qemu

virtio-gpu-gl.c (4709B)

---

 /*
  * Virtio GPU Device
  *
  * Copyright Red Hat, Inc. 2013-2014
  *
  * Authors:
  *     Dave Airlie <airlied@redhat.com>
  *     Gerd Hoffmann <kraxel@redhat.com>
  *
  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  * See the COPYING file in the top-level directory.
  */
 
 #include "qemu/osdep.h"
 #include "qemu/iov.h"
 #include "qemu/module.h"
 #include "qemu/error-report.h"
 #include "qapi/error.h"
 #include "sysemu/sysemu.h"
 #include "hw/virtio/virtio.h"
 #include "hw/virtio/virtio-gpu.h"
 #include "hw/virtio/virtio-gpu-bswap.h"
 #include "hw/virtio/virtio-gpu-pixman.h"
 #include "hw/qdev-properties.h"
 
 #include <virglrenderer.h>
 
 static void virtio_gpu_gl_update_cursor_data(VirtIOGPU *g,
                                              struct virtio_gpu_scanout *s,
                                              uint32_t resource_id)
 {
     uint32_t width, height;
     uint32_t pixels, *data;
 
     data = virgl_renderer_get_cursor_data(resource_id, &width, &height);
     if (!data) {
         return;
     }
 
     if (width != s->current_cursor->width ||
         height != s->current_cursor->height) {
         free(data);
         return;
     }
 
     pixels = s->current_cursor->width * s->current_cursor->height;
     memcpy(s->current_cursor->data, data, pixels * sizeof(uint32_t));
     free(data);
 }
 
 static void virtio_gpu_gl_flushed(VirtIOGPUBase *b)
 {
     VirtIOGPU *g = VIRTIO_GPU(b);
 
     virtio_gpu_process_cmdq(g);
 }
 
 static void virtio_gpu_gl_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
 {
     VirtIOGPU *g = VIRTIO_GPU(vdev);
     VirtIOGPUGL *gl = VIRTIO_GPU_GL(vdev);
     struct virtio_gpu_ctrl_command *cmd;
 
     if (!virtio_queue_ready(vq)) {
         return;
     }
 
     if (!gl->renderer_inited) {
         virtio_gpu_virgl_init(g);
         gl->renderer_inited = true;
     }
     if (gl->renderer_reset) {
         gl->renderer_reset = false;
         virtio_gpu_virgl_reset(g);
     }
 
     cmd = virtqueue_pop(vq, sizeof(struct virtio_gpu_ctrl_command));
     while (cmd) {
         cmd->vq = vq;
         cmd->error = 0;
         cmd->finished = false;
         QTAILQ_INSERT_TAIL(&g->cmdq, cmd, next);
         cmd = virtqueue_pop(vq, sizeof(struct virtio_gpu_ctrl_command));
     }
 
     virtio_gpu_process_cmdq(g);
     virtio_gpu_virgl_fence_poll(g);
 }
 
 static void virtio_gpu_gl_reset(VirtIODevice *vdev)
 {
     VirtIOGPU *g = VIRTIO_GPU(vdev);
     VirtIOGPUGL *gl = VIRTIO_GPU_GL(vdev);
 
     virtio_gpu_reset(vdev);
 
     /*
      * GL functions must be called with the associated GL context in main
      * thread, and when the renderer is unblocked.
      */
     if (gl->renderer_inited && !gl->renderer_reset) {
         virtio_gpu_virgl_reset_scanout(g);
         gl->renderer_reset = true;
     }
 }
 
 static void virtio_gpu_gl_device_realize(DeviceState *qdev, Error **errp)
 {
     VirtIOGPU *g = VIRTIO_GPU(qdev);
 
 #if HOST_BIG_ENDIAN
     error_setg(errp, "virgl is not supported on bigendian platforms");
     return;
 #endif
 
     if (!object_resolve_path_type("", TYPE_VIRTIO_GPU_GL, NULL)) {
         error_setg(errp, "at most one %s device is permitted", TYPE_VIRTIO_GPU_GL);
         return;
     }
 
     if (!display_opengl) {
         error_setg(errp, "opengl is not available");
         return;
     }
 
     g->parent_obj.conf.flags |= (1 << VIRTIO_GPU_FLAG_VIRGL_ENABLED);
     VIRTIO_GPU_BASE(g)->virtio_config.num_capsets =
         virtio_gpu_virgl_get_num_capsets(g);
 
     virtio_gpu_device_realize(qdev, errp);
 }
 
 static Property virtio_gpu_gl_properties[] = {
     DEFINE_PROP_BIT("stats", VirtIOGPU, parent_obj.conf.flags,
                     VIRTIO_GPU_FLAG_STATS_ENABLED, false),
     DEFINE_PROP_END_OF_LIST(),
 };
 
 static void virtio_gpu_gl_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
     VirtIOGPUBaseClass *vbc = VIRTIO_GPU_BASE_CLASS(klass);
     VirtIOGPUClass *vgc = VIRTIO_GPU_CLASS(klass);
 
     vbc->gl_flushed = virtio_gpu_gl_flushed;
     vgc->handle_ctrl = virtio_gpu_gl_handle_ctrl;
     vgc->process_cmd = virtio_gpu_virgl_process_cmd;
     vgc->update_cursor_data = virtio_gpu_gl_update_cursor_data;
 
     vdc->realize = virtio_gpu_gl_device_realize;
     vdc->reset = virtio_gpu_gl_reset;
     device_class_set_props(dc, virtio_gpu_gl_properties);
 }
 
 static const TypeInfo virtio_gpu_gl_info = {
     .name = TYPE_VIRTIO_GPU_GL,
     .parent = TYPE_VIRTIO_GPU,
     .instance_size = sizeof(VirtIOGPUGL),
     .class_init = virtio_gpu_gl_class_init,
 };
 module_obj(TYPE_VIRTIO_GPU_GL);
 module_kconfig(VIRTIO_GPU);
 
 static void virtio_register_types(void)
 {
     type_register_static(&virtio_gpu_gl_info);
 }
 
 type_init(virtio_register_types)
 
 module_dep("hw-display-virtio-gpu");