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| author | Sudeep Holla <sudeep.holla@arm.com> | 2023-10-05 15:45:04 +0100 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2023-10-06 15:33:13 +0100 |
| commit | e5adb3b20e39dbf18651322a9bc24eb55050188f (patch) | |
| tree | baa368a0371005c72e74d05421db4ffe96b37c70 | |
| parent | e0573444edbf4ee7e3c191d3d08a4ccbd26628be (diff) | |
| download | linux-stable-e5adb3b20e39dbf18651322a9bc24eb55050188f.tar.gz linux-stable-e5adb3b20e39dbf18651322a9bc24eb55050188f.tar.bz2 linux-stable-e5adb3b20e39dbf18651322a9bc24eb55050188f.zip | |
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>
| -rw-r--r-- | drivers/firmware/arm_ffa/driver.c | 13 | ||||
| -rw-r--r-- | include/linux/arm_ffa.h | 2 |
2 files changed, 15 insertions, 0 deletions
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 = { diff --git a/include/linux/arm_ffa.h b/include/linux/arm_ffa.h index fb6f388a3737..f6df81f14b6d 100644 --- a/include/linux/arm_ffa.h +++ b/include/linux/arm_ffa.h @@ -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 { |