3 files changed, 108 insertions, 1 deletions

diff --git a/Documentation/ABI/testing/debugfs-pktcdvd b/Documentation/ABI/testing/debugfs-pktcdvd
new file mode 100644
index 000000000000..03dbd883cc41
--- /dev/null
+++ b/Documentation/ABI/testing/debugfs-pktcdvd
@@ -0,0 +1,20 @@
+What:           /debug/pktcdvd/pktcdvd[0-7]
+Date:           Oct. 2006
+KernelVersion:  2.6.19
+Contact:        Thomas Maier <balagi@justmail.de>
+Description:
+
+debugfs interface
+-----------------
+
+The pktcdvd module (packet writing driver) creates
+these files in debugfs:
+
+/debug/pktcdvd/pktcdvd[0-7]/
+    info            (0444) Lots of human readable driver
+                           statistics and infos. Multiple lines!
+
+Example:
+-------
+
+cat /debug/pktcdvd/pktcdvd0/info
diff --git a/Documentation/ABI/testing/sysfs-class-pktcdvd b/Documentation/ABI/testing/sysfs-class-pktcdvd
new file mode 100644
index 000000000000..c4c55edc9a5c
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-pktcdvd
@@ -0,0 +1,72 @@
+What:           /sys/class/pktcdvd/
+Date:           Oct. 2006
+KernelVersion:  2.6.19
+Contact:        Thomas Maier <balagi@justmail.de>
+Description:
+
+sysfs interface
+---------------
+
+The pktcdvd module (packet writing driver) creates
+these files in the sysfs:
+(<devid> is in format  major:minor )
+
+/sys/class/pktcdvd/
+    add            (0200)  Write a block device id (major:minor)
+                           to create a new pktcdvd device and map
+                           it to the block device.
+
+    remove         (0200)  Write the pktcdvd device id (major:minor)
+                           to it to remove the pktcdvd device.
+
+    device_map     (0444)  Shows the device mapping in format:
+                             pktcdvd[0-7] <pktdevid> <blkdevid>
+
+/sys/class/pktcdvd/pktcdvd[0-7]/
+    dev                   (0444) Device id
+    uevent                (0200) To send an uevent.
+
+/sys/class/pktcdvd/pktcdvd[0-7]/stat/
+    packets_started       (0444) Number of started packets.
+    packets_finished      (0444) Number of finished packets.
+
+    kb_written            (0444) kBytes written.
+    kb_read               (0444) kBytes read.
+    kb_read_gather        (0444) kBytes read to fill write packets.
+
+    reset                 (0200) Write any value to it to reset
+                                 pktcdvd device statistic values, like
+                                 bytes read/written.
+
+/sys/class/pktcdvd/pktcdvd[0-7]/write_queue/
+    size                  (0444) Contains the size of the bio write
+                                 queue.
+
+    congestion_off        (0644) If bio write queue size is below
+                                 this mark, accept new bio requests
+                                 from the block layer.
+
+    congestion_on         (0644) If bio write queue size is higher
+                                 as this mark, do no longer accept
+                                 bio write requests from the block
+                                 layer and wait till the pktcdvd
+                                 device has processed enough bio's
+                                 so that bio write queue size is
+                                 below congestion off mark.
+                                 A value of <= 0 disables congestion
+                                 control.
+
+
+Example:
+--------
+To use the pktcdvd sysfs interface directly, you can do:
+
+# create a new pktcdvd device mapped to /dev/hdc
+echo "22:0" >/sys/class/pktcdvd/add
+cat /sys/class/pktcdvd/device_map
+# assuming device pktcdvd0 was created, look at stat's
+cat /sys/class/pktcdvd/pktcdvd0/stat/kb_written
+# print the device id of the mapped block device
+fgrep pktcdvd0 /sys/class/pktcdvd/device_map
+# remove device, using pktcdvd0 device id   253:0
+echo "253:0" >/sys/class/pktcdvd/remove
diff --git a/Documentation/ABI/testing/sysfs-power b/Documentation/ABI/testing/sysfs-power
index d882f8093871..dcff4d0623ad 100644
--- a/Documentation/ABI/testing/sysfs-power
+++ b/Documentation/ABI/testing/sysfs-power
@@ -21,7 +21,7 @@ Description:
                 these states.
 
 What:           /sys/power/disk
-Date:           August 2006
+Date:           September 2006
 Contact:        Rafael J. Wysocki <rjw@sisk.pl>
 Description:
                 The /sys/power/disk file controls the operating mode of the
@@ -39,6 +39,19 @@ Description:
                 'reboot' - the memory image will be saved by the kernel and
                 the system will be rebooted.
 
+                Additionally, /sys/power/disk can be used to turn on one of the
+                two testing modes of the suspend-to-disk mechanism: 'testproc'
+                or 'test'.  If the suspend-to-disk mechanism is in the
+                'testproc' mode, writing 'disk' to /sys/power/state will cause
+                the kernel to disable nonboot CPUs and freeze tasks, wait for 5
+                seconds, unfreeze tasks and enable nonboot CPUs.  If it is in
+                the 'test' mode, writing 'disk' to /sys/power/state will cause
+                the kernel to disable nonboot CPUs and freeze tasks, shrink
+                memory, suspend devices, wait for 5 seconds, resume devices,
+                unfreeze tasks and enable nonboot CPUs.  Then, we are able to
+                look in the log messages and work out, for example, which code
+                is being slow and which device drivers are misbehaving.
+
                 The suspend-to-disk method may be chosen by writing to this
                 file one of the accepted strings:
 
@@ -46,6 +59,8 @@ Description:
                 'platform'
                 'shutdown'
                 'reboot'
+                'testproc'
+                'test'
 
                 It will only change to 'firmware' or 'platform' if the system
                 supports that.