[PULL 00/24] Vga ui 20210205 patches

[PULL 00/24] Vga ui 20210205 patches

[Gerd Hoffmann]

The following changes since commit db754f8ccaf2f073c9aed46a4389e9c0c2080399:

  Merge remote-tracking branch 'remotes/rth-gitlab/tags/pull-tcg-20210202' in=
to staging (2021-02-03 19:35:57 +0000)

are available in the Git repository at:

  git://git.kraxel.org/qemu tags/vga-ui-20210205-pull-request

for you to fetch changes up to 73240f104dd0169b0637e46fae3c2c39cdfb2eb9:

  tests: add some virtio-gpu & vhost-user-gpu acceptance test (2021-02-04 15:=
58:54 +0100)

----------------------------------------------------------------
ui+virtio-gpu: opengl cleanups and fixes.
qxl+spice: bugfixes

----------------------------------------------------------------

Alex Chen (1):
  hw/display/qxl: Fix bad printf format specifiers

Marc-Andr=C3=A9 Lureau (23):
  qxl: set qxl.ssd.dcl.con on secondary devices
  qxl: also notify the rendering is done when skipping it
  spice: delay starting until display are initialized
  vhost-user-gpu: check backend for EDID support
  vhost-user-gpu: handle vhost-user-gpu features in a callback
  vhost-user-gpu: use an extandable state enum for commands
  vhost-user-gpu: handle display-info in a callback
  ui: remove extra #ifdef CONFIG_OPENGL
  ui: remove gl_ctx_get_current
  ui: add gd_gl_area_scanout_disable
  ui: annotate DCLOps callback requirements
  ui: remove console_has_gl_dmabuf()
  vhost-user-gpu: add a configuration flag for dmabuf usage
  ui: add an optional get_flags callback to GraphicHwOps
  ui: add a DCLOps callback to check dmabuf support
  ui: check hw requirements during DCL registration
  ui: add qemu_egl_has_dmabuf helper
  ui: check gtk-egl dmabuf support
  ui: add egl dmabuf import to gtkglarea
  virtio-gpu: avoid re-entering cmdq processing
  display/ui: add a callback to indicate GL state is flushed
  chardev: check if the chardev is registered for yanking
  tests: add some virtio-gpu & vhost-user-gpu acceptance test

 tests/acceptance/virtio-gpu.py          | 161 ++++++++++++++++++++++++
 contrib/vhost-user-gpu/vugpu.h          |  10 +-
 include/hw/virtio/virtio-gpu.h          |   6 +-
 include/ui/console.h                    |  35 +++++-
 include/ui/egl-context.h                |   1 -
 include/ui/egl-helpers.h                |   1 +
 include/ui/gtk.h                        |   4 +
 include/ui/qemu-spice.h                 |   1 +
 include/ui/sdl2.h                       |   1 -
 chardev/char-socket.c                   |  53 +++++---
 contrib/vhost-user-gpu/vhost-user-gpu.c |  80 ++++++++----
 contrib/vhost-user-gpu/virgl.c          |   2 +-
 hw/display/qxl-logger.c                 |   4 +-
 hw/display/qxl-render.c                 |   1 +
 hw/display/qxl.c                        |   3 +-
 hw/display/vhost-user-gpu.c             |  17 +--
 hw/display/virtio-gpu-base.c            |  31 ++++-
 hw/display/virtio-gpu.c                 |   9 +-
 hw/display/virtio-vga.c                 |  20 +++
 hw/vfio/display.c                       |   6 +
 ui/console.c                            |  64 +++++++---
 ui/egl-context.c                        |   5 -
 ui/egl-headless.c                       |   1 -
 ui/egl-helpers.c                        |  10 ++
 ui/gtk-egl.c                            |   3 +
 ui/gtk-gl-area.c                        |  28 +++++
 ui/gtk.c                                |  43 +++++--
 ui/sdl2-gl.c                            |  10 +-
 ui/sdl2.c                               |   1 -
 ui/spice-core.c                         |   9 +-
 ui/spice-display.c                      |   4 +-
 31 files changed, 518 insertions(+), 106 deletions(-)
 create mode 100644 tests/acceptance/virtio-gpu.py

--=20
2.29.2

[PULL 01/24] hw/display/qxl: Fix bad printf format specifiers

[Gerd Hoffmann]

From: Alex Chen <alex.chen@huawei.com>

We should use printf format specifier "%u" instead of "%d" for
argument of type "unsigned int".

Reported-by: Euler Robot <euler.robot@huawei.com>
Signed-off-by: Alex Chen <alex.chen@huawei.com>
Message-id: 20201119025851.56487-1-alex.chen@huawei.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/display/qxl-logger.c | 4 ++--
 hw/display/qxl.c        | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/hw/display/qxl-logger.c b/hw/display/qxl-logger.c
index c15175bce322..68bfa4756802 100644
--- a/hw/display/qxl-logger.c
+++ b/hw/display/qxl-logger.c
@@ -189,7 +189,7 @@ static void qxl_log_cmd_surface(PCIQXLDevice *qxl, QXLSurfaceCmd *cmd)
             qxl_name(qxl_surface_cmd, cmd->type),
             cmd->surface_id);
     if (cmd->type == QXL_SURFACE_CMD_CREATE) {
-        fprintf(stderr, " size %dx%d stride %d format %s (count %d, max %d)",
+        fprintf(stderr, " size %dx%d stride %d format %s (count %u, max %u)",
                 cmd->u.surface_create.width,
                 cmd->u.surface_create.height,
                 cmd->u.surface_create.stride,
@@ -197,7 +197,7 @@ static void qxl_log_cmd_surface(PCIQXLDevice *qxl, QXLSurfaceCmd *cmd)
                 qxl->guest_surfaces.count, qxl->guest_surfaces.max);
     }
     if (cmd->type == QXL_SURFACE_CMD_DESTROY) {
-        fprintf(stderr, " (count %d)", qxl->guest_surfaces.count);
+        fprintf(stderr, " (count %u)", qxl->guest_surfaces.count);
     }
 }
 
diff --git a/hw/display/qxl.c b/hw/display/qxl.c
index 431c1070967a..874bb8ad9e30 100644
--- a/hw/display/qxl.c
+++ b/hw/display/qxl.c
@@ -944,7 +944,7 @@ static void interface_async_complete_io(PCIQXLDevice *qxl, QXLCookie *cookie)
         qxl_spice_destroy_surface_wait_complete(qxl, cookie->u.surface_id);
         break;
     default:
-        fprintf(stderr, "qxl: %s: unexpected current_async %d\n", __func__,
+        fprintf(stderr, "qxl: %s: unexpected current_async %u\n", __func__,
                 current_async);
     }
     qxl_send_events(qxl, QXL_INTERRUPT_IO_CMD);
-- 
2.29.2

[PULL 02/24] qxl: set qxl.ssd.dcl.con on secondary devices

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

On secondary QXL devices, the console is only set on qxl.vga.con. But
graphic_hw_update_done() is called with qxl.ssd.dcl.con.

Like for primary QXL devices, set qxl.sdd.dcl.con = qxl.vga.con.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210201201422.446552-2-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/display/qxl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/display/qxl.c b/hw/display/qxl.c
index 874bb8ad9e30..6784d32920c5 100644
--- a/hw/display/qxl.c
+++ b/hw/display/qxl.c
@@ -2266,6 +2266,7 @@ static void qxl_realize_secondary(PCIDevice *dev, Error **errp)
                            qxl->vga.vram_size, &error_fatal);
     qxl->vga.vram_ptr = memory_region_get_ram_ptr(&qxl->vga.vram);
     qxl->vga.con = graphic_console_init(DEVICE(dev), 0, &qxl_ops, qxl);
+    qxl->ssd.dcl.con = qxl->vga.con;
     qxl->id = qemu_console_get_index(qxl->vga.con); /* == channel_id */
 
     qxl_realize_common(qxl, errp);
-- 
2.29.2

[PULL 03/24] qxl: also notify the rendering is done when skipping it

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Asynchronous handlers may be waiting for the graphic_hw_update_done() to
be called in this case too.

Fixes: 4d6316218 ("console: add graphic_hw_update_done()")
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210201201422.446552-3-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/display/qxl-render.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/display/qxl-render.c b/hw/display/qxl-render.c
index 3ce2e57b8feb..d28849b12176 100644
--- a/hw/display/qxl-render.c
+++ b/hw/display/qxl-render.c
@@ -181,6 +181,7 @@ void qxl_render_update(PCIQXLDevice *qxl)
         qxl->mode == QXL_MODE_UNDEFINED) {
         qxl_render_update_area_unlocked(qxl);
         qemu_mutex_unlock(&qxl->ssd.lock);
+        graphic_hw_update_done(qxl->ssd.dcl.con);
         return;
     }
 
-- 
2.29.2

[PULL 04/24] spice: delay starting until display are initialized

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

QEMU used to run qemu_spice.display_init() before vm_start(), and
QXL/display interfaces where started then. Now, vm_start() happens
before QXL/display interfaces are added and Spice server doesn't
automatically start them in this case (fixed in spice git)

Fixes Spice regression introduced after 5.2, with refactoring commits
b4e1a34211 ("vl: remove separate preconfig main_loop") and
facf7c60ee ("vl: initialize displays _after_ exiting preconfiguration"),
probably others.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210129152351.161971-1-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/ui/qemu-spice.h | 1 +
 ui/spice-core.c         | 9 ++++++++-
 ui/spice-display.c      | 2 ++
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/include/ui/qemu-spice.h b/include/ui/qemu-spice.h
index 2beb7929728c..71ecd6cfd106 100644
--- a/include/ui/qemu-spice.h
+++ b/include/ui/qemu-spice.h
@@ -28,6 +28,7 @@
 
 void qemu_spice_input_init(void);
 void qemu_spice_display_init(void);
+void qemu_spice_display_init_done(void);
 bool qemu_spice_have_display_interface(QemuConsole *con);
 int qemu_spice_add_display_interface(QXLInstance *qxlin, QemuConsole *con);
 int qemu_spice_migrate_info(const char *hostname, int port, int tls_port,
diff --git a/ui/spice-core.c b/ui/spice-core.c
index 514c0f975443..beee932f5546 100644
--- a/ui/spice-core.c
+++ b/ui/spice-core.c
@@ -625,6 +625,14 @@ static void vm_change_state_handler(void *opaque, int running,
     }
 }
 
+void qemu_spice_display_init_done(void)
+{
+    if (runstate_is_running()) {
+        qemu_spice_display_start();
+    }
+    qemu_add_vm_change_state_handler(vm_change_state_handler, NULL);
+}
+
 static void qemu_spice_init(void)
 {
     QemuOpts *opts = QTAILQ_FIRST(&qemu_spice_opts.head);
@@ -796,7 +804,6 @@ static void qemu_spice_init(void)
 
     qemu_spice_input_init();
 
-    qemu_add_vm_change_state_handler(vm_change_state_handler, NULL);
     qemu_spice_display_stop();
 
     g_free(x509_key_file);
diff --git a/ui/spice-display.c b/ui/spice-display.c
index 0178d5766d2c..3d3e3bcb2246 100644
--- a/ui/spice-display.c
+++ b/ui/spice-display.c
@@ -1188,4 +1188,6 @@ void qemu_spice_display_init(void)
         }
         qemu_spice_display_init_one(con);
     }
+
+    qemu_spice_display_init_done();
 }
-- 
2.29.2

[PULL 05/24] vhost-user-gpu: check backend for EDID support

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

EDID has been enabled by default, but the backend may not implement
it (such as the contrib backend). This results in extra warnings and
potentially other issues in the guest.

