Changeset 8300c72 in mainline for uspace/srv/devman/client_conn.c

Timestamp:

2025-03-03T22:58:05Z (13 hours ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

master

Children:

77a0119

Parents:

f35749e

Message:

Quiesce devices before proceeding with shutdown.

Only implemented for e1k, uhci and xhci.

File:

• uspace/srv/devman/client_conn.c (modified) (3 diffs)

uspace/srv/devman/client_conn.c

@@ -1 +1 @@
 /*
+ * Copyright (c) 2025 Jiri Svoboda
  * Copyright (c) 2010 Lenka Trochtova
- * Copyright (c) 2013 Jiri Svoboda
  * All rights reserved.
  *
@@ -479 +479 @@
 }
 
+/** Quiesce function.
+ *
+ * Send a request to quiesce a function to the responsible driver.
+ */
+static void devman_fun_quiesce(ipc_call_t *icall)
+{
+        fun_node_t *fun;
+        dev_node_t *child;
+        errno_t rc;
+
+        fun = find_fun_node(&device_tree, ipc_get_arg1(icall));
+        if (fun == NULL) {
+                async_answer_0(icall, ENOENT);
+                return;
+        }
+
+        fibril_rwlock_read_lock(&device_tree.rwlock);
+
+        /* Check function state */
+        if (fun->state == FUN_REMOVED) {
+                fibril_rwlock_read_unlock(&device_tree.rwlock);
+                async_answer_0(icall, ENOENT);
+                return;
+        }
+
+        child = fun->child;
+        dev_add_ref(child);
+        fibril_rwlock_read_unlock(&device_tree.rwlock);
+
+        rc = driver_dev_quiesce(&device_tree, child);
+        fun_del_ref(fun);
+
+        async_answer_0(icall, rc);
+}
+
 /** Find handle for the function instance identified by its service ID. */
 static void devman_fun_sid_to_handle(ipc_call_t *icall)
@@ -790 +825 @@
                         devman_fun_offline(&call);
                         break;
+                case DEVMAN_FUN_QUIESCE:
+                        devman_fun_quiesce(&call);
+                        break;
                 case DEVMAN_FUN_SID_TO_HANDLE:
                         devman_fun_sid_to_handle(&call);