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authorDan Williams <dan.j.williams@intel.com>2020-10-14 02:50:45 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-10-14 04:38:28 +0300
commit0b07ce872a9eca1ff88c0eb7f6e92dde127d21ca (patch)
tree33a800b8c7d4f485c919a6adabc4164db3b10ce6 /drivers/dax/dax-private.h
parent60e93dc097f7f13a16a7e4b75b8803eb2adbb721 (diff)
downloadlinux-0b07ce872a9eca1ff88c0eb7f6e92dde127d21ca.tar.xz
device-dax: introduce 'mapping' devices
In support of interrogating the physical address layout of a device with dis-contiguous ranges, introduce a sysfs directory with 'start', 'end', and 'page_offset' attributes. The alternative is trying to parse /proc/iomem, and that file will not reflect the extent layout until the device is enabled. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Joao Martins <joao.m.martins@oracle.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Ben Skeggs <bskeggs@redhat.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Brice Goglin <Brice.Goglin@inria.fr> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: David Airlie <airlied@linux.ie> Cc: David Hildenbrand <david@redhat.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Hulk Robot <hulkci@huawei.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Ira Weiny <ira.weiny@intel.com> Cc: Jason Gunthorpe <jgg@mellanox.com> Cc: Jason Yan <yanaijie@huawei.com> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: "Jérôme Glisse" <jglisse@redhat.com> Cc: Jia He <justin.he@arm.com> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Juergen Gross <jgross@suse.com> Cc: kernel test robot <lkp@intel.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Mike Rapoport <rppt@linux.ibm.com> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Stefano Stabellini <sstabellini@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Vishal Verma <vishal.l.verma@intel.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Wei Yang <richard.weiyang@linux.alibaba.com> Cc: Will Deacon <will@kernel.org> Link: https://lkml.kernel.org/r/159643104819.4062302.13691281391423291589.stgit@dwillia2-desk3.amr.corp.intel.com Link: https://lkml.kernel.org/r/160106117446.30709.2751020815463722537.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/dax/dax-private.h')
-rw-r--r--drivers/dax/dax-private.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/dax/dax-private.h b/drivers/dax/dax-private.h
index f863287107fd..13780f62b95e 100644
--- a/drivers/dax/dax-private.h
+++ b/drivers/dax/dax-private.h
@@ -40,6 +40,12 @@ struct dax_region {
struct device *youngest;
};
+struct dax_mapping {
+ struct device dev;
+ int range_id;
+ int id;
+};
+
/**
* struct dev_dax - instance data for a subdivision of a dax region, and
* data while the device is activated in the driver.
@@ -47,6 +53,7 @@ struct dax_region {
* @dax_dev - core dax functionality
* @target_node: effective numa node if dev_dax memory range is onlined
* @id: ida allocated id
+ * @ida: mapping id allocator
* @dev - device core
* @pgmap - pgmap for memmap setup / lifetime (driver owned)
* @nr_range: size of @ranges
@@ -57,12 +64,14 @@ struct dev_dax {
struct dax_device *dax_dev;
int target_node;
int id;
+ struct ida ida;
struct device dev;
struct dev_pagemap *pgmap;
int nr_range;
struct dev_dax_range {
unsigned long pgoff;
struct range range;
+ struct dax_mapping *mapping;
} *ranges;
};
@@ -70,4 +79,9 @@ static inline struct dev_dax *to_dev_dax(struct device *dev)
{
return container_of(dev, struct dev_dax, dev);
}
+
+static inline struct dax_mapping *to_dax_mapping(struct device *dev)
+{
+ return container_of(dev, struct dax_mapping, dev);
+}
#endif