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[PATCH] powerpc: Update OF address parsers

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This updates the OF address parsers to return the IO flags
indicating the type of address obtained. It also adds a PCI
call for converting physical addresses that hit IO space into
into IO tokens, and add routines that return the translated
addresses into struct resource

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt 2005-11-30 16:57:28 +11:00 committed by Paul Mackerras
parent bb6b9b28d6
commit d2dd482bc1
10 changed files with 251 additions and 36 deletions
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5
arch/powerpc/kernel/legacy_serial.c
View File

@ -146,6 +146,7 @@ static int __init add_legacy_pci_port(struct device_node *np,
{
phys_addr_t addr, base;
u32 *addrp;
unsigned int flags;
int iotype, index = -1, lindex = 0;
/* We only support ports that have a clock frequency properly
@ -159,12 +160,12 @@ static int __init add_legacy_pci_port(struct device_node *np,
return -1;
/* Get the PCI address. Assume BAR 0 */
addrp = of_get_pci_address(pci_dev, 0, NULL);
addrp = of_get_pci_address(pci_dev, 0, NULL, &flags);
if (addrp == NULL)
return -1;
/* We only support BAR 0 for now */
iotype = (addrp[0] & 0x02000000) ? UPIO_MEM : UPIO_PORT;
iotype = (flags & IORESOURCE_MEM) ? UPIO_MEM : UPIO_PORT;
addr = of_translate_address(pci_dev, addrp);
/* Set the IO base to the same as the translated address for MMIO,

14
arch/powerpc/kernel/pci_64.c
View File

@ -1181,6 +1181,20 @@ void phbs_remap_io(void)
remap_bus_range(hose->bus);
}
unsigned int pci_address_to_pio(phys_addr_t address)
{
struct pci_controller *hose, *tmp;
list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
if (address >= hose->io_base_phys &&
address < (hose->io_base_phys + hose->pci_io_size))
return (unsigned int)hose->io_base_virt +
(address - hose->io_base_phys);
}
return (unsigned int)-1;
}
EXPORT_SYMBOL_GPL(pci_address_to_pio);
static void __devinit fixup_resource(struct resource *res, struct pci_dev *dev)
{
struct pci_controller *hose = pci_bus_to_host(dev->bus);

