/* * 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.
*/
/** * 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. * *
*/ typedefenum {
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. * *
*/ typedefenum {
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_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
/* 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)
/** * * * 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))
/** * * * 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;
/** * 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;
/** * 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;
/** * 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;
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