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* hpilo: add locking commentDavid Altobelli2009-12-111-1/+12
| | | | | | | | | Add explanation about lock nesting and purpose of each lock in hpilo. Signed-off-by: David Altobelli <david.altobelli@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* hpilo: add interrupt handlerDavid Altobelli2009-09-151-1/+7
| | | | | | | | | | Add interrupt handler to hpilo. This is enablement for poll handler, and it also simplifies the logic for handling an iLO reset, because now only the interrupt handler needs to look for reset, the file system interfaces only need to return failure when a reset has happened. Signed-off-by: David Altobelli <david.altobelli@hp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* hpilo: reduce frequency of IO operationsDavid Altobelli2009-04-011-1/+5
| | | | | | | | | | | | | Change hpilo open and close logic to spin for 10usec between checking device, rather than every usec. Because the loop is coded to take up to 10ms, it seemed prudent to increase the interval between polling the device, to reduce the load on the system and allow more other work to happen. Signed-off-by: David Altobelli <david.altobelli@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* hpilo: open/close fixDavid Altobelli2009-02-051-0/+2
| | | | | | | | | | | | | | | The device can take a while to respond to an open/close request, so increase the time kernel will wait for response (1 ms to 10ms). Also, properly clean up a channel on a failed open, by calling the channel close routine. Just freeing the memory isn't sufficient, the device needs to be informed that the channel is no longer open, and the device memory cleared of references to freed dma buffer. Signed-off-by: David Altobelli <david.altobelli@hp.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* HP iLO driverDavid Altobelli2008-07-211-0/+189
A driver for the HP iLO/iLO2 management processor, which allows userspace programs to query the management processor. Programs can open a channel to the device (/dev/hpilo/dXccbN), and use this to send/receive queries. The O_EXCL open flag is used to indicate that a particular channel cannot be shared between processes. This driver will replace various packages HP has shipped, including hprsm and hp-ilo. Signed-off-by: David Altobelli <david.altobelli@hp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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