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class="shortdesc">SDMC、SPI NAND、SPI NOR<span class="ph"> 以及文件系统</span> 等存储模块的介绍和使用说明。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="concept_mcc_32s_nbc-d5856e3639" class="topicref" data-id="concept_mcc_32s_nbc" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action concept_mcc_32s_nbc-d5856e3639-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-multi-media-sdk.html" id="concept_mcc_32s_nbc-d5856e3639-link">多媒体</a><div class="wh-tooltip"><p class="shortdesc">GE、VE、Display、DVP、MPP、MPP 播放器等多媒体模块的介绍和使用说明。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="concept_nww_hzh_pzb-d5856e4868" class="topicref" data-id="concept_nww_hzh_pzb" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action concept_nww_hzh_pzb-d5856e4868-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-interface-sdk.html" id="concept_nww_hzh_pzb-d5856e4868-link">接口</a><div class="wh-tooltip"><p class="shortdesc">CAN<span class="ph">、CAP</span>、CIR、GPAI、GPIO、I2C、PSADC、PWM 等接口模块的介绍和使用说明。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-safety-d5856e6083" class="topicref" data-id="chapter-safety" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-safety-d5856e6083-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-safety-sdk.html" id="chapter-safety-d5856e6083-link">安全</a><div class="wh-tooltip"><p class="shortdesc">SPI ENC、CE、eFuse 等安全模块的介绍和使用说明。</p></div></div></div></li></ul></li></ul></div>
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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic concept/concept topic concept" role="article" aria-labelledby="ariaid-title1"><span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/dma/dma-interface-design-lite.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">接口设计</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;">
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Read time: 3 minute(s)
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</div><div class="- topic/body concept/conbody body conbody"><section class="- topic/section section" id="concept_lws_bsf_h1c__section_rhb_syt_mdc" data-ofbid="concept_lws_bsf_h1c__section_rhb_syt_mdc"><h2 class="- topic/title title sectiontitle">Driver 层接口设计</h2>
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<p class="- topic/p p" data-ofbid="d63706e31__20250121171521">以下接口是遵循 Linux DMA Engine 子系统的标准接口。</p>
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<div class="table-container"><table class="- topic/table table frame-all" id="concept_lws_bsf_h1c__table_tqc_33d_bdc" data-ofbid="concept_lws_bsf_h1c__table_tqc_33d_bdc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 1</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">dmaengine_slave_config</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="concept_lws_bsf_h1c__table_tqc_33d_bdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="concept_lws_bsf_h1c__table_tqc_33d_bdc__entry__2">int dmaengine_slave_config(struct dma_chan *chan, struct
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dma_slave_config *config)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_tqc_33d_bdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_tqc_33d_bdc__entry__2">配置指定的 DMA 物理通道</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_tqc_33d_bdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_tqc_33d_bdc__entry__2">
|
||
<div class="- topic/div div">
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||
<div class="- topic/div div">chan - 指向一个 DMA 物理通道</div>
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||
<div class="- topic/div div">config - 保存了需要的配置信息</div>
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||
</div>
|
||
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_tqc_33d_bdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_tqc_33d_bdc__entry__2">0，成功</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="concept_lws_bsf_h1c__table_tqc_33d_bdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_lws_bsf_h1c__table_tqc_33d_bdc__entry__2">-</td></tr></tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="concept_lws_bsf_h1c__table_uqc_33d_bdc" data-ofbid="concept_lws_bsf_h1c__table_uqc_33d_bdc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 2</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">dmaengine_pause</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="concept_lws_bsf_h1c__table_uqc_33d_bdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="concept_lws_bsf_h1c__table_uqc_33d_bdc__entry__2">int dmaengine_pause(struct dma_chan *chan)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_uqc_33d_bdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_uqc_33d_bdc__entry__2">暂停指定通道的传输操作</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_uqc_33d_bdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_uqc_33d_bdc__entry__2">chan - 指向一个 DMA 物理通道</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_uqc_33d_bdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_uqc_33d_bdc__entry__2">0，成功</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="concept_lws_bsf_h1c__table_uqc_33d_bdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_lws_bsf_h1c__table_uqc_33d_bdc__entry__2">-</td></tr></tbody></table></div>
