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| author | Dan Williams <dan.j.williams@intel.com> | 2015-07-30 23:57:47 +0200 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2015-08-29 05:39:36 +0200 |
| commit | e1455744b27c9e6115c3508a7b2902157c2c4347 (patch) | |
| tree | 6bfbc5d78269c9389f5bcfc1adc35d4f7f2e6fa4 /drivers/nvdimm/Kconfig | |
| parent | x86, pmem: clarify that ARCH_HAS_PMEM_API implies PMEM mapped WB (diff) | |
| download | linux-e1455744b27c9e6115c3508a7b2902157c2c4347.tar.xz linux-e1455744b27c9e6115c3508a7b2902157c2c4347.zip | |
libnvdimm, pfn: 'struct page' provider infrastructure
Implement the base infrastructure for libnvdimm PFN devices. Similar to
BTT devices they take a namespace as a backing device and layer
functionality on top. In this case the functionality is reserving space
for an array of 'struct page' entries to be handed out through
pfn_to_page(). For now this is just the basic libnvdimm-device-model for
configuring the base PFN device.
As the namespace claiming mechanism for PFN devices is mostly identical
to BTT devices drivers/nvdimm/claim.c is created to house the common
bits.
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/Kconfig')
| -rw-r--r-- | drivers/nvdimm/Kconfig | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/nvdimm/Kconfig b/drivers/nvdimm/Kconfig index 72226acb5c0f..ace25b53b755 100644 --- a/drivers/nvdimm/Kconfig +++ b/drivers/nvdimm/Kconfig @@ -21,6 +21,7 @@ config BLK_DEV_PMEM default LIBNVDIMM depends on HAS_IOMEM select ND_BTT if BTT + select ND_PFN if NVDIMM_PFN help Memory ranges for PMEM are described by either an NFIT (NVDIMM Firmware Interface Table, see CONFIG_NFIT_ACPI), a @@ -47,12 +48,16 @@ config ND_BLK (CONFIG_ACPI_NFIT), or otherwise exposes BLK-mode capabilities. +config ND_CLAIM + bool + config ND_BTT tristate config BTT bool "BTT: Block Translation Table (atomic sector updates)" default y if LIBNVDIMM + select ND_CLAIM help The Block Translation Table (BTT) provides atomic sector update semantics for persistent memory devices, so that @@ -65,4 +70,21 @@ config BTT Select Y if unsure +config ND_PFN + tristate + +config NVDIMM_PFN + bool "PFN: Map persistent (device) memory" + default LIBNVDIMM + select ND_CLAIM + help + Map persistent memory, i.e. advertise it to the memory + management sub-system. By default persistent memory does + not support direct I/O, RDMA, or any other usage that + requires a 'struct page' to mediate an I/O request. This + driver allocates and initializes the infrastructure needed + to support those use cases. + + Select Y if unsure + endif |