About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Documentation / ABI / stable / sysfs-driver-ib_srp




Custom Search

Based on kernel version 3.16. Page generated on 2014-08-06 21:35 EST.

1	What:		/sys/class/infiniband_srp/srp-<hca>-<port_number>/add_target
2	Date:		January 2, 2006
3	KernelVersion:	2.6.15
4	Contact:	linux-rdma@vger.kernel.org
5	Description:	Interface for making ib_srp connect to a new target.
6			One can request ib_srp to connect to a new target by writing
7			a comma-separated list of login parameters to this sysfs
8			attribute. The supported parameters are:
9			* id_ext, a 16-digit hexadecimal number specifying the eight
10			  byte identifier extension in the 16-byte SRP target port
11			  identifier. The target port identifier is sent by ib_srp
12			  to the target in the SRP_LOGIN_REQ request.
13			* ioc_guid, a 16-digit hexadecimal number specifying the eight
14			  byte I/O controller GUID portion of the 16-byte target port
15			  identifier.
16			* dgid, a 32-digit hexadecimal number specifying the
17			  destination GID.
18			* pkey, a four-digit hexadecimal number specifying the
19			  InfiniBand partition key.
20			* service_id, a 16-digit hexadecimal number specifying the
21			  InfiniBand service ID used to establish communication with
22			  the SRP target. How to find out the value of the service ID
23			  is specified in the documentation of the SRP target.
24			* max_sect, a decimal number specifying the maximum number of
25			  512-byte sectors to be transferred via a single SCSI command.
26			* max_cmd_per_lun, a decimal number specifying the maximum
27			  number of outstanding commands for a single LUN.
28			* io_class, a hexadecimal number specifying the SRP I/O class.
29			  Must be either 0xff00 (rev 10) or 0x0100 (rev 16a). The I/O
30			  class defines the format of the SRP initiator and target
31			  port identifiers.
32			* initiator_ext, a 16-digit hexadecimal number specifying the
33			  identifier extension portion of the SRP initiator port
34			  identifier. This data is sent by the initiator to the target
35			  in the SRP_LOGIN_REQ request.
36			* cmd_sg_entries, a number in the range 1..255 that specifies
37			  the maximum number of data buffer descriptors stored in the
38			  SRP_CMD information unit itself. With allow_ext_sg=0 the
39			  parameter cmd_sg_entries defines the maximum S/G list length
40			  for a single SRP_CMD, and commands whose S/G list length
41			  exceeds this limit after S/G list collapsing will fail.
42			* allow_ext_sg, whether ib_srp is allowed to include a partial
43			  memory descriptor list in an SRP_CMD instead of the entire
44			  list. If a partial memory descriptor list has been included
45			  in an SRP_CMD the remaining memory descriptors are
46			  communicated from initiator to target via an additional RDMA
47			  transfer. Setting allow_ext_sg to 1 increases the maximum
48			  amount of data that can be transferred between initiator and
49			  target via a single SCSI command. Since not all SRP target
50			  implementations support partial memory descriptor lists the
51			  default value for this option is 0.
52			* sg_tablesize, a number in the range 1..2048 specifying the
53			  maximum S/G list length the SCSI layer is allowed to pass to
54			  ib_srp. Specifying a value that exceeds cmd_sg_entries is
55			  only safe with partial memory descriptor list support enabled
56			  (allow_ext_sg=1).
57			* comp_vector, a number in the range 0..n-1 specifying the
58			  MSI-X completion vector. Some HCA's allocate multiple (n)
59			  MSI-X vectors per HCA port. If the IRQ affinity masks of
60			  these interrupts have been configured such that each MSI-X
61			  interrupt is handled by a different CPU then the comp_vector
62			  parameter can be used to spread the SRP completion workload
63			  over multiple CPU's.
64			* tl_retry_count, a number in the range 2..7 specifying the
65			  IB RC retry count.
66			* queue_size, the maximum number of commands that the
67			  initiator is allowed to queue per SCSI host. The default
68			  value for this parameter is 62. The lowest supported value
69			  is 2.
70	
71	What:		/sys/class/infiniband_srp/srp-<hca>-<port_number>/ibdev
