user/sven/linux.git/include/uapi/linux/ndctl.h, branch v4.19.259

nfit: Add Hyper-V NVDIMM DSM command set to white list

2020-05-27T15:37:39Z

[ Upstream commit 1194c4133195dfcb6c5fc0935d54bbed872a5285 ] 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 "Virtual NVDIMM 0x1901"). Signed-off-by: Dexuan Cui Reviewed-by: Michael Kelley Signed-off-by: Dan Williams Signed-off-by: Sasha Levin

UAPI: ndctl: Fix g++-unsupported initialisation in headers

2018-11-13T19:08:32Z

[ Upstream commit 9607871f37dc3e717639694b8d0dc738f2a68efc ] The following code in the linux/ndctl header file: static inline const char *nvdimm_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_STATUS] = "ars_status", [ND_CMD_CLEAR_ERROR] = "clear_error", [ND_CMD_CALL] = "cmd_call", }; if (cmd < ARRAY_SIZE(names) && names[cmd]) return names[cmd]; return "unknown"; } is broken in a number of ways: (1) ARRAY_SIZE() is not generally defined. (2) g++ does not support "non-trivial" array initialisers fully yet. (3) Every file that calls this function will acquire a copy of names[]. The same goes for nvdimm_cmd_name(). Fix all three by converting to a switch statement where each case returns a string. That way if cmd is a constant, the compiler can trivially reduce it and, if not, the compiler can use a shared lookup table if it thinks that is more efficient. A better way would be to remove these functions and their arrays from the header entirely. Signed-off-by: David Howells Signed-off-by: Dan Williams Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

libnvdimm, namespace: make min namespace size 4K

2018-02-02T05:27:22Z

The arbitrary 4MB minimum namespace size turns out to be too large for some environments. Quoting Cheng-mean Liu: In the case of emulated NVDIMM devices in the VM environment, there are scenarios that NVDIMM device with much smaller sizes are desired, for example, we might use a single enumerated NVDIMM DAX device for representing each container layer, which in some cases could be just a few KBs size. PAGE_SIZE is the minimum where we can still support DAX of at least a single page. Cc: Matthew Wilcox Reported-by: Cheng-mean Liu Signed-off-by: Dan Williams

nfit, libnvdimm: deprecate the generic SMART ioctl

2017-12-04T18:19:20Z

The kernel's ND_IOCTL_SMART_THRESHOLD command is based on a payload definition that has become broken / out-of-sync with recent versions of the NVDIMM_FAMILY_INTEL definition. Deprecate the use of the ND_IOCTL_SMART_THRESHOLD command in favor of the ND_CMD_CALL approach taken by NVDIMM_FAMILY_{HPE,MSFT}, where we can manage the per-vendor variance in userspace. In a couple years, when the new scheme is widely deployed in userspace packages, the ND_IOCTL_SMART_THRESHOLD support can be removed. For now we prevent new binaries from compiling against the kernel header definitions, but kernel still compatible with old binaries. The libndctl.h [1] header is now the authoritative interface definition for NVDIMM SMART. [1]: https://github.com/pmem/ndctl Signed-off-by: Dan Williams

libnvdimm: clean up command definitions

2017-08-28T15:33:20Z

Remove the command payloads that do not have an associated libnvdimm ioctl. I.e. remove the payloads that would only ever be carried in the ND_CMD_CALL envelope. This prevents userspace from growing unnecessary dependencies on this kernel header when userspace already has everything it needs to craft and send these commands. Cc: Jerry Hoemann Reported-by: Yasunori Goto Signed-off-by: Dan Williams

acpi/nfit: Issue Start ARS to retrieve existing records

2017-07-02T16:56:37Z

ACPI 6.2 defines in section 9.20.7.2 that the OSPM may call a Start ARS with Flags Bit [1] set upon receiving the 0x81 notification. Upon receiving the notification, the OSPM may decide to issue a Start ARS with Flags Bit [1] set to prepare for the retrieval of existing records and issue the Query ARS Status function to retrieve the records. Add support to call a Start ARS from acpi_nfit_uc_error_notify() with ND_ARS_RETURN_PREV_DATA set when HW_ERROR_SCRUB_ON is not set. Link: http://www.uefi.org/sites/default/files/resources/ACPI_6_2.pdf Signed-off-by: Toshi Kani Cc: Dan Williams Cc: Rafael J. Wysocki Cc: Vishal Verma Cc: Linda Knippers Signed-off-by: Dan Williams

libnvdimm: New ACPI 6.2 DSM functions

2017-07-01T15:49:59Z

ACPI 6.2 added new NVDIMM root DSM functions. Define their data structures. Signed-off-by: Jerry Hoemann Signed-off-by: Dan Williams

acpi, nfit: Enable DSM pass thru for root functions.

2017-07-01T15:49:59Z

Set ND_CMD_CALL in the cmd_mask to enable calling root functions via the pass thru mechanism. Signed-off-by: Jerry Hoemann Signed-off-by: Dan Williams

libnvdimm: handle locked label storage areas

2017-05-04T22:41:39Z

Per the latest version of the "NVDIMM DSM Interface Example" [1], the label data retrieval routine can report a "locked" status. In this case all regions associated with that DIMM are disabled until the label area is unlocked. Provide generic libnvdimm enabling for NVDIMMs with label data area locking capabilities. [1]: http://pmem.io/documents/ Signed-off-by: Dan Williams

libnvdimm: fix SMART Health DSM payload definition

2016-08-15T18:07:21Z

"NVDIMM DSM Interface Example" v1.2 made an incompatible change to the layout of function1 "SMART and Health Info". While the kernel does not directly consume this payload, it does define it in ndctl.h that userpace utilities consume. Reported-by: Brian Boylston Signed-off-by: Dan Williams