Hi
On Thu, Apr 25, 2024 at 5:58 AM <dongwon....@intel.com> wrote:
>
> From: Dongwon Kim <dongwon....@intel.com>
>
> 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 <berra...@redhat.com>)
> call G_DEFINE_AUTOPTR_CLEANUP_FUNC for qemu_dmabuf_free()
> (Daniel P. Berrangé <berra...@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 <berra...@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
>
> Suggested-by: Marc-André Lureau <marcandre.lur...@redhat.com>
> Cc: Philippe Mathieu-Daudé <phi...@linaro.org>
> Cc: Daniel P. Berrangé <berra...@redhat.com>
> Cc: Vivek Kasireddy <vivek.kasire...@intel.com>
> Signed-off-by: Dongwon Kim <dongwon....@intel.com>
> ---
> include/hw/vfio/vfio-common.h | 2 +-
> include/hw/virtio/virtio-gpu.h | 4 ++--
> hw/display/vhost-user-gpu.c | 21 +++++++++++----------
> hw/display/virtio-gpu-udmabuf.c | 24 +++++++++---------------
> hw/vfio/display.c | 26 ++++++++++++--------------
> ui/dbus-listener.c | 29 +++++++++++++----------------
> 6 files changed, 48 insertions(+), 58 deletions(-)
>
> diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
> index b9da6c08ef..d66e27db02 100644
> --- a/include/hw/vfio/vfio-common.h
> +++ b/include/hw/vfio/vfio-common.h
> @@ -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;
> diff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h
> index ed44cdad6b..56d6e821bf 100644
> --- a/include/hw/virtio/virtio-gpu.h
> +++ b/include/hw/virtio/virtio-gpu.h
> @@ -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;
> };
>
> diff --git a/hw/display/vhost-user-gpu.c b/hw/display/vhost-user-gpu.c
> index 454e5afcff..62e7b4376b 100644
> --- a/hw/display/vhost-user-gpu.c
> +++ b/hw/display/vhost-user-gpu.c
> @@ -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 +262,27 @@ 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];
> + dmabuf = g->dmabuf[m->scanout_id];
> qemu_dmabuf_close(dmabuf);
> dpy_gl_release_dmabuf(con, dmabuf);
> + g_clear_pointer(&dmabuf, qemu_dmabuf_free);
This will create a dangling pointer in g->dmabuf[m->scanout_id]...
> if (fd == -1) {
> dpy_gl_scanout_disable(con);
> break;
.. which may persist here
> }
> - *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;
> + 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: {
> diff --git a/hw/display/virtio-gpu-udmabuf.c b/hw/display/virtio-gpu-udmabuf.c
> index c90eba281e..c02ec6d37d 100644
> --- a/hw/display/virtio-gpu-udmabuf.c
> +++ b/hw/display/virtio-gpu-udmabuf.c
> @@ -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);
> diff --git a/hw/vfio/display.c b/hw/vfio/display.c
> index 7784502b53..fe624a6c9b 100644
> --- a/hw/vfio/display.c
> +++ b/hw/vfio/display.c
> @@ -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) {
> diff --git a/ui/dbus-listener.c b/ui/dbus-listener.c
> index 62d1e2d3f9..d72dbe832c 100644
> --- a/ui/dbus-listener.c
> +++ b/ui/dbus-listener.c
> @@ -442,28 +442,25 @@ 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,
> - };
> + int fd;
> + uint32_t stride, fourcc;
> + uint64_t modifier;
> + QemuDmaBuf *dmabuf;
>
> 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);
> + qemu_dmabuf_free(dmabuf);
it could use g_autoptr() instead, but that's ok too.
> #endif
>
> #ifdef WIN32
> --
> 2.34.1
>
looks ok otherwise
