/*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
* The full GNU General Public License is included in this distribution
* in the file called LICENSE.GPL.
*
* BSD LICENSE
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _SCU_TASK_CONTEXT_H_
#define _SCU_TASK_CONTEXT_H_
/**
* This file contains the structures and constants for the SCU hardware task
* context.
*
*
*/
/**
* enum scu_ssp_task_type - This enumberation defines the various SSP task
* types the SCU hardware will accept. The definition for the various task
* types the SCU hardware will accept can be found in the DS specification.
*
*
*/
typedef enum {
SCU_TASK_TYPE_IOREAD, /* /< IO READ direction or no direction */
SCU_TASK_TYPE_IOWRITE, /* /< IO Write direction */
SCU_TASK_TYPE_SMP_REQUEST, /* /< SMP Request type */
SCU_TASK_TYPE_RESPONSE, /* /< Driver generated response frame (targt mode) */
SCU_TASK_TYPE_RAW_FRAME, /* /< Raw frame request type */
SCU_TASK_TYPE_PRIMITIVE /* /< Request for a primitive to be transmitted */
} scu_ssp_task_type;
/**
* enum scu_sata_task_type - This enumeration defines the various SATA task
* types the SCU hardware will accept. The definition for the various task
* types the SCU hardware will accept can be found in the DS specification.
*
*
*/
typedef enum {
SCU_TASK_TYPE_DMA_IN, /* /< Read request */
SCU_TASK_TYPE_FPDMAQ_READ, /* /< NCQ read request */
SCU_TASK_TYPE_PACKET_DMA_IN, /* /< Packet read request */
SCU_TASK_TYPE_SATA_RAW_FRAME, /* /< Raw frame request */
RESERVED_4,
RESERVED_5,
RESERVED_6,
RESERVED_7,
SCU_TASK_TYPE_DMA_OUT, /* /< Write request */
SCU_TASK_TYPE_FPDMAQ_WRITE, /* /< NCQ write Request */
SCU_TASK_TYPE_PACKET_DMA_OUT /* /< Packet write request */
} scu_sata_task_type;
/**
*
*
* SCU_CONTEXT_TYPE
*/
#define SCU_TASK_CONTEXT_TYPE 0
#define SCU_RNC_CONTEXT_TYPE 1
/**
*
*
* SCU_TASK_CONTEXT_VALIDITY
*/
#define SCU_TASK_CONTEXT_INVALID 0
#define SCU_TASK_CONTEXT_VALID 1
/**
*
*
* SCU_COMMAND_CODE
*/
#define SCU_COMMAND_CODE_INITIATOR_NEW_TASK 0
#define SCU_COMMAND_CODE_ACTIVE_TASK 1
#define SCU_COMMAND_CODE_PRIMITIVE_SEQ_TASK 2
#define SCU_COMMAND_CODE_TARGET_RAW_FRAMES 3
/**
*
*
* SCU_TASK_PRIORITY
*/
/**
*
*
* This priority is used when there is no priority request for this request.
*/
#define SCU_TASK_PRIORITY_NORMAL 0
/**
*
*
* This priority indicates that the task should be scheduled to the head of the
* queue. The task will NOT be executed if the TX is suspended for the remote
* node.
*/
#define SCU_TASK_PRIORITY_HEAD_OF_Q 1
/**
*
*
* This priority indicates that the task will be executed before all
* SCU_TASK_PRIORITY_NORMAL and SCU_TASK_PRIORITY_HEAD_OF_Q tasks. The task
* WILL be executed if the TX is suspended for the remote node.
*/
#define SCU_TASK_PRIORITY_HIGH 2
/**
*
*
* This task priority is reserved and should not be used.
