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Merge branch 'of-pci' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 

* 'of-pci' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  pci/of: Consolidate pci_bus_to_OF_node()
  pci/of: Consolidate pci_device_to_OF_node()
  x86/devicetree: Use generic PCI <-> OF matching
  microblaze/pci: Move the remains of pci_32.c to pci-common.c
  microblaze/pci: Remove powermac originated cruft
  pci/of: Match PCI devices to OF nodes dynamically
This commit is contained in:
Linus Torvalds 2011-07-22 14:54:02 -07:00
parent 8181780c16 ef3b4f8cc2
commit acb41c0f92
30 changed files with 398 additions and 862 deletions
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13
arch/microblaze/include/asm/pci-bridge.h
View File

@ -19,9 +19,6 @@ enum {
*/ */
PCI_REASSIGN_ALL_RSRC = 0x00000001, PCI_REASSIGN_ALL_RSRC = 0x00000001,
/* Re-assign all bus numbers */
PCI_REASSIGN_ALL_BUS = 0x00000002,
/* Do not try to assign, just use existing setup */ /* Do not try to assign, just use existing setup */
PCI_PROBE_ONLY = 0x00000004, PCI_PROBE_ONLY = 0x00000004,
@ -110,16 +107,6 @@ static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
return bus->sysdata; return bus->sysdata;
} }
static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
{
struct pci_controller *host;
if (bus->self)
return pci_device_to_OF_node(bus->self);
host = pci_bus_to_host(bus);
return host ? host->dn : NULL;
}
static inline int isa_vaddr_is_ioport(void __iomem *address) static inline int isa_vaddr_is_ioport(void __iomem *address)
{ {
/* No specific ISA handling on ppc32 at this stage, it /* No specific ISA handling on ppc32 at this stage, it

3
arch/microblaze/include/asm/pci.h
View File

@ -40,8 +40,7 @@ struct pci_dev;
* Set this to 1 if you want the kernel to re-assign all PCI * Set this to 1 if you want the kernel to re-assign all PCI
* bus numbers (don't do that on ppc64 yet !) * bus numbers (don't do that on ppc64 yet !)
*/ */
#define pcibios_assign_all_busses() \ #define pcibios_assign_all_busses() 0
(pci_has_flag(PCI_REASSIGN_ALL_BUS))
static inline void pcibios_set_master(struct pci_dev *dev) static inline void pcibios_set_master(struct pci_dev *dev)
{ {

15
arch/microblaze/include/asm/prom.h
View File

@ -29,21 +29,6 @@
extern int early_uartlite_console(void); extern int early_uartlite_console(void);
extern int early_uart16550_console(void); extern int early_uart16550_console(void);
#ifdef CONFIG_PCI
/*
* PCI <-> OF matching functions
* (XXX should these be here?)
*/
struct pci_bus;
struct pci_dev;
extern int pci_device_from_OF_node(struct device_node *node,
u8 *bus, u8 *devfn);
extern struct device_node *pci_busdev_to_OF_node(struct pci_bus *bus,
int devfn);
extern struct device_node *pci_device_to_OF_node(struct pci_dev *dev);
extern void pci_create_OF_bus_map(void);
#endif
/* /*
* OF address retreival & translation * OF address retreival & translation
*/ */

2
arch/microblaze/pci/Makefile
View File

@ -2,5 +2,5 @@
# Makefile # Makefile
# #
obj-$(CONFIG_PCI) += pci_32.o pci-common.o indirect_pci.o iomap.o obj-$(CONFIG_PCI) += pci-common.o indirect_pci.o iomap.o
obj-$(CONFIG_PCI_XILINX) += xilinx_pci.o obj-$(CONFIG_PCI_XILINX) += xilinx_pci.o

112
arch/microblaze/pci/pci-common.c
View File

@ -50,6 +50,11 @@ unsigned int pci_flags;
static struct dma_map_ops *pci_dma_ops = &dma_direct_ops; static struct dma_map_ops *pci_dma_ops = &dma_direct_ops;
unsigned long isa_io_base;
unsigned long pci_dram_offset;
static int pci_bus_count;
void set_pci_dma_ops(struct dma_map_ops *dma_ops) void set_pci_dma_ops(struct dma_map_ops *dma_ops)
{ {
pci_dma_ops = dma_ops; pci_dma_ops = dma_ops;
@ -1558,6 +1563,112 @@ void __devinit pcibios_setup_phb_resources(struct pci_controller *hose)
(unsigned long)hose->io_base_virt - _IO_BASE); (unsigned long)hose->io_base_virt - _IO_BASE);
} }
struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
{
struct pci_controller *hose = bus->sysdata;
return of_node_get(hose->dn);
}
static void __devinit pcibios_scan_phb(struct pci_controller *hose)
{
struct pci_bus *bus;
struct device_node *node = hose->dn;
unsigned long io_offset;
struct resource *res = &hose->io_resource;
pr_debug("PCI: Scanning PHB %s\n",
node ? node->full_name : "<NO NAME>");
/* Create an empty bus for the toplevel */
bus = pci_create_bus(hose->parent, hose->first_busno, hose->ops, hose);
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;
/* Fixup IO space offset */
io_offset = (unsigned long)hose->io_base_virt - isa_io_base;
res->start = (res->start + io_offset) & 0xffffffffu;
res->end = (res->end + io_offset) & 0xffffffffu;
/* Wire up PHB bus resources */
pcibios_setup_phb_resources(hose);
/* Scan children */
hose->last_busno = bus->subordinate = pci_scan_child_bus(bus);
}
static int __init pcibios_init(void)
{
struct pci_controller *hose, *tmp;
int next_busno = 0;
printk(KERN_INFO "PCI: Probing PCI hardware\n");
/* Scan all of the recorded PCI controllers. */
list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
hose->last_busno = 0xff;
pcibios_scan_phb(hose);
printk(KERN_INFO "calling pci_bus_add_devices()\n");
pci_bus_add_devices(hose->bus);
if (next_busno <= hose->last_busno)
next_busno = hose->last_busno + 1;
}
pci_bus_count = next_busno;
/* Call common code to handle resource allocation */
pcibios_resource_survey();
return 0;
}
subsys_initcall(pcibios_init);
static struct pci_controller *pci_bus_to_hose(int bus)
{
struct pci_controller *hose, *tmp;
list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
if (bus >= hose->first_busno && bus <= hose->last_busno)
return hose;
return NULL;
}
/* Provide information on locations of various I/O regions in physical
* memory. Do this on a per-card basis so that we choose the right
* root bridge.
* Note that the returned IO or memory base is a physical address
*/
long sys_pciconfig_iobase(long which, unsigned long bus, unsigned long devfn)
{
struct pci_controller *hose;
long result = -EOPNOTSUPP;
hose = pci_bus_to_hose(bus);
if (!hose)
return -ENODEV;
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 (long)isa_mem_base;
}
return result;
}
/* /*
* Null PCI config access functions, for the case when we can't * Null PCI config access functions, for the case when we can't
* find a hose. * find a hose.
@ -1626,3 +1737,4 @@ int early_find_capability(struct pci_controller *hose, int bus, int devfn,
{ {
return pci_bus_find_capability(fake_pci_bus(hose, bus), devfn, cap); return pci_bus_find_capability(fake_pci_bus(hose, bus), devfn, cap);
} }