The option shouldn't probably have been added to VIRTIO_GPU_BASE, but
it's a bit too late now, report an error and disable EDID when it's
not available.

Fixes: 0a7196625 ("edid: flip the default to enabled")

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-2-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/display/vhost-user-gpu.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hw/display/vhost-user-gpu.c b/hw/display/vhost-user-gpu.c
index 51f1747c4a41..55b0ed15f250 100644
--- a/hw/display/vhost-user-gpu.c
+++ b/hw/display/vhost-user-gpu.c
@@ -555,6 +555,12 @@ vhost_user_gpu_device_realize(DeviceState *qdev, Error **errp)
     if (virtio_has_feature(g->vhost->dev.features, VIRTIO_GPU_F_VIRGL)) {
         g->parent_obj.conf.flags |= 1 << VIRTIO_GPU_FLAG_VIRGL_ENABLED;
     }
+    if (virtio_has_feature(g->vhost->dev.features, VIRTIO_GPU_F_EDID)) {
+        g->parent_obj.conf.flags |= 1 << VIRTIO_GPU_FLAG_EDID_ENABLED;
+    } else {
+        error_report("EDID requested but the backend doesn't support it.");
+        g->parent_obj.conf.flags &= ~(1 << VIRTIO_GPU_FLAG_EDID_ENABLED);
+    }
 
     if (!virtio_gpu_base_device_realize(qdev, NULL, NULL, errp)) {
         return;
-- 
2.29.2

[PULL 06/24] vhost-user-gpu: handle vhost-user-gpu features in a callback

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Fixes a deadlock where the backend calls QEMU, while QEMU also calls the
backend simultaneously, both ends waiting for each other.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-3-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 contrib/vhost-user-gpu/vugpu.h          |  2 +-
 contrib/vhost-user-gpu/vhost-user-gpu.c | 37 ++++++++++++++++++-------
 2 files changed, 28 insertions(+), 11 deletions(-)

diff --git a/contrib/vhost-user-gpu/vugpu.h b/contrib/vhost-user-gpu/vugpu.h
index ad664c4df853..86f3ac86aa33 100644
--- a/contrib/vhost-user-gpu/vugpu.h
+++ b/contrib/vhost-user-gpu/vugpu.h
@@ -118,7 +118,7 @@ typedef struct VuGpu {
     int sock_fd;
     int drm_rnode_fd;
     GSource *renderer_source;
-    guint wait_ok;
+    guint wait_in;
 
     bool virgl;
     bool virgl_inited;
diff --git a/contrib/vhost-user-gpu/vhost-user-gpu.c b/contrib/vhost-user-gpu/vhost-user-gpu.c
index f445ef28ec06..85c16404fb38 100644
--- a/contrib/vhost-user-gpu/vhost-user-gpu.c
+++ b/contrib/vhost-user-gpu/vhost-user-gpu.c
@@ -124,7 +124,7 @@ source_wait_cb(gint fd, GIOCondition condition, gpointer user_data)
     }
 
     /* resume */
-    g->wait_ok = 0;
+    g->wait_in = 0;
     vg_handle_ctrl(&g->dev.parent, 0);
 
     return G_SOURCE_REMOVE;
@@ -133,8 +133,8 @@ source_wait_cb(gint fd, GIOCondition condition, gpointer user_data)
 void
 vg_wait_ok(VuGpu *g)
 {
-    assert(g->wait_ok == 0);
-    g->wait_ok = g_unix_fd_add(g->sock_fd, G_IO_IN | G_IO_HUP,
+    assert(g->wait_in == 0);
+    g->wait_in = g_unix_fd_add(g->sock_fd, G_IO_IN | G_IO_HUP,
                                source_wait_cb, g);
 }
 
@@ -270,7 +270,7 @@ vg_get_display_info(VuGpu *vg, struct virtio_gpu_ctrl_command *cmd)
         .size = 0,
     };
 
-    assert(vg->wait_ok == 0);
+    assert(vg->wait_in == 0);
 
     vg_send_msg(vg, &msg, -1);
     if (!vg_recv_msg(vg, msg.request, sizeof(dpy_info), &dpy_info)) {
@@ -815,7 +815,7 @@ vg_handle_ctrl(VuDev *dev, int qidx)
     size_t len;
 
     for (;;) {
-        if (vg->wait_ok != 0) {
+        if (vg->wait_in != 0) {
             return;
         }
 
@@ -969,18 +969,17 @@ vg_queue_set_started(VuDev *dev, int qidx, bool started)
     }
 }
 
-static void
-set_gpu_protocol_features(VuGpu *g)
+static gboolean
+protocol_features_cb(gint fd, GIOCondition condition, gpointer user_data)
 {
+    VuGpu *g = user_data;
     uint64_t u64;
     VhostUserGpuMsg msg = {
         .request = VHOST_USER_GPU_GET_PROTOCOL_FEATURES
     };
 
-    assert(g->wait_ok == 0);
-    vg_send_msg(g, &msg, -1);
     if (!vg_recv_msg(g, msg.request, sizeof(u64), &u64)) {
-        return;
+        return G_SOURCE_CONTINUE;
     }
 
     msg = (VhostUserGpuMsg) {
@@ -989,6 +988,24 @@ set_gpu_protocol_features(VuGpu *g)
         .payload.u64 = 0
     };
     vg_send_msg(g, &msg, -1);
+
+    g->wait_in = 0;
+    vg_handle_ctrl(&g->dev.parent, 0);
+
+    return G_SOURCE_REMOVE;
+}
+
+static void
+set_gpu_protocol_features(VuGpu *g)
+{
+    VhostUserGpuMsg msg = {
+        .request = VHOST_USER_GPU_GET_PROTOCOL_FEATURES
+    };
+
+    vg_send_msg(g, &msg, -1);
+    assert(g->wait_in == 0);
+    g->wait_in = g_unix_fd_add(g->sock_fd, G_IO_IN | G_IO_HUP,
+                               protocol_features_cb, g);
 }
 
 static int
-- 
2.29.2

[PULL 07/24] vhost-user-gpu: use an extandable state enum for commands

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Introduce a pending state for commands which aren't finished yet, but
are being handled. See following patch.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210204105232.834642-4-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 contrib/vhost-user-gpu/vugpu.h          | 8 +++++++-
 contrib/vhost-user-gpu/vhost-user-gpu.c | 8 ++++----
 contrib/vhost-user-gpu/virgl.c          | 2 +-
 3 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/contrib/vhost-user-gpu/vugpu.h b/contrib/vhost-user-gpu/vugpu.h
index 86f3ac86aa33..04d56158123d 100644
--- a/contrib/vhost-user-gpu/vugpu.h
+++ b/contrib/vhost-user-gpu/vugpu.h
@@ -129,12 +129,18 @@ typedef struct VuGpu {
     QTAILQ_HEAD(, virtio_gpu_ctrl_command) fenceq;
 } VuGpu;
 
+enum {
+    VG_CMD_STATE_NEW,
+    VG_CMD_STATE_PENDING,
+    VG_CMD_STATE_FINISHED,
+};
+
 struct virtio_gpu_ctrl_command {
     VuVirtqElement elem;
     VuVirtq *vq;
     struct virtio_gpu_ctrl_hdr cmd_hdr;
     uint32_t error;
-    bool finished;
+    int state;
     QTAILQ_ENTRY(virtio_gpu_ctrl_command) next;
 };
 
diff --git a/contrib/vhost-user-gpu/vhost-user-gpu.c b/contrib/vhost-user-gpu/vhost-user-gpu.c
index 85c16404fb38..7dcc02966ca9 100644
--- a/contrib/vhost-user-gpu/vhost-user-gpu.c
+++ b/contrib/vhost-user-gpu/vhost-user-gpu.c
@@ -246,7 +246,7 @@ vg_ctrl_response(VuGpu *g,
     }
     vu_queue_push(&g->dev.parent, cmd->vq, &cmd->elem, s);
     vu_queue_notify(&g->dev.parent, cmd->vq);
-    cmd->finished = true;
+    cmd->state = VG_CMD_STATE_FINISHED;
 }
 
 void
@@ -800,7 +800,7 @@ vg_process_cmd(VuGpu *vg, struct virtio_gpu_ctrl_command *cmd)
         cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
         break;
     }
-    if (!cmd->finished) {
+    if (cmd->state == VG_CMD_STATE_NEW) {
         vg_ctrl_response_nodata(vg, cmd, cmd->error ? cmd->error :
                                 VIRTIO_GPU_RESP_OK_NODATA);
     }
@@ -825,7 +825,7 @@ vg_handle_ctrl(VuDev *dev, int qidx)
         }
         cmd->vq = vq;
         cmd->error = 0;
-        cmd->finished = false;
+        cmd->state = VG_CMD_STATE_NEW;
 
         len = iov_to_buf(cmd->elem.out_sg, cmd->elem.out_num,
                          0, &cmd->cmd_hdr, sizeof(cmd->cmd_hdr));
@@ -844,7 +844,7 @@ vg_handle_ctrl(VuDev *dev, int qidx)
             vg_process_cmd(vg, cmd);
         }
 
-        if (!cmd->finished) {
+        if (cmd->state != VG_CMD_STATE_FINISHED) {
             QTAILQ_INSERT_TAIL(&vg->fenceq, cmd, next);
             vg->inflight++;
         } else {
diff --git a/contrib/vhost-user-gpu/virgl.c b/contrib/vhost-user-gpu/virgl.c
index e6472780529b..8bb3c563d975 100644
--- a/contrib/vhost-user-gpu/virgl.c
+++ b/contrib/vhost-user-gpu/virgl.c
@@ -482,7 +482,7 @@ void vg_virgl_process_cmd(VuGpu *g, struct virtio_gpu_ctrl_command *cmd)
         break;
     }
 
-    if (cmd->finished) {
+    if (cmd->state != VG_CMD_STATE_NEW) {
         return;
     }
 
-- 
2.29.2

[PULL 08/24] vhost-user-gpu: handle display-info in a callback

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Fixes a deadlock where the backend calls QEMU, while QEMU also calls the
backend simultaneously, both ends waiting for each other.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-5-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 contrib/vhost-user-gpu/vhost-user-gpu.c | 35 ++++++++++++++++++++-----
 1 file changed, 28 insertions(+), 7 deletions(-)

diff --git a/contrib/vhost-user-gpu/vhost-user-gpu.c b/contrib/vhost-user-gpu/vhost-user-gpu.c
index 7dcc02966ca9..b27990ffdbc0 100644
--- a/contrib/vhost-user-gpu/vhost-user-gpu.c
+++ b/contrib/vhost-user-gpu/vhost-user-gpu.c
@@ -261,10 +261,33 @@ vg_ctrl_response_nodata(VuGpu *g,
     vg_ctrl_response(g, cmd, &resp, sizeof(resp));
 }
 
