linux-stable/arch/powerpc/lib/pmem.c
Cédric Le Goater d03f210e6e powerpc/pmem: Include pmem prototypes
It fixes this W=1 compile error :

../arch/powerpc/lib/pmem.c:51:6: error: no previous prototype for ‘arch_wb_cache_pmem’ [-Werror=missing-prototypes]
   51 | void arch_wb_cache_pmem(void *addr, size_t size)
      |      ^~~~~~~~~~~~~~~~~~
../arch/powerpc/lib/pmem.c:58:6: error: no previous prototype for ‘arch_invalidate_pmem’ [-Werror=missing-prototypes]
   58 | void arch_invalidate_pmem(void *addr, size_t size)
      |      ^~~~~~~~~~~~~~~~~~~~

Fixes: 32ce3862af ("powerpc/lib: Implement PMEM API")
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210104143206.695198-6-clg@kaod.org
2021-01-30 11:39:28 +11:00

94 lines
2.5 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright(c) 2017 IBM Corporation. All rights reserved.
*/
#include <linux/string.h>
#include <linux/export.h>
#include <linux/uaccess.h>
#include <linux/libnvdimm.h>
#include <asm/cacheflush.h>
static inline void __clean_pmem_range(unsigned long start, unsigned long stop)
{
unsigned long shift = l1_dcache_shift();
unsigned long bytes = l1_dcache_bytes();
void *addr = (void *)(start & ~(bytes - 1));
unsigned long size = stop - (unsigned long)addr + (bytes - 1);
unsigned long i;
for (i = 0; i < size >> shift; i++, addr += bytes)
asm volatile(PPC_DCBSTPS(%0, %1): :"i"(0), "r"(addr): "memory");
}
static inline void __flush_pmem_range(unsigned long start, unsigned long stop)
{
unsigned long shift = l1_dcache_shift();
unsigned long bytes = l1_dcache_bytes();
void *addr = (void *)(start & ~(bytes - 1));
unsigned long size = stop - (unsigned long)addr + (bytes - 1);
unsigned long i;
for (i = 0; i < size >> shift; i++, addr += bytes)
asm volatile(PPC_DCBFPS(%0, %1): :"i"(0), "r"(addr): "memory");
}
static inline void clean_pmem_range(unsigned long start, unsigned long stop)
{
if (cpu_has_feature(CPU_FTR_ARCH_207S))
return __clean_pmem_range(start, stop);
}
static inline void flush_pmem_range(unsigned long start, unsigned long stop)
{
if (cpu_has_feature(CPU_FTR_ARCH_207S))
return __flush_pmem_range(start, stop);
}
/*
* CONFIG_ARCH_HAS_PMEM_API symbols
*/
void arch_wb_cache_pmem(void *addr, size_t size)
{
unsigned long start = (unsigned long) addr;
clean_pmem_range(start, start + size);
}
EXPORT_SYMBOL_GPL(arch_wb_cache_pmem);
void arch_invalidate_pmem(void *addr, size_t size)
{
unsigned long start = (unsigned long) addr;
flush_pmem_range(start, start + size);
}
EXPORT_SYMBOL_GPL(arch_invalidate_pmem);
/*
* CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE symbols
*/
long __copy_from_user_flushcache(void *dest, const void __user *src,
unsigned size)
{
unsigned long copied, start = (unsigned long) dest;
copied = __copy_from_user(dest, src, size);
clean_pmem_range(start, start + size);
return copied;
}
void memcpy_flushcache(void *dest, const void *src, size_t size)
{
unsigned long start = (unsigned long) dest;
memcpy(dest, src, size);
clean_pmem_range(start, start + size);
}
EXPORT_SYMBOL(memcpy_flushcache);
void memcpy_page_flushcache(char *to, struct page *page, size_t offset,
size_t len)
{
memcpy_flushcache(to, page_to_virt(page) + offset, len);
}
EXPORT_SYMBOL(memcpy_page_flushcache);