From a0b6b01d0f89dd96c8533fe875a5be5fdeda50d4 Mon Sep 17 00:00:00 2001 From: yongari Date: Fri, 5 Nov 2010 18:19:54 +0000 Subject: Enable 64bit DMA addressing for RTL810xE/RTL8168/RTL8111 PCIe controllers. Some old PCI controllers may work with DAC but it was known to be buggy so 64bit DMA addressing is used only on PCIe controllers. --- sys/dev/re/if_re.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'sys/dev/re') diff --git a/sys/dev/re/if_re.c b/sys/dev/re/if_re.c index 8fd20b6..f774e71 100644 --- a/sys/dev/re/if_re.c +++ b/sys/dev/re/if_re.c @@ -934,6 +934,7 @@ re_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error) static int re_allocmem(device_t dev, struct rl_softc *sc) { + bus_addr_t lowaddr; bus_size_t rx_list_size, tx_list_size; int error; int i; @@ -947,10 +948,13 @@ re_allocmem(device_t dev, struct rl_softc *sc) * register should be set. However some RealTek chips are known * to be buggy on DAC handling, therefore disable DAC by limiting * DMA address space to 32bit. PCIe variants of RealTek chips - * may not have the limitation but I took safer path. + * may not have the limitation. */ + lowaddr = BUS_SPACE_MAXADDR; + if ((sc->rl_flags & RL_FLAG_PCIE) == 0) + lowaddr = BUS_SPACE_MAXADDR_32BIT; error = bus_dma_tag_create(bus_get_dma_tag(dev), 1, 0, - BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, + lowaddr, BUS_SPACE_MAXADDR, NULL, NULL, BUS_SPACE_MAXSIZE_32BIT, 0, BUS_SPACE_MAXSIZE_32BIT, 0, NULL, NULL, &sc->rl_parent_tag); if (error) { -- cgit v1.1