542 lines
16 KiB
C
542 lines
16 KiB
C
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/*
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* display support for mdev based vgpu devices
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*
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* Copyright Red Hat, Inc. 2017
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*
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* Authors:
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* Gerd Hoffmann
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include <linux/vfio.h>
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#include <sys/ioctl.h>
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#include "sysemu/sysemu.h"
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#include "hw/display/edid.h"
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#include "ui/console.h"
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#include "qapi/error.h"
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#include "pci.h"
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#include "trace.h"
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#ifndef DRM_PLANE_TYPE_PRIMARY
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# define DRM_PLANE_TYPE_PRIMARY 1
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# define DRM_PLANE_TYPE_CURSOR 2
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#endif
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#define pread_field(_fd, _reg, _ptr, _fld) \
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(sizeof(_ptr->_fld) != \
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pread(_fd, &(_ptr->_fld), sizeof(_ptr->_fld), \
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_reg->offset + offsetof(typeof(*_ptr), _fld)))
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#define pwrite_field(_fd, _reg, _ptr, _fld) \
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(sizeof(_ptr->_fld) != \
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pwrite(_fd, &(_ptr->_fld), sizeof(_ptr->_fld), \
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_reg->offset + offsetof(typeof(*_ptr), _fld)))
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static void vfio_display_edid_link_up(void *opaque)
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{
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VFIOPCIDevice *vdev = opaque;
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VFIODisplay *dpy = vdev->dpy;
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int fd = vdev->vbasedev.fd;
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dpy->edid_regs->link_state = VFIO_DEVICE_GFX_LINK_STATE_UP;
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if (pwrite_field(fd, dpy->edid_info, dpy->edid_regs, link_state)) {
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goto err;
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}
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trace_vfio_display_edid_link_up();
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return;
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err:
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trace_vfio_display_edid_write_error();
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}
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static void vfio_display_edid_update(VFIOPCIDevice *vdev, bool enabled,
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int prefx, int prefy)
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{
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VFIODisplay *dpy = vdev->dpy;
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int fd = vdev->vbasedev.fd;
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qemu_edid_info edid = {
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.maxx = dpy->edid_regs->max_xres,
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.maxy = dpy->edid_regs->max_yres,
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.prefx = prefx ?: vdev->display_xres,
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.prefy = prefy ?: vdev->display_yres,
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};
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timer_del(dpy->edid_link_timer);
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dpy->edid_regs->link_state = VFIO_DEVICE_GFX_LINK_STATE_DOWN;
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if (pwrite_field(fd, dpy->edid_info, dpy->edid_regs, link_state)) {
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goto err;
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}
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trace_vfio_display_edid_link_down();
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if (!enabled) {
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return;
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}
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if (edid.maxx && edid.prefx > edid.maxx) {
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edid.prefx = edid.maxx;
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}
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if (edid.maxy && edid.prefy > edid.maxy) {
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edid.prefy = edid.maxy;
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}
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qemu_edid_generate(dpy->edid_blob,
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dpy->edid_regs->edid_max_size,
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&edid);
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trace_vfio_display_edid_update(edid.prefx, edid.prefy);
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dpy->edid_regs->edid_size = qemu_edid_size(dpy->edid_blob);
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if (pwrite_field(fd, dpy->edid_info, dpy->edid_regs, edid_size)) {
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goto err;
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}
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if (pwrite(fd, dpy->edid_blob, dpy->edid_regs->edid_size,
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dpy->edid_info->offset + dpy->edid_regs->edid_offset)
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!= dpy->edid_regs->edid_size) {
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goto err;
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}
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timer_mod(dpy->edid_link_timer,
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qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + 100);
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return;
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err:
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trace_vfio_display_edid_write_error();
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return;
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}
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static int vfio_display_edid_ui_info(void *opaque, uint32_t idx,
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QemuUIInfo *info)
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{
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VFIOPCIDevice *vdev = opaque;
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VFIODisplay *dpy = vdev->dpy;
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if (!dpy->edid_regs) {
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return 0;
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}
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if (info->width && info->height) {
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vfio_display_edid_update(vdev, true, info->width, info->height);
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} else {
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vfio_display_edid_update(vdev, false, 0, 0);
