Commit e5adb3b2 authored by Sudeep Holla's avatar Sudeep Holla
Browse files

firmware: arm_ffa: Add interface to send a notification to a given partition 

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

Expose the ability to send a notification to another partition.

Link: https://lore.kernel.org/r/20231005-ffa_v1-1_notif-v4-11-cddd3237809c@arm.com


Signed-off-by: default avatarSudeep Holla <sudeep.holla@arm.com>
parent e0573444

drivers/firmware/arm_ffa/driver.c

+13 −0
Original line number Diff line number Diff line
@@ -1038,6 +1038,18 @@ static int ffa_notify_request(struct ffa_device *dev, bool is_per_vcpu, 
	return rc;

}



static int ffa_notify_send(struct ffa_device *dev, int notify_id,

			   bool is_per_vcpu, u16 vcpu)

{

	u32 flags = 0;



	if (is_per_vcpu)

		flags |= (PER_VCPU_NOTIFICATION_FLAG | vcpu << 16);



	return ffa_notification_set(dev->vm_id, drv_info->vm_id, flags,

				    BIT(notify_id));

}



static const struct ffa_info_ops ffa_drv_info_ops = {

	.api_version_get = ffa_api_version_get,

	.partition_info_get = ffa_partition_info_get,
@@ -1063,6 +1075,7 @@ static const struct ffa_notifier_ops ffa_drv_notifier_ops = { 
	.sched_recv_cb_unregister = ffa_sched_recv_cb_unregister,

	.notify_request = ffa_notify_request,

	.notify_relinquish = ffa_notify_relinquish,

	.notify_send = ffa_notify_send,

};



static const struct ffa_ops ffa_drv_ops = {

include/linux/arm_ffa.h

+2 −0
Original line number Diff line number Diff line
@@ -401,6 +401,8 @@ struct ffa_notifier_ops { 
	int (*notify_request)(struct ffa_device *dev, bool per_vcpu,

			      ffa_notifier_cb cb, void *cb_data, int notify_id);

	int (*notify_relinquish)(struct ffa_device *dev, int notify_id);

	int (*notify_send)(struct ffa_device *dev, int notify_id, bool per_vcpu,

			   u16 vcpu);

};



struct ffa_ops {