diff options
Diffstat (limited to 'arch/ppc64/kernel/pci.c')
| -rw-r--r-- | arch/ppc64/kernel/pci.c | 1319 |
1 files changed, 0 insertions, 1319 deletions
diff --git a/arch/ppc64/kernel/pci.c b/arch/ppc64/kernel/pci.c deleted file mode 100644 index 3cef1b8..0000000 --- a/arch/ppc64/kernel/pci.c +++ /dev/null @@ -1,1319 +0,0 @@ -/* - * Port for PPC64 David Engebretsen, IBM Corp. - * Contains common pci routines for ppc64 platform, pSeries and iSeries brands. - * - * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM - * Rework, based on alpha PCI code. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - */ - -#undef DEBUG - -#include <linux/config.h> -#include <linux/kernel.h> -#include <linux/pci.h> -#include <linux/string.h> -#include <linux/init.h> -#include <linux/bootmem.h> -#include <linux/mm.h> -#include <linux/list.h> -#include <linux/syscalls.h> - -#include <asm/processor.h> -#include <asm/io.h> -#include <asm/prom.h> -#include <asm/pci-bridge.h> -#include <asm/byteorder.h> -#include <asm/irq.h> -#include <asm/machdep.h> -#include <asm/udbg.h> -#include <asm/ppc-pci.h> - -#ifdef DEBUG -#define DBG(fmt...) udbg_printf(fmt) -#else -#define DBG(fmt...) -#endif - -unsigned long pci_probe_only = 1; -unsigned long pci_assign_all_buses = 0; - -/* - * legal IO pages under MAX_ISA_PORT. This is to ensure we don't touch - * devices we don't have access to. - */ -unsigned long io_page_mask; - -EXPORT_SYMBOL(io_page_mask); - -#ifdef CONFIG_PPC_MULTIPLATFORM -static void fixup_resource(struct resource *res, struct pci_dev *dev); -static void do_bus_setup(struct pci_bus *bus); -#endif - -unsigned int pcibios_assign_all_busses(void) -{ - return pci_assign_all_buses; -} - -/* pci_io_base -- the base address from which io bars are offsets. - * This is the lowest I/O base address (so bar values are always positive), - * and it *must* be the start of ISA space if an ISA bus exists because - * ISA drivers use hard coded offsets. If no ISA bus exists a dummy - * page is mapped and isa_io_limit prevents access to it. - */ -unsigned long isa_io_base; /* NULL if no ISA bus */ -EXPORT_SYMBOL(isa_io_base); -unsigned long pci_io_base; -EXPORT_SYMBOL(pci_io_base); - -void iSeries_pcibios_init(void); - -LIST_HEAD(hose_list); - -struct dma_mapping_ops pci_dma_ops; -EXPORT_SYMBOL(pci_dma_ops); - -int global_phb_number; /* Global phb counter */ - -/* Cached ISA bridge dev. */ -struct pci_dev *ppc64_isabridge_dev = NULL; - -static void fixup_broken_pcnet32(struct pci_dev* dev) -{ - if ((dev->class>>8 == PCI_CLASS_NETWORK_ETHERNET)) { - dev->vendor = PCI_VENDOR_ID_AMD; - pci_write_config_word(dev, PCI_VENDOR_ID, PCI_VENDOR_ID_AMD); - } -} -DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TRIDENT, PCI_ANY_ID, fixup_broken_pcnet32); - -void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region, - struct resource *res) -{ - unsigned long offset = 0; - struct pci_controller *hose = pci_bus_to_host(dev->bus); - - if (!hose) - return; - - if (res->flags & IORESOURCE_IO) - offset = (unsigned long)hose->io_base_virt - pci_io_base; - - if (res->flags & IORESOURCE_MEM) - offset = hose->pci_mem_offset; - - region->start = res->start - offset; - region->end = res->end - offset; -} - -void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res, - struct pci_bus_region *region) -{ - unsigned long offset = 0; - struct pci_controller *hose = pci_bus_to_host(dev->bus); - - if (!hose) - return; - - if (res->flags & IORESOURCE_IO) - offset = (unsigned long)hose->io_base_virt - pci_io_base; - - if (res->flags & IORESOURCE_MEM) - offset = hose->pci_mem_offset; - - res->start = region->start + offset; - res->end = region->end + offset; -} - -#ifdef CONFIG_HOTPLUG -EXPORT_SYMBOL(pcibios_resource_to_bus); -EXPORT_SYMBOL(pcibios_bus_to_resource); -#endif - -/* - * We need to avoid collisions with `mirrored' VGA ports - * and other strange ISA hardware, so