mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-19 06:46:49 +07:00
4e4f00a9b5
With all handling of the CONFIG_ARCH_HAS_PMEM_API case being moved to libnvdimm and the pmem driver directly we do not need to provide global wrappers and fallbacks in the CONFIG_ARCH_HAS_PMEM_API=n case. The pmem driver will simply not link to arch_wb_cache_pmem() in that case. Same as before, pmem flushing is only defined for x86_64, via clean_cache_range(), but it is straightforward to add other archs in the future. arch_wb_cache_pmem() is an exported function since the pmem module needs to find it, but it is privately declared in drivers/nvdimm/pmem.h because there are no consumers outside of the pmem driver. Cc: <x86@kernel.org> Cc: Jan Kara <jack@suse.cz> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Oliver O'Halloran <oohall@gmail.com> Cc: Matthew Wilcox <mawilcox@microsoft.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Suggested-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
36 lines
979 B
C
36 lines
979 B
C
#ifndef __NVDIMM_PMEM_H__
|
|
#define __NVDIMM_PMEM_H__
|
|
#include <linux/badblocks.h>
|
|
#include <linux/types.h>
|
|
#include <linux/pfn_t.h>
|
|
#include <linux/fs.h>
|
|
|
|
#ifdef CONFIG_ARCH_HAS_PMEM_API
|
|
void arch_wb_cache_pmem(void *addr, size_t size);
|
|
#else
|
|
static inline void arch_wb_cache_pmem(void *addr, size_t size)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
/* this definition is in it's own header for tools/testing/nvdimm to consume */
|
|
struct pmem_device {
|
|
/* One contiguous memory region per device */
|
|
phys_addr_t phys_addr;
|
|
/* when non-zero this device is hosting a 'pfn' instance */
|
|
phys_addr_t data_offset;
|
|
u64 pfn_flags;
|
|
void *virt_addr;
|
|
/* immutable base size of the namespace */
|
|
size_t size;
|
|
/* trim size when namespace capacity has been section aligned */
|
|
u32 pfn_pad;
|
|
struct badblocks bb;
|
|
struct dax_device *dax_dev;
|
|
struct gendisk *disk;
|
|
};
|
|
|
|
long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff,
|
|
long nr_pages, void **kaddr, pfn_t *pfn);
|
|
#endif /* __NVDIMM_PMEM_H__ */
|