/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* The On Chip Memory (OCMEM) allocator allows various clients to allocate
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* memory from OCMEM based on performance, latency and power requirements.
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* This is typically used by the GPU, camera/video, and audio components on
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* some Snapdragon SoCs.
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*
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* Copyright (C) 2019 Brian Masney <masneyb@onstation.org>
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* Copyright (C) 2015 Red Hat. Author: Rob Clark <robdclark@gmail.com>
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*/
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#include <linux/device.h>
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#include <linux/err.h>
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#ifndef __OCMEM_H__
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#define __OCMEM_H__
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enum ocmem_client {
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/* GMEM clients */
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OCMEM_GRAPHICS = 0x0,
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/*
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* TODO add more once ocmem_allocate() is clever enough to
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* deal with multiple clients.
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*/
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OCMEM_CLIENT_MAX,
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};
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struct ocmem;
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struct ocmem_buf {
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unsigned long offset;
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unsigned long addr;
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unsigned long len;
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};
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#if IS_ENABLED(CONFIG_QCOM_OCMEM)
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struct ocmem *of_get_ocmem(struct device *dev);
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struct ocmem_buf *ocmem_allocate(struct ocmem *ocmem, enum ocmem_client client,
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unsigned long size);
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void ocmem_free(struct ocmem *ocmem, enum ocmem_client client,
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struct ocmem_buf *buf);
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#else /* IS_ENABLED(CONFIG_QCOM_OCMEM) */
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static inline struct ocmem *of_get_ocmem(struct device *dev)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct ocmem_buf *ocmem_allocate(struct ocmem *ocmem,
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enum ocmem_client client,
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unsigned long size)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline void ocmem_free(struct ocmem *ocmem, enum ocmem_client client,
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struct ocmem_buf *buf)
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{
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}
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#endif /* IS_ENABLED(CONFIG_QCOM_OCMEM) */
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#endif /* __OCMEM_H__ */
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