| Message ID | 149703984208.20620.7803227571371078891.stgit@dwillia2-desk3.amr.corp.intel.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Delegated to: | Mike Snitzer |
| Headers | show |
On Fri 09-06-17 13:24:02, Dan Williams wrote: > Now that all possible providers of the dax_operations copy_from_iter > method are implemented, switch filesytem-dax to call the driver rather > than copy_to_iter_pmem. > > Signed-off-by: Dan Williams <dan.j.williams@intel.com> Looks good to me. You can add: Reviewed-by: Jan Kara <jack@suse.cz> Honza > --- > arch/x86/include/asm/pmem.h | 50 ------------------------------------------- > fs/dax.c | 3 ++- > include/linux/pmem.h | 24 --------------------- > 3 files changed, 2 insertions(+), 75 deletions(-) > > diff --git a/arch/x86/include/asm/pmem.h b/arch/x86/include/asm/pmem.h > index 0ff8fe71b255..60e8edbe0205 100644 > --- a/arch/x86/include/asm/pmem.h > +++ b/arch/x86/include/asm/pmem.h > @@ -66,56 +66,6 @@ static inline void arch_wb_cache_pmem(void *addr, size_t size) > } > > /** > - * arch_copy_from_iter_pmem - copy data from an iterator to PMEM > - * @addr: PMEM destination address > - * @bytes: number of bytes to copy > - * @i: iterator with source data > - * > - * Copy data from the iterator 'i' to the PMEM buffer starting at 'addr'. > - */ > -static inline size_t arch_copy_from_iter_pmem(void *addr, size_t bytes, > - struct iov_iter *i) > -{ > - size_t len; > - > - /* TODO: skip the write-back by always using non-temporal stores */ > - len = copy_from_iter_nocache(addr, bytes, i); > - > - /* > - * In the iovec case on x86_64 copy_from_iter_nocache() uses > - * non-temporal stores for the bulk of the transfer, but we need > - * to manually flush if the transfer is unaligned. A cached > - * memory copy is used when destination or size is not naturally > - * aligned. That is: > - * - Require 8-byte alignment when size is 8 bytes or larger. > - * - Require 4-byte alignment when size is 4 bytes. > - * > - * In the non-iovec case the entire destination needs to be > - * flushed. > - */ > - if (iter_is_iovec(i)) { > - unsigned long flushed, dest = (unsigned long) addr; > - > - if (bytes < 8) { > - if (!IS_ALIGNED(dest, 4) || (bytes != 4)) > - arch_wb_cache_pmem(addr, bytes); > - } else { > - if (!IS_ALIGNED(dest, 8)) { > - dest = ALIGN(dest, boot_cpu_data.x86_clflush_size); > - arch_wb_cache_pmem(addr, 1); > - } > - > - flushed = dest - (unsigned long) addr; > - if (bytes > flushed && !IS_ALIGNED(bytes - flushed, 8)) > - arch_wb_cache_pmem(addr + bytes - 1, 1); > - } > - } else > - arch_wb_cache_pmem(addr, bytes); > - > - return len; > -} > - > -/** > * arch_clear_pmem - zero a PMEM memory range > * @addr: virtual start address > * @size: number of bytes to zero > diff --git a/fs/dax.c b/fs/dax.c > index 2a6889b3585f..b459948de427 100644 > --- a/fs/dax.c > +++ b/fs/dax.c > @@ -1054,7 +1054,8 @@ dax_iomap_actor(struct inode *inode, loff_t pos, loff_t length, void *data, > map_len = end - pos; > > if (iov_iter_rw(iter) == WRITE) > - map_len = copy_from_iter_pmem(kaddr, map_len, iter); > + map_len = dax_copy_from_iter(dax_dev, pgoff, kaddr, > + map_len, iter); > else > map_len = copy_to_iter(kaddr, map_len, iter); > if (map_len <= 0) { > diff --git a/include/linux/pmem.h b/include/linux/pmem.h > index 71ecf3d46aac..9d542a5600e4 100644 > --- a/include/linux/pmem.h > +++ b/include/linux/pmem.h > @@ -31,13 +31,6 @@ static inline void arch_memcpy_to_pmem(void *dst, const void *src, size_t n) > BUG(); > } > > -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 *addr, size_t size) > { > BUG(); > @@ -80,23 +73,6 @@ static inline void memcpy_to_pmem(void *dst, const void *src, size_t n) > } > > /** > - * copy_from_iter_pmem - copy data from an iterator to PMEM > - * @addr: PMEM destination address > - * @bytes: number of bytes to copy > - * @i: iterator with source data > - * > - * 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 *addr, size_t bytes, > - struct iov_iter *i) > -{ > - if (arch_has_pmem_api()) > - return arch_copy_from_iter_pmem(addr, bytes, i); > - return copy_from_iter_nocache(addr, bytes, i); > -} > - > -/** > * clear_pmem - zero a PMEM memory range > * @addr: virtual start address > * @size: number of bytes to zero >
