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0439fcff30
Since commit 25559c22ce ("tee: add kernel internal client interface"),
it has been a common include/linux/tee_drv.h header file which is shared
to hold TEE subsystem internal bits along with the APIs exposed to the
TEE client drivers. However, this practice is prone to TEE subsystem
internal APIs abuse and especially so with the new TEE implementation
drivers being added to reuse existing functionality.
In order to address this split TEE subsystem internal bits as a separate
header file: include/linux/tee_core.h which should be the one used by
TEE implementation drivers. With that include/linux/tee_drv.h lists only
APIs exposed by TEE subsystem to the TEE client drivers.
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Balint Dobszay <balint.dobszay@arm.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
// SPDX-License-Identifier: MIT
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/*
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* Copyright 2019 Advanced Micro Devices, Inc.
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*/
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#include <linux/slab.h>
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#include <linux/tee_core.h>
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#include <linux/psp.h>
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#include "amdtee_private.h"
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static int pool_op_alloc(struct tee_shm_pool *pool, struct tee_shm *shm,
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size_t size, size_t align)
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{
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unsigned int order = get_order(size);
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unsigned long va;
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int rc;
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/*
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* Ignore alignment since this is already going to be page aligned
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* and there's no need for any larger alignment.
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*/
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va = __get_free_pages(GFP_KERNEL | __GFP_ZERO, order);
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if (!va)
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return -ENOMEM;
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shm->kaddr = (void *)va;
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shm->paddr = __psp_pa((void *)va);
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shm->size = PAGE_SIZE << order;
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/* Map the allocated memory in to TEE */
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rc = amdtee_map_shmem(shm);
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if (rc) {
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free_pages(va, order);
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shm->kaddr = NULL;
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return rc;
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}
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return 0;
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}
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static void pool_op_free(struct tee_shm_pool *pool, struct tee_shm *shm)
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{
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/* Unmap the shared memory from TEE */
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amdtee_unmap_shmem(shm);
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free_pages((unsigned long)shm->kaddr, get_order(shm->size));
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shm->kaddr = NULL;
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}
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static void pool_op_destroy_pool(struct tee_shm_pool *pool)
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{
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kfree(pool);
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}
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static const struct tee_shm_pool_ops pool_ops = {
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.alloc = pool_op_alloc,
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.free = pool_op_free,
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.destroy_pool = pool_op_destroy_pool,
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};
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struct tee_shm_pool *amdtee_config_shm(void)
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{
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struct tee_shm_pool *pool = kzalloc(sizeof(*pool), GFP_KERNEL);
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if (!pool)
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return ERR_PTR(-ENOMEM);
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pool->ops = &pool_ops;
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return pool;
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}
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