c72086e3c2
Remove usage of the request substate machine for smp requests identified by: task->task_proto == SAS_PROTOCOL_SMP While merging over the smp_request infrastructure noticed that all the assign buffer implementations are now equal, so moved it to scic_sds_general_request_construct. Reported-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
1585 lines
52 KiB
C
1585 lines
52 KiB
C
/*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* BSD LICENSE
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <scsi/sas.h>
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#include "sas.h"
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#include "state_machine.h"
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#include "remote_device.h"
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#include "stp_request.h"
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#include "unsolicited_frame_control.h"
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#include "scu_completion_codes.h"
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#include "scu_event_codes.h"
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#include "scu_task_context.h"
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#include "request.h"
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/**
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* This method is will fill in the SCU Task Context for any type of SATA
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* request. This is called from the various SATA constructors.
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* @sci_req: The general IO request object which is to be used in
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* constructing the SCU task context.
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* @task_context: The buffer pointer for the SCU task context which is being
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* constructed.
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*
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* The general io request construction is complete. The buffer assignment for
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* the command buffer is complete. none Revisit task context construction to
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* determine what is common for SSP/SMP/STP task context structures.
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*/
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static void scu_sata_reqeust_construct_task_context(
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struct scic_sds_request *sci_req,
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struct scu_task_context *task_context)
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{
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dma_addr_t dma_addr;
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struct scic_sds_controller *controller;
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struct scic_sds_remote_device *target_device;
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struct scic_sds_port *target_port;
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controller = scic_sds_request_get_controller(sci_req);
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target_device = scic_sds_request_get_device(sci_req);
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target_port = scic_sds_request_get_port(sci_req);
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/* Fill in the TC with the its required data */
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task_context->abort = 0;
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task_context->priority = SCU_TASK_PRIORITY_NORMAL;
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task_context->initiator_request = 1;
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task_context->connection_rate = target_device->connection_rate;
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task_context->protocol_engine_index =
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scic_sds_controller_get_protocol_engine_group(controller);
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task_context->logical_port_index =
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scic_sds_port_get_index(target_port);
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task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_STP;
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task_context->valid = SCU_TASK_CONTEXT_VALID;
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task_context->context_type = SCU_TASK_CONTEXT_TYPE;
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task_context->remote_node_index =
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scic_sds_remote_device_get_index(sci_req->target_device);
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task_context->command_code = 0;
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task_context->link_layer_control = 0;
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task_context->do_not_dma_ssp_good_response = 1;
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task_context->strict_ordering = 0;
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task_context->control_frame = 0;
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task_context->timeout_enable = 0;
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task_context->block_guard_enable = 0;
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task_context->address_modifier = 0;
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task_context->task_phase = 0x01;
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task_context->ssp_command_iu_length =
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(sizeof(struct host_to_dev_fis) - sizeof(u32)) / sizeof(u32);
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/* Set the first word of the H2D REG FIS */
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task_context->type.words[0] = *(u32 *)&sci_req->stp.cmd;
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if (sci_req->was_tag_assigned_by_user) {
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/*
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* Build the task context now since we have already read
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* the data
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*/
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sci_req->post_context =
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(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
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(scic_sds_controller_get_protocol_engine_group(
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controller) <<
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SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
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(scic_sds_port_get_index(target_port) <<
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SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) |
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scic_sds_io_tag_get_index(sci_req->io_tag));
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} else {
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/*
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* Build the task context now since we have already read
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* the data.
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* I/O tag index is not assigned because we have to wait
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* until we get a TCi.
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*/
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sci_req->post_context =
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(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
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(scic_sds_controller_get_protocol_engine_group(
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controller) <<
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SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
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(scic_sds_port_get_index(target_port) <<
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SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT));
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}
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/*
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* Copy the physical address for the command buffer to the SCU Task
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* Context. We must offset the command buffer by 4 bytes because the
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* first 4 bytes are transfered in the body of the TC.
