Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 487 insertions, 0 deletions

diff --git a/include/ui/console.h b/include/ui/console.h
new file mode 100644
index 000000000..6d678924f
--- /dev/null
+++ b/include/ui/console.h
@@ -0,0 +1,487 @@
+#ifndef CONSOLE_H
+#define CONSOLE_H
+
+#include "ui/qemu-pixman.h"
+#include "qom/object.h"
+#include "qemu/notify.h"
+#include "qemu/error-report.h"
+#include "qapi/qapi-types-ui.h"
+
+#ifdef CONFIG_OPENGL
+# include <epoxy/gl.h>
+# include "ui/shader.h"
+#endif
+
+/* keyboard/mouse support */
+
+#define MOUSE_EVENT_LBUTTON 0x01
+#define MOUSE_EVENT_RBUTTON 0x02
+#define MOUSE_EVENT_MBUTTON 0x04
+#define MOUSE_EVENT_WHEELUP 0x08
+#define MOUSE_EVENT_WHEELDN 0x10
+
+/* identical to the ps/2 keyboard bits */
+#define QEMU_SCROLL_LOCK_LED (1 << 0)
+#define QEMU_NUM_LOCK_LED    (1 << 1)
+#define QEMU_CAPS_LOCK_LED   (1 << 2)
+
+/* in ms */
+#define GUI_REFRESH_INTERVAL_DEFAULT    30
+#define GUI_REFRESH_INTERVAL_IDLE     3000
+
+/* Color number is match to standard vga palette */
+enum qemu_color_names {
+    QEMU_COLOR_BLACK   = 0,
+    QEMU_COLOR_BLUE    = 1,
+    QEMU_COLOR_GREEN   = 2,
+    QEMU_COLOR_CYAN    = 3,
+    QEMU_COLOR_RED     = 4,
+    QEMU_COLOR_MAGENTA = 5,
+    QEMU_COLOR_YELLOW  = 6,
+    QEMU_COLOR_WHITE   = 7
+};
+/* Convert to curses char attributes */
+#define ATTR2CHTYPE(c, fg, bg, bold) \
+    ((bold) << 21 | (bg) << 11 | (fg) << 8 | (c))
+
+typedef void QEMUPutKBDEvent(void *opaque, int keycode);
+typedef void QEMUPutLEDEvent(void *opaque, int ledstate);
+typedef void QEMUPutMouseEvent(void *opaque, int dx, int dy, int dz, int buttons_state);
+
+typedef struct QEMUPutMouseEntry QEMUPutMouseEntry;
+typedef struct QEMUPutKbdEntry QEMUPutKbdEntry;
+typedef struct QEMUPutLEDEntry QEMUPutLEDEntry;
+
+QEMUPutKbdEntry *qemu_add_kbd_event_handler(QEMUPutKBDEvent *func,
+                                            void *opaque);
+QEMUPutMouseEntry *qemu_add_mouse_event_handler(QEMUPutMouseEvent *func,
+                                                void *opaque, int absolute,
+                                                const char *name);
+void qemu_remove_mouse_event_handler(QEMUPutMouseEntry *entry);
+void qemu_activate_mouse_event_handler(QEMUPutMouseEntry *entry);
+
+QEMUPutLEDEntry *qemu_add_led_event_handler(QEMUPutLEDEvent *func, void *opaque);
+void qemu_remove_led_event_handler(QEMUPutLEDEntry *entry);
+
+void kbd_put_ledstate(int ledstate);
+
+void hmp_mouse_set(Monitor *mon, const QDict *qdict);
+
+/* keysym is a unicode code except for special keys (see QEMU_KEY_xxx
+   constants) */
+#define QEMU_KEY_ESC1(c) ((c) | 0xe100)
+#define QEMU_KEY_BACKSPACE  0x007f
+#define QEMU_KEY_UP         QEMU_KEY_ESC1('A')
+#define QEMU_KEY_DOWN       QEMU_KEY_ESC1('B')
+#define QEMU_KEY_RIGHT      QEMU_KEY_ESC1('C')
+#define QEMU_KEY_LEFT       QEMU_KEY_ESC1('D')
+#define QEMU_KEY_HOME       QEMU_KEY_ESC1(1)
+#define QEMU_KEY_END        QEMU_KEY_ESC1(4)
+#define QEMU_KEY_PAGEUP     QEMU_KEY_ESC1(5)
+#define QEMU_KEY_PAGEDOWN   QEMU_KEY_ESC1(6)
+#define QEMU_KEY_DELETE     QEMU_KEY_ESC1(3)
+
+#define QEMU_KEY_CTRL_UP         0xe400
+#define QEMU_KEY_CTRL_DOWN       0xe401
+#define QEMU_KEY_CTRL_LEFT       0xe402
+#define QEMU_KEY_CTRL_RIGHT      0xe403
+#define QEMU_KEY_CTRL_HOME       0xe404
+#define QEMU_KEY_CTRL_END        0xe405
+#define QEMU_KEY_CTRL_PAGEUP     0xe406
+#define QEMU_KEY_CTRL_PAGEDOWN   0xe407
+
+void kbd_put_keysym_console(QemuConsole *s, int keysym);
+bool kbd_put_qcode_console(QemuConsole *s, int qcode, bool ctrl);
