mirror of
https://github.com/torvalds/linux.git
synced 2024-11-14 08:02:07 +00:00
93 lines
3.3 KiB
Plaintext
93 lines
3.3 KiB
Plaintext
|
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
|