X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fiomap.c;h=37a3ea4cac9f1c0a35c3e73430a5b28814f28d82;hb=4880d10927c93d858d40e297361fff375ee98492;hp=d6ccdd85df5311a4326bf584920a1293dc11243c;hpb=9cdf083f981b8d37b3212400a359368661385099;p=linux-2.6 diff --git a/lib/iomap.c b/lib/iomap.c index d6ccdd85df..37a3ea4cac 100644 --- a/lib/iomap.c +++ b/lib/iomap.c @@ -4,8 +4,9 @@ * (C) Copyright 2004 Linus Torvalds */ #include +#include + #include -#include /* * Read/write from/to an (offsettable) iomem cookie. It might be a PIO @@ -34,20 +35,28 @@ #define PIO_RESERVED 0x40000UL #endif +static void bad_io_access(unsigned long port, const char *access) +{ + static int count = 10; + if (count) { + count--; + printk(KERN_ERR "Bad IO access at port %#lx (%s)\n", port, access); + WARN_ON(1); + } +} + /* * Ugly macros are a way of life. */ -#define VERIFY_PIO(port) BUG_ON((port & ~PIO_MASK) != PIO_OFFSET) - #define IO_COND(addr, is_pio, is_mmio) do { \ unsigned long port = (unsigned long __force)addr; \ - if (port < PIO_RESERVED) { \ - VERIFY_PIO(port); \ + if (port >= PIO_RESERVED) { \ + is_mmio; \ + } else if (port > PIO_OFFSET) { \ port &= PIO_MASK; \ is_pio; \ - } else { \ - is_mmio; \ - } \ + } else \ + bad_io_access(port, #is_pio ); \ } while (0) #ifndef pio_read16be @@ -60,25 +69,30 @@ #define mmio_read32be(addr) be32_to_cpu(__raw_readl(addr)) #endif -unsigned int fastcall ioread8(void __iomem *addr) +unsigned int ioread8(void __iomem *addr) { IO_COND(addr, return inb(port), return readb(addr)); + return 0xff; } -unsigned int fastcall ioread16(void __iomem *addr) +unsigned int ioread16(void __iomem *addr) { IO_COND(addr, return inw(port), return readw(addr)); + return 0xffff; } -unsigned int fastcall ioread16be(void __iomem *addr) +unsigned int ioread16be(void __iomem *addr) { IO_COND(addr, return pio_read16be(port), return mmio_read16be(addr)); + return 0xffff; } -unsigned int fastcall ioread32(void __iomem *addr) +unsigned int ioread32(void __iomem *addr) { IO_COND(addr, return inl(port), return readl(addr)); + return 0xffffffff; } -unsigned int fastcall ioread32be(void __iomem *addr) +unsigned int ioread32be(void __iomem *addr) { IO_COND(addr, return pio_read32be(port), return mmio_read32be(addr)); + return 0xffffffff; } EXPORT_SYMBOL(ioread8); EXPORT_SYMBOL(ioread16); @@ -96,23 +110,23 @@ EXPORT_SYMBOL(ioread32be); #define mmio_write32be(val,port) __raw_writel(be32_to_cpu(val),port) #endif -void fastcall iowrite8(u8 val, void __iomem *addr) +void iowrite8(u8 val, void __iomem *addr) { IO_COND(addr, outb(val,port), writeb(val, addr)); } -void fastcall iowrite16(u16 val, void __iomem *addr) +void iowrite16(u16 val, void __iomem *addr) { IO_COND(addr, outw(val,port), writew(val, addr)); } -void fastcall iowrite16be(u16 val, void __iomem *addr) +void iowrite16be(u16 val, void __iomem *addr) { IO_COND(addr, pio_write16be(val,port), mmio_write16be(val, addr)); } -void fastcall iowrite32(u32 val, void __iomem *addr) +void iowrite32(u32 val, void __iomem *addr) { IO_COND(addr, outl(val,port), writel(val, addr)); } -void fastcall iowrite32be(u32 val, void __iomem *addr) +void iowrite32be(u32 val, void __iomem *addr) { IO_COND(addr, pio_write32be(val,port), mmio_write32be(val, addr)); } @@ -179,15 +193,15 @@ static inline void mmio_outsl(void __iomem *addr, const u32 *src, int count) } #endif -void fastcall ioread8_rep(void __iomem *addr, void *dst, unsigned long count) +void ioread8_rep(void __iomem *addr, void *dst, unsigned long count) { IO_COND(addr, insb(port,dst,count), mmio_insb(addr, dst, count)); } -void fastcall ioread16_rep(void __iomem *addr, void *dst, unsigned long count) +void ioread16_rep(void __iomem *addr, void *dst, unsigned long count) { IO_COND(addr, insw(port,dst,count), mmio_insw(addr, dst, count)); } -void fastcall ioread32_rep(void __iomem *addr, void *dst, unsigned long count) +void ioread32_rep(void __iomem *addr, void *dst, unsigned long count) { IO_COND(addr, insl(port,dst,count), mmio_insl(addr, dst, count)); } @@ -195,15 +209,15 @@ EXPORT_SYMBOL(ioread8_rep); EXPORT_SYMBOL(ioread16_rep); EXPORT_SYMBOL(ioread32_rep); -void fastcall iowrite8_rep(void __iomem *addr, const void *src, unsigned long count) +void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count) { IO_COND(addr, outsb(port, src, count), mmio_outsb(addr, src, count)); } -void fastcall iowrite16_rep(void __iomem *addr, const void *src, unsigned long count) +void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count) { IO_COND(addr, outsw(port, src, count), mmio_outsw(addr, src, count)); } -void fastcall iowrite32_rep(void __iomem *addr, const void *src, unsigned long count) +void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count) { IO_COND(addr, outsl(port, src,count), mmio_outsl(addr, src, count)); } @@ -226,11 +240,24 @@ void ioport_unmap(void __iomem *addr) EXPORT_SYMBOL(ioport_map); EXPORT_SYMBOL(ioport_unmap); -/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */ +/** + * pci_iomap - create a virtual mapping cookie for a PCI BAR + * @dev: PCI device that owns the BAR + * @bar: BAR number + * @maxlen: length of the memory to map + * + * Using this function you will get a __iomem address to your device BAR. + * You can access it using ioread*() and iowrite*(). These functions hide + * the details if this is a MMIO or PIO address space and will just do what + * you expect from them in the correct way. + * + * @maxlen specifies the maximum length to map. If you want to get access to + * the complete BAR without checking for its length first, pass %0 here. + * */ void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) { - unsigned long start = pci_resource_start(dev, bar); - unsigned long len = pci_resource_len(dev, bar); + 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)