+void kbd_put_string_console(QemuConsole *s, const char *str, int len);
+void kbd_put_keysym(int keysym);
+
+/* consoles */
+
+#define TYPE_QEMU_CONSOLE "qemu-console"
+OBJECT_DECLARE_TYPE(QemuConsole, QemuConsoleClass, QEMU_CONSOLE)
+
+
+struct QemuConsoleClass {
+    ObjectClass parent_class;
+};
+
+#define QEMU_ALLOCATED_FLAG     0x01
+#define QEMU_PLACEHOLDER_FLAG   0x02
+
+typedef struct DisplaySurface {
+    pixman_format_code_t format;
+    pixman_image_t *image;
+    uint8_t flags;
+#ifdef CONFIG_OPENGL
+    GLenum glformat;
+    GLenum gltype;
+    GLuint texture;
+#endif
+} DisplaySurface;
+
+typedef struct QemuUIInfo {
+    /* physical dimension */
+    uint16_t width_mm;
+    uint16_t height_mm;
+    /* geometry */
+    int       xoff;
+    int       yoff;
+    uint32_t  width;
+    uint32_t  height;
+} QemuUIInfo;
+
+/* cursor data format is 32bit RGBA */
+typedef struct QEMUCursor {
+    int                 width, height;
+    int                 hot_x, hot_y;
+    int                 refcount;
+    uint32_t            data[];
+} QEMUCursor;
+
+QEMUCursor *cursor_alloc(int width, int height);
+void cursor_get(QEMUCursor *c);
+void cursor_put(QEMUCursor *c);
+QEMUCursor *cursor_builtin_hidden(void);
+QEMUCursor *cursor_builtin_left_ptr(void);
+void cursor_print_ascii_art(QEMUCursor *c, const char *prefix);
+int cursor_get_mono_bpl(QEMUCursor *c);
+void cursor_set_mono(QEMUCursor *c,
+                     uint32_t foreground, uint32_t background, uint8_t *image,
+                     int transparent, uint8_t *mask);
+void cursor_get_mono_image(QEMUCursor *c, int foreground, uint8_t *mask);
+void cursor_get_mono_mask(QEMUCursor *c, int transparent, uint8_t *mask);
+
+typedef void *QEMUGLContext;
+typedef struct QEMUGLParams QEMUGLParams;
+
+struct QEMUGLParams {
+    int major_ver;
+    int minor_ver;
+};
+
+typedef struct QemuDmaBuf {
+    int       fd;
+    uint32_t  width;
+    uint32_t  height;
+    uint32_t  stride;
+    uint32_t  fourcc;
+    uint64_t  modifier;
+    uint32_t  texture;
+    uint32_t  x;
+    uint32_t  y;
+    uint32_t  scanout_width;
+    uint32_t  scanout_height;
+    bool      y0_top;
+    void      *sync;
+    int       fence_fd;
+    bool      allow_fences;
+    bool      draw_submitted;
+} QemuDmaBuf;
+
+typedef struct DisplayState DisplayState;
+
+typedef struct DisplayChangeListenerOps {
+    const char *dpy_name;
+
+    /* optional */
+    void (*dpy_refresh)(DisplayChangeListener *dcl);
+
+    /* optional */
+    void (*dpy_gfx_update)(DisplayChangeListener *dcl,
+                           int x, int y, int w, int h);
+    /* optional */
+    void (*dpy_gfx_switch)(DisplayChangeListener *dcl,
+                           struct DisplaySurface *new_surface);
+    /* optional */
+    bool (*dpy_gfx_check_format)(DisplayChangeListener *dcl,
+                                 pixman_format_code_t format);
+
+    /* optional */
+    void (*dpy_text_cursor)(DisplayChangeListener *dcl,
+                            int x, int y);
+    /* optional */
+    void (*dpy_text_resize)(DisplayChangeListener *dcl,
+                            int w, int h);
+    /* optional */
+    void (*dpy_text_update)(DisplayChangeListener *dcl,
+                            int x, int y, int w, int h);
+
+    /* optional */
+    void (*dpy_mouse_set)(DisplayChangeListener *dcl,
+                          int x, int y, int on);
+    /* optional */
+    void (*dpy_cursor_define)(DisplayChangeListener *dcl,
+                              QEMUCursor *cursor);
+
+    /* required if GL */
+    QEMUGLContext (*dpy_gl_ctx_create)(DisplayChangeListener *dcl,
