redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

libnvdimm for v5.1 

* Fix nfit-bus command submission regression
 
 * Support retrieval of short-ARS results if the ARS state is "requires
   continuation", and even if the "no_init_ars" module parameter is
   specified.
 
 * Allow busy-polling of the kernel ARS state by allowing root to reset
   the exponential back-off timer.
 
 * Filter potentially stale ARS results by tracking query-ARS relative to
   the previous start-ARS.
 
 * Enhance dax_device alignment checks
 
 * Add support for the Hyper-V family of device-specific-methods (DSMs)
 
 * Add several fixes and workarounds for Hyper-V compatibility.
 
 * Fix support to cache the dirty-shutdown-count at init.
 -----BEGIN PGP SIGNATURE-----
 
 iQIcBAABAgAGBQJchsnlAAoJEB7SkWpmfYgCzNcP+gIsRwy2nklV78CoIX9rMOF+
 8AF/o3kb+XbAGziTkFRk5SXsAGLQl1PNTzfaJDiBfS0vX6c3ja4cDhX4wgLi/w1c
 2opBA3Fd1qAk2XXkOtQQ+yqFFxXR3zFV+Iflue39XJhwgR0yoY10mKEIGkelMur5
 kOZjfWA6qseVGlyujHoM4Ta19Le88S3Yx1Da2jYTxHOYYnpRqq/epuO3hqojL/CT
 GIrJFD6ayyuGjeA4CD3LsDAGgISQbLSRg1DXbCebmIsuoQ9TZeD7egqxjWKutcSU
 xQVbI7Dw/dUKnAdo4DO9x0kMKV7XWDfpPOk4eZc3TSY/2g7muatsc3ZhY347F4Ia
 3R9ox23WS1hd41jGbYT1CeKPvTnqnIZ6zwCEIRTq+exXSEp+lzOdF3De6olMcgYR
 b37aKCR3PNZwF+esQ1XLA7tHLbLfdjY/TcFQET9i4vUMOlC/NeVpJY6g4kgd/1Lu
 MNHu5NxTGtuK6Hp8zJESQ4X+yhhIMPd5VwOeDOjTzuLwgMA2c4MtXeZTABfuBe1W
 bN6Kthv8mk5+CnEvXZDAEdSRijTo8inTmYQuIyaLSkWFhvANHKZX4xTc9VVhTW2I
 8IONqBD3ZtFW+z+qTRB3VbOp7qj3/gA7F+T5C+MV8gj/YAO6hCzGYq8kUtQ4FeuO
 OZwXxuFYY+iOOF1XEM3f
 =wt4z
 -----END PGP SIGNATURE-----

Merge tag 'libnvdimm-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm updates from Dan Williams:
 "The bulk of this has been in -next since before the merge window
  opened, with no known collisions / issues reported.

  The only detail worth noting, outside the summary below, is that the
  "libnvdimm-start-pad" topic has been truncated to just cleanups and
  small fixes. The full topic branch would have doubled down on hacks
  around the "section alignment" limitation of the core-mm, instead
  effort is now being spent to address that root issue in the memory
  hotplug implementation for v5.2.

   - Fix nfit-bus command submission regression

   - Support retrieval of short-ARS results if the ARS state is
     "requires continuation", and even if the "no_init_ars" module
     parameter is specified

   - Allow busy-polling of the kernel ARS state by allowing root to
     reset the exponential back-off timer

   - Filter potentially stale ARS results by tracking query-ARS relative
     to the previous start-ARS

   - Enhance dax_device alignment checks

   - Add support for the Hyper-V family of device-specific-methods
     (DSMs)

   - Add several fixes and workarounds for Hyper-V compatibility

   - Fix support to cache the dirty-shutdown-count at init"

* tag 'libnvdimm-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (25 commits)
  libnvdimm/namespace: Clean up holder_class_store()
  libnvdimm/of_pmem: Fix platform_no_drv_owner.cocci warnings
  acpi/nfit: Update NFIT flags error message
  libnvdimm/btt: Fix LBA masking during 'free list' population
  libnvdimm/btt: Remove unnecessary code in btt_freelist_init
  libnvdimm/pfn: Remove dax_label_reserve
  dax: Check the end of the block-device capacity with dax_direct_access()
  nfit/ars: Avoid stale ARS results
  nfit/ars: Allow root to busy-poll the ARS state machine
  nfit/ars: Introduce scrub_flags
  nfit/ars: Remove ars_start_flags
  nfit/ars: Attempt short-ARS even in the no_init_ars case
  nfit/ars: Attempt a short-ARS whenever the ARS state is idle at boot
  acpi/nfit: Require opt-in for read-only label configurations
  libnvdimm/pmem: Honor force_raw for legacy pmem regions
  libnvdimm/pfn: Account for PAGE_SIZE > info-block-size in nd_pfn_init()
  libnvdimm: Fix altmap reservation size calculation
  libnvdimm, pfn: Fix over-trim in trim_pfn_device()
  acpi/nfit: Fix bus command validation
  libnvdimm/dimm: Add a no-BLK quirk based on NVDIMM family
  ...
hifive-unleashed-5.1
Linus Torvalds 2019-03-13 09:41:18 -07:00
parent 3bb0f28d84 4083014e32
commit 5ea6718b1f
15 changed files with 274 additions and 114 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
MAINTAINERS
View File