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*/
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dma_addr = scic_io_request_get_dma_addr(sci_req,
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((char *) &sci_req->stp.cmd) +
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sizeof(u32));
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task_context->command_iu_upper = upper_32_bits(dma_addr);
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task_context->command_iu_lower = lower_32_bits(dma_addr);
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/* SATA Requests do not have a response buffer */
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task_context->response_iu_upper = 0;
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task_context->response_iu_lower = 0;
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}
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/**
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*
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* @sci_req:
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*
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* This method will perform any general sata request construction. What part of
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* SATA IO request construction is general? none
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*/
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static void scic_sds_stp_non_ncq_request_construct(
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struct scic_sds_request *sci_req)
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{
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sci_req->has_started_substate_machine = true;
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}
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/**
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*
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* @sci_req: This parameter specifies the request to be constructed as an
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* optimized request.
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* @optimized_task_type: This parameter specifies whether the request is to be
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* an UDMA request or a NCQ request. - A value of 0 indicates UDMA. - A
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* value of 1 indicates NCQ.
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*
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* This method will perform request construction common to all types of STP
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* requests that are optimized by the silicon (i.e. UDMA, NCQ). This method
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* returns an indication as to whether the construction was successful.
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*/
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static void scic_sds_stp_optimized_request_construct(struct scic_sds_request *sci_req,
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u8 optimized_task_type,
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u32 len,
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enum dma_data_direction dir)
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{
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struct scu_task_context *task_context = sci_req->task_context_buffer;
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/* Build the STP task context structure */
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scu_sata_reqeust_construct_task_context(sci_req, task_context);
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/* Copy over the SGL elements */
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scic_sds_request_build_sgl(sci_req);
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/* Copy over the number of bytes to be transfered */
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task_context->transfer_length_bytes = len;
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if (dir == DMA_TO_DEVICE) {
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/*
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* The difference between the DMA IN and DMA OUT request task type
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* values are consistent with the difference between FPDMA READ
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* and FPDMA WRITE values. Add the supplied task type parameter
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* to this difference to set the task type properly for this
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* DATA OUT (WRITE) case. */
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task_context->task_type = optimized_task_type + (SCU_TASK_TYPE_DMA_OUT
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- SCU_TASK_TYPE_DMA_IN);
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} else {
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/*
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* For the DATA IN (READ) case, simply save the supplied
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* optimized task type. */
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task_context->task_type = optimized_task_type;
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}
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}
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/**
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*
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* @sci_req: This parameter specifies the request to be constructed.
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*
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* This method will construct the STP UDMA request and its associated TC data.
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* This method returns an indication as to whether the construction was
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* successful. SCI_SUCCESS Currently this method always returns this value.
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*/
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enum sci_status scic_sds_stp_ncq_request_construct(struct scic_sds_request *sci_req,
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u32 len,
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enum dma_data_direction dir)
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{
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scic_sds_stp_optimized_request_construct(sci_req,
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SCU_TASK_TYPE_FPDMAQ_READ,
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len, dir);
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return SCI_SUCCESS;
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}
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/**
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* scu_stp_raw_request_construct_task_context -
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* @sci_req: This parameter specifies the STP request object for which to
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* construct a RAW command frame task context.
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* @task_context: This parameter specifies the SCU specific task context buffer
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* to construct.
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*
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* This method performs the operations common to all SATA/STP requests
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* utilizing the raw frame method. none
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*/
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static void scu_stp_raw_request_construct_task_context(
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struct scic_sds_stp_request *stp_req,
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struct scu_task_context *task_context)
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{
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struct scic_sds_request *sci_req = to_sci_req(stp_req);
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scu_sata_reqeust_construct_task_context(sci_req, task_context);
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task_context->control_frame = 0;
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task_context->priority = SCU_TASK_PRIORITY_NORMAL;
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task_context->task_type = SCU_TASK_TYPE_SATA_RAW_FRAME;
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task_context->type.stp.fis_type = FIS_REGH2D;
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task_context->transfer_length_bytes = sizeof(struct host_to_dev_fis) - sizeof(u32);
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}
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void scic_stp_io_request_set_ncq_tag(
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struct scic_sds_request *req,
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u16 ncq_tag)
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{
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/**
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* @note This could be made to return an error to the user if the user
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* attempts to set the NCQ tag in the wrong state.
