Changeset 47a7174f in mainline for uspace/lib/c/generic/devmap.c

Timestamp:

2010-12-17T22:03:15Z (13 years ago)

Author:

Vojtech Horky <vojtechhorky@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

7551706b

Parents:

0bff73a

Message:

Devmap drivers can customize forwarded connections

It is possible to set an extra parameter for forwarded connections through
devmap. The change shall ensure backward compatibility and allows to connect
to devman-style drivers through their devmap path.

File:

• uspace/lib/c/generic/devmap.c (modified) (2 diffs)

uspace/lib/c/generic/devmap.c

@@ -127 +127 @@
 /** Register new device.
  *
- * @param namespace Namespace name.
+ * The @p interface is used when forwarding connection to the driver.
+ * If not 0, the first argument is the interface and the second argument
+ * is the devmap handle of the device.
+ * When the interface is zero (default), the first argument is directly
+ * the handle (to ensure backward compatibility).
+ *
+ * @param fqdn Fully qualified device name.
+ * @param[out] handle Handle to the created instance of device.
+ * @param interface Interface when forwarding.
+ *
+ */
+int devmap_device_register_with_iface(const char *fqdn,
+    devmap_handle_t *handle, sysarg_t interface)
+{
+        int phone = devmap_get_phone(DEVMAP_DRIVER, IPC_FLAG_BLOCKING);
+        
+        if (phone < 0)
+                return phone;
+        
+        async_serialize_start();
+        
+        ipc_call_t answer;
+        aid_t req = async_send_2(phone, DEVMAP_DEVICE_REGISTER, interface, 0,
+            &answer);
+        
+        sysarg_t retval = async_data_write_start(phone, fqdn, str_size(fqdn));
+        if (retval != EOK) {
+                async_wait_for(req, NULL);
+                async_serialize_end();
+                return retval;
+        }
+        
+        async_wait_for(req, &retval);
+        
+        async_serialize_end();
+        
+        if (retval != EOK) {
+                if (handle != NULL)
+                        *handle = -1;
+                return retval;
+        }
+        
+        if (handle != NULL)
+                *handle = (devmap_handle_t) IPC_GET_ARG1(answer);
+        
+        return retval;
+}
+
+/** Register new device.
+ *
  * @param fqdn      Fully qualified device name.
  * @param handle    Output: Handle to the created instance of device.
@@ -134 +183 @@
 int devmap_device_register(const char *fqdn, devmap_handle_t *handle)
 {
-        int phone = devmap_get_phone(DEVMAP_DRIVER, IPC_FLAG_BLOCKING);
-        
-        if (phone < 0)
-                return phone;
-        
-        async_serialize_start();
-        
-        ipc_call_t answer;
-        aid_t req = async_send_2(phone, DEVMAP_DEVICE_REGISTER, 0, 0,
-            &answer);
-        
-        sysarg_t retval = async_data_write_start(phone, fqdn, str_size(fqdn));
-        if (retval != EOK) {
-                async_wait_for(req, NULL);
-                async_serialize_end();
-                return retval;
-        }
-        
-        async_wait_for(req, &retval);
-        
-        async_serialize_end();
-        
-        if (retval != EOK) {
-                if (handle != NULL)
-                        *handle = -1;
-                return retval;
-        }
-        
-        if (handle != NULL)
-                *handle = (devmap_handle_t) IPC_GET_ARG1(answer);
-        
-        return retval;
-}
+        return devmap_device_register_with_iface(fqdn, handle, 0);
+}
+
 
 int devmap_device_get_handle(const char *fqdn, devmap_handle_t *handle, unsigned int flags)