@ -4643,10 +4643,11 @@ S: Maintained
F: drivers/i2c/busses/i2c-diolan-u2c.c
FILESYSTEM DIRECT ACCESS (DAX)
M: Matthew Wilcox <willy@infradead.org>
M: Ross Zwisler <zwisler@kernel.org>
M: Jan Kara <jack@suse.cz>
M: Dan Williams <dan.j.williams@intel.com>
R: Matthew Wilcox <willy@infradead.org>
R: Jan Kara <jack@suse.cz>
L: linux-fsdevel@vger.kernel.org
L: linux-nvdimm@lists.01.org
S: Supported
F: fs/dax.c
F: include/linux/dax.h
@ -4654,9 +4655,9 @@ F: include/trace/events/fs_dax.h
DEVICE DIRECT ACCESS (DAX)
M: Dan Williams <dan.j.williams@intel.com>
M: Dave Jiang <dave.jiang@intel.com>
M: Ross Zwisler <zwisler@kernel.org>
M: Vishal Verma <vishal.l.verma@intel.com>
M: Keith Busch <keith.busch@intel.com>
M: Dave Jiang <dave.jiang@intel.com>
L: linux-nvdimm@lists.01.org
S: Supported
F: drivers/dax/
@ -8812,7 +8813,6 @@ S: Maintained
F: tools/lib/lockdep/
LIBNVDIMM BLK: MMIO-APERTURE DRIVER
M: Ross Zwisler <zwisler@kernel.org>
M: Dan Williams <dan.j.williams@intel.com>
M: Vishal Verma <vishal.l.verma@intel.com>
M: Dave Jiang <dave.jiang@intel.com>
@ -8825,7 +8825,6 @@ F: drivers/nvdimm/region_devs.c
LIBNVDIMM BTT: BLOCK TRANSLATION TABLE
M: Vishal Verma <vishal.l.verma@intel.com>
M: Dan Williams <dan.j.williams@intel.com>
M: Ross Zwisler <zwisler@kernel.org>
M: Dave Jiang <dave.jiang@intel.com>
L: linux-nvdimm@lists.01.org
Q: https://patchwork.kernel.org/project/linux-nvdimm/list/
@ -8833,7 +8832,6 @@ S: Supported
F: drivers/nvdimm/btt*
LIBNVDIMM PMEM: PERSISTENT MEMORY DRIVER
M: Ross Zwisler <zwisler@kernel.org>
M: Dan Williams <dan.j.williams@intel.com>
M: Vishal Verma <vishal.l.verma@intel.com>
M: Dave Jiang <dave.jiang@intel.com>
@ -8852,9 +8850,10 @@ F: Documentation/devicetree/bindings/pmem/pmem-region.txt
LIBNVDIMM: NON-VOLATILE MEMORY DEVICE SUBSYSTEM
M: Dan Williams <dan.j.williams@intel.com>
M: Ross Zwisler <zwisler@kernel.org>
M: Vishal Verma <vishal.l.verma@intel.com>
M: Dave Jiang <dave.jiang@intel.com>
M: Keith Busch <keith.busch@intel.com>
M: Ira Weiny <ira.weiny@intel.com>
L: linux-nvdimm@lists.01.org
Q: https://patchwork.kernel.org/project/linux-nvdimm/list/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm.git

