pmem: kill __pmem address space
The __pmem address space was meant to annotate codepaths that touch persistent memory and need to coordinate a call to wmb_pmem(). Now that wmb_pmem() is gone, there is little need to keep this annotation. Cc: Christoph Hellwig <hch@lst.de> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams
Родитель
7c8a6a7190
Коммит
7a9eb20666
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@ -395,7 +395,7 @@ prototypes:
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int (*release) (struct gendisk *, fmode_t);
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int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
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int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
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int (*direct_access) (struct block_device *, sector_t, void __pmem **,
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int (*direct_access) (struct block_device *, sector_t, void **,
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unsigned long *);
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int (*media_changed) (struct gendisk *);
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void (*unlock_native_capacity) (struct gendisk *);
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@ -143,12 +143,12 @@ axon_ram_make_request(struct request_queue *queue, struct bio *bio)
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*/
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static long
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axon_ram_direct_access(struct block_device *device, sector_t sector,
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void __pmem **kaddr, pfn_t *pfn, long size)
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void **kaddr, pfn_t *pfn, long size)
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{
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struct axon_ram_bank *bank = device->bd_disk->private_data;
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loff_t offset = (loff_t)sector << AXON_RAM_SECTOR_SHIFT;
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*kaddr = (void __pmem __force *) bank->io_addr + offset;
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*kaddr = (void *) bank->io_addr + offset;
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*pfn = phys_to_pfn_t(bank->ph_addr + offset, PFN_DEV);
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return bank->size - offset;
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}
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@ -28,10 +28,9 @@
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* Copy data to persistent memory media via non-temporal stores so that
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* a subsequent pmem driver flush operation will drain posted write queues.
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*/
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static inline void arch_memcpy_to_pmem(void __pmem *dst, const void *src,
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size_t n)
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static inline void arch_memcpy_to_pmem(void *dst, const void *src, size_t n)
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{
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int unwritten;
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int rem;
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/*
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* We are copying between two kernel buffers, if
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@ -39,19 +38,17 @@ static inline void arch_memcpy_to_pmem(void __pmem *dst, const void *src,
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* fault) we would have already reported a general protection fault
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* before the WARN+BUG.
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*/
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unwritten = __copy_from_user_inatomic_nocache((void __force *) dst,
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(void __user *) src, n);
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if (WARN(unwritten, "%s: fault copying %p <- %p unwritten: %d\n",
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__func__, dst, src, unwritten))
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rem = __copy_from_user_inatomic_nocache(dst, (void __user *) src, n);
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if (WARN(rem, "%s: fault copying %p <- %p unwritten: %d\n",
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__func__, dst, src, rem))
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BUG();
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}
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static inline int arch_memcpy_from_pmem(void *dst, const void __pmem *src,
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size_t n)
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static inline int arch_memcpy_from_pmem(void *dst, const void *src, size_t n)
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{
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if (static_cpu_has(X86_FEATURE_MCE_RECOVERY))
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return memcpy_mcsafe(dst, (void __force *) src, n);
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memcpy(dst, (void __force *) src, n);
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return memcpy_mcsafe(dst, src, n);
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memcpy(dst, src, n);
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return 0;
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}
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@ -63,15 +60,14 @@ static inline int arch_memcpy_from_pmem(void *dst, const void __pmem *src,
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* Write back a cache range using the CLWB (cache line write back)
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* instruction.
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*/
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static inline void arch_wb_cache_pmem(void __pmem *addr, size_t size)
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static inline void arch_wb_cache_pmem(void *addr, size_t size)
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{
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u16 x86_clflush_size = boot_cpu_data.x86_clflush_size;
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unsigned long clflush_mask = x86_clflush_size - 1;
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void *vaddr = (void __force *)addr;
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void *vend = vaddr + size;
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void *vend = addr + size;
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void *p;
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for (p = (void *)((unsigned long)vaddr & ~clflush_mask);
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for (p = (void *)((unsigned long)addr & ~clflush_mask);
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p < vend; p += x86_clflush_size)
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clwb(p);
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}
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@ -93,14 +89,13 @@ static inline bool __iter_needs_pmem_wb(struct iov_iter *i)
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*
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* Copy data from the iterator 'i' to the PMEM buffer starting at 'addr'.
