C++ VOID2U64函数代码示例

static void flush(struct etna_cmd_stream *stream)
{
	struct etna_cmd_stream_priv *priv = etna_cmd_stream_priv(stream);
	int ret, id = priv->pipe->id;
	struct etna_gpu *gpu = priv->pipe->gpu;
	struct drm_etnaviv_gem_submit req;

	req.pipe = gpu->core;
	req.exec_state = id;
	req.bos = VOID2U64(priv->submit.bos);
	req.nr_bos = priv->submit.nr_bos;
	req.relocs = VOID2U64(priv->submit.relocs);
	req.nr_relocs = priv->submit.nr_relocs;
	req.stream = VOID2U64(stream->buffer);
	req.stream_size = stream->offset * 4; /* in bytes */

	ret = drmCommandWriteRead(gpu->dev->fd, DRM_ETNAVIV_GEM_SUBMIT,
			&req, sizeof(req));

	if (ret) {
		ERROR_MSG("submit failed: %d (%s)", ret, strerror(errno));
	} else {
		priv->last_timestamp = req.fence;
	}

	for (uint32_t i = 0; i < priv->nr_bos; i++) {
		struct etna_bo *bo = priv->bos[i];
		bo->current_stream = NULL;
		etna_bo_del(bo);
	}
}

drmModeObjectPropertiesPtr drmModeObjectGetProperties(int fd,
						      uint32_t object_id,
						      uint32_t object_type)
{
	struct drm_mode_obj_get_properties properties;
	drmModeObjectPropertiesPtr ret = NULL;
	uint32_t count;

retry:
	memset(&properties, 0, sizeof(struct drm_mode_obj_get_properties));
	properties.obj_id = object_id;
	properties.obj_type = object_type;

	if (drmIoctl(fd, DRM_IOCTL_MODE_OBJ_GETPROPERTIES, &properties))
		return 0;

	count = properties.count_props;

	if (count) {
		properties.props_ptr = VOID2U64(drmMalloc(count *
							  sizeof(uint32_t)));
		if (!properties.props_ptr)
			goto err_allocs;
		properties.prop_values_ptr = VOID2U64(drmMalloc(count *
						      sizeof(uint64_t)));
		if (!properties.prop_values_ptr)
			goto err_allocs;
	}

	if (drmIoctl(fd, DRM_IOCTL_MODE_OBJ_GETPROPERTIES, &properties))
		goto err_allocs;

	if (count < properties.count_props) {
		drmFree(U642VOID(properties.props_ptr));
		drmFree(U642VOID(properties.prop_values_ptr));
		goto retry;
	}
	count = properties.count_props;

	ret = drmMalloc(sizeof(*ret));
	if (!ret)
		goto err_allocs;

	ret->count_props = count;
	ret->props = drmAllocCpy(U642VOID(properties.props_ptr),
				 count, sizeof(uint32_t));
	ret->prop_values = drmAllocCpy(U642VOID(properties.prop_values_ptr),
				       count, sizeof(uint64_t));
	if (ret->count_props && (!ret->props || !ret->prop_values)) {
		drmFree(ret->props);
		drmFree(ret->prop_values);
		drmFree(ret);
		ret = NULL;
	}

err_allocs:
	drmFree(U642VOID(properties.props_ptr));
	drmFree(U642VOID(properties.prop_values_ptr));
	return ret;
}

static void flush(struct etna_cmd_stream *stream, int in_fence_fd,
		  int *out_fence_fd)
{
	struct etna_cmd_stream_priv *priv = etna_cmd_stream_priv(stream);
	int ret, id = priv->pipe->id;
	struct etna_gpu *gpu = priv->pipe->gpu;

	struct drm_etnaviv_gem_submit req = {
		.pipe = gpu->core,
		.exec_state = id,
		.bos = VOID2U64(priv->submit.bos),
		.nr_bos = priv->submit.nr_bos,
		.relocs = VOID2U64(priv->submit.relocs),
		.nr_relocs = priv->submit.nr_relocs,
		.stream = VOID2U64(stream->buffer),
		.stream_size = stream->offset * 4, /* in bytes */
	};

	if (in_fence_fd != -1) {
		req.flags |= ETNA_SUBMIT_FENCE_FD_IN | ETNA_SUBMIT_NO_IMPLICIT;
		req.fence_fd = in_fence_fd;
	}

	if (out_fence_fd)
		req.flags |= ETNA_SUBMIT_FENCE_FD_OUT;

