Hi,

In my tests ice works with 64 bit DMA transfers.

ok?

bluhm

Index: dev/pci/if_ice.c
===================================================================
RCS file: /data/mirror/openbsd/cvs/src/sys/dev/pci/if_ice.c,v
diff -u -p -r1.67 if_ice.c
--- dev/pci/if_ice.c	19 Feb 2026 10:15:36 -0000	1.67
+++ dev/pci/if_ice.c	24 Feb 2026 19:01:38 -0000
@@ -1315,13 +1315,13 @@ ice_alloc_dma_mem(struct ice_hw *hw, str
 
 	mem->tag = sc->sc_dmat;
 
-	err = bus_dmamap_create(mem->tag, size, 1, size, 0, BUS_DMA_NOWAIT,
-	    &mem->map);
+	err = bus_dmamap_create(mem->tag, size, 1, size, 0,
+	    BUS_DMA_NOWAIT | BUS_DMA_64BIT, &mem->map);
 	if (err)
 		goto fail;
 
 	err = bus_dmamem_alloc(mem->tag, size, 1, 0, &mem->seg, 1, &nsegs,
-	    BUS_DMA_NOWAIT | BUS_DMA_ZERO);
+	    BUS_DMA_NOWAIT | BUS_DMA_ZERO | BUS_DMA_64BIT);
 	if (err || nsegs != 1)
 		goto fail_1;