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ui/console: Use qemu_dmabuf_new() and free() helpers instead

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This commit introduces utility functions for the creation and deallocation
of QemuDmaBuf instances. Additionally, it updates all relevant sections
of the codebase to utilize these new utility functions.

v7: remove prefix, "dpy_gl_" from all helpers
    qemu_dmabuf_free() returns without doing anything if input is null
    (Daniel P. Berrangé <berrange@redhat.com>)
    call G_DEFINE_AUTOPTR_CLEANUP_FUNC for qemu_dmabuf_free()
    (Daniel P. Berrangé <berrange@redhat.com>)

v8: Introduction of helpers was removed as those were already added
    by the previous commit

v9: set dmabuf->allow_fences to 'true' when dmabuf is created in
    virtio_gpu_create_dmabuf()/virtio-gpu-udmabuf.c

    removed unnecessary spaces were accidently added in the patch,
    'ui/console: Use qemu_dmabuf_new() a...'

v11: Calling qemu_dmabuf_close was removed as closing dmabuf->fd will be
     done in qemu_dmabuf_free anyway.
     (Daniel P. Berrangé <berrange@redhat.com>)

v12: --- Calling qemu_dmabuf_close separately as qemu_dmabuf_free doesn't
         do it.

     --- 'dmabuf' is now allocated space so it should be freed at the end of
         dbus_scanout_texture

v13: --- Immediately free dmabuf after it is released to prevent possible
         leaking of the ptr
         (Marc-André Lureau <marcandre.lureau@redhat.com>)

     --- Use g_autoptr macro to define *dmabuf for auto clean up instead of
         calling qemu_dmabuf_free
         (Marc-André Lureau <marcandre.lureau@redhat.com>)

v14: --- (vhost-user-gpu) Change qemu_dmabuf_free back to g_clear_pointer
         as it was done because of some misunderstanding (v13).

     --- (vhost-user-gpu) g->dmabuf[m->scanout_id] needs to be set to NULL
         to prevent freed dmabuf to be accessed again in case if(fd==-1)break;
         happens (before new dmabuf is allocated). Otherwise, it would cause
         invalid memory access when the same function is executed. Also NULL
         check should be done before qemu_dmabuf_close (it asserts dmabuf!=NULL.).
         (Marc-André Lureau <marcandre.lureau@redhat.com>)

Suggested-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Cc: Philippe Mathieu-Daudé <philmd@linaro.org>
Cc: Daniel P. Berrangé <berrange@redhat.com>
Cc: Vivek Kasireddy <vivek.kasireddy@intel.com>
Signed-off-by: Dongwon Kim <dongwon.kim@intel.com>
Message-Id: <20240508175403.3399895-6-dongwon.kim@intel.com>
This commit is contained in:
Dongwon Kim 2024-05-08 10:54:02 -07:00 committed by Marc-André Lureau
parent fa6426805b
commit c0fcd6334f
6 changed files with 61 additions and 66 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

43
hw/display/vhost-user-gpu.c
View file

@ -249,6 +249,7 @@ vhost_user_gpu_handle_display(VhostUserGPU *g, VhostUserGpuMsg *msg)
case VHOST_USER_GPU_DMABUF_SCANOUT: {
VhostUserGpuDMABUFScanout *m = &msg->payload.dmabuf_scanout;
int fd = qemu_chr_fe_get_msgfd(&g->vhost_chr);
uint64_t modifier = 0;
QemuDmaBuf *dmabuf;
if (m->scanout_id >= g->parent_obj.conf.max_outputs) {
@ -261,27 +262,33 @@ vhost_user_gpu_handle_display(VhostUserGPU *g, VhostUserGpuMsg *msg)
g->parent_obj.enable = 1;
con = g->parent_obj.scanout[m->scanout_id].con;
dmabuf = &g->dmabuf[m->scanout_id];
qemu_dmabuf_close(dmabuf);
dpy_gl_release_dmabuf(con, dmabuf);
if (fd == -1) {
dpy_gl_scanout_disable(con);
break;
}
*dmabuf = (QemuDmaBuf) {
.fd = fd,
.width = m->fd_width,
.height = m->fd_height,
.stride = m->fd_stride,
.fourcc = m->fd_drm_fourcc,
.y0_top = m->fd_flags & VIRTIO_GPU_RESOURCE_FLAG_Y_0_TOP,
};
if (msg->request == VHOST_USER_GPU_DMABUF_SCANOUT2) {
VhostUserGpuDMABUFScanout2 *m2 = &msg->payload.dmabuf_scanout2;
dmabuf->modifier = m2->modifier;
dmabuf = g->dmabuf[m->scanout_id];
if (dmabuf) {
qemu_dmabuf_close(dmabuf);
dpy_gl_release_dmabuf(con, dmabuf);
g_clear_pointer(&dmabuf, qemu_dmabuf_free);
}
if (fd == -1) {
dpy_gl_scanout_disable(con);
g->dmabuf[m->scanout_id] = NULL;
break;
}
if (msg->request == VHOST_USER_GPU_DMABUF_SCANOUT2) {
VhostUserGpuDMABUFScanout2 *m2 = &msg->payload.dmabuf_scanout2;
modifier = m2->modifier;
}
dmabuf = qemu_dmabuf_new(m->fd_width, m->fd_height,
m->fd_stride, 0, 0, 0, 0,
m->fd_drm_fourcc, modifier,
fd, false, m->fd_flags &
VIRTIO_GPU_RESOURCE_FLAG_Y_0_TOP);
dpy_gl_scanout_dmabuf(con, dmabuf);
g->dmabuf[m->scanout_id] = dmabuf;
break;
}
case VHOST_USER_GPU_DMABUF_UPDATE: {