-void
-vg_get_display_info(VuGpu *vg, struct virtio_gpu_ctrl_command *cmd)
+
+static gboolean
+get_display_info_cb(gint fd, GIOCondition condition, gpointer user_data)
 {
     struct virtio_gpu_resp_display_info dpy_info = { {} };
+    VuGpu *vg = user_data;
+    struct virtio_gpu_ctrl_command *cmd = QTAILQ_LAST(&vg->fenceq);
+
+    g_debug("disp info cb");
+    assert(cmd->cmd_hdr.type == VIRTIO_GPU_CMD_GET_DISPLAY_INFO);
+    if (!vg_recv_msg(vg, VHOST_USER_GPU_GET_DISPLAY_INFO,
+                     sizeof(dpy_info), &dpy_info)) {
+        return G_SOURCE_CONTINUE;
+    }
+
+    QTAILQ_REMOVE(&vg->fenceq, cmd, next);
+    vg_ctrl_response(vg, cmd, &dpy_info.hdr, sizeof(dpy_info));
+
+    vg->wait_in = 0;
+    vg_handle_ctrl(&vg->dev.parent, 0);
+
+    return G_SOURCE_REMOVE;
+}
+
+void
+vg_get_display_info(VuGpu *vg, struct virtio_gpu_ctrl_command *cmd)
+{
     VhostUserGpuMsg msg = {
         .request = VHOST_USER_GPU_GET_DISPLAY_INFO,
         .size = 0,
@@ -273,11 +296,9 @@ vg_get_display_info(VuGpu *vg, struct virtio_gpu_ctrl_command *cmd)
     assert(vg->wait_in == 0);
 
     vg_send_msg(vg, &msg, -1);
-    if (!vg_recv_msg(vg, msg.request, sizeof(dpy_info), &dpy_info)) {
-        return;
-    }
-
-    vg_ctrl_response(vg, cmd, &dpy_info.hdr, sizeof(dpy_info));
+    vg->wait_in = g_unix_fd_add(vg->sock_fd, G_IO_IN | G_IO_HUP,
+                               get_display_info_cb, vg);
+    cmd->state = VG_CMD_STATE_PENDING;
 }
 
 static void
-- 
2.29.2

[PULL 09/24] ui: remove extra #ifdef CONFIG_OPENGL

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Since commit 5cb69566daa8081abb82a13403dcc0fffed02007 ("gtk: remove
CONFIG_GTK_GL"), some #ifdef are redundants.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-6-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 ui/gtk.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/ui/gtk.c b/ui/gtk.c
index 26665cd2e657..e1ee0840b377 100644
--- a/ui/gtk.c
+++ b/ui/gtk.c
@@ -625,8 +625,6 @@ static const DisplayChangeListenerOps dcl_ops = {
 
 /** DisplayState Callbacks (opengl version) **/
 
-#if defined(CONFIG_OPENGL)
-
 static const DisplayChangeListenerOps dcl_gl_area_ops = {
     .dpy_name             = "gtk-egl",
     .dpy_gfx_update       = gd_gl_area_update,
@@ -644,8 +642,6 @@ static const DisplayChangeListenerOps dcl_gl_area_ops = {
     .dpy_gl_update           = gd_gl_area_scanout_flush,
 };
 
-#endif /* CONFIG_OPENGL */
-
 static const DisplayChangeListenerOps dcl_egl_ops = {
     .dpy_name             = "gtk-egl",
     .dpy_gfx_update       = gd_egl_update,
@@ -1993,13 +1989,10 @@ static GSList *gd_vc_gfx_init(GtkDisplayState *s, VirtualConsole *vc,
 
 #if defined(CONFIG_OPENGL)
     if (display_opengl) {
-#if defined(CONFIG_OPENGL)
         if (gtk_use_gl_area) {
             vc->gfx.drawing_area = gtk_gl_area_new();
             vc->gfx.dcl.ops = &dcl_gl_area_ops;
-        } else
-#endif /* CONFIG_OPENGL */
-        {
+        } else {
             vc->gfx.drawing_area = gtk_drawing_area_new();
             /*
              * gtk_widget_set_double_buffered() was deprecated in 3.14.
-- 
2.29.2

[PULL 10/24] ui: remove gl_ctx_get_current

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

There are no users left.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-7-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/ui/console.h     | 2 --
 include/ui/egl-context.h | 1 -
 include/ui/sdl2.h        | 1 -
 ui/console.c             | 6 ------
 ui/egl-context.c         | 5 -----
 ui/egl-headless.c        | 1 -
 ui/gtk.c                 | 2 --
 ui/sdl2-gl.c             | 8 --------
 ui/sdl2.c                | 1 -
 ui/spice-display.c       | 1 -
 10 files changed, 28 deletions(-)

diff --git a/include/ui/console.h b/include/ui/console.h
index 7a3fc11abf72..ce6c72e37c6b 100644
--- a/include/ui/console.h
+++ b/include/ui/console.h
@@ -201,7 +201,6 @@ typedef struct DisplayChangeListenerOps {
                                QEMUGLContext ctx);
     int (*dpy_gl_ctx_make_current)(DisplayChangeListener *dcl,
                                    QEMUGLContext ctx);
-    QEMUGLContext (*dpy_gl_ctx_get_current)(DisplayChangeListener *dcl);
 
     void (*dpy_gl_scanout_disable)(DisplayChangeListener *dcl);
     void (*dpy_gl_scanout_texture)(DisplayChangeListener *dcl,
@@ -303,7 +302,6 @@ QEMUGLContext dpy_gl_ctx_create(QemuConsole *con,
                                 QEMUGLParams *params);
 void dpy_gl_ctx_destroy(QemuConsole *con, QEMUGLContext ctx);
 int dpy_gl_ctx_make_current(QemuConsole *con, QEMUGLContext ctx);
-QEMUGLContext dpy_gl_ctx_get_current(QemuConsole *con);
 
 bool console_has_gl(QemuConsole *con);
 bool console_has_gl_dmabuf(QemuConsole *con);
diff --git a/include/ui/egl-context.h b/include/ui/egl-context.h
index f004ce11a7bc..9374fe41e32b 100644
--- a/include/ui/egl-context.h
+++ b/include/ui/egl-context.h
@@ -9,6 +9,5 @@ QEMUGLContext qemu_egl_create_context(DisplayChangeListener *dcl,
 void qemu_egl_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx);
 int qemu_egl_make_context_current(DisplayChangeListener *dcl,
                                   QEMUGLContext ctx);
-QEMUGLContext qemu_egl_get_current_context(DisplayChangeListener *dcl);
 
 #endif /* EGL_CONTEXT_H */
diff --git a/include/ui/sdl2.h b/include/ui/sdl2.h
index 0875b8d56b7e..f85c117a78f2 100644
--- a/include/ui/sdl2.h
+++ b/include/ui/sdl2.h
@@ -70,7 +70,6 @@ QEMUGLContext sdl2_gl_create_context(DisplayChangeListener *dcl,
 void sdl2_gl_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx);
 int sdl2_gl_make_context_current(DisplayChangeListener *dcl,
                                  QEMUGLContext ctx);
-QEMUGLContext sdl2_gl_get_current_context(DisplayChangeListener *dcl);
 
 void sdl2_gl_scanout_disable(DisplayChangeListener *dcl);
 void sdl2_gl_scanout_texture(DisplayChangeListener *dcl,
diff --git a/ui/console.c b/ui/console.c
index d80ce7037c32..c0b1a3689c3d 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -1803,12 +1803,6 @@ int dpy_gl_ctx_make_current(QemuConsole *con, QEMUGLContext ctx)
     return con->gl->ops->dpy_gl_ctx_make_current(con->gl, ctx);
 }
 
-QEMUGLContext dpy_gl_ctx_get_current(QemuConsole *con)
-{
-    assert(con->gl);
-    return con->gl->ops->dpy_gl_ctx_get_current(con->gl);
-}
-
 void dpy_gl_scanout_disable(QemuConsole *con)
 {
     assert(con->gl);
diff --git a/ui/egl-context.c b/ui/egl-context.c
index 4aa1cbb50c25..368ffa49d82f 100644
--- a/ui/egl-context.c
+++ b/ui/egl-context.c
@@ -35,8 +35,3 @@ int qemu_egl_make_context_current(DisplayChangeListener *dcl,
    return eglMakeCurrent(qemu_egl_display,
                          EGL_NO_SURFACE, EGL_NO_SURFACE, ctx);
 }
-
-QEMUGLContext qemu_egl_get_current_context(DisplayChangeListener *dcl)
-{
-    return eglGetCurrentContext();
-}
diff --git a/ui/egl-headless.c b/ui/egl-headless.c
index fe2a0d1eab98..da377a74af69 100644
--- a/ui/egl-headless.c
+++ b/ui/egl-headless.c
@@ -160,7 +160,6 @@ static const DisplayChangeListenerOps egl_ops = {
     .dpy_gl_ctx_create       = egl_create_context,
     .dpy_gl_ctx_destroy      = qemu_egl_destroy_context,
     .dpy_gl_ctx_make_current = qemu_egl_make_context_current,
-    .dpy_gl_ctx_get_current  = qemu_egl_get_current_context,
 
     .dpy_gl_scanout_disable  = egl_scanout_disable,
     .dpy_gl_scanout_texture  = egl_scanout_texture,
diff --git a/ui/gtk.c b/ui/gtk.c
index e1ee0840b377..a0e6b60ac4f5 100644
--- a/ui/gtk.c
+++ b/ui/gtk.c
@@ -637,7 +637,6 @@ static const DisplayChangeListenerOps dcl_gl_area_ops = {
     .dpy_gl_ctx_create       = gd_gl_area_create_context,
     .dpy_gl_ctx_destroy      = gd_gl_area_destroy_context,
     .dpy_gl_ctx_make_current = gd_gl_area_make_current,
-    .dpy_gl_ctx_get_current  = gd_gl_area_get_current_context,
     .dpy_gl_scanout_texture  = gd_gl_area_scanout_texture,
     .dpy_gl_update           = gd_gl_area_scanout_flush,
 };
@@ -654,7 +653,6 @@ static const DisplayChangeListenerOps dcl_egl_ops = {
     .dpy_gl_ctx_create       = gd_egl_create_context,
     .dpy_gl_ctx_destroy      = qemu_egl_destroy_context,
     .dpy_gl_ctx_make_current = gd_egl_make_current,
-    .dpy_gl_ctx_get_current  = qemu_egl_get_current_context,
     .dpy_gl_scanout_disable  = gd_egl_scanout_disable,
     .dpy_gl_scanout_texture  = gd_egl_scanout_texture,
     .dpy_gl_scanout_dmabuf   = gd_egl_scanout_dmabuf,
diff --git a/ui/sdl2-gl.c b/ui/sdl2-gl.c
index c73d273bf804..82139ba49e8f 100644
--- a/ui/sdl2-gl.c
+++ b/ui/sdl2-gl.c
@@ -185,14 +185,6 @@ int sdl2_gl_make_context_current(DisplayChangeListener *dcl,
     return SDL_GL_MakeCurrent(scon->real_window, sdlctx);
 }
 