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*/
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req->task_context_buffer->type.stp.ncq_tag = ncq_tag;
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}
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/**
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*
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* @sci_req:
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*
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* Get the next SGL element from the request. - Check on which SGL element pair
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* we are working - if working on SLG pair element A - advance to element B -
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* else - check to see if there are more SGL element pairs for this IO request
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* - if there are more SGL element pairs - advance to the next pair and return
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* element A struct scu_sgl_element*
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*/
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static struct scu_sgl_element *scic_sds_stp_request_pio_get_next_sgl(struct scic_sds_stp_request *stp_req)
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{
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struct scu_sgl_element *current_sgl;
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struct scic_sds_request *sci_req = to_sci_req(stp_req);
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struct scic_sds_request_pio_sgl *pio_sgl = &stp_req->type.pio.request_current;
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if (pio_sgl->sgl_set == SCU_SGL_ELEMENT_PAIR_A) {
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if (pio_sgl->sgl_pair->B.address_lower == 0 &&
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pio_sgl->sgl_pair->B.address_upper == 0) {
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current_sgl = NULL;
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} else {
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pio_sgl->sgl_set = SCU_SGL_ELEMENT_PAIR_B;
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current_sgl = &pio_sgl->sgl_pair->B;
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}
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} else {
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if (pio_sgl->sgl_pair->next_pair_lower == 0 &&
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pio_sgl->sgl_pair->next_pair_upper == 0) {
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current_sgl = NULL;
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} else {
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u64 phys_addr;
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phys_addr = pio_sgl->sgl_pair->next_pair_upper;
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phys_addr <<= 32;
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phys_addr |= pio_sgl->sgl_pair->next_pair_lower;
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pio_sgl->sgl_pair = scic_request_get_virt_addr(sci_req, phys_addr);
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pio_sgl->sgl_set = SCU_SGL_ELEMENT_PAIR_A;
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current_sgl = &pio_sgl->sgl_pair->A;
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}
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}
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return current_sgl;
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}
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/**
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*
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* @sci_req:
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* @completion_code:
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*
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* This method processes a TC completion. The expected TC completion is for
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* the transmission of the H2D register FIS containing the SATA/STP non-data
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* request. This method always successfully processes the TC completion.
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* SCI_SUCCESS This value is always returned.
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*/
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static enum sci_status scic_sds_stp_request_non_data_await_h2d_tc_completion_handler(
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struct scic_sds_request *sci_req,
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u32 completion_code)
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{
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switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
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case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD):
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scic_sds_request_set_status(
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sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS
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);
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sci_base_state_machine_change_state(
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&sci_req->started_substate_machine,
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SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE
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);
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break;
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default:
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/*
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* All other completion status cause the IO to be complete. If a NAK
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* was received, then it is up to the user to retry the request. */
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scic_sds_request_set_status(
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sci_req,
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SCU_NORMALIZE_COMPLETION_STATUS(completion_code),
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SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR
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);
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sci_base_state_machine_change_state(
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&sci_req->state_machine, SCI_BASE_REQUEST_STATE_COMPLETED);
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break;
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}
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return SCI_SUCCESS;
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}
|
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|
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/**
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*
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* @request: This parameter specifies the request for which a frame has been
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* received.
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* @frame_index: This parameter specifies the index of the frame that has been
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* received.
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*
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* This method processes frames received from the target while waiting for a
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* device to host register FIS. If a non-register FIS is received during this
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* time, it is treated as a protocol violation from an IO perspective. Indicate
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* if the received frame was processed successfully.