*/
#define SCU_TASK_PRIORITY_RESERVED 3
#define SCU_TASK_INITIATOR_MODE 1
#define SCU_TASK_TARGET_MODE 0
#define SCU_TASK_REGULAR 0
#define SCU_TASK_ABORTED 1
/* direction bit defintion */
/**
*
*
* SATA_DIRECTION
*/
#define SCU_SATA_WRITE_DATA_DIRECTION 0
#define SCU_SATA_READ_DATA_DIRECTION 1
/**
*
*
* SCU_COMMAND_CONTEXT_MACROS These macros provide the mask and shift
* operations to construct the various SCU commands
*/
#define SCU_CONTEXT_COMMAND_REQUEST_TYPE_SHIFT 21
#define SCU_CONTEXT_COMMAND_REQUEST_TYPE_MASK 0x00E00000
#define scu_get_command_request_type(x) \
((x) & SCU_CONTEXT_COMMAND_REQUEST_TYPE_MASK)
#define SCU_CONTEXT_COMMAND_REQUEST_SUBTYPE_SHIFT 18
#define SCU_CONTEXT_COMMAND_REQUEST_SUBTYPE_MASK 0x001C0000
#define scu_get_command_request_subtype(x) \
((x) & SCU_CONTEXT_COMMAND_REQUEST_SUBTYPE_MASK)
#define SCU_CONTEXT_COMMAND_REQUEST_FULLTYPE_MASK \
(\
SCU_CONTEXT_COMMAND_REQUEST_TYPE_MASK \
| SCU_CONTEXT_COMMAND_REQUEST_SUBTYPE_MASK \
)
#define scu_get_command_request_full_type(x) \
((x) & SCU_CONTEXT_COMMAND_REQUEST_FULLTYPE_MASK)
#define SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT 16
#define SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_MASK 0x00010000
#define scu_get_command_protocl_engine_group(x) \
((x) & SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_MASK)
#define SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT 12
#define SCU_CONTEXT_COMMAND_LOGICAL_PORT_MASK 0x00007000
#define scu_get_command_reqeust_logical_port(x) \
((x) & SCU_CONTEXT_COMMAND_LOGICAL_PORT_MASK)
#define MAKE_SCU_CONTEXT_COMMAND_TYPE(type) \
((u32)(type) << SCU_CONTEXT_COMMAND_REQUEST_TYPE_SHIFT)
/**
* MAKE_SCU_CONTEXT_COMMAND_TYPE() -
*
* SCU_COMMAND_TYPES These constants provide the grouping of the different SCU
* command types.
*/
#define SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC MAKE_SCU_CONTEXT_COMMAND_TYPE(0)
#define SCU_CONTEXT_COMMAND_REQUEST_TYPE_DUMP_TC MAKE_SCU_CONTEXT_COMMAND_TYPE(1)
#define SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_RNC MAKE_SCU_CONTEXT_COMMAND_TYPE(2)
#define SCU_CONTEXT_COMMAND_REQUEST_TYPE_DUMP_RNC MAKE_SCU_CONTEXT_COMMAND_TYPE(3)
#define SCU_CONTEXT_COMMAND_REQUEST_TYPE_OTHER_RNC MAKE_SCU_CONTEXT_COMMAND_TYPE(6)
#define MAKE_SCU_CONTEXT_COMMAND_REQUEST(type, command) \
((type) | ((command) << SCU_CONTEXT_COMMAND_REQUEST_SUBTYPE_SHIFT))
/**
*
*
* SCU_REQUEST_TYPES These constants are the various request types that can be
* posted to the SCU hardware.
*/
#define SCU_CONTEXT_COMMAND_REQUST_POST_TC \
(MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC, 0))
#define SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT \
(MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC, 1))
#define SCU_CONTEXT_COMMAND_REQUST_DUMP_TC \
(MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_DUMP_TC, 0))
#define SCU_CONTEXT_COMMAND_POST_RNC_32 \
(MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_RNC, 0))
#define SCU_CONTEXT_COMMAND_POST_RNC_96 \
(MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_RNC, 1))
#define SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE \
(MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_RNC, 2))
#define SCU_CONTEXT_COMMAND_DUMP_RNC_32 \
(MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_DUMP_RNC, 0))
#define SCU_CONTEXT_COMMAND_DUMP_RNC_96 \
(MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_DUMP_RNC, 1))
#define SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX \
(MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_OTHER_RNC, 0))
#define SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX_RX \
(MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_OTHER_RNC, 1))
#define SCU_CONTEXT_COMMAND_POST_RNC_RESUME \
(MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_OTHER_RNC, 2))
#define SCU_CONTEXT_IT_NEXUS_LOSS_TIMER_ENABLE \
(MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_OTHER_RNC, 3))
#define SCU_CONTEXT_IT_NEXUS_LOSS_TIMER_DISABLE \
(MAKE_SCU_CONTEXT_COMMAND_REQUEST(SCU_CONTEXT_COMMAND_REQUEST_TYPE_OTHER_RNC, 4))
/**
*
*
* SCU_TASK_CONTEXT_PROTOCOL SCU Task context protocol types this is uesd to
* program the SCU Task context protocol field in word 0x00.