72	Date:		January 2, 2006
73	KernelVersion:	2.6.15
74	Contact:	linux-rdma@vger.kernel.org
75	Description:	HCA name (<hca>).
76	
77	What:		/sys/class/infiniband_srp/srp-<hca>-<port_number>/port
78	Date:		January 2, 2006
79	KernelVersion:	2.6.15
80	Contact:	linux-rdma@vger.kernel.org
81	Description:	HCA port number (<port_number>).
82	
83	What:		/sys/class/scsi_host/host<n>/allow_ext_sg
84	Date:		May 19, 2011
85	KernelVersion:	2.6.39
86	Contact:	linux-rdma@vger.kernel.org
87	Description:	Whether ib_srp is allowed to include a partial memory
88			descriptor list in an SRP_CMD when communicating with an SRP
89			target.
90	
91	What:		/sys/class/scsi_host/host<n>/cmd_sg_entries
92	Date:		May 19, 2011
93	KernelVersion:	2.6.39
94	Contact:	linux-rdma@vger.kernel.org
95	Description:	Maximum number of data buffer descriptors that may be sent to
96			the target in a single SRP_CMD request.
97	
98	What:		/sys/class/scsi_host/host<n>/dgid
99	Date:		June 17, 2006
100	KernelVersion:	2.6.17
101	Contact:	linux-rdma@vger.kernel.org
102	Description:	InfiniBand destination GID used for communication with the SRP
103			target. Differs from orig_dgid if port redirection has happened.
104	
105	What:		/sys/class/scsi_host/host<n>/id_ext
106	Date:		June 17, 2006
107	KernelVersion:	2.6.17
108	Contact:	linux-rdma@vger.kernel.org
109	Description:	Eight-byte identifier extension portion of the 16-byte target
110			port identifier.
111	
112	What:		/sys/class/scsi_host/host<n>/ioc_guid
113	Date:		June 17, 2006
114	KernelVersion:	2.6.17
115	Contact:	linux-rdma@vger.kernel.org
116	Description:	Eight-byte I/O controller GUID portion of the 16-byte target
117			port identifier.
118	
119	What:		/sys/class/scsi_host/host<n>/local_ib_device
120	Date:		November 29, 2006
121	KernelVersion:	2.6.19
122	Contact:	linux-rdma@vger.kernel.org
123	Description:	Name of the InfiniBand HCA used for communicating with the
124			SRP target.
125	
126	What:		/sys/class/scsi_host/host<n>/local_ib_port
127	Date:		November 29, 2006
128	KernelVersion:	2.6.19
129	Contact:	linux-rdma@vger.kernel.org
130	Description:	Number of the HCA port used for communicating with the
131			SRP target.
132	
133	What:		/sys/class/scsi_host/host<n>/orig_dgid
134	Date:		June 17, 2006
135	KernelVersion:	2.6.17
136	Contact:	linux-rdma@vger.kernel.org
137	Description:	InfiniBand destination GID specified in the parameters
138			written to the add_target sysfs attribute.
139	
140	What:		/sys/class/scsi_host/host<n>/pkey
141	Date:		June 17, 2006
142	KernelVersion:	2.6.17
143	Contact:	linux-rdma@vger.kernel.org
144	Description:	A 16-bit number representing the InfiniBand partition key used
145			for communication with the SRP target.
146	
147	What:		/sys/class/scsi_host/host<n>/req_lim
148	Date:		October 20, 2010
149	KernelVersion:	2.6.36
150	Contact:	linux-rdma@vger.kernel.org
151	Description:	Number of requests ib_srp can send to the target before it has
152			to wait for more credits. For more information see also the
153			SRP credit algorithm in the SRP specification.
154	
155	What:		/sys/class/scsi_host/host<n>/service_id
156	Date:		June 17, 2006
157	KernelVersion:	2.6.17
158	Contact:	linux-rdma@vger.kernel.org
159	Description:	InfiniBand service ID used for establishing communication with
160			the SRP	target.
161	
162	What:		/sys/class/scsi_host/host<n>/sgid
163	Date:		February 1, 2014
164	KernelVersion:	3.13
165	Contact:	linux-rdma@vger.kernel.org
166	Description:	InfiniBand GID of the source port used for communication with
167			the SRP target.
168	
169	What:		/sys/class/scsi_host/host<n>/zero_req_lim
170	Date:		September 20, 2006
171	KernelVersion:	2.6.18
172	Contact:	linux-rdma@vger.kernel.org
173	Description:	Number of times the initiator had to wait before sending a
174			request to the target because it ran out of credits. For more
175			information see also the SRP credit algorithm in the SRP
176			specification.
Hide Line Numbers
About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Information is copyright its respective author. All material is available from the Linux Kernel Source distributed under a GPL License. This page is provided as a free service by mjmwired.net.