From d53a5630daddcc9fb92e0985a62341b2368a6610 Mon Sep 17 00:00:00 2001
From: Arunpandian J <arun.j@samsung.com>
Date: Wed, 23 Aug 2023 14:21:54 +0530
Subject: [PATCH] plugins/ocp: Add DSSD Power state feature(FID: C7h)

Signed-off-by: Arunpandian J <arun.j@samsung.com>
---
 plugins/ocp/ocp-nvme.c | 97 ++++++++++++++++++++++++++++++++++++++++++
 plugins/ocp/ocp-nvme.h |  1 +
 2 files changed, 98 insertions(+)

diff --git a/plugins/ocp/ocp-nvme.c b/plugins/ocp/ocp-nvme.c
index edf75fc3..fdb6b504 100644
--- a/plugins/ocp/ocp-nvme.c
+++ b/plugins/ocp/ocp-nvme.c
@@ -1863,6 +1863,103 @@ static int ocp_device_capabilities_log(int argc, char **argv, struct command *cm
 	return ret;
 }
 
+///////////////////////////////////////////////////////////////////////////////
+///////////////////////////////////////////////////////////////////////////////
+///////////////////////////////////////////////////////////////////////////////
+///////////////////////////////////////////////////////////////////////////////
+/// DSSD Power State (Feature Identifier C7h) Set Feature
+
+static int set_dssd_power_state(struct nvme_dev *dev, const __u32 nsid,
+				const __u8 fid, __u8 power_state, bool save,
+				bool uuid)
+{
+	__u32 result;
+	int err;
+	int uuid_index = 0;
+
+	if (uuid) {
+		/* OCP 2.0 requires UUID index support */
+		err = ocp_get_uuid_index(dev, &uuid_index);
+		if (err || !uuid_index) {
+			nvme_show_error("ERROR: No OCP UUID index found");
+			return err;
+		}
+	}
+
+	struct nvme_set_features_args args = {
+		.args_size = sizeof(args),
+		.fd = dev_fd(dev),
+		.fid = fid,
+		.nsid = nsid,
+		.cdw11 = power_state,
+		.cdw12 = 0,
+		.save = save,
+		.uuidx = uuid_index,
+		.cdw15 = 0,
+		.data_len = 0,
+		.data = NULL,
+		.timeout = NVME_DEFAULT_IOCTL_TIMEOUT,
+		.result = &result,
+	};
+
+	err = nvme_set_features(&args);
+	if (err > 0) {
+		nvme_show_status(err);
+	} else if (err < 0) {
+		nvme_show_perror("Define DSSD Power State");
+		fprintf(stderr, "Command failed while parsing.\n");
+	} else {
+		printf("Successfully set DSSD Power State (feature: 0xC7) to below values\n");
+		printf("DSSD Power State: 0x%x\n", power_state);
+		printf("Save bit Value: 0x%x\n", save);
+	}
+
+	return err;
+}
+
+static int set_dssd_power_state_feature(int argc, char **argv, struct command *cmd,
+										struct plugin *plugin)
+{
+	const char *desc = "Define DSSD Power State (Feature Identifier C7h) Set Feature.";
+	const char *power_state = "DSSD Power State to set in watts";
+	const char *save = "Specifies that the controller shall save the attribute";
+	const __u32 nsid = 0;
+	const __u8 fid = 0xC7;
+	struct nvme_dev *dev;
+	int err;
+
+	struct config {
+		__u8 power_state;
+		bool save;
+	};
+
+	struct config cfg = {
+		.power_state = 0,
+		.save = false,
+	};
+
+	OPT_ARGS(opts) = {
+		OPT_BYTE("power-state", 'p', &cfg.power_state, power_state),
+		OPT_FLAG("save", 's', &cfg.save, save),
+		OPT_FLAG("no-uuid", 'n', NULL,
+			 "Skip UUID index search (UUID index not required for OCP 1.0)"),
+		OPT_END()
+	};
+
+	err = parse_and_open(&dev, argc, argv, desc, opts);
+	if (err)
+		return err;
+
+	if (argconfig_parse_seen(opts, "power state"))
+		err = set_dssd_power_state(dev, nsid, fid, cfg.power_state,
+					       cfg.save,
+					       !argconfig_parse_seen(opts, "no-uuid"));
+
+	dev_close(dev);
+
+	return err;
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////////////
diff --git a/plugins/ocp/ocp-nvme.h b/plugins/ocp/ocp-nvme.h
index 74dd0ef7..18522945 100644
--- a/plugins/ocp/ocp-nvme.h
+++ b/plugins/ocp/ocp-nvme.h
@@ -26,6 +26,7 @@ PLUGIN(NAME("ocp", "OCP cloud SSD extensions", NVME_VERSION),
 		ENTRY("unsupported-reqs-log", "Get Unsupported Requirements Log Page", ocp_unsupported_requirements_log)
 		ENTRY("error-recovery-log", "Retrieve Error Recovery Log Page", ocp_error_recovery_log)
 		ENTRY("device-capability-log", "Get Device capabilities Requirements Log Page", ocp_device_capabilities_log)
+		ENTRY("set-dssd-power-state-feature", "Get Device capabilities Requirements Log Page", set_dssd_power_state_feature)
 	)
 );
 
-- 
2.49.0