@@ -245,10 +245,50 @@ static int omap_rproc_stop(struct rproc *rproc)
return 0;
}
+/**
+ * omap_rproc_da_to_va() - internal memory translation helper
+ * @rproc: remote processor to apply the address translation for
+ * @da: device address to translate
+ * @len: length of the memory buffer
+ *
+ * Custom function implementing the rproc .da_to_va ops to provide address
+ * translation (device address to kernel virtual address) for internal RAMs
+ * present in a DSP or IPU device). The translated addresses can be used
+ * either by the remoteproc core for loading, or by any rpmsg bus drivers.
+ *
+ * Return: translated virtual address in kernel memory space on success,
+ * or NULL on failure.
+ */
+static void *omap_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len)
+{
+ struct omap_rproc *oproc = rproc->priv;
+ int i;
+ u32 offset;
+
+ if (len == 0)
+ return NULL;
+
+ if (!oproc->num_mems)
+ return NULL;
+
+ for (i = 0; i < oproc->num_mems; i++) {
+ if (da >= oproc->mem[i].dev_addr && da + len <=
+ oproc->mem[i].dev_addr + oproc->mem[i].size) {
+ offset = da - oproc->mem[i].dev_addr;
+ /* __force to make sparse happy with type conversion */
+ return (__force void *)(oproc->mem[i].cpu_addr +
+ offset);
+ }
+ }
+
+ return NULL;
+}
+
static const struct rproc_ops omap_rproc_ops = {
.start = omap_rproc_start,
.stop = omap_rproc_stop,
.kick = omap_rproc_kick,
+ .da_to_va = omap_rproc_da_to_va,
};
static const struct omap_rproc_mem_data ipu_mems[] = {