24
hw/display/virtio-gpu-udmabuf.c
View file

@ -162,7 +162,8 @@ static void virtio_gpu_free_dmabuf(VirtIOGPU *g, VGPUDMABuf *dmabuf)
struct virtio_gpu_scanout *scanout;
scanout = &g->parent_obj.scanout[dmabuf->scanout_id];
dpy_gl_release_dmabuf(scanout->con, &dmabuf->buf);
dpy_gl_release_dmabuf(scanout->con, dmabuf->buf);
g_clear_pointer(&dmabuf->buf, qemu_dmabuf_free);
QTAILQ_REMOVE(&g->dmabuf.bufs, dmabuf, next);
g_free(dmabuf);
}
@ -181,17 +182,10 @@ static VGPUDMABuf
}
dmabuf = g_new0(VGPUDMABuf, 1);
dmabuf->buf.width = r->width;
dmabuf->buf.height = r->height;
dmabuf->buf.stride = fb->stride;
dmabuf->buf.x = r->x;
dmabuf->buf.y = r->y;
dmabuf->buf.backing_width = fb->width;
dmabuf->buf.backing_height = fb->height;
dmabuf->buf.fourcc = qemu_pixman_to_drm_format(fb->format);
dmabuf->buf.fd = res->dmabuf_fd;
dmabuf->buf.allow_fences = true;
dmabuf->buf.draw_submitted = false;
dmabuf->buf = qemu_dmabuf_new(r->width, r->height, fb->stride,
r->x, r->y, fb->width, fb->height,
qemu_pixman_to_drm_format(fb->format),
0, res->dmabuf_fd, true, false);
dmabuf->scanout_id = scanout_id;
QTAILQ_INSERT_HEAD(&g->dmabuf.bufs, dmabuf, next);
@ -217,11 +211,11 @@ int virtio_gpu_update_dmabuf(VirtIOGPU *g,
old_primary = g->dmabuf.primary[scanout_id];
}
width = qemu_dmabuf_get_width(&new_primary->buf);
height = qemu_dmabuf_get_height(&new_primary->buf);
width = qemu_dmabuf_get_width(new_primary->buf);
height = qemu_dmabuf_get_height(new_primary->buf);
g->dmabuf.primary[scanout_id] = new_primary;
qemu_console_resize(scanout->con, width, height);
dpy_gl_scanout_dmabuf(scanout->con, &new_primary->buf);
dpy_gl_scanout_dmabuf(scanout->con, new_primary->buf);
if (old_primary) {
virtio_gpu_free_dmabuf(g, old_primary);