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<div class="table-container"><table class="- topic/table table frame-all" id="concept_lws_bsf_h1c__table_vqc_33d_bdc" data-ofbid="concept_lws_bsf_h1c__table_vqc_33d_bdc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 3</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">dmaengine_resume</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="concept_lws_bsf_h1c__table_vqc_33d_bdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="concept_lws_bsf_h1c__table_vqc_33d_bdc__entry__2">int dmaengine_resume(struct dma_chan *chan)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_vqc_33d_bdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_vqc_33d_bdc__entry__2">恢复指定通道的传输操作</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_vqc_33d_bdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_vqc_33d_bdc__entry__2">chan - 指向一个 DMA 物理通道</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_vqc_33d_bdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_vqc_33d_bdc__entry__2">0，成功</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="concept_lws_bsf_h1c__table_vqc_33d_bdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_lws_bsf_h1c__table_vqc_33d_bdc__entry__2">-</td></tr></tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="concept_lws_bsf_h1c__table_wqc_33d_bdc" data-ofbid="concept_lws_bsf_h1c__table_wqc_33d_bdc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 4</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">dmaengine_prep_dma_memcpy</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="concept_lws_bsf_h1c__table_wqc_33d_bdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="concept_lws_bsf_h1c__table_wqc_33d_bdc__entry__2">
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<div class="- topic/div div">
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||
<div class="- topic/div div">int dmaengine_prep_dma_memcpy(struct dma_chan *chan,</div>
|
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<div class="- topic/div div">uint32_t dest, uint32_t src, uint32_t len)</div>
|
||
</div>
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||
</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_wqc_33d_bdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_wqc_33d_bdc__entry__2">memcpy 操作的预处理</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_wqc_33d_bdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_wqc_33d_bdc__entry__2">
|
||
<div class="- topic/div div">
|
||
<div class="- topic/div div">chan - 指向一个 DMA 物理通道</div>
|
||
<div class="- topic/div div">dest - 目标 Buffer 的物理地址</div>
|
||
<div class="- topic/div div">src - 源 Buffer 的物理地址</div>
|
||
<div class="- topic/div div">len - 数据长度</div>
|
||
</div>
|
||
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_wqc_33d_bdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_wqc_33d_bdc__entry__2">0，成功；<0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="concept_lws_bsf_h1c__table_wqc_33d_bdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_lws_bsf_h1c__table_wqc_33d_bdc__entry__2">-</td></tr></tbody></table></div>
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||
<div class="table-container"><table class="- topic/table table frame-all" id="concept_lws_bsf_h1c__table_xqc_33d_bdc" data-ofbid="concept_lws_bsf_h1c__table_xqc_33d_bdc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 5</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">dmaengine_prep_dma_device</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="concept_lws_bsf_h1c__table_xqc_33d_bdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="concept_lws_bsf_h1c__table_xqc_33d_bdc__entry__2">
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<div class="- topic/div div">
|
||
<div class="- topic/div div">int dmaengine_prep_dma_device(struct dma_chan *chan,</div>
|
||
<div class="- topic/div div">uint32_t dest, uint32_t src, uint32_t len,</div>
|
||
<div class="- topic/div div">enum dma_transfer_direction dir)</div>
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||
</div>
|
||
</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_xqc_33d_bdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_xqc_33d_bdc__entry__2">设备与内存之间传输操作的预处理</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_xqc_33d_bdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_xqc_33d_bdc__entry__2">
|
||
<div class="- topic/div div">
|
||
<div class="- topic/div div">chan - 指向一个 DMA 物理通道</div>
|
||
<div class="- topic/div div">dest - 目标 Buffer 的物理地址</div>
|
||
<div class="- topic/div div">src - 源 Buffer 的物理地址</div>
|
||
<div class="- topic/div div">len - 数据长度</div>
|
||
<div class="- topic/div div">dir - 传输方向，是 Dev to Mem，还是 Mem to Dev</div>
|
||
</div>
|
||