*/
#define SCU_TASK_CONTEXT_PROTOCOL_SMP 0x00
#define SCU_TASK_CONTEXT_PROTOCOL_SSP 0x01
#define SCU_TASK_CONTEXT_PROTOCOL_STP 0x02
#define SCU_TASK_CONTEXT_PROTOCOL_NONE 0x07
/**
* struct ssp_task_context - This is the SCU hardware definition for an SSP
* request.
*
*
*/
struct ssp_task_context {
/* OFFSET 0x18 */
u32 reserved00:24;
u32 frame_type:8;
/* OFFSET 0x1C */
u32 reserved01;
/* OFFSET 0x20 */
u32 fill_bytes:2;
u32 reserved02:6;
u32 changing_data_pointer:1;
u32 retransmit:1;
u32 retry_data_frame:1;
u32 tlr_control:2;
u32 reserved03:19;
/* OFFSET 0x24 */
u32 uiRsvd4;
/* OFFSET 0x28 */
u32 target_port_transfer_tag:16;
u32 tag:16;
/* OFFSET 0x2C */
u32 data_offset;
};
/**
* struct stp_task_context - This is the SCU hardware definition for an STP
* request.
*
*
*/
struct stp_task_context {
/* OFFSET 0x18 */
u32 fis_type:8;
u32 pm_port:4;
u32 reserved0:3;
u32 control:1;
u32 command:8;
u32 features:8;
/* OFFSET 0x1C */
u32 reserved1;
/* OFFSET 0x20 */
u32 reserved2;
/* OFFSET 0x24 */
u32 reserved3;
/* OFFSET 0x28 */
u32 ncq_tag:5;
u32 reserved4:27;
/* OFFSET 0x2C */
u32 data_offset; /* TODO: What is this used for? */
};
/**
* struct smp_task_context - This is the SCU hardware definition for an SMP
* request.
*
*
*/
struct smp_task_context {
/* OFFSET 0x18 */
u32 response_length:8;
u32 function_result:8;
u32 function:8;
u32 frame_type:8;
/* OFFSET 0x1C */
u32 smp_response_ufi:12;
u32 reserved1:20;
/* OFFSET 0x20 */
u32 reserved2;
/* OFFSET 0x24 */
u32 reserved3;
/* OFFSET 0x28 */
u32 reserved4;
/* OFFSET 0x2C */
u32 reserved5;
};
/**
* struct primitive_task_context - This is the SCU hardware definition used
* when the driver wants to send a primitive on the link.
*
*
*/
struct primitive_task_context {
/* OFFSET 0x18 */
/**
* This field is the control word and it must be 0.
*/
u32 control; /* /< must be set to 0 */
/* OFFSET 0x1C */
/**
* This field specifies the primitive that is to be transmitted.
*/
u32 sequence;
/* OFFSET 0x20 */
u32 reserved0;
/* OFFSET 0x24 */
u32 reserved1;
/* OFFSET 0x28 */
u32 reserved2;
/* OFFSET 0x2C */
u32 reserved3;
};
/**
* The union of the protocols that can be selected in the SCU task context
* field.
*
* protocol_context
*/
union protocol_context {
struct ssp_task_context ssp;
struct stp_task_context stp;
struct smp_task_context smp;
struct primitive_task_context primitive;
u32 words[6];
};
/**
* struct scu_sgl_element - This structure represents a single SCU defined SGL
* element. SCU SGLs contain a 64 bit address with the maximum data transfer
* being 24 bits in size. The SGL can not cross a 4GB boundary.
*
* struct scu_sgl_element
*/
struct scu_sgl_element {
/**
* This field is the upper 32 bits of the 64 bit physical address.
*/
u32 address_upper;
/**
* This field is the lower 32 bits of the 64 bit physical address.
*/
u32 address_lower;
/**
* This field is the number of bytes to transfer.
*/
u32 length:24;
/**
* This field is the address modifier to be used when a virtual function is
* requesting a data transfer.
*/
u32 address_modifier:8;
};
#define SCU_SGL_ELEMENT_PAIR_A 0
#define SCU_SGL_ELEMENT_PAIR_B 1
/**
* struct scu_sgl_element_pair - This structure is the SCU hardware definition
* of a pair of SGL elements. The SCU hardware always works on SGL pairs.
* They are refered to in the DS specification as SGL A and SGL B. Each SGL
* pair is followed by the address of the next pair.
