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pci_64.c
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/*
* 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/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 <linux/irq.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <asm/prom.h>
#include <asm/pci-bridge.h>
#include <asm/byteorder.h>
#include <asm/machdep.h>
#include <asm/ppc-pci.h>
#include <asm/firmware.h>
#ifdef DEBUG
#include <asm/udbg.h>
#define DBG(fmt...) printk(fmt)
#else
#define DBG(fmt...)
#endif
unsigned long pci_probe_only = 1;
int pci_assign_all_buses = 0;
static void fixup_resource(struct resource *res, struct pci_dev *dev);
static void do_bus_setup(struct pci_bus *bus);
static void phbs_remap_io(void);
/* 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);
static struct dma_mapping_ops *pci_dma_ops;
int global_phb_number; /* Global phb counter */
/* Cached ISA bridge dev. */
struct pci_dev *ppc64_isabridge_dev = NULL;
EXPORT_SYMBOL_GPL(ppc64_isabridge_dev);
void set_pci_dma_ops(struct dma_mapping_ops *dma_ops)
{
pci_dma_ops = dma_ops;
}
struct dma_mapping_ops *get_pci_dma_ops(void)
{
return pci_dma_ops;
}
EXPORT_SYMBOL(get_pci_dma_ops);
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,
resource_size_t size, resource_size_t align)
{
struct pci_dev *dev = data;
struct pci_controller *hose = pci_bus_to_host(dev->bus);
resource_size_t 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.
*/
static 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);
}
struct pci_controller * pcibios_alloc_controller(struct device_node *dev)
{
struct pci_controller *phb;
if (mem_init_done)
phb = kmalloc(sizeof(struct pci_controller), GFP_KERNEL);
else
phb = alloc_bootmem(sizeof (struct pci_controller));
if (phb == NULL)
return NULL;
pci_setup_pci_controller(phb);
phb->arch_data = dev;
phb->is_dynamic = mem_init_done;
if (dev) {
int nid = of_node_to_nid(dev);
if (nid < 0 || !node_online(nid))
nid = -1;
PHB_SET_NODE(phb, nid);
}
return phb;
}
void pcibios_free_controller(struct pci_controller *phb)
{
spin_lock(&hose_spinlock);
list_del(&phb->list_node);
spin_unlock(&hose_spinlock);
if (phb->is_dynamic)
kfree(phb);
}
void __devinit 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);
}
#ifdef CONFIG_HOTPLUG
EXPORT_SYMBOL_GPL(pcibios_claim_one_bus);
#endif
static void __init pcibios_claim_of_setup(void)
{
struct pci_bus *b;
if (firmware_has_feature(FW_FEATURE_ISERIES))
return;
list_for_each_entry(b, &pci_root_buses, node)
pcibios_claim_one_bus(b);
}
static u32 get_int_prop(struct device_node *np, const char *name, u32 def)
{
const u32 *prop;
int len;
prop = of_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;
const u32 *addrs;
u32 i;
int proplen;
addrs = of_get_property(node, "assigned-addresses", &proplen);
if (!addrs)
return;
DBG(" parse addresses (%d bytes) @ %p\n", proplen, addrs);
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;
DBG(" base: %llx, size: %llx, i: %x\n",
(unsigned long long)base, (unsigned long long)size, 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 = 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 = alloc_pci_dev();
if (!dev)
return NULL;
type = of_get_property(node, "device_type", NULL);
if (type == NULL)
type = "";
DBG(" 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 = 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 = 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);
DBG(" 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;
/* Maybe do a default OF mapping here */
dev->irq = NO_IRQ;
}
pci_parse_of_addrs(node, dev);
DBG(" adding to system ...\n");
pci_device_add(dev, bus);
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;
const u32 *reg;
int reglen, devfn;
struct pci_dev *dev;
DBG("of_scan_bus(%s) bus no %d... \n", node->full_name, bus->number);
while ((child = of_get_next_child(node, child)) != NULL) {
DBG(" * %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(child, bus, devfn);
if (!dev)
continue;
DBG("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(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;
const u32 *busrange, *ranges;
int len, i, mode;
struct resource *res;
unsigned int flags;
u64 size;
DBG("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);
if (ranges == NULL) {
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;
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);
DBG(" bus name: %s\n", bus->name);
mode = PCI_PROBE_NORMAL;
if (ppc_md.pci_probe_mode)
mode = ppc_md.pci_probe_mode(bus);
DBG(" probe mode: %d\n", mode);
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);
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;
DBG("Scanning PHB %s\n", node ? node->full_name : "<NO NAME>");
bus = pci_create_bus(hose->parent, 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;
if (node && ppc_md.pci_probe_mode)
mode = ppc_md.pci_probe_mode(bus);
DBG(" probe mode: %d\n", mode);
if (mode == PCI_PROBE_DEVTREE) {
bus->subordinate = hose->last_busno;
of_scan_bus(node, bus);
}
if (mode == PCI_PROBE_NORMAL)
hose->last_busno = bus->subordinate = pci_scan_child_bus(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;
if (firmware_has_feature(FW_FEATURE_ISERIES))
iSeries_pcibios_init();
printk(KERN_DEBUG "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);
pci_bus_add_devices(hose->bus);
}
if (!firmware_has_feature(FW_FEATURE_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();
}
/* 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(KERN_DEBUG "ISA bridge at %s\n", pci_name(ppc64_isabridge_dev));
if (!firmware_has_feature(FW_FEATURE_ISERIES))
/* map in PCI I/O space */
phbs_remap_io();
printk(KERN_DEBUG "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)
{
if (firmware_has_feature(FW_FEATURE_ISERIES))
return 0;
else {
struct pci_controller *hose = pci_bus_to_host(bus);
return hose->global_number;
}
}
EXPORT_SYMBOL(pci_domain_nr);
/* Decide whether to display the domain number in /proc */
int pci_proc_domain(struct pci_bus *bus)
{
if (firmware_has_feature(FW_FEATURE_ISERIES))
return 0;
else {
struct pci_controller *hose = pci_bus_to_host(bus);
return hose->buid;
}
}
/*
* 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,
resource_size_t *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) {
#if 0 /* See comment in pci_resource_to_user() for why this is disabled */
*offset += hose->pci_mem_offset;
#endif
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;
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)
{
resource_size_t 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_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;
}
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);
void pcibios_add_platform_entries(struct pci_dev *pdev)
{
device_create_file(&pdev->dev, &dev_attr_devspec);
}
#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)
{
/* Remove these asap */
struct pci_address {
u32 a_hi;
u32 a_mid;
u32 a_lo;
};
struct isa_address {
u32 a_hi;
u32 a_lo;
};
struct isa_range {
struct isa_address isa_addr;
struct pci_address pci_addr;
unsigned int size;
};
const struct isa_range *range;
unsigned long pci_addr;
unsigned int isa_addr;
unsigned int size;
int rlen = 0;
range = of_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)
{
const unsigned int *ranges;
unsigned int pci_space;
unsigned long size;
int rlen = 0;
int memno = 0;
struct resource *res;
int np, na = of_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
*/
ranges = of_get_property(dev, "ranges", &rlen);
if (ranges == NULL)
return;
hose->io_base_phys = 0;
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 = of_translate_address(dev, &ranges[3]);
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;