libnvdimm: namespace indices: read and validate
This on media label format [1] consists of two index blocks followed by
an array of labels. None of these structures are ever updated in place.
A sequence number tracks the current active index and the next one to
write, while labels are written to free slots.
+------------+
| |
| nsindex0 |
| |
+------------+
| |
| nsindex1 |
| |
+------------+
| label0 |
+------------+
| label1 |
+------------+
| |
....nslot...
| |
+------------+
| labelN |
+------------+
After reading valid labels, store the dpa ranges they claim into
per-dimm resource trees.
[1]: http://pmem.io/documents/NVDIMM_Namespace_Spec.pdf
Cc: Neil Brown <neilb@suse.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams
parent
eaf961536e
commit
4a826c83db
|
|
@ -10,3 +10,4 @@ libnvdimm-y += dimm.o
|
|||
libnvdimm-y += region_devs.o
|
||||
libnvdimm-y += region.o
|
||||
libnvdimm-y += namespace_devs.o
|
||||
libnvdimm-y += label.o
|
||||
|
|
|
|||
|
|
@ -18,6 +18,7 @@
|
|||
#include <linux/slab.h>
|
||||
#include <linux/mm.h>
|
||||
#include <linux/nd.h>
|
||||
#include "label.h"
|
||||
#include "nd.h"
|
||||
|
||||
static void free_data(struct nvdimm_drvdata *ndd)
|
||||
|
|
@ -42,6 +43,11 @@ static int nvdimm_probe(struct device *dev)
|
|||
return -ENOMEM;
|
||||
|
||||
dev_set_drvdata(dev, ndd);
|
||||
ndd->dpa.name = dev_name(dev);
|
||||
ndd->ns_current = -1;
|
||||
ndd->ns_next = -1;
|
||||
ndd->dpa.start = 0;
|
||||
ndd->dpa.end = -1;
|
||||
ndd->dev = dev;
|
||||
|
||||
rc = nvdimm_init_nsarea(ndd);
|
||||
|
|
@ -54,6 +60,17 @@ static int nvdimm_probe(struct device *dev)
|
|||
|
||||
dev_dbg(dev, "config data size: %d\n", ndd->nsarea.config_size);
|
||||
|
||||
nvdimm_bus_lock(dev);
|
||||
ndd->ns_current = nd_label_validate(ndd);
|
||||
ndd->ns_next = nd_label_next_nsindex(ndd->ns_current);
|
||||
nd_label_copy(ndd, to_next_namespace_index(ndd),
|
||||
to_current_namespace_index(ndd));
|
||||
rc = nd_label_reserve_dpa(ndd);
|
||||
nvdimm_bus_unlock(dev);
|
||||
|
||||
if (rc)
|
||||
goto err;
|
||||
|
||||
return 0;
|
||||
|
||||
err:
|
||||
|
|
@ -64,7 +81,13 @@ static int nvdimm_probe(struct device *dev)
|
|||
static int nvdimm_remove(struct device *dev)
|
||||
{
|
||||
struct nvdimm_drvdata *ndd = dev_get_drvdata(dev);
|
||||
struct resource *res, *_r;
|
||||
|
||||
nvdimm_bus_lock(dev);
|
||||
dev_set_drvdata(dev, NULL);
|
||||
for_each_dpa_resource_safe(ndd, res, _r)
|
||||
nvdimm_free_dpa(ndd, res);
|
||||
nvdimm_bus_unlock(dev);
|
||||
free_data(ndd);
|
||||
|
||||
return 0;
|
||||
|
|
|
|||
|
|
@ -92,8 +92,12 @@ int nvdimm_init_config_data(struct nvdimm_drvdata *ndd)
|
|||
if (ndd->data)
|
||||
return 0;
|
||||
|
||||
if (ndd->nsarea.status || ndd->nsarea.max_xfer == 0)
|
||||
if (ndd->nsarea.status || ndd->nsarea.max_xfer == 0
|
||||
|| ndd->nsarea.config_size < ND_LABEL_MIN_SIZE) {
|
||||
dev_dbg(ndd->dev, "failed to init config data area: (%d:%d)\n",
|
||||
ndd->nsarea.max_xfer, ndd->nsarea.config_size);
|
||||
return -ENXIO;
|
||||
}
|
||||
|
||||
