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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/pfn.h
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/pfn.h')
-rw-r--r--drivers/nvdimm/pfn.h35
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/nvdimm/pfn.h b/drivers/nvdimm/pfn.h
new file mode 100644
index 000000000000..cc243754acef
--- /dev/null
+++ b/drivers/nvdimm/pfn.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2014-2015, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#ifndef __NVDIMM_PFN_H
+#define __NVDIMM_PFN_H
+
+#include <linux/types.h>
+
+#define PFN_SIG_LEN 16
+#define PFN_SIG "NVDIMM_PFN_INFO\0"
+
+struct nd_pfn_sb {
+ u8 signature[PFN_SIG_LEN];
+ u8 uuid[16];
+ u8 parent_uuid[16];
+ __le32 flags;
+ __le16 version_major;
+ __le16 version_minor;
+ __le64 dataoff;
+ __le64 npfns;
+ __le32 mode;
+ u8 padding[4012];
+ __le64 checksum;
+};
+#endif /* __NVDIMM_PFN_H */