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linux/arch/parisc/lib/iomap.c
Benjamin Herrenschmidt b70d3a2c59 iomap: fix 64 bits resources on 32 bits 
Almost all implementations of pci_iomap() in the kernel, including the generic
lib/iomap.c one, copies the content of a struct resource into unsigned long's
which will break on 32 bits platforms with 64 bits resources.

This fixes all definitions of pci_iomap() to use resource_size_t.  I also
"fixed" the 64bits arch for consistency.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29 08:06:02 -07:00

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/*
* iomap.c - Implement iomap interface for PA-RISC
* Copyright (c) 2004 Matthew Wilcox
*/
#include <linux/ioport.h>
#include <linux/pci.h>
#include <asm/io.h>
/*
* The iomap space on 32-bit PA-RISC is intended to look like this:
* 00000000-7fffffff virtual mapped IO
* 80000000-8fffffff ISA/EISA port space that can't be virtually mapped
* 90000000-9fffffff Dino port space
* a0000000-afffffff Astro port space
* b0000000-bfffffff PAT port space
* c0000000-cfffffff non-swapped memory IO
* f0000000-ffffffff legacy IO memory pointers
*
* For the moment, here's what it looks like:
* 80000000-8fffffff All ISA/EISA port space
* f0000000-ffffffff legacy IO memory pointers
*
* On 64-bit, everything is extended, so:
* 8000000000000000-8fffffffffffffff All ISA/EISA port space
* f000000000000000-ffffffffffffffff legacy IO memory pointers
*/
/*
* Technically, this should be 'if (VMALLOC_START < addr < VMALLOC_END),
* but that's slow and we know it'll be within the first 2GB.
*/
#ifdef CONFIG_64BIT
#define INDIRECT_ADDR(addr) (((unsigned long)(addr) & 1UL<<63) != 0)
#define ADDR_TO_REGION(addr) (((unsigned long)addr >> 60) & 7)
#define IOPORT_MAP_BASE (8UL << 60)
#else
#define INDIRECT_ADDR(addr) (((unsigned long)(addr) & 1UL<<31) != 0)
#define ADDR_TO_REGION(addr) (((unsigned long)addr >> 28) & 7)
#define IOPORT_MAP_BASE (8UL << 28)
#endif
struct iomap_ops {
unsigned int (*read8)(void __iomem *);
unsigned int (*read16)(void __iomem *);
unsigned int (*read16be)(void __iomem *);
unsigned int (*read32)(void __iomem *);
unsigned int (*read32be)(void __iomem *);
void (*write8)(u8, void __iomem *);
void (*write16)(u16, void __iomem *);
void (*write16be)(u16, void __iomem *);
void (*write32)(u32, void __iomem *);
void (*write32be)(u32, void __iomem *);
void (*read8r)(void __iomem *, void *, unsigned long);
void (*read16r)(void __iomem *, void *, unsigned long);
void (*read32r)(void __iomem *, void *, unsigned long);
void (*write8r)(void __iomem *, const void *, unsigned long);
void (*write16r)(void __iomem *, const void *, unsigned long);
void (*write32r)(void __iomem *, const void *, unsigned long);
};
/* Generic ioport ops. To be replaced later by specific dino/elroy/wax code */
#define ADDR2PORT(addr) ((unsigned long __force)(addr) & 0xffffff)
static unsigned int ioport_read8(void __iomem *addr)
{
return inb(ADDR2PORT(addr));
}
static unsigned int ioport_read16(void __iomem *addr)
{
return inw(ADDR2PORT(addr));
}
static unsigned int ioport_read32(void __iomem *addr)
{
return inl(ADDR2PORT(addr));
}
static void ioport_write8(u8 datum, void __iomem *addr)
{
outb(datum, ADDR2PORT(addr));
}
static void ioport_write16(u16 datum, void __iomem *addr)
{
outw(datum, ADDR2PORT(addr));
}
static void ioport_write32(u32 datum, void __iomem *addr)
{
outl(datum, ADDR2PORT(addr));
}
static void ioport_read8r(void __iomem *addr, void *dst, unsigned long count)
{
insb(ADDR2PORT(addr), dst, count);
}
static void ioport_read16r(void __iomem *addr, void *dst, unsigned long count)
{
insw(ADDR2PORT(addr), dst, count);
}