432
arch/microblaze/pci/pci_32.c
View File

@ -1,432 +0,0 @@
/*
* Common pmac/prep/chrp pci routines. -- Cort
*/
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/capability.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/bootmem.h>
#include <linux/irq.h>
#include <linux/list.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <asm/prom.h>
#include <asm/sections.h>
#include <asm/pci-bridge.h>
#include <asm/byteorder.h>
#include <asm/uaccess.h>
#undef DEBUG
unsigned long isa_io_base;
unsigned long pci_dram_offset;
int pcibios_assign_bus_offset = 1;
static u8 *pci_to_OF_bus_map;
/* By default, we don't re-assign bus numbers. We do this only on
* some pmacs
*/
static int pci_assign_all_buses;
static int pci_bus_count;
/*
* Functions below are used on OpenFirmware machines.
*/
static void
make_one_node_map(struct device_node *node, u8 pci_bus)
{
const int *bus_range;
int len;
if (pci_bus >= pci_bus_count)
return;
bus_range = of_get_property(node, "bus-range", &len);
if (bus_range == NULL || len < 2 * sizeof(int)) {
printk(KERN_WARNING "Can't get bus-range for %s, "
"assuming it starts at 0\n", node->full_name);
pci_to_OF_bus_map[pci_bus] = 0;
} else
pci_to_OF_bus_map[pci_bus] = bus_range[0];
for_each_child_of_node(node, node) {
struct pci_dev *dev;
const unsigned int *class_code, *reg;
class_code = of_get_property(node, "class-code", NULL);
if (!class_code ||
((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
(*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS))
continue;
reg = of_get_property(node, "reg", NULL);
if (!reg)
continue;
dev = pci_get_bus_and_slot(pci_bus, ((reg[0] >> 8) & 0xff));
if (!dev || !dev->subordinate) {
pci_dev_put(dev);
continue;
}
make_one_node_map(node, dev->subordinate->number);
pci_dev_put(dev);
}
}
void
pcibios_make_OF_bus_map(void)
{
int i;
struct pci_controller *hose, *tmp;
struct property *map_prop;
struct device_node *dn;
pci_to_OF_bus_map = kmalloc(pci_bus_count, GFP_KERNEL);
if (!pci_to_OF_bus_map) {
printk(KERN_ERR "Can't allocate OF bus map !\n");
return;
}
/* We fill the bus map with invalid values, that helps
* debugging.
*/
for (i = 0; i < pci_bus_count; i++)
pci_to_OF_bus_map[i] = 0xff;
/* For each hose, we begin searching bridges */
list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
struct device_node *node = hose->dn;
if (!node)
continue;
make_one_node_map(node, hose->first_busno);
}
dn = of_find_node_by_path("/");
map_prop = of_find_property(dn, "pci-OF-bus-map", NULL);
if (map_prop) {
BUG_ON(pci_bus_count > map_prop->length);
memcpy(map_prop->value, pci_to_OF_bus_map, pci_bus_count);
}
of_node_put(dn);
#ifdef DEBUG
printk(KERN_INFO "PCI->OF bus map:\n");
for (i = 0; i < pci_bus_count; i++) {
if (pci_to_OF_bus_map[i] == 0xff)
continue;
printk(KERN_INFO "%d -> %d\n", i, pci_to_OF_bus_map[i]);
}
#endif
}
typedef int (*pci_OF_scan_iterator)(struct device_node *node, void *data);
static struct device_node *scan_OF_pci_childs(struct device_node *parent,
pci_OF_scan_iterator filter, void *data)
{
struct device_node *node;
struct device_node *sub_node;
for_each_child_of_node(parent, node) {
const unsigned int *class_code;
if (filter(node, data)) {
of_node_put(node);
return node;
}
/* For PCI<->PCI bridges or CardBus bridges, we go down
* Note: some OFs create a parent node "multifunc-device" as
* a fake root for all functions of a multi-function device,
* we go down them as well.
*/
class_code = of_get_property(node, "class-code", NULL);
if ((!class_code ||
((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
(*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS)) &&
strcmp(node->name, "multifunc-device"))
continue;
sub_node = scan_OF_pci_childs(node, filter, data);
if (sub_node) {
of_node_put(node);
return sub_node;
}
}
return NULL;
}
static struct device_node *scan_OF_for_pci_dev(struct device_node *parent,
unsigned int devfn)
{
struct device_node *np, *cnp;
const u32 *reg;
unsigned int psize;
for_each_child_of_node(parent, np) {
reg = of_get_property(np, "reg", &psize);
if (reg && psize >= 4 && ((reg[0] >> 8) & 0xff) == devfn)
return np;
/* Note: some OFs create a parent node "multifunc-device" as
* a fake root for all functions of a multi-function device,
* we go down them as well. */
if (!strcmp(np->name, "multifunc-device")) {
cnp = scan_OF_for_pci_dev(np, devfn);
if (cnp)
return cnp;
}
}
return NULL;
}
static struct device_node *scan_OF_for_pci_bus(struct pci_bus *bus)
{
struct device_node *parent, *np;
/* Are we a root bus ? */
if (bus->self == NULL || bus->parent == NULL) {
struct pci_controller *hose = pci_bus_to_host(bus);
if (hose == NULL)
return NULL;
return of_node_get(hose->dn);
}
/* not a root bus, we need to get our parent */
parent = scan_OF_for_pci_bus(bus->parent);
if (parent == NULL)
return NULL;
/* now iterate for children for a match */
np = scan_OF_for_pci_dev(parent, bus->self->devfn);
of_node_put(parent);
return np;
}
/*
* Scans the OF tree for a device node matching a PCI device
*/
struct device_node *
pci_busdev_to_OF_node(struct pci_bus *bus, int devfn)
{
struct device_node *parent, *np;
pr_debug("pci_busdev_to_OF_node(%d,0x%x)\n", bus->number, devfn);
parent = scan_OF_for_pci_bus(bus);
if (parent == NULL)
return NULL;
pr_debug(" parent is %s\n", parent ? parent->full_name : "<NULL>");
np = scan_OF_for_pci_dev(parent, devfn);
of_node_put(parent);
pr_debug(" result is %s\n", np ? np->full_name : "<NULL>");
/* XXX most callers don't release the returned node
* mostly because ppc64 doesn't increase the refcount,
* we need to fix that.
*/
return np;
}
EXPORT_SYMBOL(pci_busdev_to_OF_node);
struct device_node*
pci_device_to_OF_node(struct pci_dev *dev)
{
return pci_busdev_to_OF_node(dev->bus, dev->devfn);
}
EXPORT_SYMBOL(pci_device_to_OF_node);
static int
find_OF_pci_device_filter(struct device_node *node, void *data)
{
return ((void *)node == data);
}
/*
* Returns the PCI device matching a given OF node
*/
int
pci_device_from_OF_node(struct device_node *node, u8 *bus, u8 *devfn)
{
const unsigned int *reg;
struct pci_controller *hose;
struct pci_dev *dev = NULL;
/* Make sure it's really a PCI device */
hose = pci_find_hose_for_OF_device(node);
if (!hose || !hose->dn)
return -ENODEV;
if (!scan_OF_pci_childs(hose->dn,
find_OF_pci_device_filter, (void *)node))
return -ENODEV;
reg = of_get_property(node, "reg", NULL);
if (!reg)
return -ENODEV;
*bus = (reg[0] >> 16) & 0xff;
*devfn = ((reg[0] >> 8) & 0xff);
/* Ok, here we need some tweak. If we have already renumbered
* all busses, we can't rely on the OF bus number any more.
* the pci_to_OF_bus_map is not enough as several PCI busses
* may match the same OF bus number.
*/
if (!pci_to_OF_bus_map)
return 0;
for_each_pci_dev(dev)
if (pci_to_OF_bus_map[dev->bus->number] == *bus &&
dev->devfn == *devfn) {
*bus = dev->bus->number;
pci_dev_put(dev);
return 0;
}
return -ENODEV;
}
EXPORT_SYMBOL(pci_device_from_OF_node);
/* We create the "pci-OF-bus-map" property now so it appears in the
* /proc device tree
*/
void __init
pci_create_OF_bus_map(void)
{
struct property *of_prop;
struct device_node *dn;
of_prop = (struct property *) alloc_bootmem(sizeof(struct property) + \
256);
if (!of_prop)
return;
dn = of_find_node_by_path("/");
if (dn) {
memset(of_prop, -1, sizeof(struct property) + 256);
of_prop->name = "pci-OF-bus-map";
of_prop->length = 256;
of_prop->value = &of_prop[1];
prom_add_property(dn, of_prop);
of_node_put(dn);
}
}
static void __devinit pcibios_scan_phb(struct pci_controller *hose)
{
struct pci_bus *bus;
struct device_node *node = hose->dn;
unsigned long io_offset;
struct resource *res = &hose->io_resource;
pr_debug("PCI: Scanning PHB %s\n",
node ? node->full_name : "<NO NAME>");
/* Create an empty bus for the toplevel */
bus = pci_create_bus(hose->parent, hose->first_busno, hose->ops, hose);
if (bus == NULL) {
printk(KERN_ERR "Failed to create bus for PCI domain %04x\n",
hose->global_number);
return;
}
bus.dev->of_node = of_node_get(node);
bus->secondary = hose->first_busno;
hose->bus = bus;
/* Fixup IO space offset */
io_offset = (unsigned long)hose->io_base_virt - isa_io_base;
res->start = (res->start + io_offset) & 0xffffffffu;
res->end = (res->end + io_offset) & 0xffffffffu;
/* Wire up PHB bus resources */
pcibios_setup_phb_resources(hose);
/* Scan children */
hose->last_busno = bus->subordinate = pci_scan_child_bus(bus);
}
static int __init pcibios_init(void)
{
struct pci_controller *hose, *tmp;
int next_busno = 0;
printk(KERN_INFO "PCI: Probing PCI hardware\n");
if (pci_flags & PCI_REASSIGN_ALL_BUS) {
printk(KERN_INFO "setting pci_asign_all_busses\n");
pci_assign_all_buses = 1;
}
/* Scan all of the recorded PCI controllers. */
list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
if (pci_assign_all_buses)
hose->first_busno = next_busno;
hose->last_busno = 0xff;
pcibios_scan_phb(hose);
printk(KERN_INFO "calling pci_bus_add_devices()\n");
pci_bus_add_devices(hose->bus);
if (pci_assign_all_buses || next_busno <= hose->last_busno)
next_busno = hose->last_busno + \
pcibios_assign_bus_offset;
}
pci_bus_count = next_busno;
/* OpenFirmware based machines need a map of OF bus
* numbers vs. kernel bus numbers since we may have to
* remap them.
*/
if (pci_assign_all_buses)
pcibios_make_OF_bus_map();
/* Call common code to handle resource allocation */
pcibios_resource_survey();
return 0;
}
subsys_initcall(pcibios_init);
static struct pci_controller*
pci_bus_to_hose(int bus)
{
struct pci_controller *hose, *tmp;
list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
if (bus >= hose->first_busno && bus <= hose->last_busno)
return hose;
return NULL;
}
/* Provide information on locations of various I/O regions in physical
* memory. Do this on a per-card basis so that we choose the right
* root bridge.
* Note that the returned IO or memory base is a physical address
*/
long sys_pciconfig_iobase(long which, unsigned long bus, unsigned long devfn)
{
struct pci_controller *hose;
long result = -EOPNOTSUPP;
hose = pci_bus_to_hose(bus);
if (!hose)
return -ENODEV;
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 (long)isa_mem_base;
}
return result;
}

