| Message ID | 20180302145531.20463-2-srinivas.kandagatla@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | drivers: rpmsg: make rpmsg bus DMA capable | expand |
On 02/03/18 14:55, srinivas.kandagatla@linaro.org wrote: > From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> > > Export rpmsg bus type so that iommu drivers iommu ops to > rpmsg bus type. > > On Qualcomm SoCs ADSP exposes functions like audio and > other which need iommu access, as these drivers are part > of rpmsg bus, able to allocate memory from iommus is basic > requirement. So expose this bus so that iommu drivers can > add ops to this. IOMMU drivers are built-in while rpmsg can be built as a module, so that isn't always going to work. Robin. > Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> > --- > drivers/rpmsg/rpmsg_core.c | 3 ++- > include/linux/rpmsg.h | 2 +- > 2 files changed, 3 insertions(+), 2 deletions(-) > > diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c > index 5a081762afcc..e84c71f8d6ab 100644 > --- a/drivers/rpmsg/rpmsg_core.c > +++ b/drivers/rpmsg/rpmsg_core.c > @@ -465,7 +465,7 @@ static int rpmsg_dev_remove(struct device *dev) > return err; > } > > -static struct bus_type rpmsg_bus = { > +struct bus_type rpmsg_bus = { > .name = "rpmsg", > .match = rpmsg_dev_match, > .dev_groups = rpmsg_dev_groups, > @@ -473,6 +473,7 @@ static struct bus_type rpmsg_bus = { > .probe = rpmsg_dev_probe, > .remove = rpmsg_dev_remove, > }; > +EXPORT_SYMBOL(rpmsg_bus); > > int rpmsg_register_device(struct rpmsg_device *rpdev) > { > diff --git a/include/linux/rpmsg.h b/include/linux/rpmsg.h > index ca07366c4c33..869e5946b7df 100644 > --- a/include/linux/rpmsg.h > +++ b/include/linux/rpmsg.h > @@ -49,7 +49,7 @@ struct rpmsg_device; > struct rpmsg_endpoint; > struct rpmsg_device_ops; > struct rpmsg_endpoint_ops; > - > +extern struct bus_type rpmsg_bus; > /** > * struct rpmsg_channel_info - channel info representation > * @name: name of service >
diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c index 5a081762afcc..e84c71f8d6ab 100644 --- a/drivers/rpmsg/rpmsg_core.c +++ b/drivers/rpmsg/rpmsg_core.c @@ -465,7 +465,7 @@ static int rpmsg_dev_remove(struct device *dev) return err; } -static struct bus_type rpmsg_bus = { +struct bus_type rpmsg_bus = { .name = "rpmsg", .match = rpmsg_dev_match, .dev_groups = rpmsg_dev_groups, @@ -473,6 +473,7 @@ static struct bus_type rpmsg_bus = { .probe = rpmsg_dev_probe, .remove = rpmsg_dev_remove, }; +EXPORT_SYMBOL(rpmsg_bus); int rpmsg_register_device(struct rpmsg_device *rpdev) { diff --git a/include/linux/rpmsg.h b/include/linux/rpmsg.h index ca07366c4c33..869e5946b7df 100644 --- a/include/linux/rpmsg.h +++ b/include/linux/rpmsg.h @@ -49,7 +49,7 @@ struct rpmsg_device; struct rpmsg_endpoint; struct rpmsg_device_ops; struct rpmsg_endpoint_ops; - +extern struct bus_type rpmsg_bus; /** * struct rpmsg_channel_info - channel info representation * @name: name of service