mirror of https://gitee.com/openkylin/linux.git
93 lines
3.3 KiB
Plaintext
93 lines
3.3 KiB
Plaintext
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HIGHPOINT ROCKETRAID 3xxx RAID DRIVER (hptiop)
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Controller Register Map
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-------------------------
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The controller IOP is accessed via PCI BAR0.
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BAR0 offset Register
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0x10 Inbound Message Register 0
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0x14 Inbound Message Register 1
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0x18 Outbound Message Register 0
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0x1C Outbound Message Register 1
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0x20 Inbound Doorbell Register
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0x24 Inbound Interrupt Status Register
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0x28 Inbound Interrupt Mask Register
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0x30 Outbound Interrupt Status Register
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0x34 Outbound Interrupt Mask Register
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0x40 Inbound Queue Port
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0x44 Outbound Queue Port
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I/O Request Workflow
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----------------------
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All queued requests are handled via inbound/outbound queue port.
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A request packet can be allocated in either IOP or host memory.
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To send a request to the controller:
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- Get a free request packet by reading the inbound queue port or
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allocate a free request in host DMA coherent memory.
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The value returned from the inbound queue port is an offset
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relative to the IOP BAR0.
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Requests allocated in host memory must be aligned on 32-bytes boundary.
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- Fill the packet.
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- Post the packet to IOP by writing it to inbound queue. For requests
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allocated in IOP memory, write the offset to inbound queue port. For
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requests allocated in host memory, write (0x80000000|(bus_addr>>5))
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to the inbound queue port.
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- The IOP process the request. When the request is completed, it
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will be put into outbound queue. An outbound interrupt will be
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generated.
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For requests allocated in IOP memory, the request offset is posted to
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outbound queue.
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For requests allocated in host memory, (0x80000000|(bus_addr>>5))
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is posted to the outbound queue. If IOP_REQUEST_FLAG_OUTPUT_CONTEXT
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flag is set in the request, the low 32-bit context value will be
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posted instead.
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- The host read the outbound queue and complete the request.
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For requests allocated in IOP memory, the host driver free the request
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by writing it to the outbound queue.
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Non-queued requests (reset/flush etc) can be sent via inbound message
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register 0. An outbound message with the same value indicates the completion
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of an inbound message.
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User-level Interface
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---------------------
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The driver exposes following sysfs attributes:
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NAME R/W Description
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driver-version R driver version string
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firmware-version R firmware version string
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The driver registers char device "hptiop" to communicate with HighPoint RAID
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management software. Its ioctl routine acts as a general binary interface
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between the IOP firmware and HighPoint RAID management software. New management
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functions can be implemented in application/firmware without modification
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in driver code.
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-----------------------------------------------------------------------------
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Copyright (C) 2006 HighPoint Technologies, Inc. All Rights Reserved.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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linux@highpoint-tech.com
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http://www.highpoint-tech.com
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