29
arch/powerpc/include/asm/pci-bridge.h
View File

@ -171,15 +171,9 @@ static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
#ifndef CONFIG_PPC64 #ifndef CONFIG_PPC64
static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus) extern int pci_device_from_OF_node(struct device_node *node,
{ u8 *bus, u8 *devfn);
struct pci_controller *host; extern void pci_create_OF_bus_map(void);
if (bus->self)
return pci_device_to_OF_node(bus->self);
host = pci_bus_to_host(bus);
return host ? host->dn : NULL;
}
static inline int isa_vaddr_is_ioport(void __iomem *address) static inline int isa_vaddr_is_ioport(void __iomem *address)
{ {
@ -223,17 +217,8 @@ struct pci_dn {
/* Get the pointer to a device_node's pci_dn */ /* Get the pointer to a device_node's pci_dn */
#define PCI_DN(dn) ((struct pci_dn *) (dn)->data) #define PCI_DN(dn) ((struct pci_dn *) (dn)->data)
extern struct device_node *fetch_dev_dn(struct pci_dev *dev);
extern void * update_dn_pci_info(struct device_node *dn, void *data); extern void * update_dn_pci_info(struct device_node *dn, void *data);
/* Get a device_node from a pci_dev. This code must be fast except
* in the case where the sysdata is incorrect and needs to be fixed
* up (this will only happen once). */
static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
{
return dev->dev.of_node ? dev->dev.of_node : fetch_dev_dn(dev);
}
static inline int pci_device_from_OF_node(struct device_node *np, static inline int pci_device_from_OF_node(struct device_node *np,
u8 *bus, u8 *devfn) u8 *bus, u8 *devfn)
{ {
@ -244,14 +229,6 @@ static inline int pci_device_from_OF_node(struct device_node *np,
return 0; return 0;
} }
static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
{
if (bus->self)
return pci_device_to_OF_node(bus->self);
else
return bus->dev.of_node; /* Must be root bus (PHB) */
}
/** Find the bus corresponding to the indicated device node */ /** Find the bus corresponding to the indicated device node */
extern struct pci_bus *pcibios_find_pci_bus(struct device_node *dn); extern struct pci_bus *pcibios_find_pci_bus(struct device_node *dn);

