lkml.org 
[lkml]   [2006]   [Jun]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v3 1/7] AMSO1100 Low Level Driver.
From
Date

> > > + /* Tell HW to xmit */
> > > + __raw_writeq(cpu_to_be64(mapaddr), elem->hw_desc + C2_TXP_ADDR);
> > > + __raw_writew(cpu_to_be16(maplen), elem->hw_desc + C2_TXP_LEN);
> > > + __raw_writew(cpu_to_be16(TXP_HTXD_READY), elem->hw_desc + C2_TXP_FLAGS);
> >
> > or here
> >
>
> No need here. This logic submits the packet for transmission. We don't
> assume it is transmitted until we (after a completion interrupt usually)
> read back the HTXD entry and see the TXP_HTXD_DONE bit set (see
> c2_tx_interrupt()).

... but will that interrupt happen at all if these 3 writes never hit
the hardware?


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-06-23 16:04    [W:0.078 / U:0.912 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site