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*/
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static enum sci_status scic_sds_stp_request_non_data_await_d2h_frame_handler(
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struct scic_sds_request *sci_req,
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u32 frame_index)
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{
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enum sci_status status;
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struct dev_to_host_fis *frame_header;
|
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u32 *frame_buffer;
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struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
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struct scic_sds_controller *scic = sci_req->owning_controller;
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|
|
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status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,
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frame_index,
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(void **)&frame_header);
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|
|
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if (status != SCI_SUCCESS) {
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dev_err(scic_to_dev(sci_req->owning_controller),
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"%s: SCIC IO Request 0x%p could not get frame header "
|
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"for frame index %d, status %x\n",
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__func__, stp_req, frame_index, status);
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|
|
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return status;
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}
|
|
|
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switch (frame_header->fis_type) {
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case FIS_REGD2H:
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scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
|
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frame_index,
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(void **)&frame_buffer);
|
|
|
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scic_sds_controller_copy_sata_response(&sci_req->stp.rsp,
|
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frame_header,
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frame_buffer);
|
|
|
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/* The command has completed with error */
|
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scic_sds_request_set_status(sci_req, SCU_TASK_DONE_CHECK_RESPONSE,
|
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SCI_FAILURE_IO_RESPONSE_VALID);
|
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break;
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|
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default:
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dev_warn(scic_to_dev(scic),
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"%s: IO Request:0x%p Frame Id:%d protocol "
|
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"violation occurred\n", __func__, stp_req,
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frame_index);
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|
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scic_sds_request_set_status(sci_req, SCU_TASK_DONE_UNEXP_FIS,
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SCI_FAILURE_PROTOCOL_VIOLATION);
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break;
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}
|
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|
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sci_base_state_machine_change_state(&sci_req->state_machine,
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SCI_BASE_REQUEST_STATE_COMPLETED);
|
|
|
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/* Frame has been decoded return it to the controller */
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scic_sds_controller_release_frame(scic, frame_index);
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|
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return status;
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}
|
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|
|
/* --------------------------------------------------------------------------- */
|
|
|
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static const struct scic_sds_io_request_state_handler scic_sds_stp_request_started_non_data_substate_handler_table[] = {
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[SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_H2D_COMPLETION_SUBSTATE] = {
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.abort_handler = scic_sds_request_started_state_abort_handler,
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.tc_completion_handler = scic_sds_stp_request_non_data_await_h2d_tc_completion_handler,
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},
|
|
[SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE] = {
|
|
.abort_handler = scic_sds_request_started_state_abort_handler,
|
|
.frame_handler = scic_sds_stp_request_non_data_await_d2h_frame_handler,
|
|
}
|
|
};
|
|
|
|
static void scic_sds_stp_request_started_non_data_await_h2d_completion_enter(
|
|
void *object)
|
|
{
|
|
