lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

libata-link: add PMP links

Browse Source 
Add link->pmp, ap->nr_pmp_links, ap->pmp_link[], and implement/update
link helpers.

printk helpers are updated such that port and link are identifed as
'ataP:' if no PMP is attached, while device is identified as
'ataP.DD:'.  If PMP is attached, they become 'ataP:', 'ataP.LL:' and
'ataP.LL' - ie. link and device are identified their PMP number.

If PPM is attached (ap->nr_pmp_links != 0), ata_for_each_link()
iterates over PMP links, while __ata_for_each_link() iterates over the
host link + PMP links.  If PMP is not attached (ap->nr_pmp_links ==
0), both iterate over only the host link.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo
2007-08-06 18:36:23 +09:00
committed by Jeff Garzik
parent dbd826168d
commit 8989805d6d
2 changed files with 51 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/ata/libata-core.c
View File

@@ -6064,13 +6064,14 @@ void ata_dev_init(struct ata_device *dev)
* ata_link_init - Initialize an ata_link structure
* @ap: ATA port link is attached to
* @link: Link structure to initialize
* @pmp: Port multiplier port number
*
* Initialize @link.
*
* LOCKING:
* Kernel thread context (may sleep)
*/
static void ata_link_init(struct ata_port *ap, struct ata_link *link)
static void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
{
int i;
@@ -6078,6 +6079,7 @@ static void ata_link_init(struct ata_port *ap, struct ata_link *link)
memset(link, 0, offsetof(struct ata_link, device[0]));
link->ap = ap;
link->pmp = pmp;
link->active_tag = ATA_TAG_POISON;
link->hw_sata_spd_limit = UINT_MAX;
@@ -6173,7 +6175,7 @@ struct ata_port *ata_port_alloc(struct ata_host *host)
ap->cbl = ATA_CBL_NONE;
ata_link_init(ap, &ap->link);
ata_link_init(ap, &ap->link, 0);
#ifdef ATA_IRQ_TRAP
ap->stats.unhandled_irq = 1;