January 2019 - Linux-nvdimm

[PATCH] nfit: Document sysfs interface dirty_shutdown

by Dexuan Cui

The new sysfs node was added in Sep 2018 in: commit 0ead11181fe0 ("acpi, nfit: Collect shutdown status") Now let's document it. Signed-off-by: Dexuan Cui <decui(a)microsoft.com> --- Documentation/ABI/testing/sysfs-bus-nfit | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-nfit b/Documentation/ABI/testing/sysfs-bus-nfit index a1cb44dcb908..bd6cde8c0ea9 100644 --- a/Documentation/ABI/testing/sysfs-bus-nfit +++ b/Documentation/ABI/testing/sysfs-bus-nfit @@ -153,6 +153,14 @@ Description: subsystem controller vendor. +What: /sys/bus/nd/devices/nmemX/nfit/dirty_shutdown +Date: Sep, 2018 +KernelVersion: v4.20 +Contact: linux-nvdimm(a)lists.01.org +Description: + (RO) Unsafe Shutdown Count for the NVDIMM device. + + What: /sys/bus/nd/devices/ndbusX/nfit/revision Date: Jun, 2015 KernelVersion: v4.2 -- 2.19.1

1 year, 4 months

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[ndctl PATCH] libndctl: Fix the failure interpretation for status translations

by Vishal Verma

commit 62bbfce3cb62 ("libndctl, intel: Add infrastructure for firmware_status translation") has the unfortunate side effect of making all NDCTL commands fail with -ENOMSG unless an xlat_firmware_status function is defined for the DIMM family. A failure to translate just means proceed with the information that we do have, not report a command failure. Fixes: 62bbfce3cb62 ("libndctl, intel: Add infrastructure for firmware_status translation") Reported-by: Oliver O'Halloran <oohall(a)gmail.com> Based-on-patch-by: Dan Williams <dan.j.williams(a)intel.com> Signed-off-by: Vishal Verma <vishal.l.verma(a)intel.com> --- ndctl/lib/libndctl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/ndctl/lib/libndctl.c b/ndctl/lib/libndctl.c index 830b791..2fa8916 100644 --- a/ndctl/lib/libndctl.c +++ b/ndctl/lib/libndctl.c @@ -2710,7 +2710,7 @@ NDCTL_EXPORT int ndctl_cmd_xlat_firmware_status(struct ndctl_cmd *cmd) struct ndctl_dimm_ops *ops = dimm ? dimm->ops : NULL; if (!dimm || !ops || !ops->xlat_firmware_status) - return -ENOMSG; + return 0; return ops->xlat_firmware_status(cmd); } -- 2.20.1

1 year, 4 months

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[PATCH] nfit: Collect shutdown status for NVDIMM_FAMILY_HYPERV

