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* [SCSI] hpsa: Fix hard reset code.Stephen M. Cameron2010-07-271-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Smart Array controllers newer than the P600 do not honor the PCI power state method of resetting the controllers. Instead, in these cases we can get them to reset via the "doorbell" register. This escaped notice until we began using "performant" mode because the fact that the controllers did not reset did not normally impede subsequent operation, and so things generally appeared to "work". Once the performant mode code was added, if the controller does not reset, it remains in performant mode. The code immediately after the reset presumes the controller is in "simple" mode (which previously, it had remained in simple mode the whole time). If the controller remains in performant mode any code which presumes it is in simple mode will not work. So the reset needs to be fixed. Unfortunately there are some controllers which cannot be reset by either method. (eg. p800). We detect these cases by noticing that the controller seems to remain in performant mode even after a reset has been attempted. In those case, we proceed anyway, as if the reset has happened (and skip the step of waiting for the controller to become ready -- which is expecting it to be in "simple" mode.) To sum up, we try to do a better job of resetting the controller if "reset_devices" is set, and if it doesn't work, we print a message and try to continue anyway. Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] hpsa: remove unneeded definesMike Miller2010-05-021-15/+0
| | | | | | | | This patch removes unnecessary #define's from hpsa. The SCSI midlayer handles all this for us. Signed-off-by: Mike Miller <mike.miller@hp.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] hpsa: remove unused members next, prev, and retry_count from command ↵Stephen M. Cameron2010-03-031-5/+2
| | | | | | | list structure. Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] hpsa: Increase the number of scatter gather elements supported.Stephen M. Cameron2010-03-031-3/+4
| | | | | | | | | | | | | | This uses the scatter-gather chaining feature of Smart Array controllers. 32 scatter-gather elements are embedded in the "command list", and the last element in the list may be marked as a "chain pointer", and point to an additional block of scatter gather elements. The precise number of scatter gather elements supported is dependent on the particular kind of Smart Array, and is determined at runtime by querying the hardware. Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] hpsa: Clarify calculation of padding for commandlist structureStephen M. Cameron2010-03-031-4/+10
| | | | | Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] hpsa: Allow multiple command completions per interrupt.Don Brace2010-02-171-15/+63
| | | | | | | | | | | | | This is done by adding support for the so-called "performant mode" (that's really what they called it). Smart Array controllers have a mode which enables multiple command completions to be delivered with a single interrupt, "performant" mode. We want to use that mode, as some newer controllers will be requiring this mode. Signed-off-by: Don Brace <brace@beardog.cce.hp.com> Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Mike Miller <mikem@beardog.cce.hp.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] hpsa: Use kernel integer types, not userland onesStephen M. Cameron2010-02-171-73/+73
| | | | | | | That is, use u64, u32, u16 and u8 rather than __u64, __u32, __u16 and __u8. Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] hpsa: fix typo in commentsStephen M. Cameron2010-02-171-1/+1
| | | | | Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* [SCSI] hpsa: add driver for HP Smart Array controllers.Stephen M. Cameron2009-12-101-0/+326
This driver supports a subset of HP Smart Array Controllers. It is a SCSI alternative to the cciss driver. [akpm@linux-foundation.org: avoid helpful cleanup patches] [achiang@hp.com: make device attrs static] [akpm@linux-foundation.org: msleep() does set_current_state() itself] Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Mike Miller <mikem@beardog.cce.hp.com> Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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