-QEMUGLContext sdl2_gl_get_current_context(DisplayChangeListener *dcl)
-{
-    SDL_GLContext sdlctx;
-
-    sdlctx = SDL_GL_GetCurrentContext();
-    return (QEMUGLContext)sdlctx;
-}
-
 void sdl2_gl_scanout_disable(DisplayChangeListener *dcl)
 {
     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
diff --git a/ui/sdl2.c b/ui/sdl2.c
index 5e49709283e5..a203cb0239e1 100644
--- a/ui/sdl2.c
+++ b/ui/sdl2.c
@@ -781,7 +781,6 @@ static const DisplayChangeListenerOps dcl_gl_ops = {
     .dpy_gl_ctx_create       = sdl2_gl_create_context,
     .dpy_gl_ctx_destroy      = sdl2_gl_destroy_context,
     .dpy_gl_ctx_make_current = sdl2_gl_make_context_current,
-    .dpy_gl_ctx_get_current  = sdl2_gl_get_current_context,
     .dpy_gl_scanout_disable  = sdl2_gl_scanout_disable,
     .dpy_gl_scanout_texture  = sdl2_gl_scanout_texture,
     .dpy_gl_update           = sdl2_gl_scanout_flush,
diff --git a/ui/spice-display.c b/ui/spice-display.c
index 3d3e3bcb2246..dccac4710a5e 100644
--- a/ui/spice-display.c
+++ b/ui/spice-display.c
@@ -1102,7 +1102,6 @@ static const DisplayChangeListenerOps display_listener_gl_ops = {
     .dpy_gl_ctx_create       = qemu_spice_gl_create_context,
     .dpy_gl_ctx_destroy      = qemu_egl_destroy_context,
     .dpy_gl_ctx_make_current = qemu_egl_make_context_current,
-    .dpy_gl_ctx_get_current  = qemu_egl_get_current_context,
 
     .dpy_gl_scanout_disable  = qemu_spice_gl_scanout_disable,
     .dpy_gl_scanout_texture  = qemu_spice_gl_scanout_texture,
-- 
2.29.2

[PULL 11/24] ui: add gd_gl_area_scanout_disable

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Require the callback, drop the fallback path.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-8-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/ui/gtk.h | 1 +
 ui/console.c     | 7 +------
 ui/gtk-gl-area.c | 7 +++++++
 ui/gtk.c         | 1 +
 4 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/include/ui/gtk.h b/include/ui/gtk.h
index 3f395d7f943b..7569d090fa95 100644
--- a/include/ui/gtk.h
+++ b/include/ui/gtk.h
@@ -140,6 +140,7 @@ void gd_gl_area_scanout_texture(DisplayChangeListener *dcl,
                                 uint32_t backing_height,
                                 uint32_t x, uint32_t y,
                                 uint32_t w, uint32_t h);
+void gd_gl_area_scanout_disable(DisplayChangeListener *dcl);
 void gd_gl_area_scanout_flush(DisplayChangeListener *dcl,
                               uint32_t x, uint32_t y, uint32_t w, uint32_t h);
 void gtk_gl_area_init(void);
diff --git a/ui/console.c b/ui/console.c
index c0b1a3689c3d..ab9224429e29 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -1806,12 +1806,7 @@ int dpy_gl_ctx_make_current(QemuConsole *con, QEMUGLContext ctx)
 void dpy_gl_scanout_disable(QemuConsole *con)
 {
     assert(con->gl);
-    if (con->gl->ops->dpy_gl_scanout_disable) {
-        con->gl->ops->dpy_gl_scanout_disable(con->gl);
-    } else {
-        con->gl->ops->dpy_gl_scanout_texture(con->gl, 0, false, 0, 0,
-                                             0, 0, 0, 0);
-    }
+    con->gl->ops->dpy_gl_scanout_disable(con->gl);
 }
 
 void dpy_gl_scanout_texture(QemuConsole *con,
diff --git a/ui/gtk-gl-area.c b/ui/gtk-gl-area.c
index 98c22d23f501..96fbe75387ce 100644
--- a/ui/gtk-gl-area.c
+++ b/ui/gtk-gl-area.c
@@ -198,6 +198,13 @@ void gd_gl_area_scanout_texture(DisplayChangeListener *dcl,
                          backing_id, false);
 }
 
+void gd_gl_area_scanout_disable(DisplayChangeListener *dcl)
+{
+    VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
+
+    gtk_gl_area_set_scanout_mode(vc, false);
+}
+
 void gd_gl_area_scanout_flush(DisplayChangeListener *dcl,
                           uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 {
diff --git a/ui/gtk.c b/ui/gtk.c
index a0e6b60ac4f5..00045881b121 100644
--- a/ui/gtk.c
+++ b/ui/gtk.c
@@ -638,6 +638,7 @@ static const DisplayChangeListenerOps dcl_gl_area_ops = {
     .dpy_gl_ctx_destroy      = gd_gl_area_destroy_context,
     .dpy_gl_ctx_make_current = gd_gl_area_make_current,
     .dpy_gl_scanout_texture  = gd_gl_area_scanout_texture,
+    .dpy_gl_scanout_disable  = gd_gl_area_scanout_disable,
     .dpy_gl_update           = gd_gl_area_scanout_flush,
 };
 
-- 
2.29.2

[PULL 12/24] ui: annotate DCLOps callback requirements

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-9-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/ui/console.h | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/include/ui/console.h b/include/ui/console.h
index ce6c72e37c6b..bea2b6329a92 100644
--- a/include/ui/console.h
+++ b/include/ui/console.h
@@ -174,35 +174,49 @@ typedef struct DisplayState DisplayState;
 typedef struct DisplayChangeListenerOps {
     const char *dpy_name;
 
+    /* optional */
     void (*dpy_refresh)(DisplayChangeListener *dcl);
 
+    /* optional */
     void (*dpy_gfx_update)(DisplayChangeListener *dcl,
                            int x, int y, int w, int h);
+    /* optional */
     void (*dpy_gfx_switch)(DisplayChangeListener *dcl,
                            struct DisplaySurface *new_surface);
+    /* optional */
     bool (*dpy_gfx_check_format)(DisplayChangeListener *dcl,
                                  pixman_format_code_t format);
 
+    /* optional */
     void (*dpy_text_cursor)(DisplayChangeListener *dcl,
                             int x, int y);
+    /* optional */
     void (*dpy_text_resize)(DisplayChangeListener *dcl,
                             int w, int h);
+    /* optional */
     void (*dpy_text_update)(DisplayChangeListener *dcl,
                             int x, int y, int w, int h);
 
+    /* optional */
     void (*dpy_mouse_set)(DisplayChangeListener *dcl,
                           int x, int y, int on);
+    /* optional */
     void (*dpy_cursor_define)(DisplayChangeListener *dcl,
                               QEMUCursor *cursor);
 
+    /* required if GL */
     QEMUGLContext (*dpy_gl_ctx_create)(DisplayChangeListener *dcl,
                                        QEMUGLParams *params);
+    /* required if GL */
     void (*dpy_gl_ctx_destroy)(DisplayChangeListener *dcl,
                                QEMUGLContext ctx);
+    /* required if GL */
     int (*dpy_gl_ctx_make_current)(DisplayChangeListener *dcl,
                                    QEMUGLContext ctx);
 
+    /* required if GL */
     void (*dpy_gl_scanout_disable)(DisplayChangeListener *dcl);
+    /* required if GL */
     void (*dpy_gl_scanout_texture)(DisplayChangeListener *dcl,
                                    uint32_t backing_id,
                                    bool backing_y_0_top,
@@ -210,15 +224,20 @@ typedef struct DisplayChangeListenerOps {
                                    uint32_t backing_height,
                                    uint32_t x, uint32_t y,
                                    uint32_t w, uint32_t h);
+    /* optional */
     void (*dpy_gl_scanout_dmabuf)(DisplayChangeListener *dcl,
                                   QemuDmaBuf *dmabuf);
+    /* optional */
     void (*dpy_gl_cursor_dmabuf)(DisplayChangeListener *dcl,
                                  QemuDmaBuf *dmabuf, bool have_hot,
                                  uint32_t hot_x, uint32_t hot_y);
+    /* optional */
     void (*dpy_gl_cursor_position)(DisplayChangeListener *dcl,
                                    uint32_t pos_x, uint32_t pos_y);
+    /* optional */
     void (*dpy_gl_release_dmabuf)(DisplayChangeListener *dcl,
                                   QemuDmaBuf *dmabuf);
+    /* required if GL */
     void (*dpy_gl_update)(DisplayChangeListener *dcl,
                           uint32_t x, uint32_t y, uint32_t w, uint32_t h);
 
-- 
2.29.2

[PULL 13/24] ui: remove console_has_gl_dmabuf()

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

This check is currently limited. It only is used by vhost-user-gpu (not
by vfio-display), and will print an error repeatedly during run-time.

We are going to dissociate the GL context from the
DisplayChangeListener, and listeners may come and go. The following
patches will address this differently.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-10-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/ui/console.h        | 1 -
 hw/display/vhost-user-gpu.c | 5 -----
 ui/console.c                | 5 -----
 3 files changed, 11 deletions(-)

diff --git a/include/ui/console.h b/include/ui/console.h
index bea2b6329a92..ac989fdf7016 100644
--- a/include/ui/console.h
+++ b/include/ui/console.h
@@ -323,7 +323,6 @@ void dpy_gl_ctx_destroy(QemuConsole *con, QEMUGLContext ctx);
 int dpy_gl_ctx_make_current(QemuConsole *con, QEMUGLContext ctx);
 
 bool console_has_gl(QemuConsole *con);
-bool console_has_gl_dmabuf(QemuConsole *con);
 
 static inline int surface_stride(DisplaySurface *s)
 {
diff --git a/hw/display/vhost-user-gpu.c b/hw/display/vhost-user-gpu.c
index 55b0ed15f250..dd587436ff34 100644
--- a/hw/display/vhost-user-gpu.c
+++ b/hw/display/vhost-user-gpu.c
@@ -224,11 +224,6 @@ vhost_user_gpu_handle_display(VhostUserGPU *g, VhostUserGpuMsg *msg)
             close(dmabuf->fd);
             dmabuf->fd = -1;
         }
-        if (!console_has_gl_dmabuf(con)) {
-            /* it would be nice to report that error earlier */
-            error_report("console doesn't support dmabuf!");
-            break;
-        }
         dpy_gl_release_dmabuf(con, dmabuf);
         if (fd == -1) {
             dpy_gl_scanout_disable(con);
diff --git a/ui/console.c b/ui/console.c
index ab9224429e29..b5bc3f7699a1 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -1463,11 +1463,6 @@ bool console_has_gl(QemuConsole *con)
     return con->gl != NULL;
 }
 
