[PATCH v21 5/9] firmware: arm_rmm: Activate the RMM

[Suzuki K Poulose <suzuki.poulose@arm.com>]

From: Steven Price <steven.price@arm.com>

Activate the RMM after the basic configuration. This is a memory
transferring stateful operation.

Reviewed-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Gavin Shan <gshan@redhat.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Co-developed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
Changes since v17:
 * Inline RMM_ACTIVATE command and remove the definitions from arm-rmi-cmds.h
 * Use scope-based cleanup to free sro object
Changes since v16:
 * Split into a new patch
---
 drivers/firmware/arm_rmm/rmi.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/arm_rmm/rmi.c b/drivers/firmware/arm_rmm/rmi.c
index 7d4e04a5d7c0a..a09056a5d269f 100644
--- a/drivers/firmware/arm_rmm/rmi.c
+++ b/drivers/firmware/arm_rmm/rmi.c
@@ -850,7 +850,18 @@ static int __init arm64_init_rmi(void)
 	if (ret)
 		return ret;
 
-	return 0;
+	/* Activate the RMM */
+	struct rmi_sro_state *sro __free(kfree) = kmalloc_obj(*sro);
+	if (!sro)
+		return -ENOMEM;
+
+	ret = rmi_sro_memxfer_cmd(sro, GFP_KERNEL, SMC_RMI_RMM_ACTIVATE);
+	if (ret) {
+		pr_err("RMM activate failed (%d)\n", ret);
+		ret = ret < 0 ? ret : -ENXIO;
+	}
+
+	return ret;
 }
 
 /*
-- 
2.43.0