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-rw-r--r--Documentation/ABI/testing/sysfs-ata171
-rw-r--r--Documentation/ABI/testing/sysfs-block-device58
-rw-r--r--Documentation/ABI/testing/sysfs-class-scsi_host89
-rw-r--r--drivers/ata/ahci.c4
-rw-r--r--drivers/ata/libahci.c10
-rw-r--r--drivers/ata/libahci_platform.c2
-rw-r--r--drivers/ata/libata-core.c26
-rw-r--r--drivers/ata/libata-eh.c3
-rw-r--r--drivers/ata/libata-scsi.c12
-rw-r--r--drivers/ata/sata_rcar.c62
-rw-r--r--drivers/pci/quirks.c2
11 files changed, 337 insertions, 102 deletions
diff --git a/Documentation/ABI/testing/sysfs-ata b/Documentation/ABI/testing/sysfs-ata
index aa4296498859..9ab0ef1dd1c7 100644
--- a/Documentation/ABI/testing/sysfs-ata
+++ b/Documentation/ABI/testing/sysfs-ata
@@ -1,110 +1,139 @@
1What: /sys/class/ata_... 1What: /sys/class/ata_...
2Date: August 2008
3Contact: Gwendal Grignou<gwendal@google.com>
4Description: 2Description:
5 3 Provide a place in sysfs for storing the ATA topology of the
6Provide a place in sysfs for storing the ATA topology of the system. This allows 4 system. This allows retrieving various information about ATA
7retrieving various information about ATA objects. 5 objects.
8 6
9Files under /sys/class/ata_port 7Files under /sys/class/ata_port
10------------------------------- 8-------------------------------
11 9
12 For each port, a directory ataX is created where X is the ata_port_id of 10For each port, a directory ataX is created where X is the ata_port_id of the
13 the port. The device parent is the ata host device. 11port. The device parent is the ata host device.
14 12
15idle_irq (read)
16 13
17 Number of IRQ received by the port while idle [some ata HBA only]. 14What: /sys/class/ata_port/ataX/nr_pmp_links
15What: /sys/class/ata_port/ataX/idle_irq
16Date: May, 2010
17KernelVersion: v2.6.37
18Contact: Gwendal Grignou <gwendal@chromium.org>
19Description:
20 nr_pmp_links: (RO) If a SATA Port Multiplier (PM) is
21 connected, the number of links behind it.
18 22
19nr_pmp_links (read) 23 idle_irq: (RO) Number of IRQ received by the port while
24 idle [some ata HBA only].
20 25
21 If a SATA Port Multiplier (PM) is connected, number of link behind it. 26
27What: /sys/class/ata_port/ataX/port_no
28Date: May, 2013
29KernelVersion: v3.11
30Contact: Gwendal Grignou <gwendal@chromium.org>
31Description:
32 (RO) Host local port number. While registering host controller,
33 port numbers are tracked based upon number of ports available on
34 the controller. This attribute is needed by udev for composing
35 persistent links in /dev/disk/by-path.
22 36
23Files under /sys/class/ata_link 37Files under /sys/class/ata_link
24------------------------------- 38-------------------------------
25 39
26 Behind each port, there is a ata_link. If there is a SATA PM in the 40Behind each port, there is a ata_link. If there is a SATA PM in the topology, 15
27 topology, 15 ata_link objects are created. 41ata_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 42
34hw_sata_spd_limit 43If a link is behind a port, the directory name is linkX, where X is ata_port_id
44of the port. If a link is behind a PM, its name is linkX.Y where X is
45ata_port_id of the parent port and Y the PM port.
35 46
36 Maximum speed supported by the connected SATA device.
37 47
38sata_spd_limit 48What: /sys/class/ata_link/linkX[.Y]/hw_sata_spd_limit
49What: /sys/class/ata_link/linkX[.Y]/sata_spd_limit
50What: /sys/class/ata_link/linkX[.Y]/sata_spd
51Date: May, 2010
52KernelVersion: v2.6.37
53Contact: Gwendal Grignou <gwendal@chromium.org>
54Description:
55 hw_sata_spd_limit: (RO) Maximum speed supported by the
56 connected SATA device.