3
arch/powerpc/include/asm/pci.h
View File

@ -179,8 +179,7 @@ extern int remove_phb_dynamic(struct pci_controller *phb);
extern struct pci_dev *of_create_pci_dev(struct device_node *node, extern struct pci_dev *of_create_pci_dev(struct device_node *node,
struct pci_bus *bus, int devfn); struct pci_bus *bus, int devfn);
extern void of_scan_pci_bridge(struct device_node *node, extern void of_scan_pci_bridge(struct pci_dev *dev);
struct pci_dev *dev);
extern void of_scan_bus(struct device_node *node, struct pci_bus *bus); extern void of_scan_bus(struct device_node *node, struct pci_bus *bus);
extern void of_rescan_bus(struct device_node *node, struct pci_bus *bus); extern void of_rescan_bus(struct device_node *node, struct pci_bus *bus);

14
arch/powerpc/include/asm/prom.h
View File

@ -22,20 +22,6 @@
#define HAVE_ARCH_DEVTREE_FIXUPS #define HAVE_ARCH_DEVTREE_FIXUPS
#ifdef CONFIG_PPC32
/*
* PCI <-> OF matching functions
* (XXX should these be here?)
*/
struct pci_bus;
struct pci_dev;
extern int pci_device_from_OF_node(struct device_node *node,
u8* bus, u8* devfn);
extern struct device_node* pci_busdev_to_OF_node(struct pci_bus *, int);
extern struct device_node* pci_device_to_OF_node(struct pci_dev *);
extern void pci_create_OF_bus_map(void);
#endif
/* /*
* OF address retreival & translation * OF address retreival & translation
*/ */

11
arch/powerpc/kernel/pci-common.c
View File

@ -1097,9 +1097,6 @@ void __devinit pcibios_setup_bus_devices(struct pci_bus *bus)
if (dev->is_added) if (dev->is_added)
continue; continue;
/* Setup OF node pointer in the device */
dev->dev.of_node = pci_device_to_OF_node(dev);
/* Fixup NUMA node as it may not be setup yet by the generic /* Fixup NUMA node as it may not be setup yet by the generic
* code and is needed by the DMA init * code and is needed by the DMA init
*/ */
@ -1685,6 +1682,13 @@ int early_find_capability(struct pci_controller *hose, int bus, int devfn,
return pci_bus_find_capability(fake_pci_bus(hose, bus), devfn, cap); return pci_bus_find_capability(fake_pci_bus(hose, bus), devfn, cap);
} }
struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
{
struct pci_controller *hose = bus->sysdata;
return of_node_get(hose->dn);
}
/** /**
* pci_scan_phb - Given a pci_controller, setup and scan the PCI bus * pci_scan_phb - Given a pci_controller, setup and scan the PCI bus
* @hose: Pointer to the PCI host controller instance structure * @hose: Pointer to the PCI host controller instance structure
@ -1705,7 +1709,6 @@ void __devinit pcibios_scan_phb(struct pci_controller *hose)
hose->global_number); hose->global_number);
return; return;
} }
bus->dev.of_node = of_node_get(node);
bus->secondary = hose->first_busno; bus->secondary = hose->first_busno;
hose->bus = bus; hose->bus = bus;

150
arch/powerpc/kernel/pci_32.c
View File

@ -167,150 +167,26 @@ pcibios_make_OF_bus_map(void)
#endif #endif
} }
typedef int (*pci_OF_scan_iterator)(struct device_node* node, void* data);
static struct device_node*
scan_OF_pci_childs(struct device_node *parent, pci_OF_scan_iterator filter, void* data)
{
struct device_node *node;
struct device_node* sub_node;
for_each_child_of_node(parent, node) {
const unsigned int *class_code;
if (filter(node, data)) {
of_node_put(node);
return node;
}
/* For PCI<->PCI bridges or CardBus bridges, we go down
* Note: some OFs create a parent node "multifunc-device" as
* a fake root for all functions of a multi-function device,
* we go down them as well.
*/
class_code = of_get_property(node, "class-code", NULL);
if ((!class_code || ((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
(*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS)) &&
strcmp(node->name, "multifunc-device"))
continue;
sub_node = scan_OF_pci_childs(node, filter, data);
if (sub_node) {
of_node_put(node);
return sub_node;
}
}
return NULL;
}
static struct device_node *scan_OF_for_pci_dev(struct device_node *parent,
unsigned int devfn)
{
struct device_node *np, *cnp;
const u32 *reg;
unsigned int psize;
for_each_child_of_node(parent, np) {
reg = of_get_property(np, "reg", &psize);
if (reg && psize >= 4 && ((reg[0] >> 8) & 0xff) == devfn)
return np;
/* Note: some OFs create a parent node "multifunc-device" as
* a fake root for all functions of a multi-function device,
* we go down them as well. */
if (!strcmp(np->name, "multifunc-device")) {
cnp = scan_OF_for_pci_dev(np, devfn);
if (cnp)
return cnp;
}
}
return NULL;
}
static struct device_node *scan_OF_for_pci_bus(struct pci_bus *bus)
{
struct device_node *parent, *np;
/* Are we a root bus ? */
if (bus->self == NULL || bus->parent == NULL) {
struct pci_controller *hose = pci_bus_to_host(bus);
if (hose == NULL)
return NULL;
return of_node_get(hose->dn);
}
/* not a root bus, we need to get our parent */
parent = scan_OF_for_pci_bus(bus->parent);
if (parent == NULL)
return NULL;
/* now iterate for children for a match */
np = scan_OF_for_pci_dev(parent, bus->self->devfn);
of_node_put(parent);
return np;
}
/*
* Scans the OF tree for a device node matching a PCI device
*/
struct device_node *
pci_busdev_to_OF_node(struct pci_bus *bus, int devfn)
{
struct device_node *parent, *np;
pr_debug("pci_busdev_to_OF_node(%d,0x%x)\n", bus->number, devfn);
parent = scan_OF_for_pci_bus(bus);
if (parent == NULL)
return NULL;
pr_debug(" parent is %s\n", parent ? parent->full_name : "<NULL>");
np = scan_OF_for_pci_dev(parent, devfn);
of_node_put(parent);
pr_debug(" result is %s\n", np ? np->full_name : "<NULL>");
/* XXX most callers don't release the returned node
* mostly because ppc64 doesn't increase the refcount,
* we need to fix that.
*/
return np;
}
EXPORT_SYMBOL(pci_busdev_to_OF_node);
struct device_node*
pci_device_to_OF_node(struct pci_dev *dev)
{
return pci_busdev_to_OF_node(dev->bus, dev->devfn);
}
EXPORT_SYMBOL(pci_device_to_OF_node);
static int
find_OF_pci_device_filter(struct device_node* node, void* data)
{
return ((void *)node == data);
}
/* /*
* Returns the PCI device matching a given OF node * Returns the PCI device matching a given OF node
*/ */
int int pci_device_from_OF_node(struct device_node *node, u8 *bus, u8 *devfn)
pci_device_from_OF_node(struct device_node* node, u8* bus, u8* devfn)
{ {
const unsigned int *reg; struct pci_dev *dev = NULL;
struct pci_controller* hose; const __be32 *reg;
struct pci_dev* dev = NULL; int size;
/* Make sure it's really a PCI device */ /* Check if it might have a chance to be a PCI device */
hose = pci_find_hose_for_OF_device(node); if (!pci_find_hose_for_OF_device(node))
if (!hose || !hose->dn)
return -ENODEV; return -ENODEV;
if (!scan_OF_pci_childs(hose->dn,
find_OF_pci_device_filter, (void *)node)) reg = of_get_property(node, "reg", &size);
if (!reg || size < 5 * sizeof(u32))
return -ENODEV; return -ENODEV;
reg = of_get_property(node, "reg", NULL);
if (!reg) *bus = (be32_to_cpup(&reg[0]) >> 16) & 0xff;
return -ENODEV; *devfn = (be32_to_cpup(&reg[0]) >> 8) & 0xff;
*bus = (reg[0] >> 16) & 0xff;
*devfn = ((reg[0] >> 8) & 0xff);
/* Ok, here we need some tweak. If we have already renumbered /* Ok, here we need some tweak. If we have already renumbered
* all busses, we can't rely on the OF bus number any more. * all busses, we can't rely on the OF bus number any more.

