Re: [PATCH v11 17/17]add two new ioctls for mp device.

Ben Hutchings
2010-09-27T21:36:15Z

On Sat, 2010-09-25 at 12:27 +0800, xiaohui.xin@intel.com wrote:
> From: Xin Xiaohui <xiaohui.xin@intel.com>
>
> The patch add two ioctls for mp device.
> One is for userspace to query how much memory locked to make mp device
> run smoothly. Another one is for userspace to set how much meory locked
> it really wants.
[...]
> diff --git a/include/linux/mpassthru.h b/include/linux/mpassthru.h
> index ba8f320..083e9f7 100644
> --- a/include/linux/mpassthru.h
> +++ b/include/linux/mpassthru.h
> @@ -7,6 +7,8 @@
> /* ioctl defines */
> #define MPASSTHRU_BINDDEV _IOW('M', 213, int)
> #define MPASSTHRU_UNBINDDEV _IO('M', 214)
> +#define MPASSTHRU_SET_MEM_LOCKED _IOW('M', 215, unsigned long)
> +#define MPASSTHRU_GET_MEM_LOCKED_NEED _IOR('M', 216, unsigned long)
[...]

These will need compat handling. You can avoid that by defining them to
use a parameter type of u32 or u64.

Ben.

--
Ben Hutchings, Senior Software Engineer, Solarflare Communications
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