0585fb4452
There is currently no interface for adding/removing memory to an ION heap, so add one. Change-Id: I68061feca3c29cd8f2370665f40f8005fb8765ff Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>
101 lines
2.1 KiB
C
101 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2019-2020, The Linux Foundation. All rights reserved.
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*/
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#ifndef _MSM_ION_H
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#define _MSM_ION_H
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#include <linux/bitmap.h>
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#include <linux/device.h>
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#include <linux/scatterlist.h>
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#include <uapi/linux/msm_ion.h>
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struct ion_prefetch_region {
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u64 size;
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u32 vmid;
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};
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#if IS_ENABLED(CONFIG_ION_MSM_HEAPS)
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struct device *msm_ion_heap_device_by_id(int heap_id);
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static inline unsigned int ion_get_flags_num_vm_elems(unsigned int flags)
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{
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unsigned long vm_flags = flags & ION_FLAGS_CP_MASK;
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return ((unsigned int)bitmap_weight(&vm_flags, BITS_PER_LONG));
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}
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int ion_populate_vm_list(unsigned long flags, unsigned int *vm_list,
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int nelems);
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int msm_ion_heap_prefetch(int heap_id, struct ion_prefetch_region *regions,
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int nr_regions);
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int msm_ion_heap_drain(int heap_id, struct ion_prefetch_region *regions,
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int nr_regions);
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int get_ion_flags(u32 vmid);
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bool msm_ion_heap_is_secure(int heap_id);
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int msm_ion_heap_add_memory(int heap_id, struct sg_table *sgt);
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int msm_ion_heap_remove_memory(int heap_id, struct sg_table *sgt);
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#else
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static inline struct device *msm_ion_heap_device_by_id(int heap_id)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline unsigned int ion_get_flags_num_vm_elems(unsigned int flags)
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{
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return 0;
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}
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static inline int ion_populate_vm_list(unsigned long flags,
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unsigned int *vm_list, int nelems)
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{
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return -EINVAL;
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}
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static inline int msm_ion_heap_prefetch(int heap_id,
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struct ion_prefetch_region *regions,
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int nr_regions)
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{
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return -ENODEV;
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}
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static inline int msm_ion_heap_drain(int heap_id,
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struct ion_prefetch_region *regions,
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int nr_regions)
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{
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return -ENODEV;
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}
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static inline int get_ion_flags(u32 vmid)
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{
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return -EINVAL;
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}
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static inline bool msm_ion_heap_is_secure(int heap_id)
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{
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return false;
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}
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static inline int msm_ion_heap_add_memory(int heap_id, struct sg_table *sgt)
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{
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return -ENODEV;
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}
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static inline int msm_ion_heap_remove_memory(int heap_id, struct sg_table *sgt)
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{
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return -ENODEV;
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}
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#endif /* CONFIG_ION_MSM_HEAPS */
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#endif /* _MSM_ION_H */
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