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authorBaoquan He <bhe@redhat.com>2023-07-06 23:45:09 +0800
committerAndrew Morton <akpm@linux-foundation.org>2023-08-18 10:12:33 -0700
commit38d110aba3c4f3ab9a2bdf7862ae11afe5c96c43 (patch)
treed97446caab6403c77951aba87de240f9254568ec
parent06dfae39d20091f3c8aa995f00505e1e148b0b3f (diff)
ia64: mm: convert to GENERIC_IOREMAP
By taking GENERIC_IOREMAP method, the generic generic_ioremap_prot(), generic_iounmap(), and their generic wrapper ioremap_prot(), ioremap() and iounmap() are all visible and available to arch. Arch needs to provide wrapper functions to override the generic versions if there's arch specific handling in its ioremap_prot(), ioremap() or iounmap(). This change will simplify implementation by removing duplicated code with generic_ioremap_prot() and generic_iounmap(), and has the equivalent functioality as before. Here, add wrapper functions ioremap_prot() and iounmap() for ia64's special operation when ioremap() and iounmap(). Link: https://lkml.kernel.org/r/20230706154520.11257-9-bhe@redhat.com Signed-off-by: Baoquan He <bhe@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> 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: Kefeng Wang <wangkefeng.wang@huawei.com> 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>
-rw-r--r--arch/ia64/Kconfig1
-rw-r--r--arch/ia64/include/asm/io.h13
-rw-r--r--arch/ia64/mm/ioremap.c41
3 files changed, 12 insertions, 43 deletions
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 2cd93e6bf0fe..3ab75f36c037 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -47,6 +47,7 @@ config IA64
select GENERIC_IRQ_LEGACY
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select GENERIC_IOMAP
+ select GENERIC_IOREMAP
select GENERIC_SMP_IDLE_THREAD
select ARCH_TASK_STRUCT_ON_STACK
select ARCH_TASK_STRUCT_ALLOCATOR
diff --git a/arch/ia64/include/asm/io.h b/arch/ia64/include/asm/io.h
index 83a492c8d298..eedc0afa8cad 100644
--- a/arch/ia64/include/asm/io.h
+++ b/arch/ia64/include/asm/io.h
@@ -243,15 +243,12 @@ static inline void outsl(unsigned long port, const void *src,
# ifdef __KERNEL__
-extern void __iomem * ioremap(unsigned long offset, unsigned long size);
+#define _PAGE_IOREMAP pgprot_val(PAGE_KERNEL)
+
extern void __iomem * ioremap_uc(unsigned long offset, unsigned long size);
-extern void iounmap (volatile void __iomem *addr);
-static inline void __iomem * ioremap_cache (unsigned long phys_addr, unsigned long size)
-{
- return ioremap(phys_addr, size);
-}
-#define ioremap ioremap
-#define ioremap_cache ioremap_cache
+
+#define ioremap_prot ioremap_prot
+#define ioremap_cache ioremap
#define ioremap_uc ioremap_uc
#define iounmap iounmap
diff --git a/arch/ia64/mm/ioremap.c b/arch/ia64/mm/ioremap.c
index 92b81bc91397..711b6abc822e 100644
--- a/arch/ia64/mm/ioremap.c
+++ b/arch/ia64/mm/ioremap.c
@@ -29,13 +29,9 @@ early_ioremap (unsigned long phys_addr, unsigned long size)
return __ioremap_uc(phys_addr);
}
-void __iomem *
-ioremap (unsigned long phys_addr, unsigned long size)
+void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,
+ unsigned long flags)
{
- void __iomem *addr;
- struct vm_struct *area;
- unsigned long offset;
- pgprot_t prot;
u64 attr;
unsigned long gran_base, gran_size;
unsigned long page_base;
@@ -68,36 +64,12 @@ ioremap (unsigned long phys_addr, unsigned long size)
*/
page_base = phys_addr & PAGE_MASK;
size = PAGE_ALIGN(phys_addr + size) - page_base;
- if (efi_mem_attribute(page_base, size) & EFI_MEMORY_WB) {
- prot = PAGE_KERNEL;
-
- /*
- * Mappings have to be page-aligned
- */
- offset = phys_addr & ~PAGE_MASK;
- phys_addr &= PAGE_MASK;
-
- /*
- * Ok, go for it..
- */
- area = get_vm_area(size, VM_IOREMAP);
- if (!area)
- return NULL;
-
- area->phys_addr = phys_addr;
- addr = (void __iomem *) area->addr;
- if (ioremap_page_range((unsigned long) addr,
- (unsigned long) addr + size, phys_addr, prot)) {
- vunmap((void __force *) addr);
- return NULL;
- }
-
- return (void __iomem *) (offset + (char __iomem *)addr);
- }
+ if (efi_mem_attribute(page_base, size) & EFI_MEMORY_WB)
+ return generic_ioremap_prot(phys_addr, size, __pgprot(flags));
return __ioremap_uc(phys_addr);
}
-EXPORT_SYMBOL(ioremap);
+EXPORT_SYMBOL(ioremap_prot);
void __iomem *
ioremap_uc(unsigned long phys_addr, unsigned long size)
@@ -114,8 +86,7 @@ early_iounmap (volatile void __iomem *addr, unsigned long size)
{
}
-void
-iounmap (volatile void __iomem *addr)
+void iounmap(volatile void __iomem *addr)
{
if (REGION_NUMBER(addr) == RGN_GATE)
vunmap((void *) ((unsigned long) addr & PAGE_MASK));