187
drivers/acpi/nfit/core.c
View File

@ -55,6 +55,10 @@ static bool no_init_ars;
module_param(no_init_ars, bool, 0644);
MODULE_PARM_DESC(no_init_ars, "Skip ARS run at nfit init time");
static bool force_labels;
module_param(force_labels, bool, 0444);
MODULE_PARM_DESC(force_labels, "Opt-in to labels despite missing methods");
LIST_HEAD(acpi_descs);
DEFINE_MUTEX(acpi_desc_lock);
@ -415,7 +419,7 @@ static int cmd_to_func(struct nfit_mem *nfit_mem, unsigned int cmd,
if (call_pkg) {
int i;
if (nfit_mem->family != call_pkg->nd_family)
if (nfit_mem && nfit_mem->family != call_pkg->nd_family)
return -ENOTTY;
for (i = 0; i < ARRAY_SIZE(call_pkg->nd_reserved2); i++)
@ -424,6 +428,10 @@ static int cmd_to_func(struct nfit_mem *nfit_mem, unsigned int cmd,
return call_pkg->nd_command;
}
/* In the !call_pkg case, bus commands == bus functions */
if (!nfit_mem)
return cmd;
/* Linux ND commands == NVDIMM_FAMILY_INTEL function numbers */
if (nfit_mem->family == NVDIMM_FAMILY_INTEL)
return cmd;
@ -454,17 +462,18 @@ int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
if (cmd_rc)
*cmd_rc = -EINVAL;
if (cmd == ND_CMD_CALL)
call_pkg = buf;
func = cmd_to_func(nfit_mem, cmd, call_pkg);
if (func < 0)
return func;
if (nvdimm) {
struct acpi_device *adev = nfit_mem->adev;
if (!adev)
return -ENOTTY;
if (cmd == ND_CMD_CALL)
call_pkg = buf;
func = cmd_to_func(nfit_mem, cmd, call_pkg);
if (func < 0)
return func;
dimm_name = nvdimm_name(nvdimm);
cmd_name = nvdimm_cmd_name(cmd);
cmd_mask = nvdimm_cmd_mask(nvdimm);
@ -475,12 +484,9 @@ int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
} else {
struct acpi_device *adev = to_acpi_dev(acpi_desc);
func = cmd;
cmd_name = nvdimm_bus_cmd_name(cmd);
cmd_mask = nd_desc->cmd_mask;
dsm_mask = cmd_mask;
if (cmd == ND_CMD_CALL)
dsm_mask = nd_desc->bus_dsm_mask;
dsm_mask = nd_desc->bus_dsm_mask;
desc = nd_cmd_bus_desc(cmd);
guid = to_nfit_uuid(NFIT_DEV_BUS);
handle = adev->handle;
@ -554,6 +560,13 @@ int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
return -EINVAL;
}
if (out_obj->type != ACPI_TYPE_BUFFER) {
dev_dbg(dev, "%s unexpected output object type cmd: %s type: %d\n",
dimm_name, cmd_name, out_obj->type);
rc = -EINVAL;
goto out;
}
if (call_pkg) {
call_pkg->nd_fw_size = out_obj->buffer.length;
memcpy(call_pkg->nd_payload + call_pkg->nd_size_in,
@ -572,13 +585,6 @@ int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
return 0;
}
if (out_obj->package.type != ACPI_TYPE_BUFFER) {
dev_dbg(dev, "%s unexpected output object type cmd: %s type: %d\n",
dimm_name, cmd_name, out_obj->type);
rc = -EINVAL;
goto out;
}
dev_dbg(dev, "%s cmd: %s output length: %d\n", dimm_name,
cmd_name, out_obj->buffer.length);
print_hex_dump_debug(cmd_name, DUMP_PREFIX_OFFSET, 4, 4,
@ -1317,19 +1323,30 @@ static ssize_t scrub_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct nvdimm_bus_descriptor *nd_desc;
struct acpi_nfit_desc *acpi_desc;
ssize_t rc = -ENXIO;
bool busy;
device_lock(dev);
nd_desc = dev_get_drvdata(dev);
if (nd_desc) {
struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
mutex_lock(&acpi_desc->init_mutex);
rc = sprintf(buf, "%d%s", acpi_desc->scrub_count,
acpi_desc->scrub_busy
&& !acpi_desc->cancel ? "+\n" : "\n");
mutex_unlock(&acpi_desc->init_mutex);
if (!nd_desc) {
device_unlock(dev);
return rc;
}
acpi_desc = to_acpi_desc(nd_desc);
mutex_lock(&acpi_desc->init_mutex);
busy = test_bit(ARS_BUSY, &acpi_desc->scrub_flags)
&& !test_bit(ARS_CANCEL, &acpi_desc->scrub_flags);
rc = sprintf(buf, "%d%s", acpi_desc->scrub_count, busy ? "+\n" : "\n");
/* Allow an admin to poll the busy state at a higher rate */
if (busy && capable(CAP_SYS_RAWIO) && !test_and_set_bit(ARS_POLL,
&acpi_desc->scrub_flags)) {
acpi_desc->scrub_tmo = 1;
mod_delayed_work(nfit_wq, &acpi_desc->dwork, HZ);
}
mutex_unlock(&acpi_desc->init_mutex);
device_unlock(dev);
return rc;
}
@ -1759,14 +1776,14 @@ static bool acpi_nvdimm_has_method(struct acpi_device *adev, char *method)
__weak void nfit_intel_shutdown_status(struct nfit_mem *nfit_mem)
{
struct device *dev = &nfit_mem->adev->dev;
struct nd_intel_smart smart = { 0 };
union acpi_object in_buf = {
.type = ACPI_TYPE_BUFFER,
.buffer.pointer = (char *) &smart,
.buffer.length = sizeof(smart),
.buffer.type = ACPI_TYPE_BUFFER,
.buffer.length = 0,
};
union acpi_object in_obj = {
.type = ACPI_TYPE_PACKAGE,
.package.type = ACPI_TYPE_PACKAGE,
.package.count = 1,
.package.elements = &in_buf,
};
@ -1781,8 +1798,15 @@ __weak void nfit_intel_shutdown_status(struct nfit_mem *nfit_mem)
return;
out_obj = acpi_evaluate_dsm(handle, guid, revid, func, &in_obj);
if (!out_obj)
if (!out_obj || out_obj->type != ACPI_TYPE_BUFFER
|| out_obj->buffer.length < sizeof(smart)) {
dev_dbg(dev->parent, "%s: failed to retrieve initial health\n",
dev_name(dev));
ACPI_FREE(out_obj);
return;
}
memcpy(&smart, out_obj->buffer.pointer, sizeof(smart));
ACPI_FREE(out_obj);
if (smart.flags & ND_INTEL_SMART_SHUTDOWN_VALID) {
if (smart.shutdown_state)
@ -1793,7 +1817,6 @@ __weak void nfit_intel_shutdown_status(struct nfit_mem *nfit_mem)
set_bit(NFIT_MEM_DIRTY_COUNT, &nfit_mem->flags);
nfit_mem->dirty_shutdown = smart.shutdown_count;
}
ACPI_FREE(out_obj);
}
static void populate_shutdown_status(struct nfit_mem *nfit_mem)
@ -1861,9 +1884,17 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc,
dev_set_drvdata(&adev_dimm->dev, nfit_mem);
/*
* Until standardization materializes we need to consider 4
* different command sets. Note, that checking for function0 (bit0)
* tells us if any commands are reachable through this GUID.
* There are 4 "legacy" NVDIMM command sets
* (NVDIMM_FAMILY_{INTEL,MSFT,HPE1,HPE2}) that were created before
* an EFI working group was established to constrain this
* proliferation. The nfit driver probes for the supported command
* set by GUID. Note, if you're a platform developer looking to add
* a new command set to this probe, consider using an existing set,
* or otherwise seek approval to publish the command set at
* http://www.uefi.org/RFIC_LIST.
*
* Note, that checking for function0 (bit0) tells us if any commands
* are reachable through this GUID.
*/
for (i = 0; i <= NVDIMM_FAMILY_MAX; i++)
if (acpi_check_dsm(adev_dimm->handle, to_nfit_uuid(i), 1, 1))
@ -1886,6 +1917,8 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc,
dsm_mask &= ~(1 << 8);
} else if (nfit_mem->family == NVDIMM_FAMILY_MSFT) {
dsm_mask = 0xffffffff;
} else if (nfit_mem->family == NVDIMM_FAMILY_HYPERV) {
dsm_mask = 0x1f;
} else {
dev_dbg(dev, "unknown dimm command family\n");
nfit_mem->family = -1;
@ -1915,18 +1948,32 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc,
| 1 << ND_CMD_SET_CONFIG_DATA;
if (family == NVDIMM_FAMILY_INTEL
&& (dsm_mask & label_mask) == label_mask)
return 0;