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}
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return 0;
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}
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static void vfio_display_edid_init(VFIOPCIDevice *vdev)
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{
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VFIODisplay *dpy = vdev->dpy;
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int fd = vdev->vbasedev.fd;
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int ret;
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ret = vfio_get_dev_region_info(&vdev->vbasedev,
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VFIO_REGION_TYPE_GFX,
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VFIO_REGION_SUBTYPE_GFX_EDID,
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&dpy->edid_info);
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if (ret) {
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return;
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}
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trace_vfio_display_edid_available();
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dpy->edid_regs = g_new0(struct vfio_region_gfx_edid, 1);
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if (pread_field(fd, dpy->edid_info, dpy->edid_regs, edid_offset)) {
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goto err;
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}
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if (pread_field(fd, dpy->edid_info, dpy->edid_regs, edid_max_size)) {
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goto err;
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}
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if (pread_field(fd, dpy->edid_info, dpy->edid_regs, max_xres)) {
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goto err;
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}
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if (pread_field(fd, dpy->edid_info, dpy->edid_regs, max_yres)) {
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goto err;
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}
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dpy->edid_blob = g_malloc0(dpy->edid_regs->edid_max_size);
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/* if xres + yres properties are unset use the maximum resolution */
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if (!vdev->display_xres) {
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vdev->display_xres = dpy->edid_regs->max_xres;
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}
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if (!vdev->display_yres) {
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vdev->display_yres = dpy->edid_regs->max_yres;
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}
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dpy->edid_link_timer = timer_new_ms(QEMU_CLOCK_REALTIME,
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vfio_display_edid_link_up, vdev);
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vfio_display_edid_update(vdev, true, 0, 0);
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return;
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err:
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trace_vfio_display_edid_write_error();
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g_free(dpy->edid_regs);
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dpy->edid_regs = NULL;
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return;
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}
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static void vfio_display_edid_exit(VFIODisplay *dpy)
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{
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if (!dpy->edid_regs) {
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return;
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}
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g_free(dpy->edid_regs);
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g_free(dpy->edid_blob);
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timer_del(dpy->edid_link_timer);
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timer_free(dpy->edid_link_timer);
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}
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static void vfio_display_update_cursor(VFIODMABuf *dmabuf,
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struct vfio_device_gfx_plane_info *plane)
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{
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if (dmabuf->pos_x != plane->x_pos || dmabuf->pos_y != plane->y_pos) {
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dmabuf->pos_x = plane->x_pos;
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dmabuf->pos_y = plane->y_pos;
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dmabuf->pos_updates++;
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}
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if (dmabuf->hot_x != plane->x_hot || dmabuf->hot_y != plane->y_hot) {
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dmabuf->hot_x = plane->x_hot;
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dmabuf->hot_y = plane->y_hot;
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dmabuf->hot_updates++;
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}
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}
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static VFIODMABuf *vfio_display_get_dmabuf(VFIOPCIDevice *vdev,
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uint32_t plane_type)
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{
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VFIODisplay *dpy = vdev->dpy;
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struct vfio_device_gfx_plane_info plane;
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VFIODMABuf *dmabuf;
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int fd, ret;
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memset(&plane, 0, sizeof(plane));
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plane.argsz = sizeof(plane);
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plane.flags = VFIO_GFX_PLANE_TYPE_DMABUF;
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plane.drm_plane_type = plane_type;
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ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_QUERY_GFX_PLANE, &plane);
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if (ret < 0) {
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return NULL;
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}
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if (!plane.drm_format || !plane.size) {
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return NULL;
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}
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QTAILQ_FOREACH(dmabuf, &dpy->dmabuf.bufs, next) {
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if (dmabuf->dmabuf_id == plane.dmabuf_id) {
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/* found in list, move to head, return it */
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QTAILQ_REMOVE(&dpy->dmabuf.bufs, dmabuf, next);
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QTAILQ_INSERT_HEAD(&dpy->dmabuf.bufs, dmabuf, next);
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if (plane_type == DRM_PLANE_TYPE_CURSOR) {
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vfio_display_update_cursor(dmabuf, &plane);
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}
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return dmabuf;
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}
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}
