LXR qemu/hw/display/virtio-gpu-gl.c

   1/*
   2 * Virtio GPU Device
   3 *
   4 * Copyright Red Hat, Inc. 2013-2014
   5 *
   6 * Authors:
   7 *     Dave Airlie <airlied@redhat.com>
   8 *     Gerd Hoffmann <kraxel@redhat.com>
   9 *
  10 * This work is licensed under the terms of the GNU GPL, version 2 or later.
  11 * See the COPYING file in the top-level directory.
  12 */
  13
  14#include "qemu/osdep.h"
  15#include "qemu/iov.h"
  16#include "qemu/module.h"
  17#include "qemu/error-report.h"
  18#include "qapi/error.h"
  19#include "sysemu/sysemu.h"
  20#include "hw/virtio/virtio.h"
  21#include "hw/virtio/virtio-gpu.h"
  22#include "hw/virtio/virtio-gpu-bswap.h"
  23#include "hw/virtio/virtio-gpu-pixman.h"
  24#include "hw/qdev-properties.h"
  25
  26#include <virglrenderer.h>
  27
  28static void virtio_gpu_gl_update_cursor_data(VirtIOGPU *g,
  29                                             struct virtio_gpu_scanout *s,
  30                                             uint32_t resource_id)
  31{
  32    uint32_t width, height;
  33    uint32_t pixels, *data;
  34
  35    data = virgl_renderer_get_cursor_data(resource_id, &width, &height);
  36    if (!data) {
  37        return;
  38    }
  39
  40    if (width != s->current_cursor->width ||
  41        height != s->current_cursor->height) {
  42        free(data);
  43        return;
  44    }
  45
  46    pixels = s->current_cursor->width * s->current_cursor->height;
  47    memcpy(s->current_cursor->data, data, pixels * sizeof(uint32_t));
  48    free(data);
  49}
  50
  51static void virtio_gpu_gl_flushed(VirtIOGPUBase *b)
  52{
  53    VirtIOGPU *g = VIRTIO_GPU(b);
  54
  55    virtio_gpu_process_cmdq(g);
  56}
  57
  58static void virtio_gpu_gl_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
  59{
  60    VirtIOGPU *g = VIRTIO_GPU(vdev);
  61    VirtIOGPUGL *gl = VIRTIO_GPU_GL(vdev);
  62    struct virtio_gpu_ctrl_command *cmd;
  63
  64    if (!virtio_queue_ready(vq)) {
  65        return;
  66    }
  67
  68    if (!gl->renderer_inited) {
  69        virtio_gpu_virgl_init(g);
  70        gl->renderer_inited = true;
  71    }
  72    if (gl->renderer_reset) {
  73        gl->renderer_reset = false;
  74        virtio_gpu_virgl_reset(g);
  75    }
  76
  77    cmd = virtqueue_pop(vq, sizeof(struct virtio_gpu_ctrl_command));
  78    while (cmd) {
  79        cmd->vq = vq;
  80        cmd->error = 0;
  81        cmd->finished = false;
  82        QTAILQ_INSERT_TAIL(&g->cmdq, cmd, next);
  83        cmd = virtqueue_pop(vq, sizeof(struct virtio_gpu_ctrl_command));
  84    }
  85
  86    virtio_gpu_process_cmdq(g);
  87    virtio_gpu_virgl_fence_poll(g);
  88}
  89
  90static void virtio_gpu_gl_reset(VirtIODevice *vdev)
  91{
  92    VirtIOGPU *g = VIRTIO_GPU(vdev);
  93    VirtIOGPUGL *gl = VIRTIO_GPU_GL(vdev);
  94
  95    virtio_gpu_reset(vdev);
  96
  97    /*
  98     * GL functions must be called with the associated GL context in main
  99     * thread, and when the renderer is unblocked.
 100     */
 101    if (gl->renderer_inited && !gl->renderer_reset) {
 102        virtio_gpu_virgl_reset_scanout(g);
 103        gl->renderer_reset = true;
 104    }
 105}
 106
 107static void virtio_gpu_gl_device_realize(DeviceState *qdev, Error **errp)
 108{
 109    VirtIOGPU *g = VIRTIO_GPU(qdev);
 110
 111#if defined(HOST_WORDS_BIGENDIAN)
 112    error_setg(errp, "virgl is not supported on bigendian platforms");
 113    return;
 114#endif
 115
 116    if (!object_resolve_path_type("", TYPE_VIRTIO_GPU_GL, NULL)) {
 117        error_setg(errp, "at most one %s device is permitted", TYPE_VIRTIO_GPU_GL);
 118        return;
 119    }
 120
 121    if (!display_opengl) {
 122        error_setg(errp, "opengl is not available");
 123        return;
 124    }
 125
 126    g->parent_obj.conf.flags |= (1 << VIRTIO_GPU_FLAG_VIRGL_ENABLED);
 127    VIRTIO_GPU_BASE(g)->virtio_config.num_capsets =
 128        virtio_gpu_virgl_get_num_capsets(g);
 129
 130    virtio_gpu_device_realize(qdev, errp);
 131}
 132
 133static Property virtio_gpu_gl_properties[] = {
 134    DEFINE_PROP_BIT("stats", VirtIOGPU, parent_obj.conf.flags,
 135                    VIRTIO_GPU_FLAG_STATS_ENABLED, false),
 136    DEFINE_PROP_END_OF_LIST(),
 137};
 138
 139static void virtio_gpu_gl_class_init(ObjectClass *klass, void *data)
 140{
 141    DeviceClass *dc = DEVICE_CLASS(klass);
 142    VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
 143    VirtIOGPUBaseClass *vbc = VIRTIO_GPU_BASE_CLASS(klass);
 144    VirtIOGPUClass *vgc = VIRTIO_GPU_CLASS(klass);
 145
 146    vbc->gl_flushed = virtio_gpu_gl_flushed;
 147    vgc->handle_ctrl = virtio_gpu_gl_handle_ctrl;
 148    vgc->process_cmd = virtio_gpu_virgl_process_cmd;
 149    vgc->update_cursor_data = virtio_gpu_gl_update_cursor_data;
 150
 151    vdc->realize = virtio_gpu_gl_device_realize;
 152    vdc->reset = virtio_gpu_gl_reset;
 153    device_class_set_props(dc, virtio_gpu_gl_properties);
 154}
 155
 156static const TypeInfo virtio_gpu_gl_info = {
 157    .name = TYPE_VIRTIO_GPU_GL,
 158    .parent = TYPE_VIRTIO_GPU,
 159    .instance_size = sizeof(VirtIOGPUGL),
 160    .class_init = virtio_gpu_gl_class_init,
 161};
 162module_obj(TYPE_VIRTIO_GPU_GL);
 163
 164static void virtio_register_types(void)
 165{
 166    type_register_static(&virtio_gpu_gl_info);
 167}
 168
 169type_init(virtio_register_types)
 170
 171module_dep("hw-display-virtio-gpu");
 172