The memory area containing all the objects must be physically
contiguous.
Introducing MEMPOOL_F_CAPA_PHYS_CONTIG flag for such use-case.

The flag useful to detect whether pool area has sufficient space
to fit all objects. If not then return -ENOSPC.
This way, we make sure that all object within a pool is contiguous.

Signed-off-by: Santosh Shukla <redacted>
Signed-off-by: Jerin Jacob <redacted>
---
 lib/librte_mempool/rte_mempool.c | 8 ++++++++
 lib/librte_mempool/rte_mempool.h | 1 +
 2 files changed, 9 insertions(+)

diff --git a/lib/librte_mempool/rte_mempool.c b/lib/librte_mempool/rte_mempool.c
index d518c53de..19e5e6ddf 100644
--- a/lib/librte_mempool/rte_mempool.c
+++ b/lib/librte_mempool/rte_mempool.c

@@ -370,6 +370,14 @@ rte_mempool_populate_phys(struct rte_mempool *mp, char *vaddr,
 
 	total_elt_sz = mp->header_size + mp->elt_size + mp->trailer_size;
 
+	/* Detect pool area has sufficient space for elements */
+	if (mp->flags & MEMPOOL_F_CAPA_PHYS_CONTIG) {
+		if (len < total_elt_sz * mp->size) {
+			RTE_LOG(ERR, MEMPOOL, "pool area %" PRIx64 " not enough\n", (uint64_t)len);
+			return -ENOSPC;
+		}
+	}
+
 	memhdr = rte_zmalloc("MEMPOOL_MEMHDR", sizeof(*memhdr), 0);
 	if (memhdr == NULL)
 		return -ENOMEM;

diff --git a/lib/librte_mempool/rte_mempool.h b/lib/librte_mempool/rte_mempool.h
index bc4a1dac7..a4bfdb56e 100644
--- a/lib/librte_mempool/rte_mempool.h
+++ b/lib/librte_mempool/rte_mempool.h

@@ -265,6 +265,7 @@ struct rte_mempool {
 #define MEMPOOL_F_SC_GET         0x0008 /**< Default get is "single-consumer".*/
 #define MEMPOOL_F_POOL_CREATED   0x0010 /**< Internal: pool is created. */
 #define MEMPOOL_F_NO_PHYS_CONTIG 0x0020 /**< Don't need physically contiguous objs. */
+#define MEMPOOL_F_CAPA_PHYS_CONTIG 0x0040 /**< Detect physcially contiguous objs */