misc: fastrpc: Add reserved mem support

The reserved mem support is needed for CMA heap support, which will be
used by AUDIOPD.

Co-developed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20221125071405.148786-4-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index f2bda08..3d58096 100644 (file)
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -19,6 +19,7 @@
 #include <linux/slab.h>
 #include <linux/qcom_scm.h>
 #include <uapi/misc/fastrpc.h>
+#include <linux/of_reserved_mem.h>
 
 #define ADSP_DOMAIN_ID (0)
 #define MDSP_DOMAIN_ID (1)
@@ -2065,6 +2066,9 @@ static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev)
                return -EINVAL;
        }
 
+       if (of_reserved_mem_device_init_by_idx(rdev, rdev->of_node, 0))
+               dev_info(rdev, "no reserved DMA memory for FASTRPC\n");
+
        vmcount = of_property_read_variable_u32_array(rdev->of_node,
                                "qcom,vmids", &vmids[0], 0, FASTRPC_MAX_VMIDS);
        if (vmcount < 0)