hw/display/virtio-gpu-base.c - third_party/qemu - Git at Google

 /*
  * 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 "hw/virtio/virtio-gpu.h"
 #include "migration/blocker.h"
 #include "qapi/error.h"
 #include "qemu/error-report.h"
 #include "trace.h"

 void
 virtio_gpu_base_reset(VirtIOGPUBase *g)
 {
     int i;

     g->enable = 0;

     for (i = 0; i < g->conf.max_outputs; i++) {
         g->scanout[i].resource_id = 0;
         g->scanout[i].width = 0;
         g->scanout[i].height = 0;
         g->scanout[i].x = 0;
         g->scanout[i].y = 0;
         g->scanout[i].ds = NULL;
     }
 }

 void
 virtio_gpu_base_fill_display_info(VirtIOGPUBase *g,
                                   struct virtio_gpu_resp_display_info *dpy_info)
 {
     int i;

     for (i = 0; i < g->conf.max_outputs; i++) {
         if (g->enabled_output_bitmask & (1 << i)) {
             dpy_info->pmodes[i].enabled = 1;
             dpy_info->pmodes[i].r.width = cpu_to_le32(g->req_state[i].width);
             dpy_info->pmodes[i].r.height = cpu_to_le32(g->req_state[i].height);
         }
     }
 }

 static void virtio_gpu_invalidate_display(void *opaque)
 {
 }

 static void virtio_gpu_update_display(void *opaque)
 {
 }

 static void virtio_gpu_text_update(void *opaque, console_ch_t *chardata)
 {
 }

 static void virtio_gpu_notify_event(VirtIOGPUBase *g, uint32_t event_type)
 {
     g->virtio_config.events_read |= event_type;
     virtio_notify_config(&g->parent_obj);
 }

 static int virtio_gpu_ui_info(void *opaque, uint32_t idx, QemuUIInfo *info)
 {
     VirtIOGPUBase *g = opaque;

     if (idx >= g->conf.max_outputs) {
         return -1;
     }

     g->req_state[idx].x = info->xoff;
     g->req_state[idx].y = info->yoff;
     g->req_state[idx].width = info->width;
     g->req_state[idx].height = info->height;
     g->req_state[idx].width_mm = info->width_mm;
     g->req_state[idx].height_mm = info->height_mm;

     if (info->width && info->height) {
         g->enabled_output_bitmask |= (1 << idx);
     } else {
         g->enabled_output_bitmask &= ~(1 << idx);
     }

     /* send event to guest */
     virtio_gpu_notify_event(g, VIRTIO_GPU_EVENT_DISPLAY);
     return 0;
 }

 static void
 virtio_gpu_gl_flushed(void *opaque)
 {
     VirtIOGPUBase *g = opaque;
     VirtIOGPUBaseClass *vgc = VIRTIO_GPU_BASE_GET_CLASS(g);

     if (vgc->gl_flushed) {
         vgc->gl_flushed(g);
     }
 }

 static void
 virtio_gpu_gl_block(void *opaque, bool block)
 {
     VirtIOGPUBase *g = opaque;

     if (block) {
         g->renderer_blocked++;
     } else {
         g->renderer_blocked--;
     }
     assert(g->renderer_blocked >= 0);

     if (!block && g->renderer_blocked == 0) {
         virtio_gpu_gl_flushed(g);
     }
 }

 static int
 virtio_gpu_get_flags(void *opaque)
 {
     VirtIOGPUBase *g = opaque;
     int flags = GRAPHIC_FLAGS_NONE;

     if (virtio_gpu_virgl_enabled(g->conf)) {
         flags |= GRAPHIC_FLAGS_GL;
     }

     if (virtio_gpu_dmabuf_enabled(g->conf)) {
         flags |= GRAPHIC_FLAGS_DMABUF;
     }

     return flags;
 }

 static const GraphicHwOps virtio_gpu_ops = {
     .get_flags = virtio_gpu_get_flags,
     .invalidate = virtio_gpu_invalidate_display,
     .gfx_update = virtio_gpu_update_display,
     .text_update = virtio_gpu_text_update,
     .ui_info = virtio_gpu_ui_info,
     .gl_block = virtio_gpu_gl_block,
 };

 bool
 virtio_gpu_base_device_realize(DeviceState *qdev,
                                VirtIOHandleOutput ctrl_cb,
                                VirtIOHandleOutput cursor_cb,
                                Error **errp)
 {
     VirtIODevice *vdev = VIRTIO_DEVICE(qdev);
     VirtIOGPUBase *g = VIRTIO_GPU_BASE(qdev);
     int i;