/* skip _LS{I,R,W} enabling */;
else {
if (acpi_nvdimm_has_method(adev_dimm, "_LSI")
&& acpi_nvdimm_has_method(adev_dimm, "_LSR")) {
dev_dbg(dev, "%s: has _LSR\n", dev_name(&adev_dimm->dev));
set_bit(NFIT_MEM_LSR, &nfit_mem->flags);
}
if (acpi_nvdimm_has_method(adev_dimm, "_LSI")
&& acpi_nvdimm_has_method(adev_dimm, "_LSR")) {
dev_dbg(dev, "%s: has _LSR\n", dev_name(&adev_dimm->dev));
set_bit(NFIT_MEM_LSR, &nfit_mem->flags);
}
if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags)
&& acpi_nvdimm_has_method(adev_dimm, "_LSW")) {
dev_dbg(dev, "%s: has _LSW\n", dev_name(&adev_dimm->dev));
set_bit(NFIT_MEM_LSW, &nfit_mem->flags);
}
if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags)
&& acpi_nvdimm_has_method(adev_dimm, "_LSW")) {
dev_dbg(dev, "%s: has _LSW\n", dev_name(&adev_dimm->dev));
set_bit(NFIT_MEM_LSW, &nfit_mem->flags);
/*
* Quirk read-only label configurations to preserve
* access to label-less namespaces by default.
*/
if (!test_bit(NFIT_MEM_LSW, &nfit_mem->flags)
&& !force_labels) {
dev_dbg(dev, "%s: No _LSW, disable labels\n",
dev_name(&adev_dimm->dev));
clear_bit(NFIT_MEM_LSR, &nfit_mem->flags);
} else
dev_dbg(dev, "%s: Force enable labels\n",
dev_name(&adev_dimm->dev));
}
populate_shutdown_status(nfit_mem);
@ -2027,6 +2074,10 @@ static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
cmd_mask |= nfit_mem->dsm_mask & NVDIMM_STANDARD_CMDMASK;
}
/* Quirk to ignore LOCAL for labels on HYPERV DIMMs */
if (nfit_mem->family == NVDIMM_FAMILY_HYPERV)
set_bit(NDD_NOBLK, &flags);
if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags)) {
set_bit(ND_CMD_GET_CONFIG_SIZE, &cmd_mask);
set_bit(ND_CMD_GET_CONFIG_DATA, &cmd_mask);
@ -2050,7 +2101,7 @@ static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
if ((mem_flags & ACPI_NFIT_MEM_FAILED_MASK) == 0)
continue;
dev_info(acpi_desc->dev, "%s flags:%s%s%s%s%s\n",
dev_err(acpi_desc->dev, "Error found in NVDIMM %s flags:%s%s%s%s%s\n",
nvdimm_name(nvdimm),
mem_flags & ACPI_NFIT_MEM_SAVE_FAILED ? " save_fail" : "",
mem_flags & ACPI_NFIT_MEM_RESTORE_FAILED ? " restore_fail":"",
@ -2641,7 +2692,10 @@ static int ars_start(struct acpi_nfit_desc *acpi_desc,
if (rc < 0)
return rc;
return cmd_rc;
if (cmd_rc < 0)
return cmd_rc;
set_bit(ARS_VALID, &acpi_desc->scrub_flags);
return 0;
}
static int ars_continue(struct acpi_nfit_desc *acpi_desc)
@ -2651,11 +2705,11 @@ static int ars_continue(struct acpi_nfit_desc *acpi_desc)
struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
struct nd_cmd_ars_status *ars_status = acpi_desc->ars_status;
memset(&ars_start, 0, sizeof(ars_start));
ars_start.address = ars_status->restart_address;
ars_start.length = ars_status->restart_length;
ars_start.type = ars_status->type;
ars_start.flags = acpi_desc->ars_start_flags;
ars_start = (struct nd_cmd_ars_start) {
.address = ars_status->restart_address,
.length = ars_status->restart_length,
.type = ars_status->type,
};
rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_START, &ars_start,
sizeof(ars_start), &cmd_rc);
if (rc < 0)
@ -2734,6 +2788,17 @@ static int ars_status_process_records(struct acpi_nfit_desc *acpi_desc)
*/
if (ars_status->out_length < 44)
return 0;
/*
* Ignore potentially stale results that are only refreshed
* after a start-ARS event.
*/
if (!test_and_clear_bit(ARS_VALID, &acpi_desc->scrub_flags)) {
dev_dbg(acpi_desc->dev, "skip %d stale records\n",
ars_status->num_records);
return 0;
}
for (i = 0; i < ars_status->num_records; i++) {
/* only process full records */
if (ars_status->out_length
@ -3004,14 +3069,16 @@ static int ars_register(struct acpi_nfit_desc *acpi_desc,
{
int rc;
if (no_init_ars || test_bit(ARS_FAILED, &nfit_spa->ars_state))
if (test_bit(ARS_FAILED, &nfit_spa->ars_state))
return acpi_nfit_register_region(acpi_desc, nfit_spa);
set_bit(ARS_REQ_SHORT, &nfit_spa->ars_state);
set_bit(ARS_REQ_LONG, &nfit_spa->ars_state);
if (!no_init_ars)
set_bit(ARS_REQ_LONG, &nfit_spa->ars_state);
switch (acpi_nfit_query_poison(acpi_desc)) {
case 0:
case -ENOSPC:
case -EAGAIN:
rc = ars_start(acpi_desc, nfit_spa, ARS_REQ_SHORT);
/* shouldn't happen, try again later */
@ -3036,7 +3103,6 @@ static int ars_register(struct acpi_nfit_desc *acpi_desc,
break;
case -EBUSY:
case -ENOMEM:
case -ENOSPC:
/*
* BIOS was using ARS, wait for it to complete (or
* resources to become available) and then perform our
@ -3071,7 +3137,7 @@ static unsigned int __acpi_nfit_scrub(struct acpi_nfit_desc *acpi_desc,
lockdep_assert_held(&acpi_desc->init_mutex);
if (acpi_desc->cancel)
if (test_bit(ARS_CANCEL, &acpi_desc->scrub_flags))
return 0;
if (query_rc == -EBUSY) {
@ -3145,7 +3211,7 @@ static void __sched_ars(struct acpi_nfit_desc *acpi_desc, unsigned int tmo)
{
lockdep_assert_held(&acpi_desc->init_mutex);
acpi_desc->scrub_busy = 1;
set_bit(ARS_BUSY, &acpi_desc->scrub_flags);
/* note this should only be set from within the workqueue */
if (tmo)
acpi_desc->scrub_tmo = tmo;
@ -3161,7 +3227,7 @@ static void notify_ars_done(struct acpi_nfit_desc *acpi_desc)
{
lockdep_assert_held(&acpi_desc->init_mutex);
acpi_desc->scrub_busy = 0;
clear_bit(ARS_BUSY, &acpi_desc->scrub_flags);
acpi_desc->scrub_count++;
if (acpi_desc->scrub_count_state)
sysfs_notify_dirent(acpi_desc->scrub_count_state);
@ -3182,6 +3248,7 @@ static void acpi_nfit_scrub(struct work_struct *work)
else
notify_ars_done(acpi_desc);
memset(acpi_desc->ars_status, 0, acpi_desc->max_ars);
clear_bit(ARS_POLL, &acpi_desc->scrub_flags);
mutex_unlock(&acpi_desc->init_mutex);
}
@ -3216,6 +3283,7 @@ static int acpi_nfit_register_regions(struct acpi_nfit_desc *acpi_desc)
struct nfit_spa *nfit_spa;
int rc;
set_bit(ARS_VALID, &acpi_desc->scrub_flags);
list_for_each_entry(nfit_spa, &acpi_desc->spas, list) {
switch (nfit_spa_type(nfit_spa->spa)) {
case NFIT_SPA_VOLATILE:
@ -3450,7 +3518,7 @@ int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc,
struct nfit_spa *nfit_spa;
mutex_lock(&acpi_desc->init_mutex);
if (acpi_desc->cancel) {
if (test_bit(ARS_CANCEL, &acpi_desc->scrub_flags)) {
mutex_unlock(&acpi_desc->init_mutex);
return 0;
}
@ -3529,7 +3597,7 @@ void acpi_nfit_shutdown(void *data)
mutex_unlock(&acpi_desc_lock);
mutex_lock(&acpi_desc->init_mutex);
acpi_desc->cancel = 1;
set_bit(ARS_CANCEL, &acpi_desc->scrub_flags);
cancel_delayed_work_sync(&acpi_desc->dwork);
mutex_unlock(&acpi_desc->init_mutex);
@ -3729,6 +3797,7 @@ static __init int nfit_init(void)
guid_parse(UUID_NFIT_DIMM_N_HPE1, &nfit_uuid[NFIT_DEV_DIMM_N_HPE1]);
guid_parse(UUID_NFIT_DIMM_N_HPE2, &nfit_uuid[NFIT_DEV_DIMM_N_HPE2]);
guid_parse(UUID_NFIT_DIMM_N_MSFT, &nfit_uuid[NFIT_DEV_DIMM_N_MSFT]);
guid_parse(UUID_NFIT_DIMM_N_HYPERV, &nfit_uuid[NFIT_DEV_DIMM_N_HYPERV]);
nfit_wq = create_singlethread_workqueue("nfit");
if (!nfit_wq)

