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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * The On Chip Memory (OCMEM) allocator allows various clients to allocate4 * memory from OCMEM based on performance, latency and power requirements.5 * This is typically used by the GPU, camera/video, and audio components on6 * some Snapdragon SoCs.7 *8 * Copyright (C) 2019 Brian Masney <masneyb@onstation.org>9 * Copyright (C) 2015 Red Hat. Author: Rob Clark <robdclark@gmail.com>10 */11 12#include <linux/device.h>13#include <linux/err.h>14 15#ifndef __OCMEM_H__16#define __OCMEM_H__17 18enum ocmem_client {19 /* GMEM clients */20 OCMEM_GRAPHICS = 0x0,21 /*22 * TODO add more once ocmem_allocate() is clever enough to23 * deal with multiple clients.24 */25 OCMEM_CLIENT_MAX,26};27 28struct ocmem;29 30struct ocmem_buf {31 unsigned long offset;32 unsigned long addr;33 unsigned long len;34};35 36#if IS_ENABLED(CONFIG_QCOM_OCMEM)37 38struct ocmem *of_get_ocmem(struct device *dev);39struct ocmem_buf *ocmem_allocate(struct ocmem *ocmem, enum ocmem_client client,40 unsigned long size);41void ocmem_free(struct ocmem *ocmem, enum ocmem_client client,42 struct ocmem_buf *buf);43 44#else /* IS_ENABLED(CONFIG_QCOM_OCMEM) */45 46static inline struct ocmem *of_get_ocmem(struct device *dev)47{48 return ERR_PTR(-ENODEV);49}50 51static inline struct ocmem_buf *ocmem_allocate(struct ocmem *ocmem,52 enum ocmem_client client,53 unsigned long size)54{55 return ERR_PTR(-ENODEV);56}57 58static inline void ocmem_free(struct ocmem *ocmem, enum ocmem_client client,59 struct ocmem_buf *buf)60{61}62 63#endif /* IS_ENABLED(CONFIG_QCOM_OCMEM) */64 65#endif /* __OCMEM_H__ */66