linux-toradex.git/drivers/ata/ahci.h, branch v4.4.10

ata: ahci: find eSATA ports and flag them as removable

2015-09-30T21:37:55+00:00

If the AHCI ports' HPCP or ESP bits are set, the port
should be considered external (e.g. eSATA) and is marked
as removable.  Userspace tools like udisks then treat it
like an usb drive.

With this patch applied, when I plug a drive into the esata port,
KDE pops up a window asking what to do with the drives(s), just
like it does for any random USB stick.

Removability is indicated to the upper layers by way of the
SCSI RMB bit, as I haven't found another way to signal
userspace to treat a sata disk like any usb stick.

Signed-off-by: Manuel Lauss 
Signed-off-by: Tejun Heo

ahci: Store irq number in struct ahci_host_priv

2015-06-03T05:37:49+00:00

Currently, ahci supports only msi and intx. To also support msix the
handling of the irq number need to be changed. The irq number for msix
devices is taken from msi_list instead of pci_dev. Thus, the irq
number of a device needs to be stored in struct ahci_host_priv now.
This allows the host controller to be activated in a generic way.

This change is only intended for ahci drivers. For that reason the irq
number is stored in struct ahci_host_priv used only by ahci drivers.
Thus, the ABI changes only for ahci_host_activate(), but existing ata
drivers (about 50) are unaffected and keep unchanged. All users of
ahci_host_activate() have been updated.

While touching drivers/ata/libahci.c, doing a small code cleanup in
ahci_port_start().

Signed-off-by: Robert Richter 
Signed-off-by: Tejun Heo

libahci: Add support to handle HOST_IRQ_STAT as edge trigger latch.

2015-05-10T15:52:44+00:00

This patch adds the support to handle HOST_IRQ_STAT as edge trigger
latch.

Signed-off-by: Suman Tripathi 
Signed-off-by: Tejun Heo

ata: ahci_platform: fix owner module reference mismatch for scsi host

2015-01-28T23:45:23+00:00

The owner module reference of the ahci platform's scsi_host is
initialized to libahci_platform's one, because these drivers use a
scsi_host_template defined in libahci_platform.  So these drivers can
be unloaded even if the scsi device is being accessed.

This fixes it by pushing the scsi_host_template from libahci_platform
to all leaf drivers.  The scsi_host_template is passed through a new
argument of ahci_platform_init_host().

Signed-off-by: Akinobu Mita 
Signed-off-by: Tejun Heo 
Cc: Hans de Goede 
Cc: Christoph Hellwig 
Cc: "James E.J. Bottomley" 
Cc: linux-ide@vger.kernel.org
Cc: linux-scsi@vger.kernel.org

ata: libahci: Allow using multiple regulators

2015-01-19T14:53:26+00:00

The current implementation of the libahci allows using multiple PHYs
but not multiple regulators. This patch adds the support of multiple
regulators. Until now it was mandatory to have a PHY under a subnode,
now a port subnode can contain either a regulator or a PHY (or both).

In order to be able to asociate a port with a regulator the port are
now a platform device in the device tree case.

There was only one driver which used directly the regulator field of
the ahci_host_priv structure. To preserve the bisectability the change
in the ahci_imx driver was done in the same patch.

Signed-off-by: Gregory CLEMENT 
Acked-by: Hans de Goede 
Signed-off-by: Tejun Heo

AHCI: Do not read HOST_IRQ_STAT reg in multi-MSI mode

2014-10-06T15:43:36+00:00

As described in AHCI v1.0 specification chapter 10.6.2.2
"Multiple MSI Based Messages" generation of interrupts
is not controlled through the HOST_IRQ_STAT register.

Considering MMIO access is expensive remove unnecessary
reading and writing of HOST_IRQ_STAT register.

Further, serializing access to the host data is no longer
needed and the interrupt service routine can avoid competing
on the host lock.

Signed-off-by: Alexander Gordeev 
Suggested-by: "Jiang, Dave" 
Signed-off-by: Tejun Heo 
Cc: "Jiang, Dave" 
Cc: linux-ide@vger.kernel.org

AHCI: Move host activation code into ahci_host_activate()

2014-10-06T15:43:35+00:00

Currently host activation done by calling either function
ahci_host_activate() or ata_host_activate(). Consolidate
the code by only calling ahci_host_activate() for all AHCI
devices.

Signed-off-by: Alexander Gordeev 
Signed-off-by: Tejun Heo 
Cc: linux-ide@vger.kernel.org

AHCI: Pass SCSI host template as arg to ahci_host_activate()

2014-10-06T15:43:34+00:00

This update is a prerequisite for consolidation of
AHCI host activation code within ahci_host_activate()
function.

Signed-off-by: Alexander Gordeev 
Signed-off-by: Tejun Heo 
Cc: linux-ide@vger.kernel.org

AHCI: Cleanup checking of multiple MSIs/SLM modes

2014-09-28T15:43:56+00:00

Sharing Last Message (SLM) mode is currently checked in two
functions: ahci_host_activate() and ahci_init_interrupts().
This update consolidates SLM mode check with activation of
multiple MSIs mode.

Signed-off-by: Alexander Gordeev 
Signed-off-by: Tejun Heo 
Cc: linux-ide@vger.kernel.org

ahci-platform: Bump max number of clocks to 5

2014-09-23T13:16:56+00:00

Qualcomm IPQ806x SoCs with SATA controllers need 5 clocks to be enabled.

Signed-off-by: Kumar Gala 
Reviewed-by: Hans de Goede 
Signed-off-by: Tejun Heo