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_xqc_33d_bdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_xqc_33d_bdc__entry__2">0，成功；<0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="concept_lws_bsf_h1c__table_xqc_33d_bdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_lws_bsf_h1c__table_xqc_33d_bdc__entry__2">-</td></tr></tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="concept_lws_bsf_h1c__table_yqc_33d_bdc" data-ofbid="concept_lws_bsf_h1c__table_yqc_33d_bdc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 6</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">dmaengine_prep_dma_cyclic </span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="concept_lws_bsf_h1c__table_yqc_33d_bdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="concept_lws_bsf_h1c__table_yqc_33d_bdc__entry__2">
|
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<div class="- topic/div div">
|
||
<div class="- topic/div div">int dmaengine_prep_dma_cyclic(struct dma_chan *chan,</div>
|
||
<div class="- topic/div div">uint32_t buf_addr, uint32_t buf_len, uint32_t
|
||
period_len,</div>
|
||
<div class="- topic/div div">enum dma_transfer_direction dir)</div>
|
||
</div>
|
||
</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_yqc_33d_bdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_yqc_33d_bdc__entry__2">（设备与内存之间）循环传输操作的预处理</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_yqc_33d_bdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_yqc_33d_bdc__entry__2">
|
||
<div class="- topic/div div">
|
||
<div class="- topic/div div">chan - 指向一个 DMA 物理通道</div>
|
||
<div class="- topic/div div">buf_addr - 循环 Buffer 的起始物理地址</div>
|
||
<div class="- topic/div div">buf_len - 循环 Buffer 的总长度</div>
|
||
<div class="- topic/div div">period_len - 循环的 Buffer 片段长度</div>
|
||
<div class="- topic/div div">dir - 传输方向，是 Dev to Mem，还是 Mem to Dev</div>
|
||
</div>
|
||
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_yqc_33d_bdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_yqc_33d_bdc__entry__2">0，成功；<0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="concept_lws_bsf_h1c__table_yqc_33d_bdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_lws_bsf_h1c__table_yqc_33d_bdc__entry__2">-</td></tr></tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="concept_lws_bsf_h1c__table_zqc_33d_bdc" data-ofbid="concept_lws_bsf_h1c__table_zqc_33d_bdc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 7</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">dma_async_issue_pending </span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="concept_lws_bsf_h1c__table_zqc_33d_bdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="concept_lws_bsf_h1c__table_zqc_33d_bdc__entry__2">void dma_async_issue_pending(struct dma_chan *chan)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_zqc_33d_bdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_zqc_33d_bdc__entry__2">启动指定通道的数据传输</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_zqc_33d_bdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_zqc_33d_bdc__entry__2">chan - 指向一个 DMA 物理通道</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_zqc_33d_bdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_zqc_33d_bdc__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="concept_lws_bsf_h1c__table_zqc_33d_bdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_lws_bsf_h1c__table_zqc_33d_bdc__entry__2">-</td></tr></tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="concept_lws_bsf_h1c__table_arc_33d_bdc" data-ofbid="concept_lws_bsf_h1c__table_arc_33d_bdc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 8</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">dmaengine_terminate_async </span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="concept_lws_bsf_h1c__table_arc_33d_bdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="concept_lws_bsf_h1c__table_arc_33d_bdc__entry__2">int dmaengine_terminate_async(struct dma_chan *chan)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_arc_33d_bdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_arc_33d_bdc__entry__2">终止指定通道的数据传输</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_arc_33d_bdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_arc_33d_bdc__entry__2">chan - 指向一个 DMA 物理通道</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_arc_33d_bdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_arc_33d_bdc__entry__2">0，成功</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="concept_lws_bsf_h1c__table_arc_33d_bdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_lws_bsf_h1c__table_arc_33d_bdc__entry__2">-</td></tr></tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="concept_lws_bsf_h1c__table_brc_33d_bdc" data-ofbid="concept_lws_bsf_h1c__table_brc_33d_bdc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 9</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">dmaengine_tx_status </span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="concept_lws_bsf_h1c__table_brc_33d_bdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="concept_lws_bsf_h1c__table_brc_33d_bdc__entry__2">enum dma_status dmaengine_tx_status(struct dma_chan *chan,
