[dpdk-dev] [PATCH 1/3] cryptodev: add new APIs to assist PMD initialisation

[Declan Doherty]

Adds new PMD assist functions which are bus independent for driver to
create and destroy new device instances.

Also includes function to parse parameters which can be passed to
driver on device initialisation.

Signed-off-by: Declan Doherty <declan.doherty at intel.com>
---
 lib/librte_cryptodev/rte_cryptodev.h           |   8 +-
 lib/librte_cryptodev/rte_cryptodev_pmd.c       | 169 +++++++++++++++++++++++++
 lib/librte_cryptodev/rte_cryptodev_pmd.h       |  88 +++++++++++++
 lib/librte_cryptodev/rte_cryptodev_version.map |   3 +
 4 files changed, 264 insertions(+), 4 deletions(-)

diff --git a/lib/librte_cryptodev/rte_cryptodev.h b/lib/librte_cryptodev/rte_cryptodev.h
index fd0e3f1..86257b0 100644
--- a/lib/librte_cryptodev/rte_cryptodev.h
+++ b/lib/librte_cryptodev/rte_cryptodev.h
@@ -60,10 +60,10 @@ extern const char **rte_cyptodev_names;
 		RTE_FMT("%s() line %u: " RTE_FMT_HEAD(__VA_ARGS__,) "\n", \
 			__func__, __LINE__, RTE_FMT_TAIL(__VA_ARGS__,)))
 
-#define CDEV_PMD_LOG_ERR(dev, ...) \
-	RTE_LOG(ERR, CRYPTODEV, \
-		RTE_FMT("[%s] %s() line %u: " RTE_FMT_HEAD(__VA_ARGS__,) "\n", \
-			dev, __func__, __LINE__, RTE_FMT_TAIL(__VA_ARGS__,)))
+#define CDEV_LOG_INFO(...) \
+	RTE_LOG(INFO, CRYPTODEV, \
+		RTE_FMT("%s() line %u: " RTE_FMT_HEAD(__VA_ARGS__,) "\n", \
+			__func__, __LINE__, RTE_FMT_TAIL(__VA_ARGS__,)))
 