static void ioport_read32r(void __iomem *addr, void *dst, unsigned long count)
{
insl(ADDR2PORT(addr), dst, count);
}
static void ioport_write8r(void __iomem *addr, const void *s, unsigned long n)
{
outsb(ADDR2PORT(addr), s, n);
}
static void ioport_write16r(void __iomem *addr, const void *s, unsigned long n)
{
outsw(ADDR2PORT(addr), s, n);
}
static void ioport_write32r(void __iomem *addr, const void *s, unsigned long n)
{
outsl(ADDR2PORT(addr), s, n);
}
static const struct iomap_ops ioport_ops = {
ioport_read8,
ioport_read16,
ioport_read16,
ioport_read32,
ioport_read32,
ioport_write8,
ioport_write16,
ioport_write16,
ioport_write32,
ioport_write32,
ioport_read8r,
ioport_read16r,
ioport_read32r,
ioport_write8r,
ioport_write16r,
ioport_write32r,
};
/* Legacy I/O memory ops */
static unsigned int iomem_read8(void __iomem *addr)
{
return readb(addr);
}
static unsigned int iomem_read16(void __iomem *addr)
{
return readw(addr);
}
static unsigned int iomem_read16be(void __iomem *addr)
{
return __raw_readw(addr);
}
static unsigned int iomem_read32(void __iomem *addr)
{
return readl(addr);
}
static unsigned int iomem_read32be(void __iomem *addr)
{
return __raw_readl(addr);
}
static void iomem_write8(u8 datum, void __iomem *addr)
{
writeb(datum, addr);
}
static void iomem_write16(u16 datum, void __iomem *addr)
{
writew(datum, addr);
}
static void iomem_write16be(u16 datum, void __iomem *addr)
{
__raw_writew(datum, addr);
}
static void iomem_write32(u32 datum, void __iomem *addr)
{
writel(datum, addr);
}
static void iomem_write32be(u32 datum, void __iomem *addr)
{
__raw_writel(datum, addr);
}
static void iomem_read8r(void __iomem *addr, void *dst, unsigned long count)
{
while (count--) {
*(u8 *)dst = __raw_readb(addr);
dst++;
}
}
static void iomem_read16r(void __iomem *addr, void *dst, unsigned long count)
{
while (count--) {
*(u16 *)dst = __raw_readw(addr);
dst += 2;
}
}
static void iomem_read32r(void __iomem *addr, void *dst, unsigned long count)
{
while (count--) {
*(u32 *)dst = __raw_readl(addr);
dst += 4;
}
}
static void iomem_write8r(void __iomem *addr, const void *s, unsigned long n)
{
while (n--) {
__raw_writeb(*(u8 *)s, addr);
s++;
}
}
static void iomem_write16r(void __iomem *addr, const void *s, unsigned long n)
{
while (n--) {
__raw_writew(*(u16 *)s, addr);
s += 2;
}
}
static void iomem_write32r(void __iomem *addr, const void *s, unsigned long n)
{
while (n--) {
__raw_writel(*(u32 *)s, addr);
s += 4;
}
}
static const struct iomap_ops iomem_ops = {
iomem_read8,
iomem_read16,
iomem_read16be,
iomem_read32,
iomem_read32be,
iomem_write8,
iomem_write16,
iomem_write16be,
iomem_write32,
iomem_write32be,
iomem_read8r,
iomem_read16r,
iomem_read32r,
iomem_write8r,
iomem_write16r,
iomem_write32r,
};
const struct iomap_ops *iomap_ops[8] = {
[0] = &ioport_ops,
[7] = &iomem_ops
};
unsigned int ioread8(void __iomem *addr)
{
if (unlikely(INDIRECT_ADDR(addr)))
return iomap_ops[ADDR_TO_REGION(addr)]->read8(addr);
return *((u8 *)addr);
}
unsigned int ioread16(void __iomem *addr)
{
if (unlikely(INDIRECT_ADDR(addr)))
return iomap_ops[ADDR_TO_REGION(addr)]->read16(addr);
return le16_to_cpup((u16 *)addr);
}
unsigned int ioread16be(void __iomem *addr)
{
if (unlikely(INDIRECT_ADDR(addr)))
return iomap_ops[ADDR_TO_REGION(addr)]->read16be(addr);
return *((u16 *)addr);
}
unsigned int ioread32(void __iomem *addr)
{
if (unlikely(INDIRECT_ADDR(addr)))
return iomap_ops[ADDR_TO_REGION(addr)]->read32(addr);
return le32_to_cpup((u32 *)addr);
}
unsigned int ioread32be(void __iomem *addr)
{
if (unlikely(INDIRECT_ADDR(addr)))
return iomap_ops[ADDR_TO_REGION(addr)]->read32be(addr);
return *((u32 *)addr);
}
void iowrite8(u8 datum, void __iomem *addr)
{
if (unlikely(INDIRECT_ADDR(addr))) {
