f9ce4c0c37
Rename our kernel-internal DMA-BUF Heap headers. Remove header define our version of the heap helper buffer, which will not longer be used. Change-Id: Ib1c7f1c00aa922ef81b45f23306e91faab32be92 Signed-off-by: Chris Goldsworthy <cgoldswo@codeaurora.org>
70 lines
2.6 KiB
C
70 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2020, The Linux Foundation. All rights reserved.
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*/
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#ifndef _MSM_DMA_HEAP_H
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#define _MSM_DMA_HEAP_H
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#include <linux/bits.h>
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#include <linux/qcom_dma_heap_names.h>
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#include <linux/err.h>
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/* Heap flags */
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#define MSM_DMA_HEAP_FLAG_CACHED BIT(1)
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#define MSM_DMA_HEAP_FLAG_CP_TRUSTED_VM BIT(15)
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/* Unused */
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#define MSM_DMA_HEAP_FLAG_CP_TOUCH BIT(17)
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#define MSM_DMA_HEAP_FLAG_CP_BITSTREAM BIT(18)
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#define MSM_DMA_HEAP_FLAG_CP_PIXEL BIT(19)
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#define MSM_DMA_HEAP_FLAG_CP_NON_PIXEL BIT(20)
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#define MSM_DMA_HEAP_FLAG_CP_CAMERA BIT(21)
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#define MSM_DMA_HEAP_FLAG_CP_HLOS BIT(22)
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#define MSM_DMA_HEAP_FLAG_CP_SPSS_SP BIT(23)
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#define MSM_DMA_HEAP_FLAG_CP_SPSS_SP_SHARED BIT(24)
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#define MSM_DMA_HEAP_FLAG_CP_SEC_DISPLAY BIT(25)
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#define MSM_DMA_HEAP_FLAG_CP_APP BIT(26)
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#define MSM_DMA_HEAP_FLAG_CP_CAMERA_PREVIEW BIT(27)
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/* Unused */
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#define MSM_DMA_HEAP_FLAG_CP_CDSP BIT(29)
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#define MSM_DMA_HEAP_FLAG_CP_SPSS_HLOS_SHARED BIT(30)
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#define MSM_DMA_HEAP_FLAGS_CP_MASK GENMASK(30, 15)
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/**
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* dma_buf_heap_hyp_assign - wrapper function that hyp-assigns a dma_buf away from HLOS
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* @buf: dma_buf to hyp-assign away from HLOS
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* @dest_vmids: array of MSM_DMA_HEAP_FLAG VMIDs (as defined above)
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* @dest_perms: array of PERM_READ/PERM_WRITE/PERM_EXEC permission bits (as
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* defined in include/soc/qcom/secure_buffer.sh), such that
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* dest_perms[i] specifies the permissions for VMID dest_vmids[i]
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* @dest_nelems: number of elements in dest_vmids and dest_perms
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*
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* Return: Temporarily return -EINVAL whilst the functon isn't present. Otherwise, return
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* 0 on success, or the negative value returned by hyp_assign_table() on failure.
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*/
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static inline int dma_buf_heap_hyp_assign(struct dma_buf *buf, int *dest_vmids, int *dest_perms,
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int dest_nelems)
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{
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return -EINVAL;
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}
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/**
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* dma_buf_heap_hyp_unassign - wrapper function that hyp-assigns a dma_buf back to HLOS
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* @buf: dma_buf to hyp-assign back to HLOS
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*
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* This function takes a dma_buf, and re-assigns it to HLOS with RWX permissions (at the
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* S2 level). The end-points to which the buffer was assigned to are tracked by the flags
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* kept in the msm_heap_helper_buffer->flags field (the helper_buffer is accesed through
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* dma_buf->priv), so the corresponding VMIDs don't need to be supplied as arguments.
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*
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* Return: Temporarily return -EINVAL whilst the functon isn't present. Otherwise, return
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* 0 on success, or the negative value returned by hyp_assign_table() on failure.
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*/
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static inline int dma_buf_heap_hyp_unassign(struct dma_buf *buf)
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{
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return -EINVAL;
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}
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#endif /* _MSM_DMA_HEAP_H */
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