47
arch/powerpc/kernel/pci_dn.c
View File

@ -142,53 +142,6 @@ void __devinit pci_devs_phb_init_dynamic(struct pci_controller *phb)
traverse_pci_devices(dn, update_dn_pci_info, phb); traverse_pci_devices(dn, update_dn_pci_info, phb);
} }
/*
* Traversal func that looks for a <busno,devfcn> value.
* If found, the pci_dn is returned (thus terminating the traversal).
*/
static void *is_devfn_node(struct device_node *dn, void *data)
{
int busno = ((unsigned long)data >> 8) & 0xff;
int devfn = ((unsigned long)data) & 0xff;
struct pci_dn *pci = dn->data;
if (pci && (devfn == pci->devfn) && (busno == pci->busno))
return dn;
return NULL;
}
/*
* This is the "slow" path for looking up a device_node from a
* pci_dev. It will hunt for the device under its parent's
* phb and then update of_node pointer.
*
* It may also do fixups on the actual device since this happens
* on the first read/write.
*
* Note that it also must deal with devices that don't exist.
* In this case it may probe for real hardware ("just in case")
* and add a device_node to the device tree if necessary.
*
* Is this function necessary anymore now that dev->dev.of_node is
* used to store the node pointer?
*
*/
struct device_node *fetch_dev_dn(struct pci_dev *dev)
{
struct pci_controller *phb = dev->sysdata;
struct device_node *dn;
unsigned long searchval = (dev->bus->number << 8) | dev->devfn;
if (WARN_ON(!phb))
return NULL;
dn = traverse_pci_devices(phb->dn, is_devfn_node, (void *)searchval);
if (dn)
dev->dev.of_node = dn;
return dn;
}
EXPORT_SYMBOL(fetch_dev_dn);
/** /**
* pci_devs_phb_init - Initialize phbs and pci devs under them. * pci_devs_phb_init - Initialize phbs and pci devs under them.
* *

9
arch/powerpc/kernel/pci_of_scan.c
View File

@ -202,9 +202,9 @@ EXPORT_SYMBOL(of_create_pci_dev);
* this routine in turn call of_scan_bus() recusively to scan for more child * this routine in turn call of_scan_bus() recusively to scan for more child
* devices. * devices.
*/ */
void __devinit of_scan_pci_bridge(struct device_node *node, void __devinit of_scan_pci_bridge(struct pci_dev *dev)
struct pci_dev *dev)
{ {
struct device_node *node = dev->dev.of_node;
struct pci_bus *bus; struct pci_bus *bus;
const u32 *busrange, *ranges; const u32 *busrange, *ranges;
int len, i, mode; int len, i, mode;
@ -238,7 +238,6 @@ void __devinit of_scan_pci_bridge(struct device_node *node,
bus->primary = dev->bus->number; bus->primary = dev->bus->number;
bus->subordinate = busrange[1]; bus->subordinate = busrange[1];
bus->bridge_ctl = 0; bus->bridge_ctl = 0;
bus->dev.of_node = of_node_get(node);
/* parse ranges property */ /* parse ranges property */
/* PCI #address-cells == 3 and #size-cells == 2 always */ /* PCI #address-cells == 3 and #size-cells == 2 always */
@ -335,9 +334,7 @@ static void __devinit __of_scan_bus(struct device_node *node,
list_for_each_entry(dev, &bus->devices, bus_list) { list_for_each_entry(dev, &bus->devices, bus_list) {
if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
struct device_node *child = pci_device_to_OF_node(dev); of_scan_pci_bridge(dev);
if (child)
of_scan_pci_bridge(child, dev);
} }
} }
} }

3
arch/powerpc/platforms/powermac/pci.c
View File

@ -17,6 +17,7 @@
#include <linux/init.h> #include <linux/init.h>
#include <linux/bootmem.h> #include <linux/bootmem.h>
#include <linux/irq.h> #include <linux/irq.h>
#include <linux/of_pci.h>
#include <asm/sections.h> #include <asm/sections.h>
#include <asm/io.h> #include <asm/io.h>
@ -235,7 +236,7 @@ static int chaos_validate_dev(struct pci_bus *bus, int devfn, int offset)
if (offset >= 0x100) if (offset >= 0x100)
return PCIBIOS_BAD_REGISTER_NUMBER; return PCIBIOS_BAD_REGISTER_NUMBER;
np = pci_busdev_to_OF_node(bus, devfn); np = of_pci_find_child_device(bus->dev.of_node, devfn);
if (np == NULL) if (np == NULL)
return PCIBIOS_DEVICE_NOT_FOUND; return PCIBIOS_DEVICE_NOT_FOUND;

