函数逻辑报告 |
Source Code:kernel\dma\coherent.c |
Create Date:2022-07-27 11:33:40 |
Last Modify:2020-03-17 14:54:14 | Copyright©Brick |
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函数名称:__dma_alloc_from_coherent
函数原型:static void *__dma_alloc_from_coherent(struct device *dev, struct dma_coherent_mem *mem, ssize_t size, dma_addr_t *dma_handle)
返回类型:void
参数:
类型 | 参数 | 名称 |
---|---|---|
struct device * | dev | |
struct dma_coherent_mem * | mem | |
ssize_t | size | |
dma_addr_t * | dma_handle |
130 | order等于get_order - Determine the allocation order of a memory size*@size: The size for which to get the order* Determine the allocation order of a particular sized block of memory |
135 | spin_lock_irqsave( & spinlock, flags) |
137 | 如果此条件成立可能性小(为编译器优化)(size > (size << PAGE_SHIFT determines the page size ))则转到:err |
141 | 如果此条件成立可能性小(为编译器优化)(pageno < 0)则转到:err |
149 | spin_unlock_irqrestore( & spinlock, flags) |
151 | 返回:ret |
152 | err : |
153 | spin_unlock_irqrestore( & spinlock, flags) |
154 | 返回:NULL |
名称 | 描述 |
---|---|
dma_alloc_from_dev_coherent | dma_alloc_from_dev_coherent() - allocate memory from device coherent pool*@dev: device from which we allocate memory*@size: size of requested memory area*@dma_handle: This will be filled with the correct dma handle*@ret: This pointer will be filled with |
dma_alloc_from_global_coherent |
源代码转换工具 开放的插件接口 | X |
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支持:c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现:逻辑报告 代码生成和批量转换代码 |