@@ -21,6 +21,7 @@ libndctl_la_SOURCES =\
hpe1.c \
msft.c \
hyperv.c \
+ papr_scm.c \
ars.c \
firmware.c \
libndctl.c
new file mode 100644
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2020 IBM 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.
+ */
+#include <stdint.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <endian.h>
+#include <util/log.h>
+#include <ndctl.h>
+#include <ndctl/libndctl.h>
+#include <lib/private.h>
+#include <papr_scm_dsm.h>
+
+static bool papr_cmd_is_supported(struct ndctl_dimm *dimm, int cmd)
+{
+ /* Handle this separately to support monitor mode */
+ if (cmd == ND_CMD_SMART)
+ return true;
+
+ return !!(dimm->cmd_mask & (1ULL << cmd));
+}
+
+struct ndctl_dimm_ops * const papr_scm_dimm_ops = &(struct ndctl_dimm_ops) {
+ .cmd_is_supported = papr_cmd_is_supported,
+};
new file mode 100644
@@ -0,0 +1,143 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
+/*
+ * PAPR SCM Device specific methods for libndctl and ndctl
+ *
+ * (C) Copyright IBM 2020
+ *
+ * Author: Vaibhav Jain <vaibhav at linux.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _UAPI_ASM_POWERPC_PAPR_SCM_DSM_H_
+#define _UAPI_ASM_POWERPC_PAPR_SCM_DSM_H_
+
+#include <linux/types.h>
+
+#ifdef __KERNEL__
+#include <linux/ndctl.h>
+#else
+#include <ndctl.h>
+#endif
+
+/*
+ * Sub commands for ND_CMD_CALL. To prevent overlap from ND_CMD_*, values for
+ * these enums start at 0x10000. These values are then returned from
+ * cmd_to_func() making it easy to implement the switch-case block in
+ * papr_scm_ndctl()
+ */
+enum dsm_papr_scm {
+ DSM_PAPR_SCM_MIN = 0x10000,
+ DSM_PAPR_SCM_HEALTH,
+ DSM_PAPR_SCM_STATS,
+ DSM_PAPR_SCM_MAX,
+};
+
+enum dsm_papr_scm_dimm_health {
+ DSM_PAPR_SCM_DIMM_HEALTHY,
+ DSM_PAPR_SCM_DIMM_UNHEALTHY,
+ DSM_PAPR_SCM_DIMM_CRITICAL,
+ DSM_PAPR_SCM_DIMM_FATAL,
+};
+
+/* Papr-scm-header + payload expected with ND_CMD_CALL ioctl from libnvdimm */
+struct nd_papr_scm_cmd_pkg {
+ struct nd_cmd_pkg hdr; /* Package header containing sub-cmd */
+ int32_t cmd_status; /* Out: Sub-cmd status returned back */
+ uint16_t payload_offset; /* In: offset from start of struct */
+ uint16_t payload_version; /* In/Out: version of the payload */
+ uint8_t payload[]; /* In/Out: Sub-cmd data buffer */
+};
+
+/* Helpers to evaluate the size of PAPR_SCM envelope */
+/* Calculate the papr_scm-header size */
+#define ND_PAPR_SCM_ENVELOPE_CONTENT_HDR_SIZE \
+ (sizeof(struct nd_papr_scm_cmd_pkg) - sizeof(struct nd_cmd_pkg))
+/*
+ * Given a type calculate the envelope size
+ * (nd-header + papr_scm-header + payload)
+ */
+#define ND_PAPR_SCM_ENVELOPE_SIZE(_type_) \
+ (sizeof(_type_) + sizeof(struct nd_papr_scm_cmd_pkg))
+
+/* Given a type envelope-content size (papr_scm-header + payload) */
+#define ND_PAPR_SCM_ENVELOPE_CONTENT_SIZE(_type_) \
+ (sizeof(_type_) + ND_PAPR_SCM_ENVELOPE_CONTENT_HDR_SIZE)
+
+/*
+ * Struct exchanged between kernel & ndctl in for PAPR_DSM_PAPR_SMART_HEALTH
+ * Various bitflags indicate the health status of the dimm.
+ */
+struct nd_papr_scm_dimm_health_stat_v1 {
+ /* Dimm not armed. So contents wont persist */
+ bool dimm_unarmed;
+ /* Previous shutdown did not persist contents */
+ bool dimm_bad_shutdown;
+ /* Contents from previous shutdown werent restored */
+ bool dimm_bad_restore;
+ /* Contents of the dimm have been scrubbed */
+ bool dimm_scrubbed;
+ /* Contents of the dimm cant be modified until CEC reboot */
+ bool dimm_locked;
+ /* Contents of dimm are encrypted */
+ bool dimm_encrypted;
+
+ enum dsm_papr_scm_dimm_health dimm_health;
+};
+
+/*
+ * Typedef the current struct for dimm_health so that any application
+ * or kernel recompiled after introducing a new version autometically
+ * supports the new version.
+ */
+#define nd_papr_scm_dimm_health_stat nd_papr_scm_dimm_health_stat_v1
+
+/* Current version number for the dimm health struct */
+#define ND_PAPR_SCM_DIMM_HEALTH_VERSION 1
+
+/* Struct holding a single performance metric */
+struct nd_papr_scm_perf_stat {
+ u64 statistic_id;
+ u64 statistic_value;
+};
+
+/* Struct exchanged between kernel and ndctl reporting drc perf stats */
+struct nd_papr_scm_perf_stats_v1 {
+ /* Number of stats following */
+ u32 num_statistics;
+
+ /* zero or more performance matrics */
+ struct nd_papr_scm_perf_stat scm_statistics[];
+};
+
+/*
+ * Typedef the current struct for dimm_stats so that any application
+ * or kernel recompiled after introducing a new version autometically
+ * supports the new version.
+ */
+#define nd_papr_scm_perf_stats nd_papr_scm_perf_stats_v1
+#define ND_PAPR_SCM_DIMM_PERF_STATS_VERSION 1
+
+/* Convert a libnvdimm nd_cmd_pkg to papr_scm specific pkg */
+static struct nd_papr_scm_cmd_pkg *nd_to_papr_cmd_pkg(struct nd_cmd_pkg *cmd)
+{
+ return (struct nd_papr_scm_cmd_pkg *) cmd;
+}
+
+/* Return the payload pointer for a given pcmd */
+static void *papr_scm_pcmd_to_payload(struct nd_papr_scm_cmd_pkg *pcmd)
+{
+ if (pcmd->hdr.nd_size_in == 0 && pcmd->hdr.nd_size_out == 0)
+ return NULL;
+ else
+ return (void *)((u8 *) pcmd + pcmd->payload_offset);
+}
+#endif /* _UAPI_ASM_POWERPC_PAPR_SCM_DSM_H_ */
Pull the kernel definition of PAPR_SCM DSM command which is located in the kernel tree at Ref[1]. Also add an implementation of 'papr_scm_dimm_ops' in a new file named 'papr_scm.c'. For now only an implementation of 'dimm_ops.cmd_is_supported' is provided. References: [1]: arch/powerpc/include/uapi/asm/papr_scm_dsm.h Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com> --- ndctl/lib/Makefile.am | 1 + ndctl/lib/papr_scm.c | 34 ++++++++++ ndctl/lib/papr_scm_dsm.h | 143 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 178 insertions(+) create mode 100644 ndctl/lib/papr_scm.c create mode 100644 ndctl/lib/papr_scm_dsm.h