     if (g->conf.max_outputs > VIRTIO_GPU_MAX_SCANOUTS) {
         error_setg(errp, "invalid max_outputs > %d", VIRTIO_GPU_MAX_SCANOUTS);
         return false;
     }

     if (virtio_gpu_virgl_enabled(g->conf)) {
         error_setg(&g->migration_blocker, "virgl is not yet migratable");
         if (migrate_add_blocker(g->migration_blocker, errp) < 0) {
             error_free(g->migration_blocker);
             return false;
         }
     }

     g->virtio_config.num_scanouts = cpu_to_le32(g->conf.max_outputs);
     virtio_init(VIRTIO_DEVICE(g), "virtio-gpu", VIRTIO_ID_GPU,
                 sizeof(struct virtio_gpu_config));

     if (virtio_gpu_virgl_enabled(g->conf)) {
         /* use larger control queue in 3d mode */
         virtio_add_queue(vdev, 256, ctrl_cb);
         virtio_add_queue(vdev, 16, cursor_cb);
     } else {
         virtio_add_queue(vdev, 64, ctrl_cb);
         virtio_add_queue(vdev, 16, cursor_cb);
     }

     g->enabled_output_bitmask = 1;

     g->req_state[0].width = g->conf.xres;
     g->req_state[0].height = g->conf.yres;

     g->hw_ops = &virtio_gpu_ops;
     for (i = 0; i < g->conf.max_outputs; i++) {
         g->scanout[i].con =
             graphic_console_init(DEVICE(g), i, &virtio_gpu_ops, g);
     }

     return true;
 }

 static uint64_t
 virtio_gpu_base_get_features(VirtIODevice *vdev, uint64_t features,
                              Error **errp)
 {
     VirtIOGPUBase *g = VIRTIO_GPU_BASE(vdev);

     if (virtio_gpu_virgl_enabled(g->conf)) {
         features |= (1 << VIRTIO_GPU_F_VIRGL);
     }
     if (virtio_gpu_edid_enabled(g->conf)) {
         features |= (1 << VIRTIO_GPU_F_EDID);
     }
     if (virtio_gpu_blob_enabled(g->conf)) {
         features |= (1 << VIRTIO_GPU_F_RESOURCE_BLOB);
     }

     return features;
 }

 static void
 virtio_gpu_base_set_features(VirtIODevice *vdev, uint64_t features)
 {
     static const uint32_t virgl = (1 << VIRTIO_GPU_F_VIRGL);

     trace_virtio_gpu_features(((features & virgl) == virgl));
 }

 static void
 virtio_gpu_base_device_unrealize(DeviceState *qdev)
 {
     VirtIOGPUBase *g = VIRTIO_GPU_BASE(qdev);

     if (g->migration_blocker) {
         migrate_del_blocker(g->migration_blocker);
         error_free(g->migration_blocker);
     }
 }

 static void
 virtio_gpu_base_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);

     vdc->unrealize = virtio_gpu_base_device_unrealize;
     vdc->get_features = virtio_gpu_base_get_features;
     vdc->set_features = virtio_gpu_base_set_features;

     set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
     dc->hotpluggable = false;
 }

 static const TypeInfo virtio_gpu_base_info = {
     .name = TYPE_VIRTIO_GPU_BASE,
     .parent = TYPE_VIRTIO_DEVICE,
     .instance_size = sizeof(VirtIOGPUBase),
     .class_size = sizeof(VirtIOGPUBaseClass),
     .class_init = virtio_gpu_base_class_init,
     .abstract = true
 };
 module_obj(TYPE_VIRTIO_GPU_BASE);

 static void
 virtio_register_types(void)
 {
     type_register_static(&virtio_gpu_base_info);
 }

 type_init(virtio_register_types)

 QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_ctrl_hdr)                != 24);
 QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_update_cursor)           != 56);
 QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_resource_unref)          != 32);
 QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_resource_create_2d)      != 40);
 QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_set_scanout)             != 48);
 QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_resource_flush)          != 48);
 QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_transfer_to_host_2d)     != 56);
 QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_mem_entry)               != 16);
 QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_resource_attach_backing) != 32);
 QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_resource_detach_backing) != 32);
 QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_resp_display_info)       != 408);

 QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_transfer_host_3d)        != 72);
 QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_resource_create_3d)      != 72);
 QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_ctx_create)              != 96);
 QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_ctx_destroy)             != 24);
 QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_ctx_resource)            != 32);
 QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_cmd_submit)              != 32);
 QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_get_capset_info)         != 32);
 QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_resp_capset_info)        != 40);
 QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_get_capset)              != 32);
 QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_resp_capset)             != 24);
	/*
	* 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 "hw/virtio/virtio-gpu.h"
	#include "migration/blocker.h"
	#include "qapi/error.h"
	#include "qemu/error-report.h"
	#include "trace.h"

	void
	virtio_gpu_base_reset(VirtIOGPUBase *g)
	{
	int i;

	g->enable = 0;

	for (i = 0; i < g->conf.max_outputs; i++) {
	g->scanout[i].resource_id = 0;
	g->scanout[i].width = 0;
	g->scanout[i].height = 0;
	g->scanout[i].x = 0;
	g->scanout[i].y = 0;
	g->scanout[i].ds = NULL;
	}
	}

	void
	virtio_gpu_base_fill_display_info(VirtIOGPUBase *g,
	struct virtio_gpu_resp_display_info *dpy_info)
	{
	int i;

	for (i = 0; i < g->conf.max_outputs; i++) {
	if (g->enabled_output_bitmask & (1 << i)) {
	dpy_info->pmodes[i].enabled = 1;
	dpy_info->pmodes[i].r.width = cpu_to_le32(g->req_state[i].width);
	dpy_info->pmodes[i].r.height = cpu_to_le32(g->req_state[i].height);
	}
	}
	}

	static void virtio_gpu_invalidate_display(void *opaque)
	{
	}

	static void virtio_gpu_update_display(void *opaque)
	{
	}

	static void virtio_gpu_text_update(void opaque, console_ch_t chardata)
	{
	}

	static void virtio_gpu_notify_event(VirtIOGPUBase *g, uint32_t event_type)
	{
	g->virtio_config.events_read \|= event_type;
	virtio_notify_config(&g->parent_obj);
	}

	static int virtio_gpu_ui_info(void opaque, uint32_t idx, QemuUIInfo info)
	{
	VirtIOGPUBase *g = opaque;

	if (idx >= g->conf.max_outputs) {
	return -1;
	}

	g->req_state[idx].x = info->xoff;
	g->req_state[idx].y = info->yoff;
	g->req_state[idx].width = info->width;
	g->req_state[idx].height = info->height;
	g->req_state[idx].width_mm = info->width_mm;
	g->req_state[idx].height_mm = info->height_mm;

	if (info->width && info->height) {
	g->enabled_output_bitmask \|= (1 << idx);
	} else {
	g->enabled_output_bitmask &= ~(1 << idx);
	}

	/* send event to guest */
	virtio_gpu_notify_event(g, VIRTIO_GPU_EVENT_DISPLAY);
	return 0;
	}

	static void
	virtio_gpu_gl_flushed(void *opaque)
	{
	VirtIOGPUBase *g = opaque;
	VirtIOGPUBaseClass *vgc = VIRTIO_GPU_BASE_GET_CLASS(g);

	if (vgc->gl_flushed) {
	vgc->gl_flushed(g);
	}
	}

	static void
	virtio_gpu_gl_block(void *opaque, bool block)
	{
	VirtIOGPUBase *g = opaque;

	if (block) {
	g->renderer_blocked++;
	} else {
	g->renderer_blocked--;
	}
	assert(g->renderer_blocked >= 0);

	if (!block && g->renderer_blocked == 0) {
	virtio_gpu_gl_flushed(g);
	}
	}

	static int
	virtio_gpu_get_flags(void *opaque)
	{
	VirtIOGPUBase *g = opaque;
	int flags = GRAPHIC_FLAGS_NONE;

	if (virtio_gpu_virgl_enabled(g->conf)) {
	flags \|= GRAPHIC_FLAGS_GL;
	}

	if (virtio_gpu_dmabuf_enabled(g->conf)) {
	flags \|= GRAPHIC_FLAGS_DMABUF;
	}

	return flags;
	}

	static const GraphicHwOps virtio_gpu_ops = {
	.get_flags = virtio_gpu_get_flags,
	.invalidate = virtio_gpu_invalidate_display,
	.gfx_update = virtio_gpu_update_display,
	.text_update = virtio_gpu_text_update,
	.ui_info = virtio_gpu_ui_info,
	.gl_block = virtio_gpu_gl_block,
	};

	bool
	virtio_gpu_base_device_realize(DeviceState *qdev,
	VirtIOHandleOutput ctrl_cb,
	VirtIOHandleOutput cursor_cb,
	Error **errp)
	{
	VirtIODevice *vdev = VIRTIO_DEVICE(qdev);
	VirtIOGPUBase *g = VIRTIO_GPU_BASE(qdev);
	int i;

