mirror of https://github.com/OpenIPC/firmware.git
624 lines
16 KiB
Diff
624 lines
16 KiB
Diff
diff -drupN a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c
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--- a/drivers/tee/tee_shm.c 1970-01-01 03:00:00.000000000 +0300
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+++ b/drivers/tee/tee_shm.c 2022-06-12 05:28:14.000000000 +0300
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@@ -0,0 +1,619 @@
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+/*
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+ * Copyright (c) 2015-2016, Linaro Limited
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+ *
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+ * This software is licensed under the terms of the GNU General Public
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+ * License version 2, as published by the Free Software Foundation, and
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+ * may be copied, distributed, and modified under those terms.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ */
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+#include <linux/device.h>
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+#include <linux/dma-buf.h>
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+#include <linux/fdtable.h>
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+#include <linux/idr.h>
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+#include <linux/sched.h>
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+#include <linux/slab.h>
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+#include <linux/tee_drv.h>
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+#include "tee_private.h"
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+
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+/* extra references appended to shm object for registered shared memory */
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+struct tee_shm_dmabuf_ref {
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+ struct tee_shm shm;
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+ struct dma_buf *dmabuf;
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+ struct dma_buf_attachment *attach;
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+ struct sg_table *sgt;
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+};
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+
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+static void tee_shm_release(struct tee_shm *shm)
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+{
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+ struct tee_device *teedev = shm->teedev;
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+
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+ mutex_lock(&teedev->mutex);
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+ idr_remove(&teedev->idr, shm->id);
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+ if (shm->ctx)
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+ list_del(&shm->link);
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+ mutex_unlock(&teedev->mutex);
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+
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+ if (shm->flags & TEE_SHM_EXT_DMA_BUF) {
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+ struct tee_shm_dmabuf_ref *ref;
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+
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+ ref = container_of(shm, struct tee_shm_dmabuf_ref, shm);
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+ dma_buf_unmap_attachment(ref->attach, ref->sgt,
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+ DMA_BIDIRECTIONAL);
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+ dma_buf_detach(shm->dmabuf, ref->attach);
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+ dma_buf_put(ref->dmabuf);
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+ } else if (shm->flags & TEE_SHM_POOL) {
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+ struct tee_shm_pool_mgr *poolm;
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+
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+ if (shm->flags & TEE_SHM_DMA_BUF)
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+ poolm = teedev->pool->dma_buf_mgr;
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+ else
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+ poolm = teedev->pool->private_mgr;
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+
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+ poolm->ops->free(poolm, shm);
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+ } else if (shm->flags & TEE_SHM_REGISTER) {
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+ size_t n;
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+ int rc = teedev->desc->ops->shm_unregister(shm->ctx, shm);
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+
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+ if (rc)
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+ dev_err(teedev->dev.parent,
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+ "unregister shm %p failed: %d", shm, rc);
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+
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+ for (n = 0; n < shm->num_pages; n++)
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+ put_page(shm->pages[n]);
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+
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+ kfree(shm->pages);
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+ }
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+
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+ if (shm->ctx)
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+ teedev_ctx_put(shm->ctx);
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+
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+ kfree(shm);
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+ tee_device_put(teedev);
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+}
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+
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+static struct sg_table *tee_shm_op_map_dma_buf(struct dma_buf_attachment
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+ *attach, enum dma_data_direction dir)
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+{
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+ return NULL;
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+}
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+
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+static void tee_shm_op_unmap_dma_buf(struct dma_buf_attachment *attach,
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+ struct sg_table *table,
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+ enum dma_data_direction dir)
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+{
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+}
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+
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+static void tee_shm_op_release(struct dma_buf *dmabuf)
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+{
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+ struct tee_shm *shm = dmabuf->priv;
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+
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+ tee_shm_release(shm);
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+}
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+
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+static void *tee_shm_op_kmap_atomic(struct dma_buf *dmabuf, unsigned long pgnum)
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+{
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+ return NULL;
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+}
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+
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+static void *tee_shm_op_kmap(struct dma_buf *dmabuf, unsigned long pgnum)
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+{
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+ return NULL;
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+}
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+
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+static int tee_shm_op_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma)
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+{
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+ struct tee_shm *shm = dmabuf->priv;
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+ size_t size = vma->vm_end - vma->vm_start;
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+
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+ /* Refuse sharing shared memory provided by application */
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+ if (shm->flags & TEE_SHM_REGISTER)
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+ return -EINVAL;
