firmware: arm_ffa: Helper to check if a partition can receive REQUEST2 messages

Add a helper that allows FF-A drivers to check if the partition can
receive the direct requests via the FFA_MSG_SEND_DIRECT_REQ2 ABI.

Tested-by: Viresh Kumar <viresh.kumar@linaro.org>
Message-Id: <20250217-ffa_updates-v3-9-bd1d9de615e7@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

diff --git a/include/linux/arm_ffa.h b/include/linux/arm_ffa.h
index ca2ad5b0ac4309052d55dcf546d29423bbd40a67..761ea8fe3bb6080c893a5eb365358b62d6a4f3ff 100644 (file)
--- a/include/linux/arm_ffa.h
+++ b/include/linux/arm_ffa.h
@@ -240,6 +240,10 @@ struct ffa_partition_info {
 #define FFA_PARTITION_NOTIFICATION_RECV        BIT(3)
 /* partition runs in the AArch64 execution state. */
 #define FFA_PARTITION_AARCH64_EXEC     BIT(8)
+/* partition supports receipt of direct request2 */
+#define FFA_PARTITION_DIRECT_REQ2_RECV BIT(9)
+/* partition can send direct request2. */
+#define FFA_PARTITION_DIRECT_REQ2_SEND BIT(10)
        u32 properties;
        uuid_t uuid;
 };
@@ -259,6 +263,10 @@ bool ffa_partition_check_property(struct ffa_device *dev, u32 property)
 #define ffa_partition_supports_direct_recv(dev)        \
        ffa_partition_check_property(dev, FFA_PARTITION_DIRECT_RECV)
 
+#define ffa_partition_supports_direct_req2_recv(dev)   \
+       (ffa_partition_check_property(dev, FFA_PARTITION_DIRECT_REQ2_RECV) && \
+        !dev->mode_32bit)
+
 /* For use with FFA_MSG_SEND_DIRECT_{REQ,RESP} which pass data via registers */
 struct ffa_send_direct_data {
        unsigned long data0; /* w3/x3 */