eventdev/crypto: fix multi-process

[ upstream commit 8f4ff7de39693dfd26336afea5e12e1a7d8fd9b0 ]

Secondary process is not able to call the crypto adapter
APIs stats get/reset as crypto adapter memzone memory
is not accessible by secondary process.

Added memzone lookup so that secondary process can call the
crypto adapter APIs(stats_get etc)

Fixes: 7901eac ("eventdev: add crypto adapter implementation")
Cc: stable@dpdk.org

Signed-off-by: Ganapati Kundapura <ganapati.kundapura@intel.com>
Acked-by: Abhinandan Gujjar <abhinandan.gujjar@intel.com>

lib/librte_eventdev/rte_event_crypto_adapter.c

@@ -29,6 +29,8 @@
  */
 #define CRYPTO_ENQ_FLUSH_THRESHOLD 1024
 
+#define ECA_ADAPTER_ARRAY "crypto_adapter_array"
+
 struct rte_event_crypto_adapter {
 	/* Event device identifier */
 	uint8_t eventdev_id;
@@ -117,17 +119,17 @@ eca_valid_id(uint8_t id)
 static int
 eca_init(void)
 {
-	const char *name = "crypto_adapter_array";
 	const struct rte_memzone *mz;
 	unsigned int sz;
 
 	sz = sizeof(*event_crypto_adapter) *
 	    RTE_EVENT_CRYPTO_ADAPTER_MAX_INSTANCE;
 	sz = RTE_ALIGN(sz, RTE_CACHE_LINE_SIZE);
 
-	mz = rte_memzone_lookup(name);
+	mz = rte_memzone_lookup(ECA_ADAPTER_ARRAY);
 	if (mz == NULL) {
-		mz = rte_memzone_reserve_aligned(name, sz, rte_socket_id(), 0,
+		mz = rte_memzone_reserve_aligned(ECA_ADAPTER_ARRAY, sz,
+						 rte_socket_id(), 0,
 						 RTE_CACHE_LINE_SIZE);
 		if (mz == NULL) {
 			RTE_EDEV_LOG_ERR("failed to reserve memzone err = %"
@@ -140,6 +142,22 @@ eca_init(void)
 	return 0;
 }
 
+static int
+eca_memzone_lookup(void)
+{
+	const struct rte_memzone *mz;
+
+	if (event_crypto_adapter == NULL) {
+		mz = rte_memzone_lookup(ECA_ADAPTER_ARRAY);
+		if (mz == NULL)
+			return -ENOMEM;
+
+		event_crypto_adapter = mz->addr;
+	}
+
+	return 0;
+}
+
 static inline struct rte_event_crypto_adapter *
 eca_id_to_adapter(uint8_t id)
 {
@@ -1037,6 +1055,9 @@ rte_event_crypto_adapter_stats_get(uint8_t id,
 	uint32_t i;
 	int ret;
 
+	if (eca_memzone_lookup())
+		return -ENOMEM;
+
 	EVENT_CRYPTO_ADAPTER_ID_VALID_OR_ERR_RET(id, -EINVAL);
 
 	adapter = eca_id_to_adapter(id);
@@ -1078,6 +1099,9 @@ rte_event_crypto_adapter_stats_reset(uint8_t id)
 	struct rte_eventdev *dev;
 	uint32_t i;
 
+	if (eca_memzone_lookup())
+		return -ENOMEM;
+
 	EVENT_CRYPTO_ADAPTER_ID_VALID_OR_ERR_RET(id, -EINVAL);
 
 	adapter = eca_id_to_adapter(id);