26
hw/vfio/display.c
View file

@ -241,14 +241,11 @@ static VFIODMABuf *vfio_display_get_dmabuf(VFIOPCIDevice *vdev,
dmabuf = g_new0(VFIODMABuf, 1);
dmabuf->dmabuf_id = plane.dmabuf_id;
dmabuf->buf.width = plane.width;
dmabuf->buf.height = plane.height;
dmabuf->buf.backing_width = plane.width;
dmabuf->buf.backing_height = plane.height;
dmabuf->buf.stride = plane.stride;
dmabuf->buf.fourcc = plane.drm_format;
dmabuf->buf.modifier = plane.drm_format_mod;
dmabuf->buf.fd = fd;
dmabuf->buf = qemu_dmabuf_new(plane.width, plane.height,
plane.stride, 0, 0, plane.width,
plane.height, plane.drm_format,
plane.drm_format_mod, fd, false, false);
if (plane_type == DRM_PLANE_TYPE_CURSOR) {
vfio_display_update_cursor(dmabuf, &plane);
}
@ -261,8 +258,9 @@ static void vfio_display_free_one_dmabuf(VFIODisplay *dpy, VFIODMABuf *dmabuf)
{
QTAILQ_REMOVE(&dpy->dmabuf.bufs, dmabuf, next);
qemu_dmabuf_close(&dmabuf->buf);
dpy_gl_release_dmabuf(dpy->con, &dmabuf->buf);
qemu_dmabuf_close(dmabuf->buf);
dpy_gl_release_dmabuf(dpy->con, dmabuf->buf);
g_clear_pointer(&dmabuf->buf, qemu_dmabuf_free);
g_free(dmabuf);
}
@ -298,13 +296,13 @@ static void vfio_display_dmabuf_update(void *opaque)
return;
}
width = qemu_dmabuf_get_width(&primary->buf);
height = qemu_dmabuf_get_height(&primary->buf);
width = qemu_dmabuf_get_width(primary->buf);
height = qemu_dmabuf_get_height(primary->buf);
if (dpy->dmabuf.primary != primary) {
dpy->dmabuf.primary = primary;
qemu_console_resize(dpy->con, width, height);
dpy_gl_scanout_dmabuf(dpy->con, &primary->buf);
dpy_gl_scanout_dmabuf(dpy->con, primary->buf);
free_bufs = true;
}
@ -318,7 +316,7 @@ static void vfio_display_dmabuf_update(void *opaque)
if (cursor && (new_cursor || cursor->hot_updates)) {
bool have_hot = (cursor->hot_x != 0xffffffff &&
cursor->hot_y != 0xffffffff);
dpy_gl_cursor_dmabuf(dpy->con, &cursor->buf, have_hot,
dpy_gl_cursor_dmabuf(dpy->con, cursor->buf, have_hot,
cursor->hot_x, cursor->hot_y);
cursor->hot_updates = 0;
} else if (!cursor && new_cursor) {

2
include/hw/vfio/vfio-common.h
View file

@ -148,7 +148,7 @@ typedef struct VFIOGroup {
} VFIOGroup;
typedef struct VFIODMABuf {
QemuDmaBuf buf;
QemuDmaBuf *buf;
uint32_t pos_x, pos_y, pos_updates;
uint32_t hot_x, hot_y, hot_updates;
int dmabuf_id;

4
include/hw/virtio/virtio-gpu.h
View file

@ -169,7 +169,7 @@ struct VirtIOGPUBaseClass {
DEFINE_PROP_UINT32("yres", _state, _conf.yres, 800)
typedef struct VGPUDMABuf {
QemuDmaBuf buf;
QemuDmaBuf *buf;
uint32_t scanout_id;
QTAILQ_ENTRY(VGPUDMABuf) next;
} VGPUDMABuf;
@ -238,7 +238,7 @@ struct VhostUserGPU {
VhostUserBackend *vhost;
int vhost_gpu_fd; /* closed by the chardev */
CharBackend vhost_chr;
QemuDmaBuf dmabuf[VIRTIO_GPU_MAX_SCANOUTS];
QemuDmaBuf *dmabuf[VIRTIO_GPU_MAX_SCANOUTS];
bool backend_blocked;
};

28
ui/dbus-listener.c
View file

@ -442,28 +442,24 @@ static void dbus_scanout_texture(DisplayChangeListener *dcl,
trace_dbus_scanout_texture(tex_id, backing_y_0_top,
backing_width, backing_height, x, y, w, h);
#ifdef CONFIG_GBM
QemuDmaBuf dmabuf = {
.width = w,
.height = h,
.y0_top = backing_y_0_top,
.x = x,
.y = y,
.backing_width = backing_width,
.backing_height = backing_height,
};
g_autoptr(QemuDmaBuf) dmabuf = NULL;
int fd;
uint32_t stride, fourcc;
uint64_t modifier;
assert(tex_id);
dmabuf.fd = egl_get_fd_for_texture(
tex_id, (EGLint *)&dmabuf.stride,
(EGLint *)&dmabuf.fourcc,
&dmabuf.modifier);
if (dmabuf.fd < 0) {
fd = egl_get_fd_for_texture(tex_id, (EGLint *)&stride, (EGLint *)&fourcc,
&modifier);
if (fd < 0) {
error_report("%s: failed to get fd for texture", __func__);
return;
}
dmabuf = qemu_dmabuf_new(w, h, stride, x, y, backing_width,
backing_height, fourcc, modifier, fd,
false, backing_y_0_top);
dbus_scanout_dmabuf(dcl, &dmabuf);
close(dmabuf.fd);
dbus_scanout_dmabuf(dcl, dmabuf);
qemu_dmabuf_close(dmabuf);
#endif
#ifdef WIN32