprop_default(node, "vendor-id", 0xffff); dev->device = of_getintprop_default(node, "device-id", 0xffff); dev->subsystem_vendor = of_getintprop_default(node, "subsystem-vendor-id", 0); dev->subsystem_device = of_getintprop_default(node, "subsystem-id", 0); dev->cfg_size = pci_cfg_space_size(dev); sprintf(pci_name(dev), "%04x:%02x:%02x.%d", pci_domain_nr(bus), dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn)); /* dev->class = of_getintprop_default(node, "class-code", 0); */ /* We can't actually use the firmware value, we have to read what * is in the register right now. One reason is that in the case * of IDE interfaces the firmware can sample the value before the * the IDE interface is programmed into native mode. */ pci_read_config_dword(dev, PCI_CLASS_REVISION, &class); dev->class = class >> 8; printk(" class: 0x%x\n", dev->class); dev->current_state = 4; /* unknown power state */ dev->error_state = pci_channel_io_normal; if (!strcmp(type, "pci") || !strcmp(type, "pciex")) { /* a PCI-PCI bridge */ dev->hdr_type = PCI_HEADER_TYPE_BRIDGE; dev->rom_base_reg = PCI_ROM_ADDRESS1; } else if (!strcmp(type, "cardbus")) { dev->hdr_type = PCI_HEADER_TYPE_CARDBUS; } else { dev->hdr_type = PCI_HEADER_TYPE_NORMAL; dev->rom_base_reg = PCI_ROM_ADDRESS; dev->irq = sd->op->irqs[0]; if (dev->irq == 0xffffffff) dev->irq = PCI_IRQ_NONE; } pci_parse_of_addrs(sd->op, node, dev); printk(" adding to system ...\n"); pci_device_add(dev, bus); return dev; } static void __init apb_calc_first_last(u8 map, u32 *first_p, u32 *last_p) { u32 idx, first, last; first = 8; last = 0; for (idx = 0; idx < 8; idx++) { if ((map & (1 << idx)) != 0) { if (first > idx) first = idx; if (last < idx) last = idx; } } *first_p = first; *last_p = last; } static void __init pci_resource_adjust(struct resource *res, struct resource *root) { res->start += root->start; res->end += root->start; } /* Cook up fake bus resources for SUNW,simba PCI bridges which lack * a proper 'ranges' property. */ static void __init apb_fake_ranges(struct pci_dev *dev, struct pci_bus *bus, struct pci_pbm_info *pbm) { struct resource *res; u32 first, last; u8 map; pci_read_config_byte(dev, APB_IO_ADDRESS_MAP, &map); apb_calc_first_last(map, &first, &last); res = bus->resource[0]; res->start = (first << 21); res->end = (last << 21) + ((1 << 21) - 1); res->flags = IORESOURCE_IO; pci_resource_adjust(res, &pbm->io_space); pci_read_config_byte(dev, APB_MEM_ADDRESS_MAP, &map); apb_calc_first_last(map, &first, &last); res = bus->resource[1]; res->start = (first << 21); res->end = (last << 21) + ((1 << 21) - 1); res->flags = IORESOURCE_MEM; pci_resource_adjust(res, &pbm->mem_space); } static void __init pci_of_scan_bus(struct pci_pbm_info *pbm, struct device_node *node, struct pci_bus *bus); #define GET_64BIT(prop, i) ((((u64) (prop)[(i)]) << 32) | (prop)[(i)+1]) void __devinit of_scan_pci_bridge(struct pci_pbm_info *pbm, struct device_node *node, struct pci_dev *dev) { struct pci_bus *bus; const u32 *busrange, *ranges; int len, i, simba; struct resource *res; unsigned int flags; u64 size; printk("of_scan_pci_bridge(%s)\n", node->full_name); /* parse bus-range property */ busrange = of_get_property(node, "bus-range", &len); if (busrange == NULL || len != 8) { printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n", node->full_name); return; } ranges = of_get_property(node, "ranges", &len); simba = 0; if (ranges == NULL) { char *model = of_get_property(node, "model", NULL); if (model && !strcmp(model, "SUNW,simba")) { simba = 1; } else { printk(KERN_DEBUG "Can't get ranges for PCI-PCI bridge %s\n", node->full_name); return; } } bus = pci_add_new_bus(dev->bus, dev, busrange[0]); if (!bus) { printk(KERN_ERR "Failed to create pci bus for %s\n", node->full_name); return; } bus->primary = dev->bus->number; bus->subordinate = busrange[1]; bus->bridge_ctl = 0; /* parse ranges property, or cook one up by hand for Simba */ /* PCI #address-cells == 3 and #size-cells == 2 always */ res = &dev->resource[PCI_BRIDGE_RESOURCES]; for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) { res->flags = 0; bus->resource[i] = res; ++res; } if (simba) { apb_fake_ranges(dev, bus, pbm); goto simba_cont; } i = 1; for (; len >= 32; len -= 32, ranges += 8) { struct resource *root; flags = pci_parse_of_flags(ranges[0]); size = GET_64BIT(ranges, 6); if (flags == 0 || size == 0) continue; if (flags & IORESOURCE_IO) { res = bus->resource[0]; if (res->flags) { printk(KERN_ERR "PCI: ignoring extra I/O range" " for bridge %s\n", node->full_name); continue; } root = &pbm->io_space; } else { if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) { printk(KERN_ERR "PCI: too many memory ranges" " for bridge %s\n", node->full_name); continue; } res = bus->resource[i]; ++i; root = &pbm->mem_space; } res->start = GET_64BIT(ranges, 1); res->end = res->start + size - 1; res->flags = flags; /* Another way to implement this would be to add an of_device * layer routine that can calculate a resource for a given * range property value in a PCI device. */ pci_resource_adjust(res, root); } simba_cont: sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus), bus->number); printk(" bus name: %s\n", bus->name); pci_of_scan_bus(pbm, node, bus); } static void __init pci_of_scan_bus(struct pci_pbm_info *pbm, struct device_node *node, struct pci_bus *bus) { struct device_node *child; const u32 *reg; int reglen, devfn; struct pci_dev *dev; printk("PCI: scan_bus[%s] bus no %d\n", node->full_name, bus->number); child = NULL; while ((child = of_get_next_child(node, child)) != NULL) { printk(" * %s\n", child->full_name); reg = of_get_property(child, "reg", ®len); if (reg == NULL || reglen < 20) continue; devfn = (reg[0] >> 8) & 0xff; /* create a new pci_dev for this device */ dev = of_create_pci_dev(pbm, child, bus, devfn); if (!dev) continue; printk("PCI: dev header type: %x\n", dev->hdr_type); if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) of_scan_pci_bridge(pbm, child, dev); } } static ssize_t show_pciobppath_attr(struct device * dev, struct device_attribute * attr, char * buf) { struct pci_dev *pdev; struct device_node *dp; pdev = to_pci_dev(dev); dp = pdev->dev.archdata.prom_node; return snprintf (buf, PAGE_SIZE, "%s\n", dp->full_name); } static DEVICE_ATTR(obppath, S_IRUSR | S_IRGRP | S_IROTH, show_pciobppath_attr, NULL); static void __devinit pci_bus_register_of_sysfs(struct pci_bus *bus) { struct pci_dev *dev; struct pci_bus *child_bus; int err; list_for_each_entry(dev, &bus->devices, bus_list) { /* we don't really care if we can create this file or * not, but we need to assign the result of the call * or the world will fall under alien invasion and * everybody will be frozen on a spaceship ready to be * eaten on alpha centauri by some green and jelly * humanoid. */ err = sysfs_create_file(&dev->dev.kobj, &dev_attr_obppath.attr); } list_for_each_entry(child_bus, &bus->children, node) pci_bus_register_of_sysfs(child_bus); } struct