165
arch/powerpc/kernel/prom_parse.c
View File

@ -4,7 +4,9 @@
#include <linux/string.h>
#include <linux/pci_regs.h>
#include <linux/module.h>
#include <linux/ioport.h>
#include <asm/prom.h>
#include <asm/pci-bridge.h>
#ifdef DEBUG
#define DBG(fmt...) do { printk(fmt); } while(0)
@ -54,6 +56,7 @@ struct of_bus {
int *addrc, int *sizec);
u64 (*map)(u32 *addr, u32 *range, int na, int ns, int pna);
int (*translate)(u32 *addr, u64 offset, int na);
unsigned int (*get_flags)(u32 *addr);
};
@ -61,8 +64,8 @@ struct of_bus {
* Default translator (generic bus)
*/
static void of_default_count_cells(struct device_node *dev,
int *addrc, int *sizec)
static void of_bus_default_count_cells(struct device_node *dev,
int *addrc, int *sizec)
{
if (addrc)
*addrc = prom_n_addr_cells(dev);
@ -70,7 +73,7 @@ static void of_default_count_cells(struct device_node *dev,
*sizec = prom_n_size_cells(dev);
}
static u64 of_default_map(u32 *addr, u32 *range, int na, int ns, int pna)
static u64 of_bus_default_map(u32 *addr, u32 *range, int na, int ns, int pna)
{
u64 cp, s, da;
@ -86,7 +89,7 @@ static u64 of_default_map(u32 *addr, u32 *range, int na, int ns, int pna)
return da - cp;
}
static int of_default_translate(u32 *addr, u64 offset, int na)
static int of_bus_default_translate(u32 *addr, u64 offset, int na)
{
u64 a = of_read_addr(addr, na);
memset(addr, 0, na * 4);
@ -98,6 +101,11 @@ static int of_default_translate(u32 *addr, u64 offset, int na)
return 0;
}
static unsigned int of_bus_default_get_flags(u32 *addr)
{
return IORESOURCE_MEM;
}
/*
* PCI bus specific translator
@ -139,7 +147,24 @@ static u64 of_bus_pci_map(u32 *addr, u32 *range, int na, int ns, int pna)
static int of_bus_pci_translate(u32 *addr, u64 offset, int na)
{
return of_default_translate(addr + 1, offset, na - 1);
return of_bus_default_translate(addr + 1, offset, na - 1);
}
static unsigned int of_bus_pci_get_flags(u32 *addr)
{
unsigned int flags = 0;
u32 w = addr[0];
switch((w >> 24) & 0x03) {
case 0x01:
flags |= IORESOURCE_IO;
case 0x02: /* 32 bits */
case 0x03: /* 64 bits */
flags |= IORESOURCE_MEM;
}
if (w & 0x40000000)
flags |= IORESOURCE_PREFETCH;
return flags;
}
/*
@ -182,9 +207,22 @@ static u64 of_bus_isa_map(u32 *addr, u32 *range, int na, int ns, int pna)
static int of_bus_isa_translate(u32 *addr, u64 offset, int na)
{
return of_default_translate(addr + 1, offset, na - 1);
return of_bus_default_translate(addr + 1, offset, na - 1);
}
static unsigned int of_bus_isa_get_flags(u32 *addr)
{
unsigned int flags = 0;
u32 w = addr[0];
if (w & 1)
flags |= IORESOURCE_IO;
else
flags |= IORESOURCE_MEM;
return flags;
}
/*
* Array of bus specific translators
*/
@ -198,6 +236,7 @@ static struct of_bus of_busses[] = {
.count_cells = of_bus_pci_count_cells,
.map = of_bus_pci_map,
.translate = of_bus_pci_translate,
.get_flags = of_bus_pci_get_flags,
},
/* ISA */
{
@ -207,15 +246,17 @@ static struct of_bus of_busses[] = {
.count_cells = of_bus_isa_count_cells,
.map = of_bus_isa_map,
.translate = of_bus_isa_translate,
.get_flags = of_bus_isa_get_flags,
},
/* Default */
{
.name = "default",
.addresses = "reg",
.match = NULL,
.count_cells = of_default_count_cells,
.map = of_default_map,
.translate = of_default_translate,
.count_cells = of_bus_default_count_cells,
.map = of_bus_default_map,
.translate = of_bus_default_translate,
.get_flags = of_bus_default_get_flags,
},
};
@ -254,7 +295,8 @@ static int of_translate_one(struct device_node *parent, struct of_bus *bus,
ranges = (u32 *)get_property(parent, "ranges", &rlen);
if (ranges == NULL || rlen == 0) {
offset = of_read_addr(addr, na);
memset(addr, 0, pna);
memset(addr, 0, pna * 4);
DBG("OF: no ranges, 1:1 translation\n");
goto finish;
}
@ -370,7 +412,8 @@ u64 of_translate_address(struct device_node *dev, u32 *in_addr)
}
EXPORT_SYMBOL(of_translate_address);
u32 *of_get_address(struct device_node *dev, int index, u64 *size)
u32 *of_get_address(struct device_node *dev, int index, u64 *size,
unsigned int *flags)
{
u32 *prop;
unsigned int psize;
@ -399,22 +442,106 @@ u32 *of_get_address(struct device_node *dev, int index, u64 *size)
if (i == index) {
if (size)
*size = of_read_addr(prop + na, ns);
if (flags)
*flags = bus->get_flags(prop);
return prop;
}
return NULL;
}
EXPORT_SYMBOL(of_get_address);
u32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size)
u32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size,
unsigned int *flags)
{
u32 *addr;
int index;
u32 *prop;
unsigned int psize;
struct device_node *parent;
struct of_bus *bus;
int onesize, i, na, ns;
for (index = 0; (addr = of_get_address(dev, index, size)) != NULL;
index++) {
if ((addr[0] & 0xff) == ((bar_no * 4) + PCI_BASE_ADDRESS_0))
return addr;
}
/* Get parent & match bus type */
parent = of_get_parent(dev);
if (parent == NULL)
return NULL;
bus = of_match_bus(parent);
if (strcmp(bus->name, "pci"))
return NULL;
bus->count_cells(dev, &na, &ns);
of_node_put(parent);
if (!OF_CHECK_COUNTS(na, ns))
return NULL;
/* Get "reg" or "assigned-addresses" property */
prop = (u32 *)get_property(dev, bus->addresses, &psize);
if (prop == NULL)
return NULL;
psize /= 4;
onesize = na + ns;
for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++)
if ((prop[0] & 0xff) == ((bar_no * 4) + PCI_BASE_ADDRESS_0)) {
if (size)
*size = of_read_addr(prop + na, ns);
if (flags)
*flags = bus->get_flags(prop);
return prop;
}
return NULL;
}
EXPORT_SYMBOL(of_get_pci_address);
static int __of_address_to_resource(struct device_node *dev, u32 *addrp,
u64 size, unsigned int flags,
struct resource *r)
{
u64 taddr;
if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0)
return -EINVAL;
taddr = of_translate_address(dev, addrp);
if (taddr == OF_BAD_ADDR)
return -EINVAL;
memset(r, 0, sizeof(struct resource));
if (flags & IORESOURCE_IO) {
unsigned int port;
port = pci_address_to_pio(taddr);
if (port == (unsigned int)-1)
return -EINVAL;
r->start = port;
r->end = port + size - 1;
} else {
r->start = taddr;
r->end = taddr + size - 1;
}
r->flags = flags;
r->name = dev->name;
return 0;
}
int of_address_to_resource(struct device_node *dev, int index,
struct resource *r)
{
u32 *addrp;
u64 size;
unsigned int flags;
addrp = of_get_address(dev, index, &size, &flags);
if (addrp == NULL)
return -EINVAL;
return __of_address_to_resource(dev, addrp, size, flags, r);
}
EXPORT_SYMBOL_GPL(of_address_to_resource);
int of_pci_address_to_resource(struct device_node *dev, int bar,
struct resource *r)
{
u32 *addrp;
u64 size;
unsigned int flags;
addrp = of_get_pci_address(dev, bar, &size, &flags);
if (addrp == NULL)
return -EINVAL;
return __of_address_to_resource(dev, addrp, size, flags, r);
}
EXPORT_SYMBOL_GPL(of_pci_address_to_resource);

