This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / xen / interface / io / fbif.h

diff --git a/include/xen/interface/io/fbif.h b/include/xen/interface/io/fbif.h
new file mode 100644 (file)
index 0000000..7b8861d
--- /dev/null
+++ b/include/xen/interface/io/fbif.h
@@ -0,0 +1,116 @@
+/*
+ * fbif.h -- Xen virtual frame buffer device
+ *
+ * Copyright (C) 2005 Anthony Liguori <aliguori@us.ibm.com>
+ * Copyright (C) 2006 Red Hat, Inc., Markus Armbruster <armbru@redhat.com>
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License. See the file COPYING in the main directory of this archive for
+ *  more details.
+ */
+
+#ifndef __XEN_PUBLIC_IO_FBIF_H__
+#define __XEN_PUBLIC_IO_FBIF_H__
+
+#include <asm/types.h>
+
+/* Out events (frontend -> backend) */
+
+/*
+ * Out events may be sent only when requested by backend, and receipt
+ * of an unknown out event is an error.
+ */
+
+/* Event type 1 currently not used */
+/*
+ * Framebuffer update notification event
+ * Capable frontend sets feature-update in xenstore.
+ * Backend requests it by setting request-update in xenstore.
+ */
+#define XENFB_TYPE_UPDATE 2
+
+struct xenfb_update
+{
+       __u8 type;              /* XENFB_TYPE_UPDATE */
+       __s32 x;                /* source x */
+       __s32 y;                /* source y */
+       __s32 width;            /* rect width */
+       __s32 height;           /* rect height */
+};
+
+#define XENFB_OUT_EVENT_SIZE 40
+
+union xenfb_out_event
+{
+       __u8 type;
+       struct xenfb_update update;
+       char pad[XENFB_OUT_EVENT_SIZE];
+};
+
+/* In events (backend -> frontend) */
+
+/*
+ * Frontends should ignore unknown in events.
+ * No in events currently defined.
+ */
+
+#define XENFB_IN_EVENT_SIZE 40
+
+union xenfb_in_event
+{
+       __u8 type;
+       char pad[XENFB_IN_EVENT_SIZE];
+};
+
+/* shared page */
+
+#define XENFB_IN_RING_SIZE 1024
+#define XENFB_IN_RING_LEN (XENFB_IN_RING_SIZE / XENFB_IN_EVENT_SIZE)
+#define XENFB_IN_RING_OFFS 1024
+#define XENFB_IN_RING(page) \
+    ((union xenfb_in_event *)((char *)(page) + XENFB_IN_RING_OFFS))
+#define XENFB_IN_RING_REF(page, idx) \
+    (XENFB_IN_RING((page))[(idx) % XENFB_IN_RING_LEN])
+
+#define XENFB_OUT_RING_SIZE 2048
+#define XENFB_OUT_RING_LEN (XENFB_OUT_RING_SIZE / XENFB_OUT_EVENT_SIZE)
+#define XENFB_OUT_RING_OFFS (XENFB_IN_RING_OFFS + XENFB_IN_RING_SIZE)
+#define XENFB_OUT_RING(page) \
+    ((union xenfb_out_event *)((char *)(page) + XENFB_OUT_RING_OFFS))
+#define XENFB_OUT_RING_REF(page, idx) \
+    (XENFB_OUT_RING((page))[(idx) % XENFB_OUT_RING_LEN])
+
+struct xenfb_page
+{
+       __u32 in_cons, in_prod;
+       __u32 out_cons, out_prod;
+
+       __s32 width;         /* the width of the framebuffer (in pixels) */
+       __s32 height;        /* the height of the framebuffer (in pixels) */
+       __u32 line_length;   /* the length of a row of pixels (in bytes) */
+       __u32 mem_length;    /* the length of the framebuffer (in bytes) */
+       __u8 depth;          /* the depth of a pixel (in bits) */
+
+       /*
+        * Framebuffer page directory
+        *
+        * Each directory page holds PAGE_SIZE / sizeof(*pd)
+        * framebuffer pages, and can thus map up to PAGE_SIZE *
+        * PAGE_SIZE / sizeof(*pd) bytes.  With PAGE_SIZE == 4096 and
+        * sizeof(unsigned long) == 4, that's 4 Megs.  Two directory
+        * pages should be enough for a while.
+        */
+       unsigned long pd[2];
+};
+
+/*
+ * Wart: xenkbd needs to know resolution.  Put it here until a better
+ * solution is found, but don't leak it to the backend.
+ */
+#ifdef __KERNEL__
+#define XENFB_WIDTH 800
+#define XENFB_HEIGHT 600
+#define XENFB_DEPTH 32
+#endif
+
+#endif