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*/
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static inline size_t arch_copy_from_iter_pmem(void __pmem *addr, size_t bytes,
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static inline size_t arch_copy_from_iter_pmem(void *addr, size_t bytes,
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struct iov_iter *i)
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{
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void *vaddr = (void __force *)addr;
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size_t len;
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/* TODO: skip the write-back by always using non-temporal stores */
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len = copy_from_iter_nocache(vaddr, bytes, i);
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len = copy_from_iter_nocache(addr, bytes, i);
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if (__iter_needs_pmem_wb(i))
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arch_wb_cache_pmem(addr, bytes);
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@ -115,17 +110,15 @@ static inline size_t arch_copy_from_iter_pmem(void __pmem *addr, size_t bytes,
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*
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* Write zeros into the memory range starting at 'addr' for 'size' bytes.
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*/
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static inline void arch_clear_pmem(void __pmem *addr, size_t size)
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static inline void arch_clear_pmem(void *addr, size_t size)
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{
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void *vaddr = (void __force *)addr;
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memset(vaddr, 0, size);
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memset(addr, 0, size);
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arch_wb_cache_pmem(addr, size);
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}
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static inline void arch_invalidate_pmem(void __pmem *addr, size_t size)
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static inline void arch_invalidate_pmem(void *addr, size_t size)
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{
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clflush_cache_range((void __force *) addr, size);
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clflush_cache_range(addr, size);
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}
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#endif /* CONFIG_ARCH_HAS_PMEM_API */
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#endif /* __ASM_X86_PMEM_H__ */
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@ -164,7 +164,7 @@ enum nd_blk_mmio_selector {
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struct nd_blk_addr {
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union {
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void __iomem *base;
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void __pmem *aperture;
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void *aperture;
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};
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};
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@ -381,7 +381,7 @@ static int brd_rw_page(struct block_device *bdev, sector_t sector,
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#ifdef CONFIG_BLK_DEV_RAM_DAX
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static long brd_direct_access(struct block_device *bdev, sector_t sector,
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void __pmem **kaddr, pfn_t *pfn, long size)
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void **kaddr, pfn_t *pfn, long size)
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{
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struct brd_device *brd = bdev->bd_disk->private_data;
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struct page *page;
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@ -391,7 +391,7 @@ static long brd_direct_access(struct block_device *bdev, sector_t sector,
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page = brd_insert_page(brd, sector);
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if (!page)
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return -ENOSPC;
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*kaddr = (void __pmem *)page_address(page);
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*kaddr = page_address(page);
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*pfn = page_to_pfn_t(page);
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return PAGE_SIZE;
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@ -74,7 +74,7 @@ static int pmem_do_bvec(struct pmem_device *pmem, struct page *page,
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bool bad_pmem = false;
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void *mem = kmap_atomic(page);
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phys_addr_t pmem_off = sector * 512 + pmem->data_offset;
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void __pmem *pmem_addr = pmem->virt_addr + pmem_off;
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void *pmem_addr = pmem->virt_addr + pmem_off;
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if (unlikely(is_bad_pmem(&pmem->bb, sector, len)))
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bad_pmem = true;
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@ -173,7 +173,7 @@ static int pmem_rw_page(struct block_device *bdev, sector_t sector,
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/* see "strong" declaration in tools/testing/nvdimm/pmem-dax.c */
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__weak long pmem_direct_access(struct block_device *bdev, sector_t sector,
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void __pmem **kaddr, pfn_t *pfn, long size)
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void **kaddr, pfn_t *pfn, long size)
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{
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struct pmem_device *pmem = bdev->bd_queue->queuedata;
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resource_size_t offset = sector * 512 + pmem->data_offset;
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@ -284,7 +284,7 @@ static int pmem_attach_disk(struct device *dev,
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if (IS_ERR(addr))
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return PTR_ERR(addr);
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pmem->virt_addr = (void __pmem *) addr;
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pmem->virt_addr = addr;
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blk_queue_write_cache(q, true, true);
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blk_queue_make_request(q, pmem_make_request);
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@ -6,7 +6,7 @@
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#include <linux/fs.h>
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long pmem_direct_access(struct block_device *bdev, sector_t sector,
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void __pmem **kaddr, pfn_t *pfn, long size);
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void **kaddr, pfn_t *pfn, long size);
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/* this definition is in it's own header for tools/testing/nvdimm to consume */
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struct pmem_device {
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/* One contiguous memory region per device */
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@ -14,7 +14,7 @@ struct pmem_device {
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/* when non-zero this device is hosting a 'pfn' instance */
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phys_addr_t data_offset;
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u64 pfn_flags;
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void __pmem *virt_addr;
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void *virt_addr;
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/* immutable base size of the namespace */
