97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
/*
|
|
* early boot framebuffer in guest ram
|
|
* configured using fw_cfg
|
|
*
|
|
* Copyright Red Hat, Inc. 2017
|
|
*
|
|
* Author:
|
|
* Gerd Hoffmann <kraxel@redhat.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*/
|
|
#include "qemu/osdep.h"
|
|
#include "qapi/error.h"
|
|
#include "hw/loader.h"
|
|
#include "hw/display/ramfb.h"
|
|
#include "ui/console.h"
|
|
#include "sysemu/sysemu.h"
|
|
|
|
struct QEMU_PACKED RAMFBCfg {
|
|
uint64_t addr;
|
|
uint32_t fourcc;
|
|
uint32_t flags;
|
|
uint32_t width;
|
|
uint32_t height;
|
|
uint32_t stride;
|
|
};
|
|
|
|
struct RAMFBState {
|
|
DisplaySurface *ds;
|
|
uint32_t width, height;
|
|
struct RAMFBCfg cfg;
|
|
};
|
|
|
|
static void ramfb_fw_cfg_write(void *dev, off_t offset, size_t len)
|
|
{
|
|
RAMFBState *s = dev;
|
|
void *framebuffer;
|
|
uint32_t fourcc, format;
|
|
hwaddr stride, addr, length;
|
|
|
|
s->width = be32_to_cpu(s->cfg.width);
|
|
s->height = be32_to_cpu(s->cfg.height);
|
|
stride = be32_to_cpu(s->cfg.stride);
|
|
fourcc = be32_to_cpu(s->cfg.fourcc);
|
|
addr = be64_to_cpu(s->cfg.addr);
|
|
length = stride * s->height;
|
|
format = qemu_drm_format_to_pixman(fourcc);
|
|
|
|
fprintf(stderr, "%s: %dx%d @ 0x%" PRIx64 "\n", __func__,
|
|
s->width, s->height, addr);
|
|
framebuffer = address_space_map(&address_space_memory,
|
|
addr, &length, false,
|
|
MEMTXATTRS_UNSPECIFIED);
|
|
if (!framebuffer || length < stride * s->height) {
|
|
s->width = 0;
|
|
s->height = 0;
|
|
return;
|
|
}
|
|
s->ds = qemu_create_displaysurface_from(s->width, s->height,
|
|
format, stride, framebuffer);
|
|
}
|
|
|
|
void ramfb_display_update(QemuConsole *con, RAMFBState *s)
|
|
{
|
|
if (!s->width || !s->height) {
|
|
return;
|
|
}
|
|
|
|
if (s->ds) {
|
|
dpy_gfx_replace_surface(con, s->ds);
|
|
s->ds = NULL;
|
|
}
|
|
|
|
/* simple full screen update */
|
|
dpy_gfx_update_full(con);
|
|
}
|
|
|
|
RAMFBState *ramfb_setup(Error **errp)
|
|
{
|
|
FWCfgState *fw_cfg = fw_cfg_find();
|
|
RAMFBState *s;
|
|
|
|
if (!fw_cfg || !fw_cfg->dma_enabled) {
|
|
error_setg(errp, "ramfb device requires fw_cfg with DMA");
|
|
return NULL;
|
|
}
|
|
|
|
s = g_new0(RAMFBState, 1);
|
|
|
|
rom_add_vga("vgabios-ramfb.bin");
|
|
fw_cfg_add_file_callback(fw_cfg, "etc/ramfb",
|
|
NULL, ramfb_fw_cfg_write, s,
|
|
&s->cfg, sizeof(s->cfg), false);
|
|
return s;
|
|
}
|