Commit ede1e6f8 authored by HighPoint Linux Team's avatar HighPoint Linux Team Committed by James Bottomley
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[SCSI] hptiop: HighPoint RocketRAID 3xxx controller driver 



HighPoint RocketRAID 3220/3320 series 8 channel PCI-X SATA RAID Host
Adapters.

Fixes from original submission:

Merge Andrew Morton's patches:
- Provide locking for global list
- Fix debug printks
- uninline function with multiple callsites
- coding style fixups
- remove unneeded casts of void*
- kfree(NULL) is legal
- Don't "succeed" if register_chrdev() failed - otherwise we'll later
  unregister a not-registered chrdev.
- Don't return from hptiop_do_ioctl() with the spinlock held.
- uninline __hpt_do_ioctl()

Update for Arjan van de Ven's comments:
- put all asm/ includes after the linux/ ones
- replace mdelay with msleep
- add pci posting flush
- do not set pci command reqister in map_pci_bar
- do not try merging sg elements in hptiop_buildsgl()
- remove unused outstandingcommands member from hba structure
- remove unimplemented hptiop_abort() handler
- remove typedef u32 hpt_id_t

Other updates:
- fix endianess

Signed-off-by: default avatarHighPoint Linux Team <linux@highpoint-tech.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
parent cbd5f69b

Documentation/scsi/hptiop.txt

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HIGHPOINT ROCKETRAID 3xxx RAID DRIVER (hptiop)



Controller Register Map

-------------------------



The controller IOP is accessed via PCI BAR0.



     BAR0 offset    Register

            0x10    Inbound Message Register 0

            0x14    Inbound Message Register 1

            0x18    Outbound Message Register 0

            0x1C    Outbound Message Register 1

            0x20    Inbound Doorbell Register

            0x24    Inbound Interrupt Status Register

            0x28    Inbound Interrupt Mask Register

            0x30    Outbound Interrupt Status Register

            0x34    Outbound Interrupt Mask Register

            0x40    Inbound Queue Port

            0x44    Outbound Queue Port





I/O Request Workflow

----------------------



All queued requests are handled via inbound/outbound queue port.

A request packet can be allocated in either IOP or host memory.



To send a request to the controller:



    - Get a free request packet by reading the inbound queue port or

      allocate a free request in host DMA coherent memory.



      The value returned from the inbound queue port is an offset

      relative to the IOP BAR0.



      Requests allocated in host memory must be aligned on 32-bytes boundary.



    - Fill the packet.



    - Post the packet to IOP by writing it to inbound queue. For requests

      allocated in IOP memory, write the offset to inbound queue port. For

      requests allocated in host memory, write (0x80000000|(bus_addr>>5))

      to the inbound queue port.



    - The IOP process the request. When the request is completed, it

      will be put into outbound queue. An outbound interrupt will be

      generated.



      For requests allocated in IOP memory, the request offset is posted to

      outbound queue.



      For requests allocated in host memory, (0x80000000|(bus_addr>>5))

      is posted to the outbound queue. If IOP_REQUEST_FLAG_OUTPUT_CONTEXT

      flag is set in the request, the low 32-bit context value will be

      posted instead.



    - The host read the outbound queue and complete the request.



      For requests allocated in IOP memory, the host driver free the request

      by writing it to the outbound queue.



Non-queued requests (reset/flush etc) can be sent via inbound message

register 0. An outbound message with the same value indicates the completion

of an inbound message.





User-level Interface

---------------------



The driver exposes following sysfs attributes:



     NAME                 R/W    Description

     driver-version        R     driver version string

     firmware-version      R     firmware version string



The driver registers char device "hptiop" to communicate with HighPoint RAID

management software. Its ioctl routine acts as a general binary interface 

between the IOP firmware and HighPoint RAID management software. New management

functions can be implemented in application/firmware without modification

in driver code.





-----------------------------------------------------------------------------

Copyright (C) 2006 HighPoint Technologies, Inc. All Rights Reserved.



  This file is distributed in the hope that it will be useful,

  but WITHOUT ANY WARRANTY; without even the implied warranty of

  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  GNU General Public License for more details.



  linux@highpoint-tech.com

  http://www.highpoint-tech.com

MAINTAINERS

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@@ -1117,6 +1117,12 @@ L: linux-hams@vger.kernel.org 
W:	http://www.nt.tuwien.ac.at/~kkudielk/Linux/

S:	Maintained



HIGHPOINT ROCKETRAID 3xxx RAID DRIVER

P:	HighPoint Linux Team

M:	linux@highpoint-tech.com

W:	http://www.highpoint-tech.com

S:	Supported



HIPPI

P:	Jes Sorensen

M:	jes@trained-monkey.org

drivers/scsi/Kconfig

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@@ -530,6 +530,16 @@ config SCSI_PDC_ADMA 


	  If unsure, say N.



config SCSI_HPTIOP

	tristate "HighPoint RocketRAID 3xxx Controller support"

	depends on SCSI && PCI

	help

	  This option enables support for HighPoint RocketRAID 3xxx

	  controllers.



	  To compile this driver as a module, choose M here; the module

	  will be called hptiop. If unsure, say N.



config SCSI_SATA_QSTOR

	tristate "Pacific Digital SATA QStor support"

	depends on SCSI_SATA && PCI

drivers/scsi/Makefile

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@@ -136,6 +136,7 @@ obj-$(CONFIG_SCSI_SATA_NV) += libata.o sata_nv.o 
obj-$(CONFIG_SCSI_SATA_ULI)	+= libata.o sata_uli.o

obj-$(CONFIG_SCSI_SATA_MV)	+= libata.o sata_mv.o

obj-$(CONFIG_SCSI_PDC_ADMA)	+= libata.o pdc_adma.o

obj-$(CONFIG_SCSI_HPTIOP)	+= hptiop.o



obj-$(CONFIG_ARM)		+= arm/

drivers/scsi/hptiop.c

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