diff options
Diffstat (limited to 'arch/sparc64/kernel/pci.c')
| -rw-r--r-- | arch/sparc64/kernel/pci.c | 1095 |
1 files changed, 0 insertions, 1095 deletions
diff --git a/arch/sparc64/kernel/pci.c b/arch/sparc64/kernel/pci.c deleted file mode 100644 index bdb7c0a6d83d..000000000000 --- a/arch/sparc64/kernel/pci.c +++ /dev/null @@ -1,1095 +0,0 @@ -/* 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 <linux/module.h> -#include <linux/kernel.h> -#include <linux/string.h> -#include <linux/sched.h> -#include <linux/capability.h> -#include <linux/errno.h> -#include <linux/pci.h> -#include <linux/msi.h> -#include <linux/irq.h> -#include <linux/init.h> -#include <linux/of.h> -#include <linux/of_device.h> - -#include <asm/uaccess.h> -#include <asm/pgtable.h> -#include <asm/irq.h> -#include <asm/prom.h> -#include <asm/apb.h> - -#include "pci_impl.h" - -/* List of all PCI controllers found in the system. */ -struct pci_pbm_info *pci_pbm_root = NULL; - -/* Each PBM found gets a unique index. */ -int pci_num_pbms = 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); -} - -static int ofpci_verbose; - -static int __init ofpci_debug(char *str) -{ - int val = 0; - - get_option(&str, &val); - if (val) - ofpci_verbose = 1; - return 1; -} - -__setup("ofpci_debug=", ofpci_debug); - -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; - if (ofpci_verbose) - 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; - if (ofpci_verbose) - 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); - } -} - -static 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 of_device *op; - struct pci_dev *dev; - const char *type; - u32 class; - - dev = alloc_pci_dev(); - 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 = op = of_find_device_by_node(node); - sd->numa_node = pbm->numa_node; - - sd = &op->dev.archdata; - sd->iommu = pbm->iommu; - sd->stc = &pbm->stc; - sd->numa_node = pbm->numa_node; - - if (!strcmp(node->name, "ebus")) - of_propagate_archdata(op); - - type = of_get_property(node, "device_type", NULL); - if (type == NULL) - type = ""; - - if (ofpci_verbose) - 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); - - /* 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; - dev->revision = class & 0xff; - - dev_set_name(&dev->dev, "%04x:%02x:%02x.%d", pci_domain_nr(bus), - dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn)); - - if (ofpci_verbose) - printk(" class: 0x%x device name: %s\n", - dev->class, pci_name(dev)); - - /* I have seen IDE devices which will not respond to - * the bmdma simplex check reads if bus mastering is - * disabled. - */ - if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE) - pci_set_master(dev); - - dev->current_state = 4; /* unknown power state */ - dev->error_state = pci_channel_io_normal; - - if (!strcmp(node->name, "pci")) { - /* 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); - - if (ofpci_verbose) - printk(" adding to system ...\n"); - - pci_device_add(dev, bus); - - return dev; -} - -static void __devinit 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 pci_resource_adjust(struct resource *res, - struct resource *root) -{ - res->start += root->start; - res->end += root->start; -} - -/* For PCI bus devices which lack a 'ranges' property we interrogate - * the config space values to set the resources, just like the generic - * Linux PCI probing code does. - */ -static void __devinit pci_cfg_fake_ranges(struct pci_dev *dev, - struct pci_bus *bus, - struct pci_pbm_info *pbm) -{ - struct resource *res; - u8 io_base_lo, io_limit_lo; - u16 mem_base_lo, mem_limit_lo; - unsigned long base, limit; - - pci_read_config_byte(dev, PCI_IO_BASE, &io_base_lo); - pci_read_config_byte(dev, PCI_IO_LIMIT, &io_limit_lo); - base = (io_base_lo & PCI_IO_RANGE_MASK) << 8; - limit = (io_limit_lo & PCI_IO_RANGE_MASK) << 8; - - if ((io_base_lo & PCI_IO_RANGE_TYPE_MASK) == PCI_IO_RANGE_TYPE_32) { - u16 io_base_hi, io_limit_hi; - - pci_read_config_word(dev, PCI_IO_BASE_UPPER16, &io_base_hi); - pci_read_config_word(dev, PCI_IO_LIMIT_UPPER16, &io_limit_hi); - base |= (io_base_hi << 16); - limit |= (io_limit_hi << 16); - } - - res = bus->resource[0]; - if (base <= limit) { - res->flags = (io_base_lo & PCI_IO_RANGE_TYPE_MASK) | IORESOURCE_IO; - if (!res->start) - res->start = base; - if (!res->end) - res->end = limit + 0xfff; - pci_resource_adjust(res, &pbm->io_space); - } - - pci_read_config_word(dev, PCI_MEMORY_BASE, &mem_base_lo); - pci_read_config_word(dev, PCI_MEMORY_LIMIT, &mem_limit_lo); - base = (mem_base_lo & PCI_MEMORY_RANGE_MASK) << 16; - limit = (mem_limit_lo & PCI_MEMORY_RANGE_MASK) << 16; - - res = bus->resource[1]; - if (base <= limit) { - res->flags = ((mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) | - IORESOURCE_MEM); - res->start = base; - res->end = limit + 0xfffff; - pci_resource_adjust(res, &pbm->mem_space); - } - - pci_read_config_word(dev, PCI_PREF_MEMORY_BASE, &mem_base_lo); - pci_read_config_word(dev, PCI_PREF_MEMORY_LIMIT, &mem_limit_lo); - base = (mem_base_lo & PCI_PREF_RANGE_MASK) << 16; - limit = (mem_limit_lo & PCI_PREF_RANGE_MASK) << 16; - - if ((mem_base_lo & PCI_PREF_RANGE_TYPE_MASK) == PCI_PREF_RANGE_TYPE_64) { - u32 mem_base_hi, mem_limit_hi; - - pci_read_config_dword(dev, PCI_PREF_BASE_UPPER32, &mem_base_hi); - pci_read_config_dword(dev, PCI_PREF_LIMIT_UPPER32, &mem_limit_hi); - - /* - * Some bridges set the base > limit by default, and some - * (broken) BIOSes do not initialize them. If we find - * this, just assume they are not being used. - */ - if (mem_base_hi <= mem_limit_hi) { - base |= ((long) mem_base_hi) << 32; - limit |= ((long) mem_limit_hi) << 32; - } - } - - res = bus->resource[2]; - if (base <= limit) { - res->flags = ((mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) | - IORESOURCE_MEM | IORESOURCE_PREFETCH); - res->start = base; - res->end = limit + 0xfffff; - pci_resource_adjust(res, &pbm->mem_space); - } -} - -/* Cook up fake bus resources for SUNW,simba PCI bridges which lack - * a proper 'ranges' property. - */ -static void __devinit 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 __devinit 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]) - -static 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; - - if (ofpci_verbose) - 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) { - const char *model = of_get_property(node, "model", NULL); - if (model && !strcmp(model, "SUNW,simba")) - simba = 1; - } - - 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 after_ranges; - } else if (ranges == NULL) { - pci_cfg_fake_ranges(dev, bus, pbm); - goto after_ranges; - } - 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); - } -after_ranges: - sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus), - bus->number); - if (ofpci_verbose) - printk(" bus name: %s\n", bus->name); - - pci_of_scan_bus(pbm, node, bus); -} - -static void __devinit 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, prev_devfn; - struct pci_dev *dev; - - if (ofpci_verbose) - printk("PCI: scan_bus[%s] bus no %d\n", - node->full_name, bus->number); - - child = NULL; - prev_devfn = -1; - while ((child = of_get_next_child(node, child)) != NULL) { - if (ofpci_verbose) - printk(" * %s\n", child->full_name); - reg = of_get_property(child, "reg", ®len); - if (reg == NULL || reglen < 20) - continue; - - devfn = (reg[0] >> 8) & 0xff; - - /* This is a workaround for some device trees - * which list PCI devices twice. On the V100 - * for example, device number 3 is listed twice. - * Once as "pm" and once again as "lomp". - */ - if (devfn == prev_devfn) - continue; - prev_devfn = devfn; - - /* create a new pci_dev for this device */ - dev = of_create_pci_dev(pbm, child, bus, devfn); - if (!dev) - continue; - if (ofpci_verbose) - 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 * __devinit pci_scan_one_pbm(struct pci_pbm_info *pbm, - struct device *parent) -{ - struct device_node *node = pbm->op->node; - struct pci_bus *bus; - - printk("PCI: Scanning PBM %s\n", node->full_name); - - bus = pci_create_bus(parent, pbm->pci_first_busno, pbm->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; -} - -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<<i))) - continue; - - if (res->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; - unsigned long space_size, user_offset, user_size; - - 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 (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 *pdev, - struct vm_area_struct *vma, - enum pci_mmap_state mmap_state) -{ - unsigned long user_paddr, user_size; - int i, err; - - /* First compute the physical address in vma->vm_pgoff, - * making sure the user offset is within range in the - * appropriate PCI space. - */ - err = __pci_mmap_make_offset_bus(pdev, vma, mmap_state); - if (err) - return err; - - /* If this is a mapping on a host bridge, any address - * is OK. - */ - if ((pdev->class >> 8) == PCI_CLASS_BRIDGE_HOST) - return err; - - /* Otherwise make sure it's in the range for one of the - * device's resources. - */ - user_paddr = vma->vm_pgoff << PAGE_SHIFT; - user_size = vma->vm_end - vma->vm_start; - - for (i = 0; i <= PCI_ROM_RESOURCE; i++) { - struct resource *rp = &pdev->resource[i]; - resource_size_t aligned_end; - - /* 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; - } - - /* Align the resource end to the next page address. - * PAGE_SIZE intentionally added instead of (PAGE_SIZE - 1), - * because actually we need the address of the next byte - * after rp->end. - */ - aligned_end = (rp->end + PAGE_SIZE) & PAGE_MASK; - - if ((rp->start <= user_paddr) && - (user_paddr + user_size) <= aligned_end) - break; - } - - if (i > PCI_ROM_RESOURCE) - return -EINVAL; - - 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; -} - -#ifdef CONFIG_NUMA -int pcibus_to_node(struct pci_bus *pbus) -{ - struct pci_pbm_info *pbm = pbus->sysdata; - - return pbm->numa_node; -} -EXPORT_SYMBOL(pcibus_to_node); -#endif - -/* Return the domain number for this pci bus */ - -int pci_domain_nr(struct pci_bus *pbus) -{ - struct pci_pbm_info *pbm = pbus->sysdata; - int ret; - - if (!pbm) { - ret = -ENXIO; - } else { - ret = pbm->index; - } - - 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; - unsigned int virt_irq; - - if (!pbm->setup_msi_irq) - return -EINVAL; - - return pbm->setup_msi_irq(&virt_irq, pdev, desc); -} - -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; - - if (pbm->teardown_msi_irq) - pbm->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); - -static void ali_sound_dma_hack(struct pci_dev *pdev, int set_bit) -{ - struct pci_dev *ali_isa_bridge; - u8 val; - - /* ALI sound chips generate 31-bits of DMA, a special register - * determines what bit 31 is emitted as. - */ - ali_isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, - PCI_DEVICE_ID_AL_M1533, - NULL); - - pci_read_config_byte(ali_isa_bridge, 0x7e, &val); - if (set_bit) - val |= 0x01; - else - val &= ~0x01; - pci_write_config_byte(ali_isa_bridge, 0x7e, val); - pci_dev_put(ali_isa_bridge); -} - -int pci_dma_supported(struct pci_dev *pdev, u64 device_mask) -{ - u64 dma_addr_mask; - - if (pdev == NULL) { - dma_addr_mask = 0xffffffff; - } else { - struct iommu *iommu = pdev->dev.archdata.iommu; - - dma_addr_mask = iommu->dma_addr_mask; - - if (pdev->vendor == PCI_VENDOR_ID_AL && - pdev->device == PCI_DEVICE_ID_AL_M5451 && - device_mask == 0x7fffffff) { - ali_sound_dma_hack(pdev, - (dma_addr_mask & 0x80000000) != 0); - return 1; - } - } - - if (device_mask >= (1UL << 32UL)) - return 0; - - return (device_mask & dma_addr_mask) == dma_addr_mask; -} - -void pci_resource_to_user(const struct pci_dev *pdev, int bar, - const struct resource *rp, resource_size_t *start, - resource_size_t *end) -{ - struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller; - unsigned long offset; - - if (rp->flags & IORESOURCE_IO) - offset = pbm->io_space.start; - else - offset = pbm->mem_space.start; - - *start = rp->start - offset; - *end = rp->end - offset; -} |
