video: tegra: host: add User API to trigger event on poll'able FD

Add User IOCTL API NVHOST_IOCTL_CTRL_POLL_FD_TRIGGER_EVENT which will accept
a syncpoint_id, a threshold and a file descriptor

This API will register a fast notifier with syncpoint_id and threshold,
and the notifier will post the event to poll'able fd received

Bug 200326065
Jira HOSTX-332

Change-Id: I2eb452aea9beb2edb395f11b75f35511e108d42d
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1665695
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 10 insertions, 1 deletions

diff --git a/include/linux/nvhost_ioctl.h b/include/linux/nvhost_ioctl.h
index 94d0f4a99..1c7b99d10 100644
--- a/include/linux/nvhost_ioctl.h
+++ b/include/linux/nvhost_ioctl.h
@@ -444,6 +444,13 @@ struct nvhost_ctrl_poll_fd_create_args {
         __u32 padding;
 };
 
+struct nvhost_ctrl_poll_fd_trigger_event_args {
+        __s32 fd;
+        __u32 id;
+        __u32 thresh;
+        __u32 padding;
+};
+
 #define NVHOST_IOCTL_CTRL_SYNCPT_READ           \
         _IOWR(NVHOST_IOCTL_MAGIC, 1, struct nvhost_ctrl_syncpt_read_args)
 #define NVHOST_IOCTL_CTRL_SYNCPT_INCR           \
@@ -482,9 +489,11 @@ struct nvhost_ctrl_poll_fd_create_args {
         _IOWR(NVHOST_IOCTL_MAGIC, 15, struct nvhost_ctrl_check_module_support_args)
 #define NVHOST_IOCTL_CTRL_POLL_FD_CREATE        \
         _IOR(NVHOST_IOCTL_MAGIC, 16, struct nvhost_ctrl_poll_fd_create_args)
+#define NVHOST_IOCTL_CTRL_POLL_FD_TRIGGER_EVENT        \
+        _IOW(NVHOST_IOCTL_MAGIC, 17, struct nvhost_ctrl_poll_fd_trigger_event_args)
 
 #define NVHOST_IOCTL_CTRL_LAST                  \
-        _IOC_NR(NVHOST_IOCTL_CTRL_POLL_FD_CREATE)
+        _IOC_NR(NVHOST_IOCTL_CTRL_POLL_FD_TRIGGER_EVENT)
 #define NVHOST_IOCTL_CTRL_MAX_ARG_SIZE  \
         sizeof(struct nvhost_ctrl_syncpt_waitmex_args)