Merge remote-tracking branch 'remotes/spice/tags/pull-spice-20160223-1' into staging

spice: initial opengl/virgl support, postcopy migration fix.

# gpg: Signature made Tue 23 Feb 2016 12:30:40 GMT using RSA key ID D3E87138
# 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>"

* remotes/spice/tags/pull-spice-20160223-1:
  Postcopy+spice: Pass spice migration data earlier
  spice/gl: tweak debug messages.
  spice/gl: add unblock timer
  spice: add opengl/virgl/dmabuf support
  spice: reset cursor on resize
  egl-helpers: add functions for render nodes and dma-buf passing
  configure: add dma-buf support detection.
  spice: init dcl before registering qxl interface

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

3 files changed, 287 insertions, 12 deletions

diff --git a/ui/egl-helpers.c b/ui/egl-helpers.c
index 4c83834615..54be44ccea 100644
--- a/ui/egl-helpers.c
+++ b/ui/egl-helpers.c
@@ -1,6 +1,8 @@
 #include "qemu/osdep.h"
 #include <glob.h>
+#include <dirent.h>
 
+#include "config-host.h"
 #include "ui/egl-helpers.h"
 
 EGLDisplay *qemu_egl_display;
@@ -20,6 +22,133 @@ static int egl_debug;
 
 /* ---------------------------------------------------------------------- */
 
+#ifdef CONFIG_OPENGL_DMABUF
+
+int qemu_egl_rn_fd;
+struct gbm_device *qemu_egl_rn_gbm_dev;
+EGLContext qemu_egl_rn_ctx;
+
+int qemu_egl_rendernode_open(void)
+{
+    DIR *dir;
+    struct dirent *e;
+    int r, fd;
+    char *p;
+
+    dir = opendir("/dev/dri");
+    if (!dir) {
+        return -1;
+    }
+
+    fd = -1;
+    while ((e = readdir(dir))) {
+        if (e->d_type != DT_CHR) {
+            continue;
+        }
+
+        if (strncmp(e->d_name, "renderD", 7)) {
+            continue;
+        }
+
+        r = asprintf(&p, "/dev/dri/%s", e->d_name);
+        if (r < 0) {
+            return -1;
+        }
+
+        r = open(p, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
+        if (r < 0) {
+            free(p);
+            continue;
+        }
+        fd = r;
+        free(p);
+        break;
+    }
+
+    closedir(dir);
+    if (fd < 0) {
+        return -1;
+    }
+    return fd;
+}
+
+int egl_rendernode_init(void)
+{
+    qemu_egl_rn_fd = -1;
+
+    qemu_egl_rn_fd = qemu_egl_rendernode_open();
+    if (qemu_egl_rn_fd == -1) {
+        fprintf(stderr, "egl: no drm render node available\n");
+        goto err;
+    }
+
+    qemu_egl_rn_gbm_dev = gbm_create_device(qemu_egl_rn_fd);
+    if (!qemu_egl_rn_gbm_dev) {
+        fprintf(stderr, "egl: gbm_create_device failed\n");
+        goto err;
+    }
+
+    qemu_egl_init_dpy((EGLNativeDisplayType)qemu_egl_rn_gbm_dev, false, false);
+
+    if (!epoxy_has_egl_extension(qemu_egl_display,
+                                 "EGL_KHR_surfaceless_context")) {
+        fprintf(stderr, "egl: EGL_KHR_surfaceless_context not supported\n");
+        goto err;
+    }
+    if (!epoxy_has_egl_extension(qemu_egl_display,
+                                 "EGL_MESA_image_dma_buf_export")) {
+        fprintf(stderr, "egl: EGL_MESA_image_dma_buf_export not supported\n");
+        goto err;
+    }
+
+    qemu_egl_rn_ctx = qemu_egl_init_ctx();
+    if (!qemu_egl_rn_ctx) {
+        fprintf(stderr, "egl: egl_init_ctx failed\n");
+        goto err;
+    }
+
+    return 0;
+
+err:
+    if (qemu_egl_rn_gbm_dev) {
+        gbm_device_destroy(qemu_egl_rn_gbm_dev);
+    }
+    if (qemu_egl_rn_fd != -1) {
+        close(qemu_egl_rn_fd);
+    }
+
+    return -1;
+}
+
+int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc)
+{
+    EGLImageKHR image;
+    EGLint num_planes, fd;
+
+    image = eglCreateImageKHR(qemu_egl_display, eglGetCurrentContext(),
+                              EGL_GL_TEXTURE_2D_KHR,
+                              (EGLClientBuffer)(unsigned long)tex_id,
+                              NULL);
+    if (!image) {
+        return -1;
+    }
+
+    eglExportDMABUFImageQueryMESA(qemu_egl_display, image, fourcc,
+                                  &num_planes, NULL);
+    if (num_planes != 1) {
+        eglDestroyImageKHR(qemu_egl_display, image);
+        return -1;
+    }
+    eglExportDMABUFImageMESA(qemu_egl_display, image, &fd, stride, NULL);
+    eglDestroyImageKHR(qemu_egl_display, image);
+
+    return fd;
+}
+
+#endif /* CONFIG_OPENGL_DMABUF */
+
+/* ---------------------------------------------------------------------- */
+
 EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, Window win)
 {
     EGLSurface esurface;
diff --git a/ui/spice-core.c b/ui/spice-core.c
index 4dbd99ab19..a68a665a9a 100644
--- a/ui/spice-core.c
+++ b/ui/spice-core.c
@@ -494,9 +494,14 @@ static QemuOptsList qemu_spice_opts = {
         },{
             .name = "playback-compression",
             .type = QEMU_OPT_BOOL,
-        }, {
+        },{
             .name = "seamless-migration",
             .type = QEMU_OPT_BOOL,
+#ifdef HAVE_SPICE_GL
+        },{
+            .name = "gl",
+            .type = QEMU_OPT_BOOL,
+#endif
         },
         { /* end of list */ }
     },
@@ -568,7 +573,8 @@ static void migration_state_notifier(Notifier *notifier, void *data)
 