*
*
*/
struct scu_sgl_element_pair {
/* OFFSET 0x60-0x68 */
/**
* This field is the SGL element A of the SGL pair.
*/
struct scu_sgl_element A;
/* OFFSET 0x6C-0x74 */
/**
* This field is the SGL element B of the SGL pair.
*/
struct scu_sgl_element B;
/* OFFSET 0x78-0x7C */
/**
* This field is the upper 32 bits of the 64 bit address to the next SGL
* element pair.
*/
u32 next_pair_upper;
/**
* This field is the lower 32 bits of the 64 bit address to the next SGL
* element pair.
*/
u32 next_pair_lower;
};
/**
* struct transport_snapshot - This structure is the SCU hardware scratch area
* for the task context. This is set to 0 by the driver but can be read by
* issuing a dump TC request to the SCU.
*
*
*/
struct transport_snapshot {
/* OFFSET 0x48 */
u32 xfer_rdy_write_data_length;
/* OFFSET 0x4C */
u32 data_offset;
/* OFFSET 0x50 */
u32 data_transfer_size:24;
u32 reserved_50_0:8;
/* OFFSET 0x54 */
u32 next_initiator_write_data_offset;
/* OFFSET 0x58 */
u32 next_initiator_write_data_xfer_size:24;
u32 reserved_58_0:8;
};
/**
* struct scu_task_context - This structure defines the contents of the SCU
* silicon task context. It lays out all of the fields according to the
* expected order and location for the Storage Controller unit.
*
*
*/
struct scu_task_context {
/* OFFSET 0x00 ------ */
/**
* This field must be encoded to one of the valid SCU task priority values
* - SCU_TASK_PRIORITY_NORMAL
* - SCU_TASK_PRIORITY_HEAD_OF_Q
* - SCU_TASK_PRIORITY_HIGH
*/
u32 priority:2;
/**
* This field must be set to true if this is an initiator generated request.
* Until target mode is supported all task requests are initiator requests.
*/
u32 initiator_request:1;
/**
* This field must be set to one of the valid connection rates valid values
* are 0x8, 0x9, and 0xA.
*/
u32 connection_rate:4;
/**
* This field muse be programed when generating an SMP response since the SMP
* connection remains open until the SMP response is generated.
*/
u32 protocol_engine_index:3;
/**
* This field must contain the logical port for the task request.
*/
u32 logical_port_index:3;
/**
* This field must be set to one of the SCU_TASK_CONTEXT_PROTOCOL values
* - SCU_TASK_CONTEXT_PROTOCOL_SMP
* - SCU_TASK_CONTEXT_PROTOCOL_SSP
* - SCU_TASK_CONTEXT_PROTOCOL_STP
* - SCU_TASK_CONTEXT_PROTOCOL_NONE
*/
u32 protocol_type:3;
/**
* This filed must be set to the TCi allocated for this task
*/
u32 task_index:12;
/**
* This field is reserved and must be set to 0x00
*/
u32 reserved_00_0:1;
/**
* For a normal task request this must be set to 0. If this is an abort of
* this task request it must be set to 1.
*/
u32 abort:1;
/**
* This field must be set to true for the SCU hardware to process the task.
*/
u32 valid:1;
/**
* This field must be set to SCU_TASK_CONTEXT_TYPE
*/
u32 context_type:1;
/* OFFSET 0x04 */
/**
* This field contains the RNi that is the target of this request.
*/
u32 remote_node_index:12;
/**
* This field is programmed if this is a mirrored request, which we are not
* using, in which case it is the RNi for the mirrored target.
*/
u32 mirrored_node_index:12;
/**
* This field is programmed with the direction of the SATA reqeust
* - SCU_SATA_WRITE_DATA_DIRECTION
* - SCU_SATA_READ_DATA_DIRECTION
*/
u32 sata_direction:1;
/**
* This field is programmsed with one of the following SCU_COMMAND_CODE
* - SCU_COMMAND_CODE_INITIATOR_NEW_TASK
* - SCU_COMMAND_CODE_ACTIVE_TASK
* - SCU_COMMAND_CODE_PRIMITIVE_SEQ_TASK
* - SCU_COMMAND_CODE_TARGET_RAW_FRAMES
*/
u32 command_code:2;
/**
* This field is set to true if the remote node should be suspended.
* This bit is only valid for SSP & SMP target devices.
