371 lines
11 KiB
C
371 lines
11 KiB
C
/*
|
|
* display support for mdev based vgpu devices
|
|
*
|
|
* Copyright Red Hat, Inc. 2017
|
|
*
|
|
* Authors:
|
|
* Gerd Hoffmann
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2. See
|
|
* the COPYING file in the top-level directory.
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include <linux/vfio.h>
|
|
#include <sys/ioctl.h>
|
|
|
|
#include "sysemu/sysemu.h"
|
|
#include "ui/console.h"
|
|
#include "qapi/error.h"
|
|
#include "pci.h"
|
|
|
|
#ifndef DRM_PLANE_TYPE_PRIMARY
|
|
# define DRM_PLANE_TYPE_PRIMARY 1
|
|
# define DRM_PLANE_TYPE_CURSOR 2
|
|
#endif
|
|
|
|
static void vfio_display_update_cursor(VFIODMABuf *dmabuf,
|
|
struct vfio_device_gfx_plane_info *plane)
|
|
{
|
|
if (dmabuf->pos_x != plane->x_pos || dmabuf->pos_y != plane->y_pos) {
|
|
dmabuf->pos_x = plane->x_pos;
|
|
dmabuf->pos_y = plane->y_pos;
|
|
dmabuf->pos_updates++;
|
|
}
|
|
if (dmabuf->hot_x != plane->x_hot || dmabuf->hot_y != plane->y_hot) {
|
|
dmabuf->hot_x = plane->x_hot;
|
|
dmabuf->hot_y = plane->y_hot;
|
|
dmabuf->hot_updates++;
|
|
}
|
|
}
|
|
|
|
static VFIODMABuf *vfio_display_get_dmabuf(VFIOPCIDevice *vdev,
|
|
uint32_t plane_type)
|
|
{
|
|
VFIODisplay *dpy = vdev->dpy;
|
|
struct vfio_device_gfx_plane_info plane;
|
|
VFIODMABuf *dmabuf;
|
|
int fd, ret;
|
|
|
|
memset(&plane, 0, sizeof(plane));
|
|
plane.argsz = sizeof(plane);
|
|
plane.flags = VFIO_GFX_PLANE_TYPE_DMABUF;
|
|
plane.drm_plane_type = plane_type;
|
|
ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_QUERY_GFX_PLANE, &plane);
|
|
if (ret < 0) {
|
|
return NULL;
|
|
}
|
|
if (!plane.drm_format || !plane.size) {
|
|
return NULL;
|
|
}
|
|
|
|
QTAILQ_FOREACH(dmabuf, &dpy->dmabuf.bufs, next) {
|
|
if (dmabuf->dmabuf_id == plane.dmabuf_id) {
|
|
/* found in list, move to head, return it */
|
|
QTAILQ_REMOVE(&dpy->dmabuf.bufs, dmabuf, next);
|
|
QTAILQ_INSERT_HEAD(&dpy->dmabuf.bufs, dmabuf, next);
|
|
if (plane_type == DRM_PLANE_TYPE_CURSOR) {
|
|
vfio_display_update_cursor(dmabuf, &plane);
|
|
}
|
|
return dmabuf;
|
|
}
|
|
}
|
|
|
|
fd = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_GFX_DMABUF, &plane.dmabuf_id);
|
|
if (fd < 0) {
|
|
return NULL;
|
|
}
|
|
|
|
dmabuf = g_new0(VFIODMABuf, 1);
|
|
dmabuf->dmabuf_id = plane.dmabuf_id;
|
|
dmabuf->buf.width = plane.width;
|
|
dmabuf->buf.height = plane.height;
|
|
dmabuf->buf.stride = plane.stride;
|
|
dmabuf->buf.fourcc = plane.drm_format;
|
|
dmabuf->buf.fd = fd;
|
|
if (plane_type == DRM_PLANE_TYPE_CURSOR) {
|
|
vfio_display_update_cursor(dmabuf, &plane);
|
|
}
|
|
|
|
QTAILQ_INSERT_HEAD(&dpy->dmabuf.bufs, dmabuf, next);
|
|
return dmabuf;
|
|
}
|
|
|
|
static void vfio_display_free_one_dmabuf(VFIODisplay *dpy, VFIODMABuf *dmabuf)
|
|
{
|
|
QTAILQ_REMOVE(&dpy->dmabuf.bufs, dmabuf, next);
|
|
dpy_gl_release_dmabuf(dpy->con, &dmabuf->buf);
|
|
close(dmabuf->buf.fd);
|
|
g_free(dmabuf);
|
|
}
|
|
|
|
static void vfio_display_free_dmabufs(VFIOPCIDevice *vdev)
|
|
{
|
|
VFIODisplay *dpy = vdev->dpy;
|
|
VFIODMABuf *dmabuf, *tmp;
|
|
uint32_t keep = 5;
|
|
|
|
QTAILQ_FOREACH_SAFE(dmabuf, &dpy->dmabuf.bufs, next, tmp) {
|
|
if (keep > 0) {
|
|
keep--;
|
|
continue;
|
|
}
|
|
assert(dmabuf != dpy->dmabuf.primary);
|
|
vfio_display_free_one_dmabuf(dpy, dmabuf);
|
|
}
|
|
}
|
|
|
|
static void vfio_display_dmabuf_update(void *opaque)
|
|
{
|
|
VFIOPCIDevice *vdev = opaque;
|
|
VFIODisplay *dpy = vdev->dpy;
