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firmware: arm_ffa: Implement the FFA_NOTIFICATION_SET interface

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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: Sudeep Holla <sudeep.holla@arm.com>
This commit is contained in:
Sudeep Holla 2023-10-05 15:44:58 +01:00
parent fe2ddb6b42
commit 47561777d6
1 changed files with 20 additions and 0 deletions
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20
drivers/firmware/arm_ffa/driver.c
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@ -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;