	/*
	 * Pass the complete submit structure only if flags are set. Otherwise,
	 * only pass the fields up to, but not including the flags field for
	 * backwards compatiblity with older kernels.
	 */
	ret = drmCommandWriteRead(gpu->dev->fd, DRM_ETNAVIV_GEM_SUBMIT,
			&req, req.flags ? sizeof(req) :
			offsetof(struct drm_etnaviv_gem_submit, flags));

	if (ret)
		ERROR_MSG("submit failed: %d (%s)", ret, strerror(errno));
	else
		priv->last_timestamp = req.fence;

	for (uint32_t i = 0; i < priv->nr_bos; i++) {
		struct etna_bo *bo = priv->bos[i];

		bo->current_stream = NULL;
		etna_bo_del(bo);
	}

	if (out_fence_fd)
		*out_fence_fd = req.fence_fd;
}

void etna_cmd_stream_flush(struct etna_cmd_stream *stream)
{
	flush(stream, -1, NULL);
	reset_buffer(stream);
}

drmModeResPtr drmModeGetResources(int fd)
{
	struct drm_mode_card_res res;
	drmModeResPtr r = 0;

	memset(&res, 0, sizeof(struct drm_mode_card_res));

	if (drmIoctl(fd, DRM_IOCTL_MODE_GETRESOURCES, &res))
		return 0;

	if (res.count_fbs)
		res.fb_id_ptr = VOID2U64(drmMalloc(res.count_fbs*sizeof(uint32_t)));
	if (res.count_crtcs)
		res.crtc_id_ptr = VOID2U64(drmMalloc(res.count_crtcs*sizeof(uint32_t)));
	if (res.count_connectors)
		res.connector_id_ptr = VOID2U64(drmMalloc(res.count_connectors*sizeof(uint32_t)));
	if (res.count_encoders)
		res.encoder_id_ptr = VOID2U64(drmMalloc(res.count_encoders*sizeof(uint32_t)));

	if (drmIoctl(fd, DRM_IOCTL_MODE_GETRESOURCES, &res)) {
		r = NULL;
		goto err_allocs;
	}

	/*
	 * return
	 */


	if (!(r = drmMalloc(sizeof(*r))))
		return 0;

	r->min_width     = res.min_width;
	r->max_width     = res.max_width;
	r->min_height    = res.min_height;
	r->max_height    = res.max_height;
	r->count_fbs     = res.count_fbs;
	r->count_crtcs   = res.count_crtcs;
	r->count_connectors = res.count_connectors;
	r->count_encoders = res.count_encoders;
	/* TODO we realy should test if these allocs fails. */
	r->fbs           = drmAllocCpy(U642VOID(res.fb_id_ptr), res.count_fbs, sizeof(uint32_t));
	r->crtcs         = drmAllocCpy(U642VOID(res.crtc_id_ptr), res.count_crtcs, sizeof(uint32_t));
	r->connectors       = drmAllocCpy(U642VOID(res.connector_id_ptr), res.count_connectors, sizeof(uint32_t));
	r->encoders      = drmAllocCpy(U642VOID(res.encoder_id_ptr), res.count_encoders, sizeof(uint32_t));

err_allocs:
	drmFree(U642VOID(res.fb_id_ptr));
	drmFree(U642VOID(res.crtc_id_ptr));
	drmFree(U642VOID(res.connector_id_ptr));
	drmFree(U642VOID(res.encoder_id_ptr));

	return r;
}

int drmModeCrtcSetGamma(int fd, uint32_t crtc_id, uint32_t size,
			uint16_t *red, uint16_t *green, uint16_t *blue)
{
	struct drm_mode_crtc_lut l;

	l.crtc_id = crtc_id;
	l.gamma_size = size;
	l.red = VOID2U64(red);
	l.green = VOID2U64(green);
	l.blue = VOID2U64(blue);

	return DRM_IOCTL(fd, DRM_IOCTL_MODE_SETGAMMA, &l);
}

drmModePropertyBlobPtr drmModeGetPropertyBlob(int fd, uint32_t blob_id)
{
	struct drm_mode_get_blob blob;
	drmModePropertyBlobPtr r;