|
|
VFIODMABuf *primary, *cursor;
|
|
bool free_bufs = false, new_cursor = false;;
|
|
|
|
primary = vfio_display_get_dmabuf(vdev, DRM_PLANE_TYPE_PRIMARY);
|
|
if (primary == NULL) {
|
|
if (dpy->ramfb) {
|
|
ramfb_display_update(dpy->con, dpy->ramfb);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (dpy->dmabuf.primary != primary) {
|
|
dpy->dmabuf.primary = primary;
|
|
qemu_console_resize(dpy->con,
|
|
primary->buf.width, primary->buf.height);
|
|
dpy_gl_scanout_dmabuf(dpy->con, &primary->buf);
|
|
free_bufs = true;
|
|
}
|
|
|
|
cursor = vfio_display_get_dmabuf(vdev, DRM_PLANE_TYPE_CURSOR);
|
|
if (dpy->dmabuf.cursor != cursor) {
|
|
dpy->dmabuf.cursor = cursor;
|
|
new_cursor = true;
|
|
free_bufs = true;
|
|
}
|
|
|
|
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,
|
|
cursor->hot_x, cursor->hot_y);
|
|
cursor->hot_updates = 0;
|
|
} else if (!cursor && new_cursor) {
|
|
dpy_gl_cursor_dmabuf(dpy->con, NULL, false, 0, 0);
|
|
}
|
|
|
|
if (cursor && cursor->pos_updates) {
|
|
dpy_gl_cursor_position(dpy->con,
|
|
cursor->pos_x,
|
|
cursor->pos_y);
|
|
cursor->pos_updates = 0;
|
|
}
|
|
|
|
dpy_gl_update(dpy->con, 0, 0, primary->buf.width, primary->buf.height);
|
|
|
|
if (free_bufs) {
|
|
vfio_display_free_dmabufs(vdev);
|
|
}
|
|
}
|
|
|
|
static const GraphicHwOps vfio_display_dmabuf_ops = {
|
|
.gfx_update = vfio_display_dmabuf_update,
|
|
};
|
|
|
|
static int vfio_display_dmabuf_init(VFIOPCIDevice *vdev, Error **errp)
|
|
{
|
|
if (!display_opengl) {
|
|
error_setg(errp, "vfio-display-dmabuf: opengl not available");
|
|
return -1;
|
|
}
|
|
|
|
vdev->dpy = g_new0(VFIODisplay, 1);
|
|
vdev->dpy->con = graphic_console_init(DEVICE(vdev), 0,
|
|
&vfio_display_dmabuf_ops,
|
|
vdev);
|
|
if (vdev->enable_ramfb) {
|
|
vdev->dpy->ramfb = ramfb_setup(errp);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void vfio_display_dmabuf_exit(VFIODisplay *dpy)
|
|
{
|
|
VFIODMABuf *dmabuf;
|
|
|
|
if (QTAILQ_EMPTY(&dpy->dmabuf.bufs)) {
|
|
return;
|
|
}
|
|
|
|
while ((dmabuf = QTAILQ_FIRST(&dpy->dmabuf.bufs)) != NULL) {
|
|
vfio_display_free_one_dmabuf(dpy, dmabuf);
|
|
}
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------- */
|
|
void vfio_display_reset(VFIOPCIDevice *vdev)
|
|
{
|
|
if (!vdev || !vdev->dpy || !vdev->dpy->con ||
|
|
!vdev->dpy->dmabuf.primary) {
|
|
return;
|
|
}
|
|
|
|
dpy_gl_scanout_disable(vdev->dpy->con);
|
|
vfio_display_dmabuf_exit(vdev->dpy);
|
|
dpy_gfx_update_full(vdev->dpy->con);
|
|
}
|
|
|
|
static void vfio_display_region_update(void *opaque)
|
|
{
|
|
VFIOPCIDevice *vdev = opaque;
|
|
VFIODisplay *dpy = vdev->dpy;
|
|
struct vfio_device_gfx_plane_info plane = {
|
|
.argsz = sizeof(plane),
|
|
.flags = VFIO_GFX_PLANE_TYPE_REGION
|
|
};
|
|
pixman_format_code_t format;
|
|
int ret;
|
|
|
|
ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_QUERY_GFX_PLANE, &plane);
|
|
if (ret < 0) {
|
|
error_report("ioctl VFIO_DEVICE_QUERY_GFX_PLANE: %s",
|
|
strerror(errno));
|
|
return;
|
|
}
|
|
if (!plane.drm_format || !plane.size) {
|
|
if (dpy->ramfb) {
|
|
ramfb_display_update(dpy->con, dpy->ramfb);
|
|
}
|
|
return;
|
|
}
|
|
format = qemu_drm_format_to_pixman(plane.drm_format);
|
|
if (!format) {
|
|
return;
|
|
}
|
|
|
|
if (dpy->region.buffer.size &&
|
|
dpy->region.buffer.nr != plane.region_index) {
|
|
/* region changed */
|
|
vfio_region_exit(&dpy->region.buffer);
|
|
