diff options
Diffstat (limited to 'hw/vfio/display.c')
| -rw-r--r-- | hw/vfio/display.c | 347 |
1 files changed, 347 insertions, 0 deletions
diff --git a/hw/vfio/display.c b/hw/vfio/display.c new file mode 100644 index 0000000..7d727ce --- /dev/null +++ b/hw/vfio/display.c @@ -0,0 +1,347 @@ +/* + * 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) { + 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); + 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); + } +} + +/* ---------------------------------------------------------------------- */ + +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) { + 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); + 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); +} |