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| author | andrew <andrew@FreeBSD.org> | 2016-05-13 15:15:54 +0000 |
|---|---|---|
| committer | andrew <andrew@FreeBSD.org> | 2016-05-13 15:15:54 +0000 |
| commit | b9c729f4dbb05640fa254f3994dd67d2978adf3d (patch) | |
| tree | 4c31cb11b03b21bf83ab1a0d8abc0672392352aa | |
| parent | 582dada9d8d49055af5ec2efe55ac12622964158 (diff) | |
| download | FreeBSD-src-b9c729f4dbb05640fa254f3994dd67d2978adf3d.zip FreeBSD-src-b9c729f4dbb05640fa254f3994dd67d2978adf3d.tar.gz | |
Add DMA sync operations around accessing the dwmmc descriptor ring. Even
with it maps as cache-coherent we still need to call bus_dmamap_sync.
Obtained from: ABT Systems Ltd
Sponsored by: The FreeBSD Foundation
| -rw-r--r-- | sys/dev/mmc/host/dwmmc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sys/dev/mmc/host/dwmmc.c b/sys/dev/mmc/host/dwmmc.c index f96eff6..fe08fe9 100644 --- a/sys/dev/mmc/host/dwmmc.c +++ b/sys/dev/mmc/host/dwmmc.c @@ -722,6 +722,9 @@ dma_done(struct dwmmc_softc *sc, struct mmc_command *cmd) bus_dmamap_sync(sc->buf_tag, sc->buf_map, BUS_DMASYNC_POSTREAD); + bus_dmamap_sync(sc->desc_tag, sc->desc_map, + BUS_DMASYNC_POSTWRITE); + bus_dmamap_unload(sc->buf_tag, sc->buf_map); return (0); @@ -766,6 +769,10 @@ dma_prepare(struct dwmmc_softc *sc, struct mmc_command *cmd) if (err != 0) panic("dmamap_load failed\n"); + /* Ensure the device can see the desc */ + bus_dmamap_sync(sc->desc_tag, sc->desc_map, + BUS_DMASYNC_PREWRITE); + if (data->flags & MMC_DATA_WRITE) bus_dmamap_sync(sc->buf_tag, sc->buf_map, BUS_DMASYNC_PREWRITE); |