by Dexuan Cui

See http://www.uefi.org/RFIC_LIST ("Virtual NVDIMM 0x1901"): "Get Unsafe Shutdown Count (Function Index 2)". Let's expose the info to the userspace (e.g. ntctl) via sysfs. Signed-off-by: Dexuan Cui <decui(a)microsoft.com> --- drivers/acpi/nfit/core.c | 51 ++++++++++++++++++++++++++++++++++++++ drivers/acpi/nfit/hyperv.h | 26 +++++++++++++++++++ 2 files changed, 77 insertions(+) create mode 100644 drivers/acpi/nfit/hyperv.h diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c index d5a164b6833a..d504da34ce34 100644 --- a/drivers/acpi/nfit/core.c +++ b/drivers/acpi/nfit/core.c @@ -25,6 +25,7 @@ #include <asm/cacheflush.h> #include <acpi/nfit.h> #include "intel.h" +#include "hyperv.h" #include "nfit.h" /* @@ -1802,6 +1803,54 @@ __weak void nfit_intel_shutdown_status(struct nfit_mem *nfit_mem) } } +__weak void nfit_hyperv_shutdown_status(struct nfit_mem *nfit_mem) +{ + struct device *dev = &nfit_mem->adev->dev; + struct nd_hyperv_shutdown_status status; + union acpi_object in_buf = { + .buffer.type = ACPI_TYPE_BUFFER, + .buffer.length = 0, + }; + union acpi_object in_obj = { + .package.type = ACPI_TYPE_PACKAGE, + .package.count = 1, + .package.elements = &in_buf, + }; + const u8 func = ND_HYPERV_GET_UNSAFE_SHUTDOWN_COUNT; + const guid_t *guid = to_nfit_uuid(nfit_mem->family); + u8 revid = nfit_dsm_revid(nfit_mem->family, func); + struct acpi_device *adev = nfit_mem->adev; + acpi_handle handle = adev->handle; + union acpi_object *out_obj; + + if ((nfit_mem->dsm_mask & BIT(func)) == 0) + return; + + out_obj = acpi_evaluate_dsm(handle, guid, revid, func, &in_obj); + if (!out_obj || out_obj->type != ACPI_TYPE_BUFFER + || out_obj->buffer.length < sizeof(status)) { + dev_dbg(dev->parent, + "%s: failed to get Unsafe Shutdown Count\n", + dev_name(dev)); + ACPI_FREE(out_obj); + return; + } + + memcpy(&status, out_obj->buffer.pointer, sizeof(status)); + ACPI_FREE(out_obj); + + if (status.general_err != 0) { + dev_dbg(dev->parent, + "%s: failed to get Unsafe Shutdown Count: err=0x%x\n", + dev_name(dev), status.status); + return; + } + + set_bit(NFIT_MEM_DIRTY_COUNT, &nfit_mem->flags); + nfit_mem->dirty_shutdown = status.shutdown_count; +} + + static void populate_shutdown_status(struct nfit_mem *nfit_mem) { /* @@ -1811,6 +1860,8 @@ static void populate_shutdown_status(struct nfit_mem *nfit_mem) */ if (nfit_mem->family == NVDIMM_FAMILY_INTEL) nfit_intel_shutdown_status(nfit_mem); + else if (nfit_mem->family == NVDIMM_FAMILY_HYPERV) + nfit_hyperv_shutdown_status(nfit_mem); } static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc, diff --git a/drivers/acpi/nfit/hyperv.h b/drivers/acpi/nfit/hyperv.h new file mode 100644 index 000000000000..c4a25b8624cc --- /dev/null +++ b/drivers/acpi/nfit/hyperv.h @@ -0,0 +1,26 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright(c) 2019 Microsoft Corporation. All rights reserved. + * Hyper-V specific definitions for _DSM of Hyper-V Virtual NVDIMM + * + * See http://www.uefi.org/RFIC_LIST (Virtual NVDIMM 0x1901) + */ +#ifndef _NFIT_HYPERV_H_ +#define _NFIT_HYPERV_H_ + +#define ND_HYPERV_GET_UNSAFE_SHUTDOWN_COUNT 2 + +struct nd_hyperv_shutdown_status { + union { + u32 status; + struct { + u16 general_err; + u8 func_err; + u8 vendor_err; + }; + }; + u32 shutdown_count; +} __packed; + + +#endif -- 2.19.1

1 year, 4 months

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[PATCH] nfit: acpi_nfit_ctl(): check out_obj->type in the right place

by Dexuan Cui

In the case of ND_CMD_CALL, we should also check out_obj->type. The patch uses out_obj->type, which is a short alias to out_obj->package.type. Fixes: 31eca76ba2fc ("nfit, libnvdimm: limited/whitelisted dimm command marshaling mechanism") Cc: <stable(a)vger.kernel.org> Signed-off-by: Dexuan Cui <decui(a)microsoft.com> --- drivers/acpi/nfit/core.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c index 0a49c57334cc..1fa378435dd2 100644 --- a/drivers/acpi/nfit/core.c +++ b/drivers/acpi/nfit/core.c @@ -554,6 +554,13 @@ 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 +579,6 @@ 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, -- 2.19.1