we always want the - * addresses to be allocated in the 0x000-0x0ff region - * modulo 0x400. - * - * Why? Because some silly external IO cards only decode - * the low 10 bits of the IO address. The 0x00-0xff region - * is reserved for motherboard devices that decode all 16 - * bits, so it's ok to allocate at, say, 0x2800-0x28ff, - * but we want to try to avoid allocating at 0x2900-0x2bff - * which might have be mirrored at 0x0100-0x03ff.. - */ -void pcibios_align_resource(void *data, struct resource *res, - unsigned long size, unsigned long align) -{ - struct pci_dev *dev = data; - struct pci_controller *hose = pci_bus_to_host(dev->bus); - unsigned long start = res->start; - unsigned long alignto; - - if (res->flags & IORESOURCE_IO) { - unsigned long offset = (unsigned long)hose->io_base_virt - - pci_io_base; - /* Make sure we start at our min on all hoses */ - if (start - offset < PCIBIOS_MIN_IO) - start = PCIBIOS_MIN_IO + offset; - - /* - * Put everything into 0x00-0xff region modulo 0x400 - */ - if (start & 0x300) - start = (start + 0x3ff) & ~0x3ff; - - } else if (res->flags & IORESOURCE_MEM) { - /* Make sure we start at our min on all hoses */ - if (start - hose->pci_mem_offset < PCIBIOS_MIN_MEM) - start = PCIBIOS_MIN_MEM + hose->pci_mem_offset; - - /* Align to multiple of size of minimum base. */ - alignto = max(0x1000UL, align); - start = ALIGN(start, alignto); - } - - res->start = start; -} - -static DEFINE_SPINLOCK(hose_spinlock); - -/* - * pci_controller(phb) initialized common variables. - */ -void __devinit pci_setup_pci_controller(struct pci_controller *hose) -{ - memset(hose, 0, sizeof(struct pci_controller)); - - spin_lock(&hose_spinlock); - hose->global_number = global_phb_number++; - list_add_tail(&hose->list_node, &hose_list); - spin_unlock(&hose_spinlock); -} - -static void __init pcibios_claim_one_bus(struct pci_bus *b) -{ - struct pci_dev *dev; - struct pci_bus *child_bus; - - list_for_each_entry(dev, &b->devices, bus_list) { - int i; - - for (i = 0; i < PCI_NUM_RESOURCES; i++) { - struct resource *r = &dev->resource[i]; - - if (r->parent || !r->start || !r->flags) - continue; - pci_claim_resource(dev, i); - } - } - - list_for_each_entry(child_bus, &b->children, node) - pcibios_claim_one_bus(child_bus); -} - -#ifndef CONFIG_PPC_ISERIES -static void __init pcibios_claim_of_setup(void) -{ - struct pci_bus *b; - - list_for_each_entry(b, &pci_root_buses, node) - pcibios_claim_one_bus(b); -} -#endif - -#ifdef CONFIG_PPC_MULTIPLATFORM -static u32 get_int_prop(struct device_node *np, const char *name, u32 def) -{ - u32 *prop; - int len; - - prop = (u32 *) get_property(np, name, &len); - if (prop && len >= 4) - return *prop; - return def; -} - -static unsigned int pci_parse_of_flags(u32 addr0) -{ - unsigned int 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; -} - -#define GET_64BIT(prop, i) ((((u64) (prop)[(i)]) << 32) | (prop)[(i)+1]) - -static void pci_parse_of_addrs(struct device_node *node, struct pci_dev *dev) -{ - u64 base, size; - unsigned int flags; - struct resource *res; - u32 *addrs, i; - int proplen; - - addrs = (u32 *) get_property(node, "assigned-addresses", &proplen); - if (!addrs) - return; - for (; proplen >= 20; proplen -= 20, addrs += 5) { - flags = pci_parse_of_flags(addrs[0]); - if (!flags) - continue; - base = GET_64BIT(addrs, 1); - size = GET_64BIT(addrs, 3); - if (!size) - continue; - i = addrs[0] & 0xff; - 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 = base; - res->end = base + size - 1; - res->flags = flags; - res->name = pci_name(dev); - fixup_resource(res, dev); - } -} - -struct pci_dev *of_create_pci_dev(struct device_node *node, - struct pci_bus *bus, int devfn) -{ - struct pci_dev *dev; - const char *type; - - dev = kmalloc(sizeof(struct pci_dev), GFP_KERNEL); - if (!dev) - return NULL; - type = get_property(node, "device_type", NULL); - if (type == NULL) - type = ""; - - memset(dev, 0, sizeof(struct pci_dev)); - 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 = get_int_prop(node, "vendor-id", 0xffff); - dev->device = get_int_prop(node, "device-id", 0xffff); - dev->subsystem_vendor = get_int_prop(node, "subsystem-vendor-id", 0); - dev->subsystem_device = get_int_prop(node, "subsystem-id", 0); - - dev->cfg_size = 256; /*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 = get_int_prop(node, "class-code", 0); - - dev->current_state = 4; /* unknown power state */ - - if (!strcmp(type, "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 = NO_IRQ; - if (node->n_intrs > 0) { - dev->irq = node->intrs[0].line; - pci_write_config_byte(dev, PCI_INTERRUPT_LINE, - dev->irq); - } - } - - pci_parse_of_addrs(node, dev); - - pci_device_add(dev, bus); - - /* XXX pci_scan_msi_device(dev); */ - - return dev; -} -EXPORT_SYMBOL(of_create_pci_dev); - -void __devinit of_scan_bus(struct device_node *node, - struct pci_bus *bus) -{ - struct device_node *child = NULL; - u32 *reg; - int reglen, devfn; - struct pci_dev *dev; - - while ((child = of_get_next_child(node, child)) != NULL) { - reg = (u32 *) 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(child, bus, devfn); - if (!dev) - continue; - if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || - dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) - of_scan_pci_bridge(child, dev); - } - - do_bus_setup(bus); -} -EXPORT_SYMBOL(of_scan_bus); - -void __devinit of_scan_pci_bridge(struct device_node *node, - struct pci_dev *dev) -{ - struct pci_bus *bus; - u32 *busrange, *ranges; - int len, i, mode; - struct resource *res; - unsigned int flags; - u64 size; - - /* parse bus-range property */ - busrange = (u32 *) get_property(node, "bus-range", &len); - if (busrange == NULL || len != 8) { - printk(KERN_ERR "Can't get bus-range for PCI-PCI bridge %s\n", - node->full_name); - return; - } - ranges = (u32 *) get_property(node, "ranges", &len); - if (ranges == NULL) { - printk(KERN_ERR "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; - bus->sysdata = node; - - /* parse ranges property */ - /* 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; - } - i = 1; - for (; len >= 32; len -= 32, ranges += 8) { - 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; - } - } 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; - } - res->start = GET_64BIT(ranges, 1); - res->end = res->start + size - 1; - res->flags = flags; - fixup_resource(res, dev); - } - sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus), - bus->number); - - mode = PCI_PROBE_NORMAL; - if (ppc_md.pci_probe_mode) - mode = ppc_md.pci_probe_mode(bus); - if (mode == PCI_PROBE_DEVTREE) - of_scan_bus(node, bus); - else if (mode == PCI_PROBE_NORMAL) - pci_scan_child_bus(bus); -} -EXPORT_SYMBOL(of_scan_pci_bridge); -#endif /* CONFIG_PPC_MULTIPLATFORM */ - -void __devinit scan_phb(struct pci_controller *hose) -{ - struct pci_bus *bus; - struct device_node *node = hose->arch_data; - int i, mode; - struct resource *res; - - bus = pci_create_bus(NULL, hose->first_busno, hose->ops, node); - if (bus == NULL) { - printk(KERN_ERR "Failed to create bus for PCI domain %04x\n", - hose->global_number); - return; - } - bus->secondary = hose->first_busno; - hose->bus = bus; - - bus->resource[0] = res = &hose->io_resource; - if (res->flags && request_resource(&ioport_resource, res)) - printk(KERN_ERR "Failed to request PCI IO region " - "on PCI domain %04x\n", hose->global_number); - - for (i = 0; i < 3; ++i) { - res = &hose->mem_resources[i]; - bus->resource[i+1] = res; - if (res->flags && request_resource(&iomem_resource, res)) - printk(KERN_ERR "Failed to request PCI memory region " - "on PCI domain %04x\n", hose->global_number); - } - - mode = PCI_PROBE_NORMAL; -#ifdef CONFIG_PPC_MULTIPLATFORM - if (ppc_md.pci_probe_mode) - mode = ppc_md.pci_probe_mode(bus); - if (mode == PCI_PROBE_DEVTREE) { - bus->subordinate = hose->last_busno; - of_scan_bus(node, bus); - } -#endif /* CONFIG_PPC_MULTIPLATFORM */ - if (mode == PCI_PROBE_NORMAL) - hose->last_busno = bus->subordinate = pci_scan_child_bus(bus); - pci_bus_add_devices(bus); -} - -static int __init pcibios_init(void) -{ - struct pci_controller *hose, *tmp; - - /* For now, override phys_mem_access_prot. If we need it, - * later, we may move that initialization to each ppc_md - */ - ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot; - -#ifdef CONFIG_PPC_ISERIES - iSeries_pcibios_init(); -#endif - - printk("PCI: Probing PCI hardware\n"); - - /* Scan all of the recorded PCI controllers. */ - list_for_each_entry_safe(hose, tmp, &hose_list, list_node) - scan_phb(hose); - -#ifndef CONFIG_PPC_ISERIES - if (pci_probe_only) - pcibios_claim_of_setup(); - else - /* FIXME: `else' will be removed when - pci_assign_unassigned_resources() is able to work - correctly with [partially] allocated PCI tree. */ - pci_assign_unassigned_resources(); -#endif /* !CONFIG_PPC_ISERIES */ - - /* Call machine dependent final fixup */ - if (ppc_md.pcibios_fixup) - ppc_md.pcibios_fixup(); - - /* Cache the location of the ISA bridge (if we have one) */ - ppc64_isabridge_dev = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL); - if (ppc64_isabridge_dev != NULL) - printk("ISA bridge at %s\n", pci_name(ppc64_isabridge_dev)); - -#ifdef CONFIG_PPC_MULTIPLATFORM - /* map in PCI I/O space */ - phbs_remap_io(); -#endif - - printk("PCI: Probing PCI hardware done\n"); - - return 0; -} - -subsys_initcall(pcibios_init); - -char __init *pcibios_setup(char *str) -{ - return str; -} - -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; -} - -/* - * Return the domain number for this bus. - */ -int pci_domain_nr(struct pci_bus *bus) -{ -#ifdef CONFIG_PPC_ISERIES - return 0; -#else - struct pci_controller *hose = pci_bus_to_host(bus); - - return hose->global_number; -#endif -} - -EXPORT_SYMBOL(pci_domain_nr); - -/* Decide whether to display the domain number in /proc */ -int pci_proc_domain(struct pci_bus *bus) -{ -#ifdef CONFIG_PPC_ISERIES - return 0; -#else - struct pci_controller *hose = pci_bus_to_host(bus); - return hose->buid; -#endif -} - -/* - * Platform support for /proc/bus/pci/X/Y mmap()s, - * modelled on the sparc64 implementation by Dave Miller. - * -- paulus. - */ - -/* - * 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 struct resource *__pci_mmap_make_offset(struct pci_dev *dev, - unsigned long *offset, - enum pci_mmap_state mmap_state) -{ - struct pci_controller *hose = pci_bus_to_host(dev->bus); - unsigned long io_offset = 0; - int i, res_bit; - - if (hose == 0) - return NULL; /* should never happen */ - - /* If memory, add on the PCI bridge address offset */ - if (mmap_state == pci_mmap_mem) { - *offset += hose->pci_mem_offset; - res_bit = IORESOURCE_MEM; - } else { - io_offset = (unsigned long)hose->io_base_virt - pci_io_base; - *offset += io_offset; - res_bit = IORESOURCE_IO; - } - - /* - * Check that the offset requested corresponds to one of the - * resources of the device. - */ - for (i = 0; i <= PCI_ROM_RESOURCE; i++) { - struct resource *rp = &dev->resource[i]; - int flags = rp->flags; - - /* treat ROM as memory (should be already) */ - if (i == PCI_ROM_RESOURCE) - flags |= IORESOURCE_MEM; - - /* Active and same type? */ - if ((flags & res_bit) == 0) - continue; - - /* In the range of this resource? */ - if (*offset < (rp->start & PAGE_MASK) || *offset > rp->end) - continue; - - /* found it! construct the final physical address */ - if (mmap_state == pci_mmap_io) - *offset += hose->io_base_phys - io_offset; - return rp; - } - - return NULL; -} - -/* - * Set vm_page_prot of VMA, as appropriate for this architecture, for a pci - * device mapping. - */ -static pgprot_t __pci_mmap_set_pgprot(struct pci_dev *dev, struct resource *rp, - pgprot_t protection, - enum