+                                       QEMUGLParams *params);
+    /* required if GL */
+    void (*dpy_gl_ctx_destroy)(DisplayChangeListener *dcl,
+                               QEMUGLContext ctx);
+    /* required if GL */
+    int (*dpy_gl_ctx_make_current)(DisplayChangeListener *dcl,
+                                   QEMUGLContext ctx);
+
+    /* required if GL */
+    void (*dpy_gl_scanout_disable)(DisplayChangeListener *dcl);
+    /* required if GL */
+    void (*dpy_gl_scanout_texture)(DisplayChangeListener *dcl,
+                                   uint32_t backing_id,
+                                   bool backing_y_0_top,
+                                   uint32_t backing_width,
+                                   uint32_t backing_height,
+                                   uint32_t x, uint32_t y,
+                                   uint32_t w, uint32_t h);
+    /* optional (default to true if has dpy_gl_scanout_dmabuf) */
+    bool (*dpy_has_dmabuf)(DisplayChangeListener *dcl);
+    /* optional */
+    void (*dpy_gl_scanout_dmabuf)(DisplayChangeListener *dcl,
+                                  QemuDmaBuf *dmabuf);
+    /* optional */
+    void (*dpy_gl_cursor_dmabuf)(DisplayChangeListener *dcl,
+                                 QemuDmaBuf *dmabuf, bool have_hot,
+                                 uint32_t hot_x, uint32_t hot_y);
+    /* optional */
+    void (*dpy_gl_cursor_position)(DisplayChangeListener *dcl,
+                                   uint32_t pos_x, uint32_t pos_y);
+    /* optional */
+    void (*dpy_gl_release_dmabuf)(DisplayChangeListener *dcl,
+                                  QemuDmaBuf *dmabuf);
+    /* required if GL */
+    void (*dpy_gl_update)(DisplayChangeListener *dcl,
+                          uint32_t x, uint32_t y, uint32_t w, uint32_t h);
+
+} DisplayChangeListenerOps;
+
+struct DisplayChangeListener {
+    uint64_t update_interval;
+    const DisplayChangeListenerOps *ops;
+    DisplayState *ds;
+    QemuConsole *con;
+
+    QLIST_ENTRY(DisplayChangeListener) next;
+};
+
+DisplayState *init_displaystate(void);
+DisplaySurface *qemu_create_displaysurface_from(int width, int height,
+                                                pixman_format_code_t format,
+                                                int linesize, uint8_t *data);
+DisplaySurface *qemu_create_displaysurface_pixman(pixman_image_t *image);
+DisplaySurface *qemu_create_placeholder_surface(int w, int h,
+                                                const char *msg);
+PixelFormat qemu_default_pixelformat(int bpp);
+
+DisplaySurface *qemu_create_displaysurface(int width, int height);
+void qemu_free_displaysurface(DisplaySurface *surface);
+
+static inline int is_buffer_shared(DisplaySurface *surface)
+{
+    return !(surface->flags & QEMU_ALLOCATED_FLAG);
+}
+
+static inline int is_placeholder(DisplaySurface *surface)
+{
+    return surface->flags & QEMU_PLACEHOLDER_FLAG;
+}
+
+void register_displaychangelistener(DisplayChangeListener *dcl);
+void update_displaychangelistener(DisplayChangeListener *dcl,
+                                  uint64_t interval);
+void unregister_displaychangelistener(DisplayChangeListener *dcl);
+
+bool dpy_ui_info_supported(QemuConsole *con);
+const QemuUIInfo *dpy_get_ui_info(const QemuConsole *con);
+int dpy_set_ui_info(QemuConsole *con, QemuUIInfo *info);
+
+void dpy_gfx_update(QemuConsole *con, int x, int y, int w, int h);
+void dpy_gfx_update_full(QemuConsole *con);
+void dpy_gfx_replace_surface(QemuConsole *con,
+                             DisplaySurface *surface);
