[PATCH v2 06/20] libnd: ndctl.h, the nd ioctl abi

From: Dan Williams
Date: Tue Apr 28 2015 - 14:27:40 EST

Most configuration of the nd-subsystem is done via nd-sysfs attributes.
However, some nd buses, particularly the ACPI.NFIT bus, define a small
set of messages that can be passed to the platform. For convenience we
derivce the initial nd-ioctl-command formats directly from the NFIT DSM
formats.

ND_CMD_SMART: media health and diagnostics
ND_CMD_GET_CONFIG_SIZE: size of the label space
ND_CMD_GET_CONFIG_DATA: read label space
ND_CMD_SET_CONFIG_DATA: write label space
ND_CMD_VENDOR: vendor-specific command passthrough
ND_CMD_ARS_CAP: report address-range-scrubbing capabilities
ND_CMD_START_ARS: initiate scrubbing
ND_CMD_QUERY_ARS: report on scrubbing state
ND_CMD_SMART_THRESHOLD: configure alarm thresholds for smart events

If a platform later defines different commands than this set it is
straightforward to extend support to those formats.

Most of the commands target a specific dimm. However, the
address-range-scrubbing commands target the bus. The 'commands'
attribute in sysfs of an nd-bus, or an nd-dimm enumerate the supported
commands for that object.

Cc: <linux-acpi@xxxxxxxxxxxxxxx>
Cc: Robert Moore <robert.moore@xxxxxxxxx>
Cc: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Reported-by: Nicholas Moulin <nicholas.w.moulin@xxxxxxxxxxxxxxx>
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
---
drivers/block/nd/Kconfig | 12 ++
drivers/block/nd/acpi.c | 237 ++++++++++++++++++++++++++++++
drivers/block/nd/acpi_nfit.h | 3
drivers/block/nd/bus.c | 324 ++++++++++++++++++++++++++++++++++++++++-
drivers/block/nd/core.c | 16 ++
drivers/block/nd/dimm_devs.c | 38 ++++-
drivers/block/nd/libnd.h | 25 +++
drivers/block/nd/nd-private.h | 3
drivers/block/nd/test/nfit.c | 78 ++++++++++
include/uapi/linux/Kbuild | 1
include/uapi/linux/ndctl.h | 178 +++++++++++++++++++++++
11 files changed, 903 insertions(+), 12 deletions(-)
create mode 100644 include/uapi/linux/ndctl.h

diff --git a/drivers/block/nd/Kconfig b/drivers/block/nd/Kconfig
index 09f0135147ca..d2d84451e82c 100644
--- a/drivers/block/nd/Kconfig
+++ b/drivers/block/nd/Kconfig
@@ -37,6 +37,18 @@ config ND_ACPI
addition to storage devices this also enables libnd craft
ACPI._DSM messages for platform/dimm configuration.

+config ND_ACPI_DEBUG
+ bool "ACPI: Extra nd_acpi debugging"
+ depends on ND_ACPI
+ depends on DYNAMIC_DEBUG
+ default n
+ help
+ Enabling this option causes the nd_acpi driver to dump the
+ input and output buffers of _DSM operations on the ACPI0012
+ device and its children. This can be very verbose, so leave
+ it disabled unless you are debugging a hardware / firmware
+ issue.
+
config NFIT_TEST
tristate "NFIT TEST: Manufactured NFIT for interface testing"
depends on DMA_CMA
diff --git a/drivers/block/nd/acpi.c b/drivers/block/nd/acpi.c
index af6684341c9b..c46e166695f7 100644
--- a/drivers/block/nd/acpi.c
+++ b/drivers/block/nd/acpi.c
@@ -12,6 +12,7 @@
*/
#include <linux/list_sort.h>
#include <linux/module.h>
+#include <linux/ndctl.h>
#include <linux/list.h>
#include <linux/acpi.h>
#include "acpi_nfit.h"
@@ -25,11 +26,160 @@ enum {
NFIT_ACPI_NOTIFY_TABLE = 0x80,
};

