[v4] cryptodev: add telemetry callbacks

diff --git a/doc/guides/prog_guide/cryptodev_lib.rst b/doc/guides/prog_guide/cryptodev_lib.rst
index 9b1cf8d49f..25663e552e 100644
--- a/doc/guides/prog_guide/cryptodev_lib.rst
+++ b/doc/guides/prog_guide/cryptodev_lib.rst
@@ -1282,3 +1282,31 @@  Asymmetric Crypto Device API
 
 The cryptodev Library API is described in the
 `DPDK API Reference <https://doc.dpdk.org/api/>`_
+
+
+Device Statistics
+-----------------
+
+The Cryptodev library has support for displaying Crypto device information
+through the Telemetry interface. Telemetry commands that can be used
+are shown below.
+
+#. Get the list of available Crypto devices by ID::
+
+     --> /cryptodev/list
+     {"/cryptodev/list": [0, 1, 2, 3]}
+
+#. Get general information from a Crypto device::
+
+     --> /cryptodev/info,0
+     {"/cryptodev/info": {"device_name": "0000:1c:01.0_qat_sym",
+     "max_nb_queue_pairs": 2}}
+
+#. Get the statistics for a particular Crypto device::
+
+     --> /cryptodev/stats,0
+     {"/cryptodev/stats": {"enqueued_count": 0, "dequeued_count": 0,
+     "enqueue_err_count": 0, "dequeue_err_count": 0}}
+
+For more information on how to use the Telemetry interface, see
+the :doc:`../howto/telemetry`.
diff --git a/doc/guides/rel_notes/release_21_11.rst b/doc/guides/rel_notes/release_21_11.rst
index f643a61f44..f3242acb15 100644
--- a/doc/guides/rel_notes/release_21_11.rst
+++ b/doc/guides/rel_notes/release_21_11.rst
@@ -137,6 +137,11 @@  New Features
 
   Added support for more comprehensive CRC options.
 
+* **Added Telemetry callbacks to Cryptodev library.**
+
+  Added Telemetry callback functions which allow a list of Crypto devices,
+  stats for a Crypto device, and other device information to be queried.
+
 * **Added multi-process support for testpmd.**
 
   Added command-line options to specify total number of processes and
diff --git a/lib/cryptodev/rte_cryptodev.c b/lib/cryptodev/rte_cryptodev.c
index b913c434c5..52066a953b 100644
--- a/lib/cryptodev/rte_cryptodev.c
+++ b/lib/cryptodev/rte_cryptodev.c
@@ -35,6 +35,7 @@ 
 #include <rte_errno.h>
 #include <rte_spinlock.h>
 #include <rte_string_fns.h>
+#include <rte_telemetry.h>
 
 #include "rte_crypto.h"
 #include "rte_cryptodev.h"
@@ -2426,3 +2427,94 @@  rte_cryptodev_allocate_driver(struct cryptodev_driver *crypto_drv,
 
 	return nb_drivers++;
 }
+
+static int
+cryptodev_handle_dev_list(const char *cmd __rte_unused,
+		const char *params __rte_unused,
+		struct rte_tel_data *d)
+{
+	int dev_id;
+
+	if (rte_cryptodev_count() < 1)
+		return -1;
+
+	rte_tel_data_start_array(d, RTE_TEL_INT_VAL);
+	for (dev_id = 0; dev_id < RTE_CRYPTO_MAX_DEVS; dev_id++)
+		if (rte_cryptodev_is_valid_dev(dev_id))
+			rte_tel_data_add_array_int(d, dev_id);
+
+	return 0;
+}
+
+static int
+cryptodev_handle_dev_info(const char *cmd __rte_unused,
+		const char *params, struct rte_tel_data *d)
+{
+	struct rte_cryptodev_info cryptodev_info;
+	int dev_id;
+	char *end_param;
+
+	if (params == NULL || strlen(params) == 0 || !isdigit(*params))
+		return -EINVAL;
+
+	dev_id = strtoul(params, &end_param, 0);
+	if (*end_param != '\0')
+		CDEV_LOG_ERR("Extra parameters passed to command, ignoring");
+	if (!rte_cryptodev_is_valid_dev(dev_id))
+		return -EINVAL;
+
+	rte_cryptodev_info_get(dev_id, &cryptodev_info);
+
+	rte_tel_data_start_dict(d);
+	rte_tel_data_add_dict_string(d, "device_name",
+		cryptodev_info.device->name);
+	rte_tel_data_add_dict_int(d, "max_nb_queue_pairs",
+		cryptodev_info.max_nb_queue_pairs);
+
+	return 0;
+}
+
+#define ADD_DICT_STAT(s) rte_tel_data_add_dict_u64(d, #s, cryptodev_stats.s)
+
+static int
+cryptodev_handle_dev_stats(const char *cmd __rte_unused,
+		const char *params,
+		struct rte_tel_data *d)
+{
+	struct rte_cryptodev_stats cryptodev_stats;
+	int dev_id, ret;
+	char *end_param;
+
+	if (params == NULL || strlen(params) == 0 || !isdigit(*params))
+		return -EINVAL;
+
+	dev_id = strtoul(params, &end_param, 0);
+	if (*end_param != '\0')
+		CDEV_LOG_ERR("Extra parameters passed to command, ignoring");
+	if (!rte_cryptodev_is_valid_dev(dev_id))
+		return -EINVAL;
+
+	ret = rte_cryptodev_stats_get(dev_id, &cryptodev_stats);
+	if (ret < 0)
+		return ret;
+
+	rte_tel_data_start_dict(d);
+	ADD_DICT_STAT(enqueued_count);
+	ADD_DICT_STAT(dequeued_count);
+	ADD_DICT_STAT(enqueue_err_count);
+	ADD_DICT_STAT(dequeue_err_count);
+
+	return 0;
+}
+
+RTE_INIT(cryptodev_init_telemetry)
+{
+	rte_telemetry_register_cmd("/cryptodev/info", cryptodev_handle_dev_info,
+			"Returns information for a cryptodev. Parameters: int dev_id");
+	rte_telemetry_register_cmd("/cryptodev/list",
+			cryptodev_handle_dev_list,
+			"Returns list of available crypto devices by IDs. No parameters.");
+	rte_telemetry_register_cmd("/cryptodev/stats",
+			cryptodev_handle_dev_stats,
+			"Returns the stats for a cryptodev. Parameters: int dev_id");
+}