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+
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+ return remap_pfn_range(vma, vma->vm_start, shm->paddr >> PAGE_SHIFT,
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+ size, vma->vm_page_prot);
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+}
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+
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+static const struct dma_buf_ops tee_shm_dma_buf_ops = {
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+ .map_dma_buf = tee_shm_op_map_dma_buf,
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+ .unmap_dma_buf = tee_shm_op_unmap_dma_buf,
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+ .release = tee_shm_op_release,
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+ .kmap_atomic = tee_shm_op_kmap_atomic,
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+ .kmap = tee_shm_op_kmap,
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+ .mmap = tee_shm_op_mmap,
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+};
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+
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+static struct tee_shm *__tee_shm_alloc(struct tee_context *ctx,
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+ struct tee_device *teedev,
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+ size_t size, u32 flags)
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+{
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+ struct tee_shm_pool_mgr *poolm = NULL;
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+ struct tee_shm *shm;
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+ void *ret;
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+ int rc;
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+
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+ if (ctx && ctx->teedev != teedev) {
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+ dev_err(teedev->dev.parent, "ctx and teedev mismatch\n");
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+ return ERR_PTR(-EINVAL);
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+ }
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+
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+ if (!(flags & TEE_SHM_MAPPED)) {
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+ dev_err(teedev->dev.parent,
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+ "only mapped allocations supported\n");
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+ return ERR_PTR(-EINVAL);
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+ }
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+
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+ if ((flags & ~(TEE_SHM_MAPPED | TEE_SHM_DMA_BUF))) {
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+ dev_err(teedev->dev.parent, "invalid shm flags 0x%x", flags);
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+ return ERR_PTR(-EINVAL);
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+ }
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+
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+ if (!tee_device_get(teedev))
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+ return ERR_PTR(-EINVAL);
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+
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+ if (!teedev->pool) {
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+ /* teedev has been detached from driver */
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+ ret = ERR_PTR(-EINVAL);
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+ goto err_dev_put;
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+ }
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+
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+ shm = kzalloc(sizeof(*shm), GFP_KERNEL);
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+ if (!shm) {
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+ ret = ERR_PTR(-ENOMEM);
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+ goto err_dev_put;
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+ }
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+
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+ shm->flags = flags | TEE_SHM_POOL;
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+ shm->teedev = teedev;
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+ shm->ctx = ctx;
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+ if (flags & TEE_SHM_DMA_BUF)
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+ poolm = teedev->pool->dma_buf_mgr;
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+ else
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+ poolm = teedev->pool->private_mgr;
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+
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+ rc = poolm->ops->alloc(poolm, shm, size);
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+ if (rc) {
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+ ret = ERR_PTR(rc);
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+ goto err_kfree;
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+ }
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+
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+ mutex_lock(&teedev->mutex);
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+ shm->id = idr_alloc(&teedev->idr, shm, 1, 0, GFP_KERNEL);
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+ mutex_unlock(&teedev->mutex);
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+ if (shm->id < 0) {
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+ ret = ERR_PTR(shm->id);
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+ goto err_pool_free;
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+ }
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+
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+ if (flags & TEE_SHM_DMA_BUF) {
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+ DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
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+
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+ exp_info.ops = &tee_shm_dma_buf_ops;
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+ exp_info.size = shm->size;
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+ exp_info.flags = O_RDWR;
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+ exp_info.priv = shm;
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+
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+ shm->dmabuf = dma_buf_export(&exp_info);
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+ if (IS_ERR(shm->dmabuf)) {
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+ ret = ERR_CAST(shm->dmabuf);
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+ goto err_rem;
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+ }
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+ }
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+
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+ if (ctx) {
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+ teedev_ctx_get(ctx);
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+ mutex_lock(&teedev->mutex);
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+ list_add_tail(&shm->link, &ctx->list_shm);
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+ mutex_unlock(&teedev->mutex);
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+ }
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+
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+ return shm;
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+err_rem:
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+ mutex_lock(&teedev->mutex);
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+ idr_remove(&teedev->idr, shm->id);
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+ mutex_unlock(&teedev->mutex);
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+err_pool_free:
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+ poolm->ops->free(poolm, shm);
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+err_kfree:
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+ kfree(shm);
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+err_dev_put:
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+ tee_device_put(teedev);
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+ return ret;
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+}
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+
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+/**
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+ * tee_shm_alloc() - Allocate shared memory
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+ * @ctx: Context that allocates the shared memory
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+ * @size: Requested size of shared memory
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+ * @flags: Flags setting properties for the requested shared memory.