+static u8 nd_acpi_uuids[2][16]; /* initialized at nd_acpi_init */
+
+static u8 *nd_acpi_bus_uuid(void)
+{
+ return nd_acpi_uuids[0];
+}
+
+static u8 *nd_acpi_dimm_uuid(void)
+{
+ return nd_acpi_uuids[1];
+}
+
+static struct acpi_nfit_desc *to_acpi_nfit_desc(struct nd_bus_descriptor *nd_desc)
+{
+ return container_of(nd_desc, struct acpi_nfit_desc, nd_desc);
+}
+
+static struct acpi_device *to_acpi_dev(struct acpi_nfit_desc *acpi_desc)
+{
+ struct nd_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
+
+ /*
+ * If provider == 'ACPI.NFIT' we can assume 'dev' is a struct
+ * acpi_device.
+ */
+ if (!nd_desc->provider_name
+ || strcmp(nd_desc->provider_name, "ACPI.NFIT") != 0)
+ return NULL;
+
+ return to_acpi_device(acpi_desc->dev);
+}
+
static int nd_acpi_ctl(struct nd_bus_descriptor *nd_desc,
struct nd_dimm *nd_dimm, unsigned int cmd, void *buf,
unsigned int buf_len)
{
- return -ENOTTY;
+ struct acpi_nfit_desc *acpi_desc = to_acpi_nfit_desc(nd_desc);
+ const struct nd_cmd_desc const *desc = NULL;
+ union acpi_object in_obj, in_buf, *out_obj;
+ struct device *dev = acpi_desc->dev;
+ const char *cmd_name, *dimm_name;
+ unsigned long dsm_mask;
+ acpi_handle handle;
+ u32 offset;
+ int rc, i;
+ u8 *uuid;
+
+ if (nd_dimm) {
+ struct nfit_mem *nfit_mem = nd_dimm_provider_data(nd_dimm);
+ struct acpi_device *adev = nfit_mem->adev;
+
+ if (!adev)
+ return -ENOTTY;
+ dimm_name = dev_name(&adev->dev);
+ cmd_name = nd_dimm_cmd_name(cmd);
+ dsm_mask = nfit_mem->dsm_mask;
+ desc = nd_cmd_dimm_desc(cmd);
+ uuid = nd_acpi_dimm_uuid();
+ handle = adev->handle;
+ } else {
+ struct acpi_device *adev = to_acpi_dev(acpi_desc);
+
+ cmd_name = nd_bus_cmd_name(cmd);
+ dsm_mask = nd_desc->dsm_mask;
+ desc = nd_cmd_bus_desc(cmd);
+ uuid = nd_acpi_bus_uuid();
+ handle = adev->handle;
+ dimm_name = "bus";
+ }
+
+ if (!desc || (cmd && (desc->out_num + desc->in_num == 0)))
+ return -ENOTTY;
+
+ if (!test_bit(cmd, &dsm_mask))
+ return -ENOTTY;
+
+ in_obj.type = ACPI_TYPE_PACKAGE;
+ in_obj.package.count = 1;
+ in_obj.package.elements = &in_buf;
+ in_buf.type = ACPI_TYPE_BUFFER;
+ in_buf.buffer.pointer = buf;
+ in_buf.buffer.length = 0;
+
+ /* libnd has already validated the input envelope */
+ for (i = 0; i < desc->in_num; i++)
+ in_buf.buffer.length += nd_cmd_in_size(nd_dimm, cmd, desc, i, buf);
+
+ dev_dbg(dev, "%s:%s cmd: %s input length: %d\n", __func__, dimm_name,
+ cmd_name, in_buf.buffer.length);
+ if (IS_ENABLED(CONFIG_ND_ACPI_DEBUG))
+ print_hex_dump_debug(cmd_name, DUMP_PREFIX_OFFSET, 4,
+ 4, in_buf.buffer.pointer, min_t(u32, 128,
+ in_buf.buffer.length), true);
+
+ out_obj = acpi_evaluate_dsm(handle, uuid, 1, cmd, &in_obj);
+ if (!out_obj) {
+ dev_dbg(dev, "%s:%s _DSM failed cmd: %s\n", __func__, dimm_name,
+ cmd_name);
+ return -EINVAL;
+ }
+
+ if (out_obj->package.type != ACPI_TYPE_BUFFER) {
+ dev_dbg(dev, "%s:%s unexpected output object type cmd: %s type: %d\n",
+ __func__, dimm_name, cmd_name, out_obj->type);
+ rc = -EINVAL;
+ goto out;
+ }
+
+ dev_dbg(dev, "%s:%s cmd: %s output length: %d\n", __func__, dimm_name,
+ cmd_name, out_obj->buffer.length);
+ if (IS_ENABLED(CONFIG_ND_ACPI_DEBUG))
+ print_hex_dump_debug(cmd_name, DUMP_PREFIX_OFFSET, 4,
+ 4, out_obj->buffer.pointer, min_t(u32, 128,
+ out_obj->buffer.length), true);
+
+ for (i = 0, offset = 0; i < desc->out_num; i++) {
+ u32 out_size = nd_cmd_out_size(nd_dimm, cmd, desc, i, buf,
+ (u32 *) out_obj->buffer.pointer);
+
+ if (offset + out_size > out_obj->buffer.length) {
+ dev_dbg(dev, "%s:%s output object underflow cmd: %s field: %d\n",
+ __func__, dimm_name, cmd_name, i);
+ break;
+ }
+
+ if (in_buf.buffer.length + offset + out_size > buf_len) {
+ dev_dbg(dev, "%s:%s output overrun cmd: %s field: %d\n",
+ __func__, dimm_name, cmd_name, i);
+ rc = -ENXIO;
+ goto out;
+ }
+ memcpy(buf + in_buf.buffer.length + offset,
+ out_obj->buffer.pointer + offset, out_size);
+ offset += out_size;
+ }
+ if (offset + in_buf.buffer.length < buf_len) {
+ if (i >= 1) {
+ /*
+ * status valid, return the number of bytes left
+ * unfilled in the output buffer
+ */
+ rc = buf_len - offset - in_buf.buffer.length;
+ } else {
+ dev_err(dev, "%s:%s underrun cmd: %s buf_len: %d out_len: %d\n",
+ __func__, dimm_name, cmd_name, buf_len, offset);
+ rc = -ENXIO;
+ }
+ } else
+ rc = 0;
+
+ out:
+ ACPI_FREE(out_obj);
+
+ return rc;
}

static const char *spa_type_name(u16 type)
@@ -476,6 +626,7 @@ static struct attribute_group nd_acpi_dimm_attribute_group = {
};

static const struct attribute_group *nd_acpi_dimm_attribute_groups[] = {
+ &nd_dimm_attribute_group,
&nd_acpi_dimm_attribute_group,
NULL,
};
@@ -492,6 +643,50 @@ static struct nd_dimm *nd_acpi_dimm_by_handle(struct acpi_nfit_desc *acpi_desc,
return NULL;
}

+static int nd_acpi_add_dimm(struct acpi_nfit_desc *acpi_desc,
+ struct nfit_mem *nfit_mem, u32 nfit_handle)
+{
+ struct acpi_device *adev, *adev_dimm;
+ struct device *dev = acpi_desc->dev;
+ u8 *uuid = nd_acpi_dimm_uuid();
+ unsigned long long sta;
+ int i, rc = -ENODEV;
+ acpi_status status;
+
+ nfit_mem->dsm_mask = acpi_desc->dimm_dsm_force_en;
+ adev = to_acpi_dev(acpi_desc);
+ if (!adev)
+ return 0;
+
+ adev_dimm = acpi_find_child_device(adev, nfit_handle, false);
+ nfit_mem->adev = adev_dimm;
+ if (!adev_dimm) {
+ dev_err(dev, "no ACPI.NFIT device with _ADR %#x, disabling...\n",
+ nfit_handle);
+ return -ENODEV;
+ }
+
+ status = acpi_evaluate_integer(adev_dimm->handle, "_STA", NULL, &sta);
+ if (status == AE_NOT_FOUND) {
+ dev_dbg(dev, "%s missing _STA, assuming enabled...\n",
+ dev_name(&adev_dimm->dev));
+ rc = 0;
+ } else if (ACPI_FAILURE(status))
+ dev_err(dev, "%s failed to retrieve_STA, disabling...\n",
+ dev_name(&adev_dimm->dev));
+ else if ((sta & ACPI_STA_DEVICE_ENABLED) == 0)
+ dev_info(dev, "%s disabled by firmware\n",
+ dev_name(&adev_dimm->dev));
+ else
+ rc = 0;
+
+ for (i = ND_CMD_SMART; i <= ND_CMD_VENDOR; i++)
+ if (acpi_check_dsm(adev_dimm->handle, uuid, 1, 1ULL << i))
+ set_bit(i, &nfit_mem->dsm_mask);
+
+ return rc;
+}
+
static int nd_acpi_register_dimms(struct acpi_nfit_desc *acpi_desc)
{
struct nfit_mem *nfit_mem;
@@ -500,6 +695,7 @@ static int nd_acpi_register_dimms(struct acpi_nfit_desc *acpi_desc)
struct nd_dimm *nd_dimm;
unsigned long flags = 0;
u32 nfit_handle;
+ int rc;

nfit_handle = __to_nfit_memdev(nfit_mem)->nfit_handle;
nd_dimm = nd_acpi_dimm_by_handle(acpi_desc, nfit_handle);
@@ -516,8 +712,13 @@ static int nd_acpi_register_dimms(struct acpi_nfit_desc *acpi_desc)
if (nfit_mem->bdw && nfit_mem->memdev_pmem)
flags |= NDD_ALIASING;