     if (migration_in_setup(s)) {
         spice_server_migrate_start(spice_server);
-    } else if (migration_has_finished(s)) {
+    } else if (migration_has_finished(s) ||
+               migration_in_postcopy_after_devices(s)) {
         spice_server_migrate_end(spice_server, true);
         spice_have_target_host = false;
     } else if (migration_has_failed(s)) {
@@ -819,6 +825,14 @@ void qemu_spice_init(void)
 #if SPICE_SERVER_VERSION >= 0x000c02
     qemu_spice_register_ports();
 #endif
+
+#ifdef HAVE_SPICE_GL
+    if (qemu_opt_get_bool(opts, "gl", 0)) {
+        if (egl_rendernode_init() == 0) {
+            display_opengl = 1;
+        }
+    }
+#endif
 }
 
 int qemu_spice_add_interface(SpiceBaseInstance *sin)
diff --git a/ui/spice-display.c b/ui/spice-display.c
index 8a5b3258bd..242ab5f468 100644
--- a/ui/spice-display.c
+++ b/ui/spice-display.c
@@ -460,6 +460,13 @@ void qemu_spice_display_switch(SimpleSpiceDisplay *ssd,
 
     memset(&ssd->dirty, 0, sizeof(ssd->dirty));
     ssd->notify++;
+
+    qemu_mutex_lock(&ssd->lock);
+    if (ssd->cursor) {
+        g_free(ssd->ptr_define);
+        ssd->ptr_define = qemu_spice_create_cursor_update(ssd, ssd->cursor, 0);
+    }
+    qemu_mutex_unlock(&ssd->lock);
 }
 