pci_mmap_state mmap_state, - int write_combine) -{ - unsigned long prot = pgprot_val(protection); - - /* Write combine is always 0 on non-memory space mappings. On - * memory space, if the user didn't pass 1, we check for a - * "prefetchable" resource. This is a bit hackish, but we use - * this to workaround the inability of /sysfs to provide a write - * combine bit - */ - if (mmap_state != pci_mmap_mem) - write_combine = 0; - else if (write_combine == 0) { - if (rp->flags & IORESOURCE_PREFETCH) - write_combine = 1; - } - - /* XXX would be nice to have a way to ask for write-through */ - prot |= _PAGE_NO_CACHE; - if (write_combine) - prot &= ~_PAGE_GUARDED; - else - prot |= _PAGE_GUARDED; - - printk("PCI map for %s:%lx, prot: %lx\n", pci_name(dev), rp->start, - prot); - - return __pgprot(prot); -} - -/* - * This one is used by /dev/mem and fbdev who have no clue about the - * PCI device, it tries to find the PCI device first and calls the - * above routine - */ -pgprot_t pci_phys_mem_access_prot(struct file *file, - unsigned long pfn, - unsigned long size, - pgprot_t protection) -{ - struct pci_dev *pdev = NULL; - struct resource *found = NULL; - unsigned long prot = pgprot_val(protection); - unsigned long offset = pfn << PAGE_SHIFT; - int i; - - if (page_is_ram(pfn)) - return __pgprot(prot); - - prot |= _PAGE_NO_CACHE | _PAGE_GUARDED; - - for_each_pci_dev(pdev) { - for (i = 0; i <= PCI_ROM_RESOURCE; i++) { - struct resource *rp = &pdev->resource[i]; - int flags = rp->flags; - - /* Active and same type? */ - if ((flags & IORESOURCE_MEM) == 0) - continue; - /* In the range of this resource? */ - if (offset < (rp->start & PAGE_MASK) || - offset > rp->end) - continue; - found = rp; - break; - } - if (found) - break; - } - if (found) { - if (found->flags & IORESOURCE_PREFETCH) - prot &= ~_PAGE_GUARDED; - pci_dev_put(pdev); - } - - DBG("non-PCI map for %lx, prot: %lx\n", offset, prot); - - return __pgprot(prot); -} - - -/* - * 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) -{ - unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; - struct resource *rp; - int ret; - - rp = __pci_mmap_make_offset(dev, &offset, mmap_state); - if (rp == NULL) - return -EINVAL; - - vma->vm_pgoff = offset >> PAGE_SHIFT; - vma->vm_flags |= VM_SHM | VM_LOCKED | VM_IO; - vma->vm_page_prot = __pci_mmap_set_pgprot(dev, rp, - vma->vm_page_prot, - mmap_state, write_combine); - - ret = remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, - vma->vm_end - vma->vm_start, vma->vm_page_prot); - - return ret; -} - -#ifdef CONFIG_PPC_MULTIPLATFORM -static ssize_t pci_show_devspec(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct pci_dev *pdev; - struct device_node *np; - - pdev = to_pci_dev (dev); - np = pci_device_to_OF_node(pdev); - if (np == NULL || np->full_name == NULL) - return 0; - return sprintf(buf, "%s", np->full_name); -} -static DEVICE_ATTR(devspec, S_IRUGO, pci_show_devspec, NULL); -#endif /* CONFIG_PPC_MULTIPLATFORM */ - -void pcibios_add_platform_entries(struct pci_dev *pdev) -{ -#ifdef CONFIG_PPC_MULTIPLATFORM - device_create_file(&pdev->dev, &dev_attr_devspec); -#endif /* CONFIG_PPC_MULTIPLATFORM */ -} - -#ifdef CONFIG_PPC_MULTIPLATFORM - -#define ISA_SPACE_MASK 0x1 -#define ISA_SPACE_IO 0x1 - -static void __devinit pci_process_ISA_OF_ranges(struct device_node *isa_node, - unsigned long phb_io_base_phys, - void __iomem * phb_io_base_virt) -{ - struct isa_range *range; - unsigned long pci_addr; - unsigned int isa_addr; - unsigned int size; - int rlen = 0; - - range = (struct isa_range *) get_property(isa_node, "ranges", &rlen); - if (range == NULL || (rlen < sizeof(struct isa_range))) { - printk(KERN_ERR "no ISA ranges or unexpected isa range size," - "mapping 64k\n"); - __ioremap_explicit(phb_io_base_phys, - (unsigned long)phb_io_base_virt, - 0x10000, _PAGE_NO_CACHE | _PAGE_GUARDED); - return; - } - - /* From "ISA Binding to 