17
drivers/acpi/nfit/nfit.h
View File

@ -34,11 +34,14 @@
/* https://msdn.microsoft.com/library/windows/hardware/mt604741 */
#define UUID_NFIT_DIMM_N_MSFT "1ee68b36-d4bd-4a1a-9a16-4f8e53d46e05"
/* http://www.uefi.org/RFIC_LIST (see "Virtual NVDIMM 0x1901") */
#define UUID_NFIT_DIMM_N_HYPERV "5746c5f2-a9a2-4264-ad0e-e4ddc9e09e80"
#define ACPI_NFIT_MEM_FAILED_MASK (ACPI_NFIT_MEM_SAVE_FAILED \
| ACPI_NFIT_MEM_RESTORE_FAILED | ACPI_NFIT_MEM_FLUSH_FAILED \
| ACPI_NFIT_MEM_NOT_ARMED | ACPI_NFIT_MEM_MAP_FAILED)
#define NVDIMM_FAMILY_MAX NVDIMM_FAMILY_MSFT
#define NVDIMM_FAMILY_MAX NVDIMM_FAMILY_HYPERV
#define NVDIMM_STANDARD_CMDMASK \
(1 << ND_CMD_SMART | 1 << ND_CMD_SMART_THRESHOLD | 1 << ND_CMD_DIMM_FLAGS \
@ -94,6 +97,7 @@ enum nfit_uuids {
NFIT_DEV_DIMM_N_HPE1 = NVDIMM_FAMILY_HPE1,
NFIT_DEV_DIMM_N_HPE2 = NVDIMM_FAMILY_HPE2,
NFIT_DEV_DIMM_N_MSFT = NVDIMM_FAMILY_MSFT,
NFIT_DEV_DIMM_N_HYPERV = NVDIMM_FAMILY_HYPERV,
NFIT_SPA_VOLATILE,
NFIT_SPA_PM,
NFIT_SPA_DCR,
@ -210,6 +214,13 @@ struct nfit_mem {
int family;
};
enum scrub_flags {
ARS_BUSY,
ARS_CANCEL,
ARS_VALID,
ARS_POLL,
};
struct acpi_nfit_desc {
struct nvdimm_bus_descriptor nd_desc;
struct acpi_table_header acpi_header;
@ -223,7 +234,6 @@ struct acpi_nfit_desc {
struct list_head idts;
struct nvdimm_bus *nvdimm_bus;
struct device *dev;
u8 ars_start_flags;
struct nd_cmd_ars_status *ars_status;
struct nfit_spa *scrub_spa;
struct delayed_work dwork;
@ -232,8 +242,7 @@ struct acpi_nfit_desc {
unsigned int max_ars;
unsigned int scrub_count;
unsigned int scrub_mode;
unsigned int scrub_busy:1;
unsigned int cancel:1;
unsigned long scrub_flags;
unsigned long dimm_cmd_force_en;
unsigned long bus_cmd_force_en;
unsigned long bus_nfit_cmd_force_en;