 static void qemu_spice_cursor_refresh_unlocked(SimpleSpiceDisplay *ssd)
@@ -467,8 +474,6 @@ static void qemu_spice_cursor_refresh_unlocked(SimpleSpiceDisplay *ssd)
     if (ssd->cursor) {
         assert(ssd->dcl.con);
         dpy_cursor_define(ssd->dcl.con, ssd->cursor);
-        cursor_put(ssd->cursor);
-        ssd->cursor = NULL;
     }
     if (ssd->mouse_x != -1 && ssd->mouse_y != -1) {
         assert(ssd->dcl.con);
@@ -563,7 +568,7 @@ static int interface_get_command(QXLInstance *sin, QXLCommandExt *ext)
 
 static int interface_req_cmd_notification(QXLInstance *sin)
 {
-    dprint(1, "%s/%d:\n", __func__, sin->id);
+    dprint(2, "%s/%d:\n", __func__, sin->id);
     return 1;
 }
 
@@ -616,7 +621,7 @@ static int interface_get_cursor_command(QXLInstance *sin, QXLCommandExt *ext)
 
 static int interface_req_cursor_notification(QXLInstance *sin)
 {
-    dprint(1, "%s:\n", __FUNCTION__);
+    dprint(2, "%s:\n", __func__);
     return 1;
 }
 
@@ -645,9 +650,23 @@ static void interface_update_area_complete(QXLInstance *sin,
 /* called from spice server thread context only */
 static void interface_async_complete(QXLInstance *sin, uint64_t cookie_token)
 {
-    /* should never be called, used in qxl native mode only */
-    fprintf(stderr, "%s: abort()\n", __func__);
-    abort();
+    QXLCookie *cookie = (QXLCookie *)(uintptr_t)cookie_token;
+
+    switch (cookie->type) {
+#ifdef HAVE_SPICE_GL
+    case QXL_COOKIE_TYPE_GL_DRAW_DONE:
+    {
+        SimpleSpiceDisplay *ssd = container_of(sin, SimpleSpiceDisplay, qxl);
+        qemu_bh_schedule(ssd->gl_unblock_bh);
+        break;
+    }
+#endif
+    default:
+        /* should never be called, used in qxl native mode only */
+        fprintf(stderr, "%s: abort()\n", __func__);
+        abort();
+    }
+    g_free(cookie);
 }
 
 static void interface_set_client_capabilities(QXLInstance *sin,
@@ -750,6 +769,11 @@ static void display_mouse_define(DisplayChangeListener *dcl,
     SimpleSpiceDisplay *ssd = container_of(dcl, SimpleSpiceDisplay, dcl);
 
     qemu_mutex_lock(&ssd->lock);
+    if (c) {
+        cursor_get(c);
+    }
+    cursor_put(ssd->cursor);
+    ssd->cursor = c;
     ssd->hot_x = c->hot_x;
     ssd->hot_y = c->hot_y;
     g_free(ssd->ptr_move);
@@ -769,20 +793,128 @@ static const DisplayChangeListenerOps display_listener_ops = {
     .dpy_cursor_define    = display_mouse_define,
 };
 