diff --git a/arch/x86/include/asm/pmem.h b/arch/x86/include/asm/pmem.h index 0ff8fe71b255..60e8edbe0205 100644 --- a/arch/x86/include/asm/pmem.h +++ b/arch/x86/include/asm/pmem.h @@ -66,56 +66,6 @@ static inline void arch_wb_cache_pmem(void *addr, size_t size) } /** - * arch_copy_from_iter_pmem - copy data from an iterator to PMEM - * @addr: PMEM destination address - * @bytes: number of bytes to copy - * @i: iterator with source data - * - * Copy data from the iterator 'i' to the PMEM buffer starting at 'addr'. - */ -static inline size_t arch_copy_from_iter_pmem(void *addr, size_t bytes, - struct iov_iter *i) -{ - size_t len; - - /* TODO: skip the write-back by always using non-temporal stores */ - len = copy_from_iter_nocache(addr, bytes, i); - - /* - * In the iovec case on x86_64 copy_from_iter_nocache() uses - * non-temporal stores for the bulk of the transfer, but we need - * to manually flush if the transfer is unaligned. A cached - * memory copy is used when destination or size is not naturally - * aligned. That is: - * - Require 8-byte alignment when size is 8 bytes or larger. - * - Require 4-byte alignment when size is 4 bytes. - * - * In the non-iovec case the entire destination needs to be - * flushed. - */ - if (iter_is_iovec(i)) { - unsigned long flushed, dest = (unsigned long) addr; - - if (bytes < 8) { - if (!IS_ALIGNED(dest, 4) || (bytes != 4)) - arch_wb_cache_pmem(addr, bytes); - } else { - if (!IS_ALIGNED(dest, 8)) { - dest = ALIGN(dest, boot_cpu_data.x86_clflush_size); - arch_wb_cache_pmem(addr, 1); - } - - flushed = dest - (unsigned long) addr; - if (bytes > flushed && !IS_ALIGNED(bytes - flushed, 8)) - arch_wb_cache_pmem(addr + bytes - 1, 1); - } - } else - arch_wb_cache_pmem(addr, bytes); - - return len; -} - -/** * arch_clear_pmem - zero a PMEM memory range * @addr: virtual start address * @size: number of bytes to zero diff --git a/fs/dax.c b/fs/dax.c index 2a6889b3585f..b459948de427 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -1054,7 +1054,8 @@ dax_iomap_actor(struct inode *inode, loff_t pos, loff_t length, void *data, map_len = end - pos; if (iov_iter_rw(iter) == WRITE) - map_len = copy_from_iter_pmem(kaddr, map_len, iter); + map_len = dax_copy_from_iter(dax_dev, pgoff, kaddr, + map_len, iter); else map_len = copy_to_iter(kaddr, map_len, iter); if (map_len <= 0) { diff --git a/include/linux/pmem.h b/include/linux/pmem.h index 71ecf3d46aac..9d542a5600e4 100644 --- a/include/linux/pmem.h +++ b/include/linux/pmem.h @@ -31,13 +31,6 @@ static inline void arch_memcpy_to_pmem(void *dst, const void *src, size_t n) BUG(); } -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 *addr, size_t size) { BUG(); @@ -80,23 +73,6 @@ static inline void memcpy_to_pmem(void *dst, const void *src, size_t n) } /** - * copy_from_iter_pmem - copy data from an iterator to PMEM - * @addr: PMEM destination address - * @bytes: number of bytes to copy - * @i: iterator with source data - * - * 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 *addr, size_t bytes, - struct iov_iter *i) -{ - if (arch_has_pmem_api()) - return arch_copy_from_iter_pmem(addr, bytes, i); - return copy_from_iter_nocache(addr, bytes, i); -} - -/** * clear_pmem - zero a PMEM memory range * @addr: virtual start address * @size: number of bytes to zero
Now that all possible providers of the dax_operations copy_from_iter method are implemented, switch filesytem-dax to call the driver rather than copy_to_iter_pmem. Signed-off-by: Dan Williams <dan.j.williams@intel.com> --- arch/x86/include/asm/pmem.h | 50 ------------------------------------------- fs/dax.c | 3 ++- include/linux/pmem.h | 24 --------------------- 3 files changed, 2 insertions(+), 75 deletions(-) -- dm-devel mailing list dm-devel@redhat.com https://www.redhat.com/mailman/listinfo/dm-devel