tegra: safety: Add client registration

Add client registration and deregistration calls.
The clients registers with a callback function which gets called when
ivc ready is received from L2SS.

Bug 200700404

Change-Id: I358f4ad7ada547dfb81bb60c990b2f84235a9651
Signed-off-by: Preetham Chandru Ramchandra <pchandru@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2531217
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

2 files changed, 53 insertions, 0 deletions

diff --git a/include/linux/tegra_l1ss_ioctl.h b/include/linux/tegra_l1ss_ioctl.h
index 195ef04d2..f42697499 100644
--- a/include/linux/tegra_l1ss_ioctl.h
+++ b/include/linux/tegra_l1ss_ioctl.h
@@ -232,6 +232,13 @@ typedef struct {
         };
 } nv_guard_request_t;
 
+/*
+ * Identifies a client
+ */
+typedef uint32_t nv_guard_client_id_t;
+
+#define NVGUARD_INVALID_CLIENTID                (0U)
+#define NVGUARD_MAX_CLIENT_CONNECTIONS          (4U * NVGUARD_GROUPID_MAX)
 
 #define L1SS_CLIENT_REQUEST     _IOR(L1SS_IOCTL_MAGIC, 1, nv_guard_request_t)
 
diff --git a/include/linux/tegra_l1ss_kernel_interface.h b/include/linux/tegra_l1ss_kernel_interface.h
index 62e34592b..105f487a5 100644
--- a/include/linux/tegra_l1ss_kernel_interface.h
+++ b/include/linux/tegra_l1ss_kernel_interface.h
@@ -17,7 +17,53 @@
 #ifndef _L1SS_INTERFACE_H
 #define _L1SS_INTERFACE_H
 
+#include <linux/types.h>
 #include <linux/tegra_l1ss_ioctl.h>
 
+typedef enum {
+        L1SS_NOT_READY,
+        L1SS_READY,
+        L1SS_ALIVE_CHECK,
+} l1ss_cli_callback_param;
+
+typedef int (*client_callback)(l1ss_cli_callback_param, void *);
+
+typedef struct {
+        nv_guard_client_id_t id;
+        client_callback cli_callback;
+        void *data;
+} client_param_t;
+
+struct l1ss_client_param_node {
+        struct list_head cli_list;
+        client_param_t *p;
+};
+
+#ifdef CONFIG_TEGRA_SAFETY
 int l1ss_submit_rq(nv_guard_request_t *req, bool can_sleep);
+int l1ss_register_client(client_param_t *p);
+int l1ss_deregister_client(nv_guard_client_id_t id);
+int l1ss_notify_client(l1ss_cli_callback_param val);
+void l1ss_set_ivc_ready(void);
+#else
+inline int l1ss_register_client(client_param_t *p)
+{
+        return -ENODEV;
+}
+
+inline int l1ss_deregister_client(nv_guard_client_id_t id)
+{
+        return 0;
+}
+
+inline int l1ss_notify_client(l1ss_cli_callback_param val)
+{
+        return 0;
+}
+
+inline int l1ss_submit_rq(nv_guard_request_t *req, bool can_sleep)
+{
+        return 0;
+}
+#endif
 #endif