Messages in this thread Patch in this message | | | From | Sudeep Holla <> | Date | Fri, 29 Sep 2023 16:02:54 +0100 | Subject | [PATCH v3 05/17] 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.
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> --- drivers/firmware/arm_ffa/driver.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)
diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index b265063e76ea..b0d1ddfe0230 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -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; -- 2.42.0
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