pci_front bugfix - do not propagate cmd reg write twice

[palacios.git] / palacios / include / interfaces / vmm_stream.h

diff --git a/palacios/include/interfaces/vmm_stream.h b/palacios/include/interfaces/vmm_stream.h
index 513cf73..4a36e1b 100644 (file)
--- a/palacios/include/interfaces/vmm_stream.h
+++ b/palacios/include/interfaces/vmm_stream.h
@@ -23,24 +23,42 @@
 
 
 
+struct v3_stream {
+    void * host_stream_data;
+    void * guest_stream_data;
+  // the semantics are:
+  // negative return = error
+  // zero return = would block
+  // otherwise = amount of data transfered
+    sint64_t (*input)(struct v3_stream * stream, uint8_t * buf, sint64_t len);
+};
+
+
 #ifdef __V3VEE__
 #include <palacios/vmm.h>
 
-typedef void * v3_stream_t;
+
 
 /* VM Can be NULL */
-v3_stream_t v3_stream_open(struct v3_vm_info * vm, const char * name);
-int v3_stream_write(v3_stream_t stream, uint8_t * buf, uint32_t len);
+struct v3_stream * v3_stream_open(struct v3_vm_info * vm, const char * name,
+                                 sint64_t (*input)(struct v3_stream * stream, uint8_t * buf, sint64_t len),
+                                 void * guest_stream_data);
+
+// the semantics are:
+// negative return = error
+// zero return = would block
+// otherwise = amount of data transfered
+sint64_t  v3_stream_output(struct v3_stream * stream, uint8_t * buf, sint64_t len);
 
-void v3_stream_close(v3_stream_t stream);
+void v3_stream_close(struct v3_stream * stream);
 
 #endif
 
 
 struct v3_stream_hooks {
-    void *(*open)(const char * name, void * private_data);
-    int (*write)(void * stream, char * buf, int len);
-    void (*close)(void * stream);
+    void *(*open)(struct v3_stream * stream, const char * name, void * host_vm_data);
+    sint64_t (*output)(struct v3_stream * stream, uint8_t * buf, sint64_t len);
+    void (*close)(struct v3_stream * stream);
 };