ndd->data = kmalloc(ndd->nsarea.config_size, GFP_KERNEL);
|
||||
if (!ndd->data)
|
||||
|
|
@ -243,6 +247,30 @@ struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus, void *provider_data,
|
|||
}
|
||||
EXPORT_SYMBOL_GPL(nvdimm_create);
|
||||
|
||||
void nvdimm_free_dpa(struct nvdimm_drvdata *ndd, struct resource *res)
|
||||
{
|
||||
WARN_ON_ONCE(!is_nvdimm_bus_locked(ndd->dev));
|
||||
kfree(res->name);
|
||||
__release_region(&ndd->dpa, res->start, resource_size(res));
|
||||
}
|
||||
|
||||
struct resource *nvdimm_allocate_dpa(struct nvdimm_drvdata *ndd,
|
||||
struct nd_label_id *label_id, resource_size_t start,
|
||||
resource_size_t n)
|
||||
{
|
||||
char *name = kmemdup(label_id, sizeof(*label_id), GFP_KERNEL);
|
||||
struct resource *res;
|
||||
|
||||
if (!name)
|
||||
return NULL;
|
||||
|
||||
WARN_ON_ONCE(!is_nvdimm_bus_locked(ndd->dev));
|
||||
res = __request_region(&ndd->dpa, start, n, name, 0);
|
||||
if (!res)
|
||||
kfree(name);
|
||||
return res;
|
||||
}
|
||||
|
||||
static int count_dimms(struct device *dev, void *c)
|
||||
{
|
||||
int *count = c;
|
||||
|
|
|
|||
|
|
@ -0,0 +1,290 @@
|
|||
/*
|
||||
* Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of version 2 of the GNU General Public License as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that 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.
|
||||
*/
|
||||
#include <linux/device.h>
|
||||
#include <linux/ndctl.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/nd.h>
|
||||
#include "nd-core.h"
|
||||
#include "label.h"
|
||||
#include "nd.h"
|
||||
|
||||
static u32 best_seq(u32 a, u32 b)
|
||||
{
|
||||
a &= NSINDEX_SEQ_MASK;
|
||||
b &= NSINDEX_SEQ_MASK;
|
||||
|
||||
if (a == 0 || a == b)
|
||||
return b;
|
||||
else if (b == 0)
|
||||
return a;
|
||||
else if (nd_inc_seq(a) == b)
|
||||
return b;
|
||||
else
|
||||
return a;
|
||||
}
|
||||
|
||||
size_t sizeof_namespace_index(struct nvdimm_drvdata *ndd)
|
||||
{
|
||||
u32 index_span;
|
||||
|
||||
if (ndd->nsindex_size)
|
||||
return ndd->nsindex_size;
|
||||
|
||||
/*
|
||||
* The minimum index space is 512 bytes, with that amount of
|
||||
* index we can describe ~1400 labels which is less than a byte
|
||||
* of overhead per label. Round up to a byte of overhead per
|
||||
* label and determine the size of the index region. Yes, this
|
||||
* starts to waste space at larger config_sizes, but it's
|
||||
* unlikely we'll ever see anything but 128K.
|
||||
*/
|
||||
index_span = ndd->nsarea.config_size / 129;
|
||||
index_span /= NSINDEX_ALIGN * 2;
|
||||
ndd->nsindex_size = index_span * NSINDEX_ALIGN;
|
||||
|
||||
return ndd->nsindex_size;
|
||||
}
|
||||
|
||||
int nd_label_validate(struct nvdimm_drvdata *ndd)
|
||||
{
|
||||
/*
|
||||
* On media label format consists of two index blocks followed
|
||||
* by an array of labels. None of these structures are ever
|
||||
* updated in place. A sequence number tracks the current
|
||||
* active index and the next one to write, while labels are
|
||||
* written to free slots.