*/
u32 suspend_node:1;
/**
* This field is programmed with one of the following command type codes
*
* For SAS requests use the scu_ssp_task_type
* - SCU_TASK_TYPE_IOREAD
* - SCU_TASK_TYPE_IOWRITE
* - SCU_TASK_TYPE_SMP_REQUEST
* - SCU_TASK_TYPE_RESPONSE
* - SCU_TASK_TYPE_RAW_FRAME
* - SCU_TASK_TYPE_PRIMITIVE
*
* For SATA requests use the scu_sata_task_type
* - SCU_TASK_TYPE_DMA_IN
* - SCU_TASK_TYPE_FPDMAQ_READ
* - SCU_TASK_TYPE_PACKET_DMA_IN
* - SCU_TASK_TYPE_SATA_RAW_FRAME
* - SCU_TASK_TYPE_DMA_OUT
* - SCU_TASK_TYPE_FPDMAQ_WRITE
* - SCU_TASK_TYPE_PACKET_DMA_OUT
*/
u32 task_type:4;
/* OFFSET 0x08 */
/**
* This field is reserved and the must be set to 0x00
*/
u32 link_layer_control:8; /* presently all reserved */
/**
* This field is set to true when TLR is to be enabled
*/
u32 ssp_tlr_enable:1;
/**
* This is field specifies if the SCU DMAs a response frame to host
* memory for good response frames when operating in target mode.
*/
u32 dma_ssp_target_good_response:1;
/**
* This field indicates if the SCU should DMA the response frame to
* host memory.
*/
u32 do_not_dma_ssp_good_response:1;
/**
* This field is set to true when strict ordering is to be enabled
*/
u32 strict_ordering:1;
/**
* This field indicates the type of endianess to be utilized for the
* frame. command, task, and response frames utilized control_frame
* set to 1.
*/
u32 control_frame:1;
/**
* This field is reserved and the driver should set to 0x00
*/
u32 tl_control_reserved:3;
/**
* This field is set to true when the SCU hardware task timeout control is to
* be enabled
*/
u32 timeout_enable:1;
/**
* This field is reserved and the driver should set it to 0x00
*/
u32 pts_control_reserved:7;
/**
* This field should be set to true when block guard is to be enabled
*/
u32 block_guard_enable:1;
/**
* This field is reserved and the driver should set to 0x00
*/
u32 sdma_control_reserved:7;
/* OFFSET 0x0C */
/**
* This field is the address modifier for this io request it should be
* programmed with the virtual function that is making the request.
*/
u32 address_modifier:16;
/**
* @todo What we support mirrored SMP response frame?
*/
u32 mirrored_protocol_engine:3; /* mirrored protocol Engine Index */
/**
* If this is a mirrored request the logical port index for the mirrored RNi
* must be programmed.
*/
u32 mirrored_logical_port:4; /* mirrored local port index */
/**
* This field is reserved and the driver must set it to 0x00
*/
u32 reserved_0C_0:8;
/**
* This field must be set to true if the mirrored request processing is to be
* enabled.
*/
u32 mirror_request_enable:1; /* Mirrored request Enable */
/* OFFSET 0x10 */
/**
* This field is the command iu length in dwords
*/
u32 ssp_command_iu_length:8;
/**
* This is the target TLR enable bit it must be set to 0 when creatning the
* task context.
*/
u32 xfer_ready_tlr_enable:1;
/**
* This field is reserved and the driver must set it to 0x00
*/
u32 reserved_10_0:7;
/**
* This is the maximum burst size that the SCU hardware will send in one
* connection its value is (N x 512) and N must be a multiple of 2. If the
* value is 0x00 then maximum burst size is disabled.
*/
u32 ssp_max_burst_size:16;
/* OFFSET 0x14 */
/**
* This filed is set to the number of bytes to be transfered in the request.
*/
u32 transfer_length_bytes:24; /* In terms of bytes */
/**
* This field is reserved and the driver should set it to 0x00
*/
u32 reserved_14_0:8;
/* OFFSET 0x18-0x2C */
/**
* This union provides for the protocol specif part of the SCU Task Context.