3
arch/sparc/include/asm/pci_32.h
View File

@ -42,9 +42,6 @@ static inline void pci_dma_burst_advice(struct pci_dev *pdev,
} }
#endif #endif
struct device_node;
extern struct device_node *pci_device_to_OF_node(struct pci_dev *pdev);
#endif /* __KERNEL__ */ #endif /* __KERNEL__ */
#ifndef CONFIG_LEON_PCI #ifndef CONFIG_LEON_PCI

3
arch/sparc/include/asm/pci_64.h
View File

@ -91,9 +91,6 @@ static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
return PCI_IRQ_NONE; return PCI_IRQ_NONE;
} }
struct device_node;
extern struct device_node *pci_device_to_OF_node(struct pci_dev *pdev);
#define HAVE_ARCH_PCI_RESOURCE_TO_USER #define HAVE_ARCH_PCI_RESOURCE_TO_USER
extern void pci_resource_to_user(const struct pci_dev *dev, int bar, extern void pci_resource_to_user(const struct pci_dev *dev, int bar,
const struct resource *rsrc, const struct resource *rsrc,

8
arch/sparc/kernel/pci.c
View File

@ -284,7 +284,7 @@ static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
dev->sysdata = node; dev->sysdata = node;
dev->dev.parent = bus->bridge; dev->dev.parent = bus->bridge;
dev->dev.bus = &pci_bus_type; dev->dev.bus = &pci_bus_type;
dev->dev.of_node = node; dev->dev.of_node = of_node_get(node);
dev->devfn = devfn; dev->devfn = devfn;
dev->multifunction = 0; /* maybe a lie? */ dev->multifunction = 0; /* maybe a lie? */
set_pcie_port_type(dev); set_pcie_port_type(dev);
@ -1021,12 +1021,6 @@ void arch_teardown_msi_irq(unsigned int irq)
} }
#endif /* !(CONFIG_PCI_MSI) */ #endif /* !(CONFIG_PCI_MSI) */
struct device_node *pci_device_to_OF_node(struct pci_dev *pdev)
{
return pdev->dev.of_node;
}
EXPORT_SYMBOL(pci_device_to_OF_node);
static void ali_sound_dma_hack(struct pci_dev *pdev, int set_bit) static void ali_sound_dma_hack(struct pci_dev *pdev, int set_bit)
{ {
struct pci_dev *ali_isa_bridge; struct pci_dev *ali_isa_bridge;

8
arch/sparc/kernel/pcic.c
View File

@ -885,14 +885,6 @@ int pcibios_assign_resource(struct pci_dev *pdev, int resource)
return -ENXIO; return -ENXIO;
} }
struct device_node *pci_device_to_OF_node(struct pci_dev *pdev)
{
struct pcidev_cookie *pc = pdev->sysdata;
return pc->prom_node;
}
EXPORT_SYMBOL(pci_device_to_OF_node);
/* /*
* This probably belongs here rather than ioport.c because * This probably belongs here rather than ioport.c because
* we do not want this crud linked into SBus kernels. * we do not want this crud linked into SBus kernels.

11
arch/x86/include/asm/prom.h
View File

@ -30,17 +30,6 @@ extern void add_dtb(u64 data);
extern void x86_add_irq_domains(void); extern void x86_add_irq_domains(void);
void __cpuinit x86_of_pci_init(void); void __cpuinit x86_of_pci_init(void);
void x86_dtb_init(void); void x86_dtb_init(void);
static inline struct device_node *pci_device_to_OF_node(struct pci_dev *pdev)
{
return pdev ? pdev->dev.of_node : NULL;
}
static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
{
return pci_device_to_OF_node(bus->self);
}
#else #else
static inline void add_dtb(u64 data) { } static inline void add_dtb(u64 data) { }
static inline void x86_add_irq_domains(void) { } static inline void x86_add_irq_domains(void) { }

60
arch/x86/kernel/devicetree.c
View File

@ -134,6 +134,24 @@ static int __init add_bus_probe(void)
module_init(add_bus_probe); module_init(add_bus_probe);
#ifdef CONFIG_PCI #ifdef CONFIG_PCI
struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
{
struct device_node *np;
for_each_node_by_type(np, "pci") {
const void *prop;
unsigned int bus_min;
prop = of_get_property(np, "bus-range", NULL);
if (!prop)
continue;
bus_min = be32_to_cpup(prop);
if (bus->number == bus_min)
return np;
}
return NULL;
}
static int x86_of_pci_irq_enable(struct pci_dev *dev) static int x86_of_pci_irq_enable(struct pci_dev *dev)
{ {
struct of_irq oirq; struct of_irq oirq;
@ -165,50 +183,8 @@ static void x86_of_pci_irq_disable(struct pci_dev *dev)
void __cpuinit x86_of_pci_init(void) void __cpuinit x86_of_pci_init(void)
{ {
struct device_node *np;
pcibios_enable_irq = x86_of_pci_irq_enable; pcibios_enable_irq = x86_of_pci_irq_enable;
pcibios_disable_irq = x86_of_pci_irq_disable; pcibios_disable_irq = x86_of_pci_irq_disable;
for_each_node_by_type(np, "pci") {
const void *prop;
struct pci_bus *bus;
unsigned int bus_min;
struct device_node *child;
prop = of_get_property(np, "bus-range", NULL);
if (!prop)
continue;
bus_min = be32_to_cpup(prop);
bus = pci_find_bus(0, bus_min);
if (!bus) {
printk(KERN_ERR "Can't find a node for bus %s.\n",
np->full_name);
continue;
}
if (bus->self)
bus->self->dev.of_node = np;
else
bus->dev.of_node = np;
for_each_child_of_node(np, child) {
struct pci_dev *dev;
u32 devfn;
prop = of_get_property(child, "reg", NULL);
if (!prop)
continue;
devfn = (be32_to_cpup(prop) >> 8) & 0xff;
dev = pci_get_slot(bus, devfn);
if (!dev)
continue;
dev->dev.of_node = child;
pci_dev_put(dev);
}
}
} }
#endif #endif

8
drivers/of/Kconfig
View File

@ -71,8 +71,14 @@ config OF_MDIO
config OF_PCI config OF_PCI
def_tristate PCI def_tristate PCI
depends on PCI && (PPC || MICROBLAZE || X86) depends on PCI
help help
OpenFirmware PCI bus accessors OpenFirmware PCI bus accessors
config OF_PCI_IRQ
def_tristate PCI
depends on OF_PCI && OF_IRQ
help
OpenFirmware PCI IRQ routing helpers
endmenu # OF endmenu # OF

1
drivers/of/Makefile
View File

@ -10,3 +10,4 @@ obj-$(CONFIG_OF_NET) += of_net.o
obj-$(CONFIG_OF_SPI) += of_spi.o obj-$(CONFIG_OF_SPI) += of_spi.o
obj-$(CONFIG_OF_MDIO) += of_mdio.o obj-$(CONFIG_OF_MDIO) += of_mdio.o
obj-$(CONFIG_OF_PCI) += of_pci.o obj-$(CONFIG_OF_PCI) += of_pci.o
obj-$(CONFIG_OF_PCI_IRQ) += of_pci_irq.o