	blob.length = 0;
	blob.data = 0;
	blob.blob_id = blob_id;

	if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPBLOB, &blob))
		return NULL;

	if (blob.length)
		blob.data = VOID2U64(drmMalloc(blob.length));

	if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPBLOB, &blob)) {
		r = NULL;
		goto err_allocs;
	}

	if (!(r = drmMalloc(sizeof(*r))))
		goto err_allocs;

	r->id = blob.blob_id;
	r->length = blob.length;
	r->data = drmAllocCpy(U642VOID(blob.data), 1, blob.length);

err_allocs:
	drmFree(U642VOID(blob.data));
	return r;
}

int drmModeCrtcGetGamma(int fd, uint32_t crtc_id, uint32_t size,
			uint16_t *red, uint16_t *green, uint16_t *blue)
{
	int ret;
	struct drm_mode_crtc_lut l;

	l.crtc_id = crtc_id;
	l.gamma_size = size;
	l.red = VOID2U64(red);
	l.green = VOID2U64(green);
	l.blue = VOID2U64(blue);

	if ((ret = drmIoctl(fd, DRM_IOCTL_MODE_GETGAMMA, &l)))
		return ret;

	return 0;
}

static int drm_atomic_commit(uint32_t fb_id, uint32_t flags)
{
	drmModeAtomicReq *req;
	uint32_t plane_id = drm.plane->plane->plane_id;
	uint32_t blob_id;
	int ret;

	req = drmModeAtomicAlloc();

	if (flags & DRM_MODE_ATOMIC_ALLOW_MODESET) {
		if (add_connector_property(req, drm.connector_id, "CRTC_ID",
						drm.crtc_id) < 0)
			return -1;

		if (drmModeCreatePropertyBlob(drm.fd, drm.mode, sizeof(*drm.mode),
					      &blob_id) != 0)
			return -1;

		if (add_crtc_property(req, drm.crtc_id, "MODE_ID", blob_id) < 0)
			return -1;

		if (add_crtc_property(req, drm.crtc_id, "ACTIVE", 1) < 0)
			return -1;
	}

	add_plane_property(req, plane_id, "FB_ID", fb_id);
	add_plane_property(req, plane_id, "CRTC_ID", drm.crtc_id);
	add_plane_property(req, plane_id, "SRC_X", 0);
	add_plane_property(req, plane_id, "SRC_Y", 0);
	add_plane_property(req, plane_id, "SRC_W", drm.mode->hdisplay << 16);
	add_plane_property(req, plane_id, "SRC_H", drm.mode->vdisplay << 16);
	add_plane_property(req, plane_id, "CRTC_X", 0);
	add_plane_property(req, plane_id, "CRTC_Y", 0);
	add_plane_property(req, plane_id, "CRTC_W", drm.mode->hdisplay);
	add_plane_property(req, plane_id, "CRTC_H", drm.mode->vdisplay);

	if (drm.kms_in_fence_fd != -1) {
		add_crtc_property(req, drm.crtc_id, "OUT_FENCE_PTR",
				VOID2U64(&drm.kms_out_fence_fd));
		add_plane_property(req, plane_id, "IN_FENCE_FD", drm.kms_in_fence_fd);
	}

	ret = drmModeAtomicCommit(drm.fd, req, flags, NULL);
	if (ret)
		goto out;

	if (drm.kms_in_fence_fd != -1) {
		close(drm.kms_in_fence_fd);
		drm.kms_in_fence_fd = -1;
	}

out:
	drmModeAtomicFree(req);

	return ret;
}

int drmModeDirtyFB(int fd, uint32_t bufferId,
		   drmModeClipPtr clips, uint32_t num_clips)
{
	struct drm_mode_fb_dirty_cmd dirty = { 0 };

	dirty.fb_id = bufferId;
	dirty.clips_ptr = VOID2U64(clips);
	dirty.num_clips = num_clips;

	return DRM_IOCTL(fd, DRM_IOCTL_MODE_DIRTYFB, &dirty);
}

int drmModePageFlip(int fd, uint32_t crtc_id, uint32_t fb_id,
		    uint32_t flags, void *user_data)
{
	struct drm_mode_crtc_page_flip flip;

	flip.fb_id = fb_id;
	flip.crtc_id = crtc_id;
	flip.user_data = VOID2U64(user_data);
	flip.flags = flags;
	flip.reserved = 0;

