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/usr/src/linux-headers-5.15.0-190/arch/powerpc/include/uapi/asm/

/usr/src/linux-headers-5.15.0-190/arch/powerpc/include/uapi/asm

Name	Size	Mode	Actions
auxvec.h	1774	0644	edit dl rm
bitsperlong.h	312	0644	edit dl rm
bootx.h	4417	0644	edit dl rm
byteorder.h	550	0644	edit dl rm
cputable.h	2399	0644	edit dl rm
eeh.h	2233	0644	edit dl rm
elf.h	13356	0644	edit dl rm
epapr_hcalls.h	4274	0644	edit dl rm
errno.h	278	0644	edit dl rm
fcntl.h	367	0644	edit dl rm
ioctl.h	302	0644	edit dl rm
ioctls.h	4359	0644	edit dl rm
ipcbuf.h	1057	0644	edit dl rm
Kbuild	89	0644	edit dl rm
kvm.h	24887	0644	edit dl rm
kvm_para.h	2793	0644	edit dl rm
mman.h	1294	0644	edit dl rm
msgbuf.h	1159	0644	edit dl rm
nvram.h	2077	0644	edit dl rm
opal-prd.h	1782	0644	edit dl rm
papr_pdsm.h	5287	0644	edit dl rm
perf_event.h	565	0644	edit dl rm
perf_regs.h	2343	0644	edit dl rm
posix_types.h	594	0644	edit dl rm
ps3fb.h	1781	0644	edit dl rm
ptrace.h	7787	0644	edit dl rm
sembuf.h	1144	0644	edit dl rm
setup.h	203	0644	edit dl rm
shmbuf.h	1661	0644	edit dl rm
sigcontext.h	4444	0644	edit dl rm
signal.h	2504	0644	edit dl rm
socket.h	600	0644	edit dl rm
spu_info.h	832	0644	edit dl rm
stat.h	2318	0644	edit dl rm
swab.h	602	0644	edit dl rm
termbits.h	5224	0644	edit dl rm
termios.h	1712	0644	edit dl rm
tm.h	734	0644	edit dl rm
types.h	1319	0644	edit dl rm
ucontext.h	975	0644	edit dl rm
unistd.h	577	0644	edit dl rm
vas-api.h	664	0644	edit dl rm

Edit: /usr/src/linux-headers-5.15.0-190/arch/powerpc/include/uapi/asm/papr_pdsm.h (5287B)

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * PAPR nvDimm Specific Methods (PDSM) and structs for libndctl
 *
 * (C) Copyright IBM 2020
 *
 * Author: Vaibhav Jain <vaibhav at linux.ibm.com>
 */

#ifndef _UAPI_ASM_POWERPC_PAPR_PDSM_H_
#define _UAPI_ASM_POWERPC_PAPR_PDSM_H_

#include <linux/types.h>
#include <linux/ndctl.h>

/*
 * PDSM Envelope:
 *
 * The ioctl ND_CMD_CALL exchange data between user-space and kernel via
 * envelope which consists of 2 headers sections and payload sections as
 * illustrated below:
 *  +-----------------+---------------+---------------------------+
 *  |   64-Bytes      |   8-Bytes     |       Max 184-Bytes       |
 *  +-----------------+---------------+---------------------------+
 *  | ND-HEADER       |  PDSM-HEADER  |      PDSM-PAYLOAD         |
 *  +-----------------+---------------+---------------------------+
 *  | nd_family       |               |                           |
 *  | nd_size_out     | cmd_status    |                           |
 *  | nd_size_in      | reserved      |     nd_pdsm_payload       |
 *  | nd_command      | payload   --> |                           |
 *  | nd_fw_size      |               |                           |
 *  | nd_payload ---> |               |                           |
 *  +---------------+-----------------+---------------------------+
 *
 * ND Header:
 * This is the generic libnvdimm header described as 'struct nd_cmd_pkg'
 * which is interpreted by libnvdimm before passed on to papr_scm. Important
 * member fields used are:
 * 'nd_family'		: (In) NVDIMM_FAMILY_PAPR_SCM
 * 'nd_size_in'		: (In) PDSM-HEADER + PDSM-IN-PAYLOAD (usually 0)
 * 'nd_size_out'        : (In) PDSM-HEADER + PDSM-RETURN-PAYLOAD
 * 'nd_command'         : (In) One of PAPR_PDSM_XXX
 * 'nd_fw_size'         : (Out) PDSM-HEADER + size of actual payload returned
 *
 * PDSM Header:
 * This is papr-scm specific header that precedes the payload. This is defined
 * as nd_cmd_pdsm_pkg.  Following fields aare available in this header:
 *
 * 'cmd_status'		: (Out) Errors if any encountered while servicing PDSM.
 * 'reserved'		: Not used, reserved for future and should be set to 0.
 * 'payload'            : A union of all the possible payload structs
 *
 * PDSM Payload:
 *
 * The layout of the PDSM Payload is defined by various structs shared between
 * papr_scm and libndctl so that contents of payload can be interpreted. As such
 * its defined as a union of all possible payload structs as
 * 'union nd_pdsm_payload'. Based on the value of 'nd_cmd_pkg.nd_command'
 * appropriate member of the union is accessed.
 */

