Commit 47561777 authored by Sudeep Holla's avatar Sudeep Holla
Browse files

firmware: arm_ffa: Implement the FFA_NOTIFICATION_SET interface 

The framework provides an interface to the sender to specify the
notification to signal to the receiver. A sender signals a notification
by requesting its partition manager to set the corresponding bit in the
notifications bitmap of the receiver invoking FFA_NOTIFICATION_SET.

Implement the FFA_NOTIFICATION_SET to enable the caller(sender) to send
the notifications for any other partitions in the system.

Link: https://lore.kernel.org/r/20231005-ffa_v1-1_notif-v4-5-cddd3237809c@arm.com


Signed-off-by: default avatarSudeep Holla <sudeep.holla@arm.com>
parent fe2ddb6b

drivers/firmware/arm_ffa/driver.c

+20 −0
Original line number Diff line number Diff line
@@ -616,6 +616,26 @@ static int ffa_notification_bind_common(u16 dst_id, u64 bitmap, 
	return 0;

}



static

int ffa_notification_set(u16 src_id, u16 dst_id, u32 flags, u64 bitmap)

{

	ffa_value_t ret;

	u32 src_dst_ids = PACK_TARGET_INFO(dst_id, src_id);



	invoke_ffa_fn((ffa_value_t) {

		  .a0 = FFA_NOTIFICATION_SET, .a1 = src_dst_ids, .a2 = flags,

		  .a3 = NOTIFICATION_BITMAP_LOW(bitmap),

		  .a4 = NOTIFICATION_BITMAP_HIGH(bitmap),

		  }, &ret);



	if (ret.a0 == FFA_ERROR)

		return ffa_to_linux_errno((int)ret.a2);

	else if (ret.a0 != FFA_SUCCESS)

		return -EINVAL;



	return 0;

}



static int ffa_run(struct ffa_device *dev, u16 vcpu)

{

	ffa_value_t ret;