Release 4.11 drivers/scsi/isci/scu_remote_node_context.h
/*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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* General Public License for more details.
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* BSD LICENSE
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#ifndef __SCU_REMOTE_NODE_CONTEXT_HEADER__
#define __SCU_REMOTE_NODE_CONTEXT_HEADER__
/**
* This file contains the structures and constatns used by the SCU hardware to
* describe a remote node context.
*
*
*/
/**
* struct ssp_remote_node_context - This structure contains the SCU hardware
* definition for an SSP remote node.
*
*
*/
struct ssp_remote_node_context {
/* WORD 0 */
/**
* This field is the remote node index assigned for this remote node. All
* remote nodes must have a unique remote node index. The value of the remote
* node index can not exceed the maximum number of remote nodes reported in
* the SCU device context capacity register.
*/
u32 remote_node_index:12;
u32 reserved0_1:4;
/**
* This field tells the SCU hardware how many simultaneous connections that
* this remote node will support.
*/
u32 remote_node_port_width:4;
/**
* This field tells the SCU hardware which logical port to associate with this
* remote node.
*/
u32 logical_port_index:3;
u32 reserved0_2:5;
/**
* This field will enable the I_T nexus loss timer for this remote node.
*/
u32 nexus_loss_timer_enable:1;
/**
* This field is the for driver debug only and is not used.
*/
u32 check_bit:1;
/**
* This field must be set to true when the hardware DMAs the remote node
* context to the hardware SRAM. When the remote node is being invalidated
* this field must be set to false.
*/
u32 is_valid:1;
/**
* This field must be set to true.
*/
u32 is_remote_node_context:1;
/* WORD 1 - 2 */
/**
* This is the low word of the remote device SAS Address
*/
u32 remote_sas_address_lo;
/**
* This field is the high word of the remote device SAS Address
*/
u32 remote_sas_address_hi;
/* WORD 3 */
/**
* This field reprensets the function number assigned to this remote device.
* This value must match the virtual function number that is being used to
* communicate to the device.
*/
u32 function_number:8;
u32 reserved3_1:8;
/**
* This field provides the driver a way to cheat on the arbitration wait time
* for this remote node.
*/
u32 arbitration_wait_time:16;
/* WORD 4 */
/**
* This field tells the SCU hardware how long this device may occupy the
* connection before it must be closed.
*/
u32 connection_occupancy_timeout:16;
/**
* This field tells the SCU hardware how long to maintain a connection when
* there are no frames being transmitted on the link.
*/
u32 connection_inactivity_timeout:16;
/* WORD 5 */
/**
* This field allows the driver to cheat on the arbitration wait time for this
* remote node.
*/
u32 initial_arbitration_wait_time:16;
/**
* This field is tells the hardware what to program for the connection rate in
* the open address frame. See the SAS spec for valid values.
*/
u32 oaf_connection_rate:4;
/**
* This field tells the SCU hardware what to program for the features in the
* open address frame. See the SAS spec for valid values.
*/
u32 oaf_features:4;
/**
* This field tells the SCU hardware what to use for the source zone group in
* the open address frame. See the SAS spec for more details on zoning.
*/
u32 oaf_source_zone_group:8;
/* WORD 6 */
/**
* This field tells the SCU hardware what to use as the more capibilities in
* the open address frame. See the SAS Spec for details.
*/
u32 oaf_more_compatibility_features;
/* WORD 7 */
u32 reserved7;
};
/**
* struct stp_remote_node_context - This structure contains the SCU hardware
* definition for a STP remote node.
*
* STP Targets are not yet supported so this definition is a placeholder until
* we do support them.
*/
struct stp_remote_node_context {
/**
* Placeholder data for the STP remote node.
*/
u32 data[8];
};
/**
* This union combines the SAS and SATA remote node definitions.
*
* union scu_remote_node_context
*/
union scu_remote_node_context {
/**
* SSP Remote Node
*/
struct ssp_remote_node_context ssp;
/**
* STP Remote Node
*/
struct stp_remote_node_context stp;
};
#endif /* __SCU_REMOTE_NODE_CONTEXT_HEADER__ */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dan J Williams | 173 | 100.00% | 1 | 100.00% |
| Total | 173 | 100.00% | 1 | 100.00% |
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