1 year, 4 months

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[PATCH v3 1/6] libndctl: Use the supported_alignment attribute

by Oliver O'Halloran

Newer kernels provide the "supported_alignments" sysfs attribute that indicates what alignments can be used with a PFN or DAX namespace. This patch adds the plumbing inside of libndctl to allow users to query this information through using: ndctl_{dax|pfn}_get_supported_alignment(), and ndctl_{dax|pfn}_get_num_alignments() Signed-off-by: Oliver O'Halloran <oohall(a)gmail.com> --- v3: Changed the return type of the *_get_supported_alignment() functions to unsigned long to match the existing *_get_alignment() functions. --- ndctl/lib/libndctl.c | 40 ++++++++++++++++++++++++++++++++++++++++ ndctl/lib/libndctl.sym | 7 +++++++ ndctl/libndctl.h | 6 ++++++ 3 files changed, 53 insertions(+) diff --git a/ndctl/lib/libndctl.c b/ndctl/lib/libndctl.c index 0c3a35e5bcc9..53369b5c9886 100644 --- a/ndctl/lib/libndctl.c +++ b/ndctl/lib/libndctl.c @@ -31,6 +31,7 @@ #include <ccan/build_assert/build_assert.h> #include <ndctl.h> +#include <util/size.h> #include <util/sysfs.h> #include <ndctl/libndctl.h> #include <ndctl/namespace.h> @@ -237,6 +238,7 @@ struct ndctl_pfn { int buf_len; uuid_t uuid; int id, generation; + struct ndctl_lbasize alignments; }; struct ndctl_dax { @@ -4781,6 +4783,18 @@ static void *__add_pfn(struct ndctl_pfn *pfn, const char *pfn_base) else pfn->size = strtoull(buf, NULL, 0); + /* + * If the kernel doesn't provide the supported_alignments sysfs + * attribute then it's safe to assume that we are running on x86 + * which will always support 2MB and 4KB alignments. + */ + sprintf(path, "%s/supported_alignments", pfn_base); + if (sysfs_read_attr(ctx, path, buf) < 0) + sprintf(buf, "%d %d", SZ_4K, SZ_2M); + + if (parse_lbasize_supported(ctx, pfn_base, buf, &pfn->alignments) < 0) + goto err_read; + free(path); return pfn; @@ -5015,6 +5029,22 @@ NDCTL_EXPORT int ndctl_pfn_set_align(struct ndctl_pfn *pfn, unsigned long align) return 0; } +NDCTL_EXPORT int ndctl_pfn_get_num_alignments(struct ndctl_pfn *pfn) +{ + return pfn->alignments.num; +} + +NDCTL_EXPORT unsigned long ndctl_pfn_get_supported_alignment(struct ndctl_pfn *pfn, int i) +{ + if (pfn->alignments.num == 0) + return 0; + + if (i < 0 || i > pfn->alignments.num) + return -1; + else + return pfn->alignments.supported[i]; +} + NDCTL_EXPORT int ndctl_pfn_set_namespace(struct ndctl_pfn *pfn, struct ndctl_namespace *ndns) { @@ -5237,6 +5267,16 @@ NDCTL_EXPORT unsigned long ndctl_dax_get_align(struct ndctl_dax *dax) return ndctl_pfn_get_align(&dax->pfn); } +NDCTL_EXPORT int ndctl_dax_get_num_alignments(struct ndctl_dax *dax) +{ + return ndctl_pfn_get_num_alignments(&dax->pfn); +} + +NDCTL_EXPORT unsigned long ndctl_dax_get_supported_alignment(struct ndctl_dax *dax, int i) +{ + return ndctl_pfn_get_supported_alignment(&dax->pfn, i); +} + NDCTL_EXPORT int ndctl_dax_has_align(struct ndctl_dax *dax) { return ndctl_pfn_has_align(&dax->pfn); diff --git a/ndctl/lib/libndctl.sym b/ndctl/lib/libndctl.sym index 6c4c8b4dfb8e..0103c1b71a1d 100644 --- a/ndctl/lib/libndctl.sym +++ b/ndctl/lib/libndctl.sym @@ -385,3 +385,10 @@ global: ndctl_namespace_get_next_badblock; ndctl_dimm_get_dirty_shutdown; } LIBNDCTL_17; + +LIBNDCTL_19 { + ndctl_pfn_get_supported_alignment; + ndctl_pfn_get_num_alignments; + ndctl_dax_get_supported_alignment; + ndctl_dax_get_num_alignments; +} LIBNDCTL_18; diff --git a/ndctl/libndctl.h b/ndctl/libndctl.h index 62cef9e82da3..0f1f66256c1d 100644 --- a/ndctl/libndctl.h +++ b/ndctl/libndctl.h @@ -681,6 +681,12 @@ enum ND_FW_STATUS ndctl_cmd_fw_xlat_firmware_status(struct ndctl_cmd *cmd); struct ndctl_cmd *ndctl_dimm_cmd_new_ack_shutdown_count(struct ndctl_dimm *dimm); int ndctl_dimm_fw_update_supported(struct ndctl_dimm *dimm); +int ndctl_pfn_get_num_alignments(struct ndctl_pfn *pfn); +unsigned long ndctl_pfn_get_supported_alignment(struct ndctl_pfn *pfn, int i); + +int ndctl_dax_get_num_alignments(struct ndctl_dax *dax); +unsigned long ndctl_dax_get_supported_alignment(struct ndctl_dax *dax, int i); + #ifdef __cplusplus } /* extern "C" */ #endif -- 2.20.1