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+ *
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+ * Memory allocated as global shared memory is automatically freed when the
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+ * TEE file pointer is closed. The @flags field uses the bits defined by
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+ * TEE_SHM_* in <linux/tee_drv.h>. TEE_SHM_MAPPED must currently always be
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+ * set. If TEE_SHM_DMA_BUF global shared memory will be allocated and
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+ * associated with a dma-buf handle, else driver private memory.
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+ */
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+struct tee_shm *tee_shm_alloc(struct tee_context *ctx, size_t size, u32 flags)
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+{
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+ return __tee_shm_alloc(ctx, ctx->teedev, size, flags);
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+}
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+EXPORT_SYMBOL_GPL(tee_shm_alloc);
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+
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+struct tee_shm *tee_shm_priv_alloc(struct tee_device *teedev, size_t size)
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+{
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+ return __tee_shm_alloc(NULL, teedev, size, TEE_SHM_MAPPED);
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+}
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+EXPORT_SYMBOL_GPL(tee_shm_priv_alloc);
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+
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+struct tee_shm *tee_shm_register(struct tee_context *ctx, unsigned long addr,
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+ size_t length, u32 flags)
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+{
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+ struct tee_device *teedev = ctx->teedev;
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+ const u32 req_flags = TEE_SHM_DMA_BUF | TEE_SHM_USER_MAPPED;
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+ struct tee_shm *shm;
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+ void *ret;
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+ int rc;
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+ int num_pages;
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+ unsigned long start;
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+
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+ if (flags != req_flags)
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+ return ERR_PTR(-ENOTSUPP);
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+
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+ if (!tee_device_get(teedev))
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+ return ERR_PTR(-EINVAL);
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+
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+ if (!teedev->desc->ops->shm_register ||
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+ !teedev->desc->ops->shm_unregister) {
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+ tee_device_put(teedev);
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+ return ERR_PTR(-ENOTSUPP);
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+ }
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+
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+ teedev_ctx_get(ctx);
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+
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+ shm = kzalloc(sizeof(*shm), GFP_KERNEL);
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+ if (!shm) {
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+ ret = ERR_PTR(-ENOMEM);
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+ goto err;
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+ }
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+
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+ shm->flags = flags | TEE_SHM_REGISTER;
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+ shm->teedev = teedev;
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+ shm->ctx = ctx;
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+ shm->id = -1;
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+ start = rounddown(addr, PAGE_SIZE);
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+ shm->offset = addr - start;
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+ shm->size = length;
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+ num_pages = (roundup(addr + length, PAGE_SIZE) - start) / PAGE_SIZE;
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+ shm->pages = kcalloc(num_pages, sizeof(*shm->pages), GFP_KERNEL);
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+ if (!shm->pages) {
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+ ret = ERR_PTR(-ENOMEM);
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+ goto err;
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+ }
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+
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+ rc = get_user_pages_fast(start, num_pages, 1, shm->pages);
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+ if (rc > 0)
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+ shm->num_pages = rc;
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+ if (rc != num_pages) {
