| /* |
| * 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 "hw/display/edid.h" |
| #include "ui/console.h" |
| #include "qapi/error.h" |
| #include "pci.h" |
| #include "trace.h" |
| |
| #ifndef DRM_PLANE_TYPE_PRIMARY |
| # define DRM_PLANE_TYPE_PRIMARY 1 |
| # define DRM_PLANE_TYPE_CURSOR 2 |
| #endif |
| |
| #define pread_field(_fd, _reg, _ptr, _fld) \ |
| (sizeof(_ptr->_fld) != \ |
| pread(_fd, &(_ptr->_fld), sizeof(_ptr->_fld), \ |
| _reg->offset + offsetof(typeof(*_ptr), _fld))) |
| |
| #define pwrite_field(_fd, _reg, _ptr, _fld) \ |
| (sizeof(_ptr->_fld) != \ |
| pwrite(_fd, &(_ptr->_fld), sizeof(_ptr->_fld), \ |
| _reg->offset + offsetof(typeof(*_ptr), _fld))) |
| |
| |
| static void vfio_display_edid_link_up(void *opaque) |
| { |
| VFIOPCIDevice *vdev = opaque; |
| VFIODisplay *dpy = vdev->dpy; |
| int fd = vdev->vbasedev.fd; |
| |
| dpy->edid_regs->link_state = VFIO_DEVICE_GFX_LINK_STATE_UP; |
| if (pwrite_field(fd, dpy->edid_info, dpy->edid_regs, link_state)) { |
| goto err; |
| } |
| trace_vfio_display_edid_link_up(); |
| return; |
| |
| err: |
| trace_vfio_display_edid_write_error(); |
| } |
| |
| static void vfio_display_edid_update(VFIOPCIDevice *vdev, bool enabled, |
| int prefx, int prefy) |
| { |
| VFIODisplay *dpy = vdev->dpy; |
| int fd = vdev->vbasedev.fd; |
| qemu_edid_info edid = { |
| .maxx = dpy->edid_regs->max_xres, |
| .maxy = dpy->edid_regs->max_yres, |
| .prefx = prefx ?: vdev->display_xres, |
| .prefy = prefy ?: vdev->display_yres, |
| }; |
| |
| timer_del(dpy->edid_link_timer); |
| dpy->edid_regs->link_state = VFIO_DEVICE_GFX_LINK_STATE_DOWN; |
| if (pwrite_field(fd, dpy->edid_info, dpy->edid_regs, link_state)) { |
| goto err; |
| } |
| trace_vfio_display_edid_link_down(); |
| |
| if (!enabled) { |
| return; |
| } |
| |
| if (edid.maxx && edid.prefx > edid.maxx) { |
| edid.prefx = edid.maxx; |
| } |
| if (edid.maxy && edid.prefy > edid.maxy) { |
| edid.prefy = edid.maxy; |
| } |
| qemu_edid_generate(dpy->edid_blob, |
| dpy->edid_regs->edid_max_size, |
| &edid); |
| trace_vfio_display_edid_update(edid.prefx, edid.prefy); |
| |
| dpy->edid_regs->edid_size = qemu_edid_size(dpy->edid_blob); |
| if (pwrite_field(fd, dpy->edid_info, dpy->edid_regs, edid_size)) { |
| goto err; |
| } |
| if (pwrite(fd, dpy->edid_blob, dpy->edid_regs->edid_size, |
| dpy->edid_info->offset + dpy->edid_regs->edid_offset) |
| != dpy->edid_regs->edid_size) { |
| goto err; |
| } |
| |
| timer_mod(dpy->edid_link_timer, |
| qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + 100); |
| return; |
| |
| err: |
| trace_vfio_display_edid_write_error(); |
| return; |
| } |
| |
| static int vfio_display_edid_ui_info(void *opaque, uint32_t idx, |
| QemuUIInfo *info) |
| { |
| VFIOPCIDevice *vdev = opaque; |
| VFIODisplay *dpy = vdev->dpy; |
| |
| if (!dpy->edid_regs) { |
| return 0; |
| } |
| |
| if (info->width && info->height) { |
| vfio_display_edid_update(vdev, true, info->width, info->height); |
| } else { |
| vfio_display_edid_update(vdev, false, 0, 0); |
| } |
| |
| return 0; |
| } |
| |
| static void vfio_display_edid_init(VFIOPCIDevice *vdev) |
| { |
| VFIODisplay *dpy = vdev->dpy; |
| int fd = vdev->vbasedev.fd; |
| int ret; |
| |
| ret = vfio_get_dev_region_info(&vdev->vbasedev, |
| VFIO_REGION_TYPE_GFX, |
| VFIO_REGION_SUBTYPE_GFX_EDID, |
| &dpy->edid_info); |
| if (ret) { |
| return; |
| } |
| |
| trace_vfio_display_edid_available(); |
| dpy->edid_regs = g_new0(struct vfio_region_gfx_edid, 1); |
| if (pread_field(fd, dpy->edid_info, dpy->edid_regs, edid_offset)) { |
| goto err; |
| } |
| if (pread_field(fd, dpy->edid_info, dpy->edid_regs, edid_max_size)) { |
| goto err; |
| } |
| if (pread_field(fd, dpy->edid_info, dpy->edid_regs, max_xres)) { |
| goto err; |
| } |
| if (pread_field(fd, dpy->edid_info, dpy->edid_regs, max_yres)) { |
| goto err; |
| } |
| |
| dpy->edid_blob = g_malloc0(dpy->edid_regs->edid_max_size); |
| |
| /* if xres + yres properties are unset use the maximum resolution */ |
| if (!vdev->display_xres) { |
| vdev->display_xres = dpy->edid_regs->max_xres; |
| } |
| if (!vdev->display_yres) { |
| vdev->display_yres = dpy->edid_regs->max_yres; |
| } |
| |
| dpy->edid_link_timer = timer_new_ms(QEMU_CLOCK_REALTIME, |
| vfio_display_edid_link_up, vdev); |
| |
| vfio_display_edid_update(vdev, true, 0, 0); |
| return; |
| |
| err: |
| trace_vfio_display_edid_write_error(); |
| g_free(dpy->edid_regs); |
| dpy->edid_regs = NULL; |
| return; |
| } |
| |
| static void vfio_display_edid_exit(VFIODisplay *dpy) |
| { |
| if (!dpy->edid_regs) { |
| return; |
| } |
| |
| g_free(dpy->edid_regs); |
| g_free(dpy->edid_blob); |
| timer_del(dpy->edid_link_timer); |
| timer_free(dpy->edid_link_timer); |
| } |
| |
| 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.modifier = plane.drm_format_mod; |
| 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, |
| .ui_info = vfio_display_edid_ui_info, |
| }; |
| |
| 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(DEVICE(vdev), errp); |
| } |
| vfio_display_edid_init(vdev); |
| 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(DEVICE(vdev), 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); |
| vfio_display_edid_exit(vdev->dpy); |
| g_free(vdev->dpy); |
| } |