|
||||
*
|
||||
* +------------+
|
||||
* | |
|
||||
* | nsindex0 |
|
||||
* | |
|
||||
* +------------+
|
||||
* | |
|
||||
* | nsindex1 |
|
||||
* | |
|
||||
* +------------+
|
||||
* | label0 |
|
||||
* +------------+
|
||||
* | label1 |
|
||||
* +------------+
|
||||
* | |
|
||||
* ....nslot...
|
||||
* | |
|
||||
* +------------+
|
||||
* | labelN |
|
||||
* +------------+
|
||||
*/
|
||||
struct nd_namespace_index *nsindex[] = {
|
||||
to_namespace_index(ndd, 0),
|
||||
to_namespace_index(ndd, 1),
|
||||
};
|
||||
const int num_index = ARRAY_SIZE(nsindex);
|
||||
struct device *dev = ndd->dev;
|
||||
bool valid[2] = { 0 };
|
||||
int i, num_valid = 0;
|
||||
u32 seq;
|
||||
|
||||
for (i = 0; i < num_index; i++) {
|
||||
u32 nslot;
|
||||
u8 sig[NSINDEX_SIG_LEN];
|
||||
u64 sum_save, sum, size;
|
||||
|
||||
memcpy(sig, nsindex[i]->sig, NSINDEX_SIG_LEN);
|
||||
if (memcmp(sig, NSINDEX_SIGNATURE, NSINDEX_SIG_LEN) != 0) {
|
||||
dev_dbg(dev, "%s: nsindex%d signature invalid\n",
|
||||
__func__, i);
|
||||
continue;
|
||||
}
|
||||
sum_save = __le64_to_cpu(nsindex[i]->checksum);
|
||||
nsindex[i]->checksum = __cpu_to_le64(0);
|
||||
sum = nd_fletcher64(nsindex[i], sizeof_namespace_index(ndd), 1);
|
||||
nsindex[i]->checksum = __cpu_to_le64(sum_save);
|
||||
if (sum != sum_save) {
|
||||
dev_dbg(dev, "%s: nsindex%d checksum invalid\n",
|
||||
__func__, i);
|
||||
continue;
|
||||
}
|
||||
|
||||
seq = __le32_to_cpu(nsindex[i]->seq);
|
||||
if ((seq & NSINDEX_SEQ_MASK) == 0) {
|
||||
dev_dbg(dev, "%s: nsindex%d sequence: %#x invalid\n",
|
||||
__func__, i, seq);
|
||||
continue;
|
||||
}
|
||||
|
||||
/* sanity check the index against expected values */
|
||||
if (__le64_to_cpu(nsindex[i]->myoff)
|
||||
!= i * sizeof_namespace_index(ndd)) {
|
||||
dev_dbg(dev, "%s: nsindex%d myoff: %#llx invalid\n",
|
||||
__func__, i, (unsigned long long)
|
||||
__le64_to_cpu(nsindex[i]->myoff));
|
||||
continue;
|
||||
}
|
||||
if (__le64_to_cpu(nsindex[i]->otheroff)
|
||||
!= (!i) * sizeof_namespace_index(ndd)) {
|
||||
dev_dbg(dev, "%s: nsindex%d otheroff: %#llx invalid\n",
|
||||
__func__, i, (unsigned long long)
|
||||
__le64_to_cpu(nsindex[i]->otheroff));
|
||||
continue;
|
||||
}
|
||||
|
||||
size = __le64_to_cpu(nsindex[i]->mysize);
|
||||
if (size > sizeof_namespace_index(ndd)
|
||||
|| size < sizeof(struct nd_namespace_index)) {
|
||||
dev_dbg(dev, "%s: nsindex%d mysize: %#llx invalid\n",
|
||||
__func__, i, size);
|
||||
continue;
|
||||
}
|
||||
|
||||
nslot = __le32_to_cpu(nsindex[i]->nslot);
|
||||
if (nslot * sizeof(struct nd_namespace_label)
|
||||
+ 2 * sizeof_namespace_index(ndd)
|
||||
> ndd->nsarea.config_size) {
|
||||
dev_dbg(dev, "%s: nsindex%d nslot: %u invalid, config_size: %#x\n",
|
||||
__func__, i, nslot,
|
||||
ndd->nsarea.config_size);
|
||||
continue;
|
||||
}
|
||||
valid[i] = true;
|
||||
num_valid++;
|
||||
}
|
||||
|
||||
switch (num_valid) {
|
||||
case 0:
|
||||
