Documentation: Add man page for mangoboost command

Documentation/cmd-plugins.txt

@@ -339,3 +339,6 @@ linknvme:nvme-sed-unlock[1]::
 
 linknvme:nvme-sed-password[1]::
 	Change the SED Opal Device password
+
+linknvme:nvme-mangoboost-id-ctrl[1]::
+	MangoBoost - NVMe Identify Controller

Documentation/meson.build

@@ -255,6 +255,7 @@ adoc_sources = [
   'nvme-sed-password',
   'nvme-sed-revert',
   'nvme-sed-unlock',
+  'nvme-mangoboost-id-ctrl',
 ]
 
 adoc_includes = [

Documentation/nvme-mangoboost-id-ctrl.txt

@@ -0,0 +1,120 @@
+nvme-mangoboost-id-ctrl(1)
+==========================
+
+NAME
+----
+nvme-mangoboost-id-ctrl - Send NVMe Identify Controller, return result and structure
+
+SYNOPSIS
+--------
+[verse]
+'nvme mangoboost id-ctrl' <device> [--vendor-specific | -V] [--raw-binary | -b]
+			[--output-format=<fmt> | -o <fmt>] [--verbose | -v]
+
+DESCRIPTION
+-----------
+For the NVMe device given, sends an identify controller command and
+provides the result and returned structure.
+
+The <device> parameter is mandatory and may be either the NVMe character
+device (ex: /dev/nvme0), or a namespace block device (ex: /dev/nvme0n1).
+
+On success, the structure may be returned in one of several ways depending
+on the option flags; the structure may be parsed by the program or the
+raw buffer may be printed to stdout.
+
+If having the program decode the output for readability, this version
+will decode MangoBoost vendor unique portions of the structure.
+
+OPTIONS
+-------
+-b::
+--raw-binary::
+	Print the raw buffer to stdout. Structure is not parsed by
+	program. This overrides the vendor specific and human readable options.
+
+-V::
+--vendor-specific::
+	In addition to parsing known fields, this option will dump
+	the vendor specific region of the structure in hex with ascii
+	interpretation.
+
+-H::
+--human-readable::
+	This option will parse and format many of the bit fields
+	into human-readable formats.
+
+-o <fmt>::
+--output-format=<fmt>::
+	Set the reporting format to 'normal', 'json' or 'binary'. Only one
+	output format can be used at a time.
+
+-v::
+--verbose::
+	Increase the information detail in the output.
+
+EXAMPLES
+--------
+* Has the program interpret the returned buffer and display the known
+fields in a human readable format:
++
+------------
+# nvme mangoboost id-ctrl /dev/nvme0
+------------
++
+
+* In addition to showing the known fields, has the program to display
+the vendor unique field:
++
+------------
+# nvme mangoboost id-ctrl /dev/nvme0 --vendor-specific
+# nvme mangoboost id-ctrl /dev/nvme0 -V
+------------
++
+The above will dump the 'vs' buffer in hex since it doesn't know how to
+interpret it.
+
+* Have the program return the raw structure in binary:
++
+------------
+# nvme mangoboost id-ctrl /dev/nvme0 --raw-binary > id_ctrl.raw
+# nvme mangoboost id-ctrl /dev/nvme0 -b > id_ctrl.raw
+------------
++
+It is probably a bad idea to not redirect stdout when using this mode.
+
+* Alternatively you may want to send the data to another program that
+can parse the raw buffer.
++
+------------
+# nvme mangoboost id-ctrl /dev/nvme0 --raw-binary | nvme_parse_id_ctrl
+------------
++
+The parse program in the above example can be a program that shows the
+structure in a way you like. The following program is such an example
+that will parse it and can accept the output through a pipe, `'|'`,
+as shown in the above example, or you can `'cat'` a saved output buffer to it.
+------------
+/* File: nvme_parse_id_ctrl.c */
+
+#include <linux/nvme.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int main(int argc, char **argv)
+{
+	unsigned char buf[sizeof(struct nvme_id_ctrl)];
+	struct nvme_id_ctrl *ctrl = (struct nvme_id_ctrl *)buf;
+
+	if (read(STDIN_FILENO, buf, sizeof(buf)))
+		return 1;
+
+	printf("vid   : %#x\n", ctrl->vid);
+	printf("ssvid : %#x\n", ctrl->ssvid);
+	return 0;
+}
+------------
+
+NVME
+----
+Part of the nvme-user suite