[dpdk-dev] [RFC v2 03/17] mempool/octeontx: add callback to calculate memory size

[Andrew Rybchenko]

The driver requires one and only one physically contiguous
memory chunk for all objects.

Signed-off-by: Andrew Rybchenko <arybchenko at solarflare.com>
---
 drivers/mempool/octeontx/rte_mempool_octeontx.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/mempool/octeontx/rte_mempool_octeontx.c b/drivers/mempool/octeontx/rte_mempool_octeontx.c
index d143d05..4ec5efe 100644
--- a/drivers/mempool/octeontx/rte_mempool_octeontx.c
+++ b/drivers/mempool/octeontx/rte_mempool_octeontx.c
@@ -136,6 +136,30 @@ octeontx_fpavf_get_capabilities(const struct rte_mempool *mp,
 	return 0;
 }
 
+static ssize_t
+octeontx_fpavf_calc_mem_size(const struct rte_mempool *mp,
+			     uint32_t obj_num, uint32_t pg_shift,
+			     size_t *min_chunk_size, size_t *align)
+{
+	ssize_t mem_size;
+
+	/*
+	 * Simply need space for one more object to be able to
+	 * fullfil alignment requirements.
+	 */
+	mem_size = rte_mempool_calc_mem_size_def(mp, obj_num + 1, pg_shift,
+						 min_chunk_size, align);
+	if (mem_size >= 0) {
+		/*
+		 * The whole memory area containing the objects must be
+		 * physically contiguous.
+		 */
+		*min_chunk_size = mem_size;
+	}
+
+	return mem_size;
+}
+
 static int
 octeontx_fpavf_register_memory_area(const struct rte_mempool *mp,
 				    char *vaddr, rte_iova_t paddr, size_t len)
@@ -159,6 +183,7 @@ static struct rte_mempool_ops octeontx_fpavf_ops = {
 	.get_count = octeontx_fpavf_get_count,
 	.get_capabilities = octeontx_fpavf_get_capabilities,
 	.register_memory_area = octeontx_fpavf_register_memory_area,
+	.calc_mem_size = octeontx_fpavf_calc_mem_size,
 };
 
 MEMPOOL_REGISTER_OPS(octeontx_fpavf_ops);
-- 
2.7.4