From 200c79da824c978fcf6eec1dc9c0a1e521133267 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Tue, 22 Mar 2016 00:22:16 -0700 Subject: libnvdimm, pmem, pfn: make pmem_rw_bytes generic and refactor pfn setup In preparation for providing an alternative (to block device) access mechanism to persistent memory, convert pmem_rw_bytes() to nsio_rw_bytes(). This allows ->rw_bytes() functionality without requiring a 'struct pmem_device' to be instantiated. In other words, when ->rw_bytes() is in use i/o is driven through 'struct nd_namespace_io', otherwise it is driven through 'struct pmem_device' and the block layer. This consolidates the disjoint calls to devm_exit_badblocks() and devm_memunmap() into a common devm_nsio_disable() and cleans up the init path to use a unified pmem_attach_disk() implementation. Reviewed-by: Johannes Thumshirn Signed-off-by: Dan Williams --- include/linux/nd.h | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'include/linux/nd.h') diff --git a/include/linux/nd.h b/include/linux/nd.h index 5ea4aec7fd63..aee2761d294c 100644 --- a/include/linux/nd.h +++ b/include/linux/nd.h @@ -15,6 +15,7 @@ #include #include #include +#include enum nvdimm_event { NVDIMM_REVALIDATE_POISON, @@ -55,13 +56,19 @@ static inline struct nd_namespace_common *to_ndns(struct device *dev) } /** - * struct nd_namespace_io - infrastructure for loading an nd_pmem instance + * struct nd_namespace_io - device representation of a persistent memory range * @dev: namespace device created by the nd region driver * @res: struct resource conversion of a NFIT SPA table + * @size: cached resource_size(@res) for fast path size checks + * @addr: virtual address to access the namespace range + * @bb: badblocks list for the namespace range */ struct nd_namespace_io { struct nd_namespace_common common; struct resource res; + resource_size_t size; + void __pmem *addr; + struct badblocks bb; }; /** -- cgit v1.2.3