iomap_ops[ADDR_TO_REGION(addr)]->write8(datum, addr);
} else {
*((u8 *)addr) = datum;
}
}
void iowrite16(u16 datum, void __iomem *addr)
{
if (unlikely(INDIRECT_ADDR(addr))) {
iomap_ops[ADDR_TO_REGION(addr)]->write16(datum, addr);
} else {
*((u16 *)addr) = cpu_to_le16(datum);
}
}
void iowrite16be(u16 datum, void __iomem *addr)
{
if (unlikely(INDIRECT_ADDR(addr))) {
iomap_ops[ADDR_TO_REGION(addr)]->write16be(datum, addr);
} else {
*((u16 *)addr) = datum;
}
}
void iowrite32(u32 datum, void __iomem *addr)
{
if (unlikely(INDIRECT_ADDR(addr))) {
iomap_ops[ADDR_TO_REGION(addr)]->write32(datum, addr);
} else {
*((u32 *)addr) = cpu_to_le32(datum);
}
}
void iowrite32be(u32 datum, void __iomem *addr)
{
if (unlikely(INDIRECT_ADDR(addr))) {
iomap_ops[ADDR_TO_REGION(addr)]->write32be(datum, addr);
} else {
*((u32 *)addr) = datum;
}
}
/* Repeating interfaces */
void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
{
if (unlikely(INDIRECT_ADDR(addr))) {
iomap_ops[ADDR_TO_REGION(addr)]->read8r(addr, dst, count);
} else {
while (count--) {
*(u8 *)dst = *(u8 *)addr;
dst++;
}
}
}
void ioread16_rep(void __iomem *addr, void *dst, unsigned long count)
{
if (unlikely(INDIRECT_ADDR(addr))) {
iomap_ops[ADDR_TO_REGION(addr)]->read16r(addr, dst, count);
} else {
while (count--) {
*(u16 *)dst = *(u16 *)addr;
dst += 2;
}
}
}
void ioread32_rep(void __iomem *addr, void *dst, unsigned long count)
{
if (unlikely(INDIRECT_ADDR(addr))) {
iomap_ops[ADDR_TO_REGION(addr)]->read32r(addr, dst, count);
} else {
while (count--) {
*(u32 *)dst = *(u32 *)addr;
dst += 4;
}
}
}
void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
{
if (unlikely(INDIRECT_ADDR(addr))) {
iomap_ops[ADDR_TO_REGION(addr)]->write8r(addr, src, count);
} else {
while (count--) {
*(u8 *)addr = *(u8 *)src;
src++;
}
}
}
void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
{
if (unlikely(INDIRECT_ADDR(addr))) {
iomap_ops[ADDR_TO_REGION(addr)]->write16r(addr, src, count);
} else {
while (count--) {
*(u16 *)addr = *(u16 *)src;
src += 2;
}
}
}
void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
{
if (unlikely(INDIRECT_ADDR(addr))) {
iomap_ops[ADDR_TO_REGION(addr)]->write32r(addr, src, count);
} else {
while (count--) {
*(u32 *)addr = *(u32 *)src;
src += 4;
}
}
}
/* Mapping interfaces */
void __iomem *ioport_map(unsigned long port, unsigned int nr)
{
return (void __iomem *)(IOPORT_MAP_BASE | port);
}
void ioport_unmap(void __iomem *addr)
{
if (!INDIRECT_ADDR(addr)) {
iounmap(addr);
}
}
/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
{
resource_size_t start = pci_resource_start(dev, bar);
resource_size_t len = pci_resource_len(dev, bar);
unsigned long flags = pci_resource_flags(dev, bar);
if (!len || !start)
return NULL;
if (maxlen && len > maxlen)
len = maxlen;
if (flags & IORESOURCE_IO)
return ioport_map(start, len);
if (flags & IORESOURCE_MEM) {
if (flags & IORESOURCE_CACHEABLE)
return ioremap(start, len);
return ioremap_nocache(start, len);
}
/* What? */
return NULL;
}
void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
{
if (!INDIRECT_ADDR(addr)) {
iounmap(addr);
}
}
EXPORT_SYMBOL(ioread8);
EXPORT_SYMBOL(ioread16);
EXPORT_SYMBOL(ioread16be);
EXPORT_SYMBOL(ioread32);
EXPORT_SYMBOL(ioread32be);
EXPORT_SYMBOL(iowrite8);
EXPORT_SYMBOL(iowrite16);
EXPORT_SYMBOL(iowrite16be);
EXPORT_SYMBOL(iowrite32);
EXPORT_SYMBOL(iowrite32be);
EXPORT_SYMBOL(ioread8_rep);
EXPORT_SYMBOL(ioread16_rep);
EXPORT_SYMBOL(ioread32_rep);
EXPORT_SYMBOL(iowrite8_rep);
EXPORT_SYMBOL(iowrite16_rep);
EXPORT_SYMBOL(iowrite32_rep);
EXPORT_SYMBOL(ioport_map);
EXPORT_SYMBOL(ioport_unmap);
EXPORT_SYMBOL(pci_iomap);
EXPORT_SYMBOL(pci_iounmap);
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