--- /dev/null
+/**
+ * Copyright (C) 2016 Fuzhou Rockchip Electronics Co., Ltd
+ * author: Jung Zhao jung.zhao@rock-chips.com
+ * Randy Li, randy.li@rock-chips.com
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/slab.h>
+
+#include "iep_iommu_ops.h"
+
+static
+struct iep_iommu_session_info *iep_iommu_get_session_info
+ (struct iep_iommu_info *iommu_info, struct iep_session *session)
+{
+ struct iep_iommu_session_info *session_info = NULL, *n;
+
+ list_for_each_entry_safe(session_info, n, &iommu_info->session_list,
+ head) {
+ if (session_info->session == session)
+ return session_info;
+ }
+
+ return NULL;
+}
+
+int iep_iommu_create(struct iep_iommu_info *iommu_info)
+{
+ if (!iommu_info || !iommu_info->ops->create)
+ return -EINVAL;
+
+ return iommu_info->ops->create(iommu_info);
+}
+
+int iep_iommu_import(struct iep_iommu_info *iommu_info,
+ struct iep_session *session, int fd)
+{
+ struct iep_iommu_session_info *session_info = NULL;
+
+ if (!iommu_info || !iommu_info->ops->import || !session)
+ return -EINVAL;
+
+ session_info = iep_iommu_get_session_info(iommu_info, session);
+ if (!session_info) {
+ session_info = kzalloc(sizeof(*session_info), GFP_KERNEL);
+ if (!session_info)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&session_info->head);
+ INIT_LIST_HEAD(&session_info->buffer_list);
+ mutex_init(&session_info->list_mutex);
+ session_info->max_idx = 0;
+ session_info->session = session;
+ session_info->mmu_dev = iommu_info->mmu_dev;
+ session_info->dev = iommu_info->dev;
+ session_info->iommu_info = iommu_info;
+ session_info->buffer_nums = 0;
+ mutex_lock(&iommu_info->list_mutex);
+ list_add_tail(&session_info->head, &iommu_info->session_list);
+ mutex_unlock(&iommu_info->list_mutex);
+ }
+
+ session_info->debug_level = iommu_info->debug_level;
+
+ return iommu_info->ops->import(session_info, fd);
+}
+
+int iep_iommu_free(struct iep_iommu_info *iommu_info,
+ struct iep_session *session, int idx)
+{
+ struct iep_iommu_session_info *session_info = NULL;
+
+ if (!iommu_info)
+ return -EINVAL;
+
+ session_info = iep_iommu_get_session_info(iommu_info, session);
+
+ if (!iommu_info->ops->free || !session_info)
+ return -EINVAL;
+
+ return iommu_info->ops->free(session_info, idx);
+}
+
+int iep_iommu_free_fd(struct iep_iommu_info *iommu_info,
+ struct iep_session *session, int fd)
+{
+ struct iep_iommu_session_info *session_info = NULL;
+
+ if (!iommu_info)
+ return -EINVAL;
+
+ session_info = iep_iommu_get_session_info(iommu_info, session);
+
+ if (!iommu_info->ops->free_fd || !session_info)
+ return -EINVAL;
+
+ return iommu_info->ops->free_fd(session_info, fd);
+}
+
+int iep_iommu_map_iommu(struct iep_iommu_info *iommu_info,
+ struct iep_session *session,
+ int idx, unsigned long *iova,
+ unsigned long *size)
+{
+ struct iep_iommu_session_info *session_info = NULL;
+
+ if (!iommu_info)
+ return -EINVAL;
+
+ session_info = iep_iommu_get_session_info(iommu_info, session);
+
+ if (!iommu_info->ops->map_iommu || !session_info)
+ return -EINVAL;
+
+ return iommu_info->ops->map_iommu(session_info, idx, iova, size);
+}
+
+int iep_iommu_unmap_iommu(struct iep_iommu_info *iommu_info,
+ struct iep_session *session, int idx)
+{
+ struct iep_iommu_session_info *session_info = NULL;
+
+ if (!iommu_info)
+ return -EINVAL;
+
+ session_info = iep_iommu_get_session_info(iommu_info, session);
+
+ if (!iommu_info->ops->unmap_iommu || !session_info)
+ return -EINVAL;
+
+ return iommu_info->ops->unmap_iommu(session_info, idx);
+}
+
+int iep_iommu_destroy(struct iep_iommu_info *iommu_info)
+{
+ if (!iommu_info || !iommu_info->ops->destroy)
+ return -EINVAL;
+
+ return iommu_info->ops->destroy(iommu_info);
+}
+
+void iep_iommu_dump(struct iep_iommu_info *iommu_info,
+ struct iep_session *session)
+{
+ struct iep_iommu_session_info *session_info = NULL;
+
+ if (!iommu_info)
+ return;
+
+ session_info = iep_iommu_get_session_info(iommu_info, session);
+
+ if (!iommu_info->ops->dump || !session_info)
+ return;
+
+ iommu_info->ops->dump(session_info);
+}
+
+void iep_iommu_clear(struct iep_iommu_info *iommu_info,
+ struct iep_session *session)
+{
+ struct iep_iommu_session_info *session_info = NULL;
+
+ if (!iommu_info)
+ return;
+
+ session_info = iep_iommu_get_session_info(iommu_info, session);
+
+ if (!iommu_info->ops->clear || !session_info)
+ return;
+
+ iommu_info->ops->clear(session_info);
+
+ mutex_lock(&iommu_info->list_mutex);
+ list_del_init(&session_info->head);
+ kfree(session_info);
+ mutex_unlock(&iommu_info->list_mutex);
+}
+
+int iep_iommu_attach(struct iep_iommu_info *iommu_info)
+{
+ if (!iommu_info || !iommu_info->ops->attach)
+ return 0;
+
+ return iommu_info->ops->attach(iommu_info);
+}
+
+void iep_iommu_detach(struct iep_iommu_info *iommu_info)
+{
+ if (!iommu_info || !iommu_info->ops->detach)
+ return;
+
+ return iommu_info->ops->detach(iommu_info);
+}
+
+struct iep_iommu_info *
+iep_iommu_info_create(struct device *dev,
+ struct device *mmu_dev,
+ int alloc_type)
+{
+ struct iep_iommu_info *iommu_info = NULL;
+
+ iommu_info = kzalloc(sizeof(*iommu_info), GFP_KERNEL);
+ if (!iommu_info)
+ return NULL;
+
+ iommu_info->dev = dev;
+ INIT_LIST_HEAD(&iommu_info->session_list);
+ mutex_init(&iommu_info->list_mutex);
+ mutex_init(&iommu_info->iommu_mutex);
+ switch (alloc_type) {
+#ifdef CONFIG_DRM
+ case ALLOCATOR_USE_DRM:
+ iep_iommu_drm_set_ops(iommu_info);
+ break;
+#endif
+#ifdef CONFIG_ION
+ case ALLOCATOR_USE_ION:
+ iep_iommu_ion_set_ops(iommu_info);
+ break;
+#endif
+ default:
+ iommu_info->ops = NULL;
+ break;
+ }
+
+ iommu_info->mmu_dev = mmu_dev;
+
+ iep_iommu_create(iommu_info);
+
+ return iommu_info;
+}
+
+int iep_iommu_info_destroy(struct iep_iommu_info *iommu_info)
+{
+ iep_iommu_destroy(iommu_info);
+ kfree(iommu_info);
+
+ return 0;
+}
projects / firefly-linux-kernel-4.4.55.git / blobdiff