This should work. We use similar approach to test our mport HW drivers. Alex.
From: Linuxppc-dev [mailto:linuxppc-dev-bounces+alexandre.bounine=idt....@lists.ozlabs.org] On Behalf Of Saravanan S Sent: Friday, July 13, 2012 2:16 AM To: linuxppc-dev@lists.ozlabs.org Subject: Standalone SRIO Driver for Linux Hi , Iam currently working on the GE make DSP230 board consisting of Quad PowerPC8640 nodes interconnected by SRIO with Linux 2.6.34 . However the only way to access the SRIO is through rionet facility . Our requirement is to use the SRIO interconnect without the Ethernet overheads. This would definitely enable higher speeds (though I cant find any throughput figures for SRIO in Linux on the net ??? ). My query is that whether any attempt has been made to develop a standalone driver and API to access the messaging and doorbell services of SRIO . If no then request you to please provide inputs on the same. From my study I have the following thoughts for the driver : a) Have a character device interface for user . b) Basically use the rio support functions provided in rio.c like rio_add_inb_buffer , rio_add_outb_message to transfer and receive messages and add buffers . c) Maintain a dedicated ring of buffers in the driver and transfer data to and from the buffer to user space . Is this the right direction . Would really appreciate any inputs . thanks in advance. Regards, S.Saravanan
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