-bool console_has_gl_dmabuf(QemuConsole *con)
-{
-    return con->gl != NULL && con->gl->ops->dpy_gl_scanout_dmabuf != NULL;
-}
-
 void register_displaychangelistener(DisplayChangeListener *dcl)
 {
     static const char nodev[] =
-- 
2.29.2

[PULL 14/24] vhost-user-gpu: add a configuration flag for dmabuf usage

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Let's inform VirtioGPUBase that vhost-user-gpu require DMABUF messages.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-11-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/hw/virtio/virtio-gpu.h | 3 +++
 hw/display/vhost-user-gpu.c    | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h
index 1aed7275c824..4f3dbf79f9bc 100644
--- a/include/hw/virtio/virtio-gpu.h
+++ b/include/hw/virtio/virtio-gpu.h
@@ -71,6 +71,7 @@ enum virtio_gpu_base_conf_flags {
     VIRTIO_GPU_FLAG_VIRGL_ENABLED = 1,
     VIRTIO_GPU_FLAG_STATS_ENABLED,
     VIRTIO_GPU_FLAG_EDID_ENABLED,
+    VIRTIO_GPU_FLAG_DMABUF_ENABLED,
 };
 
 #define virtio_gpu_virgl_enabled(_cfg) \
@@ -79,6 +80,8 @@ enum virtio_gpu_base_conf_flags {
     (_cfg.flags & (1 << VIRTIO_GPU_FLAG_STATS_ENABLED))
 #define virtio_gpu_edid_enabled(_cfg) \
     (_cfg.flags & (1 << VIRTIO_GPU_FLAG_EDID_ENABLED))
+#define virtio_gpu_dmabuf_enabled(_cfg) \
+    (_cfg.flags & (1 << VIRTIO_GPU_FLAG_DMABUF_ENABLED))
 
 struct virtio_gpu_base_conf {
     uint32_t max_outputs;
diff --git a/hw/display/vhost-user-gpu.c b/hw/display/vhost-user-gpu.c
index dd587436ff34..b7bde9feb614 100644
--- a/hw/display/vhost-user-gpu.c
+++ b/hw/display/vhost-user-gpu.c
@@ -547,6 +547,8 @@ vhost_user_gpu_device_realize(DeviceState *qdev, Error **errp)
         return;
     }
 
+    /* existing backend may send DMABUF, so let's add that requirement */
+    g->parent_obj.conf.flags |= 1 << VIRTIO_GPU_FLAG_DMABUF_ENABLED;
     if (virtio_has_feature(g->vhost->dev.features, VIRTIO_GPU_F_VIRGL)) {
         g->parent_obj.conf.flags |= 1 << VIRTIO_GPU_FLAG_VIRGL_ENABLED;
     }
-- 
2.29.2

[PULL 15/24] ui: add an optional get_flags callback to GraphicHwOps

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Those flags can be used to express different requirements for the
display or other needs.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-12-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/ui/console.h         |  9 +++++++++
 hw/display/virtio-gpu-base.c | 18 ++++++++++++++++++
 hw/display/virtio-vga.c      |  9 +++++++++
 hw/vfio/display.c            |  6 ++++++
 4 files changed, 42 insertions(+)

diff --git a/include/ui/console.h b/include/ui/console.h
index ac989fdf7016..0595aa9953cf 100644
--- a/include/ui/console.h
+++ b/include/ui/console.h
@@ -368,7 +368,16 @@ static inline void console_write_ch(console_ch_t *dest, uint32_t ch)
     *dest = ch;
 }
 
+enum {
+    GRAPHIC_FLAGS_NONE     = 0,
+    /* require a console/display with GL callbacks */
+    GRAPHIC_FLAGS_GL       = 1 << 0,
+    /* require a console/display with DMABUF import */
+    GRAPHIC_FLAGS_DMABUF   = 1 << 1,
+};
+
 typedef struct GraphicHwOps {
+    int (*get_flags)(void *opaque); /* optional, default 0 */
     void (*invalidate)(void *opaque);
     void (*gfx_update)(void *opaque);
     bool gfx_update_async; /* if true, calls graphic_hw_update_done() */
diff --git a/hw/display/virtio-gpu-base.c b/hw/display/virtio-gpu-base.c
index 40ccd00f9421..f27a6fbe75d1 100644
--- a/hw/display/virtio-gpu-base.c
+++ b/hw/display/virtio-gpu-base.c
@@ -114,7 +114,25 @@ virtio_gpu_gl_block(void *opaque, bool block)
     }
 }
 
+static int
+virtio_gpu_get_flags(void *opaque)
+{
+    VirtIOGPUBase *g = opaque;
+    int flags = GRAPHIC_FLAGS_NONE;
+
+    if (virtio_gpu_virgl_enabled(g->conf)) {
+        flags |= GRAPHIC_FLAGS_GL;
+    }
+
+    if (virtio_gpu_dmabuf_enabled(g->conf)) {
+        flags |= GRAPHIC_FLAGS_DMABUF;
+    }
+
+    return flags;
+}
+
 static const GraphicHwOps virtio_gpu_ops = {
+    .get_flags = virtio_gpu_get_flags,
     .invalidate = virtio_gpu_invalidate_display,
     .gfx_update = virtio_gpu_update_display,
     .text_update = virtio_gpu_text_update,
diff --git a/hw/display/virtio-vga.c b/hw/display/virtio-vga.c
index 81f776ee36e7..b071909b6893 100644
--- a/hw/display/virtio-vga.c
+++ b/hw/display/virtio-vga.c
@@ -68,7 +68,16 @@ static void virtio_vga_base_gl_block(void *opaque, bool block)
     }
 }
 
+static int virtio_vga_base_get_flags(void *opaque)
+{
+    VirtIOVGABase *vvga = opaque;
+    VirtIOGPUBase *g = vvga->vgpu;
+
+    return g->hw_ops->get_flags(g);
+}
+
 static const GraphicHwOps virtio_vga_base_ops = {
+    .get_flags = virtio_vga_base_get_flags,
     .invalidate = virtio_vga_base_invalidate_display,
     .gfx_update = virtio_vga_base_update_display,
     .text_update = virtio_vga_base_text_update,
diff --git a/hw/vfio/display.c b/hw/vfio/display.c
index 42d67e870b71..f04473e3cece 100644
--- a/hw/vfio/display.c
+++ b/hw/vfio/display.c
@@ -335,7 +335,13 @@ static void vfio_display_dmabuf_update(void *opaque)
     }
 }
 
+static int vfio_display_get_flags(void *opaque)
+{
+    return GRAPHIC_FLAGS_GL | GRAPHIC_FLAGS_DMABUF;
+}
+
 static const GraphicHwOps vfio_display_dmabuf_ops = {
+    .get_flags  = vfio_display_get_flags,
     .gfx_update = vfio_display_dmabuf_update,
     .ui_info    = vfio_display_edid_ui_info,
 };
-- 
2.29.2

[PULL 16/24] ui: add a DCLOps callback to check dmabuf support

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-13-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/ui/console.h |  2 ++
 ui/console.c         | 13 +++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/include/ui/console.h b/include/ui/console.h
index 0595aa9953cf..875885d9c7ce 100644
--- a/include/ui/console.h
+++ b/include/ui/console.h
@@ -224,6 +224,8 @@ typedef struct DisplayChangeListenerOps {
                                    uint32_t backing_height,
                                    uint32_t x, uint32_t y,
                                    uint32_t w, uint32_t h);
+    /* optional (default to true if has dpy_gl_scanout_dmabuf) */
+    bool (*dpy_has_dmabuf)(DisplayChangeListener *dcl);
     /* optional */
     void (*dpy_gl_scanout_dmabuf)(DisplayChangeListener *dcl,
                                   QemuDmaBuf *dmabuf);
diff --git a/ui/console.c b/ui/console.c
index b5bc3f7699a1..a645418adad5 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -1463,6 +1463,19 @@ bool console_has_gl(QemuConsole *con)
     return con->gl != NULL;
 }
 
+static bool displaychangelistener_has_dmabuf(DisplayChangeListener *dcl)
+{
+    if (dcl->ops->dpy_has_dmabuf) {
+        return dcl->ops->dpy_has_dmabuf(dcl);
+    }
+
+    if (dcl->ops->dpy_gl_scanout_dmabuf) {
+        return true;
+    }
+
+    return false;
+}
+
 void register_displaychangelistener(DisplayChangeListener *dcl)
 {
     static const char nodev[] =
-- 
2.29.2

[PULL 17/24] ui: check hw requirements during DCL registration

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-14-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 ui/console.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/ui/console.c b/ui/console.c
index a645418adad5..d8cc640c28db 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -1476,12 +1476,37 @@ static bool displaychangelistener_has_dmabuf(DisplayChangeListener *dcl)
     return false;
 }
 
+static bool dpy_compatible_with(QemuConsole *con,
+                                DisplayChangeListener *dcl, Error **errp)
+{
+    ERRP_GUARD();
+    int flags;
+
+    flags = con->hw_ops->get_flags ? con->hw_ops->get_flags(con->hw) : 0;
+
+    if (flags & GRAPHIC_FLAGS_GL &&
+        !console_has_gl(con)) {
+        error_setg(errp, "The console requires a GL context.");
+        return false;
+
+    }
+
+    if (flags & GRAPHIC_FLAGS_DMABUF &&
+        !displaychangelistener_has_dmabuf(dcl)) {
+        error_setg(errp, "The console requires display DMABUF support.");
+        return false;
+    }
+
+    return true;
+}
+
 void register_displaychangelistener(DisplayChangeListener *dcl)
 {
     static const char nodev[] =
         "This VM has no graphic display device.";
     static DisplaySurface *dummy;
     QemuConsole *con;
+    Error *err = NULL;
 
     assert(!dcl->ds);
 
@@ -1496,6 +1521,11 @@ void register_displaychangelistener(DisplayChangeListener *dcl)
         dcl->con->gl = dcl;
     }
 
+    if (dcl->con && !dpy_compatible_with(dcl->con, dcl, &err)) {
+        error_report_err(err);
+        exit(1);
+    }
+
     trace_displaychangelistener_register(dcl, dcl->ops->dpy_name);
     dcl->ds = get_alloc_displaystate();
     QLIST_INSERT_HEAD(&dcl->ds->listeners, dcl, next);
-- 
2.29.2

[PULL 18/24] ui: add qemu_egl_has_dmabuf helper

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-15-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/ui/egl-helpers.h |  1 +
 ui/egl-helpers.c         | 10 ++++++++++
 2 files changed, 11 insertions(+)

diff --git a/include/ui/egl-helpers.h b/include/ui/egl-helpers.h
index 94a4b3e6f3bd..5b1f7fafe0bc 100644
--- a/include/ui/egl-helpers.h
+++ b/include/ui/egl-helpers.h
@@ -51,5 +51,6 @@ EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, EGLNativeWindowType win);
 int qemu_egl_init_dpy_x11(EGLNativeDisplayType dpy, DisplayGLMode mode);
 int qemu_egl_init_dpy_mesa(EGLNativeDisplayType dpy, DisplayGLMode mode);
 EGLContext qemu_egl_init_ctx(void);
+bool qemu_egl_has_dmabuf(void);
 
