From: Peter Dinda <pdinda@northwestern.edu>
Date: Fri, 22 Mar 2013 20:41:21 +0000 (-0500)
Subject: Graphics console user space interface library
X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=commitdiff_plain;h=574d2595bd6502d1dc785ace50d46d052a2c8525;p=palacios.git

Graphics console user space interface library
---

diff --git a/linux_usr/Makefile b/linux_usr/Makefile
index 609a4a4..64a2b7e 100644
--- a/linux_usr/Makefile
+++ b/linux_usr/Makefile
@@ -64,7 +64,7 @@ COPIED_EXECS = v3_x0vncserver v3_x0gui
 #
 # Libraries that we need to build
 #
-LIBS = libv3_user_host_dev.a libv3_user_keyed_stream.a libv3_ctrl.a libv3_guest_mem.a
+LIBS = libv3_user_host_dev.a libv3_user_keyed_stream.a libv3_ctrl.a libv3_guest_mem.a libv3_fb.a
 
 BUILD_EXECS = $(BASE_EXECS) $(EXAMPLE_EXECS) $(EXPERIMENTAL_EXECS) 
 BUILD_LIBS = $(LIBS)
@@ -161,6 +161,15 @@ v3_guest_mem_example : v3_guest_mem_example.c libv3_guest_mem.a
 	$(CC) $(CFLAGS) $< -L. -lv3_guest_mem -o $@
 
 
+#
+# FB (Graphics Console) user interface library (needed for VNC access
+#  to GC - also wraps mouse and keyboard event delivery)
+libv3_fb.a : v3_fb.c v3_fb.h
+	$(CC) $(CFLAGS) -I../linux_module -c v3_fb.c
+	$(AR) ruv libv3_fb.a v3_fb.o
+	rm -rf v3_fb.o 
+
+
 
 #
 # VNC support is compiled separately
diff --git a/linux_usr/v3_fb.c b/linux_usr/v3_fb.c
new file mode 100644
index 0000000..69240ec
--- /dev/null
+++ b/linux_usr/v3_fb.c
@@ -0,0 +1,110 @@
+#include "v3_fb.h"
+
+
+// This is the data structure that is passed back and forth with user-land
+// ioctl
+#define V3_VM_FB_INPUT 256+1
+struct v3_fb_input {
+    enum { V3_FB_KEY, V3_FB_MOUSE, V3_FB_BOTH}   data_type;
+    uint8_t                              scan_code;
+    uint8_t                              mouse_data[3];
+};
+
+#define V3_VM_FB_QUERY 256+2
+#define __user 
+struct v3_fb_query_response {
+    enum e { V3_FB_DATA_ALL, V3_FB_DATA_BOX, V3_FB_UPDATE, V3_FB_SPEC }  request_type;
+    struct v3_frame_buffer_spec spec;    // in: desired spec; out: actual spec
+    uint32_t x, y, w, h;                 // region to copy (0s = all) in/out args
+    int updated;                         // whether this region has been updated or not
+    void __user *data;                   // user space pointer to copy data to
+};
+
+int v3_send_key(int fd, uint8_t scan_code) 
+{
+    struct v3_fb_input e;
+
+    e.data_type=V3_FB_KEY;
+    e.scan_code=scan_code;
+
+    if (ioctl(fd,V3_VM_FB_INPUT,&e)<0) { 
+	perror("v3_send_key");
+	return -1;
+    }
+    
+    return 0;
+}
+
+
+int v3_send_mouse(int fd, uint8_t mx, uint8_t my, uint8_t button)
+{
+    struct v3_fb_input e;
+
+    e.data_type=V3_FB_MOUSE;
+    e.mouse_data[0]=mx;
+    e.mouse_data[1]=my;
+    e.mouse_data[2]=button;
+
+    if (ioctl(fd,V3_VM_FB_INPUT,&e)<0) { 
+	perror("v3_send_mouse");
+	return -1;
+    }
+
+    return 0;
+}
+
+int v3_get_fb_spec(int fd, struct v3_frame_buffer_spec *spec)
+{
+    struct v3_fb_query_response q;
+
+    q.request_type=V3_FB_SPEC;
+    
+    if (ioctl(fd,V3_VM_FB_QUERY,&q)<0) { 
+	perror("v3_get_fb_spec");
+	return -1;
+
+    }
+
+    *spec = q.spec;
+    
+    return 0;
+}
+
+int v3_get_fb_data(int fd, struct v3_frame_buffer_spec *spec, void *data)
+{
+    struct v3_fb_query_response q;
+
+    q.request_type=V3_FB_DATA_ALL;
+    q.spec=*spec;
+    q.data=data;
+
+    if (ioctl(fd,V3_VM_FB_QUERY,&q)<0) { 
+	perror("v3_get_fb_data");
+	return -1;
+    }
+
+    *spec = q.spec;
+    
+    return 0;
+    
+}
+
+int v3_have_update(int fd)
+{
+    struct v3_fb_query_response q;
+    int updated;
+
+    q.request_type=V3_FB_UPDATE;
+    q.x=0;
+    q.y=0;
+    q.w=(uint32_t) -1;
+    q.h=(uint32_t) -1;
+
+    if (ioctl(fd,V3_VM_FB_QUERY,&q)<0) {
+	perror("v3_get_fb_data");
+	return -1;
+    }
+
+    return q.updated;
+
+}    
diff --git a/linux_usr/v3_fb.h b/linux_usr/v3_fb.h
new file mode 100644
index 0000000..4c93c57
--- /dev/null
+++ b/linux_usr/v3_fb.h
@@ -0,0 +1,33 @@
+#ifndef __v3_fb_h__
+#define __v3_fb_h__
+
+#ifdef __cplusplus
+#define EXTERNC extern "C"
+#else
+#define EXTERNC
+#endif
+
+#include <stdint.h>
+
+
+EXTERNC struct v3_frame_buffer_spec {
+    uint32_t height;
+    uint32_t width;
+    uint8_t  bytes_per_pixel; 
+    uint8_t  bits_per_channel;
+    uint8_t  red_offset;   // byte offset in pixel to get to red channel
+    uint8_t  green_offset; // byte offset in pixel to get to green channel
+    uint8_t  blue_offset;  // byte offset in pixel to get to blue channel
+};
+
+EXTERNC int v3_get_fb_spec(int fd, struct v3_frame_buffer_spec *spec);
+EXTERNC int v3_have_update(int fd);
+EXTERNC int v3_get_fb_data(int fd, struct v3_frame_buffer_spec *spec, void *data);
+
+
+EXTERNC int v3_send_key(int fd, uint8_t scan_code);
+EXTERNC int v3_send_mouse(int fd, uint8_t mx, uint8_t my, uint8_t button);
+
+
+
+#endif