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 <santosh.shu...@caviumnetworks.com>
Signed-off-by: Jerin Jacob <jerin.ja...@caviumnetworks.com>
Acked-by: Olivier Matz <olivier.m...@6wind.com>
---
lib/librte_mempool/rte_mempool.c | 10 ++++++++++
lib/librte_mempool/rte_mempool.h | 6 ++++++
2 files changed, 16 insertions(+)
diff --git a/lib/librte_mempool/rte_mempool.c b/lib/librte_mempool/rte_mempool.c
index 92de39562..146e38675 100644
--- a/lib/librte_mempool/rte_mempool.c
+++ b/lib/librte_mempool/rte_mempool.c
@@ -369,6 +369,16 @@ 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 d251d4255..734392556 100644
--- a/lib/librte_mempool/rte_mempool.h
+++ b/lib/librte_mempool/rte_mempool.h
@@ -265,6 +265,12 @@ 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. */
+/**
+ * This capability flag is advertised by a mempool handler, if the whole
+ * memory area containing the objects must be physically contiguous.
+ * Note: This flag should not be passed by application.
+ */
+#define MEMPOOL_F_CAPA_PHYS_CONTIG 0x0040
/**
* @internal When debug is enabled, store some statistics.
--
2.14.1