+void dpy_text_cursor(QemuConsole *con, int x, int y);
+void dpy_text_update(QemuConsole *con, int x, int y, int w, int h);
+void dpy_text_resize(QemuConsole *con, int w, int h);
+void dpy_mouse_set(QemuConsole *con, int x, int y, int on);
+void dpy_cursor_define(QemuConsole *con, QEMUCursor *cursor);
+bool dpy_cursor_define_supported(QemuConsole *con);
+bool dpy_gfx_check_format(QemuConsole *con,
+                          pixman_format_code_t format);
+
+void dpy_gl_scanout_disable(QemuConsole *con);
+void dpy_gl_scanout_texture(QemuConsole *con,
+                            uint32_t backing_id, bool backing_y_0_top,
+                            uint32_t backing_width, uint32_t backing_height,
+                            uint32_t x, uint32_t y, uint32_t w, uint32_t h);
+void dpy_gl_scanout_dmabuf(QemuConsole *con,
+                           QemuDmaBuf *dmabuf);
+void dpy_gl_cursor_dmabuf(QemuConsole *con, QemuDmaBuf *dmabuf,
+                          bool have_hot, uint32_t hot_x, uint32_t hot_y);
+void dpy_gl_cursor_position(QemuConsole *con,
+                            uint32_t pos_x, uint32_t pos_y);
+void dpy_gl_release_dmabuf(QemuConsole *con,
+                           QemuDmaBuf *dmabuf);
+void dpy_gl_update(QemuConsole *con,
+                   uint32_t x, uint32_t y, uint32_t w, uint32_t h);
+
+QEMUGLContext dpy_gl_ctx_create(QemuConsole *con,
+                                QEMUGLParams *params);
+void dpy_gl_ctx_destroy(QemuConsole *con, QEMUGLContext ctx);
+int dpy_gl_ctx_make_current(QemuConsole *con, QEMUGLContext ctx);
+
+bool console_has_gl(QemuConsole *con);
+
+static inline int surface_stride(DisplaySurface *s)
+{
+    return pixman_image_get_stride(s->image);
+}
+
+static inline void *surface_data(DisplaySurface *s)
+{
+    return pixman_image_get_data(s->image);
+}
+
+static inline int surface_width(DisplaySurface *s)
+{
+    return pixman_image_get_width(s->image);
+}
+
+static inline int surface_height(DisplaySurface *s)
+{
+    return pixman_image_get_height(s->image);
+}
+
+static inline int surface_bits_per_pixel(DisplaySurface *s)
+{
+    int bits = PIXMAN_FORMAT_BPP(s->format);
+    return bits;
+}
+
+static inline int surface_bytes_per_pixel(DisplaySurface *s)
+{
+    int bits = PIXMAN_FORMAT_BPP(s->format);
+    return DIV_ROUND_UP(bits, 8);
+}
+
+static inline pixman_format_code_t surface_format(DisplaySurface *s)
+{
+    return s->format;
+}
+
+typedef uint32_t console_ch_t;
+
+static inline void console_write_ch(console_ch_t *dest, uint32_t ch)
+{
+    *dest = ch;
+}
+
+enum {
+    GRAPHIC_FLAGS_NONE     = 0,
+    /* require a console/display with GL callbacks */
+    GRAPHIC_FLAGS_GL       = 1 << 0,
+    /* require a console/display with DMABUF import */
+    GRAPHIC_FLAGS_DMABUF   = 1 << 1,
+};
+
+typedef struct GraphicHwOps {
+    int (*get_flags)(void *opaque); /* optional, default 0 */
+    void (*invalidate)(void *opaque);
+    void (*gfx_update)(void *opaque);
+    bool gfx_update_async; /* if true, calls graphic_hw_update_done() */
+    void (*text_update)(void *opaque, console_ch_t *text);
+    void (*update_interval)(void *opaque, uint64_t interval);
+    int (*ui_info)(void *opaque, uint32_t head, QemuUIInfo *info);
+    void (*gl_block)(void *opaque, bool block);
+    void (*gl_flushed)(void *opaque);
+} GraphicHwOps;
+
+QemuConsole *graphic_console_init(DeviceState *dev, uint32_t head,
+                                  const GraphicHwOps *ops,
+                                  void *opaque);
+void graphic_console_set_hwops(QemuConsole *con,
+                               const GraphicHwOps *hw_ops,