+ rc = nd_acpi_add_dimm(acpi_desc, nfit_mem, nfit_handle);
+ if (rc)
+ continue;
+
nd_dimm = nd_dimm_create(acpi_desc->nd_bus, nfit_mem,
- nd_acpi_dimm_attribute_groups, flags);
+ nd_acpi_dimm_attribute_groups,
+ flags, &nfit_mem->dsm_mask);
if (!nd_dimm)
return -ENOMEM;

@@ -527,6 +728,22 @@ static int nd_acpi_register_dimms(struct acpi_nfit_desc *acpi_desc)
return 0;
}

+static void nd_acpi_init_dsms(struct acpi_nfit_desc *acpi_desc)
+{
+ struct nd_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
+ u8 *uuid = nd_acpi_bus_uuid();
+ struct acpi_device *adev;
+ int i;
+
+ adev = to_acpi_dev(acpi_desc);
+ if (!adev)
+ return;
+
+ for (i = ND_CMD_ARS_CAP; i <= ND_CMD_ARS_QUERY; i++)
+ if (acpi_check_dsm(adev->handle, uuid, 1, 1ULL << i))
+ set_bit(i, &nd_desc->dsm_mask);
+}
+
int nd_acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, acpi_size sz)
{
struct device *dev = acpi_desc->dev;
@@ -564,6 +781,8 @@ int nd_acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, acpi_size sz)
if (nfit_mem_init(acpi_desc) != 0)
return -ENOMEM;

+ nd_acpi_init_dsms(acpi_desc);
+
return nd_acpi_register_dimms(acpi_desc);
}
EXPORT_SYMBOL_GPL(nd_acpi_nfit_init);
@@ -641,6 +860,14 @@ static struct acpi_driver nd_acpi_driver = {

static __init int nd_acpi_init(void)
{
+ char *uuids[] = {
+ /* bus interface */
+ "2f10e7a4-9e91-11e4-89d3-123b93f75cba",
+ /* per-dimm interface */
+ "4309ac30-0d11-11e4-9191-0800200c9a66",
+ };
+ int i;
+
BUILD_BUG_ON(sizeof(struct acpi_nfit) != 40);
BUILD_BUG_ON(sizeof(struct acpi_nfit_spa) != 56);
BUILD_BUG_ON(sizeof(struct acpi_nfit_memdev) != 48);
@@ -649,6 +876,12 @@ static __init int nd_acpi_init(void)
BUILD_BUG_ON(sizeof(struct acpi_nfit_dcr) != 80);
BUILD_BUG_ON(sizeof(struct acpi_nfit_bdw) != 40);

+ for (i = 0; i < ARRAY_SIZE(uuids); i++)
+ if (acpi_str_to_uuid(uuids[i], nd_acpi_uuids[i]) != AE_OK) {
+ WARN_ON_ONCE(1);
+ return -ENXIO;
+ }
+
return acpi_bus_register_driver(&nd_acpi_driver);
}

diff --git a/drivers/block/nd/acpi_nfit.h b/drivers/block/nd/acpi_nfit.h
index 00aaaee5953b..2faac336c07d 100644
--- a/drivers/block/nd/acpi_nfit.h
+++ b/drivers/block/nd/acpi_nfit.h
@@ -241,6 +241,8 @@ struct nfit_mem {
struct acpi_nfit_spa *spa_dcr;
struct acpi_nfit_spa *spa_bdw;
struct list_head list;
+ struct acpi_device *adev;
+ unsigned long dsm_mask;
};

struct acpi_nfit_desc {
@@ -253,6 +255,7 @@ struct acpi_nfit_desc {
struct list_head bdws;
struct nd_bus *nd_bus;
struct device *dev;
+ unsigned long dimm_dsm_force_en;
};

static inline struct acpi_nfit_memdev *__to_nfit_memdev(struct nfit_mem *nfit_mem)
diff --git a/drivers/block/nd/bus.c b/drivers/block/nd/bus.c
index ee56aa1ab2ad..a271e01af4a9 100644
--- a/drivers/block/nd/bus.c
+++ b/drivers/block/nd/bus.c
@@ -11,14 +11,18 @@
* General Public License for more details.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#include <linux/vmalloc.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/async.h>
+#include <linux/ndctl.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/io.h>
+#include <linux/mm.h>
#include "nd-private.h"

+int nd_dimm_major;
static int nd_bus_major;
static struct class *nd_class;

@@ -47,19 +51,323 @@ void nd_bus_destroy_ndctl(struct nd_bus *nd_bus)
device_destroy(nd_class, MKDEV(nd_bus_major, nd_bus->id));
}