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+ if (rc >= 0)
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+ rc = -ENOMEM;
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+ ret = ERR_PTR(rc);
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+ goto err;
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+ }
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+
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+ mutex_lock(&teedev->mutex);
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+ shm->id = idr_alloc(&teedev->idr, shm, 1, 0, GFP_KERNEL);
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+ mutex_unlock(&teedev->mutex);
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+
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+ if (shm->id < 0) {
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+ ret = ERR_PTR(shm->id);
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+ goto err;
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+ }
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+
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+ rc = teedev->desc->ops->shm_register(ctx, shm, shm->pages,
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+ shm->num_pages, start);
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+ if (rc) {
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+ ret = ERR_PTR(rc);
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+ goto err;
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+ }
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+
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+ if (flags & TEE_SHM_DMA_BUF) {
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+ DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
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+
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+ exp_info.ops = &tee_shm_dma_buf_ops;
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+ exp_info.size = shm->size;
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+ exp_info.flags = O_RDWR;
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+ exp_info.priv = shm;
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+
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+ shm->dmabuf = dma_buf_export(&exp_info);
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+ if (IS_ERR(shm->dmabuf)) {
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+ ret = ERR_CAST(shm->dmabuf);
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+ teedev->desc->ops->shm_unregister(ctx, shm);
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+ goto err;
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+ }
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+ }
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+
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+ mutex_lock(&teedev->mutex);
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+ list_add_tail(&shm->link, &ctx->list_shm);
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+ mutex_unlock(&teedev->mutex);
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+
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+ return shm;
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+err:
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+ if (shm) {
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+ size_t n;
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+
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+ if (shm->id >= 0) {
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+ mutex_lock(&teedev->mutex);
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+ idr_remove(&teedev->idr, shm->id);
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+ mutex_unlock(&teedev->mutex);
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+ }
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+ if (shm->pages) {
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+ for (n = 0; n < shm->num_pages; n++)
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+ put_page(shm->pages[n]);
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+ kfree(shm->pages);
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+ }
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+ }
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+ kfree(shm);
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+ teedev_ctx_put(ctx);
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+ tee_device_put(teedev);
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+ return ret;
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+}
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+EXPORT_SYMBOL_GPL(tee_shm_register);
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+
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+struct tee_shm *tee_shm_register_fd(struct tee_context *ctx, int fd)
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+{
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+ struct tee_shm_dmabuf_ref *ref;
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+ void *rc;
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+ DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
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+
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+ if (!tee_device_get(ctx->teedev))
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+ return ERR_PTR(-EINVAL);
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+
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+ ref = kzalloc(sizeof(*ref), GFP_KERNEL);
