| 1 |
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| 2 | |
| 3 | * The On Chip Memory (OCMEM) allocator allows various clients to allocate
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| 4 | * memory from OCMEM based on performance, latency and power requirements.
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| 5 | * This is typically used by the GPU, camera/video, and audio components on
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| 6 | * some Snapdragon SoCs.
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| 7 | *
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| 8 | * Copyright (C) 2019 Brian Masney <[email protected]>
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| 9 | * Copyright (C) 2015 Red Hat. Author: Rob Clark <[email protected]>
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| 10 |
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| 11 |
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| 12 | #include <linux/device.h>
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| 13 | #include <linux/err.h>
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| 14 |
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| 15 | #ifndef __OCMEM_H__
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| 16 | #define __OCMEM_H__
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| 17 |
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| 18 | enum ocmem_client {
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| 19 |
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| 20 | OCMEM_GRAPHICS = 0x0,
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| 21 | |
| 22 | * TODO add more once ocmem_allocate() is clever enough to
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| 23 | * deal with multiple clients.
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| 24 |
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| 25 | OCMEM_CLIENT_MAX,
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| 26 | };
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| 27 |
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| 28 | struct ocmem;
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| 29 |
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| 30 | struct ocmem_buf {
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| 31 | unsigned long offset;
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| 32 | unsigned long addr;
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| 33 | unsigned long len;
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| 34 | };
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| 35 |
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| 36 | #if IS_ENABLED(CONFIG_QCOM_OCMEM)
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| 37 |
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| 38 | struct ocmem *of_get_ocmem(struct device *dev);
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| 39 | struct ocmem_buf *ocmem_allocate(struct ocmem *ocmem, enum ocmem_client client,
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| 40 | unsigned long size);
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| 41 | void ocmem_free(struct ocmem *ocmem, enum ocmem_client client,
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| 42 | struct ocmem_buf *buf);
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| 43 |
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| 44 | #else
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| 45 |
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| 46 | static inline struct ocmem *of_get_ocmem(struct device *dev)
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| 47 | {
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| 48 | return ERR_PTR(-ENODEV);
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| 49 | }
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| 50 |
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| 51 | static inline struct ocmem_buf *ocmem_allocate(struct ocmem *ocmem,
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| 52 | enum ocmem_client client,
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| 53 | unsigned long size)
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| 54 | {
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| 55 | return ERR_PTR(-ENODEV);
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| 56 | }
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| 57 |
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| 58 | static inline void ocmem_free(struct ocmem *ocmem, enum ocmem_client client,
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| 59 | struct ocmem_buf *buf)
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| 60 | {
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| 61 | }
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| 62 |
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| 63 | #endif
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| 64 |
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| 65 | #endif
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