Changeset 0b63dc2 in mainline for uspace/lib/ddev/src

Timestamp:

2019-12-07T20:26:28Z (6 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

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

Children:

df1a019

Parents:

71cbe5c

Message:

Switch compositor → display server

Convert KFB from visualizer to display device interface. Add ability
of display device implementor to provide client with arg2, arg3 needed
to connect to GC.

Location:

uspace/lib/ddev/src

Files:

• ddev.c (modified) (1 diff)
• ddev_srv.c (modified) (2 diffs)

uspace/lib/ddev/src/ddev.c

@@ -88 +88 @@
         async_sess_t *sess;
         async_exch_t *exch;
+        sysarg_t arg2;
+        sysarg_t arg3;
         ipc_gc_t *gc;
         errno_t rc;
 
         exch = async_exchange_begin(ddev->sess);
-        sess = async_connect_me_to(exch, INTERFACE_GC, 0, 42);
-        if (sess == NULL) {
-                async_exchange_end(exch);
+        rc = async_req_0_2(exch, DDEV_GET_GC, &arg2, &arg3);
+        sess = async_connect_me_to(exch, INTERFACE_GC, arg2, arg3);
+        async_exchange_end(exch);
+
+        if (sess == NULL)
                 return EIO;
-        }
-
-        async_exchange_end(exch);
 
         rc = ipc_gc_create(sess, &gc);

uspace/lib/ddev/src/ddev_srv.c

@@ -45 +45 @@
 #include <stdio.h>
 
+/** Connect to a GC.
+ *
+ * XXX As a workaround here we tell the client the values of arg2 and arg3
+ * needed to connect to the GC using async_connect_me_to(), these need
+ * to be provided by the ddev_ops_t.get_gc. Different values are needed
+ * for a DDF driver or a regular server. This would not be needed if we
+ * had a proper way of creating an endpoint and passing it to our client.
+ */
+static void ddev_get_gc_srv(ddev_srv_t *srv, ipc_call_t *icall)
+{
+        sysarg_t arg2;
+        sysarg_t arg3;
+        errno_t rc;
+
+        printf("ddev_get_gc_srv\n");
+
+        if (srv->ops->get_gc == NULL) {
+                async_answer_0(icall, ENOTSUP);
+                return;
+        }
+
+        rc = srv->ops->get_gc(srv->arg, &arg2, &arg3);
+        async_answer_2(icall, rc, arg2, arg3);
+}
+
 void ddev_conn(ipc_call_t *icall, ddev_srv_t *srv)
 {
         /* Accept the connection */
         async_accept_0(icall);
-        printf("display_conn\n");
+        printf("ddev_conn\n");
 
         while (true) {
@@ -66 +91 @@
                 switch (method) {
                 case DDEV_GET_GC:
+                        ddev_get_gc_srv(srv, &call);
+                        break;
                 default:
                         async_answer_0(&call, ENOTSUP);