/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2023-2024 Linaro Ltd. */ #ifndef __QCOM_TZMEM_H #define __QCOM_TZMEM_H #include <linux/cleanup.h> #include <linux/gfp.h> #include <linux/types.h> struct device; struct qcom_tzmem_pool; /** * enum qcom_tzmem_policy - Policy for pool growth. */ enum qcom_tzmem_policy { /**< Static pool, never grow above initial size. */ QCOM_TZMEM_POLICY_STATIC = 1, /**< When out of memory, add increment * current size of memory. */ QCOM_TZMEM_POLICY_MULTIPLIER, /**< When out of memory add as much as is needed until max_size. */ QCOM_TZMEM_POLICY_ON_DEMAND, }; /** * struct qcom_tzmem_pool_config - TZ memory pool configuration. * @initial_size: Number of bytes to allocate for the pool during its creation. * @policy: Pool size growth policy. * @increment: Used with policies that allow pool growth. * @max_size: Size above which the pool will never grow. */ struct qcom_tzmem_pool_config { size_t initial_size; enum qcom_tzmem_policy policy; size_t increment; size_t max_size; }; struct qcom_tzmem_pool * qcom_tzmem_pool_new(const struct qcom_tzmem_pool_config *config); void qcom_tzmem_pool_free(struct qcom_tzmem_pool *pool); struct qcom_tzmem_pool * devm_qcom_tzmem_pool_new(struct device *dev, const struct qcom_tzmem_pool_config *config); void *qcom_tzmem_alloc(struct qcom_tzmem_pool *pool, size_t size, gfp_t gfp); void qcom_tzmem_free(void *ptr); DEFINE_FREE(qcom_tzmem, void *, if (_T) qcom_tzmem_free(_T)) phys_addr_t qcom_tzmem_to_phys(void *ptr); #endif /* __QCOM_TZMEM */