	return DRM_IOCTL(fd, DRM_IOCTL_MODE_PAGE_FLIP, &flip);
}

drmModePlanePtr drmModeGetPlane(int fd, uint32_t plane_id)
{
	struct drm_mode_get_plane ovr, counts;
	drmModePlanePtr r = 0;

retry:
	memset(&ovr, 0, sizeof(struct drm_mode_get_plane));
	ovr.plane_id = plane_id;
	if (drmIoctl(fd, DRM_IOCTL_MODE_GETPLANE, &ovr))
		return 0;

	counts = ovr;

	if (ovr.count_format_types) {
		ovr.format_type_ptr = VOID2U64(drmMalloc(ovr.count_format_types *
							 sizeof(uint32_t)));
		if (!ovr.format_type_ptr)
			goto err_allocs;
	}

	if (drmIoctl(fd, DRM_IOCTL_MODE_GETPLANE, &ovr))
		goto err_allocs;

	if (counts.count_format_types < ovr.count_format_types) {
		drmFree(U642VOID(ovr.format_type_ptr));
		goto retry;
	}

	if (!(r = drmMalloc(sizeof(*r))))
		goto err_allocs;

	r->count_formats = ovr.count_format_types;
	r->plane_id = ovr.plane_id;
	r->crtc_id = ovr.crtc_id;
	r->fb_id = ovr.fb_id;
	r->possible_crtcs = ovr.possible_crtcs;
	r->gamma_size = ovr.gamma_size;
	r->formats = drmAllocCpy(U642VOID(ovr.format_type_ptr),
				 ovr.count_format_types, sizeof(uint32_t));
	if (ovr.count_format_types && !r->formats) {
		drmFree(r->formats);
		drmFree(r);
		r = 0;
	}

err_allocs:
	drmFree(U642VOID(ovr.format_type_ptr));

	return r;
}

drm_public int drmModePageFlipTarget(int fd, uint32_t crtc_id, uint32_t fb_id,
			  uint32_t flags, void *user_data,
			  uint32_t target_vblank)
{
	struct drm_mode_crtc_page_flip_target flip_target;

	memclear(flip_target);
	flip_target.fb_id = fb_id;
	flip_target.crtc_id = crtc_id;
	flip_target.user_data = VOID2U64(user_data);
	flip_target.flags = flags;
	flip_target.sequence = target_vblank;

	return DRM_IOCTL(fd, DRM_IOCTL_MODE_PAGE_FLIP, &flip_target);
}

drmModePlaneResPtr drmModeGetPlaneResources(int fd)
{
	struct drm_mode_get_plane_res res, counts;
	drmModePlaneResPtr r = 0;

retry:
	memset(&res, 0, sizeof(struct drm_mode_get_plane_res));
	if (drmIoctl(fd, DRM_IOCTL_MODE_GETPLANERESOURCES, &res))
		return 0;

	counts = res;

	if (res.count_planes) {
		res.plane_id_ptr = VOID2U64(drmMalloc(res.count_planes *
							sizeof(uint32_t)));
		if (!res.plane_id_ptr)
			goto err_allocs;
	}

	if (drmIoctl(fd, DRM_IOCTL_MODE_GETPLANERESOURCES, &res))
		goto err_allocs;

	if (counts.count_planes < res.count_planes) {
		drmFree(U642VOID(res.plane_id_ptr));
		goto retry;
	}

	if (!(r = drmMalloc(sizeof(*r))))
		goto err_allocs;

	r->count_planes = res.count_planes;
	r->planes = drmAllocCpy(U642VOID(res.plane_id_ptr),
				  res.count_planes, sizeof(uint32_t));
	if (res.count_planes && !r->planes) {
		drmFree(r->planes);
		drmFree(r);
		r = 0;
	}

err_allocs:
	drmFree(U642VOID(res.plane_id_ptr));

	return r;
}

int drmModeSetCrtc(int fd, uint32_t crtcId, uint32_t bufferId,
                   uint32_t x, uint32_t y, uint32_t *connectors, int count,
		   drmModeModeInfoPtr mode)
{
	struct drm_mode_crtc crtc;

