dma_alloc_coherent kmalloc
So as mentioned that dma_alloc_coherent for coherent arm architecture doesn't change any page .... dma_alloc_coherent or via kmalloc.,Any address returned by kmalloc(), vmalloc(), and similar interfaces is a ..... you should do:: dma_addr_t dma_handle; cpu_addr = dma_alloc_coherent(dev, size ... , dma_alloc_coherent() returns address range for which proper memory attributes are already set so cache effect is handled naturally. We need ..., A DMA driver can use dma_alloc_coherent() to allocate DMA-able space in this case to guarantee that the DMA region is uncacheable. As this ..., 获得连续物理内存的方法有很多，在很多地方搜了但是自己拿过来用就是用不了，这里展示几个亲测能用的。包括dma_alloc_coherent和kmalloc等。, 难道是因为用dma_alloc_coherent申请的这块内存的属性是禁止cache的，而使用kmalloc申请的没有禁止cache吗? 想问下有没有办法能加快访问 ..., But since kmalloc does not allocate non caceable memory then is it not possible that ... Wouldnt using dma_alloc_coherent be a better idea?, kmalloc是核心中最常用的一種記憶體分配方式，它通過呼叫kmem_cache_alloc ... dma_alloc_coherent和__get_free_pages函數實現差別不大。,DMA_NONE = 3, }; 以上的kernel API主要是針對將一般取得的記憶體(例如由kmalloc所取得)，是會被cache的記憶體。 將cache中的資料和實體記憶體資料做同步的 ...
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 dma_alloc_coherent kmalloc 相關參考資料
ARM Dma-mapping Explained | Linux Kernel Hacking
So as mentioned that dma_alloc_coherent for coherent arm architecture doesn't change any page .... dma_alloc_coherent or via kmalloc. http://linuxkernelhacker.blogs DMA API - Kernel.org
Any address returned by kmalloc(), vmalloc(), and similar interfaces is a ..... you should do:: dma_addr_t dma_handle; cpu_addr = dma_alloc_coherent(dev, size ... https://www.kernel.org GFP_KERNEL vs GFP_DMA and kmalloc() vs dma_alloc_coherent ...
dma_alloc_coherent() returns address range for which proper memory attributes are already set so cache effect is handled naturally. We need ... https://stackoverflow.com Is a buffer within kmalloc also a DMA safe buffer? - Stack Overflow
A DMA driver can use dma_alloc_coherent() to allocate DMA-able space in this case to guarantee that the DMA region is uncacheable. As this ... https://stackoverflow.com Kernel 4.9 上dma_alloc_coherent() 函数开辟DMA 连续 ... - Csdn博客
获得连续物理内存的方法有很多，在很多地方搜了但是自己拿过来用就是用不了，这里展示几个亲测能用的。包括dma_alloc_coherent和kmalloc等。 https://blog.csdn.net linux中关于dma_alloc_coherent的用法- 强强的专栏- CSDN博客
难道是因为用dma_alloc_coherent申请的这块内存的属性是禁止cache的，而使用kmalloc申请的没有禁止cache吗? 想问下有没有办法能加快访问 ... https://blog.csdn.net use of kmalloc for dma memories - Linux forum (Read-Only) - Linux ...
But since kmalloc does not allocate non caceable memory then is it not possible that ... Wouldnt using dma_alloc_coherent be a better idea? https://e2e.ti.com 常用核心記憶體分配函數@ Welkin小窩:: 痞客邦::
kmalloc是核心中最常用的一種記憶體分配方式，它通過呼叫kmem_cache_alloc ... dma_alloc_coherent和__get_free_pages函數實現差別不大。 http://welkinchen.pixnet.net 驅動程式中的DMA問題@ Welkin小窩:: 痞客邦::
DMA_NONE = 3, }; 以上的kernel API主要是針對將一般取得的記憶體(例如由kmalloc所取得)，是會被cache的記憶體。 將cache中的資料和實體記憶體資料做同步的 ... http://welkinchen.pixnet.net |