break;
|
||||
case 1:
|
||||
for (i = 0; i < num_index; i++)
|
||||
if (valid[i])
|
||||
return i;
|
||||
/* can't have num_valid > 0 but valid[] = { false, false } */
|
||||
WARN_ON(1);
|
||||
break;
|
||||
default:
|
||||
/* pick the best index... */
|
||||
seq = best_seq(__le32_to_cpu(nsindex[0]->seq),
|
||||
__le32_to_cpu(nsindex[1]->seq));
|
||||
if (seq == (__le32_to_cpu(nsindex[1]->seq) & NSINDEX_SEQ_MASK))
|
||||
return 1;
|
||||
else
|
||||
return 0;
|
||||
break;
|
||||
}
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
void nd_label_copy(struct nvdimm_drvdata *ndd, struct nd_namespace_index *dst,
|
||||
struct nd_namespace_index *src)
|
||||
{
|
||||
if (dst && src)
|
||||
/* pass */;
|
||||
else
|
||||
return;
|
||||
|
||||
memcpy(dst, src, sizeof_namespace_index(ndd));
|
||||
}
|
||||
|
||||
static struct nd_namespace_label *nd_label_base(struct nvdimm_drvdata *ndd)
|
||||
{
|
||||
void *base = to_namespace_index(ndd, 0);
|
||||
|
||||
return base + 2 * sizeof_namespace_index(ndd);
|
||||
}
|
||||
|
||||
#define for_each_clear_bit_le(bit, addr, size) \
|
||||
for ((bit) = find_next_zero_bit_le((addr), (size), 0); \
|
||||
(bit) < (size); \
|
||||
(bit) = find_next_zero_bit_le((addr), (size), (bit) + 1))
|
||||
|
||||
/**
|
||||
* preamble_current - common variable initialization for nd_label_* routines
|
||||
* @ndd: dimm container for the relevant label set
|
||||
* @nsindex_out: on return set to the currently active namespace index
|
||||
* @free: on return set to the free label bitmap in the index
|
||||
* @nslot: on return set to the number of slots in the label space
|
||||
*/
|
||||
static bool preamble_current(struct nvdimm_drvdata *ndd,
|
||||
struct nd_namespace_index **nsindex_out,
|
||||
unsigned long **free, u32 *nslot)
|
||||
{
|
||||
struct nd_namespace_index *nsindex;
|
||||
|
||||
nsindex = to_current_namespace_index(ndd);
|
||||
if (nsindex == NULL)
|
||||
return false;
|
||||
|
||||
*free = (unsigned long *) nsindex->free;
|
||||
*nslot = __le32_to_cpu(nsindex->nslot);
|
||||
*nsindex_out = nsindex;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
static char *nd_label_gen_id(struct nd_label_id *label_id, u8 *uuid, u32 flags)
|
||||
{
|
||||
if (!label_id || !uuid)
|
||||
return NULL;
|
||||
snprintf(label_id->id, ND_LABEL_ID_SIZE, "%s-%pUb",
|
||||
flags & NSLABEL_FLAG_LOCAL ? "blk" : "pmem", uuid);
|
||||
return label_id->id;
|
||||
}
|
||||
|
||||
static bool slot_valid(struct nd_namespace_label *nd_label, u32 slot)
|
||||
{
|
||||
/* check that we are written where we expect to be written */
|
||||
if (slot != __le32_to_cpu(nd_label->slot))
|
||||
return false;
|
||||
|
||||
/* check that DPA allocations are page aligned */
|
||||
if ((__le64_to_cpu(nd_label->dpa)
|
||||
| __le64_to_cpu(nd_label->rawsize)) % SZ_4K)
|
||||
return false;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd)
|
||||
{
|
||||
struct nd_namespace_index *nsindex;
