Messages in this thread Patch in this message | | | From | Sudeep Holla <> | Subject | [PATCH RFT 11/12] firmware: arm_ffa: Add interface to send a notification to a given partition | Date | Thu, 3 Aug 2023 20:02:15 +0100 |
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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.
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> --- drivers/firmware/arm_ffa/driver.c | 13 +++++++++++++ include/linux/arm_ffa.h | 2 ++ 2 files changed, 15 insertions(+)
diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index 29f69f7010c9..d98d0fbe5605 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -1015,6 +1015,18 @@ 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, @@ -1040,6 +1052,7 @@ 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 = { diff --git a/include/linux/arm_ffa.h b/include/linux/arm_ffa.h index 99440129b733..3bba5f999e4f 100644 --- a/include/linux/arm_ffa.h +++ b/include/linux/arm_ffa.h @@ -402,6 +402,8 @@ 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 { -- 2.41.0
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