1275" - * The ranges property is laid out as an array of elements, - * each of which comprises: - * cells 0 - 1: an ISA address - * cells 2 - 4: a PCI address - * (size depending on dev->n_addr_cells) - * cell 5: the size of the range - */ - if ((range->isa_addr.a_hi && ISA_SPACE_MASK) == ISA_SPACE_IO) { - isa_addr = range->isa_addr.a_lo; - pci_addr = (unsigned long) range->pci_addr.a_mid << 32 | - range->pci_addr.a_lo; - - /* Assume these are both zero */ - if ((pci_addr != 0) || (isa_addr != 0)) { - printk(KERN_ERR "unexpected isa to pci mapping: %s\n", - __FUNCTION__); - return; - } - - size = PAGE_ALIGN(range->size); - - __ioremap_explicit(phb_io_base_phys, - (unsigned long) phb_io_base_virt, - size, _PAGE_NO_CACHE | _PAGE_GUARDED); - } -} - -void __devinit pci_process_bridge_OF_ranges(struct pci_controller *hose, - struct device_node *dev, int prim) -{ - unsigned int *ranges, pci_space; - unsigned long size; - int rlen = 0; - int memno = 0; - struct resource *res; - int np, na = prom_n_addr_cells(dev); - unsigned long pci_addr, cpu_phys_addr; - - np = na + 5; - - /* From "PCI Binding to 1275" - * The ranges property is laid out as an array of elements, - * each of which comprises: - * cells 0 - 2: a PCI address - * cells 3 or 3+4: a CPU physical address - * (size depending on dev->n_addr_cells) - * cells 4+5 or 5+6: the size of the range - */ - rlen = 0; - hose->io_base_phys = 0; - ranges = (unsigned int *) get_property(dev, "ranges", &rlen); - while ((rlen -= np * sizeof(unsigned int)) >= 0) { - res = NULL; - pci_space = ranges[0]; - pci_addr = ((unsigned long)ranges[1] << 32) | ranges[2]; - - cpu_phys_addr = ranges[3]; - if (na >= 2) - cpu_phys_addr = (cpu_phys_addr << 32) | ranges[4]; - - size = ((unsigned long)ranges[na+3] << 32) | ranges[na+4]; - ranges += np; - if (size == 0) - continue; - - /* Now consume following elements while they are contiguous */ - while (rlen >= np * sizeof(unsigned int)) { - unsigned long addr, phys; - - if (ranges[0] != pci_space) - break; - addr = ((unsigned long)ranges[1] << 32) | ranges[2]; - phys = ranges[3]; - if (na >= 2) - phys = (phys << 32) | ranges[4]; - if (addr != pci_addr + size || - phys != cpu_phys_addr + size) - break; - - size += ((unsigned long)ranges[na+3] << 32) - | ranges[na+4]; - ranges += np; - rlen -= np * sizeof(unsigned int); - } - - switch ((pci_space >> 24) & 0x3) { - case 1: /* I/O space */ - hose->io_base_phys = cpu_phys_addr; - hose->pci_io_size = size; - - res = &hose->io_resource; - res->flags = IORESOURCE_IO; - res->start = pci_addr; - DBG("phb%d: IO 0x%lx -> 0x%lx\n", hose->global_number, - res->start, res->start + size - 1); - break; - case 2: /* memory space */ - memno = 0; - while (memno < 3 && hose->mem_resources[memno].flags) - ++memno; - - if (memno == 0) - hose->pci_mem_offset = cpu_phys_addr - pci_addr; - if (memno < 3) { - res = &hose->mem_resources[memno]; - res->flags = IORESOURCE_MEM; - res->start = cpu_phys_addr; - DBG("phb%d: MEM 0x%lx -> 0x%lx\n", hose->global_number, - res->start, res->start + size - 1); - } - break; - } - if (res != NULL) { - res->name = dev->full_name; - res->end = res->start + size - 1; - res->parent = NULL; - res->sibling = NULL; - res->child = NULL; - } - } -} - -void __init pci_setup_phb_io(struct pci_controller *hose, int primary) -{ - unsigned long size = hose->pci_io_size; - unsigned long io_virt_offset; - struct resource *res; - struct device_node *isa_dn; - - hose->io_base_virt = reserve_phb_iospace(size); - DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n", - hose->global_number, hose->io_base_phys, - (unsigned long) hose->io_base_virt); - - if (primary) { - pci_io_base = (unsigned long)hose->io_base_virt; - isa_dn = of_find_node_by_type(NULL, "isa"); - if (isa_dn) { - isa_io_base = pci_io_base; - pci_process_ISA_OF_ranges(isa_dn, hose->io_base_phys, - hose->io_base_virt); - of_node_put(isa_dn); - /* Allow