39 57
40 Maximum speed imposed by libata. 58 sata_spd_limit: (RO) Maximum speed imposed by libata.
41 59
42sata_spd 60 sata_spd: (RO) Current speed of the link
61 eg. 1.5, 3 Gbps etc.
43 62
44 Current speed of the link [1.5, 3Gps,...].
45 63
46Files under /sys/class/ata_device 64Files under /sys/class/ata_device
47--------------------------------- 65---------------------------------
48 66
49 Behind each link, up to two ata device are created. 67Behind each link, up to two ata devices are created.
50 The name of the directory is devX[.Y].Z where: 68The name of the directory is devX[.Y].Z where:
51 - X is ata_port_id of the port where the device is connected, 69- X is ata_port_id of the port where the device is connected,
52 - Y the port of the PM if any, and 70- Y the port of the PM if any, and
53 - Z the device id: for PATA, there is usually 2 devices [0,1], 71- Z the device id: for PATA, there is usually 2 devices [0,1], only 1 for SATA.
54 only 1 for SATA. 72
55 73
56class 74What: /sys/class/ata_device/devX[.Y].Z/spdn_cnt
57 Device class. Can be "ata" for disk, "atapi" for packet device, 75What: /sys/class/ata_device/devX[.Y].Z/gscr
58 "pmp" for PM, or "none" if no device was found behind the link. 76What: /sys/class/ata_device/devX[.Y].Z/ering
59 77What: /sys/class/ata_device/devX[.Y].Z/id
60dma_mode 78What: /sys/class/ata_device/devX[.Y].Z/pio_mode
79What: /sys/class/ata_device/devX[.Y].Z/xfer_mode
80What: /sys/class/ata_device/devX[.Y].Z/dma_mode
81What: /sys/class/ata_device/devX[.Y].Z/class
82Date: May, 2010
83KernelVersion: v2.6.37
84Contact: Gwendal Grignou <gwendal@chromium.org>
85Description:
86 spdn_cnt: (RO) Number of times libata decided to lower the
87 speed of link due to errors.
61 88
62 Transfer modes supported by the device when in DMA mode. 89 gscr: (RO) Cached result of the dump of PM GSCR
63 Mostly used by PATA device. 90 register. Valid registers are:
64 91
65pio_mode 92 0: SATA_PMP_GSCR_PROD_ID,
93 1: SATA_PMP_GSCR_REV,
94 2: SATA_PMP_GSCR_PORT_INFO,
95 32: SATA_PMP_GSCR_ERROR,
96 33: SATA_PMP_GSCR_ERROR_EN,
97 64: SATA_PMP_GSCR_FEAT,
98 96: SATA_PMP_GSCR_FEAT_EN,
99 130: SATA_PMP_GSCR_SII_GPIO
66 100
67 Transfer modes supported by the device when in PIO mode. 101 Only valid if the device is a PM.
68 Mostly used by PATA device.
69 102
70xfer_mode 103 ering: (RO) Formatted output of the error ring of the
104 device.
71 105
72 Current transfer mode. 106 id: (RO) Cached result of IDENTIFY command, as
107 described in ATA8 7.16 and 7.17. Only valid if
108 the device is not a PM.
73 109
74id 110 pio_mode: (RO) Transfer modes supported by the device when
111 in PIO mode. Mostly used by PATA device.
75 112
76 Cached result of IDENTIFY command, as described in ATA8 7.16 and 7.17. 113 xfer_mode: (RO) Current transfer mode
77 Only valid if the device is not a PM.
78 114
79gscr 115 dma_mode: (RO) Transfer modes supported by the device when
116 in DMA mode. Mostly used by PATA device.
80 117
81 Cached result of the dump of PM GSCR register. 118 class: (RO) Device class. Can be "ata" for disk,
82 Valid registers are: 119 "atapi" for packet device, "pmp" for PM, or
83 0: SATA_PMP_GSCR_PROD_ID, 120 "none" if no device was found behind the link.
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.
92 121