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| author |   mikeb <mikeb@openbsd.org> | 2016-01-26 15:31:02 +0000 |
|---|---|---|
| committer | mikeb <mikeb@openbsd.org> | 2016-01-26 15:31:02 +0000 |
| commit | 0cd4087ecc53e095485343b042104da0875eb521 (patch) | |
| tree | 9f9245ac8d50523a62c61751938a981fec5279b2 | |
| parent | Make sure to use locked atomic operations even on the SP kernel (diff) | |
| download | wireguard-openbsd-0cd4087ecc53e095485343b042104da0875eb521.tar.xz wireguard-openbsd-0cd4087ecc53e095485343b042104da0875eb521.zip | |
Implement a rather conservative bus_dmamap_sync API
| -rw-r--r-- | sys/dev/pv/xen.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/sys/dev/pv/xen.c b/sys/dev/pv/xen.c index e78ba640f93..4c19687e5c6 100644 --- a/sys/dev/pv/xen.c +++ b/sys/dev/pv/xen.c @@ -1,4 +1,4 @@ -/* $OpenBSD: xen.c,v 1.36 2016/01/26 15:23:11 mikeb Exp $ */ +/* $OpenBSD: xen.c,v 1.37 2016/01/26 15:31:02 mikeb Exp $ */ /* * Copyright (c) 2015 Mike Belopuhov @@ -78,6 +78,8 @@ int xen_bus_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, int xen_bus_dmamap_load_mbuf(bus_dma_tag_t, bus_dmamap_t, struct mbuf *, int); void xen_bus_dmamap_unload(bus_dma_tag_t, bus_dmamap_t); +void xen_bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, + bus_size_t, int); int xs_attach(struct xen_softc *); @@ -98,7 +100,7 @@ struct bus_dma_tag xen_bus_dma_tag = { NULL, NULL, xen_bus_dmamap_unload, - _bus_dmamap_sync, + xen_bus_dmamap_sync, _bus_dmamem_alloc, NULL, _bus_dmamem_free, @@ -1091,6 +1093,15 @@ xen_bus_dmamap_unload(bus_dma_tag_t t, bus_dmamap_t map) _bus_dmamap_unload(t, map); } +void +xen_bus_dmamap_sync(bus_dma_tag_t t, bus_dmamap_t map, bus_addr_t addr, + bus_size_t size, int op) +{ + if ((op == (BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE)) || + (op == (BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE))) + virtio_membar_sync(); +} + static int xen_attach_print(void *aux, const char *name) { |