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Diffstat (limited to 'drivers/scsi/isci/scu_task_context.h')
| -rw-r--r-- | drivers/scsi/isci/scu_task_context.h | 942 |
1 files changed, 942 insertions, 0 deletions
diff --git a/drivers/scsi/isci/scu_task_context.h b/drivers/scsi/isci/scu_task_context.h new file mode 100644 index 00000000000..7df87d92328 --- /dev/null +++ b/drivers/scsi/isci/scu_task_context.h @@ -0,0 +1,942 @@ +/* + * 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 + * tranmitting 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 block_protection_enable:1; + u32 block_size:2; + u32 block_protection_function: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 intermediate_crc_value:16; + u32 initial_crc_seed:16; + + /* OFFSET 0xD4 */ + u32 application_tag_for_verify:16; + u32 application_tag_for_generate:16; + + /* OFFSET 0xD8 */ + u32 reference_tag_seed_for_verify_function; + + /* OFFSET 0xDC */ + u32 reserved_DC; + + /* OFFSET 0xE0 */ + u32 reserved_E0_0:16; + u32 application_tag_mask_for_generate:16; + + /* OFFSET 0xE4 */ + u32 block_protection_control:16; + u32 application_tag_mask_for_verify:16; + + /* OFFSET 0xE8 */ + u32 block_protection_error:8; + u32 reserved_E8_0:24; + + /* OFFSET 0xEC */ + u32 reference_tag_seed_for_verify; + + /* 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; + +}; + +#endif /* _SCU_TASK_CONTEXT_H_ */ |