Changeset 8300c72 in mainline for uspace/srv/devman/drv_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/drv_conn.c (modified) (2 diffs)

uspace/srv/devman/drv_conn.c

@@ -444 +444 @@
 
         rc = fun_offline(fun);
+        if (rc != EOK) {
+                fun_busy_unlock(fun);
+                fun_del_ref(fun);
+                async_answer_0(icall, rc);
+                return;
+        }
+
+        fun_busy_unlock(fun);
+        fun_del_ref(fun);
+        async_answer_0(icall, EOK);
+}
+
+/** Quiesce function by driver request.
+ *
+ */
+static void devman_drv_fun_quiesce(ipc_call_t *icall, driver_t *drv)
+{
+        fun_node_t *fun;
+        errno_t rc;
+
+        fun = find_fun_node(&device_tree, ipc_get_arg1(icall));
+        if (fun == NULL) {
+                async_answer_0(icall, ENOENT);
+                return;
+        }
+
+        fun_busy_lock(fun);
+
+        fibril_rwlock_write_lock(&device_tree.rwlock);
+        if (fun->dev == NULL || fun->dev->drv != drv) {
+                fun_busy_unlock(fun);
+                fun_del_ref(fun);
+                async_answer_0(icall, ENOENT);
+                return;
+        }
+        fibril_rwlock_write_unlock(&device_tree.rwlock);
+
+        rc = fun_quiesce(fun);
         if (rc != EOK) {
                 fun_busy_unlock(fun);
@@ -677 +715 @@
                         devman_drv_fun_offline(&call, driver);
                         break;
+                case DEVMAN_DRV_FUN_QUIESCE:
+                        devman_drv_fun_quiesce(&call, driver);
+                        break;
                 case DEVMAN_DRV_FUN_WAIT_STABLE:
                         devman_drv_fun_wait_stable(&call, driver);