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8aa1e3a6f0
Anyone with access to contiguous physical memory should be able to share memory with QTEE using shm_bridge. Tested-by: Neil Armstrong <neil.armstrong@linaro.org> Tested-by: Harshal Dev <quic_hdev@quicinc.com> Reviewed-by: Kuldeep Singh <quic_kuldsing@quicinc.com> Signed-off-by: Amirreza Zarrabi <amirreza.zarrabi@oss.qualcomm.com> Link: https://lore.kernel.org/r/20250911-qcom-tee-using-tee-ss-without-mem-obj-v12-1-17f07a942b8d@oss.qualcomm.com Signed-off-by: Bjorn Andersson <andersson@kernel.org>
72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2023-2024 Linaro Ltd.
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*/
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#ifndef __QCOM_TZMEM_H
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#define __QCOM_TZMEM_H
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#include <linux/cleanup.h>
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#include <linux/gfp.h>
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#include <linux/types.h>
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struct device;
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struct qcom_tzmem_pool;
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/**
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* enum qcom_tzmem_policy - Policy for pool growth.
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*/
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enum qcom_tzmem_policy {
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/**< Static pool, never grow above initial size. */
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QCOM_TZMEM_POLICY_STATIC = 1,
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/**< When out of memory, add increment * current size of memory. */
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QCOM_TZMEM_POLICY_MULTIPLIER,
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/**< When out of memory add as much as is needed until max_size. */
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QCOM_TZMEM_POLICY_ON_DEMAND,
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};
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/**
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* struct qcom_tzmem_pool_config - TZ memory pool configuration.
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* @initial_size: Number of bytes to allocate for the pool during its creation.
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* @policy: Pool size growth policy.
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* @increment: Used with policies that allow pool growth.
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* @max_size: Size above which the pool will never grow.
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*/
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struct qcom_tzmem_pool_config {
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size_t initial_size;
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enum qcom_tzmem_policy policy;
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size_t increment;
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size_t max_size;
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};
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struct qcom_tzmem_pool *
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qcom_tzmem_pool_new(const struct qcom_tzmem_pool_config *config);
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void qcom_tzmem_pool_free(struct qcom_tzmem_pool *pool);
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struct qcom_tzmem_pool *
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devm_qcom_tzmem_pool_new(struct device *dev,
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const struct qcom_tzmem_pool_config *config);
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void *qcom_tzmem_alloc(struct qcom_tzmem_pool *pool, size_t size, gfp_t gfp);
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void qcom_tzmem_free(void *ptr);
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DEFINE_FREE(qcom_tzmem, void *, if (_T) qcom_tzmem_free(_T))
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phys_addr_t qcom_tzmem_to_phys(void *ptr);
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#if IS_ENABLED(CONFIG_QCOM_TZMEM_MODE_SHMBRIDGE)
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int qcom_tzmem_shm_bridge_create(phys_addr_t paddr, size_t size, u64 *handle);
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void qcom_tzmem_shm_bridge_delete(u64 handle);
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#else
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static inline int qcom_tzmem_shm_bridge_create(phys_addr_t paddr,
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size_t size, u64 *handle)
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{
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return 0;
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}
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static inline void qcom_tzmem_shm_bridge_delete(u64 handle)
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{
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}
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#endif
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#endif /* __QCOM_TZMEM */
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