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, 198 insertions, 0 deletions

diff --git a/hw/display/vga_int.h b/hw/display/vga_int.h
new file mode 100644
index 000000000..847e784ca
--- /dev/null
+++ b/hw/display/vga_int.h
@@ -0,0 +1,198 @@
+/*
+ * QEMU internal VGA defines.
+ *
+ * Copyright (c) 2003-2004 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef HW_VGA_INT_H
+#define HW_VGA_INT_H
+
+#include "exec/ioport.h"
+#include "exec/memory.h"
+#include "ui/console.h"
+
+#include "hw/display/bochs-vbe.h"
+
+#define ST01_V_RETRACE      0x08
+#define ST01_DISP_ENABLE    0x01
+
+#define CH_ATTR_SIZE (160 * 100)
+#define VGA_MAX_HEIGHT 2048
+
+struct vga_precise_retrace {
+    int64_t ticks_per_char;
+    int64_t total_chars;
+    int htotal;
+    int hstart;
+    int hend;
+    int vstart;
+    int vend;
+    int freq;
+};
+
+union vga_retrace {
+    struct vga_precise_retrace precise;
+};
+
+struct VGACommonState;
+typedef uint8_t (* vga_retrace_fn)(struct VGACommonState *s);
+typedef void (* vga_update_retrace_info_fn)(struct VGACommonState *s);
+
+typedef struct VGACommonState {
+    MemoryRegion *legacy_address_space;
+    uint8_t *vram_ptr;
+    MemoryRegion vram;
+    uint32_t vram_size;
+    uint32_t vram_size_mb; /* property */
+    uint32_t vbe_size;
+    uint32_t vbe_size_mask;
+    uint32_t latch;
+    bool has_chain4_alias;
+    MemoryRegion chain4_alias;
+    uint8_t sr_index;
+    uint8_t sr[256];
+    uint8_t sr_vbe[256];
+    uint8_t gr_index;
+    uint8_t gr[256];
+    uint8_t ar_index;
+    uint8_t ar[21];
+    int ar_flip_flop;
+    uint8_t cr_index;
+    uint8_t cr[256]; /* CRT registers */
+    uint8_t msr; /* Misc Output Register */
+    uint8_t fcr; /* Feature Control Register */
+    uint8_t st00; /* status 0 */
+    uint8_t st01; /* status 1 */
+    uint8_t dac_state;
+    uint8_t dac_sub_index;
+    uint8_t dac_read_index;
+    uint8_t dac_write_index;
+    uint8_t dac_cache[3]; /* used when writing */
+    int dac_8bit;
+    uint8_t palette[768];
+    int32_t bank_offset;
+    int (*get_bpp)(struct VGACommonState *s);
+    void (*get_offsets)(struct VGACommonState *s,
+                        uint32_t *pline_offset,
+                        uint32_t *pstart_addr,
+                        uint32_t *pline_compare);
+    void (*get_resolution)(struct VGACommonState *s,
+                        int *pwidth,
+                        int *pheight);
+    PortioList vga_port_list;
+    PortioList vbe_port_list;
+    /* bochs vbe state */
+    uint16_t vbe_index;
+    uint16_t vbe_regs[VBE_DISPI_INDEX_NB];
+    uint32_t vbe_start_addr;
+    uint32_t vbe_line_offset;
+    uint32_t vbe_bank_mask;
+    /* display refresh support */
+    QemuConsole *con;
+    uint32_t font_offsets[2];
+    int graphic_mode;
+    uint8_t shift_control;
+    uint8_t double_scan;
+    uint32_t line_offset;
+    uint32_t line_compare;
+    uint32_t start_addr;
+    uint32_t plane_updated;
+    uint32_t last_line_offset;
+    uint8_t last_cw, last_ch;
+    uint32_t last_width, last_height; /* in chars or pixels */
+    uint32_t last_scr_width, last_scr_height; /* in pixels */
+    uint32_t last_depth; /* in bits */
+    bool last_byteswap;
+    bool force_shadow;
+    uint8_t cursor_start, cursor_end;
+    bool cursor_visible_phase;
+    int64_t cursor_blink_time;
+    uint32_t cursor_offset;
+    const GraphicHwOps *hw_ops;
+    bool full_update_text;
+    bool full_update_gfx;
+    bool big_endian_fb;
+    bool default_endian_fb;
+    bool global_vmstate;
+    /* hardware mouse cursor support */
+    uint32_t invalidated_y_table[VGA_MAX_HEIGHT / 32];
+    uint32_t hw_cursor_x;
+    uint32_t hw_cursor_y;
+    void (*cursor_invalidate)(struct VGACommonState *s);
+    void (*cursor_draw_line)(struct VGACommonState *s, uint8_t *d, int y);
+    /* tell for each page if it has been updated since the last time */
+    uint32_t last_palette[256];
+    uint32_t last_ch_attr[CH_ATTR_SIZE]; /* XXX: make it dynamic */
+    /* retrace */
+    vga_retrace_fn retrace;
+    vga_update_retrace_info_fn update_retrace_info;
+    union vga_retrace retrace_info;
+    uint8_t is_vbe_vmstate;
+} VGACommonState;
+
+static inline int c6_to_8(int v)
+{
+    int b;
+    v &= 0x3f;
+    b = v & 1;
+    return (v << 2) | (b << 1) | b;
+}
+
+void vga_common_init(VGACommonState *s, Object *obj);
+void vga_init(VGACommonState *s, Object *obj, MemoryRegion *address_space,
+              MemoryRegion *address_space_io, bool init_vga_ports);
+MemoryRegion *vga_init_io(VGACommonState *s, Object *obj,
+                          const MemoryRegionPortio **vga_ports,
+                          const MemoryRegionPortio **vbe_ports);
+void vga_common_reset(VGACommonState *s);
+
+void vga_dirty_log_start(VGACommonState *s);
+void vga_dirty_log_stop(VGACommonState *s);
+
+extern const VMStateDescription vmstate_vga_common;
+uint32_t vga_ioport_read(void *opaque, uint32_t addr);
+void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val);
+uint32_t vga_mem_readb(VGACommonState *s, hwaddr addr);
+void vga_mem_writeb(VGACommonState *s, hwaddr addr, uint32_t val);
+void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2);
+
+int vga_ioport_invalid(VGACommonState *s, uint32_t addr);
+
+uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr);
+void vbe_ioport_write_index(void *opaque, uint32_t addr, uint32_t val);
+void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val);
+
+extern const uint8_t sr_mask[8];
+extern const uint8_t gr_mask[16];
+
+#define VGABIOS_FILENAME "vgabios.bin"
+#define VGABIOS_CIRRUS_FILENAME "vgabios-cirrus.bin"
+
+extern const MemoryRegionOps vga_mem_ops;
+
+/* vga-pci.c */
+void pci_std_vga_mmio_region_init(VGACommonState *s,
+                                  Object *owner,
+                                  MemoryRegion *parent,
+                                  MemoryRegion *subs,
+                                  bool qext, bool edid);
+
+#endif