[dpdk-dev] [PATCH v2 08/13] app/testpmd: add show device command

[Gaetan Rivet <gaetan.rivet@6wind.com>]

A new interactive command is offered:

   show device <device description>

This commands lists all rte_device element matching the device
description. e.g.:

   show device bus=pci
   show device bus=vdev
   show device bus=vdev/class=eth
   show device bus=vdev,driver=net_ring/class=eth
   show device bus=vdev/class=eth,name=net_ring0

These devices may not be otherwise useful, some buses will spawn devices
to keep track of their assets without having a driver to use them.

Signed-off-by: Gaetan Rivet <gaetan.rivet@6wind.com>
Acked-by: Bernard Iremonger <bernard.iremonger@intel.com>
---
 app/test-pmd/cmdline.c                      | 54 +++++++++++++++++++++
 doc/guides/testpmd_app_ug/testpmd_funcs.rst | 24 +++++++++
 2 files changed, 78 insertions(+)

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index 0cbd340c1..a4846d9a8 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -228,6 +228,9 @@ static void cmd_help_long_parsed(void *parsed_result,
                         "show port tm node stats (port_id) (node_id) (clear)\n"
                         "       Display the port TM node stats.\n\n"
 
+			"show device (device_string)\n"
+			"       Display devices matching the device string.\n\n"
+
 		);
 	}
 
@@ -7115,6 +7118,56 @@ cmdline_parse_inst_t cmd_showportall = {
 	},
 };
 
+/* *** SHOW DEVICE INFO *** */
+struct cmd_showdevice_result {
+	cmdline_fixed_string_t show;
+	cmdline_fixed_string_t device;
+	cmdline_fixed_string_t filter;
+};
+
+static void
+cmd_showdevice_dump_device(const struct rte_device *dev)
+{
+	const struct rte_driver *drv = dev->driver;
+
+	printf("0x%p: %s:%s\n", (const void *)dev, dev->name,
+		drv ? drv->name : "<nil>");
+}
+
+static void cmd_showdevice_parsed(void *parsed_result,
+				__attribute__((unused)) struct cmdline *cl,
+				__attribute__((unused)) void *data)
+{
+	struct cmd_showdevice_result *res = parsed_result;
+	struct rte_dev_iterator it;
+	const struct rte_device *dev;
+
+	RTE_DEV_FOREACH(dev, res->filter, &it)
+		cmd_showdevice_dump_device(dev);
+}
+
+cmdline_parse_token_string_t cmd_showdevice_show =
+	TOKEN_STRING_INITIALIZER(struct cmd_showdevice_result,
+				show, "show");
+cmdline_parse_token_string_t cmd_showdevice_device =
+	TOKEN_STRING_INITIALIZER(struct cmd_showdevice_result,
+				device, "device");
+cmdline_parse_token_string_t cmd_showdevice_filter =
+	TOKEN_STRING_INITIALIZER(struct cmd_showdevice_result,
+			filter, NULL);
+
+cmdline_parse_inst_t cmd_showdevice = {
+	.f = cmd_showdevice_parsed,
+	.data = NULL,
+	.help_str = "show device <device string>",
+	.tokens = {
+		(void *)&cmd_showdevice_show,
+		(void *)&cmd_showdevice_device,
+		(void *)&cmd_showdevice_filter,
+		NULL,
+	},
+};
+
 /* *** SHOW PORT INFO *** */
 struct cmd_showport_result {
 	cmdline_fixed_string_t show;
@@ -17608,6 +17661,7 @@ cmdline_parse_ctx_t main_ctx[] = {
 	(cmdline_parse_inst_t *)&cmd_help_long,
 	(cmdline_parse_inst_t *)&cmd_quit,
 	(cmdline_parse_inst_t *)&cmd_load_from_file,
+	(cmdline_parse_inst_t *)&cmd_showdevice,
 	(cmdline_parse_inst_t *)&cmd_showport,
 	(cmdline_parse_inst_t *)&cmd_showqueue,
 	(cmdline_parse_inst_t *)&cmd_showportall,
diff --git a/doc/guides/testpmd_app_ug/testpmd_funcs.rst b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
index dde205a2b..417072cce 100644
--- a/doc/guides/testpmd_app_ug/testpmd_funcs.rst
+++ b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
@@ -2663,6 +2663,30 @@ set the traffic management default hierarchy on the port::
 
    testpmd> set port tm hierarchy default (port_id)
 
+Device functions
+----------------
+
+Show devices
+~~~~~~~~~~~~
+
+Display any registered devices::
+
+   testpmd> show device <device_string>
+
+where:
+
+* ``device_string``: Device description string, of the format
+
+  layer[/layer[/layer]]
+
+  where one layer is in the form
+
+  layer_key=layer_name[,key1=value1[,...]]
+
+  Valid layer keys are ``bus`` and ``class``.
+  Their respective values is defined by registered ``bus`` and ``class``
+  drivers.
+
 Filter Functions
 ----------------
 
-- 
2.18.0