doc/jsonrpc: Add start_subsystem_init and set_nvmf_target_config/options

Change-Id: Idf25cd3113f232f0bd05768d679092cfe945b9b2
Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-on: https://review.gerrithub.io/415131
Reviewed-by: Pawel Wodkowski <pawelx.wodkowski@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>

doc/jsonrpc.md

@@ -77,13 +77,46 @@ Example response:
 }
 ~~~
 
+## start_subsystem_init {#rpc_start_subsystem_init}
+
+Start initialization of SPDK subsystems when it is deferred by starting SPDK application with option -w.
+During its deferral some RPCs can be used to set global parameters for SPDK subsystems.
+This RPC can be called only once.
+
+### Parameters
+
+This method has no parameters.
+
+### Response
+
+Completion status of SPDK subsystem initialization is returned as a boolean.
+
+### Example
+
+Example request:
+~~~
+{
+  "jsonrpc": "2.0",
+  "id": 1,
+  "method": "start_subsystem_init"
+}
+~~~
+
+Example response:
+~~~
+{
+  "jsonrpc": "2.0",
+  "id": 1,
+  "result": true
+}
+~~~
 
 # Block Device Abstraction Layer {#jsonrpc_components_bdev}
 
 ## set_bdev_options {#rpc_set_bdev_options}
 
 Set global parameters for the block device (bdev) subsystem.  This RPC may only be called
-before subsystems have been initialized.
+before SPDK subsystems have been initialized.
 
 ### Parameters
 
@@ -690,3 +723,81 @@ Example response:
   "result": true
 }
 ~~~
+
+## set_nvmf_target_options {#rpc_set_nvmf_target_options}
+
+Set global parameters for the NVMe-oF target.  This RPC may only be called before SPDK subsystems
+have been initialized.
+
+### Parameters
+
+Name                    | Optional | Type        | Description
+----------------------- | -------- | ----------- | -----------
+max_queue_depth         | Optional | number      | Maximum number of outstanding I/Os per queue
+max_qpairs_per_ctrlr    | Optional | number      | Maximum number of SQ and CQ per controller
+in_capsule_data_size    | Optional | number      | Maximum number of in-capsule data size
+max_io_size             | Optional | number      | Maximum I/O size (bytes)
+max_subsystems          | Optional | number      | Maximum number of NVMe-oF subsystems
+io_unit_size            | Optional | number      | I/O unit size (bytes)
+
+### Example
+
+Example request:
+~~~
+{
+  "jsonrpc": "2.0",
+  "id": 1,
+  "method": "set_nvmf_target_options",
+  "params": {
+    "in_capsule_data_size": 4096,
+    "io_unit_size": 131072,
+    "max_qpairs_per_ctrlr": 64,
+    "max_queue_depth": 128,
+    "max_io_size": 131072,
+    "max_subsystems": 1024
+  }
+}
+~~~
+
+Example response:
+~~~
+{
+  "jsonrpc": "2.0",
+  "id": 1,
+  "result": true
+}
+~~~
+
+## set_nvmf_target_config {#rpc_set_nvmf_target_config}
+
+Set global configuration of NVMe-oF target.  This RPC may only be called before SPDK subsystems
+have been initialized.
+
+### Parameters
+
+Name                    | Optional | Type        | Description
+----------------------- | -------- | ----------- | -----------
+acceptor_poll_rate      | Optional | number      | Polling interval of the acceptor for incoming connections (microseconds)
+
+### Example
+
+Example request:
+~~~
+{
+  "jsonrpc": "2.0",
+  "id": 1,
+  "method": "set_nvmf_target_config",
+  "params": {
+    "acceptor_poll_rate": 10000
+  }
+}
+~~~
+
+Example response:
+~~~
+{
+  "jsonrpc": "2.0",
+  "id": 1,
+  "result": true
+}
+~~~

scripts/rpc.py

@@ -1009,9 +1009,9 @@ if __name__ == "__main__":
     p.add_argument('-q', '--max-queue-depth', help='Max number of outstanding I/O per queue', type=int)
     p.add_argument('-p', '--max-qpairs-per-ctrlr', help='Max number of SQ and CQ per controller', type=int)
     p.add_argument('-c', '--in-capsule-data-size', help='Max number of in-capsule data size', type=int)
-    p.add_argument('-i', '--max-io-size', help='Max I/O size', type=int)
+    p.add_argument('-i', '--max-io-size', help='Max I/O size (bytes)', type=int)
     p.add_argument('-x', '--max-subsystems', help='Max number of NVMf subsystems', type=int)
-    p.add_argument('-u', '--io-unit-size', help='I/O unit size', type=int)
+    p.add_argument('-u', '--io-unit-size', help='I/O unit size (bytes)', type=int)
     p.set_defaults(func=set_nvmf_target_options)
 
     @call_cmd
@@ -1020,7 +1020,7 @@ if __name__ == "__main__":
                                         acceptor_poll_rate=args.acceptor_poll_rate)
 
     p = subparsers.add_parser('set_nvmf_target_config', help='Set NVMf target config')
-    p.add_argument('-r', '--acceptor-poll-rate', help='How often the acceptor polls for incoming connections', type=int)
+    p.add_argument('-r', '--acceptor-poll-rate', help='Polling interval of the acceptor for incoming connections (usec)', type=int)
     p.set_defaults(func=set_nvmf_target_config)
 
     @call_cmd