all IO */ - io_page_mask = -1; - } - } - - io_virt_offset = (unsigned long)hose->io_base_virt - pci_io_base; - res = &hose->io_resource; - res->start += io_virt_offset; - res->end += io_virt_offset; -} - -void __devinit pci_setup_phb_io_dynamic(struct pci_controller *hose, - int primary) -{ - unsigned long size = hose->pci_io_size; - unsigned long io_virt_offset; - struct resource *res; - - hose->io_base_virt = __ioremap(hose->io_base_phys, size, - _PAGE_NO_CACHE | _PAGE_GUARDED); - DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n", - hose->global_number, hose->io_base_phys, - (unsigned long) hose->io_base_virt); - - if (primary) - pci_io_base = (unsigned long)hose->io_base_virt; - - io_virt_offset = (unsigned long)hose->io_base_virt - pci_io_base; - res = &hose->io_resource; - res->start += io_virt_offset; - res->end += io_virt_offset; -} - - -static int get_bus_io_range(struct pci_bus *bus, unsigned long *start_phys, - unsigned long *start_virt, unsigned long *size) -{ - struct pci_controller *hose = pci_bus_to_host(bus); - struct pci_bus_region region; - struct resource *res; - - if (bus->self) { - res = bus->resource[0]; - pcibios_resource_to_bus(bus->self, ®ion, res); - *start_phys = hose->io_base_phys + region.start; - *start_virt = (unsigned long) hose->io_base_virt + - region.start; - if (region.end > region.start) - *size = region.end - region.start + 1; - else { - printk("%s(): unexpected region 0x%lx->0x%lx\n", - __FUNCTION__, region.start, region.end); - return 1; - } - - } else { - /* Root Bus */ - res = &hose->io_resource; - *start_phys = hose->io_base_phys; - *start_virt = (unsigned long) hose->io_base_virt; - if (res->end > res->start) - *size = res->end - res->start + 1; - else { - printk("%s(): unexpected region 0x%lx->0x%lx\n", - __FUNCTION__, res->start, res->end); - return 1; - } - } - - return 0; -} - -int unmap_bus_range(struct pci_bus *bus) -{ - unsigned long start_phys; - unsigned long start_virt; - unsigned long size; - - if (!bus) { - printk(KERN_ERR "%s() expected bus\n", __FUNCTION__); - return 1; - } - - if (get_bus_io_range(bus, &start_phys, &start_virt, &size)) - return 1; - if (iounmap_explicit((void __iomem *) start_virt, size)) - return 1; - - return 0; -} -EXPORT_SYMBOL(unmap_bus_range); - -int remap_bus_range(struct pci_bus *bus) -{ - unsigned long start_phys; - unsigned long start_virt; - unsigned long size; - - if (!bus) { - printk(KERN_ERR "%s() expected bus\n", __FUNCTION__); - return 1; - } - - - if (get_bus_io_range(bus, &start_phys, &start_virt, &size)) - return 1; - printk("mapping IO %lx -> %lx, size: %lx\n", start_phys, start_virt, size); - if (__ioremap_explicit(start_phys, start_virt, size, - _PAGE_NO_CACHE | _PAGE_GUARDED)) - return 1; - - return 0; -} -EXPORT_SYMBOL(remap_bus_range); - -void phbs_remap_io(void) -{ - struct pci_controller *hose, *tmp; - - list_for_each_entry_safe(hose, tmp, &hose_list, list_node) - remap_bus_range(hose->bus); -} - -/* - * ppc64 can have multifunction devices that do not respond to function 0. - * In this case we must scan all functions. - * XXX this can go now, we use the OF device tree in all the - * cases that caused problems. -- paulus - */ -int pcibios_scan_all_fns(struct pci_bus *bus, int devfn) -{ - return 0; -} - -static void __devinit fixup_resource(struct resource *res, struct pci_dev *dev) -{ - struct pci_controller *hose = pci_bus_to_host(dev->bus); - unsigned long start, end, mask, offset; - - if (res->flags & IORESOURCE_IO) { - offset = (unsigned long)hose->io_base_virt - pci_io_base; - - start = res->start += offset; - end = res->end += offset; - - /* Need to allow IO access to pages that are in the - ISA range */ - if (start < MAX_ISA_PORT) { - if (end > MAX_ISA_PORT) - end = MAX_ISA_PORT; - - start >>= PAGE_SHIFT; - end >>= PAGE_SHIFT; - - /* get the range of pages for the map */ - mask = ((1 << (end+1)) - 1) ^ ((1 << start) - 1); - io_page_mask |= mask; - } - } else if (res->flags & IORESOURCE_MEM) { - res->start += hose->pci_mem_offset; - res->end += hose->pci_mem_offset; - } -} - -void __devinit pcibios_fixup_device_resources(struct pci_dev *dev, - struct pci_bus *bus) -{ - /* Update device resources. */ - int i; - - for (i = 0; i < PCI_NUM_RESOURCES; i++) - if (dev->resource[i].flags) - fixup_resource(&dev->resource[i], dev); -} -EXPORT_SYMBOL(pcibios_fixup_device_resources); - -static void __devinit do_bus_setup(struct pci_bus *bus) -{ - struct pci_dev *dev; - - ppc_md.iommu_bus_setup(bus); - - list_for_each_entry(dev, &bus->devices, bus_list) - ppc_md.iommu_dev_setup(dev); - - if (ppc_md.irq_bus_setup) - ppc_md.irq_bus_setup(bus); -} - -void __devinit pcibios_fixup_bus(struct pci_bus *bus) -{ - struct pci_dev *dev = bus->self; - - if (dev && pci_probe_only && - (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { - /* This is a subordinate bridge */ - - pci_read_bridge_bases(bus); - pcibios_fixup_device_resources(dev, bus); - } - - do_bus_setup(bus); - - if (!pci_probe_only) - return; - - list_for_each_entry(dev, &bus->devices, bus_list) - if ((dev->class >> 8) != PCI_CLASS_BRIDGE_PCI) - pcibios_fixup_device_resources(dev, bus); -} -EXPORT_SYMBOL(pcibios_fixup_bus); - -/* - * Reads the interrupt pin to determine if interrupt is use by card. - * If the interrupt is used, then gets the interrupt line from the - * openfirmware and sets it in the pci_dev and pci_config line. - */ -int pci_read_irq_line(struct pci_dev *pci_dev) -{ - u8 intpin; - struct device_node *node; - - pci_read_config_byte(pci_dev, PCI_INTERRUPT_PIN, &intpin); - if (intpin == 0) - return 0; - - node = pci_device_to_OF_node(pci_dev); - if (node == NULL) - return -1; - - if (node->n_intrs == 0) - return -1; - - pci_dev->irq = node->intrs[0].line; - - pci_write_config_byte(pci_dev, PCI_INTERRUPT_LINE, pci_dev->irq); - - return 0; -} -EXPORT_SYMBOL(pci_read_irq_line); - -void pci_resource_to_user(const struct pci_dev *dev, int bar, - const struct resource *rsrc, - u64 *start, u64 *end) -{ - struct pci_controller *hose = pci_bus_to_host(dev->bus); - unsigned long offset = 0; - - if (hose == NULL) - return; - - if (rsrc->flags & IORESOURCE_IO) - offset = pci_io_base - (unsigned long)hose->io_base_virt + - hose->io_base_phys; - - *start = rsrc->start + offset; - *end = rsrc->end + offset; -} - -#endif /* CONFIG_PPC_MULTIPLATFORM */ - - -#define IOBASE_BRIDGE_NUMBER 0 -#define IOBASE_MEMORY 1 -#define IOBASE_IO 2 -#define IOBASE_ISA_IO 3 -#define IOBASE_ISA_MEM 4 - -long sys_pciconfig_iobase(long which, unsigned long in_bus, - unsigned long in_devfn) -{ - struct pci_controller* hose; - struct list_head *ln; - struct pci_bus *bus = NULL; - struct device_node *hose_node; - - /* Argh ! Please forgive me for that hack, but that's the - * simplest way to get existing XFree to not lockup on some - * G5 machines... So when something asks for bus 0 io base - * (bus 0 is HT root), we return the AGP one instead. - */ - if (machine_is_compatible("MacRISC4")) - if (in_bus == 0) - in_bus = 0xf0; - - /* That syscall isn't quite compatible with PCI domains, but it's - * used on pre-domains setup. We return the first match - */ - - for (ln = pci_root_buses.next; ln != &pci_root_buses; ln = ln->next) { - bus = pci_bus_b(ln); - if (in_bus >= bus->number && in_bus < (bus->number + bus->subordinate)) - break; - bus = NULL; - } - if (bus == NULL || bus->sysdata == NULL) - return -ENODEV; - - hose_node = (struct device_node *)bus->sysdata; - hose = PCI_DN(hose_node)->phb; - - switch (which) { - case IOBASE_BRIDGE_NUMBER: - return (long)hose->first_busno; - case IOBASE_MEMORY: - return (long)hose->pci_mem_offset; - case IOBASE_IO: - return (long)hose->io_base_phys; - case IOBASE_ISA_IO: - return (long)isa_io_base; - case IOBASE_ISA_MEM: - return -EINVAL; - } - - return -EOPNOTSUPP; -} |
