Index: head/sys/contrib/ena-com/ena_com.h
===================================================================
--- head/sys/contrib/ena-com/ena_com.h
+++ head/sys/contrib/ena-com/ena_com.h
@@ -51,6 +51,8 @@
 #define ADMIN_CQ_SIZE(depth)	((depth) * sizeof(struct ena_admin_acq_entry))
 #define ADMIN_AENQ_SIZE(depth)	((depth) * sizeof(struct ena_admin_aenq_entry))
 
+#define ENA_CDESC_RING_SIZE_ALIGNMENT	(1 << 12) /* 4K */
+
 /*****************************************************************************/
 /*****************************************************************************/
 /* ENA adaptive interrupt moderation settings */
Index: head/sys/contrib/ena-com/ena_com.c
===================================================================
--- head/sys/contrib/ena-com/ena_com.c
+++ head/sys/contrib/ena-com/ena_com.c
@@ -449,19 +449,21 @@
 	size = io_cq->cdesc_entry_size_in_bytes * io_cq->q_depth;
 	io_cq->bus = ena_dev->bus;
 
-	ENA_MEM_ALLOC_COHERENT_NODE(ena_dev->dmadev,
-			size,
-			io_cq->cdesc_addr.virt_addr,
-			io_cq->cdesc_addr.phys_addr,
-			io_cq->cdesc_addr.mem_handle,
-			ctx->numa_node,
-			prev_node);
+	ENA_MEM_ALLOC_COHERENT_NODE_ALIGNED(ena_dev->dmadev,
+					    size,
+					    io_cq->cdesc_addr.virt_addr,
+					    io_cq->cdesc_addr.phys_addr,
+					    io_cq->cdesc_addr.mem_handle,
+					    ctx->numa_node,
+					    prev_node,
+					    ENA_CDESC_RING_SIZE_ALIGNMENT);
 	if (!io_cq->cdesc_addr.virt_addr) {
-		ENA_MEM_ALLOC_COHERENT(ena_dev->dmadev,
-				       size,
-				       io_cq->cdesc_addr.virt_addr,
-				       io_cq->cdesc_addr.phys_addr,
-				       io_cq->cdesc_addr.mem_handle);
+		ENA_MEM_ALLOC_COHERENT_ALIGNED(ena_dev->dmadev,
+					       size,
+					       io_cq->cdesc_addr.virt_addr,
+					       io_cq->cdesc_addr.phys_addr,
+					       io_cq->cdesc_addr.mem_handle,
+					       ENA_CDESC_RING_SIZE_ALIGNMENT);
 	}
 
 	if (!io_cq->cdesc_addr.virt_addr) {
Index: head/sys/contrib/ena-com/ena_plat.h
===================================================================
--- head/sys/contrib/ena-com/ena_plat.h
+++ head/sys/contrib/ena-com/ena_plat.h
@@ -106,6 +106,8 @@
 #define ENA_ADMQ	(1 << 8) /* Detailed info about admin queue. 	      */
 #define ENA_NETMAP	(1 << 9) /* Detailed info about netmap. 	      */
 
+#define DEFAULT_ALLOC_ALIGNMENT	8
+
 extern int ena_log_level;
 
 #define ena_trace_raw(level, fmt, args...)			\
@@ -285,7 +287,7 @@
 void	ena_dmamap_callback(void *arg, bus_dma_segment_t *segs, int nseg,
     int error);
 int	ena_dma_alloc(device_t dmadev, bus_size_t size, ena_mem_handle_t *dma,
-    int mapflags);
+    int mapflags, bus_size_t alignment);
 
 static inline uint32_t
 ena_reg_read32(struct ena_bus *bus, bus_size_t offset)
@@ -313,19 +315,29 @@
 		(void)(size);						\
 		free(ptr, M_DEVBUF);					\
 	} while (0)
-#define ENA_MEM_ALLOC_COHERENT_NODE(dmadev, size, virt, phys, handle, node, \
-    dev_node)								\
+#define ENA_MEM_ALLOC_COHERENT_NODE_ALIGNED(dmadev, size, virt, phys,	\
+    handle, node, dev_node, alignment) 					\
 	do {								\
 		((virt) = NULL);					\
 		(void)(dev_node);					\
 	} while (0)
 
-#define ENA_MEM_ALLOC_COHERENT(dmadev, size, virt, phys, dma)		\
+#define ENA_MEM_ALLOC_COHERENT_NODE(dmadev, size, virt, phys, handle,	\
+    node, dev_node)							\
+	ENA_MEM_ALLOC_COHERENT_NODE_ALIGNED(dmadev, size, virt,		\
+	    phys, handle, node, dev_node, DEFAULT_ALLOC_ALIGNMENT)
+
+#define ENA_MEM_ALLOC_COHERENT_ALIGNED(dmadev, size, virt, phys, dma,	\
+    alignment)								\
 	do {								\
-		ena_dma_alloc((dmadev), (size), &(dma), 0);		\
+		ena_dma_alloc((dmadev), (size), &(dma), 0, alignment);	\
 		(virt) = (void *)(dma).vaddr;				\
 		(phys) = (dma).paddr;					\
 	} while (0)
+
+#define ENA_MEM_ALLOC_COHERENT(dmadev, size, virt, phys, dma)		\
+	ENA_MEM_ALLOC_COHERENT_ALIGNED(dmadev, size, virt,		\
+	    phys, dma, DEFAULT_ALLOC_ALIGNMENT)
 
 #define ENA_MEM_FREE_COHERENT(dmadev, size, virt, phys, dma)		\
 	do {								\
Index: head/sys/dev/ena/ena.c
===================================================================
--- head/sys/dev/ena/ena.c
+++ head/sys/dev/ena/ena.c
@@ -200,7 +200,7 @@
 
 int
 ena_dma_alloc(device_t dmadev, bus_size_t size,
-    ena_mem_handle_t *dma , int mapflags)
+    ena_mem_handle_t *dma, int mapflags, bus_size_t alignment)
 {
 	struct ena_adapter* adapter = device_get_softc(dmadev);
 	uint32_t maxsize;
@@ -214,7 +214,7 @@
 		dma_space_addr = BUS_SPACE_MAXADDR;
 
 	error = bus_dma_tag_create(bus_get_dma_tag(dmadev), /* parent */
-	    8, 0,	      /* alignment, bounds 		*/
+	    alignment, 0,     /* alignment, bounds 		*/
 	    dma_space_addr,   /* lowaddr of exclusion window	*/
 	    BUS_SPACE_MAXADDR,/* highaddr of exclusion window	*/
 	    NULL, NULL,	      /* filter, filterarg 		*/