*/
union protocol_context type;
/* OFFSET 0x30-0x34 */
/**
* This field is the upper 32 bits of the 64 bit physical address of the
* command iu buffer
*/
u32 command_iu_upper;
/**
* This field is the lower 32 bits of the 64 bit physical address of the
* command iu buffer
*/
u32 command_iu_lower;
/* OFFSET 0x38-0x3C */
/**
* This field is the upper 32 bits of the 64 bit physical address of the
* response iu buffer
*/
u32 response_iu_upper;
/**
* This field is the lower 32 bits of the 64 bit physical address of the
* response iu buffer
*/
u32 response_iu_lower;
/* OFFSET 0x40 */
/**
* This field is set to the task phase of the SCU hardware. The driver must
* set this to 0x01
*/
u32 task_phase:8;
/**
* This field is set to the transport layer task status. The driver must set
* this to 0x00
*/
u32 task_status:8;
/**
* This field is used during initiator write TLR
*/
u32 previous_extended_tag:4;
/**
* This field is set the maximum number of retries for a STP non-data FIS
*/
u32 stp_retry_count:2;
/**
* This field is reserved and the driver must set it to 0x00
*/
u32 reserved_40_1:2;
/**
* This field is used by the SCU TL to determine when to take a snapshot when
* transmitting read data frames.
* - 0x00 The entire IO
* - 0x01 32k
* - 0x02 64k
* - 0x04 128k
* - 0x08 256k
*/
u32 ssp_tlr_threshold:4;
/**
* This field is reserved and the driver must set it to 0x00
*/
u32 reserved_40_2:4;
/* OFFSET 0x44 */
u32 write_data_length; /* read only set to 0 */
/* OFFSET 0x48-0x58 */
struct transport_snapshot snapshot; /* read only set to 0 */
/* OFFSET 0x5C */
u32 blk_prot_en:1;
u32 blk_sz:2;
u32 blk_prot_func:2;
u32 reserved_5C_0:9;
u32 active_sgl_element:2; /* read only set to 0 */
u32 sgl_exhausted:1; /* read only set to 0 */
u32 payload_data_transfer_error:4; /* read only set to 0 */
u32 frame_buffer_offset:11; /* read only set to 0 */
/* OFFSET 0x60-0x7C */
/**
* This field is the first SGL element pair found in the TC data structure.
*/
struct scu_sgl_element_pair sgl_pair_ab;
/* OFFSET 0x80-0x9C */
/**
* This field is the second SGL element pair found in the TC data structure.
*/
struct scu_sgl_element_pair sgl_pair_cd;
/* OFFSET 0xA0-BC */
struct scu_sgl_element_pair sgl_snapshot_ac;
/* OFFSET 0xC0 */
u32 active_sgl_element_pair; /* read only set to 0 */
/* OFFSET 0xC4-0xCC */
u32 reserved_C4_CC[3];
/* OFFSET 0xD0 */
u32 interm_crc_val:16;
u32 init_crc_seed:16;
/* OFFSET 0xD4 */
u32 app_tag_verify:16;
u32 app_tag_gen:16;
/* OFFSET 0xD8 */
u32 ref_tag_seed_verify;
/* OFFSET 0xDC */
u32 UD_bytes_immed_val:13;
u32 reserved_DC_0:3;
u32 DIF_bytes_immed_val:4;
u32 reserved_DC_1:12;
/* OFFSET 0xE0 */
u32 bgc_blk_sz:13;
u32 reserved_E0_0:3;
u32 app_tag_gen_mask:16;
/* OFFSET 0xE4 */
union {
u16 bgctl;
struct {
u16 crc_verify:1;
u16 app_tag_chk:1;
u16 ref_tag_chk:1;
u16 op:2;
u16 legacy:1;
u16 invert_crc_seed:1;
u16 ref_tag_gen:1;
u16 fixed_ref_tag:1;
u16 invert_crc:1;
u16 app_ref_f_detect:1;
u16 uninit_dif_check_err:1;
u16 uninit_dif_bypass:1;
u16 app_f_detect:1;
u16 reserved_0:2;
} bgctl_f;
};
u16 app_tag_verify_mask;
/* OFFSET 0xE8 */
u32 blk_guard_err:8;
u32 reserved_E8_0:24;
/* OFFSET 0xEC */
u32 ref_tag_seed_gen;
/* OFFSET 0xF0 */
u32 intermediate_crc_valid_snapshot:16;
u32 reserved_F0_0:16;
/* OFFSET 0xF4 */
u32 reference_tag_seed_for_verify_function_snapshot;
/* OFFSET 0xF8 */
u32 snapshot_of_reserved_dword_DC_of_tc;
/* OFFSET 0xFC */
u32 reference_tag_seed_for_generate_function_snapshot;
} __packed;
#endif /* _SCU_TASK_CONTEXT_H_ */
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