struct scic_sds_request *sci_req = object;
|
|
|
|
SET_STATE_HANDLER(
|
|
sci_req,
|
|
scic_sds_stp_request_started_non_data_substate_handler_table,
|
|
SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_H2D_COMPLETION_SUBSTATE
|
|
);
|
|
|
|
scic_sds_remote_device_set_working_request(
|
|
sci_req->target_device, sci_req
|
|
);
|
|
}
|
|
|
|
static void scic_sds_stp_request_started_non_data_await_d2h_enter(void *object)
|
|
{
|
|
struct scic_sds_request *sci_req = object;
|
|
|
|
SET_STATE_HANDLER(
|
|
sci_req,
|
|
scic_sds_stp_request_started_non_data_substate_handler_table,
|
|
SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE
|
|
);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------- */
|
|
|
|
static const struct sci_base_state scic_sds_stp_request_started_non_data_substate_table[] = {
|
|
[SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_H2D_COMPLETION_SUBSTATE] = {
|
|
.enter_state = scic_sds_stp_request_started_non_data_await_h2d_completion_enter,
|
|
},
|
|
[SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE] = {
|
|
.enter_state = scic_sds_stp_request_started_non_data_await_d2h_enter,
|
|
},
|
|
};
|
|
|
|
enum sci_status scic_sds_stp_non_data_request_construct(struct scic_sds_request *sci_req)
|
|
{
|
|
struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
|
|
|
|
scic_sds_stp_non_ncq_request_construct(sci_req);
|
|
|
|
/* Build the STP task context structure */
|
|
scu_stp_raw_request_construct_task_context(stp_req, sci_req->task_context_buffer);
|
|
|
|
sci_base_state_machine_construct(&sci_req->started_substate_machine,
|
|
sci_req,
|
|
scic_sds_stp_request_started_non_data_substate_table,
|
|
SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_H2D_COMPLETION_SUBSTATE);
|
|
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
#define SCU_MAX_FRAME_BUFFER_SIZE 0x400 /* 1K is the maximum SCU frame data payload */
|
|
|
|
/* transmit DATA_FIS from (current sgl + offset) for input
|
|
* parameter length. current sgl and offset is alreay stored in the IO request
|
|
*/
|
|
static enum sci_status scic_sds_stp_request_pio_data_out_trasmit_data_frame(
|
|
struct scic_sds_request *sci_req,
|
|
u32 length)
|
|
{
|
|
struct scic_sds_controller *scic = sci_req->owning_controller;
|
|
struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
|
|
struct scu_task_context *task_context;
|
|
struct scu_sgl_element *current_sgl;
|
|
|
|
/* Recycle the TC and reconstruct it for sending out DATA FIS containing
|
|
* for the data from current_sgl+offset for the input length
|
|
*/
|
|
task_context = scic_sds_controller_get_task_context_buffer(scic,
|
|
sci_req->io_tag);
|
|
|
|
if (stp_req->type.pio.request_current.sgl_set == SCU_SGL_ELEMENT_PAIR_A)
|
|
current_sgl = &stp_req->type.pio.request_current.sgl_pair->A;
|
|
else
|
|
current_sgl = &stp_req->type.pio.request_current.sgl_pair->B;
|
|
|
|
/* update the TC */
|
|
task_context->command_iu_upper = current_sgl->address_upper;
|
|
task_context->command_iu_lower = current_sgl->address_lower;
|
|
task_context->transfer_length_bytes = length;
|
|
task_context->type.stp.fis_type = FIS_DATA;
|
|
|
|
/* send the new TC out. */
|
|
return scic_controller_continue_io(sci_req);
|
|
}
|
|
|
|
static enum sci_status scic_sds_stp_request_pio_data_out_transmit_data(struct scic_sds_request *sci_req)
|
|
{
|
|
|
|
struct scu_sgl_element *current_sgl;
|
|
u32 sgl_offset;
|
|
u32 remaining_bytes_in_current_sgl = 0;
|
|
enum sci_status status = SCI_SUCCESS;
|
|
struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
|
|
|
|
sgl_offset = stp_req->type.pio.request_current.sgl_offset;
|
|
|
|
if (stp_req->type.pio.request_current.sgl_set == SCU_SGL_ELEMENT_PAIR_A) {
|
|
current_sgl = &(stp_req->type.pio.request_current.sgl_pair->A);
|
|
remaining_bytes_in_current_sgl = stp_req->type.pio.request_current.sgl_pair->A.length - sgl_offset;
|
|
} else {
|
|
current_sgl = &(stp_req->type.pio.request_current.sgl_pair->B);
|
|
remaining_bytes_in_current_sgl = stp_req->type.pio.request_current.sgl_pair->B.length - sgl_offset;
|
|
}
|
|
|
|
|
|
if (stp_req->type.pio.pio_transfer_bytes > 0) {
|
|
if (stp_req->type.pio.pio_transfer_bytes >= remaining_bytes_in_current_sgl) {
|
|
/* recycle the TC and send the H2D Data FIS from (current sgl + sgl_offset) and length = remaining_bytes_in_current_sgl */
|
|
status = scic_sds_stp_request_pio_data_out_trasmit_data_frame(sci_req, remaining_bytes_in_current_sgl);
|
|
if (status == SCI_SUCCESS) {
|
|
stp_req->type.pio.pio_transfer_bytes -= remaining_bytes_in_current_sgl;
|
|
|
|
/* update the current sgl, sgl_offset and save for future */
|
|
current_sgl = scic_sds_stp_request_pio_get_next_sgl(stp_req);
|
|
sgl_offset = 0;
|
|
}
|
|
} else if (stp_req->type.pio.pio_transfer_bytes < remaining_bytes_in_current_sgl) {
|
|
/* recycle the TC and send the H2D Data FIS from (current sgl + sgl_offset) and length = type.pio.pio_transfer_bytes */
|
|
scic_sds_stp_request_pio_data_out_trasmit_data_frame(sci_req, stp_req->type.pio.pio_transfer_bytes);
|
|
|
|
if (status == SCI_SUCCESS) {
|
|
/* Sgl offset will be adjusted and saved for future */
|
|
sgl_offset += stp_req->type.pio.pio_transfer_bytes;
|
|
current_sgl->address_lower += stp_req->type.pio.pio_transfer_bytes;
|
|
stp_req->type.pio.pio_transfer_bytes = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (status == SCI_SUCCESS) {
|
|
stp_req->type.pio.request_current.sgl_offset = sgl_offset;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @stp_request: The request that is used for the SGL processing.