118
drivers/of/of_pci.c
View File

@ -1,92 +1,40 @@
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/of_pci.h> #include <linux/of_pci.h>
#include <linux/of_irq.h>
#include <asm/prom.h> #include <asm/prom.h>
/** static inline int __of_pci_pci_compare(struct device_node *node,
* of_irq_map_pci - Resolve the interrupt for a PCI device unsigned int devfn)
* @pdev: the device whose interrupt is to be resolved
* @out_irq: structure of_irq filled by this function
*
* This function resolves the PCI interrupt for a given PCI device. If a
* device-node exists for a given pci_dev, it will use normal OF tree
* walking. If not, it will implement standard swizzling and walk up the
* PCI tree until an device-node is found, at which point it will finish
* resolving using the OF tree walking.
*/
int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
{ {
struct device_node *dn, *ppnode; unsigned int size;
struct pci_dev *ppdev; const __be32 *reg = of_get_property(node, "reg", &size);
u32 lspec;
__be32 lspec_be;
__be32 laddr[3];
u8 pin;
int rc;
/* Check if we have a device node, if yes, fallback to standard if (!reg || size < 5 * sizeof(__be32))
* device tree parsing return 0;
*/ return ((be32_to_cpup(&reg[0]) >> 8) & 0xff) == devfn;
dn = pci_device_to_OF_node(pdev);
if (dn) {
rc = of_irq_map_one(dn, 0, out_irq);
if (!rc)
return rc;
}
/* Ok, we don't, time to have fun. Let's start by building up an
* interrupt spec. we assume #interrupt-cells is 1, which is standard
* for PCI. If you do different, then don't use that routine.
*/
rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);
if (rc != 0)
return rc;
/* No pin, exit */
if (pin == 0)
return -ENODEV;
/* Now we walk up the PCI tree */
lspec = pin;
for (;;) {
/* Get the pci_dev of our parent */
ppdev = pdev->bus->self;
/* Ouch, it's a host bridge... */
if (ppdev == NULL) {
ppnode = pci_bus_to_OF_node(pdev->bus);
/* No node for host bridge ? give up */
if (ppnode == NULL)
return -EINVAL;
} else {
/* We found a P2P bridge, check if it has a node */
ppnode = pci_device_to_OF_node(ppdev);
}
/* Ok, we have found a parent with a device-node, hand over to
* the OF parsing code.
* We build a unit address from the linux device to be used for
* resolution. Note that we use the linux bus number which may
* not match your firmware bus numbering.
* Fortunately, in most cases, interrupt-map-mask doesn't
* include the bus number as part of the matching.
* You should still be careful about that though if you intend
* to rely on this function (you ship a firmware that doesn't
* create device nodes for all PCI devices).
*/
if (ppnode)
break;
/* We can only get here if we hit a P2P bridge with no node,
* let's do standard swizzling and try again
*/
lspec = pci_swizzle_interrupt_pin(pdev, lspec);
pdev = ppdev;
}
lspec_be = cpu_to_be32(lspec);
laddr[0] = cpu_to_be32((pdev->bus->number << 16) | (pdev->devfn << 8));
laddr[1] = laddr[2] = cpu_to_be32(0);
return of_irq_map_raw(ppnode, &lspec_be, 1, laddr, out_irq);
} }
EXPORT_SYMBOL_GPL(of_irq_map_pci);
struct device_node *of_pci_find_child_device(struct device_node *parent,
unsigned int devfn)
{
struct device_node *node, *node2;
for_each_child_of_node(parent, node) {
if (__of_pci_pci_compare(node, devfn))
return node;
/*
* Some OFs create a parent node "multifunc-device" as
* a fake root for all functions of a multi-function
* device we go down them as well.
*/
if (!strcmp(node->name, "multifunc-device")) {
for_each_child_of_node(node, node2) {
if (__of_pci_pci_compare(node2, devfn)) {
of_node_put(node);
return node2;
}
}
}
}
return NULL;
}
EXPORT_SYMBOL_GPL(of_pci_find_child_device);

92
drivers/of/of_pci_irq.c Normal file
View File

@ -0,0 +1,92 @@
#include <linux/kernel.h>
#include <linux/of_pci.h>
#include <linux/of_irq.h>
#include <asm/prom.h>
/**
* of_irq_map_pci - Resolve the interrupt for a PCI device
* @pdev: the device whose interrupt is to be resolved
* @out_irq: structure of_irq filled by this function
*
* This function resolves the PCI interrupt for a given PCI device. If a
* device-node exists for a given pci_dev, it will use normal OF tree
* walking. If not, it will implement standard swizzling and walk up the
* PCI tree until an device-node is found, at which point it will finish
* resolving using the OF tree walking.
*/
int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
{
struct device_node *dn, *ppnode;
struct pci_dev *ppdev;
u32 lspec;
__be32 lspec_be;
__be32 laddr[3];
u8 pin;
int rc;
/* Check if we have a device node, if yes, fallback to standard
* device tree parsing
*/
dn = pci_device_to_OF_node(pdev);
if (dn) {
rc = of_irq_map_one(dn, 0, out_irq);
if (!rc)
return rc;
}
/* Ok, we don't, time to have fun. Let's start by building up an
* interrupt spec. we assume #interrupt-cells is 1, which is standard
* for PCI. If you do different, then don't use that routine.
*/
rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);
if (rc != 0)
return rc;
/* No pin, exit */
if (pin == 0)
return -ENODEV;
/* Now we walk up the PCI tree */
lspec = pin;
for (;;) {
/* Get the pci_dev of our parent */
ppdev = pdev->bus->self;
/* Ouch, it's a host bridge... */
if (ppdev == NULL) {
ppnode = pci_bus_to_OF_node(pdev->bus);
/* No node for host bridge ? give up */
if (ppnode == NULL)
return -EINVAL;
} else {
/* We found a P2P bridge, check if it has a node */
ppnode = pci_device_to_OF_node(ppdev);
}
/* Ok, we have found a parent with a device-node, hand over to
* the OF parsing code.
* We build a unit address from the linux device to be used for
* resolution. Note that we use the linux bus number which may
* not match your firmware bus numbering.
* Fortunately, in most cases, interrupt-map-mask doesn't
* include the bus number as part of the matching.
* You should still be careful about that though if you intend
* to rely on this function (you ship a firmware that doesn't
* create device nodes for all PCI devices).
*/
if (ppnode)
break;
/* We can only get here if we hit a P2P bridge with no node,
* let's do standard swizzling and try again
*/
lspec = pci_swizzle_interrupt_pin(pdev, lspec);
pdev = ppdev;
}
lspec_be = cpu_to_be32(lspec);
laddr[0] = cpu_to_be32((pdev->bus->number << 16) | (pdev->devfn << 8));
laddr[1] = laddr[2] = cpu_to_be32(0);
return of_irq_map_raw(ppnode, &lspec_be, 1, laddr, out_irq);
}
EXPORT_SYMBOL_GPL(of_irq_map_pci);

