gralloc是Android中负责申请和释放GraphicBuffer的HAL层模块,其底层也是通过ION实现。(这里不纠结平台的ION是否已经被DMA-Buf Heaps替换,为了统一叫法,我们假设当前平台还是通过ION实现camera内存管理) 什么情况下camera的buffer需要从gralloc分配,而不能从dam-buf heaps分配? 若Camera写入的Buffer最终被下图这些Consumer使用,...
* dma_heap_add - adds a heap to dmabuf heaps * @exp_info: information needed to register this heap */ struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info) { struct dma_heap *heap, *h, *err_ret; 21 changes: 1 addition & 20 deletions 21 include/linux/dma...
This patch adds a simple shrinker controlled page pool to the dmabuf heaps subsystem. This replaces the use of the networking page_pool, over concerns that the lack of a shrinker for that implementation may cause additional low-memory kills TODO: Take another pass at trying to unify this w...
dmabufheapsmem found (gst-launch-1.0:889): GStreamer-CRITICAL **: 06:27:14.679: gst_buffer_pool_config_set_allocator: assertion 'allocator != NULL || params != NULL' failed 0:00:00.077851750 889 0xffff88000b70 WARN dmabufheapsmemory gstdmabufheaps.c:119:gst_dmabufheaps_allocator_obtain...
DMA-BUF Heaps Linux user-space device buffer allocation and its uses ion : Generic buffer sharing for multiple device pipelines Trying to replace per SoC/GPU custom buffer sharing implementations...
drivers/dma-buf/dma-heap.c# 实现dma-heap的框架drivers/dma-buf/heaps/cma_heap.c# 管理从cma申请的内存drivers/dma-buf/heaps/system_heap.c# 管理从system申请的内存 dam-heap.c是一个抽象的接口层,为具体的heap(cma/system)提供注册机制,创建字符设备节点 ...
但是ION在staging过程中受阻 ,最终upstream放弃了合入ION,而由John Stultz主领,在同样的dma-buf机制上,做了一个叫DMA-BUF Heaps的东西来替代ION。安卓社区也列了相应计划从ION迁移到DMA-BUF Heaps:LVC21-120 Moving to DMA BUF Heaps Now is the time!,从dma-buf往上,ION也好,dma-buf heaps也罢,这一整套...
[PATCH 1/5] kselftests: dmabuf-heaps: Fix Makefile's inclusion... John Stultz [PATCH 2/5] kselftests: dmabuf-heaps: Add clearer checks ... John Stultz [PATCH 3/5] kselftests: dmabuf-heaps: Softly fail if don'... John Stultz [PATCH 4/5] kselftests: dmabuf-heaps: Cleanup ...
《[$] DMA-BUF cache handling: Off the DMA API map (part 1)》Recently, the DMA-BUF heaps interface was added to the 5.6 kernel. This interface is similar to ION, which has been used for years by Android ... O网页链接 文章来源:『 LWN.net | 关注Linux与开源社区 』 ...
and cameras are some of the hardware blocks that may have special memory requirements. ION presents its memory pools as ION heaps. Each type of Android device can be provisioned with a different set of ION heaps according to the memory requirements of the device. The provider of an ION heap...