On 11/16/2009 10:21 AM, Arjan van de Ven wrote:
On Mon, 16 Nov 2009 23:59:39 +0900
Tejun Heo<tj@xxxxxxxxxx> wrote:
Arjan van de Ven wrote:
is there a hardware way to ask for the link status via a link level
thing? I thought the sata_scr_read() was by definition a host thing
sata_scr_read() will do the right thing given the link parameter
although it needs to be called from EH context for PMP links. For
now, just making the functions take @link param and passing it around
should do.
I'm sorry it just does not make sense to me anymore.
if this moves to be a link level thing, then the statistics also need
to be kept link level, and thus exported link level, and I don't think
that exists.
It is already link-level in hardware (ie. in reality), in the sata_scr_*
interface, and in the accounting stats you [quite correctly] added to
struct ata_link in your patch.
The only thing -not- at link level is the userland interface, which
instead uses host-level granularity.
Jeff
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