100 строки
2.4 KiB
Plaintext
100 строки
2.4 KiB
Plaintext
|
What: /sys/class/ata_...
|
||
|
|
Date: August 2008
|
||
|
|
Contact: Gwendal Grignou<gwendal@google.com>
|
||
|
|
Description:
|
||
|
|
|
||
|
|
Provide a place in sysfs for storing the ATA topology of the system. This allows
|
||
|
|
retrieving various information about ATA objects.
|
||
|
|
|
||
|
|
Files under /sys/class/ata_port
|
||
|
|
-------------------------------
|
||
|
|
|
||
|
|
For each port, a directory ataX is created where X is the ata_port_id of
|
||
|
|
the port. The device parent is the ata host device.
|
||
|
|
|
||
|
|
idle_irq (read)
|
||
|
|
|
||
|
|
Number of IRQ received by the port while idle [some ata HBA only].
|
||
|
|
|
||
|
|
nr_pmp_links (read)
|
||
|
|
|
||
|
|
If a SATA Port Multiplier (PM) is connected, number of link behind it.
|
||
|
|
|
||
|
|
Files under /sys/class/ata_link
|
||
|
|
-------------------------------
|
||
|
|
|
||
|
|
Behind each port, there is a ata_link. If there is a SATA PM in the
|
||
|
|
topology, 15 ata_link objects are created.
|
||
|
|
|
||
|
|
If a link is behind a port, the directory name is linkX, where X is
|
||
|
|
ata_port_id of the port.
|
||
|
|
If a link is behind a PM, its name is linkX.Y where X is ata_port_id
|
||
|
|
of the parent port and Y the PM port.
|
||
|
|
|
||
|
|
hw_sata_spd_limit
|
||
|
|
|
||
|
|
Maximum speed supported by the connected SATA device.
|
||
|
|
|
||
|
|
sata_spd_limit
|
||
|
|
|
||
|
|
Maximum speed imposed by libata.
|
||
|
|
|
||
|
|
sata_spd
|
||
|
|
|
||
|
|
Current speed of the link [1.5, 3Gps,...].
|
||
|
|
|
||
|
|
Files under /sys/class/ata_device
|
||
|
|
---------------------------------
|
||
|
|
|
||
|
|
Behind each link, up to two ata device are created.
|
||
|
|
The name of the directory is devX[.Y].Z where:
|
||
|
|
- X is ata_port_id of the port where the device is connected,
|
||
|
|
- Y the port of the PM if any, and
|
||
|
|
- Z the device id: for PATA, there is usually 2 devices [0,1],
|
||
|
|
only 1 for SATA.
|
||
|
|
|
||
|
|
class
|
||
|
|
Device class. Can be "ata" for disk, "atapi" for packet device,
|
||
|
|
"pmp" for PM, or "none" if no device was found behind the link.
|
||
|
|
|
||
|
|
dma_mode
|
||
|
|
|
||
|
|
Transfer modes supported by the device when in DMA mode.
|
||
|
|
Mostly used by PATA device.
|
||
|
|
|
||
|
|
pio_mode
|
||
|
|
|
||
|
|
Transfer modes supported by the device when in PIO mode.
|
||
|
|
Mostly used by PATA device.
|
||
|
|
|
||
|
|
xfer_mode
|
||
|
|
|
||
|
|
Current transfer mode.
|
||
|
|
|
||
|
|
id
|
||
|
|
|
||
|
|
Cached result of IDENTIFY command, as described in ATA8 7.16 and 7.17.
|
||
|
|
Only valid if the device is not a PM.
|
||
|
|
|
||
|
|
gscr
|
||
|
|
|
||
|
|
Cached result of the dump of PM GSCR register.
|
||
|
|
Valid registers are:
|
||
|
|
0: SATA_PMP_GSCR_PROD_ID,
|
||
|
|
1: SATA_PMP_GSCR_REV,
|
||
|
|
2: SATA_PMP_GSCR_PORT_INFO,
|
||
|
|
32: SATA_PMP_GSCR_ERROR,
|
||
|
|
33: SATA_PMP_GSCR_ERROR_EN,
|
||
|
|
64: SATA_PMP_GSCR_FEAT,
|
||
|
|
96: SATA_PMP_GSCR_FEAT_EN,
|
||
|
|
130: SATA_PMP_GSCR_SII_GPIO
|
||
|
|
Only valid if the device is a PM.
|
||
|
|
|
||
|
|
spdn_cnt
|
||
|
|
|
||
|
|
Number of time libata decided to lower the speed of link due to errors.
|
||
|
|
|
||
|
|
ering
|
||
|
|
|
||
|
|
Formatted output of the error ring of the device.
|