Am 04.10.2010 22:13, Edward Hoffman wrote: > I am attempting to port the Broadcom tg3 NetXtreme linux driver to > rtnet.
Your port will be welcome! > The Broadcom driver internally utilizes > spin_lock_bh/spin_unlock_bh to disable/enable software interrupts. > There is no rtdm lock equivalent. > I believe that software interrupts are used by the driver for the > following reasons: > 1. To allow for simultaneous DMA read write operations > 2. To use shared local variables in a critical section of the driver. > 3. To receive changes to settings variables in realtime from the > userpace Nextreme utilities. (not sure about this one). > > What RTDM lock functions should I use to substitute for > spin_lock_bh/spin_unlock_bh? Should I substitute > rtdm_lock_get_irqsave/rtdm_lock_put_irqrestore? Or does rtdm need to ne > extended for softirqs used internally by the driver? > > I looked through the other device drivers and could not detect the > correct substitute. As RTDM provides no abstraction of bottom-halves, there are also no specific locking services to disable them. You have to use IRQ-disabling services unless you are in IRQ context. Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux ------------------------------------------------------------------------------ Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb _______________________________________________ RTnet-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/rtnet-developers
