mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-12 21:44:06 +08:00
95da27c4c6
Now there are no users of ioremap_allowed and iounmap_allowed, clean them up. Link: https://lkml.kernel.org/r/20230706154520.11257-20-bhe@redhat.com Signed-off-by: Baoquan He <bhe@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com> Reviewed-by: Mike Rapoport (IBM) <rppt@kernel.org> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Brian Cain <bcain@quicinc.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Chris Zankel <chris@zankel.net> Cc: David Laight <David.Laight@ACULAB.COM> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Jonas Bonn <jonas@southpole.se> Cc: Matthew Wilcox <willy@infradead.org> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Niklas Schnelle <schnelle@linux.ibm.com> Cc: Rich Felker <dalias@libc.org> Cc: Stafford Horne <shorne@gmail.com> Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Vineet Gupta <vgupta@kernel.org> Cc: Will Deacon <will@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
75 lines
1.7 KiB
C
75 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Re-map IO memory to kernel address space so that we can access it.
|
|
* This is needed for high PCI addresses that aren't mapped in the
|
|
* 640k-1MB IO memory area on PC's
|
|
*
|
|
* (C) Copyright 1995 1996 Linus Torvalds
|
|
*/
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/io.h>
|
|
#include <linux/export.h>
|
|
#include <linux/ioremap.h>
|
|
|
|
void __iomem *generic_ioremap_prot(phys_addr_t phys_addr, size_t size,
|
|
pgprot_t prot)
|
|
{
|
|
unsigned long offset, vaddr;
|
|
phys_addr_t last_addr;
|
|
struct vm_struct *area;
|
|
|
|
/* An early platform driver might end up here */
|
|
if (WARN_ON_ONCE(!slab_is_available()))
|
|
return NULL;
|
|
|
|
/* Disallow wrap-around or zero size */
|
|
last_addr = phys_addr + size - 1;
|
|
if (!size || last_addr < phys_addr)
|
|
return NULL;
|
|
|
|
/* Page-align mappings */
|
|
offset = phys_addr & (~PAGE_MASK);
|
|
phys_addr -= offset;
|
|
size = PAGE_ALIGN(size + offset);
|
|
|
|
area = __get_vm_area_caller(size, VM_IOREMAP, IOREMAP_START,
|
|
IOREMAP_END, __builtin_return_address(0));
|
|
if (!area)
|
|
return NULL;
|
|
vaddr = (unsigned long)area->addr;
|
|
area->phys_addr = phys_addr;
|
|
|
|
if (ioremap_page_range(vaddr, vaddr + size, phys_addr, prot)) {
|
|
free_vm_area(area);
|
|
return NULL;
|
|
}
|
|
|
|
return (void __iomem *)(vaddr + offset);
|
|
}
|
|
|
|
#ifndef ioremap_prot
|
|
void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,
|
|
unsigned long prot)
|
|
{
|
|
return generic_ioremap_prot(phys_addr, size, __pgprot(prot));
|
|
}
|
|
EXPORT_SYMBOL(ioremap_prot);
|
|
#endif
|
|
|
|
void generic_iounmap(volatile void __iomem *addr)
|
|
{
|
|
void *vaddr = (void *)((unsigned long)addr & PAGE_MASK);
|
|
|
|
if (is_ioremap_addr(vaddr))
|
|
vunmap(vaddr);
|
|
}
|
|
|
|
#ifndef iounmap
|
|
void iounmap(volatile void __iomem *addr)
|
|
{
|
|
generic_iounmap(addr);
|
|
}
|
|
EXPORT_SYMBOL(iounmap);
|
|
#endif
|