samples/vfio-mdev/mbochs.c

819 	struct mbochs_dmabuf *dmabuf = vma->vm_private_data;
821 	if (WARN_ON(vmf->pgoff >= dmabuf->pagecount))
824 	vmf->page = dmabuf->pages[vmf->pgoff];
835 	struct mbochs_dmabuf *dmabuf = buf->priv;
836 	struct device *dev = mdev_dev(dmabuf->mdev_state->mdev);
838 	dev_dbg(dev, "%s: %d\n", __func__, dmabuf->id);
844 	vma->vm_private_data = dmabuf;
848 static void mbochs_print_dmabuf(struct mbochs_dmabuf *dmabuf,
851 	struct device *dev = mdev_dev(dmabuf->mdev_state->mdev);
852 	u32 fourcc = dmabuf->mode.drm_format;
855 		prefix, dmabuf->id,
860 		dmabuf->mode.width, dmabuf->mode.height, dmabuf->mode.stride,
861 		dmabuf->mode.offset, dmabuf->mode.size, dmabuf->pagecount);
867 	struct mbochs_dmabuf *dmabuf = at->dmabuf->priv;
868 	struct device *dev = mdev_dev(dmabuf->mdev_state->mdev);
871 	dev_dbg(dev, "%s: %d\n", __func__, dmabuf->id);
876 	if (sg_alloc_table_from_pages(sg, dmabuf->pages, dmabuf->pagecount,
877 				      0, dmabuf->mode.size, GFP_KERNEL) < 0)
896 	struct mbochs_dmabuf *dmabuf = at->dmabuf->priv;
897 	struct device *dev = mdev_dev(dmabuf->mdev_state->mdev);
899 	dev_dbg(dev, "%s: %d\n", __func__, dmabuf->id);
908 	struct mbochs_dmabuf *dmabuf = buf->priv;
909 	struct mdev_state *mdev_state = dmabuf->mdev_state;
913 	dev_dbg(dev, "%s: %d\n", __func__, dmabuf->id);
915 	for (pg = 0; pg < dmabuf->pagecount; pg++)
916 		put_page(dmabuf->pages[pg]);
919 	dmabuf->buf = NULL;
920 	if (dmabuf->unlinked)
921 		kfree(dmabuf);
935 	struct mbochs_dmabuf *dmabuf;
940 	dmabuf = kzalloc(sizeof(struct mbochs_dmabuf), GFP_KERNEL);
941 	if (!dmabuf)
944 	dmabuf->mode = *mode;
945 	dmabuf->id = mdev_state->next_id++;
946 	dmabuf->pagecount = DIV_ROUND_UP(mode->size, PAGE_SIZE);
947 	dmabuf->pages = kcalloc(dmabuf->pagecount, sizeof(struct page *),
949 	if (!dmabuf->pages)
952 	page_offset = dmabuf->mode.offset >> PAGE_SHIFT;
953 	for (pg = 0; pg < dmabuf->pagecount; pg++) {
954 		dmabuf->pages[pg] = __mbochs_get_page(mdev_state,
956 		if (!dmabuf->pages[pg])
960 	dmabuf->mdev_state = mdev_state;
961 	list_add(&dmabuf->next, &mdev_state->dmabufs);
963 	mbochs_print_dmabuf(dmabuf, __func__);
964 	return dmabuf;
968 		put_page(dmabuf->pages[--pg]);
969 	kfree(dmabuf->pages);
971 	kfree(dmabuf);
979 	struct mbochs_dmabuf *dmabuf;
983 	list_for_each_entry(dmabuf, &mdev_state->dmabufs, next)
984 		if (mbochs_modes_equal(&dmabuf->mode, mode))
985 			return dmabuf;
993 	struct mbochs_dmabuf *dmabuf;
997 	list_for_each_entry(dmabuf, &mdev_state->dmabufs, next)
998 		if (dmabuf->id == id)
999 			return dmabuf;
1004 static int mbochs_dmabuf_export(struct mbochs_dmabuf *dmabuf)
1006 	struct mdev_state *mdev_state = dmabuf->mdev_state;
1013 	if (!IS_ALIGNED(dmabuf->mode.offset, PAGE_SIZE)) {
1020 	exp_info.size = dmabuf->mode.size;
1021 	exp_info.priv = dmabuf;
1030 	dmabuf->buf = buf;
1031 	dev_dbg(dev, "%s: %d\n", __func__, dmabuf->id);
1103 	struct mbochs_dmabuf *dmabuf;
1138 	dmabuf = mbochs_dmabuf_find_by_mode(mdev_state, &mode);
1139 	if (!dmabuf)
1141 	if (!dmabuf) {
1146 	plane->drm_format     = dmabuf->mode.drm_format;
1147 	plane->width	      = dmabuf->mode.width;
1148 	plane->height	      = dmabuf->mode.height;
1149 	plane->stride	      = dmabuf->mode.stride;
1150 	plane->size	      = dmabuf->mode.size;
1151 	plane->dmabuf_id      = dmabuf->id;
1166 	struct mbochs_dmabuf *dmabuf;
1170 	dmabuf = mbochs_dmabuf_find_by_id(mdev_state, id);
1171 	if (!dmabuf) {
1176 	if (!dmabuf->buf)
1177 		mbochs_dmabuf_export(dmabuf);
1181 	if (!dmabuf->buf)
1184 	return dma_buf_fd(dmabuf->buf, 0);
1311 	struct mbochs_dmabuf *dmabuf, *tmp;
1315 	list_for_each_entry_safe(dmabuf, tmp, &mdev_state->dmabufs, next) {
1316 		list_del(&dmabuf->next);
1317 		if (dmabuf->buf) {
1319 			dmabuf->unlinked = true;
1321 			kfree(dmabuf);