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size_t size;
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/* trim size when namespace capacity has been section aligned */
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@ -31,7 +31,7 @@ static void dcssblk_release(struct gendisk *disk, fmode_t mode);
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static blk_qc_t dcssblk_make_request(struct request_queue *q,
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struct bio *bio);
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static long dcssblk_direct_access(struct block_device *bdev, sector_t secnum,
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void __pmem **kaddr, pfn_t *pfn, long size);
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void **kaddr, pfn_t *pfn, long size);
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static char dcssblk_segments[DCSSBLK_PARM_LEN] = "\0";
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@ -884,7 +884,7 @@ fail:
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static long
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dcssblk_direct_access (struct block_device *bdev, sector_t secnum,
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void __pmem **kaddr, pfn_t *pfn, long size)
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void **kaddr, pfn_t *pfn, long size)
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{
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struct dcssblk_dev_info *dev_info;
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unsigned long offset, dev_sz;
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@ -894,7 +894,7 @@ dcssblk_direct_access (struct block_device *bdev, sector_t secnum,
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return -ENODEV;
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dev_sz = dev_info->end - dev_info->start;
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offset = secnum * 512;
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*kaddr = (void __pmem *) (dev_info->start + offset);
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*kaddr = (void *) dev_info->start + offset;
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*pfn = __pfn_to_pfn_t(PFN_DOWN(dev_info->start + offset), PFN_DEV);
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return dev_sz - offset;
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6
fs/dax.c
6
fs/dax.c
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@ -75,13 +75,13 @@ static long dax_map_atomic(struct block_device *bdev, struct blk_dax_ctl *dax)
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struct request_queue *q = bdev->bd_queue;
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long rc = -EIO;
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dax->addr = (void __pmem *) ERR_PTR(-EIO);
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dax->addr = ERR_PTR(-EIO);
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if (blk_queue_enter(q, true) != 0)
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return rc;
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rc = bdev_direct_access(bdev, dax);
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if (rc < 0) {
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dax->addr = (void __pmem *) ERR_PTR(rc);
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dax->addr = ERR_PTR(rc);
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blk_queue_exit(q);
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return rc;
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}
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@ -152,7 +152,7 @@ static ssize_t dax_io(struct inode *inode, struct iov_iter *iter,
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int rw = iov_iter_rw(iter), rc;
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long map_len = 0;
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struct blk_dax_ctl dax = {
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.addr = (void __pmem *) ERR_PTR(-EIO),
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.addr = ERR_PTR(-EIO),
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};
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unsigned blkbits = inode->i_blkbits;
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sector_t file_blks = (i_size_read(inode) + (1 << blkbits) - 1)
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@ -1659,7 +1659,7 @@ static inline bool integrity_req_gap_front_merge(struct request *req,
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*/
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struct blk_dax_ctl {
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sector_t sector;
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void __pmem *addr;
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void *addr;
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long size;
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pfn_t pfn;
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};
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@ -1670,8 +1670,8 @@ struct block_device_operations {
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int (*rw_page)(struct block_device *, sector_t, struct page *, int rw);
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int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
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int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
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long (*direct_access)(struct block_device *, sector_t, void __pmem **,
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pfn_t *, long);
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long (*direct_access)(struct block_device *, sector_t, void **, pfn_t *,
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long);
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unsigned int (*check_events) (struct gendisk *disk,
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unsigned int clearing);
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/* ->media_changed() is DEPRECATED, use ->check_events() instead */
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@ -17,7 +17,6 @@
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# define __release(x) __context__(x,-1)
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# define __cond_lock(x,c) ((c) ? ({ __acquire(x); 1; }) : 0)
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# define __percpu __attribute__((noderef, address_space(3)))
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# define __pmem __attribute__((noderef, address_space(5)))
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#ifdef CONFIG_SPARSE_RCU_POINTER
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# define __rcu __attribute__((noderef, address_space(4)))
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#else /* CONFIG_SPARSE_RCU_POINTER */
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@ -45,7 +44,6 @@ extern void __chk_io_ptr(const volatile void __iomem *);
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# define __cond_lock(x,c) (c)
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# define __percpu
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# define __rcu
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# define __pmem
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# define __private
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# define ACCESS_PRIVATE(p, member) ((p)->member)
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#endif /* __CHECKER__ */
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@ -68,7 +68,7 @@ struct nd_namespace_io {
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struct nd_namespace_common common;
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struct resource res;
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resource_size_t size;
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void __pmem *addr;
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void *addr;
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struct badblocks bb;
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};
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@ -26,37 +26,35 @@
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* calling these symbols with arch_has_pmem_api() and redirect to the
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* implementation in asm/pmem.h.