1 year, 4 months

4
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[PATCH v4 1/5] libndctl: Use the supported_alignment attribute

by Oliver O'Halloran

Newer kernels provide the "supported_alignments" sysfs attribute that indicates what alignments can be used with a PFN or DAX namespace. This patch adds the plumbing inside of libndctl to allow users to query this information through using: ndctl_{dax|pfn}_get_supported_alignment(), and ndctl_{dax|pfn}_get_num_alignments() Signed-off-by: Oliver O'Halloran <oohall(a)gmail.com> --- v4: Changed return code of ndctl_pfn_get_supported_alignment from -1 to -1 to -EINVAL. Reworded comment about why we default to 4K and 2M alignments when the sysfs attribute is missing. Shuffled around prototypes in ndctl.h. 80 char compliance fixes. rebased onto pending branch v3: Changed the return type of the *_get_supported_alignment() functions to unsigned long to match the existing *_get_alignment() functions. --- ndctl/lib/libndctl.c | 44 ++++++++++++++++++++++++++++++++++++++++++ ndctl/lib/libndctl.sym | 4 ++++ ndctl/libndctl.h | 4 ++++ 3 files changed, 52 insertions(+) diff --git a/ndctl/lib/libndctl.c b/ndctl/lib/libndctl.c index 830b791339d2..64cd2996bbd9 100644 --- a/ndctl/lib/libndctl.c +++ b/ndctl/lib/libndctl.c @@ -31,6 +31,7 @@ #include <ccan/build_assert/build_assert.h> #include <ndctl.h> +#include <util/size.h> #include <util/sysfs.h> #include <ndctl/libndctl.h> #include <ndctl/namespace.h> @@ -237,6 +238,7 @@ struct ndctl_pfn { int buf_len; uuid_t uuid; int id, generation; + struct ndctl_lbasize alignments; }; struct ndctl_dax { @@ -4814,6 +4816,20 @@ static void *__add_pfn(struct ndctl_pfn *pfn, const char *pfn_base) else pfn->size = strtoull(buf, NULL, 0); + /* + * The supported_alignments attribute was added before arches other + * than x86 had pmem support. If the kernel doesn't provide the + * attribute then it's safe to a attribute then it's safe to assume + * that we are on x86 which will always support 2MB and 4KB + * alignments. + */ + sprintf(path, "%s/supported_alignments", pfn_base); + if (sysfs_read_attr(ctx, path, buf) < 0) + sprintf(buf, "%d %d", SZ_4K, SZ_2M); + + if (parse_lbasize_supported(ctx, pfn_base, buf, &pfn->alignments) < 0) + goto err_read; + free(path); return pfn; @@ -5048,6 +5064,23 @@ NDCTL_EXPORT int ndctl_pfn_set_align(struct ndctl_pfn *pfn, unsigned long align) return 0; } +NDCTL_EXPORT int ndctl_pfn_get_num_alignments(struct ndctl_pfn *pfn) +{ + return pfn->alignments.num; +} + +NDCTL_EXPORT unsigned long ndctl_pfn_get_supported_alignment( + struct ndctl_pfn *pfn, int i) +{ + if (pfn->alignments.num == 0) + return 0; + + if (i < 0 || i > pfn->alignments.num) + return -EINVAL; + else + return pfn->alignments.supported[i]; +} + NDCTL_EXPORT int ndctl_pfn_set_namespace(struct ndctl_pfn *pfn, struct ndctl_namespace *ndns) { @@ -5270,6 +5303,17 @@ NDCTL_EXPORT unsigned long ndctl_dax_get_align(struct ndctl_dax *dax) return ndctl_pfn_get_align(&dax->pfn); } +NDCTL_EXPORT int ndctl_dax_get_num_alignments(struct ndctl_dax *dax) +{ + return ndctl_pfn_get_num_alignments(&dax->pfn); +} + +NDCTL_EXPORT unsigned long ndctl_dax_get_supported_alignment( + struct ndctl_dax *dax, int i) +{ + return ndctl_pfn_get_supported_alignment(&dax->pfn, i); +} + NDCTL_EXPORT int ndctl_dax_has_align(struct ndctl_dax *dax) { return ndctl_pfn_has_align(&dax->pfn); diff --git a/ndctl/lib/libndctl.sym b/ndctl/lib/libndctl.sym index 275db92ee103..a30a93e3c012 100644 --- a/ndctl/lib/libndctl.sym +++ b/ndctl/lib/libndctl.sym @@ -390,4 +390,8 @@ LIBNDCTL_19 { global: ndctl_cmd_xlat_firmware_status; ndctl_cmd_submit_xlat; + ndctl_pfn_get_supported_alignment; + ndctl_pfn_get_num_alignments; + ndctl_dax_get_supported_alignment; + ndctl_dax_get_num_alignments; } LIBNDCTL_18; diff --git a/ndctl/libndctl.h b/ndctl/libndctl.h index e55a5932781d..ac639b7d9142 100644 --- a/ndctl/libndctl.h +++ b/ndctl/libndctl.h @@ -597,7 +597,9 @@ int ndctl_pfn_set_uuid(struct ndctl_pfn *pfn, uuid_t uu); void ndctl_pfn_get_uuid(struct ndctl_pfn *pfn, uuid_t uu); int ndctl_pfn_has_align(struct ndctl_pfn *pfn); int ndctl_pfn_set_align(struct ndctl_pfn *pfn, unsigned long align); +int ndctl_pfn_get_num_alignments(struct ndctl_pfn *pfn); unsigned long ndctl_pfn_get_align(struct ndctl_pfn *pfn); +unsigned long ndctl_pfn_get_supported_alignment(struct ndctl_pfn *pfn, int i); unsigned long long ndctl_pfn_get_resource(struct ndctl_pfn *pfn); unsigned long long ndctl_pfn_get_size(struct ndctl_pfn *pfn); int ndctl_pfn_set_namespace(struct ndctl_pfn *pfn, struct ndctl_namespace *ndns); @@ -628,7 +630,9 @@ unsigned long long ndctl_dax_get_resource(struct ndctl_dax *dax); int ndctl_dax_set_uuid(struct ndctl_dax *dax, uuid_t uu); enum ndctl_pfn_loc ndctl_dax_get_location(struct ndctl_dax *dax); int ndctl_dax_set_location(struct ndctl_dax *dax, enum ndctl_pfn_loc loc); +int ndctl_dax_get_num_alignments(struct ndctl_dax *dax); unsigned long ndctl_dax_get_align(struct ndctl_dax *dax); +unsigned long ndctl_dax_get_supported_alignment(struct ndctl_dax *dax, int i); int ndctl_dax_has_align(struct ndctl_dax *dax); int ndctl_dax_set_align(struct ndctl_dax *dax, unsigned long align); int ndctl_dax_set_namespace(struct ndctl_dax *dax, -- 2.20.1

