[PATCH] crypto/scheduler: add get attached slaves API

[Fan Zhang <roy.fan.zhang@intel.com>]

This patch adds an API to get the run-time slaves number and list
of a cryptodev scheduler PMD.

Signed-off-by: Fan Zhang <roy.fan.zhang@intel.com>
---
 drivers/crypto/scheduler/rte_cryptodev_scheduler.c | 31 ++++++++++++++++++++++
 drivers/crypto/scheduler/rte_cryptodev_scheduler.h | 23 ++++++++++++++++
 .../scheduler/rte_pmd_crypto_scheduler_version.map |  7 +++++
 3 files changed, 61 insertions(+)

diff --git a/drivers/crypto/scheduler/rte_cryptodev_scheduler.c b/drivers/crypto/scheduler/rte_cryptodev_scheduler.c
index 11e8143..55c0ec4 100644
--- a/drivers/crypto/scheduler/rte_cryptodev_scheduler.c
+++ b/drivers/crypto/scheduler/rte_cryptodev_scheduler.c
@@ -469,3 +469,34 @@ rte_cryptodev_scheduler_load_user_scheduler(uint8_t scheduler_id,
 
 	return 0;
 }
+
+int
+rte_cryptodev_scheduler_slaves_get(uint8_t scheduler_id, uint8_t *slaves)
+{
+	struct rte_cryptodev *dev = rte_cryptodev_pmd_get_dev(scheduler_id);
+	struct scheduler_ctx *sched_ctx;
+	int nb_slaves = 0;
+
+	if (!dev) {
+		CS_LOG_ERR("Operation not supported");
+		return -ENOTSUP;
+	}
+
+	if (dev->dev_type != RTE_CRYPTODEV_SCHEDULER_PMD) {
+		CS_LOG_ERR("Operation not supported");
+		return -ENOTSUP;
+	}
+
+	sched_ctx = dev->data->dev_private;
+
+	nb_slaves = (int)sched_ctx->nb_slaves;
+
+	if (slaves) {
+		int i;
+
+		for (i = 0; i < nb_slaves; i++)
+			slaves[i] = sched_ctx->slaves[i].dev_id;
+	}
+
+	return 0;
+}
diff --git a/drivers/crypto/scheduler/rte_cryptodev_scheduler.h b/drivers/crypto/scheduler/rte_cryptodev_scheduler.h
index 7ef44e7..0e32895 100644
--- a/drivers/crypto/scheduler/rte_cryptodev_scheduler.h
+++ b/drivers/crypto/scheduler/rte_cryptodev_scheduler.h
@@ -40,6 +40,11 @@
 extern "C" {
 #endif
 
+/**< Maximum number of bonded devices per devices */
+#ifndef RTE_CRYPTODEV_SCHEDULER_MAX_NB_SLAVES
+#define RTE_CRYPTODEV_SCHEDULER_MAX_NB_SLAVES	(8)
+#endif
+
 /**
  * Crypto scheduler PMD operation modes
  */
@@ -143,6 +148,24 @@ rte_cryptodev_scheduler_ordering_set(uint8_t scheduler_id,
 int
 rte_cryptodev_scheduler_ordering_get(uint8_t scheduler_id);
 
+/**
+ * Get the the attached slaves' count and/or ID
+ *
+ *@param	scheduler_id	The target scheduler device ID
+ *		slaves		If successful, the slaves' device
+ *				IDs will be written. This parameter
+ *				can be NULL, but otherwise please NOTE
+ *				it should be an uint8_t array of at least
+ *				RTE_CRYPTODEV_SCHEDULER_MAX_NB_SLAVES
+ *				elements.
+ *
+ * @return
+ *	non-negative number: the number of slaves attached
+ *	negative integer if error occurs.
+ */
+int
+rte_cryptodev_scheduler_slaves_get(uint8_t scheduler_id, uint8_t *slaves);
+
 typedef uint16_t (*rte_cryptodev_scheduler_burst_enqueue_t)(void *qp_ctx,
 		struct rte_crypto_op **ops, uint16_t nb_ops);
 
diff --git a/drivers/crypto/scheduler/rte_pmd_crypto_scheduler_version.map b/drivers/crypto/scheduler/rte_pmd_crypto_scheduler_version.map
index a485b43..69cf0c6 100644
--- a/drivers/crypto/scheduler/rte_pmd_crypto_scheduler_version.map
+++ b/drivers/crypto/scheduler/rte_pmd_crypto_scheduler_version.map
@@ -10,3 +10,10 @@ DPDK_17.02 {
 	rte_cryptodev_scheduler_ordering_get;
 
 };
+
+DPDK_17.05 {
+	global:
+
+	rte_cryptodev_scheduler_slaves_get;
+
+} DPDK_17.02;
-- 
2.7.4