|
||||
unsigned long *free;
|
||||
u32 nslot, slot;
|
||||
|
||||
if (!preamble_current(ndd, &nsindex, &free, &nslot))
|
||||
return 0; /* no label, nothing to reserve */
|
||||
|
||||
for_each_clear_bit_le(slot, free, nslot) {
|
||||
struct nd_namespace_label *nd_label;
|
||||
struct nd_region *nd_region = NULL;
|
||||
u8 label_uuid[NSLABEL_UUID_LEN];
|
||||
struct nd_label_id label_id;
|
||||
struct resource *res;
|
||||
u32 flags;
|
||||
|
||||
nd_label = nd_label_base(ndd) + slot;
|
||||
|
||||
if (!slot_valid(nd_label, slot))
|
||||
continue;
|
||||
|
||||
memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN);
|
||||
flags = __le32_to_cpu(nd_label->flags);
|
||||
nd_label_gen_id(&label_id, label_uuid, flags);
|
||||
res = nvdimm_allocate_dpa(ndd, &label_id,
|
||||
__le64_to_cpu(nd_label->dpa),
|
||||
__le64_to_cpu(nd_label->rawsize));
|
||||
nd_dbg_dpa(nd_region, ndd, res, "reserve\n");
|
||||
if (!res)
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,128 @@
|
|||
/*
|
||||
* Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of version 2 of the GNU General Public License as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that 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 __LABEL_H__
|
||||
#define __LABEL_H__
|
||||
|
||||
#include <linux/ndctl.h>
|
||||
#include <linux/sizes.h>
|
||||
#include <linux/io.h>
|
||||
|
||||
enum {
|
||||
NSINDEX_SIG_LEN = 16,
|
||||
NSINDEX_ALIGN = 256,
|
||||
NSINDEX_SEQ_MASK = 0x3,
|
||||
NSLABEL_UUID_LEN = 16,
|
||||
NSLABEL_NAME_LEN = 64,
|
||||
NSLABEL_FLAG_ROLABEL = 0x1, /* read-only label */
|
||||
NSLABEL_FLAG_LOCAL = 0x2, /* DIMM-local namespace */
|
||||
NSLABEL_FLAG_BTT = 0x4, /* namespace contains a BTT */
|
||||
NSLABEL_FLAG_UPDATING = 0x8, /* label being updated */
|
||||
BTT_ALIGN = 4096, /* all btt structures */
|
||||
BTTINFO_SIG_LEN = 16,
|
||||
BTTINFO_UUID_LEN = 16,
|
||||
BTTINFO_FLAG_ERROR = 0x1, /* error state (read-only) */
|
||||
BTTINFO_MAJOR_VERSION = 1,
|
||||
ND_LABEL_MIN_SIZE = 512 * 129, /* see sizeof_namespace_index() */
|
||||
ND_LABEL_ID_SIZE = 50,
|
||||
};
|
||||
|
||||
static const char NSINDEX_SIGNATURE[] = "NAMESPACE_INDEX\0";
|
||||
|
||||
/**
|
||||
* struct nd_namespace_index - label set superblock
|
||||
* @sig: NAMESPACE_INDEX\0
|
||||
* @flags: placeholder
|
||||
* @seq: sequence number for this index
|
||||
* @myoff: offset of this index in label area
|
||||
* @mysize: size of this index struct
|
||||
* @otheroff: offset of other index
|
||||
* @labeloff: offset of first label slot
|
||||
* @nslot: total number of label slots
|
||||
* @major: label area major version
|
||||
* @minor: label area minor version
|
||||
* @checksum: fletcher64 of all fields
|
||||
* @free[0]: bitmap, nlabel bits
|
||||
*
|
||||
* The size of free[] is rounded up so the total struct size is a
|
||||
* multiple of NSINDEX_ALIGN bytes. Any bits this allocates beyond
|
||||
* nlabel bits must be zero.