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+ if (!ref) {
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+ rc = ERR_PTR(-ENOMEM);
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+ goto err;
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+ }
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+
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+ ref->shm.ctx = ctx;
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+ ref->shm.teedev = ctx->teedev;
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+ ref->shm.id = -1;
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+
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+ ref->dmabuf = dma_buf_get(fd);
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+ if (!ref->dmabuf) {
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+ rc = ERR_PTR(-EINVAL);
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+ goto err;
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+ }
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+
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+ ref->attach = dma_buf_attach(ref->dmabuf, &ref->shm.teedev->dev);
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+ if (IS_ERR_OR_NULL(ref->attach)) {
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+ rc = ERR_PTR(-EINVAL);
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+ goto err;
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+ }
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+
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+ ref->sgt = dma_buf_map_attachment(ref->attach, DMA_BIDIRECTIONAL);
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+ if (IS_ERR_OR_NULL(ref->sgt)) {
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+ rc = ERR_PTR(-EINVAL);
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+ goto err;
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+ }
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+
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+ if (sg_nents(ref->sgt->sgl) != 1) {
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+ rc = ERR_PTR(-EINVAL);
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+ goto err;
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+ }
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+
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+ ref->shm.paddr = sg_dma_address(ref->sgt->sgl);
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+ ref->shm.size = sg_dma_len(ref->sgt->sgl);
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+ ref->shm.flags = TEE_SHM_DMA_BUF | TEE_SHM_EXT_DMA_BUF;
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+
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+ mutex_lock(&ref->shm.teedev->mutex);
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+ ref->shm.id = idr_alloc(&ref->shm.teedev->idr, &ref->shm,
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+ 1, 0, GFP_KERNEL);
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+ mutex_unlock(&ref->shm.teedev->mutex);
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+ if (ref->shm.id < 0) {
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+ rc = ERR_PTR(ref->shm.id);
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+ goto err;
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+ }
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+
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+ /* export a dmabuf to later get a userland ref */
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+ exp_info.ops = &tee_shm_dma_buf_ops;
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+ exp_info.size = ref->shm.size;
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+ exp_info.flags = O_RDWR;
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+ exp_info.priv = &ref->shm;
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+
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+ ref->shm.dmabuf = dma_buf_export(&exp_info);
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+ if (IS_ERR(ref->shm.dmabuf)) {
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+ rc = ERR_PTR(-EINVAL);
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+ goto err;
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+ }
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+
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+ mutex_lock(&ref->shm.teedev->mutex);
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+ list_add_tail(&ref->shm.link, &ctx->list_shm);
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+ mutex_unlock(&ref->shm.teedev->mutex);
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+
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+ return &ref->shm;
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+
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+err:
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+ if (ref) {
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+ if (ref->shm.id >= 0) {
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+ mutex_lock(&ctx->teedev->mutex);
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+ idr_remove(&ctx->teedev->idr, ref->shm.id);
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+ mutex_unlock(&ctx->teedev->mutex);
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+ }
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+ if (ref->sgt)
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+ dma_buf_unmap_attachment(ref->attach, ref->sgt,
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+ DMA_BIDIRECTIONAL);
