[dpdk-dev] [PATCH v3 11/13] enic: add an enic assert macro

[John Daley <johndale@cisco.com>]

Add an ASSERT macro for the enic driver which is enabled when the log
level is >= RTE_LOG_DEBUG. Assert that number of mbufs to return to
the pool in the Tx function is never greater than the max allowed.

Signed-off-by: John Daley <johndale@cisco.com>
---
 drivers/net/enic/enic.h      | 12 ++++++++++++
 drivers/net/enic/enic_rxtx.c |  1 +
 2 files changed, 13 insertions(+)

diff --git a/drivers/net/enic/enic.h b/drivers/net/enic/enic.h
index 4eb28ee..4b76e6d 100644
--- a/drivers/net/enic/enic.h
+++ b/drivers/net/enic/enic.h
@@ -187,6 +187,18 @@ enic_ring_incr(uint32_t n_descriptors, uint32_t idx)
 	return idx;
 }
 
+#if RTE_LOG_LEVEL >= RTE_LOG_DEBUG
+#define ENIC_ASSERT(cond)				\
+	do {								\
+		if (unlikely(!(cond))) {				\
+			rte_panic("line %d\tassert \"" #cond "\""	\
+					"failed\n", __LINE__);		\
+		}							\
+	} while (0)
+#else
+#define ENIC_ASSERT(cond) do {} while (0)
+#endif
+
 extern void enic_fdir_stats_get(struct enic *enic,
 	struct rte_eth_fdir_stats *stats);
 extern int enic_fdir_add_fltr(struct enic *enic,
diff --git a/drivers/net/enic/enic_rxtx.c b/drivers/net/enic/enic_rxtx.c
index a04ebd0..7527bce 100644
--- a/drivers/net/enic/enic_rxtx.c
+++ b/drivers/net/enic/enic_rxtx.c
@@ -343,6 +343,7 @@ static inline void enic_free_wq_bufs(struct vnic_wq *wq, u16 completed_index)
 		buf = &wq->bufs[tail_idx];
 		m = (struct rte_mbuf *)(buf->mb);
 		if (likely(m->pool == pool)) {
+			ENIC_ASSERT(nb_free < ENIC_MAX_WQ_DESCS);
 			free[nb_free++] = m;
 		} else {
 			rte_mempool_put_bulk(pool, (void *)free, nb_free);
-- 
2.7.0