Crypto callbacks APIs are available in header files but when
the macro RTE_CRYPTO_CALLBACKS unset, test application need to
put #ifdef in its code.

The test application should be able to build and run, regardless
DPDK library is built with RTE_CRYPTO_CALLBACKS defined or not.

Added ENOTSUP from the beginning of the APIs implementation
if RTE_CRYPTO_CALLBACKS macro is unset/undefined.

Fixes: 1c3ffb95595e ("cryptodev: add enqueue and dequeue callbacks")
Fixes: 5523a75af539 ("test/crypto: add case for enqueue/dequeue callbacks")

Signed-off-by: Ganapati Kundapura <ganapati.kundap...@intel.com>

---
v4:
* replaced ifdef with ifndef in APIs implementation
* Removed TEST_SKIP macro
* checked for ENOTSUP for first usage only

v3:
* Added NOTSUP from the beginning of the APIs

diff --git a/app/test/test_cryptodev.c b/app/test/test_cryptodev.c
index 94438c5..6d57ea1 100644
--- a/app/test/test_cryptodev.c
+++ b/app/test/test_cryptodev.c
@@ -14794,6 +14794,12 @@ test_enq_callback_setup(void)
        /* Test with invalid crypto device */
        cb = rte_cryptodev_add_enq_callback(RTE_CRYPTO_MAX_DEVS,
                        qp_id, test_enq_callback, NULL);
+       if (rte_errno == ENOTSUP) {
+               RTE_LOG(ERR, USER1, "%s line %d: "
+                       "rte_cryptodev_add_enq_callback() "
+                       "Not supported, skipped\n", __func__, __LINE__);
+               return TEST_SKIPPED;
+       }
        TEST_ASSERT_NULL(cb, "Add callback on qp %u on "
                        "cryptodev %u did not fail",
                        qp_id, RTE_CRYPTO_MAX_DEVS);
@@ -14909,6 +14915,12 @@ test_deq_callback_setup(void)
        /* Test with invalid crypto device */
        cb = rte_cryptodev_add_deq_callback(RTE_CRYPTO_MAX_DEVS,
                        qp_id, test_deq_callback, NULL);
+       if (rte_errno == ENOTSUP) {
+               RTE_LOG(ERR, USER1, "%s line %d: "
+                       "rte_cryptodev_add_deq_callback() "
+                       "Not supported, skipped\n", __func__, __LINE__);
+               return TEST_SKIPPED;
+       }
        TEST_ASSERT_NULL(cb, "Add callback on qp %u on "
                        "cryptodev %u did not fail",
                        qp_id, RTE_CRYPTO_MAX_DEVS);
diff --git a/lib/cryptodev/rte_cryptodev.c b/lib/cryptodev/rte_cryptodev.c
index 886eb7a..682c9f4 100644
--- a/lib/cryptodev/rte_cryptodev.c
+++ b/lib/cryptodev/rte_cryptodev.c
@@ -1491,6 +1491,10 @@ rte_cryptodev_add_enq_callback(uint8_t dev_id,
                               rte_cryptodev_callback_fn cb_fn,
                               void *cb_arg)
 {
+#ifndef RTE_CRYPTO_CALLBACKS
+       rte_errno = ENOTSUP;
+       return NULL;
+#endif
        struct rte_cryptodev *dev;
        struct rte_cryptodev_cb_rcu *list;
        struct rte_cryptodev_cb *cb, *tail;
@@ -1556,6 +1560,9 @@ rte_cryptodev_remove_enq_callback(uint8_t dev_id,
                                  uint16_t qp_id,
                                  struct rte_cryptodev_cb *cb)
 {
+#ifndef RTE_CRYPTO_CALLBACKS
+       return -ENOTSUP;
+#endif
        struct rte_cryptodev *dev;
        RTE_ATOMIC(struct rte_cryptodev_cb *) *prev_cb;
        struct rte_cryptodev_cb *curr_cb;
@@ -1630,6 +1637,10 @@ rte_cryptodev_add_deq_callback(uint8_t dev_id,
                               rte_cryptodev_callback_fn cb_fn,
                               void *cb_arg)
 {
+#ifndef RTE_CRYPTO_CALLBACKS
+       rte_errno = ENOTSUP;
+       return NULL;
+#endif
        struct rte_cryptodev *dev;
        struct rte_cryptodev_cb_rcu *list;
        struct rte_cryptodev_cb *cb, *tail;
@@ -1696,6 +1707,9 @@ rte_cryptodev_remove_deq_callback(uint8_t dev_id,
                                  uint16_t qp_id,
                                  struct rte_cryptodev_cb *cb)
 {
+#ifndef RTE_CRYPTO_CALLBACKS
+       return -ENOTSUP;
+#endif
        struct rte_cryptodev *dev;
        RTE_ATOMIC(struct rte_cryptodev_cb *) *prev_cb;
        struct rte_cryptodev_cb *curr_cb;
-- 
2.6.4

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