+                               void *opaque);
+void graphic_console_close(QemuConsole *con);
+
+void graphic_hw_update(QemuConsole *con);
+void graphic_hw_update_done(QemuConsole *con);
+void graphic_hw_invalidate(QemuConsole *con);
+void graphic_hw_text_update(QemuConsole *con, console_ch_t *chardata);
+void graphic_hw_gl_block(QemuConsole *con, bool block);
+void graphic_hw_gl_flushed(QemuConsole *con);
+
+void qemu_console_early_init(void);
+
+QemuConsole *qemu_console_lookup_by_index(unsigned int index);
+QemuConsole *qemu_console_lookup_by_device(DeviceState *dev, uint32_t head);
+QemuConsole *qemu_console_lookup_by_device_name(const char *device_id,
+                                                uint32_t head, Error **errp);
+QemuConsole *qemu_console_lookup_unused(void);
+bool qemu_console_is_visible(QemuConsole *con);
+bool qemu_console_is_graphic(QemuConsole *con);
+bool qemu_console_is_fixedsize(QemuConsole *con);
+bool qemu_console_is_gl_blocked(QemuConsole *con);
+char *qemu_console_get_label(QemuConsole *con);
+int qemu_console_get_index(QemuConsole *con);
+uint32_t qemu_console_get_head(QemuConsole *con);
+int qemu_console_get_width(QemuConsole *con, int fallback);
+int qemu_console_get_height(QemuConsole *con, int fallback);
+/* Return the low-level window id for the console */
+int qemu_console_get_window_id(QemuConsole *con);
+/* Set the low-level window id for the console */
+void qemu_console_set_window_id(QemuConsole *con, int window_id);
+
+void console_select(unsigned int index);
+void qemu_console_resize(QemuConsole *con, int width, int height);
+DisplaySurface *qemu_console_surface(QemuConsole *con);
+
+/* console-gl.c */
+#ifdef CONFIG_OPENGL
+bool console_gl_check_format(DisplayChangeListener *dcl,
+                             pixman_format_code_t format);
+void surface_gl_create_texture(QemuGLShader *gls,
+                               DisplaySurface *surface);
+void surface_gl_update_texture(QemuGLShader *gls,
+                               DisplaySurface *surface,
+                               int x, int y, int w, int h);
+void surface_gl_render_texture(QemuGLShader *gls,
+                               DisplaySurface *surface);
+void surface_gl_destroy_texture(QemuGLShader *gls,
+                               DisplaySurface *surface);
+void surface_gl_setup_viewport(QemuGLShader *gls,
+                               DisplaySurface *surface,
+                               int ww, int wh);
+#endif
+
+typedef struct QemuDisplay QemuDisplay;
+
+struct QemuDisplay {
+    DisplayType type;
+    void (*early_init)(DisplayOptions *opts);
+    void (*init)(DisplayState *ds, DisplayOptions *opts);
+};
+
+void qemu_display_register(QemuDisplay *ui);
+bool qemu_display_find_default(DisplayOptions *opts);
+void qemu_display_early_init(DisplayOptions *opts);
+void qemu_display_init(DisplayState *ds, DisplayOptions *opts);
+void qemu_display_help(void);
+
+/* vnc.c */
+void vnc_display_init(const char *id, Error **errp);
+void vnc_display_open(const char *id, Error **errp);
+void vnc_display_add_client(const char *id, int csock, bool skipauth);
+int vnc_display_password(const char *id, const char *password);
+int vnc_display_pw_expire(const char *id, time_t expires);
+void vnc_parse(const char *str);
+int vnc_init_func(void *opaque, QemuOpts *opts, Error **errp);
+bool vnc_display_reload_certs(const char *id,  Error **errp);
+
+/* input.c */
+int index_from_key(const char *key, size_t key_length);
+
+#ifdef CONFIG_LINUX
+/* udmabuf.c */
+int udmabuf_fd(void);
+#endif
+
+#endif