+#ifdef HAVE_SPICE_GL
+
+static void qemu_spice_gl_block(SimpleSpiceDisplay *ssd, bool block)
+{
+    uint64_t timeout;
+
+    if (block) {
+        timeout = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
+        timeout += 1000; /* one sec */
+        timer_mod(ssd->gl_unblock_timer, timeout);
+    } else {
+        timer_del(ssd->gl_unblock_timer);
+    }
+    graphic_hw_gl_block(ssd->dcl.con, block);
+}
+
+static void qemu_spice_gl_unblock_bh(void *opaque)
+{
+    SimpleSpiceDisplay *ssd = opaque;
+
+    qemu_spice_gl_block(ssd, false);
+}
+
+static void qemu_spice_gl_block_timer(void *opaque)
+{
+    fprintf(stderr, "WARNING: spice: no gl-draw-done within one second\n");
+}
+
+static QEMUGLContext qemu_spice_gl_create_context(DisplayChangeListener *dcl,
+                                                  QEMUGLParams *params)
+{
+    eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
+                   qemu_egl_rn_ctx);
+    return qemu_egl_create_context(dcl, params);
+}
+
+static void qemu_spice_gl_scanout(DisplayChangeListener *dcl,
+                                  uint32_t tex_id,
+                                  bool y_0_top,
+                                  uint32_t x, uint32_t y,
+                                  uint32_t w, uint32_t h)
+{
+    SimpleSpiceDisplay *ssd = container_of(dcl, SimpleSpiceDisplay, dcl);
+    EGLint stride = 0, fourcc = 0;
+    int fd = -1;
+
+    if (tex_id) {
+        fd = egl_get_fd_for_texture(tex_id, &stride, &fourcc);
+        if (fd < 0) {
+            fprintf(stderr, "%s: failed to get fd for texture\n", __func__);
+            return;
+        }
+        dprint(1, "%s: %dx%d (stride %d, fourcc 0x%x)\n", __func__,
+               w, h, stride, fourcc);
+    } else {
+        dprint(1, "%s: no texture (no framebuffer)\n", __func__);
+    }
+
+    assert(!tex_id || fd >= 0);
+
+    /* note: spice server will close the fd */
+    spice_qxl_gl_scanout(&ssd->qxl, fd,
+                         surface_width(ssd->ds),
+                         surface_height(ssd->ds),
+                         stride, fourcc, y_0_top);
+}
+
+static void qemu_spice_gl_update(DisplayChangeListener *dcl,
+                                 uint32_t x, uint32_t y, uint32_t w, uint32_t h)
+{
+    SimpleSpiceDisplay *ssd = container_of(dcl, SimpleSpiceDisplay, dcl);
+    uint64_t cookie;
+
+    dprint(2, "%s: %dx%d+%d+%d\n", __func__, w, h, x, y);
+    qemu_spice_gl_block(ssd, true);
+    cookie = (uintptr_t)qxl_cookie_new(QXL_COOKIE_TYPE_GL_DRAW_DONE, 0);
+    spice_qxl_gl_draw_async(&ssd->qxl, x, y, w, h, cookie);
+}
+
+static const DisplayChangeListenerOps display_listener_gl_ops = {
+    .dpy_name             = "spice-egl",
+    .dpy_gfx_update       = display_update,
+    .dpy_gfx_switch       = display_switch,
+    .dpy_gfx_check_format = qemu_pixman_check_format,
+    .dpy_refresh          = display_refresh,
+    .dpy_mouse_set        = display_mouse_set,
+    .dpy_cursor_define    = display_mouse_define,
+
+    .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          = qemu_spice_gl_scanout,
+    .dpy_gl_update           = qemu_spice_gl_update,
+};
+
+#endif /* HAVE_SPICE_GL */
+
 static void qemu_spice_display_init_one(QemuConsole *con)
 {
     SimpleSpiceDisplay *ssd = g_new0(SimpleSpiceDisplay, 1);
 
     qemu_spice_display_init_common(ssd);
 
+    ssd->dcl.ops = &display_listener_ops;
+#ifdef HAVE_SPICE_GL
+    if (display_opengl) {
+        ssd->dcl.ops = &display_listener_gl_ops;
+        ssd->dmabuf_fd = -1;
+        ssd->gl_unblock_bh = qemu_bh_new(qemu_spice_gl_unblock_bh, ssd);
+        ssd->gl_unblock_timer = timer_new_ms(QEMU_CLOCK_REALTIME,
+                                             qemu_spice_gl_block_timer, ssd);
+    }
+#endif
+    ssd->dcl.con = con;
+
     ssd->qxl.base.sif = &dpy_interface.base;
     qemu_spice_add_display_interface(&ssd->qxl, con);
     assert(ssd->worker);
-
     qemu_spice_create_host_memslot(ssd);
 
-    ssd->dcl.ops = &display_listener_ops;
-    ssd->dcl.con = con;
     register_displaychangelistener(&ssd->dcl);
 }