4eddc1b416
Allow the ION heaps to implement the prefetch and drain operations. This allows clients to prefetch memory to be able to reserve memory for fast ION allocations at a later point in time, as well as unreserve the memory. Change-Id: I144a4bc45b8b4f28974734d2aa37692db8e169a1 Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>
72 lines
1.5 KiB
C
72 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (c) 2019, The Linux Foundation. All rights reserved.
|
|
*/
|
|
|
|
#ifndef _MSM_ION_H
|
|
#define _MSM_ION_H
|
|
|
|
#include <linux/bitmap.h>
|
|
#include <linux/device.h>
|
|
#include <uapi/linux/msm_ion.h>
|
|
|
|
struct ion_prefetch_region {
|
|
u64 size;
|
|
u32 vmid;
|
|
};
|
|
|
|
#if IS_ENABLED(CONFIG_ION_MSM_HEAPS)
|
|
|
|
struct device *msm_ion_heap_device_by_id(int heap_id);
|
|
|
|
static inline unsigned int ion_get_flags_num_vm_elems(unsigned int flags)
|
|
{
|
|
unsigned long vm_flags = flags & ION_FLAGS_CP_MASK;
|
|
|
|
return ((unsigned int)bitmap_weight(&vm_flags, BITS_PER_LONG));
|
|
}
|
|
|
|
int ion_populate_vm_list(unsigned long flags, unsigned int *vm_list,
|
|
int nelems);
|
|
|
|
int msm_ion_heap_prefetch(int heap_id, struct ion_prefetch_region *regions,
|
|
int nr_regions);
|
|
|
|
int msm_ion_heap_drain(int heap_id, struct ion_prefetch_region *regions,
|
|
int nr_regions);
|
|
|
|
#else
|
|
|
|
static inline struct device *msm_ion_heap_device_by_id(int heap_id)
|
|
{
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
static inline unsigned int ion_get_flags_num_vm_elems(unsigned int flags)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int ion_populate_vm_list(unsigned long flags,
|
|
unsigned int *vm_list, int nelems)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int msm_ion_heap_prefetch(int heap_id,
|
|
struct ion_prefetch_region *regions,
|
|
int nr_regions)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline int msm_ion_heap_drain(int heap_id,
|
|
struct ion_prefetch_region *regions,
|
|
int nr_regions)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
#endif /* CONFIG_ION_MSM_HEAPS */
|
|
#endif /* _MSM_ION_H */
|