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
  28 static 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
  51 static void virtio_gpu_gl_flushed(VirtIOGPUBase *b)
  52 {
  53     VirtIOGPU *g = VIRTIO_GPU(b);
  54
  55     virtio_gpu_process_cmdq(g);
  56 }
  57
  58 static 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
  90 static 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
 107 static void virtio_gpu_gl_device_realize(DeviceState *qdev, Error **errp)
 108 {
 109     ERRP_GUARD();
 110     VirtIOGPU *g = VIRTIO_GPU(qdev);
 111
 112 #if HOST_BIG_ENDIAN
 113     error_setg(errp, "virgl is not supported on bigendian platforms");
 114     return;
 115 #endif
 116
 117     if (!object_resolve_path_type("", TYPE_VIRTIO_GPU_GL, NULL)) {
 118         error_setg(errp, "at most one %s device is permitted", TYPE_VIRTIO_GPU_GL);
 119         return;
 120     }
 121
 122     if (!display_opengl) {
 123         error_setg(errp,
 124                    "The display backend does not have OpenGL support enabled");
 125         error_append_hint(errp,
 126                           "It can be enabled with '-display BACKEND,gl=on' "
 127                           "where BACKEND is the name of the display backend "
 128                           "to use.\n");
 129         return;
 130     }
 131
 132     g->parent_obj.conf.flags |= (1 << VIRTIO_GPU_FLAG_VIRGL_ENABLED);
 133     VIRTIO_GPU_BASE(g)->virtio_config.num_capsets =
 134         virtio_gpu_virgl_get_num_capsets(g);
 135
 136     virtio_gpu_device_realize(qdev, errp);
 137 }
 138
 139 static Property virtio_gpu_gl_properties[] = {
 140     DEFINE_PROP_BIT("stats", VirtIOGPU, parent_obj.conf.flags,
 141                     VIRTIO_GPU_FLAG_STATS_ENABLED, false),
 142     DEFINE_PROP_END_OF_LIST(),
 143 };
 144
 145 static void virtio_gpu_gl_class_init(ObjectClass *klass, void *data)
 146 {
 147     DeviceClass *dc = DEVICE_CLASS(klass);
 148     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
 149     VirtIOGPUBaseClass *vbc = VIRTIO_GPU_BASE_CLASS(klass);
 150     VirtIOGPUClass *vgc = VIRTIO_GPU_CLASS(klass);
 151
 152     vbc->gl_flushed = virtio_gpu_gl_flushed;
 153     vgc->handle_ctrl = virtio_gpu_gl_handle_ctrl;
 154     vgc->process_cmd = virtio_gpu_virgl_process_cmd;
 155     vgc->update_cursor_data = virtio_gpu_gl_update_cursor_data;
 156
 157     vdc->realize = virtio_gpu_gl_device_realize;
 158     vdc->reset = virtio_gpu_gl_reset;
 159     device_class_set_props(dc, virtio_gpu_gl_properties);
 160 }
 161
 162 static const TypeInfo virtio_gpu_gl_info = {
 163     .name = TYPE_VIRTIO_GPU_GL,
 164     .parent = TYPE_VIRTIO_GPU,
 165     .instance_size = sizeof(VirtIOGPUGL),
 166     .class_init = virtio_gpu_gl_class_init,
 167 };
 168 module_obj(TYPE_VIRTIO_GPU_GL);
 169 module_kconfig(VIRTIO_GPU);
 170
 171 static void virtio_register_types(void)
 172 {
 173     type_register_static(&virtio_gpu_gl_info);
 174 }
 175
 176 type_init(virtio_register_types)
 177
 178 module_dep("hw-display-virtio-gpu");
 179 module_dep("ui-opengl");