Merge remote-tracking branch 'remotes/kraxel/tags/vga-20180618-pull-request' into staging

vga: add ramfb, print virglrenderer version

# gpg: Signature made Mon 18 Jun 2018 10:57:38 BST
# gpg:                using RSA key 4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/vga-20180618-pull-request:
  Add ramfb MAINTAINERS entry
  hw/display: add standalone ramfb device
  hw/display: add ramfb, a simple boot framebuffer living in guest ram
  configure: print virglrenderer version

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

3 files changed, 160 insertions, 0 deletions

diff --git a/hw/display/Makefile.objs b/hw/display/Makefile.objs
index b5d97ab..fb8408c 100644
--- a/hw/display/Makefile.objs
+++ b/hw/display/Makefile.objs
@@ -1,3 +1,6 @@
+common-obj-y += ramfb.o
+common-obj-y += ramfb-standalone.o
+
 common-obj-$(CONFIG_ADS7846) += ads7846.o
 common-obj-$(CONFIG_VGA_CIRRUS) += cirrus_vga.o
 common-obj-$(CONFIG_G364FB) += g364fb.o
diff --git a/hw/display/ramfb-standalone.c b/hw/display/ramfb-standalone.c
new file mode 100644
index 0000000..c0d241b
--- /dev/null
+++ b/hw/display/ramfb-standalone.c
@@ -0,0 +1,62 @@
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "hw/loader.h"
+#include "hw/isa/isa.h"
+#include "hw/display/ramfb.h"
+#include "ui/console.h"
+#include "sysemu/sysemu.h"
+
+#define RAMFB(obj) OBJECT_CHECK(RAMFBStandaloneState, (obj), TYPE_RAMFB_DEVICE)
+
+typedef struct RAMFBStandaloneState {
+    SysBusDevice parent_obj;
+    QemuConsole *con;
+    RAMFBState *state;
+} RAMFBStandaloneState;
+
+static void display_update_wrapper(void *dev)
+{
+    RAMFBStandaloneState *ramfb = RAMFB(dev);
+
+    if (0 /* native driver active */) {
+        /* non-standalone device would run native display update here */;
+    } else {
+        ramfb_display_update(ramfb->con, ramfb->state);
+    }
+}
+
+static const GraphicHwOps wrapper_ops = {
+    .gfx_update = display_update_wrapper,
+};
+
+static void ramfb_realizefn(DeviceState *dev, Error **errp)
+{
+    RAMFBStandaloneState *ramfb = RAMFB(dev);
+
+    ramfb->con = graphic_console_init(dev, 0, &wrapper_ops, dev);
+    ramfb->state = ramfb_setup(errp);
+}
+
+static void ramfb_class_initfn(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
+    dc->realize = ramfb_realizefn;
+    dc->desc = "ram framebuffer standalone device";
+    dc->user_creatable = true;
+}
+
+static const TypeInfo ramfb_info = {
+    .name          = TYPE_RAMFB_DEVICE,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(RAMFBStandaloneState),
+    .class_init    = ramfb_class_initfn,
+};
+
+static void ramfb_register_types(void)
+{
+    type_register_static(&ramfb_info);
+}
+
+type_init(ramfb_register_types)
diff --git a/hw/display/ramfb.c b/hw/display/ramfb.c
new file mode 100644
index 0000000..6867bce
--- /dev/null
+++ b/hw/display/ramfb.c
@@ -0,0 +1,95 @@
+/*
+ * 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 stride, fourcc, format;
+    hwaddr 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);
+
+    fw_cfg_add_file_callback(fw_cfg, "etc/ramfb",
+                             NULL, ramfb_fw_cfg_write, s,
+                             &s->cfg, sizeof(s->cfg), false);
+    return s;
+}