38
drivers/dax/super.c
View File

@ -86,12 +86,14 @@ bool __bdev_dax_supported(struct block_device *bdev, int blocksize)
{
struct dax_device *dax_dev;
bool dax_enabled = false;
pgoff_t pgoff, pgoff_end;
struct request_queue *q;
pgoff_t pgoff;
int err, id;
pfn_t pfn;
long len;
char buf[BDEVNAME_SIZE];
void *kaddr, *end_kaddr;
pfn_t pfn, end_pfn;
sector_t last_page;
long len, len2;
int err, id;
if (blocksize != PAGE_SIZE) {
pr_debug("%s: error: unsupported blocksize for dax\n",
@ -113,6 +115,14 @@ bool __bdev_dax_supported(struct block_device *bdev, int blocksize)
return false;
}
last_page = PFN_DOWN(i_size_read(bdev->bd_inode) - 1) * 8;
err = bdev_dax_pgoff(bdev, last_page, PAGE_SIZE, &pgoff_end);
if (err) {
pr_debug("%s: error: unaligned partition for dax\n",
bdevname(bdev, buf));
return false;
}
dax_dev = dax_get_by_host(bdev->bd_disk->disk_name);
if (!dax_dev) {
pr_debug("%s: error: device does not support dax\n",
@ -121,14 +131,15 @@ bool __bdev_dax_supported(struct block_device *bdev, int blocksize)
}
id = dax_read_lock();
len = dax_direct_access(dax_dev, pgoff, 1, NULL, &pfn);
len = dax_direct_access(dax_dev, pgoff, 1, &kaddr, &pfn);
len2 = dax_direct_access(dax_dev, pgoff_end, 1, &end_kaddr, &end_pfn);
dax_read_unlock(id);
put_dax(dax_dev);
if (len < 1) {
if (len < 1 || len2 < 1) {
pr_debug("%s: error: dax access failed (%ld)\n",
bdevname(bdev, buf), len);
bdevname(bdev, buf), len < 1 ? len : len2);
return false;
}
@ -143,13 +154,20 @@ bool __bdev_dax_supported(struct block_device *bdev, int blocksize)
*/
WARN_ON(IS_ENABLED(CONFIG_ARCH_HAS_PMEM_API));
dax_enabled = true;
} else if (pfn_t_devmap(pfn)) {
struct dev_pagemap *pgmap;
} else if (pfn_t_devmap(pfn) && pfn_t_devmap(end_pfn)) {
struct dev_pagemap *pgmap, *end_pgmap;
pgmap = get_dev_pagemap(pfn_t_to_pfn(pfn), NULL);
if (pgmap && pgmap->type == MEMORY_DEVICE_FS_DAX)
end_pgmap = get_dev_pagemap(pfn_t_to_pfn(end_pfn), NULL);
if (pgmap && pgmap == end_pgmap && pgmap->type == MEMORY_DEVICE_FS_DAX
&& pfn_t_to_page(pfn)->pgmap == pgmap
&& pfn_t_to_page(end_pfn)->pgmap == pgmap
&& pfn_t_to_pfn(pfn) == PHYS_PFN(__pa(kaddr))
&& pfn_t_to_pfn(end_pfn) == PHYS_PFN(__pa(end_kaddr)))
dax_enabled = true;
put_dev_pagemap(pgmap);
put_dev_pagemap(end_pgmap);
}
if (!dax_enabled) {

33
drivers/nvdimm/btt.c
View File

@ -541,9 +541,9 @@ static int arena_clear_freelist_error(struct arena_info *arena, u32 lane)
static int btt_freelist_init(struct arena_info *arena)
{
int old, new, ret;
u32 i, map_entry;
struct log_entry log_new, log_old;
int new, ret;
struct log_entry log_new;
u32 i, map_entry, log_oldmap, log_newmap;
arena->freelist = kcalloc(arena->nfree, sizeof(struct free_entry),
GFP_KERNEL);
@ -551,24 +551,26 @@ static int btt_freelist_init(struct arena_info *arena)
return -ENOMEM;
for (i = 0; i < arena->nfree; i++) {
old = btt_log_read(arena, i, &log_old, LOG_OLD_ENT);
if (old < 0)
return old;
new = btt_log_read(arena, i, &log_new, LOG_NEW_ENT);
if (new < 0)
return new;
/* old and new map entries with any flags stripped out */
log_oldmap = ent_lba(le32_to_cpu(log_new.old_map));
log_newmap = ent_lba(le32_to_cpu(log_new.new_map));
/* sub points to the next one to be overwritten */
arena->freelist[i].sub = 1 - new;
arena->freelist[i].seq = nd_inc_seq(le32_to_cpu(log_new.seq));
arena->freelist[i].block = le32_to_cpu(log_new.old_map);
arena->freelist[i].block = log_oldmap;
/*
* FIXME: if error clearing fails during init, we want to make
* the BTT read-only
*/
if (ent_e_flag(log_new.old_map)) {
if (ent_e_flag(log_new.old_map) &&
!ent_normal(log_new.old_map)) {
arena->freelist[i].has_err = 1;
ret = arena_clear_freelist_error(arena, i);
if (ret)
dev_err_ratelimited(to_dev(arena),
@ -576,7 +578,7 @@ static int btt_freelist_init(struct arena_info *arena)
}
/* This implies a newly created or untouched flog entry */
if (log_new.old_map == log_new.new_map)
if (log_oldmap == log_newmap)
continue;
/* Check if map recovery is needed */
@ -584,8 +586,15 @@ static int btt_freelist_init(struct arena_info *arena)
NULL, NULL, 0);
if (ret)
return ret;
if ((le32_to_cpu(log_new.new_map) != map_entry) &&
(le32_to_cpu(log_new.old_map) == map_entry)) {
/*
* The map_entry from btt_read_map is stripped of any flag bits,
* so use the stripped out versions from the log as well for
* testing whether recovery is needed. For restoration, use the
* 'raw' version of the log entries as that captured what we
* were going to write originally.
*/
if ((log_newmap != map_entry) && (log_oldmap == map_entry)) {
/*
* Last transaction wrote the flog, but wasn't able
* to complete the map write. So fix up the map.

2
drivers/nvdimm/btt.h
View File

@ -44,6 +44,8 @@
#define ent_e_flag(ent) (!!(ent & MAP_ERR_MASK))
#define ent_z_flag(ent) (!!(ent & MAP_TRIM_MASK))
#define set_e_flag(ent) (ent |= MAP_ERR_MASK)
/* 'normal' is both e and z flags set */
#define ent_normal(ent) (ent_e_flag(ent) && ent_z_flag(ent))
enum btt_init_state {
INIT_UNCHECKED = 0,

8
drivers/nvdimm/btt_devs.c
View File

@ -159,11 +159,19 @@ static ssize_t size_show(struct device *dev,
}
static DEVICE_ATTR_RO(size);
static ssize_t log_zero_flags_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "Y\n");
}
static DEVICE_ATTR_RO(log_zero_flags);
static struct attribute *nd_btt_attributes[] = {
&dev_attr_sector_size.attr,
&dev_attr_namespace.attr,
&dev_attr_uuid.attr,
&dev_attr_size.attr,
&dev_attr_log_zero_flags.attr,
NULL,
};

7
drivers/nvdimm/dimm_devs.c
View File

@ -11,6 +11,7 @@
* General Public License for more details.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/moduleparam.h>
#include <linux/vmalloc.h>
#include <linux/device.h>
#include <linux/ndctl.h>
@ -25,6 +26,10 @@
static DEFINE_IDA(dimm_ida);
static bool noblk;
module_param(noblk, bool, 0444);
MODULE_PARM_DESC(noblk, "force disable BLK / local alias support");
/*
* Retrieve bus and dimm handle and return if this bus supports
* get_config_data commands
@ -551,6 +556,8 @@ struct nvdimm *__nvdimm_create(struct nvdimm_bus *nvdimm_bus,
nvdimm->dimm_id = dimm_id;
nvdimm->provider_data = provider_data;
if (noblk)
flags |= 1 << NDD_NOBLK;
nvdimm->flags = flags;
nvdimm->cmd_mask = cmd_mask;
nvdimm->num_flush = num_flush;

