nvme: Host-init telemetry log mcda field added

Maximum Created Data Area for Telemetry Host-Initiated Log creation
This will ignored by contorller when MCDAS bit is 0 from supported log

Signed-off-by: Steven Seungcheol Lee <[email protected]>

Author: sc108-lee

nvme-wrap.c

@@ -221,10 +221,11 @@ int nvme_cli_get_log_device_self_test(struct nvme_dev *dev,
 	return do_admin_op(get_log_device_self_test, dev, log);
 }
 
-int nvme_cli_get_log_create_telemetry_host(struct nvme_dev *dev,
+int nvme_cli_get_log_create_telemetry_host_mcda(struct nvme_dev *dev,
+					   enum nvme_telemetry_da mcda,
 					   struct nvme_telemetry_log *log)
 {
-	return do_admin_op(get_log_create_telemetry_host, dev, log);
+	return do_admin_op(get_log_create_telemetry_host_mcda, dev, mcda, log);
 }
 
 int nvme_cli_get_log_telemetry_host(struct nvme_dev *dev, __u64 offset,

nvme-wrap.h

@@ -75,7 +75,8 @@ int nvme_cli_get_log_cmd_effects(struct nvme_dev *dev, enum nvme_csi csi,
 				 struct nvme_cmd_effects_log *effects_log);
 int nvme_cli_get_log_device_self_test(struct nvme_dev *dev,
 				      struct nvme_self_test_log *log);
-int nvme_cli_get_log_create_telemetry_host(struct nvme_dev *dev,
+int nvme_cli_get_log_create_telemetry_host_mcda(struct nvme_dev *dev,
+					   enum nvme_telemetry_da mcda,
 					   struct nvme_telemetry_log *log);
 int nvme_cli_get_log_telemetry_host(struct nvme_dev *dev, __u64 offset,
 				    __u32 len, void *log);

nvme.c

@@ -655,31 +655,41 @@ static int parse_telemetry_da(struct nvme_dev *dev,
 
 {
 	_cleanup_free_ struct nvme_id_ctrl *id_ctrl = NULL;
-	size_t dalb = 0;
+	size_t dalb, da1lb = le16_to_cpu(telem->dalb1), da2lb = le16_to_cpu(telem->dalb2),
+		da3lb = le16_to_cpu(telem->dalb3), da4lb = le32_to_cpu(telem->dalb4);
+	bool data_area_4_support;
 
 	id_ctrl = nvme_alloc(sizeof(*id_ctrl));
 	if (!id_ctrl)
 		return -ENOMEM;
 
+	if (nvme_cli_identify_ctrl(dev, id_ctrl)) {
+		perror("identify-ctrl");
+		return -errno;
+	}
+
+	data_area_4_support = id_ctrl->lpa & 0x40;
+
 	switch (da) {
+	case NVME_TELEMETRY_DA_CTRL_DETERMINE:
+		if (data_area_4_support)
+			dalb = da4lb;
+		else
+			dalb = da3lb;
+		break;
 	case NVME_TELEMETRY_DA_1:
-		dalb = le16_to_cpu(telem->dalb1);
+		dalb = da1lb;
 		break;
 	case NVME_TELEMETRY_DA_2:
-		dalb = le16_to_cpu(telem->dalb2);
+		dalb = da2lb;
 		break;
 	case NVME_TELEMETRY_DA_3:
 		/* dalb3 >= dalb2 >= dalb1 */
-		dalb = le16_to_cpu(telem->dalb3);
+		dalb = da3lb;
 		break;
 	case NVME_TELEMETRY_DA_4:
-		if (nvme_cli_identify_ctrl(dev, id_ctrl)) {
-			perror("identify-ctrl");
-			return -errno;
-		}
-
-		if (id_ctrl->lpa & 0x40) {
-			dalb = le32_to_cpu(telem->dalb4);
+		if (data_area_4_support) {
+			dalb = da4lb;
 		} else {
 			nvme_show_error(
 			    "Data area 4 unsupported, bit 6 of Log Page Attributes not set");
@@ -757,7 +767,7 @@ static int __create_telemetry_log_host(struct nvme_dev *dev,
 	if (!log)
 		return -ENOMEM;
 
-	err = nvme_cli_get_log_create_telemetry_host(dev, log);
+	err = nvme_cli_get_log_create_telemetry_host_mcda(dev, da, log);
 	if (err) {
 		if (errno)
 			return -errno;
@@ -854,6 +864,8 @@ static int get_telemetry_log(int argc, char **argv, struct command *cmd,
 	const char *hgen = "Have the host tell the controller to generate the report";
 	const char *cgen = "Gather report generated by the controller.";
 	const char *dgen = "Pick which telemetry data area to report. Default is 3 to fetch areas 1-3. Valid options are 1, 2, 3, 4.";
+	const char *mcda = "Host-init Maximum Created Data Area. Valid options are 0 ~ 4 "
+		"If given, This option will override dgen. 0 : controller determines data area";
 
 	_cleanup_free_ struct nvme_telemetry_log *log = NULL;
 	_cleanup_nvme_dev_ struct nvme_dev *dev = NULL;
@@ -869,21 +881,24 @@ static int get_telemetry_log(int argc, char **argv, struct command *cmd,
 		bool	ctrl_init;
 		int	data_area;
 		bool	rae;
+		__u8	mcda;
 	};
 	struct config cfg = {
 		.file_name	= NULL,
 		.host_gen	= 1,
 		.ctrl_init	= false,
 		.data_area	= 3,
 		.rae		= false,
+		.mcda		= 0xff,
 	};
 
 	NVME_ARGS(opts,
 		  OPT_FILE("output-file",     'O', &cfg.file_name, fname),
 		  OPT_UINT("host-generate",   'g', &cfg.host_gen,  hgen),
 		  OPT_FLAG("controller-init", 'c', &cfg.ctrl_init, cgen),
 		  OPT_UINT("data-area",       'd', &cfg.data_area, dgen),
-		  OPT_FLAG("rae",             'r', &cfg.rae,       rae));
+		  OPT_FLAG("rae",             'r', &cfg.rae,       rae),
+		  OPT_BYTE("mcda",            'm', &cfg.mcda,      mcda));
 
 	err = parse_and_open(&dev, argc, argv, desc, opts);
 	if (err)
@@ -895,6 +910,15 @@ static int get_telemetry_log(int argc, char **argv, struct command *cmd,
 	}
 
 	cfg.host_gen = !!cfg.host_gen;
+
+	if (cfg.mcda != 0xff) {
+		if (cfg.ctrl_init || !cfg.host_gen) {
+			nvme_show_error("mcda allowed for Host-init Creation!");
+			return -EINVAL;
+		}
+		cfg.data_area = cfg.mcda;
+	}
+
 	output = open(cfg.file_name, O_WRONLY | O_CREAT | O_TRUNC, 0666);
 	if (output < 0) {
 		nvme_show_error("Failed to open output file %s: %s!",