1 year, 4 months

2
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[PATCH] nfit: Fix nfit_intel_shutdown_status() command submission

by Dan Williams

The implementation is broken in all the ways the unit test did not touch: 1/ The local definition of in_buf and in_obj violated C99 initializer expectations for zeroing. By only initializing 2 out of the three struct members the compiler was free to zero-initialize the remaining entry even though the aliased location in the union was initialized. 2/ The implementation made assumptions about the state of the 'smart' payload after command execution that are satisfied by acpi_nfit_ctl(), but not acpi_evaluate_dsm(). 3/ populate_shutdown_status() is skipped on Intel NVDIMMs due to the early return for skipping the common _LS{I,R,W} enabling. 4/ The input length should be zero. This breakage was missed due to the unit test implementation only testing the case where nfit_intel_shutdown_status() returns a valid payload. Much of this complexity would be saved if acpi_nfit_ctl() could be used, but that currently requires a 'struct nvdimm *' argument and one is not created until later in the init process. The health result is needed before the device is created because the payload gates whether the nmemX/nfit/dirty_shutdown property is visible in sysfs. Cc: <stable(a)vger.kernel.org> Fixes: 0ead11181fe0 ("acpi, nfit: Collect shutdown status") Reported-by: Dexuan Cui <decui(a)microsoft.com> Signed-off-by: Dan Williams <dan.j.williams(a)intel.com> --- drivers/acpi/nfit/core.c | 41 ++++++++++++++++++++++++----------------- 1 file changed, 24 insertions(+), 17 deletions(-) diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c index e18ade5d74e9..0a49c57334cc 100644 --- a/drivers/acpi/nfit/core.c +++ b/drivers/acpi/nfit/core.c @@ -1759,14 +1759,14 @@ 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 +1781,15 @@ __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 +1800,6 @@ __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) @@ -1915,18 +1921,19 @@ 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; - - 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); - } + /* 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 (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); + } } populate_shutdown_status(nfit_mem);

1 year, 4 months

2
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[PATCH] nfit: add Hyper-V NVDIMM DSM command set to white list

by Dexuan Cui

Add the Hyper-V _DSM command set to the white list of NVDIMM command sets. This command set is documented at http://www.uefi.org/RFIC_LIST (see the link to "Virtual NVDIMM 0x1901" on the page). Signed-off-by: Dexuan Cui <decui(a)microsoft.com> --- I'm going to change the user-space utility "ndctl" to support Hyper-V Virtual NVDIMM. This kernel patch is required first. drivers/acpi/nfit/core.c | 5 ++++- drivers/acpi/nfit/nfit.h | 6 +++++- include/uapi/linux/ndctl.h | 1 + 3 files changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c index 011d3db19c80..fb48cb17a519 100644 --- a/drivers/acpi/nfit/core.c +++ b/drivers/acpi/nfit/core.c @@ -1840,7 +1840,7 @@ 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 + * Until standardization materializes we need to consider 5 * different command sets. Note, that checking for function0 (bit0) * tells us if any commands are reachable through this GUID. */ @@ -1865,6 +1865,8 @@ 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; @@ -3707,6 +3709,7 @@ 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) diff --git a/drivers/acpi/nfit/nfit.h b/drivers/acpi/nfit/nfit.h index 33691aecfcee..9194022f29f3 100644 --- a/drivers/acpi/nfit/nfit.h +++ b/drivers/acpi/nfit/nfit.h @@ -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 */ +#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, diff --git a/include/uapi/linux/ndctl.h b/include/uapi/linux/ndctl.h index f57c9e434d2d..de5d90212409 100644 --- a/include/uapi/linux/ndctl.h +++ b/include/uapi/linux/ndctl.h @@ -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) -- 2.19.1