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fd = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_GFX_DMABUF, &plane.dmabuf_id);
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if (fd < 0) {
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return NULL;
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}
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dmabuf = g_new0(VFIODMABuf, 1);
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dmabuf->dmabuf_id = plane.dmabuf_id;
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dmabuf->buf.width = plane.width;
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dmabuf->buf.height = plane.height;
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dmabuf->buf.stride = plane.stride;
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dmabuf->buf.fourcc = plane.drm_format;
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dmabuf->buf.modifier = plane.drm_format_mod;
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dmabuf->buf.fd = fd;
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if (plane_type == DRM_PLANE_TYPE_CURSOR) {
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vfio_display_update_cursor(dmabuf, &plane);
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}
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QTAILQ_INSERT_HEAD(&dpy->dmabuf.bufs, dmabuf, next);
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return dmabuf;
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}
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static void vfio_display_free_one_dmabuf(VFIODisplay *dpy, VFIODMABuf *dmabuf)
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{
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QTAILQ_REMOVE(&dpy->dmabuf.bufs, dmabuf, next);
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dpy_gl_release_dmabuf(dpy->con, &dmabuf->buf);
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close(dmabuf->buf.fd);
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g_free(dmabuf);
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}
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static void vfio_display_free_dmabufs(VFIOPCIDevice *vdev)
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{
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VFIODisplay *dpy = vdev->dpy;
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VFIODMABuf *dmabuf, *tmp;
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uint32_t keep = 5;
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QTAILQ_FOREACH_SAFE(dmabuf, &dpy->dmabuf.bufs, next, tmp) {
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if (keep > 0) {
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keep--;
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continue;
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}
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assert(dmabuf != dpy->dmabuf.primary);
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vfio_display_free_one_dmabuf(dpy, dmabuf);
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}
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}
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static void vfio_display_dmabuf_update(void *opaque)
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{
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VFIOPCIDevice *vdev = opaque;
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VFIODisplay *dpy = vdev->dpy;
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VFIODMABuf *primary, *cursor;
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bool free_bufs = false, new_cursor = false;
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primary = vfio_display_get_dmabuf(vdev, DRM_PLANE_TYPE_PRIMARY);
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if (primary == NULL) {
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if (dpy->ramfb) {
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ramfb_display_update(dpy->con, dpy->ramfb);
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}
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return;
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}
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if (dpy->dmabuf.primary != primary) {
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dpy->dmabuf.primary = primary;
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qemu_console_resize(dpy->con,
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primary->buf.width, primary->buf.height);
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dpy_gl_scanout_dmabuf(dpy->con, &primary->buf);
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free_bufs = true;
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}
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cursor = vfio_display_get_dmabuf(vdev, DRM_PLANE_TYPE_CURSOR);
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if (dpy->dmabuf.cursor != cursor) {
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dpy->dmabuf.cursor = cursor;
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new_cursor = true;
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free_bufs = true;
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}
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if (cursor && (new_cursor || cursor->hot_updates)) {
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bool have_hot = (cursor->hot_x != 0xffffffff &&
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cursor->hot_y != 0xffffffff);
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dpy_gl_cursor_dmabuf(dpy->con, &cursor->buf, have_hot,
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cursor->hot_x, cursor->hot_y);
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cursor->hot_updates = 0;
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} else if (!cursor && new_cursor) {
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dpy_gl_cursor_dmabuf(dpy->con, NULL, false, 0, 0);
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}
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if (cursor && cursor->pos_updates) {
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dpy_gl_cursor_position(dpy->con,
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cursor->pos_x,
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cursor->pos_y);
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cursor->pos_updates = 0;
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}
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dpy_gl_update(dpy->con, 0, 0, primary->buf.width, primary->buf.height);
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if (free_bufs) {
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vfio_display_free_dmabufs(vdev);
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}
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}
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static const GraphicHwOps vfio_display_dmabuf_ops = {
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.gfx_update = vfio_display_dmabuf_update,
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.ui_info = vfio_display_edid_ui_info,
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};
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static int vfio_display_dmabuf_init(VFIOPCIDevice *vdev, Error **errp)
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{
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if (!display_opengl) {
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error_setg(errp, "vfio-display-dmabuf: opengl not available");
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|
|
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);
|
||
|
|
}
|
||
|
|
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);
|
||
|
|
dpy->region.surface = NULL;
|
||
|
|
}
|
||
|
|
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);
|
||
|
|
vfio_display_edid_exit(vdev->dpy);
|
||
|
|
g_free(vdev->dpy);
|
||
|
|
}
|