+static const struct nd_cmd_desc const __nd_cmd_dimm_descs[] = {
+ [ND_CMD_IMPLEMENTED] = { },
+ [ND_CMD_SMART] = {
+ .out_num = 2,
+ .out_sizes = { 4, 8, },
+ },
+ [ND_CMD_SMART_THRESHOLD] = {
+ .out_num = 2,
+ .out_sizes = { 4, 8, },
+ },
+ [ND_CMD_DIMM_FLAGS] = {
+ .out_num = 2,
+ .out_sizes = { 4, 4 },
+ },
+ [ND_CMD_GET_CONFIG_SIZE] = {
+ .out_num = 3,
+ .out_sizes = { 4, 4, 4, },
+ },
+ [ND_CMD_GET_CONFIG_DATA] = {
+ .in_num = 2,
+ .in_sizes = { 4, 4, },
+ .out_num = 2,
+ .out_sizes = { 4, UINT_MAX, },
+ },
+ [ND_CMD_SET_CONFIG_DATA] = {
+ .in_num = 3,
+ .in_sizes = { 4, 4, UINT_MAX, },
+ .out_num = 1,
+ .out_sizes = { 4, },
+ },
+ [ND_CMD_VENDOR] = {
+ .in_num = 3,
+ .in_sizes = { 4, 4, UINT_MAX, },
+ .out_num = 3,
+ .out_sizes = { 4, 4, UINT_MAX, },
+ },
+};
+
+struct nd_cmd_desc const *nd_cmd_dimm_desc(int cmd)
+{
+ if (cmd < ARRAY_SIZE(__nd_cmd_dimm_descs))
+ return &__nd_cmd_dimm_descs[cmd];
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(nd_cmd_dimm_desc);
+
+static const struct nd_cmd_desc const __nd_cmd_bus_descs[] = {
+ [ND_CMD_IMPLEMENTED] = { },
+ [ND_CMD_ARS_CAP] = {
+ .in_num = 2,
+ .in_sizes = { 8, 8, },
+ .out_num = 2,
+ .out_sizes = { 4, 4, },
+ },
+ [ND_CMD_ARS_START] = {
+ .in_num = 4,
+ .in_sizes = { 8, 8, 2, 6, },
+ .out_num = 1,
+ .out_sizes = { 4, },
+ },
+ [ND_CMD_ARS_QUERY] = {
+ .out_num = 2,
+ .out_sizes = { 4, UINT_MAX, },
+ },
+};
+
+const struct nd_cmd_desc *nd_cmd_bus_desc(int cmd)
+{
+ if (cmd < ARRAY_SIZE(__nd_cmd_bus_descs))
+ return &__nd_cmd_bus_descs[cmd];
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(nd_cmd_bus_desc);
+
+u32 nd_cmd_in_size(struct nd_dimm *nd_dimm, int cmd,
+ const struct nd_cmd_desc *desc, int idx, void *buf)
+{
+ if (idx >= desc->in_num)
+ return UINT_MAX;
+
+ if (desc->in_sizes[idx] < UINT_MAX)
+ return desc->in_sizes[idx];
+
+ if (nd_dimm && cmd == ND_CMD_SET_CONFIG_DATA && idx == 2) {
+ struct nd_cmd_set_config_hdr *hdr = buf;
+
+ return hdr->in_length;
+ } else if (nd_dimm && cmd == ND_CMD_VENDOR && idx == 2) {
+ struct nd_cmd_vendor_hdr *hdr = buf;
+
+ return hdr->in_length;
+ }
+
+ return UINT_MAX;
+}
+EXPORT_SYMBOL_GPL(nd_cmd_in_size);
+
+u32 nd_cmd_out_size(struct nd_dimm *nd_dimm, int cmd,
+ const struct nd_cmd_desc *desc, int idx, const u32 *in_field,
+ const u32 *out_field)
+{
+ if (idx >= desc->out_num)
+ return UINT_MAX;
+
+ if (desc->out_sizes[idx] < UINT_MAX)
+ return desc->out_sizes[idx];
+
+ if (nd_dimm && cmd == ND_CMD_GET_CONFIG_DATA && idx == 1)
+ return in_field[1];
+ else if (nd_dimm && cmd == ND_CMD_VENDOR && idx == 2)
+ return out_field[1];
+ else if (!nd_dimm && cmd == ND_CMD_ARS_QUERY && idx == 1)
+ return ND_CMD_ARS_QUERY_MAX;
+
+ return UINT_MAX;
+}
+EXPORT_SYMBOL_GPL(nd_cmd_out_size);
+
+static int __nd_ioctl(struct nd_bus *nd_bus, struct nd_dimm *nd_dimm,
+ int read_only, unsigned int ioctl_cmd, unsigned long arg)
+{
+ struct nd_bus_descriptor *nd_desc = nd_bus->nd_desc;
+ size_t buf_len = 0, in_len = 0, out_len = 0;
+ static char out_env[ND_CMD_MAX_ENVELOPE];
+ static char in_env[ND_CMD_MAX_ENVELOPE];
+ const struct nd_cmd_desc *desc = NULL;
+ unsigned int cmd = _IOC_NR(ioctl_cmd);
+ void __user *p = (void __user *) arg;
+ struct device *dev = &nd_bus->dev;
+ const char *cmd_name, *dimm_name;
+ unsigned long dsm_mask;
+ void *buf;
+ int rc, i;
+
+ if (nd_dimm) {
+ desc = nd_cmd_dimm_desc(cmd);
+ cmd_name = nd_dimm_cmd_name(cmd);
+ dsm_mask = nd_dimm->dsm_mask ? *(nd_dimm->dsm_mask) : 0;
+ dimm_name = dev_name(&nd_dimm->dev);
+ } else {
+ desc = nd_cmd_bus_desc(cmd);
+ cmd_name = nd_bus_cmd_name(cmd);
+ dsm_mask = nd_desc->dsm_mask;
+ dimm_name = "bus";
+ }
+
+ if (!desc || (desc->out_num + desc->in_num == 0) ||
+ !test_bit(cmd, &dsm_mask))
+ return -ENOTTY;
+
+ /* fail write commands (when read-only) */
+ if (read_only)
+ switch (ioctl_cmd) {
+ case ND_IOCTL_VENDOR:
+ case ND_IOCTL_SET_CONFIG_DATA:
+ case ND_IOCTL_ARS_START:
+ dev_dbg(&nd_bus->dev, "'%s' command while read-only.\n",
+ nd_dimm ? nd_dimm_cmd_name(cmd)
+ : nd_bus_cmd_name(cmd));
+ return -EPERM;
+ default:
+ break;
+ }
+
+ /* process an input envelope */
+ for (i = 0; i < desc->in_num; i++) {
+ u32 in_size, copy;
+
+ in_size = nd_cmd_in_size(nd_dimm, cmd, desc, i, in_env);
+ if (in_size == UINT_MAX) {
+ dev_err(dev, "%s:%s unknown input size cmd: %s field: %d\n",
+ __func__, dimm_name, cmd_name, i);
+ return -ENXIO;
+ }
+ if (!access_ok(VERIFY_READ, p + in_len, in_size))
+ return -EFAULT;
+ if (in_len < sizeof(in_env))
+ copy = min_t(u32, sizeof(in_env) - in_len, in_size);
+ else
+ copy = 0;
+ if (copy && copy_from_user(&in_env[in_len], p + in_len, copy))
+ return -EFAULT;
+ in_len += in_size;
+ }
+
+ /* process an output envelope */
+ for (i = 0; i < desc->out_num; i++) {
+ u32 out_size = nd_cmd_out_size(nd_dimm, cmd, desc, i,
+ (u32 *) in_env, (u32 *) out_env);
+ u32 copy;
+
+ if (out_size == UINT_MAX) {
+ dev_dbg(dev, "%s:%s unknown output size cmd: %s field: %d\n",
+ __func__, dimm_name, cmd_name, i);
+ return -EFAULT;
+ }
+ if (!access_ok(VERIFY_WRITE, p + in_len + out_len, out_size))
+ return -EFAULT;
+ if (out_len < sizeof(out_env))
+ copy = min_t(u32, sizeof(out_env) - out_len, out_size);
+ else
+ copy = 0;
+ if (copy && copy_from_user(&out_env[out_len], p + in_len + out_len,
+ copy))
+ return -EFAULT;
+ out_len += out_size;
+ }
+
+ buf_len = out_len + in_len;
+ if (!access_ok(VERIFY_WRITE, p, sizeof(buf_len)))
+ return -EFAULT;
+
+ if (buf_len > ND_IOCTL_MAX_BUFLEN) {
+ dev_dbg(dev, "%s:%s cmd: %s buf_len: %zd > %d\n", __func__,
+ dimm_name, cmd_name, buf_len,
+ ND_IOCTL_MAX_BUFLEN);
+ return -EINVAL;
+ }
+
+ buf = vmalloc(buf_len);
+ if (!buf)
+ return -ENOMEM;
+
+ if (copy_from_user(buf, p, buf_len)) {
+ rc = -EFAULT;
+ goto out;
+ }
+
+ rc = nd_desc->ndctl(nd_desc, nd_dimm, cmd, buf, buf_len);
+ if (rc < 0)
+ goto out;
+ if (copy_to_user(p, buf, buf_len))
+ rc = -EFAULT;
+ out:
+ vfree(buf);
+ return rc;
+}
+
static long nd_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
- return -ENXIO;
+ long id = (long) file->private_data;
+ int rc = -ENXIO, read_only;
+ struct nd_bus *nd_bus;
+
+ read_only = (O_RDWR != (file->f_flags & O_ACCMODE));
+ mutex_lock(&nd_bus_list_mutex);
+ list_for_each_entry(nd_bus, &nd_bus_list, list) {
+ if (nd_bus->id == id) {
+ rc = __nd_ioctl(nd_bus, NULL, read_only, cmd, arg);
+ break;
+ }
+ }
+ mutex_unlock(&nd_bus_list_mutex);
+
+ return rc;
+}
+
+static int match_dimm(struct device *dev, void *data)
+{
+ long id = (long) data;
+
+ if (is_nd_dimm(dev)) {
+ struct nd_dimm *nd_dimm = to_nd_dimm(dev);
+
+ return nd_dimm->id == id;
+ }
+
+ return 0;
+}
+
+static long nd_dimm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ int rc = -ENXIO, read_only;
+ struct nd_bus *nd_bus;
+
+ read_only = (O_RDWR != (file->f_flags & O_ACCMODE));
+ mutex_lock(&nd_bus_list_mutex);
+ list_for_each_entry(nd_bus, &nd_bus_list, list) {
+ struct device *dev = device_find_child(&nd_bus->dev,
+ file->private_data, match_dimm);
+
+ if (!dev)
+ continue;
+
+ rc = __nd_ioctl(nd_bus, to_nd_dimm(dev), read_only, cmd, arg);
+ put_device(dev);
+ break;
+ }
+ mutex_unlock(&nd_bus_list_mutex);
+
+ return rc;
+}
+
+static int nd_open(struct inode *inode, struct file *file)
+{
+ long minor = iminor(inode);
+
+ file->private_data = (void *) minor;
+ return 0;
}

