summaryrefslogtreecommitdiff
path: root/drivers/nvdimm/Kconfig
diff options
context:
space:
mode:
authorDan Williams <dan.j.williams@intel.com>2015-07-31 00:57:47 +0300
committerDan Williams <dan.j.williams@intel.com>2015-08-29 06:39:36 +0300
commite1455744b27c9e6115c3508a7b2902157c2c4347 (patch)
tree6bfbc5d78269c9389f5bcfc1adc35d4f7f2e6fa4 /drivers/nvdimm/Kconfig
parent96601adb745186ccbcf5b078d4756f13381ec2af (diff)
downloadlinux-e1455744b27c9e6115c3508a7b2902157c2c4347.tar.xz
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/Kconfig22
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