26
drivers/nvdimm/label.c
View File

@ -392,6 +392,7 @@ int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd)
return 0; /* no label, nothing to reserve */
for_each_clear_bit_le(slot, free, nslot) {
struct nvdimm *nvdimm = to_nvdimm(ndd->dev);
struct nd_namespace_label *nd_label;
struct nd_region *nd_region = NULL;
u8 label_uuid[NSLABEL_UUID_LEN];
@ -406,6 +407,8 @@ int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd)
memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN);
flags = __le32_to_cpu(nd_label->flags);
if (test_bit(NDD_NOBLK, &nvdimm->flags))
flags &= ~NSLABEL_FLAG_LOCAL;
nd_label_gen_id(&label_id, label_uuid, flags);
res = nvdimm_allocate_dpa(ndd, &label_id,
__le64_to_cpu(nd_label->dpa),
@ -755,7 +758,7 @@ static const guid_t *to_abstraction_guid(enum nvdimm_claim_class claim_class,
static int __pmem_label_update(struct nd_region *nd_region,
struct nd_mapping *nd_mapping, struct nd_namespace_pmem *nspm,
int pos)
int pos, unsigned long flags)
{
struct nd_namespace_common *ndns = &nspm->nsio.common;
struct nd_interleave_set *nd_set = nd_region->nd_set;
@ -796,7 +799,7 @@ static int __pmem_label_update(struct nd_region *nd_region,
memcpy(nd_label->uuid, nspm->uuid, NSLABEL_UUID_LEN);
if (nspm->alt_name)
memcpy(nd_label->name, nspm->alt_name, NSLABEL_NAME_LEN);
nd_label->flags = __cpu_to_le32(NSLABEL_FLAG_UPDATING);
nd_label->flags = __cpu_to_le32(flags);
nd_label->nlabel = __cpu_to_le16(nd_region->ndr_mappings);
nd_label->position = __cpu_to_le16(pos);
nd_label->isetcookie = __cpu_to_le64(cookie);
@ -1249,13 +1252,13 @@ static int del_labels(struct nd_mapping *nd_mapping, u8 *uuid)
int nd_pmem_namespace_label_update(struct nd_region *nd_region,
struct nd_namespace_pmem *nspm, resource_size_t size)
{
int i;
int i, rc;
for (i = 0; i < nd_region->ndr_mappings; i++) {
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
struct resource *res;
int rc, count = 0;
int count = 0;
if (size == 0) {
rc = del_labels(nd_mapping, nspm->uuid);
@ -1273,7 +1276,20 @@ int nd_pmem_namespace_label_update(struct nd_region *nd_region,
if (rc < 0)
return rc;
rc = __pmem_label_update(nd_region, nd_mapping, nspm, i);
rc = __pmem_label_update(nd_region, nd_mapping, nspm, i,
NSLABEL_FLAG_UPDATING);
if (rc)
return rc;
}
if (size == 0)
return 0;
/* Clear the UPDATING flag per UEFI 2.7 expectations */
for (i = 0; i < nd_region->ndr_mappings; i++) {
struct nd_mapping *nd_mapping = &nd_region->mapping[i];
rc = __pmem_label_update(nd_region, nd_mapping, nspm, i, 0);
if (rc)
return rc;
}

18
drivers/nvdimm/namespace_devs.c
View File

@ -138,6 +138,7 @@ bool nd_is_uuid_unique(struct device *dev, u8 *uuid)
bool pmem_should_map_pages(struct device *dev)
{
struct nd_region *nd_region = to_nd_region(dev->parent);
struct nd_namespace_common *ndns = to_ndns(dev);
struct nd_namespace_io *nsio;
if (!IS_ENABLED(CONFIG_ZONE_DEVICE))
@ -149,6 +150,9 @@ bool pmem_should_map_pages(struct device *dev)
if (is_nd_pfn(dev) || is_nd_btt(dev))
return false;
if (ndns->force_raw)
return false;
nsio = to_nd_namespace_io(dev);
if (region_intersects(nsio->res.start, resource_size(&nsio->res),
IORESOURCE_SYSTEM_RAM,
@ -1506,13 +1510,13 @@ static ssize_t __holder_class_store(struct device *dev, const char *buf)
if (dev->driver || ndns->claim)
return -EBUSY;
if (strcmp(buf, "btt") == 0 || strcmp(buf, "btt\n") == 0)
if (sysfs_streq(buf, "btt"))
ndns->claim_class = btt_claim_class(dev);
else if (strcmp(buf, "pfn") == 0 || strcmp(buf, "pfn\n") == 0)
else if (sysfs_streq(buf, "pfn"))
ndns->claim_class = NVDIMM_CCLASS_PFN;
else if (strcmp(buf, "dax") == 0 || strcmp(buf, "dax\n") == 0)
else if (sysfs_streq(buf, "dax"))
ndns->claim_class = NVDIMM_CCLASS_DAX;
else if (strcmp(buf, "") == 0 || strcmp(buf, "\n") == 0)
else if (sysfs_streq(buf, ""))
ndns->claim_class = NVDIMM_CCLASS_NONE;
else
return -EINVAL;
@ -2492,6 +2496,12 @@ static int init_active_labels(struct nd_region *nd_region)
if (!label_ent)
break;
label = nd_label_active(ndd, j);
if (test_bit(NDD_NOBLK, &nvdimm->flags)) {
u32 flags = __le32_to_cpu(label->flags);
flags &= ~NSLABEL_FLAG_LOCAL;
label->flags = __cpu_to_le32(flags);
}
label_ent->label = label;
mutex_lock(&nd_mapping->lock);

1
drivers/nvdimm/of_pmem.c
View File

@ -108,7 +108,6 @@ static struct platform_driver of_pmem_region_driver = {
.remove = of_pmem_region_remove,
.driver = {
.name = "of_pmem",
.owner = THIS_MODULE,
.of_match_table = of_pmem_region_match,
},
};