static const struct file_operations nd_bus_fops = {
.owner = THIS_MODULE,
- .open = nonseekable_open,
+ .open = nd_open,
.unlocked_ioctl = nd_ioctl,
.compat_ioctl = nd_ioctl,
.llseek = noop_llseek,
};

+static const struct file_operations nd_dimm_fops = {
+ .owner = THIS_MODULE,
+ .open = nd_open,
+ .unlocked_ioctl = nd_dimm_ioctl,
+ .compat_ioctl = nd_dimm_ioctl,
+ .llseek = noop_llseek,
+};
+
int __init nd_bus_init(void)
{
int rc;
@@ -70,9 +378,14 @@ int __init nd_bus_init(void)

rc = register_chrdev(0, "ndctl", &nd_bus_fops);
if (rc < 0)
- goto err_chrdev;
+ goto err_bus_chrdev;
nd_bus_major = rc;

+ rc = register_chrdev(0, "dimmctl", &nd_dimm_fops);
+ if (rc < 0)
+ goto err_dimm_chrdev;
+ nd_dimm_major = rc;
+
nd_class = class_create(THIS_MODULE, "nd");
if (IS_ERR(nd_class))
goto err_class;
@@ -80,8 +393,10 @@ int __init nd_bus_init(void)
return 0;

err_class:
+ unregister_chrdev(nd_dimm_major, "dimmctl");
+ err_dimm_chrdev:
unregister_chrdev(nd_bus_major, "ndctl");
- err_chrdev:
+ err_bus_chrdev:
bus_unregister(&nd_bus_type);

return rc;
@@ -91,5 +406,6 @@ void __exit nd_bus_exit(void)
{
class_destroy(nd_class);
unregister_chrdev(nd_bus_major, "ndctl");
+ unregister_chrdev(nd_dimm_major, "dimmctl");
bus_unregister(&nd_bus_type);
}
diff --git a/drivers/block/nd/core.c b/drivers/block/nd/core.c
index 24046db897c1..b14bf47dc292 100644
--- a/drivers/block/nd/core.c
+++ b/drivers/block/nd/core.c
@@ -13,6 +13,7 @@
#include <linux/export.h>
#include <linux/module.h>
#include <linux/device.h>
+#include <linux/ndctl.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include "nd-private.h"
@@ -59,6 +60,20 @@ struct nd_bus *walk_to_nd_bus(struct device *nd_dev)
return NULL;
}