	crtc.x             = x;
	crtc.y             = y;
	crtc.crtc_id       = crtcId;
	crtc.fb_id         = bufferId;
	crtc.set_connectors_ptr = VOID2U64(connectors);
	crtc.count_connectors = count;
	if (mode) {
	  memcpy(&crtc.mode, mode, sizeof(struct drm_mode_modeinfo));
	  crtc.mode_valid = 1;
	} else
	  crtc.mode_valid = 0;

	return DRM_IOCTL(fd, DRM_IOCTL_MODE_SETCRTC, &crtc);
}

drmModeConnectorPtr drmModeGetConnector(int fd, uint32_t connector_id)
{
	struct drm_mode_get_connector conn, counts;
	drmModeConnectorPtr r = NULL;

retry:
	memset(&conn, 0, sizeof(struct drm_mode_get_connector));
	conn.connector_id = connector_id;

	if (drmIoctl(fd, DRM_IOCTL_MODE_GETCONNECTOR, &conn))
		return 0;

	counts = conn;

	if (conn.count_props) {
		conn.props_ptr = VOID2U64(drmMalloc(conn.count_props*sizeof(uint32_t)));
		if (!conn.props_ptr)
			goto err_allocs;
		conn.prop_values_ptr = VOID2U64(drmMalloc(conn.count_props*sizeof(uint64_t)));
		if (!conn.prop_values_ptr)
			goto err_allocs;
	}

	if (conn.count_modes) {
		conn.modes_ptr = VOID2U64(drmMalloc(conn.count_modes*sizeof(struct drm_mode_modeinfo)));
		if (!conn.modes_ptr)
			goto err_allocs;
	}

	if (conn.count_encoders) {
		conn.encoders_ptr = VOID2U64(drmMalloc(conn.count_encoders*sizeof(uint32_t)));
		if (!conn.encoders_ptr)
			goto err_allocs;
	}

	if (drmIoctl(fd, DRM_IOCTL_MODE_GETCONNECTOR, &conn))
		goto err_allocs;

	/* The number of available connectors and etc may have changed with a
	 * hotplug event in between the ioctls, in which case the field is
	 * silently ignored by the kernel.
	 */
	if (counts.count_props < conn.count_props ||
	    counts.count_modes < conn.count_modes ||
	    counts.count_encoders < conn.count_encoders) {
		drmFree(U642VOID(conn.props_ptr));
		drmFree(U642VOID(conn.prop_values_ptr));
		drmFree(U642VOID(conn.modes_ptr));
		drmFree(U642VOID(conn.encoders_ptr));

		goto retry;
	}

	if(!(r = drmMalloc(sizeof(*r)))) {
		goto err_allocs;
	}

	r->connector_id = conn.connector_id;
	r->encoder_id = conn.encoder_id;
	r->connection   = conn.connection;
	r->mmWidth      = conn.mm_width;
	r->mmHeight     = conn.mm_height;
	/* convert subpixel from kernel to userspace */
	r->subpixel     = conn.subpixel + 1;
	r->count_modes  = conn.count_modes;
	r->count_props  = conn.count_props;
	r->props        = drmAllocCpy(U642VOID(conn.props_ptr), conn.count_props, sizeof(uint32_t));
	r->prop_values  = drmAllocCpy(U642VOID(conn.prop_values_ptr), conn.count_props, sizeof(uint64_t));
	r->modes        = drmAllocCpy(U642VOID(conn.modes_ptr), conn.count_modes, sizeof(struct drm_mode_modeinfo));
	r->count_encoders = conn.count_encoders;
	r->encoders     = drmAllocCpy(U642VOID(conn.encoders_ptr), conn.count_encoders, sizeof(uint32_t));
	r->connector_type  = conn.connector_type;
	r->connector_type_id = conn.connector_type_id;

	if ((r->count_props && !r->props) ||
	    (r->count_props && !r->prop_values) ||
	    (r->count_modes && !r->modes) ||
	    (r->count_encoders && !r->encoders)) {
		drmFree(r->props);
		drmFree(r->prop_values);
		drmFree(r->modes);
		drmFree(r->encoders);
		drmFree(r);
		r = 0;
	}

err_allocs:
	drmFree(U642VOID(conn.prop_values_ptr));
	drmFree(U642VOID(conn.props_ptr));
	drmFree(U642VOID(conn.modes_ptr));
	drmFree(U642VOID(conn.encoders_ptr));

	return r;
}