diff options
| -rw-r--r-- | sys/dev/hyperv/vmbus/vmbus.c | 33 | ||||
| -rw-r--r-- | sys/dev/hyperv/vmbus/vmbus_var.h | 1 |
2 files changed, 34 insertions, 0 deletions
diff --git a/sys/dev/hyperv/vmbus/vmbus.c b/sys/dev/hyperv/vmbus/vmbus.c index e0f7bbc99ca7..ee412e643b4f 100644 --- a/sys/dev/hyperv/vmbus/vmbus.c +++ b/sys/dev/hyperv/vmbus/vmbus.c @@ -137,6 +137,7 @@ static void vmbus_intr_teardown(struct vmbus_softc *); static int vmbus_doattach(struct vmbus_softc *); static void vmbus_event_proc_dummy(struct vmbus_softc *, int); +static bus_dma_tag_t vmbus_get_dma_tag(device_t parent, device_t child); static struct vmbus_softc *vmbus_sc; SYSCTL_NODE(_hw, OID_AUTO, vmbus, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, @@ -183,6 +184,7 @@ static device_method_t vmbus_methods[] = { DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), DEVMETHOD(bus_get_cpus, bus_generic_get_cpus), + DEVMETHOD(bus_get_dma_tag, vmbus_get_dma_tag), /* pcib interface */ DEVMETHOD(pcib_alloc_msi, vmbus_alloc_msi), @@ -219,6 +221,13 @@ vmbus_get_softc(void) return vmbus_sc; } +static bus_dma_tag_t +vmbus_get_dma_tag(device_t dev, device_t child) +{ + struct vmbus_softc *sc = vmbus_get_softc(); + return (sc->dmat); +} + void vmbus_msghc_reset(struct vmbus_msghc *mh, size_t dsize) { @@ -1382,6 +1391,9 @@ vmbus_doattach(struct vmbus_softc *sc) struct sysctl_oid_list *child; struct sysctl_ctx_list *ctx; int ret; + device_t dev_res; + ACPI_HANDLE handle; + unsigned int coherent; if (sc->vmbus_flags & VMBUS_FLAG_ATTACHED) return (0); @@ -1402,6 +1414,27 @@ vmbus_doattach(struct vmbus_softc *sc) sizeof(struct vmbus_channel *) * VMBUS_CHAN_MAX, M_DEVBUF, M_WAITOK | M_ZERO); + /* Coherency attribute */ + dev_res = devclass_get_device(devclass_find("vmbus_res"), 0); + handle = acpi_get_handle(dev_res); + + if (ACPI_FAILURE(acpi_GetInteger(handle, "_CCA", &coherent))) + coherent = 0; + if (bootverbose) + device_printf(sc->vmbus_dev, "Bus is%s cache-coherent\n", + coherent ? "" : " not"); + + bus_dma_tag_create(bus_get_dma_tag(sc->vmbus_dev), + 1, 0, + BUS_SPACE_MAXADDR, + BUS_SPACE_MAXADDR, + NULL, NULL, + BUS_SPACE_MAXSIZE, + BUS_SPACE_UNRESTRICTED, + BUS_SPACE_MAXSIZE, + coherent ? BUS_DMA_COHERENT : 0, + NULL, NULL, + &sc->dmat); /* * Create context for "post message" Hypercalls */ diff --git a/sys/dev/hyperv/vmbus/vmbus_var.h b/sys/dev/hyperv/vmbus/vmbus_var.h index f6fc875deb32..023d27c52cea 100644 --- a/sys/dev/hyperv/vmbus/vmbus_var.h +++ b/sys/dev/hyperv/vmbus/vmbus_var.h @@ -129,6 +129,7 @@ struct vmbus_softc { void *icookie; int vector; #endif + bus_dma_tag_t dmat; }; #define VMBUS_FLAG_ATTACHED 0x0001 /* vmbus was attached */ |