+static ssize_t commands_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int cmd, len = 0;
+ struct nd_bus *nd_bus = to_nd_bus(dev);
+ struct nd_bus_descriptor *nd_desc = nd_bus->nd_desc;
+
+ for_each_set_bit(cmd, &nd_desc->dsm_mask, BITS_PER_LONG)
+ len += sprintf(buf + len, "%s ", nd_bus_cmd_name(cmd));
+ len += sprintf(buf + len, "\n");
+ return len;
+}
+static DEVICE_ATTR_RO(commands);
+
static const char *nd_bus_provider(struct nd_bus *nd_bus)
{
struct nd_bus_descriptor *nd_desc = nd_bus->nd_desc;
@@ -82,6 +97,7 @@ static ssize_t provider_show(struct device *dev,
static DEVICE_ATTR_RO(provider);

static struct attribute *nd_bus_attributes[] = {
+ &dev_attr_commands.attr,
&dev_attr_provider.attr,
NULL,
};
diff --git a/drivers/block/nd/dimm_devs.c b/drivers/block/nd/dimm_devs.c
index 19b081392f2f..3fa26f61c3db 100644
--- a/drivers/block/nd/dimm_devs.c
+++ b/drivers/block/nd/dimm_devs.c
@@ -12,6 +12,7 @@
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/device.h>
+#include <linux/ndctl.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/fs.h>
@@ -33,7 +34,7 @@ static struct device_type nd_dimm_device_type = {
.release = nd_dimm_release,
};

-static bool is_nd_dimm(struct device *dev)
+bool is_nd_dimm(struct device *dev)
{
return dev->type == &nd_dimm_device_type;
}
@@ -55,12 +56,41 @@ EXPORT_SYMBOL_GPL(nd_dimm_name);

void *nd_dimm_provider_data(struct nd_dimm *nd_dimm)
{
- return nd_dimm->provider_data;
+ if (nd_dimm)
+ return nd_dimm->provider_data;
+ return NULL;
}
EXPORT_SYMBOL_GPL(nd_dimm_provider_data);

+static ssize_t commands_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct nd_dimm *nd_dimm = to_nd_dimm(dev);
+ int cmd, len = 0;
+
+ if (!nd_dimm->dsm_mask)
+ return sprintf(buf, "\n");
+
+ for_each_set_bit(cmd, nd_dimm->dsm_mask, BITS_PER_LONG)
+ len += sprintf(buf + len, "%s ", nd_dimm_cmd_name(cmd));
+ len += sprintf(buf + len, "\n");
+ return len;
+}
+static DEVICE_ATTR_RO(commands);
+
+static struct attribute *nd_dimm_attributes[] = {
+ &dev_attr_commands.attr,
+ NULL,
+};
+
+struct attribute_group nd_dimm_attribute_group = {
+ .attrs = nd_dimm_attributes,
+};
+EXPORT_SYMBOL_GPL(nd_dimm_attribute_group);
+
struct nd_dimm *nd_dimm_create(struct nd_bus *nd_bus, void *provider_data,
- const struct attribute_group **groups, unsigned long flags)
+ const struct attribute_group **groups, unsigned long flags,
+ unsigned long *dsm_mask)
{
struct nd_dimm *nd_dimm = kzalloc(sizeof(*nd_dimm), GFP_KERNEL);
struct device *dev;
@@ -75,12 +105,14 @@ struct nd_dimm *nd_dimm_create(struct nd_bus *nd_bus, void *provider_data,
}
nd_dimm->provider_data = provider_data;
nd_dimm->flags = flags;
+ nd_dimm->dsm_mask = dsm_mask;

dev = &nd_dimm->dev;
dev_set_name(dev, "nmem%d", nd_dimm->id);
dev->parent = &nd_bus->dev;
dev->type = &nd_dimm_device_type;
dev->bus = &nd_bus_type;
+ dev->devt = MKDEV(nd_dimm_major, nd_dimm->id);
dev->groups = groups;
if (device_register(dev) != 0) {
put_device(dev);
diff --git a/drivers/block/nd/libnd.h b/drivers/block/nd/libnd.h
index 4f8f2ebbcf7b..23dae8c1e65b 100644
--- a/drivers/block/nd/libnd.h
+++ b/drivers/block/nd/libnd.h
@@ -14,13 +14,21 @@
*/
#ifndef __LIBND_H__
#define __LIBND_H__
+#include <linux/sizes.h>

enum {
/* when a dimm supports both PMEM and BLK access a label is required */
NDD_ALIASING = 1 << 0,
+
+ /* need to set a limit somewhere, but yes, this is likely overkill */
+ ND_IOCTL_MAX_BUFLEN = SZ_4M,
+ ND_CMD_MAX_ELEM = 4,
+ ND_CMD_MAX_ENVELOPE = 16,
+ ND_CMD_ARS_QUERY_MAX = SZ_4K,
};

extern struct attribute_group nd_bus_attribute_group;
+extern struct attribute_group nd_dimm_attribute_group;

struct nd_dimm;
struct nd_bus_descriptor;
@@ -35,6 +43,13 @@ struct nd_bus_descriptor {
ndctl_fn ndctl;
};

+struct nd_cmd_desc {
+ int in_num;
+ int out_num;
+ u32 in_sizes[ND_CMD_MAX_ELEM];
+ int out_sizes[ND_CMD_MAX_ELEM];
+};
+
struct nd_bus;
struct nd_bus *nd_bus_register(struct device *parent,
struct nd_bus_descriptor *nfit_desc);
@@ -45,5 +60,13 @@ struct nd_bus_descriptor *to_nd_desc(struct nd_bus *nd_bus);
const char *nd_dimm_name(struct nd_dimm *nd_dimm);
void *nd_dimm_provider_data(struct nd_dimm *nd_dimm);
struct nd_dimm *nd_dimm_create(struct nd_bus *nd_bus, void *provider_data,
- const struct attribute_group **groups, unsigned long flags);
+ const struct attribute_group **groups, unsigned long flags,
+ unsigned long *dsm_mask);
+const struct nd_cmd_desc const *nd_cmd_dimm_desc(int cmd);
+const struct nd_cmd_desc const *nd_cmd_bus_desc(int cmd);
+u32 nd_cmd_in_size(struct nd_dimm *nd_dimm, int cmd,
+ const struct nd_cmd_desc *desc, int idx, void *buf);
+u32 nd_cmd_out_size(struct nd_dimm *nd_dimm, int cmd,
+ const struct nd_cmd_desc *desc, int idx, const u32 *in_field,
+ const u32 *out_field);
#endif /* __LIBND_H__ */
diff --git a/drivers/block/nd/nd-private.h b/drivers/block/nd/nd-private.h
index cfb5a7241ed1..968e5089f72c 100644
--- a/drivers/block/nd/nd-private.h
+++ b/drivers/block/nd/nd-private.h
@@ -18,6 +18,7 @@
extern struct list_head nd_bus_list;
extern struct mutex nd_bus_list_mutex;
extern struct bus_type nd_bus_type;
+extern int nd_dimm_major;

struct nd_bus {
struct nd_bus_descriptor *nd_desc;
@@ -29,10 +30,12 @@ struct nd_bus {
struct nd_dimm {
unsigned long flags;
void *provider_data;
+ unsigned long *dsm_mask;
struct device dev;
int id;
};

