函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\dma\swiotlb.c Create Date:2022-07-27 11:35:54
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：swiotlb_exit

函数原型：void __init swiotlb_exit(void)

返回类型：void

参数：无

384  如果非io_tlb_orig_addr则返回
387  如果late_alloc则
388  free_pages((unsignedlong)io_tlb_orig_addr, 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)
390  free_pages((unsignedlong)This is a free list describing the number of free entries available from* each index, 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)
392  free_pages((unsignedlong)phys_to_virt - map physical address to virtual*@address: address to remap* The returned virtual address is a current CPU mapping for* the memory address given. It is only valid to use this function on* addresses that have a kernel mapping, 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)
394  否则
395  memblock_free_late(__pa(io_tlb_orig_addr), align the pointer to the (next) page boundary (The number of IO TLB blocks (in groups of 64) between io_tlb_start and* io_tlb_end. This is command line adjustable via setup_io_tlb_npages. * sizeof(phys_addr_t)))
397  memblock_free_late(__pa(This is a free list describing the number of free entries available from* each index), align the pointer to the (next) page boundary (The number of IO TLB blocks (in groups of 64) between io_tlb_start and* io_tlb_end. This is command line adjustable via setup_io_tlb_npages. * sizeof(int)))
399  memblock_free_late(Used to do a quick range check in swiotlb_tbl_unmap_single and* swiotlb_tbl_sync_single_*, to see if the memory was in fact allocated by this* API., align the pointer to the (next) page boundary (The number of IO TLB blocks (in groups of 64) between io_tlb_start and* io_tlb_end. This is command line adjustable via setup_io_tlb_npages. << log of the size of each IO TLB slab. The number of slabs is command line* controllable.))
402  swiotlb_cleanup()