vfio_region_finalize(&dpy->region.buffer);
|
|
dpy->region.surface = NULL;
|
|
}
|
|
|
|
if (dpy->region.surface &&
|
|
(surface_width(dpy->region.surface) != plane.width ||
|
|
surface_height(dpy->region.surface) != plane.height ||
|
|
surface_format(dpy->region.surface) != format)) {
|
|
/* size changed */
|
|
dpy->region.surface = NULL;
|
|
}
|
|
|
|
if (!dpy->region.buffer.size) {
|
|
/* mmap region */
|
|
ret = vfio_region_setup(OBJECT(vdev), &vdev->vbasedev,
|
|
&dpy->region.buffer,
|
|
plane.region_index,
|
|
"display");
|
|
if (ret != 0) {
|
|
error_report("%s: vfio_region_setup(%d): %s",
|
|
__func__, plane.region_index, strerror(-ret));
|
|
goto err;
|
|
}
|
|
ret = vfio_region_mmap(&dpy->region.buffer);
|
|
if (ret != 0) {
|
|
error_report("%s: vfio_region_mmap(%d): %s", __func__,
|
|
plane.region_index, strerror(-ret));
|
|
goto err;
|
|
}
|
|
assert(dpy->region.buffer.mmaps[0].mmap != NULL);
|
|
}
|
|
|
|
if (dpy->region.surface == NULL) {
|
|
/* create surface */
|
|
dpy->region.surface = qemu_create_displaysurface_from
|
|
(plane.width, plane.height, format,
|
|
plane.stride, dpy->region.buffer.mmaps[0].mmap);
|
|
dpy_gfx_replace_surface(dpy->con, dpy->region.surface);
|
|
}
|
|
|
|
/* full screen update */
|
|
dpy_gfx_update(dpy->con, 0, 0,
|
|
surface_width(dpy->region.surface),
|
|
surface_height(dpy->region.surface));
|
|
return;
|
|
|
|
err:
|
|
vfio_region_exit(&dpy->region.buffer);
|
|
vfio_region_finalize(&dpy->region.buffer);
|
|
}
|
|
|
|
static const GraphicHwOps vfio_display_region_ops = {
|
|
.gfx_update = vfio_display_region_update,
|
|
};
|
|
|
|
static int vfio_display_region_init(VFIOPCIDevice *vdev, Error **errp)
|
|
{
|
|
vdev->dpy = g_new0(VFIODisplay, 1);
|
|
vdev->dpy->con = graphic_console_init(DEVICE(vdev), 0,
|
|
&vfio_display_region_ops,
|
|
vdev);
|
|
if (vdev->enable_ramfb) {
|
|
vdev->dpy->ramfb = ramfb_setup(errp);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void vfio_display_region_exit(VFIODisplay *dpy)
|
|
{
|
|
if (!dpy->region.buffer.size) {
|
|
return;
|
|
}
|
|
|
|
vfio_region_exit(&dpy->region.buffer);
|
|
vfio_region_finalize(&dpy->region.buffer);
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------- */
|
|
|
|
int vfio_display_probe(VFIOPCIDevice *vdev, Error **errp)
|
|
{
|
|
struct vfio_device_gfx_plane_info probe;
|
|
int ret;
|
|
|
|
memset(&probe, 0, sizeof(probe));
|
|
probe.argsz = sizeof(probe);
|
|
probe.flags = VFIO_GFX_PLANE_TYPE_PROBE | VFIO_GFX_PLANE_TYPE_DMABUF;
|
|
ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_QUERY_GFX_PLANE, &probe);
|
|
if (ret == 0) {
|
|
return vfio_display_dmabuf_init(vdev, errp);
|
|
}
|
|
|
|
memset(&probe, 0, sizeof(probe));
|
|
probe.argsz = sizeof(probe);
|
|
probe.flags = VFIO_GFX_PLANE_TYPE_PROBE | VFIO_GFX_PLANE_TYPE_REGION;
|
|
ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_QUERY_GFX_PLANE, &probe);
|
|
if (ret == 0) {
|
|
return vfio_display_region_init(vdev, errp);
|
|
}
|
|
|
|
if (vdev->display == ON_OFF_AUTO_AUTO) {
|
|
/* not an error in automatic mode */
|
|
return 0;
|
|
}
|
|
|
|
error_setg(errp, "vfio: device doesn't support any (known) display method");
|
|
return -1;
|
|
}
|
|
|
|
void vfio_display_finalize(VFIOPCIDevice *vdev)
|
|
{
|
|
if (!vdev->dpy) {
|
|
return;
|
|
}
|
|
|
|
graphic_console_close(vdev->dpy->con);
|
|
vfio_display_dmabuf_exit(vdev->dpy);
|
|
vfio_display_region_exit(vdev->dpy);
|
|
g_free(vdev->dpy);
|
|
}
|