从哪里开始学习Linux DMA/设备驱动程序/内存分配

在线:

Anatomy of the Linux slab allocator

Understanding the Linux Virtual Memory Manager

Linux Device Drivers, Third Edition

The Linux Kernel Module Programming Guide

Writing device drivers in Linux: A brief tutorial

书:

Linux Kernel Development (2nd Edition)

Essential Linux Device Drivers (只有前4-5章)

有用资源:

the Linux Cross Reference (所有内核的可搜索内核源)

API changes in the 2.6 kernel series

dma_sync_single_for_device 电话 dma_sync_single_range_for_cpu 在文件中再向上一点,这是源文档(我假设即使这是用于ARM的,接口和行为也是相同的):

/**
 380 * dma_sync_single_range_for_cpu
 381 * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
 382 * @handle: DMA address of buffer
 383 * @offset: offset of region to start sync
 384 * @size: size of region to sync
 385 * @dir: DMA transfer direction (same as passed to dma_map_single)
 386 *
 387 * Make physical memory consistent for a single streaming mode DMA
 388 * translation after a transfer.
 389 *
 390 * If you perform a dma_map_single() but wish to interrogate the
 391 * buffer using the cpu, yet do not wish to teardown the PCI dma
 392 * mapping, you must call this function before doing so.  At the
 393 * next point you give the PCI dma address back to the card, you
 394 * must first the perform a dma_sync_for_device, and then the
 395 * device again owns the buffer.
 396 */

Understanding The Linux Kernel ?

的章节 Linux Device Drivers book(与理解Linux内核在同一系列中,由@matthew flashen推荐)可能很有用。

您可以从下载独立章节 LWN Website . Chapter 16 处理DMA。