diff options
| -rw-r--r-- | sys/arm/arm/nexus.c | 25 | ||||
| -rw-r--r-- | sys/arm/arm/nexusvar.h | 36 |
2 files changed, 61 insertions, 0 deletions
diff --git a/sys/arm/arm/nexus.c b/sys/arm/arm/nexus.c index 879bc30..423e11f 100644 --- a/sys/arm/arm/nexus.c +++ b/sys/arm/arm/nexus.c @@ -62,6 +62,8 @@ __FBSDID("$FreeBSD$"); #include <machine/resource.h> #include <machine/intr.h> +#include <arm/arm/nexusvar.h> + #ifdef FDT #include <machine/fdt.h> #include <dev/ofw/ofw_bus_subr.h> @@ -87,6 +89,7 @@ static struct resource *nexus_alloc_resource(device_t, device_t, int, int *, static int nexus_activate_resource(device_t, device_t, int, int, struct resource *); static bus_space_tag_t nexus_get_bus_tag(device_t, device_t); +static bus_dma_tag_t nexus_get_dma_tag(device_t dev, device_t child); #ifdef INTRNG #ifdef SMP static int nexus_bind_intr(device_t, device_t, struct resource *, int); @@ -112,6 +115,13 @@ static int nexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, int icells, pcell_t *intr); #endif +/* + * Normally NULL (which results in defaults which are handled in + * busdma_machdep), platform init code can use nexus_set_dma_tag() to set this + * to a tag that will be inherited by all busses and devices on the platform. + */ +static bus_dma_tag_t nexus_dma_tag; + static device_method_t nexus_methods[] = { /* Device interface */ DEVMETHOD(device_probe, nexus_probe), @@ -127,6 +137,7 @@ static device_method_t nexus_methods[] = { DEVMETHOD(bus_setup_intr, nexus_setup_intr), DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), DEVMETHOD(bus_get_bus_tag, nexus_get_bus_tag), + DEVMETHOD(bus_get_dma_tag, nexus_get_dma_tag), #ifdef INTRNG DEVMETHOD(bus_describe_intr, nexus_describe_intr), #ifdef SMP @@ -275,6 +286,20 @@ nexus_get_bus_tag(device_t bus __unused, device_t child __unused) #endif } +static bus_dma_tag_t +nexus_get_dma_tag(device_t dev, device_t child) +{ + + return nexus_dma_tag; +} + +void +nexus_set_dma_tag(bus_dma_tag_t tag) +{ + + nexus_dma_tag = tag; +} + static int nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, enum intr_polarity pol) diff --git a/sys/arm/arm/nexusvar.h b/sys/arm/arm/nexusvar.h new file mode 100644 index 0000000..ec2c808 --- /dev/null +++ b/sys/arm/arm/nexusvar.h @@ -0,0 +1,36 @@ +/*- + * Copyright (c) 2017 Ian Lepore <ian@freebsd.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _ARM_ARM_NEXUSVAR_H_ +#define _ARM_ARM_NEXUSVAR_H_ + +/* Set a platform busdma tag to be inherited by all busses and devices. */ +void nexus_set_dma_tag(bus_dma_tag_t _tag); + +#endif + |