24
drivers/nvdimm/pfn_devs.c
View File

@ -580,6 +580,11 @@ int nd_pfn_probe(struct device *dev, struct nd_namespace_common *ndns)
}
EXPORT_SYMBOL(nd_pfn_probe);
static u32 info_block_reserve(void)
{
return ALIGN(SZ_8K, PAGE_SIZE);
}
/*
* We hotplug memory at section granularity, pad the reserved area from
* the previous section base to the namespace base address.
@ -593,7 +598,7 @@ static unsigned long init_altmap_base(resource_size_t base)
static unsigned long init_altmap_reserve(resource_size_t base)
{
unsigned long reserve = PHYS_PFN(SZ_8K);
unsigned long reserve = info_block_reserve() >> PAGE_SHIFT;
unsigned long base_pfn = PHYS_PFN(base);
reserve += base_pfn - PFN_SECTION_ALIGN_DOWN(base_pfn);
@ -608,6 +613,7 @@ static int __nvdimm_setup_pfn(struct nd_pfn *nd_pfn, struct dev_pagemap *pgmap)
u64 offset = le64_to_cpu(pfn_sb->dataoff);
u32 start_pad = __le32_to_cpu(pfn_sb->start_pad);
u32 end_trunc = __le32_to_cpu(pfn_sb->end_trunc);
u32 reserve = info_block_reserve();
struct nd_namespace_common *ndns = nd_pfn->ndns;
struct nd_namespace_io *nsio = to_nd_namespace_io(&ndns->dev);
resource_size_t base = nsio->res.start + start_pad;
@ -621,7 +627,7 @@ static int __nvdimm_setup_pfn(struct nd_pfn *nd_pfn, struct dev_pagemap *pgmap)
res->end -= end_trunc;
if (nd_pfn->mode == PFN_MODE_RAM) {
if (offset < SZ_8K)
if (offset < reserve)
return -EINVAL;
nd_pfn->npfns = le64_to_cpu(pfn_sb->npfns);
pgmap->altmap_valid = false;
@ -634,7 +640,7 @@ static int __nvdimm_setup_pfn(struct nd_pfn *nd_pfn, struct dev_pagemap *pgmap)
le64_to_cpu(nd_pfn->pfn_sb->npfns),
nd_pfn->npfns);
memcpy(altmap, &__altmap, sizeof(*altmap));
altmap->free = PHYS_PFN(offset - SZ_8K);
altmap->free = PHYS_PFN(offset - reserve);
altmap->alloc = 0;
pgmap->altmap_valid = true;
} else
@ -678,18 +684,17 @@ static void trim_pfn_device(struct nd_pfn *nd_pfn, u32 *start_pad, u32 *end_trun
if (region_intersects(start, size, IORESOURCE_SYSTEM_RAM,
IORES_DESC_NONE) == REGION_MIXED
|| !IS_ALIGNED(end, nd_pfn->align)
|| nd_region_conflict(nd_region, start, size + adjust))
|| nd_region_conflict(nd_region, start, size))
*end_trunc = end - phys_pmem_align_down(nd_pfn, end);
}
static int nd_pfn_init(struct nd_pfn *nd_pfn)
{
u32 dax_label_reserve = is_nd_dax(&nd_pfn->dev) ? SZ_128K : 0;
struct nd_namespace_common *ndns = nd_pfn->ndns;
struct nd_namespace_io *nsio = to_nd_namespace_io(&ndns->dev);
u32 start_pad, end_trunc, reserve = info_block_reserve();
resource_size_t start, size;
struct nd_region *nd_region;
u32 start_pad, end_trunc;
struct nd_pfn_sb *pfn_sb;
unsigned long npfns;
phys_addr_t offset;
@ -734,7 +739,7 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn)
*/
start = nsio->res.start + start_pad;
size = resource_size(&nsio->res);
npfns = PFN_SECTION_ALIGN_UP((size - start_pad - end_trunc - SZ_8K)
npfns = PFN_SECTION_ALIGN_UP((size - start_pad - end_trunc - reserve)
/ PAGE_SIZE);
if (nd_pfn->mode == PFN_MODE_PMEM) {
/*
@ -742,11 +747,10 @@ static int nd_pfn_init(struct nd_pfn *nd_pfn)
* when populating the vmemmap. This *should* be equal to
* PMD_SIZE for most architectures.
*/
offset = ALIGN(start + SZ_8K + 64 * npfns + dax_label_reserve,
offset = ALIGN(start + reserve + 64 * npfns,
max(nd_pfn->align, PMD_SIZE)) - start;
} else if (nd_pfn->mode == PFN_MODE_RAM)
offset = ALIGN(start + SZ_8K + dax_label_reserve,
nd_pfn->align) - start;
offset = ALIGN(start + reserve, nd_pfn->align) - start;
else
return -ENXIO;

7
drivers/nvdimm/region_devs.c
View File

@ -1003,6 +1003,13 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus,
if (test_bit(NDD_UNARMED, &nvdimm->flags))
ro = 1;
if (test_bit(NDD_NOBLK, &nvdimm->flags)
&& dev_type == &nd_blk_device_type) {
dev_err(&nvdimm_bus->dev, "%s: %s mapping%d is not BLK capable\n",
caller, dev_name(&nvdimm->dev), i);
return NULL;
}
}
if (dev_type == &nd_blk_device_type) {

2
include/linux/libnvdimm.h
View File

@ -42,6 +42,8 @@ enum {
NDD_SECURITY_OVERWRITE = 3,
/* tracking whether or not there is a pending device reference */
NDD_WORK_PENDING = 4,
/* ignore / filter NSLABEL_FLAG_LOCAL for this DIMM, i.e. no aliasing */
NDD_NOBLK = 5,
/* need to set a limit somewhere, but yes, this is likely overkill */
ND_IOCTL_MAX_BUFLEN = SZ_4M,

1
include/uapi/linux/ndctl.h
View File

@ -243,6 +243,7 @@ struct nd_cmd_pkg {
#define NVDIMM_FAMILY_HPE1 1
#define NVDIMM_FAMILY_HPE2 2
#define NVDIMM_FAMILY_MSFT 3
#define NVDIMM_FAMILY_HYPERV 4
#define ND_IOCTL_CALL _IOWR(ND_IOCTL, ND_CMD_CALL,\
struct nd_cmd_pkg)