 #ifdef RTE_LIBRTE_CRYPTODEV_DEBUG
 #define CDEV_LOG_DEBUG(...) \
diff --git a/lib/librte_cryptodev/rte_cryptodev_pmd.c b/lib/librte_cryptodev/rte_cryptodev_pmd.c
index a57faad..6cb4419 100644
--- a/lib/librte_cryptodev/rte_cryptodev_pmd.c
+++ b/lib/librte_cryptodev/rte_cryptodev_pmd.c
@@ -40,6 +40,175 @@
  * Parse name from argument
  */
 static int
+rte_cryptodev_pmd_parse_name_arg(const char *key __rte_unused,
+		const char *value, void *extra_args)
+{
+	struct rte_cryptodev_pmd_init_params *params = extra_args;
+
+	if (strlen(value) >= RTE_CRYPTODEV_NAME_MAX_LEN - 1) {
+		CDEV_LOG_ERR("Invalid name %s, should be less than "
+				"%u bytes", value,
+				RTE_CRYPTODEV_NAME_MAX_LEN - 1);
+		return -1;
+	}
+
+	strncpy(params->name, value, RTE_CRYPTODEV_NAME_MAX_LEN);
+
+	return 0;
+}
+
+/**
+ * Parse integer from argument
+ */
+static int
+rte_cryptodev_pmd_parse_integer_arg(const char *key __rte_unused,
+		const char *value, void *extra_args)
+{
+	int *i = extra_args;
+
+	*i = atoi(value);
+	if (*i < 0) {
+		CDEV_LOG_ERR("Argument has to be positive.");
+		return -1;
+	}
+
+	return 0;
+}
+
+int
+rte_cryptodev_pmd_parse_input_args(
+		struct rte_cryptodev_pmd_init_params *params,
+		const char *args)
+{
+	struct rte_kvargs *kvlist = NULL;
+	int ret = 0;
+
+	if (params == NULL)
+		return -EINVAL;
+
+	if (args) {
+		kvlist = rte_kvargs_parse(args,	cryptodev_pmd_valid_params);
+		if (kvlist == NULL)
+			return -EINVAL;
+
+		ret = rte_kvargs_process(kvlist,
+				RTE_CRYPTODEV_PMD_MAX_NB_QP_ARG,
+				&rte_cryptodev_pmd_parse_integer_arg,
+				&params->max_nb_queue_pairs);
+		if (ret < 0)
+			goto free_kvlist;
+
+		ret = rte_kvargs_process(kvlist,
+				RTE_CRYPTODEV_PMD_MAX_NB_SESS_ARG,
+				&rte_cryptodev_pmd_parse_integer_arg,
+				&params->max_nb_sessions);
+		if (ret < 0)
+			goto free_kvlist;
+
+		ret = rte_kvargs_process(kvlist,
+				RTE_CRYPTODEV_PMD_SOCKET_ID_ARG,
+				&rte_cryptodev_pmd_parse_integer_arg,
+				&params->socket_id);
+		if (ret < 0)
+			goto free_kvlist;
+
+		ret = rte_kvargs_process(kvlist,
+				RTE_CRYPTODEV_PMD_NAME_ARG,
+				&rte_cryptodev_pmd_parse_name_arg,
+				params);
+		if (ret < 0)
+			goto free_kvlist;
+	}
+
+free_kvlist:
+	rte_kvargs_free(kvlist);
+	return ret;
+}
+
+struct rte_cryptodev *
+rte_cryptodev_pmd_create(const char *name,
+		struct rte_device *device,
+		struct rte_cryptodev_pmd_init_params *params)
+{
+	struct rte_cryptodev *cryptodev;
+
+	if (params->name[0] != '\0') {
+		CDEV_LOG_INFO("[%s] User specified device name = %s\n",
+				device->driver->name, params->name);
+		name = params->name;
+	}
+
+	CDEV_LOG_INFO("[%s] Creating cryptodev %s\n",
+			device->driver->name, name);
+
+	CDEV_LOG_INFO("[%s] Initialisation parameters [ name: %s, "
+			"private data size:  %zu, "
+			"socket id: %d,"
+			"max queue pairs: %u, "
+			"max sessions: %u ]\n",
+			device->driver->name, name, params->private_data_size,
+			params->socket_id, params->max_nb_queue_pairs,
+			params->max_nb_sessions);
+
+	/* allocate device structure */
+	cryptodev = rte_cryptodev_pmd_allocate(name, params->socket_id);
+	if (cryptodev == NULL) {
+		CDEV_LOG_ERR("[%s] Failed to allocate crypto device for %s",
+				device->driver->name, name);
+		return NULL;
+	}
+
+	/* allocate private device structure */
+	if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
+		cryptodev->data->dev_private =
+				rte_zmalloc_socket("cryptodev device private",
+						params->private_data_size,
+						RTE_CACHE_LINE_SIZE,
+						params->socket_id);
+
+		if (cryptodev->data->dev_private == NULL) {
+			CDEV_LOG_ERR("[%s] Cannot allocate memory for "
+					"cryptodev %s private data",
+					device->driver->name, name);
+
+			rte_cryptodev_pmd_release_device(cryptodev);
+			return NULL;
+		}
+	}
+
+	cryptodev->device = device;
+
+	/* initialise user call-back tail queue */
+	TAILQ_INIT(&(cryptodev->link_intr_cbs));
+
+	return cryptodev;
+}
+
+
+
+int
+rte_cryptodev_pmd_destroy(struct rte_cryptodev *cryptodev)
+{
+	CDEV_LOG_INFO("Closing crypto device %s [%s]", cryptodev->data->name,
+			cryptodev->device->name);
+
+	/* free crypto device */
+	rte_cryptodev_pmd_release_device(cryptodev);
+
+	if (rte_eal_process_type() == RTE_PROC_PRIMARY)
+		rte_free(cryptodev->data->dev_private);
+
+
+	cryptodev->device = NULL;
+	cryptodev->data = NULL;
+
+	return 0;
+}
+
+/**
+ * Parse name from argument
+ */
+static int
 rte_cryptodev_vdev_parse_name_arg(const char *key __rte_unused,
 		const char *value, void *extra_args)
 {
diff --git a/lib/librte_cryptodev/rte_cryptodev_pmd.h b/lib/librte_cryptodev/rte_cryptodev_pmd.h
index ba074e1..be9eb80 100644
--- a/lib/librte_cryptodev/rte_cryptodev_pmd.h
+++ b/lib/librte_cryptodev/rte_cryptodev_pmd.h
@@ -56,6 +56,35 @@ extern "C" {
 #include "rte_crypto.h"
 #include "rte_cryptodev.h"
 