|
||||
*/
|
||||
struct nd_namespace_index {
|
||||
u8 sig[NSINDEX_SIG_LEN];
|
||||
__le32 flags;
|
||||
__le32 seq;
|
||||
__le64 myoff;
|
||||
__le64 mysize;
|
||||
__le64 otheroff;
|
||||
__le64 labeloff;
|
||||
__le32 nslot;
|
||||
__le16 major;
|
||||
__le16 minor;
|
||||
__le64 checksum;
|
||||
u8 free[0];
|
||||
};
|
||||
|
||||
/**
|
||||
* struct nd_namespace_label - namespace superblock
|
||||
* @uuid: UUID per RFC 4122
|
||||
* @name: optional name (NULL-terminated)
|
||||
* @flags: see NSLABEL_FLAG_*
|
||||
* @nlabel: num labels to describe this ns
|
||||
* @position: labels position in set
|
||||
* @isetcookie: interleave set cookie
|
||||
* @lbasize: LBA size in bytes or 0 for pmem
|
||||
* @dpa: DPA of NVM range on this DIMM
|
||||
* @rawsize: size of namespace
|
||||
* @slot: slot of this label in label area
|
||||
* @unused: must be zero
|
||||
*/
|
||||
struct nd_namespace_label {
|
||||
u8 uuid[NSLABEL_UUID_LEN];
|
||||
u8 name[NSLABEL_NAME_LEN];
|
||||
__le32 flags;
|
||||
__le16 nlabel;
|
||||
__le16 position;
|
||||
__le64 isetcookie;
|
||||
__le64 lbasize;
|
||||
__le64 dpa;
|
||||
__le64 rawsize;
|
||||
__le32 slot;
|
||||
__le32 unused;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct nd_label_id - identifier string for dpa allocation
|
||||
* @id: "{blk|pmem}-<namespace uuid>"
|
||||
*/
|
||||
struct nd_label_id {
|
||||
char id[ND_LABEL_ID_SIZE];
|
||||
};
|
||||
|
||||
/*
|
||||
* If the 'best' index is invalid, so is the 'next' index. Otherwise,
|
||||
* the next index is MOD(index+1, 2)
|
||||
*/
|
||||
static inline int nd_label_next_nsindex(int index)
|
||||
{
|
||||
if (index < 0)
|
||||
return -1;
|
||||
|
||||
return (index + 1) % 2;
|
||||
}
|
||||
|
||||
struct nvdimm_drvdata;
|
||||
int nd_label_validate(struct nvdimm_drvdata *ndd);
|
||||
void nd_label_copy(struct nvdimm_drvdata *ndd, struct nd_namespace_index *dst,
|
||||
struct nd_namespace_index *src);
|
||||
size_t sizeof_namespace_index(struct nvdimm_drvdata *ndd);
|
||||
#endif /* __LABEL_H__ */
|
||||
|
|
@ -16,11 +16,15 @@
|
|||
#include <linux/device.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/ndctl.h>
|
||||
#include "label.h"
|
||||
|
||||
struct nvdimm_drvdata {
|
||||
struct device *dev;
|
||||
int nsindex_size;
|
||||
struct nd_cmd_get_config_size nsarea;
|
||||
void *data;
|
||||
int ns_current, ns_next;
|
||||
struct resource dpa;
|
||||
};
|
||||
|
||||
struct nd_region_namespaces {
|
||||
|
|
@ -28,6 +32,37 @@ struct nd_region_namespaces {
|
|||
int active;
|
||||
};
|
||||
|
||||
static inline struct nd_namespace_index *to_namespace_index(
|
||||
