[dpdk-dev] [RFC v2 05/17] mempool/octeontx: implement callback to populate objects

[Andrew Rybchenko]

Custom callback is required to fullfil requirement to align
object virtual address to total object size.

Signed-off-by: Andrew Rybchenko <arybchenko at solarflare.com>
---
 drivers/mempool/octeontx/rte_mempool_octeontx.c | 28 +++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/drivers/mempool/octeontx/rte_mempool_octeontx.c b/drivers/mempool/octeontx/rte_mempool_octeontx.c
index 4ec5efe..6563e80 100644
--- a/drivers/mempool/octeontx/rte_mempool_octeontx.c
+++ b/drivers/mempool/octeontx/rte_mempool_octeontx.c
@@ -174,6 +174,33 @@ octeontx_fpavf_register_memory_area(const struct rte_mempool *mp,
 	return octeontx_fpavf_pool_set_range(pool_bar, len, vaddr, gpool);
 }
 
+static int
+octeontx_fpavf_populate(struct rte_mempool *mp, unsigned int max_objs,
+			void *vaddr, rte_iova_t iova, size_t len,
+			rte_mempool_populate_obj_cb_t *obj_cb)
+{
+	size_t total_elt_sz;
+	size_t off;
+
+	if (iova == RTE_BAD_IOVA)
+		return -EINVAL;
+
+	total_elt_sz = mp->header_size + mp->elt_size + mp->trailer_size;
+
+	/* align object start address to a multiple of total_elt_sz */
+	off = total_elt_sz - ((uintptr_t)vaddr % total_elt_sz);
+
+	if (len < off)
+		return -EINVAL;
+
+	vaddr = (char *)vaddr + off;
+	iova += off;
+	len -= off;
+
+	return rte_mempool_populate_one_by_one(mp, max_objs, vaddr, iova, len,
+					       obj_cb);
+}
+
 static struct rte_mempool_ops octeontx_fpavf_ops = {
 	.name = "octeontx_fpavf",
 	.alloc = octeontx_fpavf_alloc,
@@ -184,6 +211,7 @@ static struct rte_mempool_ops octeontx_fpavf_ops = {
 	.get_capabilities = octeontx_fpavf_get_capabilities,
 	.register_memory_area = octeontx_fpavf_register_memory_area,
 	.calc_mem_size = octeontx_fpavf_calc_mem_size,
+	.populate = octeontx_fpavf_populate,
 };
 
 MEMPOOL_REGISTER_OPS(octeontx_fpavf_ops);
-- 
2.7.4