2
drivers/pci/Makefile
View File

@ -71,4 +71,6 @@ obj-$(CONFIG_PCI_STUB) += pci-stub.o
obj-$(CONFIG_XEN_PCIDEV_FRONTEND) += xen-pcifront.o obj-$(CONFIG_XEN_PCIDEV_FRONTEND) += xen-pcifront.o
obj-$(CONFIG_OF) += of.o
ccflags-$(CONFIG_PCI_DEBUG) := -DDEBUG ccflags-$(CONFIG_PCI_DEBUG) := -DDEBUG

2
drivers/pci/hotplug/rpadlpar_core.c
View File

@ -158,7 +158,7 @@ static void dlpar_pci_add_bus(struct device_node *dn)
/* Scan below the new bridge */ /* Scan below the new bridge */
if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
of_scan_pci_bridge(dn, dev); of_scan_pci_bridge(dev);
/* Map IO space for child bus, which may or may not succeed */ /* Map IO space for child bus, which may or may not succeed */
pcibios_map_io_space(dev->subordinate); pcibios_map_io_space(dev->subordinate);

61
drivers/pci/of.c Normal file
View File

@ -0,0 +1,61 @@
/*
* PCI <-> OF mapping helpers
*
* Copyright 2011 IBM Corp.
*
* 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.
*/
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/of.h>
#include <linux/of_pci.h>
#include "pci.h"
void pci_set_of_node(struct pci_dev *dev)
{
if (!dev->bus->dev.of_node)
return;
dev->dev.of_node = of_pci_find_child_device(dev->bus->dev.of_node,
dev->devfn);
}
void pci_release_of_node(struct pci_dev *dev)
{
of_node_put(dev->dev.of_node);
dev->dev.of_node = NULL;
}
void pci_set_bus_of_node(struct pci_bus *bus)
{
if (bus->self == NULL)
bus->dev.of_node = pcibios_get_phb_of_node(bus);
else
bus->dev.of_node = of_node_get(bus->self->dev.of_node);
}
void pci_release_bus_of_node(struct pci_bus *bus)
{
of_node_put(bus->dev.of_node);
bus->dev.of_node = NULL;
}
struct device_node * __weak pcibios_get_phb_of_node(struct pci_bus *bus)
{
/* This should only be called for PHBs */
if (WARN_ON(bus->self || bus->parent))
return NULL;
/* Look for a node pointer in either the intermediary device we
* create above the root bus or it's own parent. Normally only
* the later is populated.
*/
if (bus->bridge->of_node)
return of_node_get(bus->bridge->of_node);
if (bus->bridge->parent->of_node)
return of_node_get(bus->bridge->parent->of_node);
return NULL;
}

7
drivers/pci/probe.c
View File

@ -52,6 +52,7 @@ static void release_pcibus_dev(struct device *dev)
if (pci_bus->bridge) if (pci_bus->bridge)
put_device(pci_bus->bridge); put_device(pci_bus->bridge);
pci_bus_remove_resources(pci_bus); pci_bus_remove_resources(pci_bus);
pci_release_bus_of_node(pci_bus);
kfree(pci_bus); kfree(pci_bus);
} }
@ -588,7 +589,7 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent,
child->self = bridge; child->self = bridge;
child->bridge = get_device(&bridge->dev); child->bridge = get_device(&bridge->dev);
pci_set_bus_of_node(child);
pci_set_bus_speed(child); pci_set_bus_speed(child);
/* Set up default resource pointers and names.. */ /* Set up default resource pointers and names.. */
@ -1038,6 +1039,7 @@ static void pci_release_dev(struct device *dev)
pci_dev = to_pci_dev(dev); pci_dev = to_pci_dev(dev);
pci_release_capabilities(pci_dev); pci_release_capabilities(pci_dev);
pci_release_of_node(pci_dev);
kfree(pci_dev); kfree(pci_dev);
} }
@ -1157,6 +1159,8 @@ static struct pci_dev *pci_scan_device(struct pci_bus *bus, int devfn)
dev->vendor = l & 0xffff; dev->vendor = l & 0xffff;
dev->device = (l >> 16) & 0xffff; dev->device = (l >> 16) & 0xffff;
pci_set_of_node(dev);
if (pci_setup_device(dev)) { if (pci_setup_device(dev)) {
kfree(dev); kfree(dev);
return NULL; return NULL;
@ -1409,6 +1413,7 @@ struct pci_bus * pci_create_bus(struct device *parent,
goto dev_reg_err; goto dev_reg_err;
b->bridge = get_device(dev); b->bridge = get_device(dev);
device_enable_async_suspend(b->bridge); device_enable_async_suspend(b->bridge);
pci_set_bus_of_node(b);
if (!parent) if (!parent)
set_dev_node(b->bridge, pcibus_to_node(b)); set_dev_node(b->bridge, pcibus_to_node(b));

5
include/linux/of_pci.h
View File

@ -6,4 +6,9 @@
struct pci_dev; struct pci_dev;
struct of_irq; struct of_irq;
int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq); int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
struct device_node;
struct device_node *of_pci_find_child_device(struct device_node *parent,
unsigned int devfn);
#endif #endif

28
include/linux/pci.h
View File

@ -1589,5 +1589,33 @@ int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);
int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off, int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
unsigned int len, const char *kw); unsigned int len, const char *kw);
/* PCI <-> OF binding helpers */
#ifdef CONFIG_OF
struct device_node;
extern void pci_set_of_node(struct pci_dev *dev);
extern void pci_release_of_node(struct pci_dev *dev);
extern void pci_set_bus_of_node(struct pci_bus *bus);
extern void pci_release_bus_of_node(struct pci_bus *bus);
/* Arch may override this (weak) */
extern struct device_node * __weak pcibios_get_phb_of_node(struct pci_bus *bus);
static inline struct device_node *pci_device_to_OF_node(struct pci_dev *pdev)
{
return pdev ? pdev->dev.of_node : NULL;
}
static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
{
return bus ? bus->dev.of_node : NULL;
}
#else /* CONFIG_OF */
static inline void pci_set_of_node(struct pci_dev *dev) { }
static inline void pci_release_of_node(struct pci_dev *dev) { }
static inline void pci_set_bus_of_node(struct pci_bus *bus) { }
static inline void pci_release_bus_of_node(struct pci_bus *bus) { }
#endif /* CONFIG_OF */
#endif /* __KERNEL__ */ #endif /* __KERNEL__ */
#endif /* LINUX_PCI_H */ #endif /* LINUX_PCI_H */