	if (g->conf.max_outputs > VIRTIO_GPU_MAX_SCANOUTS) {
	error_setg(errp, "invalid max_outputs > %d", VIRTIO_GPU_MAX_SCANOUTS);
	return false;
	}

	if (virtio_gpu_virgl_enabled(g->conf)) {
	error_setg(&g->migration_blocker, "virgl is not yet migratable");
	if (migrate_add_blocker(g->migration_blocker, errp) < 0) {
	error_free(g->migration_blocker);
	return false;
	}
	}

	g->virtio_config.num_scanouts = cpu_to_le32(g->conf.max_outputs);
	virtio_init(VIRTIO_DEVICE(g), "virtio-gpu", VIRTIO_ID_GPU,
	sizeof(struct virtio_gpu_config));

	if (virtio_gpu_virgl_enabled(g->conf)) {
	/* use larger control queue in 3d mode */
	virtio_add_queue(vdev, 256, ctrl_cb);
	virtio_add_queue(vdev, 16, cursor_cb);
	} else {
	virtio_add_queue(vdev, 64, ctrl_cb);
	virtio_add_queue(vdev, 16, cursor_cb);
	}

	g->enabled_output_bitmask = 1;

	g->req_state[0].width = g->conf.xres;
	g->req_state[0].height = g->conf.yres;

	g->hw_ops = &virtio_gpu_ops;
	for (i = 0; i < g->conf.max_outputs; i++) {
	g->scanout[i].con =
	graphic_console_init(DEVICE(g), i, &virtio_gpu_ops, g);
	}

	return true;
	}

	static uint64_t
	virtio_gpu_base_get_features(VirtIODevice *vdev, uint64_t features,
	Error **errp)
	{
	VirtIOGPUBase *g = VIRTIO_GPU_BASE(vdev);

	if (virtio_gpu_virgl_enabled(g->conf)) {
	features \|= (1 << VIRTIO_GPU_F_VIRGL);
	}
	if (virtio_gpu_edid_enabled(g->conf)) {
	features \|= (1 << VIRTIO_GPU_F_EDID);
	}
	if (virtio_gpu_blob_enabled(g->conf)) {
	features \|= (1 << VIRTIO_GPU_F_RESOURCE_BLOB);
	}

	return features;
	}

	static void
	virtio_gpu_base_set_features(VirtIODevice *vdev, uint64_t features)
	{
	static const uint32_t virgl = (1 << VIRTIO_GPU_F_VIRGL);

	trace_virtio_gpu_features(((features & virgl) == virgl));
	}

	static void
	virtio_gpu_base_device_unrealize(DeviceState *qdev)
	{
	VirtIOGPUBase *g = VIRTIO_GPU_BASE(qdev);

	if (g->migration_blocker) {
	migrate_del_blocker(g->migration_blocker);
	error_free(g->migration_blocker);
	}
	}

	static void
	virtio_gpu_base_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);
	VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);

	vdc->unrealize = virtio_gpu_base_device_unrealize;
	vdc->get_features = virtio_gpu_base_get_features;
	vdc->set_features = virtio_gpu_base_set_features;

	set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
	dc->hotpluggable = false;
	}

	static const TypeInfo virtio_gpu_base_info = {
	.name = TYPE_VIRTIO_GPU_BASE,
	.parent = TYPE_VIRTIO_DEVICE,
	.instance_size = sizeof(VirtIOGPUBase),
	.class_size = sizeof(VirtIOGPUBaseClass),
	.class_init = virtio_gpu_base_class_init,
	.abstract = true
	};
	module_obj(TYPE_VIRTIO_GPU_BASE);

	static void
	virtio_register_types(void)
	{
	type_register_static(&virtio_gpu_base_info);
	}

	type_init(virtio_register_types)

	QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_ctrl_hdr) != 24);
	QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_update_cursor) != 56);
	QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_resource_unref) != 32);
	QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_resource_create_2d) != 40);
	QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_set_scanout) != 48);
	QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_resource_flush) != 48);
	QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_transfer_to_host_2d) != 56);
	QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_mem_entry) != 16);
	QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_resource_attach_backing) != 32);
	QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_resource_detach_backing) != 32);
	QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_resp_display_info) != 408);

	QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_transfer_host_3d) != 72);
	QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_resource_create_3d) != 72);
	QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_ctx_create) != 96);
	QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_ctx_destroy) != 24);
	QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_ctx_resource) != 32);
	QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_cmd_submit) != 32);
	QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_get_capset_info) != 32);
	QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_resp_capset_info) != 40);
	QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_get_capset) != 32);
	QEMU_BUILD_BUG_ON(sizeof(struct virtio_gpu_resp_capset) != 24);