Add remote proc API to allow IPC client to translate address from
local to device paradigm.
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@xxxxxx>
---
drivers/remoteproc/remoteproc_core.c | 24 ++++++++++++++++++++++++
include/linux/remoteproc.h | 4 ++++
2 files changed, 28 insertions(+)
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index f9d04e59081c..72fb97f28048 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1939,6 +1939,30 @@ int rproc_add(struct rproc *rproc)
}
EXPORT_SYMBOL(rproc_add);
+/**
+ * rproc_pa_to_da() - memory translation from local physical address to
+ * remote device address
+ * @rproc: the remote processor handle to register
+ * @pa: local physical address
+ * @da: remote device address
+ *
+ * Return the device address associated to the physical address
+ * The translation is delegated to the platform driver if the ops is
+ * implemented. By default this function returns the physical address.
+ *
+ * Returns 0 on success and an appropriate error code otherwise.
+ */
+int rproc_pa_to_da(struct rproc *rproc, phys_addr_t pa, u64 *da)
+{
+ if (!rproc->ops->pa_to_da) {
+ *da = pa;
+ return 0;
+ }
+
+ return rproc->ops->pa_to_da(rproc, pa, da);
+}
+EXPORT_SYMBOL(rproc_pa_to_da);
+
/**
* rproc_type_release() - release a remote processor instance
* @dev: the rproc's device
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index d7235f7356e2..7b8a6c3ef519 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -359,6 +359,7 @@ enum rsc_handling_status {
* @stop: power off the device
* @kick: kick a virtqueue (virtqueue id given as a parameter)
* @da_to_va: optional platform hook to perform address translations
+ * @pa_to_da: optional platform hook to perform address translations
* @parse_fw: parse firmware to extract information (e.g. resource table)
* @handle_rsc: optional platform hook to handle vendor resources. Should return
* RSC_HANDLED if resource was handled, RSC_IGNORED if not handled and a
@@ -375,6 +376,7 @@ struct rproc_ops {
int (*stop)(struct rproc *rproc);
void (*kick)(struct rproc *rproc, int vqid);
void * (*da_to_va)(struct rproc *rproc, u64 da, int len);
+ int (*pa_to_da)(struct rproc *rproc, phys_addr_t pa, u64 *da);
int (*parse_fw)(struct rproc *rproc, const struct firmware *fw);
int (*handle_rsc)(struct rproc *rproc, u32 rsc_type, void *rsc,
int offset, int avail);
@@ -618,6 +620,8 @@ struct rproc_mem_entry *
rproc_of_resm_mem_entry_init(struct device *dev, u32 of_resm_idx, int len,
u32 da, const char *name, ...);
+int rproc_pa_to_da(struct rproc *rproc, phys_addr_t pa, u64 *da);
+
int rproc_boot(struct rproc *rproc);
void rproc_shutdown(struct rproc *rproc);
void rproc_report_crash(struct rproc *rproc, enum rproc_crash_type type);
--
2.17.1
