1995b3017SGerd Hoffmann /*
2995b3017SGerd Hoffmann * early boot framebuffer in guest ram
3995b3017SGerd Hoffmann * configured using fw_cfg
4995b3017SGerd Hoffmann *
5995b3017SGerd Hoffmann * Copyright Red Hat, Inc. 2017
6995b3017SGerd Hoffmann *
7995b3017SGerd Hoffmann * Author:
8995b3017SGerd Hoffmann * Gerd Hoffmann <kraxel@redhat.com>
9995b3017SGerd Hoffmann *
10995b3017SGerd Hoffmann * This work is licensed under the terms of the GNU GPL, version 2 or later.
11995b3017SGerd Hoffmann * See the COPYING file in the top-level directory.
12995b3017SGerd Hoffmann */
1371e8a915SMarkus Armbruster
14995b3017SGerd Hoffmann #include "qemu/osdep.h"
15995b3017SGerd Hoffmann #include "qapi/error.h"
16995b3017SGerd Hoffmann #include "hw/loader.h"
17995b3017SGerd Hoffmann #include "hw/display/ramfb.h"
18819c83e2SGerd Hoffmann #include "hw/display/bochs-vbe.h" /* for limits */
19995b3017SGerd Hoffmann #include "ui/console.h"
2071e8a915SMarkus Armbruster #include "sysemu/reset.h"
21995b3017SGerd Hoffmann
22995b3017SGerd Hoffmann struct QEMU_PACKED RAMFBCfg {
23995b3017SGerd Hoffmann uint64_t addr;
24995b3017SGerd Hoffmann uint32_t fourcc;
25995b3017SGerd Hoffmann uint32_t flags;
26995b3017SGerd Hoffmann uint32_t width;
27995b3017SGerd Hoffmann uint32_t height;
28995b3017SGerd Hoffmann uint32_t stride;
29995b3017SGerd Hoffmann };
30995b3017SGerd Hoffmann
31303c33e6SMarc-André Lureau typedef struct RAMFBCfg RAMFBCfg;
32303c33e6SMarc-André Lureau
33995b3017SGerd Hoffmann struct RAMFBState {
34995b3017SGerd Hoffmann DisplaySurface *ds;
35995b3017SGerd Hoffmann uint32_t width, height;
36995b3017SGerd Hoffmann struct RAMFBCfg cfg;
37995b3017SGerd Hoffmann };
38995b3017SGerd Hoffmann
ramfb_unmap_display_surface(pixman_image_t * image,void * unused)39d57f252aSHou Qiming static void ramfb_unmap_display_surface(pixman_image_t *image, void *unused)
40d57f252aSHou Qiming {
41d57f252aSHou Qiming void *data = pixman_image_get_data(image);
42d57f252aSHou Qiming uint32_t size = pixman_image_get_stride(image) *
43d57f252aSHou Qiming pixman_image_get_height(image);
44d57f252aSHou Qiming cpu_physical_memory_unmap(data, size, 0, 0);
45d57f252aSHou Qiming }
46d57f252aSHou Qiming
ramfb_create_display_surface(int width,int height,pixman_format_code_t format,hwaddr stride,hwaddr addr)47d57f252aSHou Qiming static DisplaySurface *ramfb_create_display_surface(int width, int height,
48d57f252aSHou Qiming pixman_format_code_t format,
493fcf15dfSGerd Hoffmann hwaddr stride, hwaddr addr)
50d57f252aSHou Qiming {
51d57f252aSHou Qiming DisplaySurface *surface;
523fcf15dfSGerd Hoffmann hwaddr size, mapsize, linesize;
53d57f252aSHou Qiming void *data;
54d57f252aSHou Qiming
55819c83e2SGerd Hoffmann if (width < 16 || width > VBE_DISPI_MAX_XRES ||
56819c83e2SGerd Hoffmann height < 16 || height > VBE_DISPI_MAX_YRES ||
57819c83e2SGerd Hoffmann format == 0 /* unknown format */)
58819c83e2SGerd Hoffmann return NULL;
59819c83e2SGerd Hoffmann
60d57f252aSHou Qiming linesize = width * PIXMAN_FORMAT_BPP(format) / 8;
613fcf15dfSGerd Hoffmann if (stride == 0) {
623fcf15dfSGerd Hoffmann stride = linesize;
63d57f252aSHou Qiming }
64d57f252aSHou Qiming
653fcf15dfSGerd Hoffmann mapsize = size = stride * (height - 1) + linesize;
663fcf15dfSGerd Hoffmann data = cpu_physical_memory_map(addr, &mapsize, false);
673fcf15dfSGerd Hoffmann if (size != mapsize) {
683fcf15dfSGerd Hoffmann cpu_physical_memory_unmap(data, mapsize, 0, 0);
69d57f252aSHou Qiming return NULL;
70d57f252aSHou Qiming }
71d57f252aSHou Qiming
72d57f252aSHou Qiming surface = qemu_create_displaysurface_from(width, height,
733fcf15dfSGerd Hoffmann format, stride, data);
74d57f252aSHou Qiming pixman_image_set_destroy_function(surface->image,
75d57f252aSHou Qiming ramfb_unmap_display_surface, NULL);
76d57f252aSHou Qiming
77d57f252aSHou Qiming return surface;
