From e5adb3b20e39dbf18651322a9bc24eb55050188f Mon Sep 17 00:00:00 2001
From: Sudeep Holla <sudeep.holla@arm.com>
Date: Thu, 5 Oct 2023 15:45:04 +0100
Subject: 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: Sudeep Holla <sudeep.holla@arm.com>
---
drivers/firmware/arm_ffa/driver.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
(limited to 'drivers/firmware/arm_ffa')
diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c
index 1c3b34eb06e4..590005234073 100644
--- a/drivers/firmware/arm_ffa/driver.c
+++ b/drivers/firmware/arm_ffa/driver.c
@@ -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 = {
--
cgit