|
||
uint32_t *residue)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_brc_33d_bdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_brc_33d_bdc__entry__2">获取指定通道的传输状态</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_brc_33d_bdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_brc_33d_bdc__entry__2">
|
||
<div class="- topic/div div">
|
||
<div class="- topic/div div">chan - 指向一个 DMA 物理通道</div>
|
||
<div class="- topic/div div">residue - 还没有传输完成的剩余长度，单位：字节</div>
|
||
</div>
|
||
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_brc_33d_bdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_brc_33d_bdc__entry__2">DMA_COMPLETE，传输完成；DMA_IN_PROGRESS，传输中</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="concept_lws_bsf_h1c__table_brc_33d_bdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_lws_bsf_h1c__table_brc_33d_bdc__entry__2">-</td></tr></tbody></table></div>
|
||
</section><section class="- topic/section section" id="concept_lws_bsf_h1c__section_ozs_5yt_mdc" data-ofbid="concept_lws_bsf_h1c__section_ozs_5yt_mdc"><h2 class="- topic/title title sectiontitle">HAL 层接口设计</h2>
|
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||
<div class="- topic/p p" data-ofbid="d63706e448__20250121171521">HAL 层的函数接口声明存放在 <span class="+ topic/ph sw-d/filepath ph filepath">hal_dma.h</span>
|
||
中，主要接口有：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_lws_bsf_h1c__codeblock_omj_rvy_bdc" data-ofbid="concept_lws_bsf_h1c__codeblock_omj_rvy_bdc"><strong class="hl-keyword">int</strong> hal_dma_chan_prep_memset(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan,
|
||
uint32_t p_dest,
|
||
uint32_t value,
|
||
uint32_t len);
|
||
<strong class="hl-keyword">int</strong> hal_dma_chan_prep_memcpy(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan,
|
||
uint32_t p_dest,
|
||
uint32_t p_src,
|
||
uint32_t len);
|
||
<strong class="hl-keyword">int</strong> hal_dma_chan_prep_device(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan,
|
||
uint32_t p_dest,
|
||
uint32_t p_src,
|
||
uint32_t len,
|
||
<strong class="hl-keyword">enum</strong> dma_transfer_direction dir);
|
||
<strong class="hl-keyword">int</strong> hal_dma_chan_prep_cyclic(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan,
|
||
uint32_t p_buf_addr,
|
||
uint32_t buf_len,
|
||
uint32_t period_len,
|
||
<strong class="hl-keyword">enum</strong> dma_transfer_direction dir);
|
||
<strong class="hl-keyword">int</strong> hal_dma_chan_tx_status(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan, uint32_t *left_size);
|
||
<strong class="hl-keyword">int</strong> hal_dma_chan_start(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan);
|
||
<strong class="hl-keyword">int</strong> hal_dma_chan_stop(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan);
|
||
<strong class="hl-keyword">int</strong> hal_dma_chan_pause(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan);
|
||
<strong class="hl-keyword">int</strong> hal_dma_chan_resume(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan);
|
||
<strong class="hl-keyword">int</strong> hal_dma_chan_terminate_all(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan);
|
||
<strong class="hl-keyword">int</strong> hal_dma_chan_register_cb(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan,
|
||
dma_async_callback callback,
|
||
<strong class="hl-keyword">void</strong> *callback_param);
|
||
<strong class="hl-keyword">int</strong> hal_dma_chan_config(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan,
|
||
<strong class="hl-keyword">struct</strong> dma_slave_config *config);
|
||
<strong class="hl-keyword">int</strong> hal_release_dma_chan(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan);
|
||
<strong class="hl-keyword">struct</strong> aic_dma_chan * hal_request_dma_chan(<strong class="hl-keyword">void</strong>);
|
||
<strong class="hl-keyword">int</strong> hal_dma_init(<strong class="hl-keyword">void</strong>);
|
||
<strong class="hl-keyword">int</strong> hal_dma_deinit(<strong class="hl-keyword">void</strong>);
|
||
<strong class="hl-keyword">int</strong> hal_dma_chan_dump(<strong class="hl-keyword">int</strong> ch_nr);
|
||
|
||
irqreturn_t hal_dma_irq(<strong class="hl-keyword">int</strong> irq, <strong class="hl-keyword">void</strong> *arg);</pre></div>
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</section></div></article></main></div>
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<div class=" wh_topic_toc "><div class="wh_topic_label">在本页上</div><ul><li class="section-item"><div class="section-title"><a href="#concept_lws_bsf_h1c__section_rhb_syt_mdc" data-tocid="concept_lws_bsf_h1c__section_rhb_syt_mdc">Driver 层接口设计</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_lws_bsf_h1c__section_ozs_5yt_mdc" data-tocid="concept_lws_bsf_h1c__section_ozs_5yt_mdc">HAL 层接口设计</a></div></li></ul></div>
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