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