2fc979cb9d
This reverts commit f79081b4b7.
Patch has broken byteorder handling: RAMFBCfg fields are in bigendian
byteorder, the reset function doesn't care so native byteorder is used
instead. Given this went unnoticed so far the feature is obviously
unused, so just revert the patch.
Cc: Hou Qiming <hqm03ster@gmail.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Message-id: 20200429115236.28709-2-kraxel@redhat.com
141 lines
3.6 KiB
C
141 lines
3.6 KiB
C
/*
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* early boot framebuffer in guest ram
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* configured using fw_cfg
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*
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* Copyright Red Hat, Inc. 2017
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*
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* Author:
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* Gerd Hoffmann <kraxel@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "hw/loader.h"
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#include "hw/display/ramfb.h"
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#include "ui/console.h"
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#include "sysemu/reset.h"
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struct QEMU_PACKED RAMFBCfg {
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uint64_t addr;
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uint32_t fourcc;
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uint32_t flags;
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uint32_t width;
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uint32_t height;
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uint32_t stride;
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};
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struct RAMFBState {
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DisplaySurface *ds;
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uint32_t width, height;
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struct RAMFBCfg cfg;
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bool locked;
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};
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static void ramfb_unmap_display_surface(pixman_image_t *image, void *unused)
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{
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void *data = pixman_image_get_data(image);
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uint32_t size = pixman_image_get_stride(image) *
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pixman_image_get_height(image);
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cpu_physical_memory_unmap(data, size, 0, 0);
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}
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static DisplaySurface *ramfb_create_display_surface(int width, int height,
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pixman_format_code_t format,
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int linesize, uint64_t addr)
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{
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DisplaySurface *surface;
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hwaddr size;
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void *data;
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if (linesize == 0) {
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linesize = width * PIXMAN_FORMAT_BPP(format) / 8;
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}
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size = (hwaddr)linesize * height;
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data = cpu_physical_memory_map(addr, &size, false);
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if (size != (hwaddr)linesize * height) {
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cpu_physical_memory_unmap(data, size, 0, 0);
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return NULL;
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}
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surface = qemu_create_displaysurface_from(width, height,
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format, linesize, data);
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pixman_image_set_destroy_function(surface->image,
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ramfb_unmap_display_surface, NULL);
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return surface;
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}
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static void ramfb_fw_cfg_write(void *dev, off_t offset, size_t len)
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{
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RAMFBState *s = dev;
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uint32_t fourcc, format, width, height;
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hwaddr stride, addr;
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width = be32_to_cpu(s->cfg.width);
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height = be32_to_cpu(s->cfg.height);
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stride = be32_to_cpu(s->cfg.stride);
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fourcc = be32_to_cpu(s->cfg.fourcc);
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addr = be64_to_cpu(s->cfg.addr);
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format = qemu_drm_format_to_pixman(fourcc);
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fprintf(stderr, "%s: %dx%d @ 0x%" PRIx64 "\n", __func__,
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width, height, addr);
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if (s->locked) {
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fprintf(stderr, "%s: resolution locked, change rejected\n", __func__);
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return;
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}
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s->locked = true;
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s->width = width;
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s->height = height;
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s->ds = ramfb_create_display_surface(s->width, s->height,
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format, stride, addr);
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}
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void ramfb_display_update(QemuConsole *con, RAMFBState *s)
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{
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if (!s->width || !s->height) {
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return;
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}
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if (s->ds) {
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dpy_gfx_replace_surface(con, s->ds);
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s->ds = NULL;
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}
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/* simple full screen update */
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dpy_gfx_update_full(con);
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}
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static void ramfb_reset(void *opaque)
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{
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RAMFBState *s = (RAMFBState *)opaque;
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s->locked = false;
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memset(&s->cfg, 0, sizeof(s->cfg));
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}
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RAMFBState *ramfb_setup(Error **errp)
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{
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FWCfgState *fw_cfg = fw_cfg_find();
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RAMFBState *s;
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if (!fw_cfg || !fw_cfg->dma_enabled) {
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error_setg(errp, "ramfb device requires fw_cfg with DMA");
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return NULL;
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}
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s = g_new0(RAMFBState, 1);
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s->locked = false;
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rom_add_vga("vgabios-ramfb.bin");
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fw_cfg_add_file_callback(fw_cfg, "etc/ramfb",
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NULL, ramfb_fw_cfg_write, s,
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&s->cfg, sizeof(s->cfg), false);
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qemu_register_reset(ramfb_reset, s);
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return s;
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}
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