diff options
Diffstat (limited to 'include/linux/pmem.h')
| -rw-r--r-- | include/linux/pmem.h | 70 |
1 files changed, 17 insertions, 53 deletions
diff --git a/include/linux/pmem.h b/include/linux/pmem.h index 9e3ea94b8157..e856c2cb0fe8 100644 --- a/include/linux/pmem.h +++ b/include/linux/pmem.h @@ -26,37 +26,35 @@ * calling these symbols with arch_has_pmem_api() and redirect to the * implementation in asm/pmem.h. */ -static inline void arch_memcpy_to_pmem(void __pmem *dst, const void *src, - size_t n) +static inline void arch_memcpy_to_pmem(void *dst, const void *src, size_t n) { BUG(); } -static inline int arch_memcpy_from_pmem(void *dst, const void __pmem *src, - size_t n) +static inline int arch_memcpy_from_pmem(void *dst, const void *src, size_t n) { BUG(); return -EFAULT; } -static inline size_t arch_copy_from_iter_pmem(void __pmem *addr, size_t bytes, +static inline size_t arch_copy_from_iter_pmem(void *addr, size_t bytes, struct iov_iter *i) { BUG(); return 0; } -static inline void arch_clear_pmem(void __pmem *addr, size_t size) +static inline void arch_clear_pmem(void *addr, size_t size) { BUG(); } -static inline void arch_wb_cache_pmem(void __pmem *addr, size_t size) +static inline void arch_wb_cache_pmem(void *addr, size_t size) { BUG(); } -static inline void arch_invalidate_pmem(void __pmem *addr, size_t size) +static inline void arch_invalidate_pmem(void *addr, size_t size) { BUG(); } @@ -67,13 +65,6 @@ static inline bool arch_has_pmem_api(void) return IS_ENABLED(CONFIG_ARCH_HAS_PMEM_API); } -static inline int default_memcpy_from_pmem(void *dst, void __pmem const *src, - size_t size) -{ - memcpy(dst, (void __force *) src, size); - return 0; -} - /* * memcpy_from_pmem - read from persistent memory with error handling * @dst: destination buffer @@ -82,40 +73,13 @@ static inline int default_memcpy_from_pmem(void *dst, void __pmem const *src, * * Returns 0 on success negative error code on failure. */ -static inline int memcpy_from_pmem(void *dst, void __pmem const *src, - size_t size) +static inline int memcpy_from_pmem(void *dst, void const *src, size_t size) { if (arch_has_pmem_api()) return arch_memcpy_from_pmem(dst, src, size); else - return default_memcpy_from_pmem(dst, src, size); -} - -/* - * These defaults seek to offer decent performance and minimize the - * window between i/o completion and writes being durable on media. - * However, it is undefined / architecture specific whether - * ARCH_MEMREMAP_PMEM + default_memcpy_to_pmem is sufficient for - * making data durable relative to i/o completion. - */ -static inline void default_memcpy_to_pmem(void __pmem *dst, const void *src, - size_t size) -{ - memcpy((void __force *) dst, src, size); -} - -static inline size_t default_copy_from_iter_pmem(void __pmem *addr, - size_t bytes, struct iov_iter *i) -{ - return copy_from_iter_nocache((void __force *)addr, bytes, i); -} - -static inline void default_clear_pmem(void __pmem *addr, size_t size) -{ - if (size == PAGE_SIZE && ((unsigned long)addr & ~PAGE_MASK) == 0) - clear_page((void __force *)addr); - else - memset((void __force *)addr, 0, size); + memcpy(dst, src, size); + return 0; } /** @@ -130,12 +94,12 @@ static inline void default_clear_pmem(void __pmem *addr, size_t size) * data may still reside in cpu or platform buffers, so this operation * must be followed by a blkdev_issue_flush() on the pmem block device. */ -static inline void memcpy_to_pmem(void __pmem *dst, const void *src, size_t n) +static inline void memcpy_to_pmem(void *dst, const void *src, size_t n) { if (arch_has_pmem_api()) arch_memcpy_to_pmem(dst, src, n); else - default_memcpy_to_pmem(dst, src, n); + memcpy(dst, src, n); } /** @@ -147,12 +111,12 @@ static inline void memcpy_to_pmem(void __pmem *dst, const void *src, size_t n) * Copy data from the iterator 'i' to the PMEM buffer starting at 'addr'. * See blkdev_issue_flush() note for memcpy_to_pmem(). */ -static inline size_t copy_from_iter_pmem(void __pmem *addr, size_t bytes, +static inline size_t copy_from_iter_pmem(void *addr, size_t bytes, struct iov_iter *i) { if (arch_has_pmem_api()) return arch_copy_from_iter_pmem(addr, bytes, i); - return default_copy_from_iter_pmem(addr, bytes, i); + return copy_from_iter_nocache(addr, bytes, i); } /** @@ -163,12 +127,12 @@ static inline size_t copy_from_iter_pmem(void __pmem *addr, size_t bytes, * Write zeros into the memory range starting at 'addr' for 'size' bytes. * See blkdev_issue_flush() note for memcpy_to_pmem(). */ -static inline void clear_pmem(void __pmem *addr, size_t size) +static inline void clear_pmem(void *addr, size_t size) { if (arch_has_pmem_api()) arch_clear_pmem(addr, size); else - default_clear_pmem(addr, size); + memset(addr, 0, size); } /** @@ -179,7 +143,7 @@ static inline void clear_pmem(void __pmem *addr, size_t size) * For platforms that support clearing poison this flushes any poisoned * ranges out of the cache */ -static inline void invalidate_pmem(void __pmem *addr, size_t size) +static inline void invalidate_pmem(void *addr, size_t size) { if (arch_has_pmem_api()) arch_invalidate_pmem(addr, size); @@ -193,7 +157,7 @@ static inline void invalidate_pmem(void __pmem *addr, size_t size) * Write back the processor cache range starting at 'addr' for 'size' bytes. * See blkdev_issue_flush() note for memcpy_to_pmem(). */ -static inline void wb_cache_pmem(void __pmem *addr, size_t size) +static inline void wb_cache_pmem(void *addr, size_t size) { if (arch_has_pmem_api()) arch_wb_cache_pmem(addr, size); 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