2
arch/powerpc/platforms/powermac/feature.c
View File

@ -2683,7 +2683,7 @@ static void __init probe_one_macio(const char *name, const char *compat, int typ
printk(KERN_ERR "pmac_feature: %s skipped\n", node->full_name);
return;
}
addrp = of_get_pci_address(node, 0, &size);
addrp = of_get_pci_address(node, 0, &size, NULL);
if (addrp == NULL) {
printk(KERN_ERR "pmac_feature: %s: can't find base !\n",
node->full_name);

15
arch/ppc/kernel/pci.c
View File

@ -1805,6 +1805,21 @@ void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
EXPORT_SYMBOL(pci_iomap);
EXPORT_SYMBOL(pci_iounmap);
unsigned int pci_address_to_pio(phys_addr_t address)
{
struct pci_controller* hose = hose_head;
for (; hose; hose = hose->next) {
unsigned int size = hose->io_resource.end -
hose->io_resource.start + 1;
if (address >= hose->io_base_phys &&
address < (hose->io_base_phys + size))
return (unsigned int)hose->io_base_virt +
(address - hose->io_base_phys);
}
return (unsigned int)-1;
}
EXPORT_SYMBOL(pci_address_to_pio);
/*
* Null PCI config access functions, for the case when we can't

12
drivers/macintosh/macio_asic.c
View File

@ -332,18 +332,14 @@ static void macio_setup_resources(struct macio_dev *dev,
struct resource *parent_res)
{
struct device_node *np = dev->ofdev.node;
u32 *addr;
u64 size;
struct resource r;
int index;
for (index = 0; (addr = of_get_address(np, index, &size)) != NULL;
index++) {
for (index = 0; of_address_to_resource(np, index, &r) == 0; index++) {
struct resource *res = &dev->resource[index];
if (index >= MACIO_DEV_COUNT_RESOURCES)
break;
res->start = of_translate_address(np, addr);
res->end = res->start + (unsigned long)size - 1;
res->flags = IORESOURCE_MEM;
*res = r;
res->name = dev->ofdev.dev.bus_id;
if (macio_resource_quirks(np, res, index)) {
@ -353,7 +349,7 @@ static void macio_setup_resources(struct macio_dev *dev,
/* Currently, we consider failure as harmless, this may
* change in the future, once I've found all the device
* tree bugs in older machines & worked around them
*/
l */
if (insert_resource(parent_res, res)) {
printk(KERN_WARNING "Can't request resource "
"%d for MacIO device %s\n",

