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libata: export host controller number thru /sys 

As low-level drivers register their host controller(s), keep track
of the number of controllers and export thru /sys in a <host.port>
format so that udev can better match up port numbers with a
specific controller.

# pwd
/sys/devices/pci0000:00
# find . -name 'ata*' -print

(2nd controller with port multiplier attached)

./0000:00:1e.0/0000:05:01.0/ata2.7
./0000:00:1e.0/0000:05:01.0/ata2.7/link7/dev7.0/ata_device
./0000:00:1e.0/0000:05:01.0/ata2.7/link7/ata_link
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.0/dev7.0.0/ata_device
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.0/ata_link
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.1/dev7.1.0/ata_device
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.1/ata_link
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.2/dev7.2.0/ata_device
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.2/ata_link
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.3/dev7.3.0/ata_device
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.3/ata_link
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.4/dev7.4.0/ata_device
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.4/ata_link
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.5/dev7.5.0/ata_device
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.5/ata_link
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.6/dev7.6.0/ata_device
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.6/ata_link
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.7/dev7.7.0/ata_device
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.7/ata_link
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.8/dev7.8.0/ata_device
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.8/ata_link
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.9/dev7.9.0/ata_device
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.9/ata_link
./0000:00:1e.0/0000:05:01.0/ata2.7/ata_port
./0000:00:1e.0/0000:05:01.0/ata2.7/ata_port/ata2.7
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.10/dev7.10.0/ata_device
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.10/ata_link
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.11/dev7.11.0/ata_device
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.11/ata_link
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.12/dev7.12.0/ata_device
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.12/ata_link
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.13/dev7.13.0/ata_device
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.13/ata_link
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.14/dev7.14.0/ata_device
./0000:00:1e.0/0000:05:01.0/ata2.7/link7.14/ata_link
./0000:00:1e.0/0000:05:01.0/ata2.8
./0000:00:1e.0/0000:05:01.0/ata2.8/link8/dev8.0/ata_device
./0000:00:1e.0/0000:05:01.0/ata2.8/link8/ata_link
./0000:00:1e.0/0000:05:01.0/ata2.8/ata_port
./0000:00:1e.0/0000:05:01.0/ata2.8/ata_port/ata2.8

(1st controller)

./0000:00:1f.2/ata1.1
./0000:00:1f.2/ata1.1/link1/dev1.0/ata_device
./0000:00:1f.2/ata1.1/link1/ata_link
./0000:00:1f.2/ata1.1/ata_port
./0000:00:1f.2/ata1.1/ata_port/ata1.1
./0000:00:1f.2/ata1.2
./0000:00:1f.2/ata1.2/link2/dev2.0/ata_device
./0000:00:1f.2/ata1.2/link2/ata_link
./0000:00:1f.2/ata1.2/ata_port
./0000:00:1f.2/ata1.2/ata_port/ata1.2
./0000:00:1f.2/ata1.3
./0000:00:1f.2/ata1.3/link3/dev3.0/ata_device
./0000:00:1f.2/ata1.3/link3/ata_link
./0000:00:1f.2/ata1.3/ata_port
./0000:00:1f.2/ata1.3/ata_port/ata1.3
./0000:00:1f.2/ata1.4
./0000:00:1f.2/ata1.4/link4/dev4.0/ata_device
./0000:00:1f.2/ata1.4/link4/ata_link
./0000:00:1f.2/ata1.4/ata_port
./0000:00:1f.2/ata1.4/ata_port/ata1.4
./0000:00:1f.2/ata1.5
./0000:00:1f.2/ata1.5/link5/dev5.0/ata_device
./0000:00:1f.2/ata1.5/link5/ata_link
./0000:00:1f.2/ata1.5/ata_port
./0000:00:1f.2/ata1.5/ata_port/ata1.5
./0000:00:1f.2/ata1.6
./0000:00:1f.2/ata1.6/link6/dev6.0/ata_device
./0000:00:1f.2/ata1.6/link6/ata_link
./0000:00:1f.2/ata1.6/ata_port
./0000:00:1f.2/ata1.6/ata_port/ata1.6

Signed-off-by: David Milburn <dmilburn@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
David Milburn 2013-01-14 09:59:30 -06:00 committed by Jeff Garzik
parent 25effc3647
commit 1757d902b0
3 changed files with 6 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/ata/libata-core.c
View File

@ -99,6 +99,7 @@ static void ata_dev_xfermask(struct ata_device *dev);
static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
atomic_t ata_print_id = ATOMIC_INIT(0);
atomic_t host_print_id = ATOMIC_INIT(0);
struct ata_force_param {
const char *name;
@ -6097,6 +6098,9 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
for (i = host->n_ports; host->ports[i]; i++)
kfree(host->ports[i]);
/* track host controller */
host->host_id = atomic_inc_return(&host_print_id);
/* give ports names and add SCSI hosts */
for (i = 0; i < host->n_ports; i++)
host->ports[i]->print_id = atomic_inc_return(&ata_print_id);

2
drivers/ata/libata-transport.c
View File

@ -284,7 +284,7 @@ int ata_tport_add(struct device *parent,
dev->parent = get_device(parent);
dev->release = ata_tport_release;
dev_set_name(dev, "ata%d", ap->print_id);
dev_set_name(dev, "ata%d.%d", ap->host->host_id, ap->print_id);
transport_setup_device(dev);
error = device_add(dev);
if (error) {

1
include/linux/libata.h
View File

@ -546,6 +546,7 @@ struct ata_host {
void *private_data;
struct ata_port_operations *ops;
unsigned long flags;
unsigned int host_id; /* user visible host ID */
struct mutex eh_mutex;
struct task_struct *eh_owner;