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path: root/drivers/ata/libata-transport.c
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2016-06-17ata: fix "ering" sysfs time printingArnd Bergmann1-4/+5
The sysfs file for the libata error handling has multiple issues in the way it prints time stamps: * it prints a 9-digit nanosecond value using a %06lu format string, which drops some leading zeroes * it converts a 64-bit jiffes value to a timespec using jiffies_to_timespec(), which takes a 'long' argument, so the result is wrong after a jiffies overflow (49 days). * we try to avoid using timespec because that generally overflows in 2038, although this particular usage is ok. This replaces the jiffies_to_timespec call with an open-coded implementation that gets it right. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Tejun Heo <tj@kernel.org>
2015-07-15libata: add ATA_HORKAGE_NOTRIMArne Fitzenreiter1-0/+2
Some devices lose data on TRIM whether queued or not. This patch adds a horkage to disable TRIM. tj: Collapsed unnecessary if() nesting. Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org> Signed-off-by: Tejun Heo <tj@kernel.org> Cc: stable@vger.kernel.org
2015-05-05libata: Expose TRIM capability in sysfsMartin K. Petersen1-0/+22
Create a sysfs "trim" attribute for each ata_device that displays whether DSM TRIM is "unsupported", "unqueued", "forced_unqueued" (blacklisted) or "queued". Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Tejun Heo <tj@kernel.org>
2014-11-05libata: Implement ATA_DEV_ZACHannes Reinecke1-0/+1
Add new ATA device type for ZAC devices. Acked-by: Christoph Hellwig <hch@lst.de> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Tejun Heo <tj@kernel.org>
2013-10-27libata: Fix display of sata speedGwendal Grignou1-8/+8
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 <gwendal@google.com> Signed-off-by: Tejun Heo <tj@kernel.org> Cc: stable@vger.kernel.org
2013-08-23ata: acpi: rework the ata acpi bind supportAaron Lu1-0/+2
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 <aaron.lu@intel.com> Tested-by: Dirk Griesbach <spamthis@freenet.de> Signed-off-by: Tejun Heo <tj@kernel.org>
2013-05-14libata: export ata_port port_no attribute via /sysDavid Milburn1-1/+3
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 <dmilburn@redhat.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2012-07-25libata-transport.c: local functions should not be exposed globallyH Hartley Sweeten1-3/+3
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 <hsweeten@visionengravers.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2012-04-18libata: forbid port runtime pm by default, fixing regressionLin Ming1-0/+1
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 <ming.m.lin@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2012-01-18[libata] enable ata port async suspendLin Ming1-0/+1
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 <ming.m.lin@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2012-01-09ata: add ata port runtime PM callbacksLin Ming1-0/+4
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 <tj@kernel.org> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2012-01-09ata: add ata port system PM callbacksLin Ming1-0/+1
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 <ming.m.lin@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2010-10-22drivers/ata/libata-transport.c: include linux/slab.hJeff Garzik1-0/+1
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2010-10-22[libata] Add ATA transport classGwendal Grignou1-0/+773
This is a scheleton for libata transport class. All information is read only, exporting information from libata: - ata_port class: one per ATA port - ata_link class: one per ATA port or 15 for SATA Port Multiplier - ata_device class: up to 2 for PATA link, usually one for SATA. Signed-off-by: Gwendal Grignou <gwendal@google.com> Reviewed-by: Grant Grundler <grundler@google.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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