Hello Tyler, Thanks for your information. regards Jhoney On Mon, 18 Oct 2004 Tyler wrote : >jhoney jhoney wrote: >>Hello All, >> >>Presently I am working on DMA, I have to DMA the data from PCI HOST to PCI AGENT. I am searching for the template code for allocating dma buffer and receiving the data. I thought of following a network device which uses the DMA the packet to kernel memory and receives an interrupt. >>Could u please tell me the exact code for allocating the space for DMA and calling the appropriate functions handling the whole dma process in 2.4.27 kernel for network devices >> >>Thanks in Advance >> >>Jhoney >Hi, >Buffers DMA have to be on a special memory pool which is init at boot time. >you can then allocate DMA buffers with the normal memory functions (get_page or kmalloc) and with a special flag: __GFP_DMA >kmalloc(size,__GFP_DMA) ; >__get_fre_pages(__GFP_DMA,order) ; > > >-- >Kernelnewbies: Help each other learn about the Linux kernel. >Archive: http://mail.nl.linux.org/kernelnewbies/ >FAQ: http://kernelnewbies.org/faq/ >
