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Subject[PATCH] scsi: document generic scsi host sysfs attributes
From
Date
From: Stephen M. Cameron <scameron@beardog.cce.hp.com>

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
---
Documentation/ABI/testing/sysfs-bus-scsi | 129 ++++++++++++++++++++++++++++++
1 files changed, 129 insertions(+), 0 deletions(-)
create mode 100644 Documentation/ABI/testing/sysfs-bus-scsi

diff --git a/Documentation/ABI/testing/sysfs-bus-scsi b/Documentation/ABI/testing/sysfs-bus-scsi
new file mode 100644
index 0000000..088d16a
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-scsi
@@ -0,0 +1,129 @@
+What: /sys/bus/scsi/devices/host*/scsi_host/host*/unique_id
+Date: February, 2003
+KernelVersion: Unknown
+Contact: James Bottomley <James.Bottomley@HansenPartnership.com>
+Description:
+ Read only unsigned integer uniquely identifying the SCSI host
+ within the system. This value is assigned by the low level
+ driver.
+
+What: /sys/bus/scsi/devices/host*/scsi_host/host*/host_busy
+Date: February 2003
+KernelVersion: Unknown
+Contact: James Bottomley <James.Bottomley@HansenPartnership.com>
+Description:
+ Read only unsigned short integer indicating whether the SCSI
+ host is busy.
+
+What: /sys/bus/scsi/devices/host*/scsi_host/host*/cmd_per_lun
+Date: February 2003
+KernelVersion: Unknown
+Contact: James Bottomley <James.Bottomley@HansenPartnership.com>
+Description:
+ Read only short integer indicating how many concurrent
+ commands per logical unit the SCSI host supports.
+
+What: /sys/bus/scsi/devices/host*/scsi_host/host*/can_queue
+Date: October, 2006
+KernelVersion: Unknown
+Contact: James Bottomley <James.Bottomley@HansenPartnership.com>
+Description:
+ Read only short integer indicating the total number of
+ concurrent commands the SCSI host supports.
+
+What: /sys/bus/scsi/devices/host*/scsi_host/host*/sg_tablesize
+Date: February, 2003
+KernelVersion: Unknown
+Contact: James Bottomley <James.Bottomley@HansenPartnership.com>
+Description:
+ Read only unsigned short integer indicating how many scatter
+ gather entries are available for each command.
+
+What: /sys/bus/scsi/devices/host*/scsi_host/host*/sg_prot_tablesize
+Date: September, 2010
+KernelVersion: Unknown
+Contact: James Bottomley <James.Bottomley@HansenPartnership.com>
+Description:
+ Read only unsigned short integer which indicates how many
+ scatter gather entries are available for DIX integrity data.
+
+What: /sys/bus/scsi/devices/host*/scsi_host/host*/unchecked_isa_dma
+Date: February, 2003
+KernelVersion: Unknown
+Contact: James Bottomley <James.Bottomley@HansenPartnership.com>
+Description:
+ Read only integer which indicates whether the host is an
+ ancient ISA device which therefore requires extra bounce
+ buffering.
+
+What: /sys/bus/scsi/devices/host*/scsi_host/host*/proc_name
+Date: March, 2004
+KernelVersion: Unknown
+Contact: James Bottomley <James.Bottomley@HansenPartnership.com>
+Description:
+ Read only string which indicates the name of the proc
+ directory of a driver
+
+What: /sys/bus/scsi/devices/host*/scsi_host/host*/scan
+Date: August, 2003
+KernelVersion: Unknown
+Contact: James Bottomley <James.Bottomley@HansenPartnership.com>
+Description:
+ Write only attribute which causes the SCSI mid layer to
+ scan the SCSI host at the specified channel, bus, and id for
+ devices. The integer decimal value of -1 interpreted as
+ an unsigned integer (4294967295 on most architectures) may
+ be used as a wild card. For example:
+ echo 4294967295 4294967295 4294967295 > /sys/.../scan
+
+What: /sys/bus/scsi/devices/host*/scsi_host/host*/hstate
+Date: February, 2008
+KernelVersion: Unknown
+Contact: James Bottomley <James.Bottomley@HansenPartnership.com>
+Description:
+ String value which indicates the state of the SCSI host.
+ Possible values are: "created", "running", "cancel",
+ "deleted", "recovery", "cancel/recovery" and "deleted/recovery"
+
+What: /sys/bus/scsi/devices/host*/scsi_host/host*/supported_mode
+Date: October, 2007
+KernelVersion: Unknown
+Contact: James Bottomley <James.Bottomley@HansenPartnership.com>
+Description:
+ Read only string value which indicates the supported modes of
+ the SCSI host. Possible modes are: "Initiator" and "Target".
+
+What: /sys/bus/scsi/devices/host*/scsi_host/host*/active_mode
+Date: October, 2007
+KernelVersion: Unknown
+Contact: James Bottomley <James.Bottomley@HansenPartnership.com>
+Description:
+ Read only string value which indicates the currently active
+ mode of the SCSI host. Possible values are "Initiator",
+ "Target" and "unknown".
+
+What: /sys/bus/scsi/devices/host*/scsi_host/host*/prot_capabilities
+Date: July, 2008
+KernelVersion: Unknown
+Contact: James Bottomley <James.Bottomley@HansenPartnership.com>
+Description:
+ Read only unsigned integer bitmap which indicates what
+ data integrity capabilities the SCSI host supports.
+ Bit 0: T10 DIF type 1
+ Bit 1: T10 DIF type 2
+ Bit 2: T10 DIF type 3
+ Bit 3: DIX between OS and HBA only.
+ Bit 4: DIX with DIF type 1
+ Bit 5: DIX with DIF type 2
+ Bit 6: DIX with DIF type 3
+
+What: /sys/bus/scsi/devices/host*/scsi_host/host*/prot_guard_type
+Date: July, 2008
+KernelVersion: Unknown
+Contact: James Bottomley <James.Bottomley@HansenPartnership.com>
+Description:
+ Read only unsigned short bitmap value which indicates what
+ checksums DIX capable controllers implement.
+ Bit 0: DIX guard CRC.
+ Bit 1: DIX guard IP.
+


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