dma_sync_single_for_device
Yes. You can lookup in here in this KernelTLV presentation (slide 13). There's an explanation there regarding buffer responsibility., 为了避免高速缓存一致性问题，驱动程序在开始从RAM到设备的DMA数据传输之前，如果有必要，应该调用dma_sync_single_for_device()函数刷新 ..., A call to dma_sync_single_for_device() is required to allow the device to access the buffer again. The other synchronization functions (for ...,Defined in 2 files: include/linux/dma-mapping.h, line 393 (as a function) · include/linux/dma-mapping.h, line 503 (as a function) ... ,Defined in 20 files: arch/arc/include/asm/dma-mapping.h, line 155 (as a function) · arch/avr32/include/asm/dma-mapping.h, line 275 (as a function) ... ,Defined in 22 files: arch/arm/include/asm/dma-mapping.h, line 454 (as a function) · arch/avr32/include/asm/dma-mapping.h, line 275 (as a function) ... ,... actually giving the buffer to the hardware call either:: dma_sync_single_for_device(dev, dma_handle, size, direction); or:: dma_sync_sg_for_device(dev, sglist, ... ,void dma_sync_single_for_device(struct device *dev,dma_handle_t bus_addr, size_t size,enum dma_data_direction direction); 單頁流式映射 ---------- 有時候，要 ... ,void dma_sync_single_for_device(struct device *dev, dma_handle_t ... 呼叫了 void dma_sync_single_for_device() 函式之後，CPU就不應該碰觸DMA 緩衝區了。 ,最近板主一直被老闆叫去弄[norflash driver ]我們的os 是linux 的. 當file system 去call 到norflash read/write/erase 的時候, (我們的ip 是用PIO 模式不是用DMA 模式去 ...
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 dma_sync_single_for_device 相關參考資料
Questions about dma_sync_single_for_cpu ...
Yes. You can lookup in here in this KernelTLV presentation (slide 13). There's an explanation there regarding buffer responsibility. https://stackoverflow.com 蜕变成蝶~Linux设备驱动之DMA - 技术让梦想更伟大- 博客园
为了避免高速缓存一致性问题，驱动程序在开始从RAM到设备的DMA数据传输之前，如果有必要，应该调用dma_sync_single_for_device()函数刷新 ... https://www.cnblogs.com The DMA API changes [LWN.net]
A call to dma_sync_single_for_device() is required to allow the device to access the buffer again. The other synchronization functions (for ... https://lwn.net Linux source code: dma_sync_single_for_device identifier (v5 ...
Defined in 2 files: include/linux/dma-mapping.h, line 393 (as a function) · include/linux/dma-mapping.h, line 503 (as a function) ... https://elixir.bootlin.com Linux source code: dma_sync_single_for_device identifier (v4 ...
Defined in 20 files: arch/arc/include/asm/dma-mapping.h, line 155 (as a function) · arch/avr32/include/asm/dma-mapping.h, line 275 (as a function) ... https://elixir.bootlin.com Linux source code: dma_sync_single_for_device identifier (v3 ...
Defined in 22 files: arch/arm/include/asm/dma-mapping.h, line 454 (as a function) · arch/avr32/include/asm/dma-mapping.h, line 275 (as a function) ... https://elixir.bootlin.com DMA API documentation - The Linux Kernel Archives
... actually giving the buffer to the hardware call either:: dma_sync_single_for_device(dev, dma_handle, size, direction); or:: dma_sync_sg_for_device(dev, sglist, ... https://www.kernel.org 核心記憶體@ Welkin小窩:: 痞客邦::
void dma_sync_single_for_device(struct device *dev,dma_handle_t bus_addr, size_t size,enum dma_data_direction direction); 單頁流式映射 ---------- 有時候，要 ... https://welkinchen.pixnet.net MMAP與DMA
void dma_sync_single_for_device(struct device *dev, dma_handle_t ... 呼叫了 void dma_sync_single_for_device() 函式之後，CPU就不應該碰觸DMA 緩衝區了。 http://ant.comm.ccu.edu.tw 內存映射與DMA筆記@ 程式專欄:: 隨意窩Xuite日誌
最近板主一直被老闆叫去弄[norflash driver ]我們的os 是linux 的. 當file system 去call 到norflash read/write/erase 的時候, (我們的ip 是用PIO 模式不是用DMA 模式去 ... https://blog.xuite.net |