 #endif /* EGL_HELPERS_H */
diff --git a/ui/egl-helpers.c b/ui/egl-helpers.c
index 7c530c2825be..73fe61f87819 100644
--- a/ui/egl-helpers.c
+++ b/ui/egl-helpers.c
@@ -441,6 +441,16 @@ int qemu_egl_init_dpy_mesa(EGLNativeDisplayType dpy, DisplayGLMode mode)
 #endif
 }
 
+bool qemu_egl_has_dmabuf(void)
+{
+    if (qemu_egl_display == EGL_NO_DISPLAY) {
+        return false;
+    }
+
+    return epoxy_has_egl_extension(qemu_egl_display,
+                                   "EGL_EXT_image_dma_buf_import");
+}
+
 EGLContext qemu_egl_init_ctx(void)
 {
     static const EGLint ctx_att_core[] = {
-- 
2.29.2

[PULL 19/24] ui: check gtk-egl dmabuf support

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-16-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/ui/gtk.h | 1 +
 ui/gtk.c         | 9 +++++++++
 2 files changed, 10 insertions(+)

diff --git a/include/ui/gtk.h b/include/ui/gtk.h
index 7569d090fa95..aaef884b95b4 100644
--- a/include/ui/gtk.h
+++ b/include/ui/gtk.h
@@ -48,6 +48,7 @@ typedef struct VirtualGfxConsole {
     int cursor_y;
     bool y0_top;
     bool scanout_mode;
+    bool has_dmabuf;
 #endif
 } VirtualGfxConsole;
 
diff --git a/ui/gtk.c b/ui/gtk.c
index 00045881b121..f41c396cb98a 100644
--- a/ui/gtk.c
+++ b/ui/gtk.c
@@ -623,6 +623,13 @@ static const DisplayChangeListenerOps dcl_ops = {
 
 #if defined(CONFIG_OPENGL)
 
+static bool gd_has_dmabuf(DisplayChangeListener *dcl)
+{
+    VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
+
+    return vc->gfx.has_dmabuf;
+}
+
 /** DisplayState Callbacks (opengl version) **/
 
 static const DisplayChangeListenerOps dcl_gl_area_ops = {
@@ -661,6 +668,7 @@ static const DisplayChangeListenerOps dcl_egl_ops = {
     .dpy_gl_cursor_position  = gd_egl_cursor_position,
     .dpy_gl_release_dmabuf   = gd_egl_release_dmabuf,
     .dpy_gl_update           = gd_egl_scanout_flush,
+    .dpy_has_dmabuf          = gd_has_dmabuf,
 };
 
 #endif /* CONFIG_OPENGL */
@@ -2004,6 +2012,7 @@ static GSList *gd_vc_gfx_init(GtkDisplayState *s, VirtualConsole *vc,
             gtk_widget_set_double_buffered(vc->gfx.drawing_area, FALSE);
 #pragma GCC diagnostic pop
             vc->gfx.dcl.ops = &dcl_egl_ops;
+            vc->gfx.has_dmabuf = qemu_egl_has_dmabuf();
         }
     } else
 #endif
-- 
2.29.2

[PULL 20/24] ui: add egl dmabuf import to gtkglarea

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

GtkGLArea is used on wayland, where EGL is usually available.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-17-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/ui/gtk.h |  2 ++
 ui/gtk-gl-area.c | 18 ++++++++++++++++++
 ui/gtk.c         | 22 ++++++++++++++++++++++
 3 files changed, 42 insertions(+)

diff --git a/include/ui/gtk.h b/include/ui/gtk.h
index aaef884b95b4..3c1cd98db8b1 100644
--- a/include/ui/gtk.h
+++ b/include/ui/gtk.h
@@ -134,6 +134,8 @@ QEMUGLContext gd_gl_area_create_context(DisplayChangeListener *dcl,
                                         QEMUGLParams *params);
 void gd_gl_area_destroy_context(DisplayChangeListener *dcl,
                                 QEMUGLContext ctx);
+void gd_gl_area_scanout_dmabuf(DisplayChangeListener *dcl,
+                               QemuDmaBuf *dmabuf);
 void gd_gl_area_scanout_texture(DisplayChangeListener *dcl,
                                 uint32_t backing_id,
                                 bool backing_y_0_top,
diff --git a/ui/gtk-gl-area.c b/ui/gtk-gl-area.c
index 96fbe75387ce..72bcd949180f 100644
--- a/ui/gtk-gl-area.c
+++ b/ui/gtk-gl-area.c
@@ -213,6 +213,24 @@ void gd_gl_area_scanout_flush(DisplayChangeListener *dcl,
     gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
 }
 
+void gd_gl_area_scanout_dmabuf(DisplayChangeListener *dcl,
+                               QemuDmaBuf *dmabuf)
+{
+#ifdef CONFIG_OPENGL_DMABUF
+    VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
+
+    gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
+    egl_dmabuf_import_texture(dmabuf);
+    if (!dmabuf->texture) {
+        return;
+    }
+
+    gd_gl_area_scanout_texture(dcl, dmabuf->texture,
+                               false, dmabuf->width, dmabuf->height,
+                               0, 0, dmabuf->width, dmabuf->height);
+#endif
+}
+
 void gtk_gl_area_init(void)
 {
     display_opengl = 1;
diff --git a/ui/gtk.c b/ui/gtk.c
index f41c396cb98a..79dc2401203a 100644
--- a/ui/gtk.c
+++ b/ui/gtk.c
@@ -627,6 +627,12 @@ static bool gd_has_dmabuf(DisplayChangeListener *dcl)
 {
     VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
 
+    if (gtk_use_gl_area && !gtk_widget_get_realized(vc->gfx.drawing_area)) {
+        /* FIXME: Assume it will work, actual check done after realize */
+        /* fixing this would require delaying listener registration */
+        return true;
+    }
+
     return vc->gfx.has_dmabuf;
 }
 
@@ -647,6 +653,8 @@ static const DisplayChangeListenerOps dcl_gl_area_ops = {
     .dpy_gl_scanout_texture  = gd_gl_area_scanout_texture,
     .dpy_gl_scanout_disable  = gd_gl_area_scanout_disable,
     .dpy_gl_update           = gd_gl_area_scanout_flush,
+    .dpy_gl_scanout_dmabuf   = gd_gl_area_scanout_dmabuf,
+    .dpy_has_dmabuf          = gd_has_dmabuf,
 };
 
 static const DisplayChangeListenerOps dcl_egl_ops = {
@@ -1983,6 +1991,18 @@ static GtkWidget *gd_create_menu_machine(GtkDisplayState *s)
     return machine_menu;
 }
 
+#if defined(CONFIG_OPENGL)
+static void gl_area_realize(GtkGLArea *area, VirtualConsole *vc)
+{
+    gtk_gl_area_make_current(area);
+    qemu_egl_display = eglGetCurrentDisplay();
+    vc->gfx.has_dmabuf = qemu_egl_has_dmabuf();
+    if (!vc->gfx.has_dmabuf) {
+        error_report("GtkGLArea console lacks DMABUF support.");
+    }
+}
+#endif
+
 static GSList *gd_vc_gfx_init(GtkDisplayState *s, VirtualConsole *vc,
                               QemuConsole *con, int idx,
                               GSList *group, GtkWidget *view_menu)
@@ -1998,6 +2018,8 @@ static GSList *gd_vc_gfx_init(GtkDisplayState *s, VirtualConsole *vc,
     if (display_opengl) {
         if (gtk_use_gl_area) {
             vc->gfx.drawing_area = gtk_gl_area_new();
+            g_signal_connect(vc->gfx.drawing_area, "realize",
+                             G_CALLBACK(gl_area_realize), vc);
             vc->gfx.dcl.ops = &dcl_gl_area_ops;
         } else {
             vc->gfx.drawing_area = gtk_drawing_area_new();
-- 
2.29.2

[PULL 21/24] virtio-gpu: avoid re-entering cmdq processing

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

The next patch will notify the GL context got flush, which will resume
the queue processing. However, if this happens within the caller
context, it will end up with a stack overflow flush/update loop.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-18-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/hw/virtio/virtio-gpu.h | 1 +
 hw/display/virtio-gpu.c        | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h
index 4f3dbf79f9bc..0043268e9021 100644
--- a/include/hw/virtio/virtio-gpu.h
+++ b/include/hw/virtio/virtio-gpu.h
@@ -148,6 +148,7 @@ struct VirtIOGPU {
 
     uint64_t hostmem;
 
+    bool processing_cmdq;
     bool renderer_inited;
     bool renderer_reset;
     QEMUTimer *fence_poll;
diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index 0e833a462bae..7eb4265a6da7 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -814,6 +814,10 @@ void virtio_gpu_process_cmdq(VirtIOGPU *g)
 {
     struct virtio_gpu_ctrl_command *cmd;
 
+    if (g->processing_cmdq) {
+        return;
+    }
+    g->processing_cmdq = true;
     while (!QTAILQ_EMPTY(&g->cmdq)) {
         cmd = QTAILQ_FIRST(&g->cmdq);
 
@@ -843,6 +847,7 @@ void virtio_gpu_process_cmdq(VirtIOGPU *g)
             g_free(cmd);
         }
     }
+    g->processing_cmdq = false;
 }
 
 static void virtio_gpu_gl_unblock(VirtIOGPUBase *b)
-- 
2.29.2

[PULL 22/24] display/ui: add a callback to indicate GL state is flushed

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Displaying rendered resources requires blocking qemu GPU to avoid extra
framebuffer copies. For an external display, via Spice currently, there
is a callback to block/unblock the rendering in the same thread.

But with the vhost-user-gpu backend, the qemu process doesn't handle
the rendering itself, and the blocking callback isn't effective.
Instead, the backend must be notified when the display code is done.