pci_bus * __init pci_scan_one_pbm(struct pci_pbm_info *pbm) { struct pci_controller_info *p = pbm->parent; struct device_node *node = pbm->prom_node; struct pci_bus *bus; printk("PCI: Scanning PBM %s\n", node->full_name); /* XXX parent device? XXX */ bus = pci_create_bus(NULL, pbm->pci_first_busno, p->pci_ops, pbm); if (!bus) { printk(KERN_ERR "Failed to create bus for %s\n", node->full_name); return NULL; } bus->secondary = pbm->pci_first_busno; bus->subordinate = pbm->pci_last_busno; bus->resource[0] = &pbm->io_space; bus->resource[1] = &pbm->mem_space; pci_of_scan_bus(pbm, node, bus); pci_bus_add_devices(bus); pci_bus_register_of_sysfs(bus); return bus; } static void __init pci_scan_each_controller_bus(void) { struct pci_controller_info *p; for (p = pci_controller_root; p; p = p->next) p->scan_bus(p); } extern void power_init(void); static int __init pcibios_init(void) { pci_controller_probe(); if (pci_controller_root == NULL) return 0; pci_scan_each_controller_bus(); isa_init(); ebus_init(); power_init(); return 0; } subsys_initcall(pcibios_init); void __devinit pcibios_fixup_bus(struct pci_bus *pbus) { struct pci_pbm_info *pbm = pbus->sysdata; /* Generic PCI bus probing sets these to point at * &io{port,mem}_resouce which is wrong for us. */ pbus->resource[0] = &pbm->io_space; pbus->resource[1] = &pbm->mem_space; } struct resource *pcibios_select_root(struct pci_dev *pdev, struct resource *r) { struct pci_pbm_info *pbm = pdev->bus->sysdata; struct resource *root = NULL; if (r->flags & IORESOURCE_IO) root = &pbm->io_space; if (r->flags & IORESOURCE_MEM) root = &pbm->mem_space; return root; } void pcibios_update_irq(struct pci_dev *pdev, int irq) { } void pcibios_align_resource(void *data, struct resource *res, resource_size_t size, resource_size_t align) { } int pcibios_enable_device(struct pci_dev *dev, int mask) { u16 cmd, oldcmd; int i; pci_read_config_word(dev, PCI_COMMAND, &cmd); oldcmd = cmd; for (i = 0; i < PCI_NUM_RESOURCES; i++) { struct resource *res = &dev->resource[i]; /* Only set up the requested stuff */ if (!(mask & (1<flags & IORESOURCE_IO) cmd |= PCI_COMMAND_IO; if (res->flags & IORESOURCE_MEM) cmd |= PCI_COMMAND_MEMORY; } if (cmd != oldcmd) { printk(KERN_DEBUG "PCI: Enabling device: (%s), cmd %x\n", pci_name(dev), cmd); /* Enable the appropriate bits in the PCI command register. */ pci_write_config_word(dev, PCI_COMMAND, cmd); } return 0; } void pcibios_resource_to_bus(struct pci_dev *pdev, struct pci_bus_region *region, struct resource *res) { struct pci_pbm_info *pbm = pdev->bus->sysdata; struct resource zero_res, *root; zero_res.start = 0; zero_res.end = 0; zero_res.flags = res->flags; if (res->flags & IORESOURCE_IO) root = &pbm->io_space; else root = &pbm->mem_space; pci_resource_adjust(&zero_res, root); region->start = res->start - zero_res.start; region->end = res->end - zero_res.start; } EXPORT_SYMBOL(pcibios_resource_to_bus); void pcibios_bus_to_resource(struct pci_dev *pdev, struct resource *res, struct pci_bus_region *region) { struct pci_pbm_info *pbm = pdev->bus->sysdata; struct resource *root; res->start = region->start; res->end = region->end; if (res->flags & IORESOURCE_IO) root = &pbm->io_space; else root = &pbm->mem_space; pci_resource_adjust(res, root); } EXPORT_SYMBOL(pcibios_bus_to_resource); char * __devinit pcibios_setup(char *str) { return str; } /* Platform support for /proc/bus/pci/X/Y mmap()s. */ /* If the user uses a host-bridge as the