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9caea00076
Linus noticed odd declaration rules for pci_iounmap() in iomap.h and
pci_iomap.h, where it dependend on either NO_GENERIC_PCI_IOPORT_MAP or
GENERIC_IOMAP when CONFIG_PCI was disabled.
Testing on parisc seems to indicate that we need pci_iounmap() only when
CONFIG_PCI is enabled, so the declaration of pci_iounmap() can be moved
cleanly into pci_iomap.h in sync with the declarations of pci_iomap().
Link: https://lore.kernel.org/all/CAHk-=wjRrh98pZoQ+AzfWmsTZacWxTJKXZ9eKU2X_0+jM=O8nw@mail.gmail.com/
Signed-off-by: Helge Deller <deller@gmx.de>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Fixes: 97a29d59fc ("[PARISC] fix compile break caused by iomap: make IOPORT/PCI mapping functions conditional")
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Ulrich Teichert <krypton@ulrich-teichert.org>
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
116 lines
3.9 KiB
C
116 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __GENERIC_IO_H
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#define __GENERIC_IO_H
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#include <linux/linkage.h>
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#include <asm/byteorder.h>
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/*
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* These are the "generic" interfaces for doing new-style
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* memory-mapped or PIO accesses. Architectures may do
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* their own arch-optimized versions, these just act as
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* wrappers around the old-style IO register access functions:
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* read[bwl]/write[bwl]/in[bwl]/out[bwl]
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*
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* Don't include this directly, include it from <asm/io.h>.
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*/
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/*
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* Read/write from/to an (offsettable) iomem cookie. It might be a PIO
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* access or a MMIO access, these functions don't care. The info is
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* encoded in the hardware mapping set up by the mapping functions
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* (or the cookie itself, depending on implementation and hw).
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*
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* The generic routines just encode the PIO/MMIO as part of the
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* cookie, and coldly assume that the MMIO IO mappings are not
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* in the low address range. Architectures for which this is not
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* true can't use this generic implementation.
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*/
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extern unsigned int ioread8(const void __iomem *);
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extern unsigned int ioread16(const void __iomem *);
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extern unsigned int ioread16be(const void __iomem *);
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extern unsigned int ioread32(const void __iomem *);
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extern unsigned int ioread32be(const void __iomem *);
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#ifdef CONFIG_64BIT
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extern u64 ioread64(const void __iomem *);
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extern u64 ioread64be(const void __iomem *);
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#endif
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#ifdef readq
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#define ioread64_lo_hi ioread64_lo_hi
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#define ioread64_hi_lo ioread64_hi_lo
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#define ioread64be_lo_hi ioread64be_lo_hi
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#define ioread64be_hi_lo ioread64be_hi_lo
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extern u64 ioread64_lo_hi(const void __iomem *addr);
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extern u64 ioread64_hi_lo(const void __iomem *addr);
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extern u64 ioread64be_lo_hi(const void __iomem *addr);
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extern u64 ioread64be_hi_lo(const void __iomem *addr);
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#endif
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extern void iowrite8(u8, void __iomem *);
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extern void iowrite16(u16, void __iomem *);
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extern void iowrite16be(u16, void __iomem *);
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extern void iowrite32(u32, void __iomem *);
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extern void iowrite32be(u32, void __iomem *);
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#ifdef CONFIG_64BIT
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extern void iowrite64(u64, void __iomem *);
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extern void iowrite64be(u64, void __iomem *);
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#endif
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#ifdef writeq
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#define iowrite64_lo_hi iowrite64_lo_hi
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#define iowrite64_hi_lo iowrite64_hi_lo
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#define iowrite64be_lo_hi iowrite64be_lo_hi
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#define iowrite64be_hi_lo iowrite64be_hi_lo
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extern void iowrite64_lo_hi(u64 val, void __iomem *addr);
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extern void iowrite64_hi_lo(u64 val, void __iomem *addr);
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extern void iowrite64be_lo_hi(u64 val, void __iomem *addr);
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extern void iowrite64be_hi_lo(u64 val, void __iomem *addr);
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#endif
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/*
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* "string" versions of the above. Note that they
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* use native byte ordering for the accesses (on
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* the assumption that IO and memory agree on a
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* byte order, and CPU byteorder is irrelevant).
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*
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* They do _not_ update the port address. If you
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* want MMIO that copies stuff laid out in MMIO
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* memory across multiple ports, use "memcpy_toio()"
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* and friends.
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*/
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extern void ioread8_rep(const void __iomem *port, void *buf, unsigned long count);
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extern void ioread16_rep(const void __iomem *port, void *buf, unsigned long count);
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extern void ioread32_rep(const void __iomem *port, void *buf, unsigned long count);
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extern void iowrite8_rep(void __iomem *port, const void *buf, unsigned long count);
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extern void iowrite16_rep(void __iomem *port, const void *buf, unsigned long count);
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extern void iowrite32_rep(void __iomem *port, const void *buf, unsigned long count);
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#ifdef CONFIG_HAS_IOPORT_MAP
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/* Create a virtual mapping cookie for an IO port range */
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extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
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extern void ioport_unmap(void __iomem *);
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#endif
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#ifndef ARCH_HAS_IOREMAP_WC
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#define ioremap_wc ioremap
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#endif
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#ifndef ARCH_HAS_IOREMAP_WT
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#define ioremap_wt ioremap
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#endif
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#ifndef ARCH_HAS_IOREMAP_NP
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/* See the comment in asm-generic/io.h about ioremap_np(). */
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#define ioremap_np ioremap_np
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static inline void __iomem *ioremap_np(phys_addr_t offset, size_t size)
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{
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return NULL;
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}
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#endif
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#include <asm-generic/pci_iomap.h>
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#endif
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