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Documentation / scsi / hptiop.txt




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Based on kernel version 2.6.33. Page generated on 2010-02-24 15:36 EST.

1	HIGHPOINT ROCKETRAID 3xxx/4xxx ADAPTER DRIVER (hptiop)
2	
3	Controller Register Map
4	-------------------------
5	
6	For RR44xx Intel IOP based adapters, the controller IOP is accessed via PCI BAR0 and BAR2:
7	
8	     BAR0 offset    Register
9	            0x11C5C Link Interface IRQ Set
10	            0x11C60 Link Interface IRQ Clear
11	
12	     BAR2 offset    Register
13	            0x10    Inbound Message Register 0
14	            0x14    Inbound Message Register 1
15	            0x18    Outbound Message Register 0
16	            0x1C    Outbound Message Register 1
17	            0x20    Inbound Doorbell Register
18	            0x24    Inbound Interrupt Status Register
19	            0x28    Inbound Interrupt Mask Register
20	            0x30    Outbound Interrupt Status Register
21	            0x34    Outbound Interrupt Mask Register
22	            0x40    Inbound Queue Port
23	            0x44    Outbound Queue Port
24	
25	For Intel IOP based adapters, the controller IOP is accessed via PCI BAR0:
26	
27	     BAR0 offset    Register
28	            0x10    Inbound Message Register 0
29	            0x14    Inbound Message Register 1
30	            0x18    Outbound Message Register 0
31	            0x1C    Outbound Message Register 1
32	            0x20    Inbound Doorbell Register
33	            0x24    Inbound Interrupt Status Register
34	            0x28    Inbound Interrupt Mask Register
35	            0x30    Outbound Interrupt Status Register
36	            0x34    Outbound Interrupt Mask Register
37	            0x40    Inbound Queue Port
38	            0x44    Outbound Queue Port
39	
40	For Marvell IOP based adapters, the IOP is accessed via PCI BAR0 and BAR1:
41	
42	     BAR0 offset    Register
43	         0x20400    Inbound Doorbell Register
44	         0x20404    Inbound Interrupt Mask Register
45	         0x20408    Outbound Doorbell Register
46	         0x2040C    Outbound Interrupt Mask Register
47	
48	     BAR1 offset    Register
49	             0x0    Inbound Queue Head Pointer
50	             0x4    Inbound Queue Tail Pointer
51	             0x8    Outbound Queue Head Pointer
52	             0xC    Outbound Queue Tail Pointer
53	            0x10    Inbound Message Register
54	            0x14    Outbound Message Register
55	     0x40-0x1040    Inbound Queue
56	   0x1040-0x2040    Outbound Queue
57	
58	
59	I/O Request Workflow
60	----------------------
61	
62	All queued requests are handled via inbound/outbound queue port.
63	A request packet can be allocated in either IOP or host memory.
64	
65	To send a request to the controller:
66	
67	    - Get a free request packet by reading the inbound queue port or
68	      allocate a free request in host DMA coherent memory.
69	
70	      The value returned from the inbound queue port is an offset
71	      relative to the IOP BAR0.
72	
73	      Requests allocated in host memory must be aligned on 32-bytes boundary.
74	
75	    - Fill the packet.
76	
77	    - Post the packet to IOP by writing it to inbound queue. For requests
78	      allocated in IOP memory, write the offset to inbound queue port. For
79	      requests allocated in host memory, write (0x80000000|(bus_addr>>5))
80	      to the inbound queue port.
81	
82	    - The IOP process the request. When the request is completed, it
83	      will be put into outbound queue. An outbound interrupt will be
84	      generated.
85	
86	      For requests allocated in IOP memory, the request offset is posted to
87	      outbound queue.
88	
89	      For requests allocated in host memory, (0x80000000|(bus_addr>>5))
90	      is posted to the outbound queue. If IOP_REQUEST_FLAG_OUTPUT_CONTEXT
91	      flag is set in the request, the low 32-bit context value will be
92	      posted instead.
93	
94	    - The host read the outbound queue and complete the request.
95	
96	      For requests allocated in IOP memory, the host driver free the request
97	      by writing it to the outbound queue.
98	
99	Non-queued requests (reset/flush etc) can be sent via inbound message
100	register 0. An outbound message with the same value indicates the completion
101	of an inbound message.
102	
103	
104	User-level Interface
105	---------------------
106	
107	The driver exposes following sysfs attributes:
108	
109	     NAME                 R/W    Description
110	     driver-version        R     driver version string
111	     firmware-version      R     firmware version string
112	
113	
114	-----------------------------------------------------------------------------
115	Copyright (C) 2006-2009 HighPoint Technologies, Inc. All Rights Reserved.
116	
117	  This file is distributed in the hope that it will be useful,
118	  but WITHOUT ANY WARRANTY; without even the implied warranty of
119	  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
120	  GNU General Public License for more details.
121	
122	  linux[AT]highpoint-tech[DOT]com
123	  http://www.highpoint-tech.com
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