struct nvdimm_drvdata *ndd, int i)
|
||||
{
|
||||
if (i < 0)
|
||||
return NULL;
|
||||
|
||||
return ndd->data + sizeof_namespace_index(ndd) * i;
|
||||
}
|
||||
|
||||
static inline struct nd_namespace_index *to_current_namespace_index(
|
||||
struct nvdimm_drvdata *ndd)
|
||||
{
|
||||
return to_namespace_index(ndd, ndd->ns_current);
|
||||
}
|
||||
|
||||
static inline struct nd_namespace_index *to_next_namespace_index(
|
||||
struct nvdimm_drvdata *ndd)
|
||||
{
|
||||
return to_namespace_index(ndd, ndd->ns_next);
|
||||
}
|
||||
|
||||
#define nd_dbg_dpa(r, d, res, fmt, arg...) \
|
||||
dev_dbg((r) ? &(r)->dev : (d)->dev, "%s: %.13s: %#llx @ %#llx " fmt, \
|
||||
(r) ? dev_name((d)->dev) : "", res ? res->name : "null", \
|
||||
(unsigned long long) (res ? resource_size(res) : 0), \
|
||||
(unsigned long long) (res ? res->start : 0), ##arg)
|
||||
|
||||
#define for_each_dpa_resource_safe(ndd, res, next) \
|
||||
for (res = (ndd)->dpa.child, next = res ? res->sibling : NULL; \
|
||||
res; res = next, next = next ? next->sibling : NULL)
|
||||
|
||||
struct nd_region {
|
||||
struct device dev;
|
||||
u16 ndr_mappings;
|
||||
|
|
@ -39,6 +74,15 @@ struct nd_region {
|
|||
struct nd_mapping mapping[0];
|
||||
};
|
||||
|
||||
/*
|
||||
* Lookup next in the repeating sequence of 01, 10, and 11.
|
||||
*/
|
||||
static inline unsigned nd_inc_seq(unsigned seq)
|
||||
{
|
||||
static const unsigned next[] = { 0, 2, 3, 1 };
|
||||
|
||||
return next[seq & 3];
|
||||
}
|
||||
enum nd_async_mode {
|
||||
ND_SYNC,
|
||||
ND_ASYNC,
|
||||
|
|
@ -58,4 +102,9 @@ int nd_region_register_namespaces(struct nd_region *nd_region, int *err);
|
|||
void nvdimm_bus_lock(struct device *dev);
|
||||
void nvdimm_bus_unlock(struct device *dev);
|
||||
bool is_nvdimm_bus_locked(struct device *dev);
|
||||
int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd);
|
||||
void nvdimm_free_dpa(struct nvdimm_drvdata *ndd, struct resource *res);
|
||||
struct resource *nvdimm_allocate_dpa(struct nvdimm_drvdata *ndd,
|
||||
struct nd_label_id *label_id, resource_size_t start,
|
||||
resource_size_t n);
|
||||
#endif /* __ND_H__ */
|
||||
|
|
|
|||
|
|
@ -175,7 +175,6 @@ static inline const char *nvdimm_cmd_name(unsigned cmd)
|
|||
#define ND_IOCTL_ARS_STATUS _IOWR(ND_IOCTL, ND_CMD_ARS_STATUS,\
|
||||
struct nd_cmd_ars_status)
|
||||
|
||||
|
||||
#define ND_DEVICE_DIMM 1 /* nd_dimm: container for "config data" */
|
||||
#define ND_DEVICE_REGION_PMEM 2 /* nd_region: (parent of PMEM namespaces) */
|
||||
#define ND_DEVICE_REGION_BLK 3 /* nd_region: (parent of BLK namespaces) */
|
||||
|
|
|
|||
Loading…
Reference in New Issue