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+ if (ref->attach)
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+ dma_buf_detach(ref->dmabuf, ref->attach);
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+ if (ref->dmabuf)
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+ dma_buf_put(ref->dmabuf);
|
|
+ }
|
|
+ kfree(ref);
|
|
+ tee_device_put(ctx->teedev);
|
|
+ return rc;
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(tee_shm_register_fd);
|
|
+
|
|
+/**
|
|
+ * tee_shm_get_fd() - Increase reference count and return file descriptor
|
|
+ * @shm: Shared memory handle
|
|
+ * @returns user space file descriptor to shared memory
|
|
+ */
|
|
+int tee_shm_get_fd(struct tee_shm *shm)
|
|
+{
|
|
+ int fd;
|
|
+
|
|
+ if (!(shm->flags & TEE_SHM_DMA_BUF))
|
|
+ return -EINVAL;
|
|
+
|
|
+ fd = dma_buf_fd(shm->dmabuf, O_CLOEXEC);
|
|
+ if (fd >= 0)
|
|
+ get_dma_buf(shm->dmabuf);
|
|
+ return fd;
|
|
+}
|
|
+
|
|
+/**
|
|
+ * tee_shm_free() - Free shared memory
|
|
+ * @shm: Handle to shared memory to free
|
|
+ */
|
|
+void tee_shm_free(struct tee_shm *shm)
|
|
+{
|
|
+ /*
|
|
+ * dma_buf_put() decreases the dmabuf reference counter and will
|
|
+ * call tee_shm_release() when the last reference is gone.
|
|
+ *
|
|
+ * In the case of driver private memory we call tee_shm_release
|
|
+ * directly instead as it doesn't have a reference counter.
|
|
+ */
|
|
+ if (shm->flags & TEE_SHM_DMA_BUF)
|
|
+ dma_buf_put(shm->dmabuf);
|
|
+ else
|
|
+ tee_shm_release(shm);
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(tee_shm_free);
|
|
+
|
|
+/**
|
|
+ * tee_shm_va2pa() - Get physical address of a virtual address
|
|
+ * @shm: Shared memory handle
|
|
+ * @va: Virtual address to tranlsate
|
|
+ * @pa: Returned physical address
|
|
+ * @returns 0 on success and < 0 on failure
|
|
+ */
|
|
+int tee_shm_va2pa(struct tee_shm *shm, void *va, phys_addr_t *pa)
|
|
+{
|
|
+ if (!(shm->flags & TEE_SHM_MAPPED))
|
|
+ return -EINVAL;
|
|
+ /* Check that we're in the range of the shm */
|
|
+ if ((char *)va < (char *)shm->kaddr)
|
|
+ return -EINVAL;
|
|
+ if ((char *)va >= ((char *)shm->kaddr + shm->size))
|
|
+ return -EINVAL;
|
|
+
|
|
+ return tee_shm_get_pa(
|
|
+ shm, (unsigned long)va - (unsigned long)shm->kaddr, pa);
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(tee_shm_va2pa);
|
|
+
|
|
+/**
|
|
+ * tee_shm_pa2va() - Get virtual address of a physical address
|
|
+ * @shm: Shared memory handle
|
|
+ * @pa: Physical address to tranlsate
|
|
+ * @va: Returned virtual address
|
|
+ * @returns 0 on success and < 0 on failure
|
|
+ */
|
|
+int tee_shm_pa2va(struct tee_shm *shm, phys_addr_t pa, void **va)
|
|
+{
|
|
+ if (!(shm->flags & TEE_SHM_MAPPED))
|
|
+ return -EINVAL;
|
|
+ /* Check that we're in the range of the shm */
|
|
+ if (pa < shm->paddr)
|
|
+ return -EINVAL;
|
|
+ if (pa >= (shm->paddr + shm->size))
|
|
+ return -EINVAL;
|
|
+
|
|
+ if (va) {
|
|
+ void *v = tee_shm_get_va(shm, pa - shm->paddr);
|
|
+
|
|
+ if (IS_ERR(v))
|
|
+ return PTR_ERR(v);
|
|
+ *va = v;
|
|
+ }
|
|
+ return 0;
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(tee_shm_pa2va);
|
|
+
|
|
+/**
|
|
+ * tee_shm_get_va() - Get virtual address of a shared memory plus an offset
|
|
+ * @shm: Shared memory handle
|
|
+ * @offs: Offset from start of this shared memory
|
|
+ * @returns virtual address of the shared memory + offs if offs is within
|
|
+ * the bounds of this shared memory, else an ERR_PTR
|
|
+ */
|
|
+void *tee_shm_get_va(struct tee_shm *shm, size_t offs)
|
|
+{
|
|
+ if (!(shm->flags & TEE_SHM_MAPPED))
|
|
+ return ERR_PTR(-EINVAL);
|
|
+ if (offs >= shm->size)
|
|
+ return ERR_PTR(-EINVAL);
|
|
+ return (char *)shm->kaddr + offs;
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(tee_shm_get_va);
|
|
+
|
|
+/**
|
|
+ * tee_shm_get_pa() - Get physical address of a shared memory plus an offset
|
|
+ * @shm: Shared memory handle
|
|
+ * @offs: Offset from start of this shared memory
|
|
+ * @pa: Physical address to return
|
|
+ * @returns 0 if offs is within the bounds of this shared memory, else an
|
|
+ * error code.
|
|
+ */
|
|
+int tee_shm_get_pa(struct tee_shm *shm, size_t offs, phys_addr_t *pa)
|
|
+{
|
|
+ if (offs >= shm->size)
|
|
+ return -EINVAL;
|
|
+ if (pa)
|
|
+ *pa = shm->paddr + offs;
|
|
+ return 0;
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(tee_shm_get_pa);
|
|
+
|
|
+/**
|
|
+ * tee_shm_get_from_id() - Find shared memory object and increase reference
|
|
+ * count
|
|
+ * @ctx: Context owning the shared memory
|
|
+ * @id: Id of shared memory object
|
|
+ * @returns a pointer to 'struct tee_shm' on success or an ERR_PTR on failure
|
|
+ */
|
|
+struct tee_shm *tee_shm_get_from_id(struct tee_context *ctx, int id)
|
|
+{
|
|
+ struct tee_device *teedev;
|
|
+ struct tee_shm *shm;
|
|
+
|
|
+ if (!ctx)
|
|
+ return ERR_PTR(-EINVAL);
|
|
+
|
|
+ teedev = ctx->teedev;
|
|
+ mutex_lock(&teedev->mutex);
|
|
+ shm = idr_find(&teedev->idr, id);
|
|
+ if (!shm || shm->ctx != ctx)
|
|
+ shm = ERR_PTR(-EINVAL);
|
|
+ else if (shm->flags & TEE_SHM_DMA_BUF)
|
|
+ get_dma_buf(shm->dmabuf);
|
|
+ mutex_unlock(&teedev->mutex);
|
|
+ return shm;
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(tee_shm_get_from_id);
|
|
+
|
|
+/**
|
|
+ * tee_shm_put() - Decrease reference count on a shared memory handle
|
|
+ * @shm: Shared memory handle
|
|
+ */
|
|
+void tee_shm_put(struct tee_shm *shm)
|
|
+{
|
|
+ if (shm->flags & TEE_SHM_DMA_BUF)
|
|
+ dma_buf_put(shm->dmabuf);
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(tee_shm_put);
|