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*/
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static inline void arch_memcpy_to_pmem(void __pmem *dst, const void *src,
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size_t n)
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static inline void arch_memcpy_to_pmem(void *dst, const void *src, size_t n)
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{
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BUG();
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}
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static inline int arch_memcpy_from_pmem(void *dst, const void __pmem *src,
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size_t n)
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static inline int arch_memcpy_from_pmem(void *dst, const void *src, size_t n)
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{
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BUG();
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return -EFAULT;
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}
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static inline size_t arch_copy_from_iter_pmem(void __pmem *addr, size_t bytes,
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static inline size_t arch_copy_from_iter_pmem(void *addr, size_t bytes,
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struct iov_iter *i)
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{
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BUG();
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return 0;
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}
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static inline void arch_clear_pmem(void __pmem *addr, size_t size)
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static inline void arch_clear_pmem(void *addr, size_t size)
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{
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BUG();
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}
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static inline void arch_wb_cache_pmem(void __pmem *addr, size_t size)
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static inline void arch_wb_cache_pmem(void *addr, size_t size)
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{
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BUG();
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}
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static inline void arch_invalidate_pmem(void __pmem *addr, size_t size)
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static inline void arch_invalidate_pmem(void *addr, size_t size)
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{
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BUG();
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}
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@ -67,13 +65,6 @@ static inline bool arch_has_pmem_api(void)
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return IS_ENABLED(CONFIG_ARCH_HAS_PMEM_API);
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}
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static inline int default_memcpy_from_pmem(void *dst, void __pmem const *src,
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size_t size)
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{
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memcpy(dst, (void __force *) src, size);
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return 0;
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}
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/*
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* memcpy_from_pmem - read from persistent memory with error handling
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* @dst: destination buffer
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@ -82,40 +73,13 @@ static inline int default_memcpy_from_pmem(void *dst, void __pmem const *src,
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*
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* Returns 0 on success negative error code on failure.
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*/
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static inline int memcpy_from_pmem(void *dst, void __pmem const *src,
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size_t size)
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static inline int memcpy_from_pmem(void *dst, void const *src, size_t size)
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{
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if (arch_has_pmem_api())
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return arch_memcpy_from_pmem(dst, src, size);
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else
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return default_memcpy_from_pmem(dst, src, size);
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}
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/*
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* These defaults seek to offer decent performance and minimize the
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* window between i/o completion and writes being durable on media.
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* However, it is undefined / architecture specific whether
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* ARCH_MEMREMAP_PMEM + default_memcpy_to_pmem is sufficient for
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* making data durable relative to i/o completion.
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*/
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static inline void default_memcpy_to_pmem(void __pmem *dst, const void *src,
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size_t size)
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{
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memcpy((void __force *) dst, src, size);
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}
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static inline size_t default_copy_from_iter_pmem(void __pmem *addr,
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size_t bytes, struct iov_iter *i)
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{
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return copy_from_iter_nocache((void __force *)addr, bytes, i);
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}
|
||||
|
||||
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);
|
||||
|
|
|
|||
|
|
@ -313,7 +313,6 @@ our $Sparse = qr{
|
|||
__kernel|
|
||||
__force|
|
||||
__iomem|
|
||||
__pmem|
|
||||
__must_check|
|
||||
__init_refok|
|
||||
__kprobes|
|
||||
|
|
|
|||
|
|
@ -16,7 +16,7 @@
|
|||
#include <nd.h>
|
||||
|
||||
long pmem_direct_access(struct block_device *bdev, sector_t sector,
|
||||
void __pmem **kaddr, pfn_t *pfn, long size)
|
||||
void **kaddr, pfn_t *pfn, long size)
|
||||
{
|
||||
struct pmem_device *pmem = bdev->bd_queue->queuedata;
|
||||
resource_size_t offset = sector * 512 + pmem->data_offset;
|
||||
|
|
|
|||
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