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https://github.com/nyanmisaka/mpp.git
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e15972e9af
sync_begin - cache invalidate, should be called before cpu read sync_end - cache flush, should be called after cpu write MppBuffer sync flow: 1. hw access 2. sync_begin 3. cpu access (read / write) 4. sync_end 5. hw access NOTE: readonly option is faster for read only buffer. Signed-off-by: xueman.ruan <xueman.ruan@rock-chips.com> Signed-off-by: Herman Chen <herman.chen@rock-chips.com> Change-Id: I253a6139e9bb30808c07075d64f17b5cfad8519a
127 lines
3.3 KiB
C++
127 lines
3.3 KiB
C++
/* SPDX-License-Identifier: Apache-2.0 OR MIT */
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/*
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* Copyright (c) 2023 Rockchip Electronics Co., Ltd.
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*/
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#include <string.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <linux/dma-buf.h>
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#include "mpp_log.h"
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#include "mpp_dmabuf.h"
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/* SET_NAME and SYNC_PARTIAL are supported after 4.4 kernel */
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/* Add dma buffer name uapi */
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#ifndef DMA_BUF_SET_NAME
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/* 32/64bitness of this uapi was botched in android, there's no difference
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* between them in actual uapi, they're just different numbers.
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*/
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#define DMA_BUF_SET_NAME _IOW(DMA_BUF_BASE, 1, const char *)
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#define DMA_BUF_SET_NAME_A _IOW(DMA_BUF_BASE, 1, __u32)
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#define DMA_BUF_SET_NAME_B _IOW(DMA_BUF_BASE, 1, __u64)
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#endif
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/* Add dma buffer sync partial uapi */
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#ifndef DMA_BUF_IOCTL_SYNC_PARTIAL
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struct dma_buf_sync_partial {
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__u64 flags;
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__u32 offset;
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__u32 len;
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};
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#define DMA_BUF_IOCTL_SYNC_PARTIAL _IOW(DMA_BUF_BASE, 2, struct dma_buf_sync_partial)
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#endif
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#define MPP_NO_PARTIAL_SUPPORT 25 /* ENOTTY */
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static RK_U32 has_partial_ops = 1;
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MPP_RET mpp_dmabuf_sync_begin(RK_S32 fd, RK_S32 ro, const char *caller)
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{
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struct dma_buf_sync sync;
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RK_S32 ret;
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sync.flags = DMA_BUF_SYNC_START | (ro ? DMA_BUF_SYNC_READ : DMA_BUF_SYNC_RW);
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ret = ioctl(fd, DMA_BUF_IOCTL_SYNC, &sync);
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if (ret) {
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mpp_err_f("ioctl failed for %s from %s\n", strerror(errno), caller);
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return MPP_NOK;
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}
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return MPP_OK;
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}
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MPP_RET mpp_dmabuf_sync_end(RK_S32 fd, RK_S32 ro, const char *caller)
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{
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struct dma_buf_sync sync;
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RK_S32 ret;
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sync.flags = DMA_BUF_SYNC_END | (ro ? DMA_BUF_SYNC_READ : DMA_BUF_SYNC_RW);
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ret = ioctl(fd, DMA_BUF_IOCTL_SYNC, &sync);
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if (ret) {
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mpp_err_f("ioctl failed for %s from %s\n", strerror(errno), caller);
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return MPP_NOK;
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}
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return MPP_OK;
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}
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MPP_RET mpp_dmabuf_sync_partial_begin(RK_S32 fd, RK_S32 ro, RK_U32 offset, RK_U32 length, const char *caller)
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{
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if (has_partial_ops) {
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struct dma_buf_sync_partial sync;
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RK_S32 ret;
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sync.flags = DMA_BUF_SYNC_START | (ro ? DMA_BUF_SYNC_READ : DMA_BUF_SYNC_RW);
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sync.offset = offset;
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sync.len = length;
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ret = ioctl(fd, DMA_BUF_IOCTL_SYNC_PARTIAL, &sync);
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if (ret) {
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if (errno == MPP_NO_PARTIAL_SUPPORT) {
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has_partial_ops = 0;
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goto NOT_SUPPORT;
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}
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mpp_err_f("ioctl failed for %s from %s\n", strerror(errno), caller);
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return MPP_NOK;
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}
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return MPP_OK;
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}
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NOT_SUPPORT:
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return mpp_dmabuf_sync_begin(fd, ro, caller);
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}
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MPP_RET mpp_dmabuf_sync_partial_end(RK_S32 fd, RK_S32 ro, RK_U32 offset, RK_U32 length, const char *caller)
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{
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if (has_partial_ops) {
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struct dma_buf_sync_partial sync;
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RK_S32 ret;
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sync.flags = DMA_BUF_SYNC_END | (ro ? DMA_BUF_SYNC_READ : DMA_BUF_SYNC_RW);
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sync.offset = offset;
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sync.len = length;
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ret = ioctl(fd, DMA_BUF_IOCTL_SYNC_PARTIAL, &sync);
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if (ret) {
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if (errno == MPP_NO_PARTIAL_SUPPORT) {
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has_partial_ops = 0;
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goto NOT_SUPPORT;
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}
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mpp_err_f("ioctl failed for %s from %s\n", strerror(errno), caller);
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return MPP_NOK;
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}
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return MPP_OK;
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}
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NOT_SUPPORT:
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return mpp_dmabuf_sync_end(fd, ro, caller);
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} |