linux-toradex.git/drivers/ata/libata-transport.c, branch v4.0.7

libata: Implement ATA_DEV_ZAC

2014-11-05T16:22:06+00:00

Add new ATA device type for ZAC devices.

Acked-by: Christoph Hellwig 
Acked-by: Tejun Heo 
Signed-off-by: Hannes Reinecke 
Signed-off-by: Tejun Heo

libata: Fix display of sata speed

2013-10-27T11:43:25+00:00

6.0 Gbps link speed was not decoded properly:
speed was reported at 3.0 Gbps only.

Tested: On a machine where libata reports 6.0 Gbps in
        /var/log/messages:
    ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)

    Before:
    	cat /sys/class/ata_link/link1/sata_spd
    	3.0 Gbps
    After:
    	cat /sys/class/ata_link/link1/sata_spd
    	6.0 Gbps

Signed-off-by: Gwendal Grignou 
Signed-off-by: Tejun Heo 
Cc: stable@vger.kernel.org

ata: acpi: rework the ata acpi bind support

2013-08-23T16:09:23+00:00

Binding ACPI handle to SCSI device has several drawbacks, namely:
1 During ATA device initialization time, ACPI handle will be needed
  while SCSI devices are not created yet. So each time ACPI handle is
  needed, instead of retrieving the handle by ACPI_HANDLE macro,
  a namespace scan is performed to find the handle for the corresponding
  ATA device. This is inefficient, and also expose a restriction on
  calling path not holding any lock.
2 The binding to SCSI device tree makes code complex, while at the same
  time doesn't bring us any benefit. All ACPI handlings are still done
  in ATA module, not in SCSI.

Rework the ATA ACPI binding code to bind ACPI handle to ATA transport
devices(ATA port and ATA device). The binding needs to be done only once,
since the ATA transport devices do not go away with hotplug. And due to
this, the flush_work call in hotplug handler for ATA bay is no longer
needed.

Tested on an Intel test platform for binding and runtime power off for
ODD(ZPODD) and hard disk; on an ASUS S400C for binding and normal boot
and S3, where its SATA port node has _SDD and _GTF control methods when
configured as an AHCI controller and its PATA device node has _GTF
control method when configured as an IDE controller. SATA PMP binding
and ATA hotplug is not tested.

Signed-off-by: Aaron Lu 
Tested-by: Dirk Griesbach 
Signed-off-by: Tejun Heo

libata: export ata_port port_no attribute via /sys

2013-05-14T18:44:07+00:00

While registering host controller track port number based upon number
of ports available on the controller, export port_no attribute through
/sys. This patch is needed by udev for composing persistent links in
/dev/disk/by-path.

/sys/devices/pci0000:00/0000:00:1f.2/ata8/ata_port/ata8
total 0
lrwxrwxrwx. 1 root root    0 Mar  6 12:43 device -> ../../../ata8
-r--r--r--. 1 root root 4096 Mar  6 12:43 idle_irq
-r--r--r--. 1 root root 4096 Mar  6 12:43 nr_pmp_links
-r--r--r--. 1 root root 4096 Mar  6 12:43 port_no
drwxr-xr-x. 2 root root    0 Mar  6 12:42 power
lrwxrwxrwx. 1 root root    0 Mar  6 12:41 subsystem -> ../../../../../../class/ata_port
-rw-r--r--. 1 root root 4096 Mar  6 12:40 uevent
1

Signed-off-by: David Milburn 
Signed-off-by: Tejun Heo

libata-transport.c: local functions should not be exposed globally

2012-07-25T19:14:55+00:00

Functions not referenced outside of a source file should be marked
static to prevent it from being exposed globally.

This quiets the sparse warnings:

warning: symbol 'ata_is_port' was not declared. Should it be static?
warning: symbol 'ata_is_link' was not declared. Should it be static?
warning: symbol 'ata_is_ata_dev' was not declared. Should it be static?

Signed-off-by: H Hartley Sweeten 
Signed-off-by: Jeff Garzik

libata: forbid port runtime pm by default, fixing regression

2012-04-18T18:33:25+00:00

Forbid port runtime pm by default because it has known hotplug issue.
User can allow it by, for example

echo auto > /sys/devices/pci0000:00/0000:00:1f.2/ata2/power/control

Signed-off-by: Lin Ming 
Signed-off-by: Jeff Garzik

[libata] enable ata port async suspend

2012-01-18T01:48:06+00:00

This saves devices suspend/resume time.

Tested system suspend/resume with SATA IDE/AHCI mode 3 times.
Below is the time took for devices suspend/resume.

SATA mode    vanilla-kernel           patched-kernel
---------    ---------------------    ---------------------
IDE          suspend: 0.744           suspend: 0.432
             (0.716, 0.768, 0.748)    (0.440, 0.428, 0.428)

             resume: 5.084            resume: 2.209
             (5.100, 5.064, 5.088)    (2.168, 2.232, 2.228)

AHCI:        suspend: 0.725           suspend: 0.449
             (0.740, 0.708, 0.728)    (0.456, 0.448, 0.444)

             resume: 2.556            resume: 1.896
             (2.604, 2.492, 2.572)    (1.932, 1.872, 1.884)

Signed-off-by: Lin Ming 
Signed-off-by: Jeff Garzik

ata: add ata port runtime PM callbacks

2012-01-09T00:14:58+00:00

Add ata port runtime suspend/resume/idle callbacks.
Set ->eh_noresume to skip the runtime PM calls on scsi host
in the error handler to avoid dead lock.

Acked-by: Tejun Heo 
Signed-off-by: Lin Ming 
Signed-off-by: Jeff Garzik

ata: add ata port system PM callbacks

2012-01-09T00:14:58+00:00

Change ata_host_request_pm to ata_port_request_pm which performs
port suspend/resume.

Add ata port type driver which implements port PM callbacks.

Signed-off-by: Lin Ming 
Signed-off-by: Jeff Garzik

drivers/ata/libata-transport.c: include linux/slab.h

2010-10-22T00:21:04+00:00

Signed-off-by: Jeff Garzik