Fix this by adding a new GraphicHwOps callback to indicate the GL state
is flushed, and we are done manipulating the shared GL resources. Call
it from gtk and spice display.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-19-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/hw/virtio/virtio-gpu.h |  2 +-
 include/ui/console.h           |  2 ++
 hw/display/vhost-user-gpu.c    |  4 ++--
 hw/display/virtio-gpu-base.c   | 17 ++++++++++++-----
 hw/display/virtio-gpu.c        |  4 ++--
 hw/display/virtio-vga.c        | 11 +++++++++++
 ui/console.c                   |  9 +++++++++
 ui/gtk-egl.c                   |  3 +++
 ui/gtk-gl-area.c               |  3 +++
 ui/sdl2-gl.c                   |  2 ++
 ui/spice-display.c             |  1 +
 11 files changed, 48 insertions(+), 10 deletions(-)

diff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h
index 0043268e9021..fae149235c58 100644
--- a/include/hw/virtio/virtio-gpu.h
+++ b/include/hw/virtio/virtio-gpu.h
@@ -121,7 +121,7 @@ struct VirtIOGPUBase {
 struct VirtIOGPUBaseClass {
     VirtioDeviceClass parent;
 
-    void (*gl_unblock)(VirtIOGPUBase *g);
+    void (*gl_flushed)(VirtIOGPUBase *g);
 };
 
 #define VIRTIO_GPU_BASE_PROPERTIES(_state, _conf)                       \
diff --git a/include/ui/console.h b/include/ui/console.h
index 875885d9c7ce..d30e972d0b57 100644
--- a/include/ui/console.h
+++ b/include/ui/console.h
@@ -387,6 +387,7 @@ typedef struct GraphicHwOps {
     void (*update_interval)(void *opaque, uint64_t interval);
     int (*ui_info)(void *opaque, uint32_t head, QemuUIInfo *info);
     void (*gl_block)(void *opaque, bool block);
+    void (*gl_flushed)(void *opaque);
 } GraphicHwOps;
 
 QemuConsole *graphic_console_init(DeviceState *dev, uint32_t head,
@@ -402,6 +403,7 @@ void graphic_hw_update_done(QemuConsole *con);
 void graphic_hw_invalidate(QemuConsole *con);
 void graphic_hw_text_update(QemuConsole *con, console_ch_t *chardata);
 void graphic_hw_gl_block(QemuConsole *con, bool block);
+void graphic_hw_gl_flushed(QemuConsole *con);
 
 void qemu_console_early_init(void);
 
diff --git a/hw/display/vhost-user-gpu.c b/hw/display/vhost-user-gpu.c
index b7bde9feb614..4d8cb3525bfc 100644
--- a/hw/display/vhost-user-gpu.c
+++ b/hw/display/vhost-user-gpu.c
@@ -360,7 +360,7 @@ vhost_user_gpu_update_blocked(VhostUserGPU *g, bool blocked)
 }
 
 static void
-vhost_user_gpu_gl_unblock(VirtIOGPUBase *b)
+vhost_user_gpu_gl_flushed(VirtIOGPUBase *b)
 {
     VhostUserGPU *g = VHOST_USER_GPU(b);
 
@@ -578,7 +578,7 @@ vhost_user_gpu_class_init(ObjectClass *klass, void *data)
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
     VirtIOGPUBaseClass *vgc = VIRTIO_GPU_BASE_CLASS(klass);
 
-    vgc->gl_unblock = vhost_user_gpu_gl_unblock;
+    vgc->gl_flushed = vhost_user_gpu_gl_flushed;
 
     vdc->realize = vhost_user_gpu_device_realize;
     vdc->reset = vhost_user_gpu_reset;
diff --git a/hw/display/virtio-gpu-base.c b/hw/display/virtio-gpu-base.c
index f27a6fbe75d1..4a57350917cd 100644
--- a/hw/display/virtio-gpu-base.c
+++ b/hw/display/virtio-gpu-base.c
@@ -97,21 +97,27 @@ static int virtio_gpu_ui_info(void *opaque, uint32_t idx, QemuUIInfo *info)
 }
 
 static void
-virtio_gpu_gl_block(void *opaque, bool block)
+virtio_gpu_gl_flushed(void *opaque)
 {
     VirtIOGPUBase *g = opaque;
     VirtIOGPUBaseClass *vgc = VIRTIO_GPU_BASE_GET_CLASS(g);
 
+    if (vgc->gl_flushed) {
+        vgc->gl_flushed(g);
+    }
+}
+
+static void
+virtio_gpu_gl_block(void *opaque, bool block)
+{
+    VirtIOGPUBase *g = opaque;
+
     if (block) {
         g->renderer_blocked++;
     } else {
         g->renderer_blocked--;
     }
     assert(g->renderer_blocked >= 0);
-
-    if (g->renderer_blocked == 0) {
-        vgc->gl_unblock(g);
-    }
 }
 
 static int
@@ -138,6 +144,7 @@ static const GraphicHwOps virtio_gpu_ops = {
     .text_update = virtio_gpu_text_update,
     .ui_info = virtio_gpu_ui_info,
     .gl_block = virtio_gpu_gl_block,
+    .gl_flushed = virtio_gpu_gl_flushed,
 };
 
 bool
diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index 7eb4265a6da7..2e4a9822b6a4 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -850,7 +850,7 @@ void virtio_gpu_process_cmdq(VirtIOGPU *g)
     g->processing_cmdq = false;
 }
 
-static void virtio_gpu_gl_unblock(VirtIOGPUBase *b)
+static void virtio_gpu_gl_flushed(VirtIOGPUBase *b)
 {
     VirtIOGPU *g = VIRTIO_GPU(b);
 
@@ -1257,7 +1257,7 @@ static void virtio_gpu_class_init(ObjectClass *klass, void *data)
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
     VirtIOGPUBaseClass *vgc = VIRTIO_GPU_BASE_CLASS(klass);
 
-    vgc->gl_unblock = virtio_gpu_gl_unblock;
+    vgc->gl_flushed = virtio_gpu_gl_flushed;
     vdc->realize = virtio_gpu_device_realize;
     vdc->reset = virtio_gpu_reset;
     vdc->get_config = virtio_gpu_get_config;
diff --git a/hw/display/virtio-vga.c b/hw/display/virtio-vga.c
index b071909b6893..d3c640406152 100644
--- a/hw/display/virtio-vga.c
+++ b/hw/display/virtio-vga.c
@@ -68,6 +68,16 @@ static void virtio_vga_base_gl_block(void *opaque, bool block)
     }
 }
 
+static void virtio_vga_base_gl_flushed(void *opaque)
+{
+    VirtIOVGABase *vvga = opaque;
+    VirtIOGPUBase *g = vvga->vgpu;
+
+    if (g->hw_ops->gl_flushed) {
+        g->hw_ops->gl_flushed(g);
+    }
+}
+
 static int virtio_vga_base_get_flags(void *opaque)
 {
     VirtIOVGABase *vvga = opaque;
@@ -83,6 +93,7 @@ static const GraphicHwOps virtio_vga_base_ops = {
     .text_update = virtio_vga_base_text_update,
     .ui_info = virtio_vga_base_ui_info,
     .gl_block = virtio_vga_base_gl_block,
+    .gl_flushed = virtio_vga_base_gl_flushed,
 };
 
 static const VMStateDescription vmstate_virtio_vga_base = {
diff --git a/ui/console.c b/ui/console.c
index d8cc640c28db..c5d11bc7017f 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -294,6 +294,15 @@ void graphic_hw_gl_block(QemuConsole *con, bool block)
     }
 }
 
+void graphic_hw_gl_flushed(QemuConsole *con)
+{
+    assert(con != NULL);
+
+    if (con->hw_ops->gl_flushed) {
+        con->hw_ops->gl_flushed(con->hw);
+    }
+}
+
 int qemu_console_get_window_id(QemuConsole *con)
 {
     return con->window_id;
diff --git a/ui/gtk-egl.c b/ui/gtk-egl.c
index 71c3d698b400..588e7b1bb199 100644
--- a/ui/gtk-egl.c
+++ b/ui/gtk-egl.c
@@ -92,6 +92,9 @@ void gd_egl_draw(VirtualConsole *vc)
         vc->gfx.scale_x = (double)ww / surface_width(vc->gfx.ds);
         vc->gfx.scale_y = (double)wh / surface_height(vc->gfx.ds);
     }
+
+    glFlush();
+    graphic_hw_gl_flushed(vc->gfx.dcl.con);
 }
 
 void gd_egl_update(DisplayChangeListener *dcl,
diff --git a/ui/gtk-gl-area.c b/ui/gtk-gl-area.c
index 72bcd949180f..e7ca73c7b1b3 100644
--- a/ui/gtk-gl-area.c
+++ b/ui/gtk-gl-area.c
@@ -70,6 +70,9 @@ void gd_gl_area_draw(VirtualConsole *vc)
         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
     }
+
+    glFlush();
+    graphic_hw_gl_flushed(vc->gfx.dcl.con);
 }
 
 void gd_gl_area_update(DisplayChangeListener *dcl,
diff --git a/ui/sdl2-gl.c b/ui/sdl2-gl.c
index 82139ba49e8f..fd594d746110 100644
--- a/ui/sdl2-gl.c
+++ b/ui/sdl2-gl.c
@@ -58,6 +58,7 @@ static void sdl2_gl_render_surface(struct sdl2_console *scon)
 
     surface_gl_render_texture(scon->gls, scon->surface);
     SDL_GL_SwapWindow(scon->real_window);
+    graphic_hw_gl_flushed(scon->dcl.con);
 }
 
 void sdl2_gl_update(DisplayChangeListener *dcl,
@@ -240,4 +241,5 @@ void sdl2_gl_scanout_flush(DisplayChangeListener *dcl,
     egl_fb_blit(&scon->win_fb, &scon->guest_fb, !scon->y0_top);
 
     SDL_GL_SwapWindow(scon->real_window);
+    graphic_hw_gl_flushed(dcl->con);
 }
diff --git a/ui/spice-display.c b/ui/spice-display.c
index dccac4710a5e..6f32b66a6e75 100644
--- a/ui/spice-display.c
+++ b/ui/spice-display.c
@@ -826,6 +826,7 @@ static void qemu_spice_gl_unblock_bh(void *opaque)
     SimpleSpiceDisplay *ssd = opaque;
 
     qemu_spice_gl_block(ssd, false);
+    graphic_hw_gl_flushed(ssd->dcl.con);
 }
 
 static void qemu_spice_gl_block_timer(void *opaque)
-- 
2.29.2

[PULL 23/24] chardev: check if the chardev is registered for yanking

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Not all chardevs are created via qmp_chardev_open_socket(), and those
should not call the yank function registration, as this will eventually
assert() not being registered.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-20-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 chardev/char-socket.c | 53 +++++++++++++++++++++++++++----------------
 1 file changed, 33 insertions(+), 20 deletions(-)

diff --git a/chardev/char-socket.c b/chardev/char-socket.c
index 8a707d766c16..9061981f6d3e 100644
--- a/chardev/char-socket.c
+++ b/chardev/char-socket.c
@@ -417,8 +417,9 @@ static void tcp_chr_free_connection(Chardev *chr)
 
     tcp_set_msgfds(chr, NULL, 0);
     remove_fd_in_watch(chr);
-    if (s->state == TCP_CHARDEV_STATE_CONNECTING
-        || s->state == TCP_CHARDEV_STATE_CONNECTED) {
+    if (s->registered_yank &&
+        (s->state == TCP_CHARDEV_STATE_CONNECTING
+        || s->state == TCP_CHARDEV_STATE_CONNECTED)) {
         yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label),
                                  yank_generic_iochannel,
                                  QIO_CHANNEL(s->sioc));
@@ -940,9 +941,11 @@ static int tcp_chr_add_client(Chardev *chr, int fd)
     }
     tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
     tcp_chr_set_client_ioc_name(chr, sioc);
-    yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
-                           yank_generic_iochannel,
-                           QIO_CHANNEL(sioc));
+    if (s->registered_yank) {
+        yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
+                               yank_generic_iochannel,
+                               QIO_CHANNEL(sioc));
+    }
     ret = tcp_chr_new_client(chr, sioc);
     object_unref(OBJECT(sioc));
     return ret;
@@ -957,9 +960,11 @@ static void tcp_chr_accept(QIONetListener *listener,
 
     tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
     tcp_chr_set_client_ioc_name(chr, cioc);
-    yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
-                           yank_generic_iochannel,
-                           QIO_CHANNEL(cioc));
+    if (s->registered_yank) {
+        yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
+                               yank_generic_iochannel,
+                               QIO_CHANNEL(cioc));
+    }
     tcp_chr_new_client(chr, cioc);
 }
 