PCI device, he may use * this to perform a raw mmap() of the I/O or MEM space behind * that controller. * * This can be useful for execution of x86 PCI bios initialization code * on a PCI card, like the xfree86 int10 stuff does. */ static int __pci_mmap_make_offset_bus(struct pci_dev *pdev, struct vm_area_struct *vma, enum pci_mmap_state mmap_state) { struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller; struct pci_controller_info *p; unsigned long space_size, user_offset, user_size; p = pbm->parent; if (p->pbms_same_domain) { unsigned long lowest, highest; lowest = ~0UL; highest = 0UL; if (mmap_state == pci_mmap_io) { if (p->pbm_A.io_space.flags) { lowest = p->pbm_A.io_space.start; highest = p->pbm_A.io_space.end + 1; } if (p->pbm_B.io_space.flags) { if (lowest > p->pbm_B.io_space.start) lowest = p->pbm_B.io_space.start; if (highest < p->pbm_B.io_space.end + 1) highest = p->pbm_B.io_space.end + 1; } space_size = highest - lowest; } else { if (p->pbm_A.mem_space.flags) { lowest = p->pbm_A.mem_space.start; highest = p->pbm_A.mem_space.end + 1; } if (p->pbm_B.mem_space.flags) { if (lowest > p->pbm_B.mem_space.start) lowest = p->pbm_B.mem_space.start; if (highest < p->pbm_B.mem_space.end + 1) highest = p->pbm_B.mem_space.end + 1; } space_size = highest - lowest; } } else { if (mmap_state == pci_mmap_io) { space_size = (pbm->io_space.end - pbm->io_space.start) + 1; } else { space_size = (pbm->mem_space.end - pbm->mem_space.start) + 1; } } /* Make sure the request is in range. */ user_offset = vma->vm_pgoff << PAGE_SHIFT; user_size = vma->vm_end - vma->vm_start; if (user_offset >= space_size || (user_offset + user_size) > space_size) return -EINVAL; if (p->pbms_same_domain) { unsigned long lowest = ~0UL; if (mmap_state == pci_mmap_io) { if (p->pbm_A.io_space.flags) lowest = p->pbm_A.io_space.start; if (p->pbm_B.io_space.flags && lowest > p->pbm_B.io_space.start) lowest = p->pbm_B.io_space.start; } else { if (p->pbm_A.mem_space.flags) lowest = p->pbm_A.mem_space.start; if (p->pbm_B.mem_space.flags && lowest > p->pbm_B.mem_space.start) lowest = p->pbm_B.mem_space.start; } vma->vm_pgoff = (lowest + user_offset) >> PAGE_SHIFT; } else { if (mmap_state == pci_mmap_io) { vma->vm_pgoff = (pbm->io_space.start + user_offset) >> PAGE_SHIFT; } else { vma->vm_pgoff = (pbm->mem_space.start + user_offset) >> PAGE_SHIFT; } } return 0; } /* Adjust vm_pgoff of VMA such that it is the physical page offset corresponding * to the 32-bit pci bus offset for DEV requested by the user. * * Basically, the user finds the base address for his device which he wishes * to mmap. They read the 32-bit value from the config space base register, * add whatever PAGE_SIZE multiple offset they wish, and feed this into the * offset parameter of mmap on /proc/bus/pci/XXX for that device. * * Returns negative error code on failure, zero on success. */ static int __pci_mmap_make_offset(struct pci_dev *dev, struct vm_area_struct *vma, enum pci_mmap_state mmap_state) { unsigned long user_offset = vma->vm_pgoff << PAGE_SHIFT; unsigned long user32 = user_offset & pci_memspace_mask; unsigned long largest_base, this_base, addr32; int i; if ((dev->class >> 8) == PCI_CLASS_BRIDGE_HOST) return __pci_mmap_make_offset_bus(dev, vma, mmap_state); /* Figure out which base address this is for. */ largest_base = 0UL; for (i = 0; i <= PCI_ROM_RESOURCE; i++) { struct resource *rp = &dev->resource[i]; /* Active? */ if (!rp->flags) continue; /* Same type? */ if (i == PCI_ROM_RESOURCE) { if (mmap_state != pci_mmap_mem) continue; } else { if ((mmap_state == pci_mmap_io && (rp->flags & IORESOURCE_IO) == 0) || (mmap_state == pci_mmap_mem && (rp->flags & IORESOURCE_MEM) == 0)) continue; } this_base = rp->start; addr32 = (this_base & PAGE_MASK) & pci_memspace_mask; if (mmap_state == pci_mmap_io) addr32 &= 0xffffff; if (addr32 <= user32 && this_base > largest_base) largest_base = this_base; } if (largest_base == 0UL) return -EINVAL; /* Now construct the final physical address. */ if (mmap_state == pci_mmap_io) vma->vm_pgoff = (((largest_base & ~0xffffffUL) | user32) >> PAGE_SHIFT); else vma->vm_pgoff = (((largest_base & ~(pci_memspace_mask)) | user32) >> PAGE_SHIFT); return 0; } /* Set vm_flags of VMA, as appropriate for this architecture, for a pci device * mapping. */ static void __pci_mmap_set_flags(struct pci_dev *dev, struct vm_area_struct *vma, enum pci_mmap_state mmap_state) { vma->vm_flags |= (VM_IO | VM_RESERVED); } /* Set vm_page_prot of VMA, as appropriate for this architecture, for a pci * device mapping. */ static void __pci_mmap_set_pgprot(struct pci_dev *dev, struct vm_area_struct *vma, enum pci_mmap_state mmap_state) { /* Our io_remap_pfn_range takes care of this, do nothing. */ } /* Perform the actual remap of the pages for a PCI device mapping, as appropriate * for this architecture. The region in the process to map is described by vm_start * and vm_end members of VMA, the base physical address is found in vm_pgoff. * The pci device structure is provided so that architectures may make mapping * decisions on a per-device or per-bus basis. * * Returns a negative error code on failure, zero on success. */ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, enum pci_mmap_state mmap_state, int write_combine) { int ret; ret = __pci_mmap_make_offset(dev, vma, mmap_state); if (ret < 0) return ret; __pci_mmap_set_flags(dev, vma, mmap_state); __pci_mmap_set_pgprot(dev, vma, mmap_state); vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); ret = io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, vma->vm_end - vma->vm_start, vma->vm_page_prot); if (ret) return ret; return 0; } /* Return the domain nuber for this pci bus */ int pci_domain_nr(struct pci_bus *pbus) { struct pci_pbm_info *pbm = pbus->sysdata; int ret; if (pbm == NULL || pbm->parent == NULL) { ret = -ENXIO; } else { struct pci_controller_info *p = pbm->parent; ret = p->index; if (p->pbms_same_domain == 0) ret = ((ret << 1) + ((pbm == &pbm->parent->pbm_B) ? 1 : 0)); } return ret; } EXPORT_SYMBOL(pci_domain_nr); #ifdef CONFIG_PCI_MSI int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc) { struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller; struct pci_controller_info *p = pbm->parent; int virt_irq, err; if (!pbm->msi_num || !p->setup_msi_irq) return -EINVAL; err = p->setup_msi_irq(&virt_irq, pdev, desc); if (err < 0) return err; return virt_irq; } void arch_teardown_msi_irq(unsigned int virt_irq) { struct msi_desc *entry = get_irq_msi(virt_irq); struct pci_dev *pdev = entry->dev; struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller; struct pci_controller_info *p = pbm->parent; if (!pbm->msi_num || !p->setup_msi_irq) return; return p->teardown_msi_irq(virt_irq, pdev); } #endif /* !(CONFIG_PCI_MSI) */ struct device_node *pci_device_to_OF_node(struct pci_dev *pdev) { return pdev->dev.archdata.prom_node; } EXPORT_SYMBOL(pci_device_to_OF_node); #endif /* !(CONFIG_PCI) */