/* Max payload size that we can handle */
#define ND_PDSM_PAYLOAD_MAX_SIZE 184

/* Max payload size that we can handle */
#define ND_PDSM_HDR_SIZE \
	(sizeof(struct nd_pkg_pdsm) - ND_PDSM_PAYLOAD_MAX_SIZE)

/* Various nvdimm health indicators */
#define PAPR_PDSM_DIMM_HEALTHY       0
#define PAPR_PDSM_DIMM_UNHEALTHY     1
#define PAPR_PDSM_DIMM_CRITICAL      2
#define PAPR_PDSM_DIMM_FATAL         3

/* struct nd_papr_pdsm_health.extension_flags field flags */

/* Indicate that the 'dimm_fuel_gauge' field is valid */
#define PDSM_DIMM_HEALTH_RUN_GAUGE_VALID 1

/* Indicate that the 'dimm_dsc' field is valid */
#define PDSM_DIMM_DSC_VALID 2

/*
 * Struct exchanged between kernel & ndctl in for PAPR_PDSM_HEALTH
 * Various flags indicate the health status of the dimm.
 *
 * extension_flags	: Any extension fields present in the struct.
 * dimm_unarmed		: Dimm not armed. So contents wont persist.
 * dimm_bad_shutdown	: Previous shutdown did not persist contents.
 * dimm_bad_restore	: Contents from previous shutdown werent restored.
 * dimm_scrubbed	: Contents of the dimm have been scrubbed.
 * dimm_locked		: Contents of the dimm cant be modified until CEC reboot
 * dimm_encrypted	: Contents of dimm are encrypted.
 * dimm_health		: Dimm health indicator. One of PAPR_PDSM_DIMM_XXXX
 * dimm_fuel_gauge	: Life remaining of DIMM as a percentage from 0-100
 */
struct nd_papr_pdsm_health {
	union {
		struct {
			__u32 extension_flags;
			__u8 dimm_unarmed;
			__u8 dimm_bad_shutdown;
			__u8 dimm_bad_restore;
			__u8 dimm_scrubbed;
			__u8 dimm_locked;
			__u8 dimm_encrypted;
			__u16 dimm_health;

/* Extension flag PDSM_DIMM_HEALTH_RUN_GAUGE_VALID */
			__u16 dimm_fuel_gauge;

/* Extension flag PDSM_DIMM_DSC_VALID */
			__u64 dimm_dsc;
		};
		__u8 buf[ND_PDSM_PAYLOAD_MAX_SIZE];
	};
};

/*
 * Methods to be embedded in ND_CMD_CALL request. These are sent to the kernel
 * via 'nd_cmd_pkg.nd_command' member of the ioctl struct
 */
enum papr_pdsm {
	PAPR_PDSM_MIN = 0x0,
	PAPR_PDSM_HEALTH,
	PAPR_PDSM_MAX,
};

/* Maximal union that can hold all possible payload types */
union nd_pdsm_payload {
	struct nd_papr_pdsm_health health;
	__u8 buf[ND_PDSM_PAYLOAD_MAX_SIZE];
} __packed;

/*
 * PDSM-header + payload expected with ND_CMD_CALL ioctl from libnvdimm
 * Valid member of union 'payload' is identified via 'nd_cmd_pkg.nd_command'
 * that should always precede this struct when sent to papr_scm via CMD_CALL
 * interface.
 */
struct nd_pkg_pdsm {
	__s32 cmd_status;	/* Out: Sub-cmd status returned back */
	__u16 reserved[2];	/* Ignored and to be set as '0' */
	union nd_pdsm_payload payload;
} __packed;

#endif /* _UAPI_ASM_POWERPC_PAPR_PDSM_H_ */

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