+bool is_nd_dimm(struct device *dev);
struct nd_bus *walk_to_nd_bus(struct device *nd_dev);
int __init nd_bus_init(void);
void __exit nd_bus_exit(void);
diff --git a/drivers/block/nd/test/nfit.c b/drivers/block/nd/test/nfit.c
index 1c79f32376fc..50916f0ca901 100644
--- a/drivers/block/nd/test/nfit.c
+++ b/drivers/block/nd/test/nfit.c
@@ -14,6 +14,7 @@
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
+#include <linux/ndctl.h>
#include <linux/sizes.h>
#include <linux/slab.h>
#include "nfit_test.h"
@@ -142,7 +143,74 @@ static int nfit_test_ctl(struct nd_bus_descriptor *nd_desc,
struct nd_dimm *nd_dimm, unsigned int cmd, void *buf,
unsigned int buf_len)
{
- return -ENOTTY;
+ struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
+ struct nfit_test *t = container_of(acpi_desc, typeof(*t), acpi_desc);
+ struct nfit_mem *nfit_mem = nd_dimm_provider_data(nd_dimm);
+ int i, rc;
+
+ if (!nfit_mem || !test_bit(cmd, &nfit_mem->dsm_mask))
+ return -ENXIO;
+
+ /* lookup label space for the given dimm */
+ for (i = 0; i < ARRAY_SIZE(handle); i++)
+ if (__to_nfit_memdev(nfit_mem)->nfit_handle == handle[i])
+ break;
+ if (i >= ARRAY_SIZE(handle))
+ return -ENXIO;
+
+ switch (cmd) {
+ case ND_CMD_GET_CONFIG_SIZE: {
+ struct nd_cmd_get_config_size *nd_cmd = buf;
+
+ if (buf_len < sizeof(*nd_cmd))
+ return -EINVAL;
+ nd_cmd->status = 0;
+ nd_cmd->config_size = LABEL_SIZE;
+ nd_cmd->max_xfer = SZ_4K;
+ rc = 0;
+ break;
+ }
+ case ND_CMD_GET_CONFIG_DATA: {
+ struct nd_cmd_get_config_data_hdr *nd_cmd = buf;
+ unsigned int len, offset = nd_cmd->in_offset;
+
+ if (buf_len < sizeof(*nd_cmd))
+ return -EINVAL;
+ if (offset >= LABEL_SIZE)
+ return -EINVAL;
+ if (nd_cmd->in_length + sizeof(*nd_cmd) > buf_len)
+ return -EINVAL;
+
+ nd_cmd->status = 0;
+ len = min(nd_cmd->in_length, LABEL_SIZE - offset);
+ memcpy(nd_cmd->out_buf, t->label[i] + offset, len);
+ rc = buf_len - sizeof(*nd_cmd) - len;
+ break;
+ }
+ case ND_CMD_SET_CONFIG_DATA: {
+ struct nd_cmd_set_config_hdr *nd_cmd = buf;
+ unsigned int len, offset = nd_cmd->in_offset;
+ u32 *status;
+
+ if (buf_len < sizeof(*nd_cmd))
+ return -EINVAL;
+ if (offset >= LABEL_SIZE)
+ return -EINVAL;
+ if (nd_cmd->in_length + sizeof(*nd_cmd) + 4 > buf_len)
+ return -EINVAL;
+
+ status = buf + nd_cmd->in_length + sizeof(*nd_cmd);
+ *status = 0;
+ len = min(nd_cmd->in_length, LABEL_SIZE - offset);
+ memcpy(t->label[i] + offset, nd_cmd->in_buf, len);
+ rc = buf_len - sizeof(*nd_cmd) - (len + 4);
+ break;
+ }
+ default:
+ return -ENOTTY;
+ }
+
+ return rc;
}

static DEFINE_SPINLOCK(nfit_test_lock);
@@ -280,6 +348,7 @@ static int nfit_test0_alloc(struct nfit_test *t)
t->label[i] = test_alloc(t, LABEL_SIZE, &t->label_dma[i]);
if (!t->label[i])
return -ENOMEM;
+ sprintf(t->label[i], "label%d", i);
}

for (i = 0; i < NUM_DCR; i++) {
@@ -322,6 +391,7 @@ static int nfit_test1_alloc(struct nfit_test *t)
static void nfit_test0_setup(struct nfit_test *t)
{
struct nd_bus_descriptor *nd_desc;
+ struct acpi_nfit_desc *acpi_desc;
struct acpi_nfit_memdev *memdev;
void *nfit_buf = t->nfit_buf;
size_t size = t->nfit_size;
@@ -763,7 +833,11 @@ static void nfit_test0_setup(struct nfit_test *t)

nfit->checksum = nfit_checksum(nfit_buf, size);

- nd_desc = &t->acpi_desc.nd_desc;
+ acpi_desc = &t->acpi_desc;
+ set_bit(ND_CMD_GET_CONFIG_SIZE, &acpi_desc->dimm_dsm_force_en);
+ set_bit(ND_CMD_GET_CONFIG_DATA, &acpi_desc->dimm_dsm_force_en);
+ set_bit(ND_CMD_SET_CONFIG_DATA, &acpi_desc->dimm_dsm_force_en);
+ nd_desc = &acpi_desc->nd_desc;
nd_desc->ndctl = nfit_test_ctl;
}

diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
index 68ceb97c458c..384e8d212b04 100644
--- a/include/uapi/linux/Kbuild
+++ b/include/uapi/linux/Kbuild
@@ -270,6 +270,7 @@ header-y += ncp_fs.h
header-y += ncp.h
header-y += ncp_mount.h
header-y += ncp_no.h
+header-y += ndctl.h
header-y += neighbour.h
header-y += netconf.h
header-y += netdevice.h
diff --git a/include/uapi/linux/ndctl.h b/include/uapi/linux/ndctl.h
new file mode 100644
index 000000000000..62c01bf76198
--- /dev/null
+++ b/include/uapi/linux/ndctl.h
@@ -0,0 +1,178 @@
+/*
+ * 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 Lesser General Public License,
+ * version 2.1, 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 Lesser General Public License for
+ * more details.
+ */
+#ifndef __NDCTL_H__
+#define __NDCTL_H__
+
+#include <linux/types.h>
+
+struct nd_cmd_smart {
+ __u32 status;
+ __u8 data[128];
+} __packed;
+
+struct nd_cmd_smart_threshold {
+ __u32 status;
+ __u8 data[8];
+} __packed;
+
+struct nd_cmd_dimm_flags {
+ __u32 status;
+ __u32 flags;
+} __packed;
+
+struct nd_cmd_get_config_size {
+ __u32 status;
+ __u32 config_size;
+ __u32 max_xfer;
+} __packed;
+
+struct nd_cmd_get_config_data_hdr {
+ __u32 in_offset;
+ __u32 in_length;
+ __u32 status;
+ __u8 out_buf[0];
+} __packed;
+
+struct nd_cmd_set_config_hdr {
+ __u32 in_offset;
+ __u32 in_length;
+ __u8 in_buf[0];
+} __packed;
+
+struct nd_cmd_vendor_hdr {
+ __u32 opcode;
+ __u32 in_length;
+ __u8 in_buf[0];
+} __packed;
+
+struct nd_cmd_vendor_tail {
+ __u32 status;
+ __u32 out_length;
+ __u8 out_buf[0];
+} __packed;
+
+struct nd_cmd_ars_cap {
+ __u64 address;
+ __u64 length;
+ __u32 status;
+ __u32 max_ars_out;
+} __packed;
+
+struct nd_cmd_ars_start {
+ __u64 address;
+ __u64 length;
+ __u16 type;
+ __u8 reserved[6];
+ __u32 status;
+} __packed;
+
+struct nd_cmd_ars_query {
+ __u32 status;
+ __u32 out_length;
+ __u64 address;
+ __u64 length;
+ __u16 type;
+ __u32 num_records;
+ struct nd_ars_record {
+ __u32 handle;
+ __u32 flags;
+ __u64 err_address;
+ __u64 mask;
+ } __packed records[0];
+} __packed;
+
+enum {
+ ND_CMD_IMPLEMENTED = 0,
+
+ /* bus commands */
+ ND_CMD_ARS_CAP = 1,
+ ND_CMD_ARS_START = 2,
+ ND_CMD_ARS_QUERY = 3,
+
+ /* per-dimm commands */
+ ND_CMD_SMART = 1,
+ ND_CMD_SMART_THRESHOLD = 2,
+ ND_CMD_DIMM_FLAGS = 3,
+ ND_CMD_GET_CONFIG_SIZE = 4,
+ ND_CMD_GET_CONFIG_DATA = 5,
+ ND_CMD_SET_CONFIG_DATA = 6,
+ ND_CMD_VENDOR_EFFECT_LOG_SIZE = 7,
+ ND_CMD_VENDOR_EFFECT_LOG = 8,
+ ND_CMD_VENDOR = 9,
+};
+
+static inline const char *nd_bus_cmd_name(unsigned cmd)
+{
+ static const char * const names[] = {
+ [ND_CMD_ARS_CAP] = "ars_cap",
+ [ND_CMD_ARS_START] = "ars_start",
+ [ND_CMD_ARS_QUERY] = "ars_query",
+ };
+
+ if (cmd < ARRAY_SIZE(names) && names[cmd])
+ return names[cmd];
+ return "unknown";
+}
+
+static inline const char *nd_dimm_cmd_name(unsigned cmd)
+{
+ static const char * const names[] = {
+ [ND_CMD_SMART] = "smart",
+ [ND_CMD_SMART_THRESHOLD] = "smart_thresh",
+ [ND_CMD_DIMM_FLAGS] = "flags",
+ [ND_CMD_GET_CONFIG_SIZE] = "get_size",
+ [ND_CMD_GET_CONFIG_DATA] = "get_data",
+ [ND_CMD_SET_CONFIG_DATA] = "set_data",
+ [ND_CMD_VENDOR_EFFECT_LOG_SIZE] = "effect_size",
+ [ND_CMD_VENDOR_EFFECT_LOG] = "effect_log",
+ [ND_CMD_VENDOR] = "vendor",
+ };
+
+ if (cmd < ARRAY_SIZE(names) && names[cmd])
+ return names[cmd];
+ return "unknown";
+}
+
+#define ND_IOCTL 'N'
+
+#define ND_IOCTL_SMART _IOWR(ND_IOCTL, ND_CMD_SMART,\
+ struct nd_cmd_smart)
+
+#define ND_IOCTL_SMART_THRESHOLD _IOWR(ND_IOCTL, ND_CMD_SMART_THRESHOLD,\
+ struct nd_cmd_smart_threshold)
+
+#define ND_IOCTL_DIMM_FLAGS _IOWR(ND_IOCTL, ND_CMD_DIMM_FLAGS,\
+ struct nd_cmd_dimm_flags)
+
+#define ND_IOCTL_GET_CONFIG_SIZE _IOWR(ND_IOCTL, ND_CMD_GET_CONFIG_SIZE,\
+ struct nd_cmd_get_config_size)
+
+#define ND_IOCTL_GET_CONFIG_DATA _IOWR(ND_IOCTL, ND_CMD_GET_CONFIG_DATA,\
+ struct nd_cmd_get_config_data_hdr)
+
+#define ND_IOCTL_SET_CONFIG_DATA _IOWR(ND_IOCTL, ND_CMD_SET_CONFIG_DATA,\
+ struct nd_cmd_set_config_hdr)
+
+#define ND_IOCTL_VENDOR _IOWR(ND_IOCTL, ND_CMD_VENDOR,\
+ struct nd_cmd_vendor_hdr)
+
+#define ND_IOCTL_ARS_CAP _IOWR(ND_IOCTL, ND_CMD_ARS_CAP,\
+ struct nd_cmd_ars_cap)
+
+#define ND_IOCTL_ARS_START _IOWR(ND_IOCTL, ND_CMD_ARS_START,\
+ struct nd_cmd_ars_start)
+
+#define ND_IOCTL_ARS_QUERY _IOWR(ND_IOCTL, ND_CMD_ARS_QUERY,\
+ struct nd_cmd_ars_query)
+
+#endif /* __NDCTL_H__ */

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