1 year, 4 months

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[PATCH] MAINTAINERS: Update filesystem-dax and NVDIMM entries

by Dan Williams

Ross has moved on to other areas. Matthew and Jan are trusted reviewers for DAX. Dan is now coordinating filesystem-dax pull requests. Ira and Keith are now involved with the NVDIMM and Device-DAX sub-systems. The linux-nvdimm mailing hosts a patchwork instance for both DAX and NVDIMM patches. Cc: Jan Kara <jack(a)suse.cz> Cc: Ira Weiny <ira.weiny(a)intel.com> Cc: Ross Zwisler <zwisler(a)kernel.org> Cc: Keith Busch <keith.busch(a)intel.com> Cc: Matthew Wilcox <willy(a)infradead.org> Signed-off-by: Dan Williams <dan.j.williams(a)intel.com> --- MAINTAINERS | 17 ++++++++--------- 1 file changed, 8 insertions(+), 9 deletions(-) diff --git a/MAINTAINERS b/MAINTAINERS index 51029a425dbe..5f43ee438a74 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4535,10 +4535,11 @@ S: Maintained F: drivers/i2c/busses/i2c-diolan-u2c.c FILESYSTEM DIRECT ACCESS (DAX) -M: Matthew Wilcox <willy(a)infradead.org> -M: Ross Zwisler <zwisler(a)kernel.org> -M: Jan Kara <jack(a)suse.cz> +M: Dan Williams <dan.j.williams(a)intel.com> +R: Matthew Wilcox <willy(a)infradead.org> +R: Jan Kara <jack(a)suse.cz> L: linux-fsdevel(a)vger.kernel.org +L: linux-nvdimm(a)lists.01.org S: Supported F: fs/dax.c F: include/linux/dax.h @@ -4546,9 +4547,9 @@ F: include/trace/events/fs_dax.h DEVICE DIRECT ACCESS (DAX) M: Dan Williams <dan.j.williams(a)intel.com> -M: Dave Jiang <dave.jiang(a)intel.com> -M: Ross Zwisler <zwisler(a)kernel.org> M: Vishal Verma <vishal.l.verma(a)intel.com> +M: Keith Busch <keith.busch(a)intel.com> +M: Dave Jiang <dave.jiang(a)intel.com> L: linux-nvdimm(a)lists.01.org S: Supported F: drivers/dax/ @@ -8641,7 +8642,6 @@ S: Maintained F: tools/lib/lockdep/ LIBNVDIMM BLK: MMIO-APERTURE DRIVER -M: Ross Zwisler <zwisler(a)kernel.org> M: Dan Williams <dan.j.williams(a)intel.com> M: Vishal Verma <vishal.l.verma(a)intel.com> M: Dave Jiang <dave.jiang(a)intel.com> @@ -8654,7 +8654,6 @@ F: drivers/nvdimm/region_devs.c LIBNVDIMM BTT: BLOCK TRANSLATION TABLE M: Vishal Verma <vishal.l.verma(a)intel.com> M: Dan Williams <dan.j.williams(a)intel.com> -M: Ross Zwisler <zwisler(a)kernel.org> M: Dave Jiang <dave.jiang(a)intel.com> L: linux-nvdimm(a)lists.01.org Q: https://patchwork.kernel.org/project/linux-nvdimm/list/ @@ -8662,7 +8661,6 @@ S: Supported F: drivers/nvdimm/btt* LIBNVDIMM PMEM: PERSISTENT MEMORY DRIVER -M: Ross Zwisler <zwisler(a)kernel.org> M: Dan Williams <dan.j.williams(a)intel.com> M: Vishal Verma <vishal.l.verma(a)intel.com> M: Dave Jiang <dave.jiang(a)intel.com> @@ -8681,9 +8679,10 @@ F: Documentation/devicetree/bindings/pmem/pmem-region.txt LIBNVDIMM: NON-VOLATILE MEMORY DEVICE SUBSYSTEM M: Dan Williams <dan.j.williams(a)intel.com> -M: Ross Zwisler <zwisler(a)kernel.org> M: Vishal Verma <vishal.l.verma(a)intel.com> M: Dave Jiang <dave.jiang(a)intel.com> +M: Keith Busch <keith.busch(a)intel.com> +M: Ira Weiny <ira.weiny(a)intel.com> L: linux-nvdimm(a)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

1 year, 4 months