78d57f252aSHou Qiming }
79d57f252aSHou Qiming
ramfb_fw_cfg_write(void * dev,off_t offset,size_t len)80995b3017SGerd Hoffmann static void ramfb_fw_cfg_write(void *dev, off_t offset, size_t len)
81995b3017SGerd Hoffmann {
82995b3017SGerd Hoffmann RAMFBState *s = dev;
8319aaee2aSGerd Hoffmann DisplaySurface *surface;
8419aaee2aSGerd Hoffmann uint32_t fourcc, format, width, height;
85d57f252aSHou Qiming hwaddr stride, addr;
86995b3017SGerd Hoffmann
8719aaee2aSGerd Hoffmann width = be32_to_cpu(s->cfg.width);
8819aaee2aSGerd Hoffmann height = be32_to_cpu(s->cfg.height);
89995b3017SGerd Hoffmann stride = be32_to_cpu(s->cfg.stride);
90995b3017SGerd Hoffmann fourcc = be32_to_cpu(s->cfg.fourcc);
91995b3017SGerd Hoffmann addr = be64_to_cpu(s->cfg.addr);
92995b3017SGerd Hoffmann format = qemu_drm_format_to_pixman(fourcc);
93995b3017SGerd Hoffmann
9419aaee2aSGerd Hoffmann surface = ramfb_create_display_surface(width, height,
95d57f252aSHou Qiming format, stride, addr);
9619aaee2aSGerd Hoffmann if (!surface) {
9719aaee2aSGerd Hoffmann return;
9819aaee2aSGerd Hoffmann }
9919aaee2aSGerd Hoffmann
10019aaee2aSGerd Hoffmann s->width = width;
10119aaee2aSGerd Hoffmann s->height = height;
102e0288a77SLaszlo Ersek qemu_free_displaysurface(s->ds);
10319aaee2aSGerd Hoffmann s->ds = surface;
104995b3017SGerd Hoffmann }
105995b3017SGerd Hoffmann
ramfb_display_update(QemuConsole * con,RAMFBState * s)106995b3017SGerd Hoffmann void ramfb_display_update(QemuConsole *con, RAMFBState *s)
107995b3017SGerd Hoffmann {
108995b3017SGerd Hoffmann if (!s->width || !s->height) {
109995b3017SGerd Hoffmann return;
110995b3017SGerd Hoffmann }
111995b3017SGerd Hoffmann
112995b3017SGerd Hoffmann if (s->ds) {
113995b3017SGerd Hoffmann dpy_gfx_replace_surface(con, s->ds);
114995b3017SGerd Hoffmann s->ds = NULL;
115995b3017SGerd Hoffmann }
116995b3017SGerd Hoffmann
117995b3017SGerd Hoffmann /* simple full screen update */
118995b3017SGerd Hoffmann dpy_gfx_update_full(con);
119995b3017SGerd Hoffmann }
120995b3017SGerd Hoffmann
ramfb_post_load(void * opaque,int version_id)121303c33e6SMarc-André Lureau static int ramfb_post_load(void *opaque, int version_id)
122303c33e6SMarc-André Lureau {
123303c33e6SMarc-André Lureau ramfb_fw_cfg_write(opaque, 0, 0);
124303c33e6SMarc-André Lureau return 0;
125303c33e6SMarc-André Lureau }
126303c33e6SMarc-André Lureau
127303c33e6SMarc-André Lureau const VMStateDescription ramfb_vmstate = {
128303c33e6SMarc-André Lureau .name = "ramfb",
129303c33e6SMarc-André Lureau .version_id = 1,
130303c33e6SMarc-André Lureau .minimum_version_id = 1,
131303c33e6SMarc-André Lureau .post_load = ramfb_post_load,
132*f0613160SRichard Henderson .fields = (const VMStateField[]) {
133303c33e6SMarc-André Lureau VMSTATE_BUFFER_UNSAFE(cfg, RAMFBState, 0, sizeof(RAMFBCfg)),
134303c33e6SMarc-André Lureau VMSTATE_END_OF_LIST()
135303c33e6SMarc-André Lureau }
136303c33e6SMarc-André Lureau };
137303c33e6SMarc-André Lureau
ramfb_setup(Error ** errp)1382fc979cbSGerd Hoffmann RAMFBState *ramfb_setup(Error **errp)
139995b3017SGerd Hoffmann {
140995b3017SGerd Hoffmann FWCfgState *fw_cfg = fw_cfg_find();
141995b3017SGerd Hoffmann RAMFBState *s;
142995b3017SGerd Hoffmann
143995b3017SGerd Hoffmann if (!fw_cfg || !fw_cfg->dma_enabled) {
144995b3017SGerd Hoffmann error_setg(errp, "ramfb device requires fw_cfg with DMA");
145995b3017SGerd Hoffmann return NULL;
146995b3017SGerd Hoffmann }
147995b3017SGerd Hoffmann
148995b3017SGerd Hoffmann s = g_new0(RAMFBState, 1);
149995b3017SGerd Hoffmann
1509f5d9c19SGerd Hoffmann rom_add_vga("vgabios-ramfb.bin");
151995b3017SGerd Hoffmann fw_cfg_add_file_callback(fw_cfg, "etc/ramfb",
152995b3017SGerd Hoffmann NULL, ramfb_fw_cfg_write, s,
153995b3017SGerd Hoffmann &s->cfg, sizeof(s->cfg), false);
154995b3017SGerd Hoffmann return s;
155995b3017SGerd Hoffmann }
156