diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-21 22:03:38 -0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-21 22:03:38 -0400 |
commit | e10117d36ef758da0690c95ecffc09d5dd7da479 (patch) | |
tree | f2bb867cfc33f24d9c6bbb36dd189869e62ecce2 /Documentation/ABI | |
parent | f3270b16e00f0614fa418dcc50883da5949375b4 (diff) | |
parent | 89692c03226a066a017048cf7fbacbaa645f0e79 (diff) |
Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev: (26 commits)
include/linux/libata.h: fix typo
pata_bf54x: fix return type of bfin_set_devctl
Drivers: ata: Makefile: replace the use of <module>-objs with <module>-y
libahci: fix result_tf handling after an ATA PIO data-in command
pata_sl82c105: implement sff_irq_check() method
pata_sil680: implement sff_irq_check() method
pata_pdc202xx_old: implement sff_irq_check() method
pata_cmd640: implement sff_irq_check() method
ata_piix: Add device ID for ICH4-L
pata_sil680: make sil680_sff_exec_command() 'static'
ata: Intel IDE-R support
libata: reorder ata_queued_cmd to remove alignment padding on 64 bit builds
libata: Signal that our SATL supports WRITE SAME(16) with UNMAP
ata_piix: remove SIDPR locking
libata: implement cross-port EH exclusion
libata: add @ap to ata_wait_register() and introduce ata_msleep()
ata_piix: implement LPM support
libata: implement LPM support for port multipliers
libata: reimplement link power management
libata: implement sata_link_scr_lpm() and make ata_dev_set_feature() global
...
Diffstat (limited to 'Documentation/ABI')
-rw-r--r-- | Documentation/ABI/testing/sysfs-ata | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-ata b/Documentation/ABI/testing/sysfs-ata new file mode 100644 index 000000000000..0a932155cbba --- /dev/null +++ b/Documentation/ABI/testing/sysfs-ata | |||
@@ -0,0 +1,99 @@ | |||
1 | What: /sys/class/ata_... | ||
2 | Date: August 2008 | ||
3 | Contact: Gwendal Grignou<gwendal@google.com> | ||
4 | Description: | ||
5 | |||
6 | Provide a place in sysfs for storing the ATA topology of the system. This allows | ||
7 | retrieving various information about ATA objects. | ||
8 | |||
9 | Files under /sys/class/ata_port | ||
10 | ------------------------------- | ||
11 | |||
12 | For each port, a directory ataX is created where X is the ata_port_id of | ||
13 | the port. The device parent is the ata host device. | ||
14 | |||
15 | idle_irq (read) | ||
16 | |||
17 | Number of IRQ received by the port while idle [some ata HBA only]. | ||
18 | |||
19 | nr_pmp_links (read) | ||
20 | |||
21 | If a SATA Port Multiplier (PM) is connected, number of link behind it. | ||
22 | |||
23 | Files under /sys/class/ata_link | ||
24 | ------------------------------- | ||
25 | |||
26 | Behind each port, there is a ata_link. If there is a SATA PM in the | ||
27 | topology, 15 ata_link objects are created. | ||
28 | |||
29 | If a link is behind a port, the directory name is linkX, where X is | ||
30 | ata_port_id of the port. | ||
31 | If a link is behind a PM, its name is linkX.Y where X is ata_port_id | ||
32 | of the parent port and Y the PM port. | ||
33 | |||
34 | hw_sata_spd_limit | ||
35 | |||
36 | Maximum speed supported by the connected SATA device. | ||
37 | |||
38 | sata_spd_limit | ||
39 | |||
40 | Maximum speed imposed by libata. | ||
41 | |||
42 | sata_spd | ||
43 | |||
44 | Current speed of the link [1.5, 3Gps,...]. | ||
45 | |||
46 | Files under /sys/class/ata_device | ||
47 | --------------------------------- | ||
48 | |||
49 | Behind each link, up to two ata device are created. | ||
50 | The name of the directory is devX[.Y].Z where: | ||
51 | - X is ata_port_id of the port where the device is connected, | ||
52 | - Y the port of the PM if any, and | ||
53 | - Z the device id: for PATA, there is usually 2 devices [0,1], | ||
54 | only 1 for SATA. | ||
55 | |||
56 | class | ||
57 | Device class. Can be "ata" for disk, "atapi" for packet device, | ||
58 | "pmp" for PM, or "none" if no device was found behind the link. | ||
59 | |||
60 | dma_mode | ||
61 | |||
62 | Transfer modes supported by the device when in DMA mode. | ||
63 | Mostly used by PATA device. | ||
64 | |||
65 | pio_mode | ||
66 | |||
67 | Transfer modes supported by the device when in PIO mode. | ||
68 | Mostly used by PATA device. | ||
69 | |||
70 | xfer_mode | ||
71 | |||
72 | Current transfer mode. | ||
73 | |||
74 | id | ||
75 | |||
76 | Cached result of IDENTIFY command, as described in ATA8 7.16 and 7.17. | ||
77 | Only valid if the device is not a PM. | ||
78 | |||
79 | gscr | ||
80 | |||
81 | Cached result of the dump of PM GSCR register. | ||
82 | Valid registers are: | ||
83 | 0: SATA_PMP_GSCR_PROD_ID, | ||
84 | 1: SATA_PMP_GSCR_REV, | ||
85 | 2: SATA_PMP_GSCR_PORT_INFO, | ||
86 | 32: SATA_PMP_GSCR_ERROR, | ||
87 | 33: SATA_PMP_GSCR_ERROR_EN, | ||
88 | 64: SATA_PMP_GSCR_FEAT, | ||
89 | 96: SATA_PMP_GSCR_FEAT_EN, | ||
90 | 130: SATA_PMP_GSCR_SII_GPIO | ||
91 | Only valid if the device is a PM. | ||
92 | |||
93 | spdn_cnt | ||
94 | |||
95 | Number of time libata decided to lower the speed of link due to errors. | ||
96 | |||
97 | ering | ||
98 | |||
99 | Formatted output of the error ring of the device. | ||