@@ -975,9 +980,11 @@ static int tcp_chr_connect_client_sync(Chardev *chr, Error **errp)
         object_unref(OBJECT(sioc));
         return -1;
     }
-    yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
-                           yank_generic_iochannel,
-                           QIO_CHANNEL(sioc));
+    if (s->registered_yank) {
+        yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
+                               yank_generic_iochannel,
+                               QIO_CHANNEL(sioc));
+    }
     tcp_chr_new_client(chr, sioc);
     object_unref(OBJECT(sioc));
     return 0;
@@ -993,9 +1000,11 @@ static void tcp_chr_accept_server_sync(Chardev *chr)
     tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
     sioc = qio_net_listener_wait_client(s->listener);
     tcp_chr_set_client_ioc_name(chr, sioc);
-    yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
-                           yank_generic_iochannel,
-                           QIO_CHANNEL(sioc));
+    if (s->registered_yank) {
+        yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
+                               yank_generic_iochannel,
+                               QIO_CHANNEL(sioc));
+    }
     tcp_chr_new_client(chr, sioc);
     object_unref(OBJECT(sioc));
 }
@@ -1124,9 +1133,11 @@ static void qemu_chr_socket_connected(QIOTask *task, void *opaque)
 
     if (qio_task_propagate_error(task, &err)) {
         tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED);
-        yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label),
-                                 yank_generic_iochannel,
-                                 QIO_CHANNEL(sioc));
+        if (s->registered_yank) {
+            yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label),
+                                     yank_generic_iochannel,
+                                     QIO_CHANNEL(sioc));
+        }
         check_report_connect_error(chr, err);
         goto cleanup;
     }
@@ -1160,9 +1171,11 @@ static void tcp_chr_connect_client_async(Chardev *chr)
     tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
     sioc = qio_channel_socket_new();
     tcp_chr_set_client_ioc_name(chr, sioc);
-    yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
-                           yank_generic_iochannel,
-                           QIO_CHANNEL(sioc));
+    if (s->registered_yank) {
+        yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
+                               yank_generic_iochannel,
+                               QIO_CHANNEL(sioc));
+    }
     /*
      * Normally code would use the qio_channel_socket_connect_async
      * method which uses a QIOTask + qio_task_set_error internally
-- 
2.29.2

[PULL 24/24] tests: add some virtio-gpu & vhost-user-gpu acceptance test

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

This will check virtio/vhost-user-vga & virgl are correctly initialized
by the Linux kernel on an egl-headless display.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-21-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 tests/acceptance/virtio-gpu.py | 161 +++++++++++++++++++++++++++++++++
 1 file changed, 161 insertions(+)
 create mode 100644 tests/acceptance/virtio-gpu.py

diff --git a/tests/acceptance/virtio-gpu.py b/tests/acceptance/virtio-gpu.py
new file mode 100644
index 000000000000..211f02932f27
--- /dev/null
+++ b/tests/acceptance/virtio-gpu.py
@@ -0,0 +1,161 @@
+# virtio-gpu tests
+#
+# This work is licensed under the terms of the GNU GPL, version 2 or
+# later.  See the COPYING file in the top-level directory.
+
+
+from avocado_qemu import Test
+from avocado_qemu import BUILD_DIR
+from avocado_qemu import wait_for_console_pattern
+from avocado_qemu import exec_command_and_wait_for_pattern
+from avocado_qemu import is_readable_executable_file
+
+from qemu.accel import kvm_available
+
+import os
+import socket
+import subprocess
+
+
+ACCEL_NOT_AVAILABLE_FMT = "%s accelerator does not seem to be available"
+KVM_NOT_AVAILABLE = ACCEL_NOT_AVAILABLE_FMT % "KVM"
+
+
+def pick_default_vug_bin():
+    relative_path = "./contrib/vhost-user-gpu/vhost-user-gpu"
+    if is_readable_executable_file(relative_path):
+        return relative_path
+
+    bld_dir_path = os.path.join(BUILD_DIR, relative_path)
+    if is_readable_executable_file(bld_dir_path):
+        return bld_dir_path
+
+
+class VirtioGPUx86(Test):
+    """
+    :avocado: tags=virtio-gpu
+    """
+
+    KERNEL_COMMON_COMMAND_LINE = "printk.time=0 "
+    KERNEL_URL = (
+        "https://archives.fedoraproject.org/pub/fedora"
+        "/linux/releases/33/Everything/x86_64/os/images"
+        "/pxeboot/vmlinuz"
+    )
+    INITRD_URL = (
+        "https://archives.fedoraproject.org/pub/fedora"
+        "/linux/releases/33/Everything/x86_64/os/images"
+        "/pxeboot/initrd.img"
+    )
+
+    def wait_for_console_pattern(self, success_message, vm=None):
+        wait_for_console_pattern(
+            self,
+            success_message,
+            failure_message="Kernel panic - not syncing",
+            vm=vm,
+        )
+
+    def test_virtio_vga_virgl(self):
+        """
+        :avocado: tags=arch:x86_64
+        :avocado: tags=device:virtio-vga
+        """
+        kernel_command_line = (
+            self.KERNEL_COMMON_COMMAND_LINE + "console=ttyS0 rdinit=/bin/bash"
+        )
+        # FIXME: should check presence of virtio, virgl etc
+        if not kvm_available(self.arch, self.qemu_bin):
+            self.cancel(KVM_NOT_AVAILABLE)
+
+        kernel_path = self.fetch_asset(self.KERNEL_URL)
+        initrd_path = self.fetch_asset(self.INITRD_URL)
+
+        self.vm.set_console()
+        self.vm.add_args("-cpu", "host")
+        self.vm.add_args("-m", "2G")
+        self.vm.add_args("-machine", "pc,accel=kvm")
+        self.vm.add_args("-device", "virtio-vga,virgl=on")
+        self.vm.add_args("-display", "egl-headless")
+        self.vm.add_args(
+            "-kernel",
+            kernel_path,
+            "-initrd",
+            initrd_path,
+            "-append",
+            kernel_command_line,
+        )
+        self.vm.launch()
+        self.wait_for_console_pattern("as init process")
+        exec_command_and_wait_for_pattern(
+            self, "/usr/sbin/modprobe virtio_gpu", ""
+        )
+        self.wait_for_console_pattern("features: +virgl +edid")
+
+    def test_vhost_user_vga_virgl(self):
+        """
+        :avocado: tags=arch:x86_64
+        :avocado: tags=device:vhost-user-vga
+        """
+        kernel_command_line = (
+            self.KERNEL_COMMON_COMMAND_LINE + "console=ttyS0 rdinit=/bin/bash"
+        )
+        # FIXME: should check presence of vhost-user-gpu, virgl, memfd etc
+        if not kvm_available(self.arch, self.qemu_bin):
+            self.cancel(KVM_NOT_AVAILABLE)
+
+        vug = pick_default_vug_bin()
+        if not vug:
+            self.cancel("Could not find vhost-user-gpu")
+
+        kernel_path = self.fetch_asset(self.KERNEL_URL)
+        initrd_path = self.fetch_asset(self.INITRD_URL)
+
+        # Create socketpair to connect proxy and remote processes
+        qemu_sock, vug_sock = socket.socketpair(
+            socket.AF_UNIX, socket.SOCK_STREAM
+        )
+        os.set_inheritable(qemu_sock.fileno(), True)
+        os.set_inheritable(vug_sock.fileno(), True)
+
+        self._vug_log_path = os.path.join(
+            self.vm._test_dir, "vhost-user-gpu.log"
+        )
+        self._vug_log_file = open(self._vug_log_path, "wb")
+        print(self._vug_log_path)
+
+        vugp = subprocess.Popen(
+            [vug, "--virgl", "--fd=%d" % vug_sock.fileno()],
+            stdin=subprocess.DEVNULL,
+            stdout=self._vug_log_file,
+            stderr=subprocess.STDOUT,
+            shell=False,
+            close_fds=False,
+        )
+
+        self.vm.set_console()
+        self.vm.add_args("-cpu", "host")
+        self.vm.add_args("-m", "2G")
+        self.vm.add_args("-object", "memory-backend-memfd,id=mem,size=2G")
+        self.vm.add_args("-machine", "pc,memory-backend=mem,accel=kvm")
+        self.vm.add_args("-chardev", "socket,id=vug,fd=%d" % qemu_sock.fileno())
+        self.vm.add_args("-device", "vhost-user-vga,chardev=vug")
+        self.vm.add_args("-display", "egl-headless")
+        self.vm.add_args(
+            "-kernel",
+            kernel_path,
+            "-initrd",
+            initrd_path,
+            "-append",
+            kernel_command_line,
+        )
+        self.vm.launch()
+        self.wait_for_console_pattern("as init process")
+        exec_command_and_wait_for_pattern(
+            self, "/usr/sbin/modprobe virtio_gpu", ""
+        )
+        self.wait_for_console_pattern("features: +virgl -edid")
+        self.vm.shutdown()
+        qemu_sock.close()
+        vugp.terminate()
+        vugp.wait()
-- 
2.29.2

Re: [PULL 00/24] Vga ui 20210205 patches

[Peter Maydell]

On Fri, 5 Feb 2021 at 06:58, Gerd Hoffmann <kraxel@redhat.com> wrote:
>
> The following changes since commit db754f8ccaf2f073c9aed46a4389e9c0c2080399:
>
>   Merge remote-tracking branch 'remotes/rth-gitlab/tags/pull-tcg-20210202' in=
> to staging (2021-02-03 19:35:57 +0000)
>
> are available in the Git repository at:
>
>   git://git.kraxel.org/qemu tags/vga-ui-20210205-pull-request
>
> for you to fetch changes up to 73240f104dd0169b0637e46fae3c2c39cdfb2eb9:
>
>   tests: add some virtio-gpu & vhost-user-gpu acceptance test (2021-02-04 15:=
> 58:54 +0100)
>
> ----------------------------------------------------------------
> ui+virtio-gpu: opengl cleanups and fixes.
> qxl+spice: bugfixes
>


Applied, thanks.

Please update the changelog at https://wiki.qemu.org/ChangeLog/6.0
for any user-visible changes.

-- PMM