9
include/asm-powerpc/pci-bridge.h
View File

@ -156,6 +156,15 @@ extern struct pci_controller *
pcibios_alloc_controller(struct device_node *dev);
extern void pcibios_free_controller(struct pci_controller *phb);
#ifdef CONFIG_PCI
extern unsigned int pci_address_to_pio(phys_addr_t address);
#else
static inline unsigned int pci_address_to_pio(phys_addr_t address)
{
return (unsigned int)-1;
}
#endif
/* Return values for ppc_md.pci_probe_mode function */
#define PCI_PROBE_NONE -1 /* Don't look at this bus at all */
#define PCI_PROBE_NORMAL 0 /* Do normal PCI probing */

28
include/asm-powerpc/prom.h
View File

@ -223,14 +223,36 @@ extern struct resource *request_OF_resource(struct device_node* node,
int index, const char* name_postfix);
extern int release_OF_resource(struct device_node* node, int index);
/*
* Address translation function(s)
* OF address retreival & translation
*/
/* Translate an OF address block into a CPU physical address
*/
#define OF_BAD_ADDR ((u64)-1)
extern u64 of_translate_address(struct device_node *np, u32 *addr);
extern u32 *of_get_address(struct device_node *dev, int index, u64 *size);
extern u32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size);
/* Extract an address from a device, returns the region size and
* the address space flags too. The PCI version uses a BAR number
* instead of an absolute index
*/
extern u32 *of_get_address(struct device_node *dev, int index,
u64 *size, unsigned int *flags);
extern u32 *of_get_pci_address(struct device_node *dev, int bar_no,
u64 *size, unsigned int *flags);
/* Get an address as a resource. Note that if your address is
* a PIO address, the conversion will fail if the physical address
* can't be internally converted to an IO token with
* pci_address_to_pio(), that is because it's either called to early
* or it can't be matched to any host bridge IO space
*/
extern int of_address_to_resource(struct device_node *dev, int index,
struct resource *r);
extern int of_pci_address_to_resource(struct device_node *dev, int bar,
struct resource *r);
#endif /* __KERNEL__ */
#endif /* _POWERPC_PROM_H */

9
include/asm-ppc/pci-bridge.h
View File

@ -137,5 +137,14 @@ static inline unsigned char bridge_swizzle(unsigned char pin,
*/
extern int pciauto_bus_scan(struct pci_controller *, int);
#ifdef CONFIG_PCI
extern unsigned int pci_address_to_pio(phys_addr_t address);
#else
static inline unsigned int pci_address_to_pio(phys_addr_t address)
{
return (unsigned int)-1;
}
#endif
#endif
#endif /* __KERNEL__ */

28
include/asm-ppc/prom.h
View File

@ -138,12 +138,34 @@ extern unsigned long sub_reloc_offset(unsigned long);
/*
* Address translation function(s)
* OF address retreival & translation
*/
/* Translate an OF address block into a CPU physical address
*/
#define OF_BAD_ADDR ((u64)-1)
extern u64 of_translate_address(struct device_node *np, u32 *addr);
extern u32 *of_get_address(struct device_node *dev, int index, u64 *size);
extern u32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size);
/* Extract an address from a device, returns the region size and
* the address space flags too. The PCI version uses a BAR number
* instead of an absolute index
*/
extern u32 *of_get_address(struct device_node *dev, int index,
u64 *size, unsigned int *flags);
extern u32 *of_get_pci_address(struct device_node *dev, int bar_no,
u64 *size, unsigned int *flags);
/* Get an address as a resource. Note that if your address is
* a PIO address, the conversion will fail if the physical address
* can't be internally converted to an IO token with
* pci_address_to_pio(), that is because it's either called to early
* or it can't be matched to any host bridge IO space
*/
extern int of_address_to_resource(struct device_node *dev, int index,
struct resource *r);
extern int of_pci_address_to_resource(struct device_node *dev, int bar,
struct resource *r);
#endif /* _PPC_PROM_H */