+
+#define RTE_CRYPTODEV_PMD_DEFAULT_MAX_NB_QUEUE_PAIRS	8
+#define RTE_CRYPTODEV_PMD_DEFAULT_MAX_NB_SESSIONS	2048
+
+#define RTE_CRYPTODEV_PMD_NAME_ARG			("name")
+#define RTE_CRYPTODEV_PMD_MAX_NB_QP_ARG			("max_nb_queue_pairs")
+#define RTE_CRYPTODEV_PMD_MAX_NB_SESS_ARG		("max_nb_sessions")
+#define RTE_CRYPTODEV_PMD_SOCKET_ID_ARG			("socket_id")
+
+
+static const char * const cryptodev_pmd_valid_params[] = {
+	RTE_CRYPTODEV_PMD_NAME_ARG,
+	RTE_CRYPTODEV_PMD_MAX_NB_QP_ARG,
+	RTE_CRYPTODEV_PMD_MAX_NB_SESS_ARG,
+	RTE_CRYPTODEV_PMD_SOCKET_ID_ARG
+};
+
+/**
+ * @internal
+ * Initialisation parameters for crypto devices
+ */
+struct rte_cryptodev_pmd_init_params {
+	char name[RTE_CRYPTODEV_NAME_MAX_LEN];
+	size_t private_data_size;
+	int socket_id;
+	unsigned int max_nb_queue_pairs;
+	unsigned int max_nb_sessions;
+};
+
 /** Global structure used for maintaining state of allocated crypto devices */
 struct rte_cryptodev_global {
 	struct rte_cryptodev *devs;	/**< Device information array */
@@ -392,6 +421,65 @@ rte_cryptodev_pmd_allocate(const char *name, int socket_id);
 extern int
 rte_cryptodev_pmd_release_device(struct rte_cryptodev *cryptodev);
 
+
+/**
+ * @internal
+ *
+ * PMD assist function to parse initialisation arguments for crypto driver
+ * when creating a new crypto PMD device instance.
+ *
+ * PMD driver should set default values for that PMD before calling function,
+ * these default values will be over-written with successfully parsed values
+ * from args string.
+ *
+ * @param	params	parsed PMD initialisation parameters
+ * @param	args	input argument string to parse
+ *
+ * @return
+ *  - 0 on success
+ *  - errno on failure
+ */
+int
+rte_cryptodev_pmd_parse_input_args(
+		struct rte_cryptodev_pmd_init_params *params,
+		const char *args);
+
+/**
+ * @internal
+ *
+ * PMD assist function to provide boiler plate code for crypto driver to create
+ * and allocate resources for a new crypto PMD device instance.
+ *
+ * @param	name	crypto device name.
+ * @param	device	base device instance
+ * @param	params	PMD initialisation parameters
+ *
+ * @return
+ *  - crypto device instance on success
+ *  - NULL on creation failure
+ */
+struct rte_cryptodev *
+rte_cryptodev_pmd_create(const char *name,
+		struct rte_device *device,
+		struct rte_cryptodev_pmd_init_params *params);
+
+/**
+ * @internal
+ *
+ * PMD assist function to provide boiler plate code for crypto driver to
+ * destroy and free resources associated with a crypto PMD device instance.
+ *
+ * @param	name	crypto device name.
+ * @param	device	base device instance
+ * @param	params	PMD initialisation parameters
+ *
+ * @return
+ *  - crypto device instance on success
+ *  - NULL on creation failure
+ */
+int
+rte_cryptodev_pmd_destroy(struct rte_cryptodev *cryptodev);
+
 /**
  * Executes all the user application registered callbacks for the specific
  * device.
diff --git a/lib/librte_cryptodev/rte_cryptodev_version.map b/lib/librte_cryptodev/rte_cryptodev_version.map
index 919b6cc..a0ea7bf 100644
--- a/lib/librte_cryptodev/rte_cryptodev_version.map
+++ b/lib/librte_cryptodev/rte_cryptodev_version.map
@@ -84,5 +84,8 @@ DPDK_17.11 {
 	global:
 
 	rte_cryptodev_name_get;
+	rte_cryptodev_pmd_create;
+	rte_cryptodev_pmd_destroy;
+	rte_cryptodev_pmd_parse_input_args;
 
 } DPDK_17.08;
-- 
2.9.4