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Subject[RFC PATCH 4/7] remoteproc: create the REMOTEPROC_VIRTIO config
Date
Create the config to associate to the remoteproc virtio.

Notice that the REMOTEPROC_VIRTIO config can not set to m. the reason
is that it defines API that is used by the built-in remote proc core.
Functions such are rproc_add_virtio_dev can be called during the
Linux boot phase.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
---
drivers/remoteproc/Kconfig | 11 +++++++++-
drivers/remoteproc/Makefile | 2 +-
drivers/remoteproc/remoteproc_internal.h | 28 ++++++++++++++++++++++++
3 files changed, 39 insertions(+), 2 deletions(-)

diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index 9a6eedc3994a..f271552c0d84 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -6,7 +6,7 @@ config REMOTEPROC
depends on HAS_DMA
select CRC32
select FW_LOADER
- select VIRTIO
+ select REMOTEPROC_VIRTIO
select WANT_DEV_COREDUMP
help
Support for remote processors (such as DSP coprocessors). These
@@ -14,6 +14,15 @@ config REMOTEPROC

if REMOTEPROC

+config REMOTEPROC_VIRTIO
+ bool "Remoteproc virtio device "
+ select VIRTIO
+ help
+ Say y here to have a virtio device support for the remoteproc
+ communication.
+
+ It's safe to say N if you don't use the virtio for the IPC.
+
config REMOTEPROC_CDEV
bool "Remoteproc character device interface"
help
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index bb26c9e4ef9c..73d2384a76aa 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -8,8 +8,8 @@ remoteproc-y := remoteproc_core.o
remoteproc-y += remoteproc_coredump.o
remoteproc-y += remoteproc_debugfs.o
remoteproc-y += remoteproc_sysfs.o
-remoteproc-y += remoteproc_virtio.o
remoteproc-y += remoteproc_elf_loader.o
+obj-$(CONFIG_REMOTEPROC_VIRTIO) += remoteproc_virtio.o
obj-$(CONFIG_REMOTEPROC_CDEV) += remoteproc_cdev.o
obj-$(CONFIG_IMX_REMOTEPROC) += imx_rproc.o
obj-$(CONFIG_INGENIC_VPU_RPROC) += ingenic_rproc.o
diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
index 152fe2e8668a..4ce012c353c0 100644
--- a/drivers/remoteproc/remoteproc_internal.h
+++ b/drivers/remoteproc/remoteproc_internal.h
@@ -30,10 +30,38 @@ int rproc_of_parse_firmware(struct device *dev, int index,
const char **fw_name);

/* from remoteproc_virtio.c */
+#if IS_ENABLED(CONFIG_REMOTEPROC_VIRTIO)
+
int rproc_rvdev_add_device(struct rproc_vdev *rvdev);
irqreturn_t rproc_vq_interrupt(struct rproc *rproc, int vq_id);
void rproc_vdev_release(struct kref *ref);

+#else
+
+int rproc_rvdev_add_device(struct rproc_vdev *rvdev)
+{
+ /* This shouldn't be possible */
+ WARN_ON(1);
+
+ return -ENXIO;
+}
+
+static inline irqreturn_t rproc_vq_interrupt(struct rproc *rproc, int vq_id)
+{
+ /* This shouldn't be possible */
+ WARN_ON(1);
+
+ return IRQ_NONE;
+}
+
+static inline void rproc_vdev_release(struct kref *ref)
+{
+ /* This shouldn't be possible */
+ WARN_ON(1);
+}
+
+#endif
+
/* from remoteproc_debugfs.c */
void rproc_remove_trace_file(struct dentry *tfile);
struct dentry *rproc_create_trace_file(const char *name, struct rproc *rproc,
--
2.17.1
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