On Fri, 2007-05-11 at 13:00 -0700, David Miller wrote: > From: James Bottomley <James.Bottomley@xxxxxxxxxxxx> > Date: Fri, 11 May 2007 13:33:41 -0500 > > > Right at the moment, we're planning to clean up the way SCSI drivers > > process commands. The proposals are essentially: > > > > 1. Get rid of the now unnecessary map_single path (every command is > > either zero transfer or scatter/gather) > > 2. use accessors to manipulate the SG lists (mainly so that we can > > alter the implementation without affecting the drivers) > > > > It strikes me that in all of this, we could also consider doing the DMA > > mapping inside the mid layer (instead of in every driver). This is > > essentially what libata is already doing ... leading to confusion in > > SCSI drivers that use libata for SATA. > > > > So what do people think about this? > > This would require platforms to handle all of their bus types > behind the generic dma_*() and that's isn't true everywhere yet. > > For example, SBUS still requires explicitly using sbus_map_sg() etc. > > I plan to fix that of course, but we're not there now. I could probably cook up a patch for you, if you like? ... I've already done it for several other architectures. James - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