|
|
* @data_buffer: The buffer of data to be copied.
|
|
* @length: The length of the data transfer.
|
|
*
|
|
* Copy the data from the buffer for the length specified to the IO reqeust SGL
|
|
* specified data region. enum sci_status
|
|
*/
|
|
static enum sci_status
|
|
scic_sds_stp_request_pio_data_in_copy_data_buffer(struct scic_sds_stp_request *stp_req,
|
|
u8 *data_buf, u32 len)
|
|
{
|
|
struct scic_sds_request *sci_req;
|
|
struct isci_request *ireq;
|
|
u8 *src_addr;
|
|
int copy_len;
|
|
struct sas_task *task;
|
|
struct scatterlist *sg;
|
|
void *kaddr;
|
|
int total_len = len;
|
|
|
|
sci_req = to_sci_req(stp_req);
|
|
ireq = sci_req_to_ireq(sci_req);
|
|
task = isci_request_access_task(ireq);
|
|
src_addr = data_buf;
|
|
|
|
if (task->num_scatter > 0) {
|
|
sg = task->scatter;
|
|
|
|
while (total_len > 0) {
|
|
struct page *page = sg_page(sg);
|
|
|
|
copy_len = min_t(int, total_len, sg_dma_len(sg));
|
|
kaddr = kmap_atomic(page, KM_IRQ0);
|
|
memcpy(kaddr + sg->offset, src_addr, copy_len);
|
|
kunmap_atomic(kaddr, KM_IRQ0);
|
|
total_len -= copy_len;
|
|
src_addr += copy_len;
|
|
sg = sg_next(sg);
|
|
}
|
|
} else {
|
|
BUG_ON(task->total_xfer_len < total_len);
|
|
memcpy(task->scatter, src_addr, total_len);
|
|
}
|
|
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @sci_req: The PIO DATA IN request that is to receive the data.
|
|
* @data_buffer: The buffer to copy from.
|
|
*
|
|
* Copy the data buffer to the io request data region. enum sci_status
|
|
*/
|
|
static enum sci_status scic_sds_stp_request_pio_data_in_copy_data(
|
|
struct scic_sds_stp_request *sci_req,
|
|
u8 *data_buffer)
|
|
{
|
|
enum sci_status status;
|
|
|
|
/*
|
|
* If there is less than 1K remaining in the transfer request
|
|
* copy just the data for the transfer */
|
|
if (sci_req->type.pio.pio_transfer_bytes < SCU_MAX_FRAME_BUFFER_SIZE) {
|
|
status = scic_sds_stp_request_pio_data_in_copy_data_buffer(
|
|
sci_req, data_buffer, sci_req->type.pio.pio_transfer_bytes);
|
|
|
|
if (status == SCI_SUCCESS)
|
|
sci_req->type.pio.pio_transfer_bytes = 0;
|
|
} else {
|
|
/* We are transfering the whole frame so copy */
|
|
status = scic_sds_stp_request_pio_data_in_copy_data_buffer(
|
|
sci_req, data_buffer, SCU_MAX_FRAME_BUFFER_SIZE);
|
|
|
|
if (status == SCI_SUCCESS)
|
|
sci_req->type.pio.pio_transfer_bytes -= SCU_MAX_FRAME_BUFFER_SIZE;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @sci_req:
|
|
* @completion_code:
|
|
*
|
|
* enum sci_status
|
|
*/
|
|
static enum sci_status scic_sds_stp_request_pio_await_h2d_completion_tc_completion_handler(
|
|
struct scic_sds_request *sci_req,
|
|
u32 completion_code)
|
|
{
|
|
enum sci_status status = SCI_SUCCESS;
|
|
|
|
switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
|
|
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD):
|
|
scic_sds_request_set_status(
|
|
sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS
|
|
);
|
|
|
|
sci_base_state_machine_change_state(
|
|
&sci_req->started_substate_machine,
|
|
SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE
|
|
);
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* All other completion status cause the IO to be complete. If a NAK
|
|
* was received, then it is up to the user to retry the request. */
|
|
scic_sds_request_set_status(
|
|
sci_req,
|
|
SCU_NORMALIZE_COMPLETION_STATUS(completion_code),
|
|
SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR
|
|
);
|
|
|
|
sci_base_state_machine_change_state(
|
|
&sci_req->state_machine,
|
|
SCI_BASE_REQUEST_STATE_COMPLETED
|
|
);
|
|
break;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
static enum sci_status scic_sds_stp_request_pio_await_frame_frame_handler(struct scic_sds_request *sci_req,
|
|
u32 frame_index)
|
|
{
|
|
struct scic_sds_controller *scic = sci_req->owning_controller;
|
|
struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
|
|
struct isci_request *ireq = sci_req_to_ireq(sci_req);
|
|
struct sas_task *task = isci_request_access_task(ireq);
|
|
struct dev_to_host_fis *frame_header;
|
|
enum sci_status status;
|
|
u32 *frame_buffer;
|
|
|
|
status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,
|
|
frame_index,
|
|
(void **)&frame_header);
|
|
|
|
if (status != SCI_SUCCESS) {
|
|
dev_err(scic_to_dev(scic),
|
|
"%s: SCIC IO Request 0x%p could not get frame header "
|
|
"for frame index %d, status %x\n",
|
|
__func__, stp_req, frame_index, status);
|
|
return status;
|
|
}
|
|
|
|
switch (frame_header->fis_type) {
|
|
case FIS_PIO_SETUP:
|
|
/* Get from the frame buffer the PIO Setup Data */
|
|
scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
|
|
frame_index,
|
|
(void **)&frame_buffer);
|
|
|
|
/* Get the data from the PIO Setup The SCU Hardware returns
|
|
* first word in the frame_header and the rest of the data is in
|
|
* the frame buffer so we need to back up one dword
|
|
*/
|
|
|
|
/* transfer_count: first 16bits in the 4th dword */
|
|
stp_req->type.pio.pio_transfer_bytes = frame_buffer[3] & 0xffff;
|
|
|
|
/* ending_status: 4th byte in the 3rd dword */
|
|
stp_req->type.pio.ending_status = (frame_buffer[2] >> 24) & 0xff;
|
|
|
|
scic_sds_controller_copy_sata_response(&sci_req->stp.rsp,
|
|
frame_header,
|
|
frame_buffer);
|
|
|
|
sci_req->stp.rsp.status = stp_req->type.pio.ending_status;
|
|
|
|
/* The next state is dependent on whether the
|
|
* request was PIO Data-in or Data out
|
|
*/
|
|
if (task->data_dir == DMA_FROM_DEVICE) {
|
|
sci_base_state_machine_change_state(&sci_req->started_substate_machine,
|
|
SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE);
|
|
} else if (task->data_dir == DMA_TO_DEVICE) {
|
|
/* Transmit data */
|
|
status = scic_sds_stp_request_pio_data_out_transmit_data(sci_req);
|
|
if (status != SCI_SUCCESS)
|
|
break;
|
|
sci_base_state_machine_change_state(&sci_req->started_substate_machine,
|
|
SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE);
|
|
}
|
|
break;
|
|
case FIS_SETDEVBITS:
|
|
sci_base_state_machine_change_state(&sci_req->started_substate_machine,
|
|
SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE);
|
|
break;
|
|
case FIS_REGD2H:
|
|
if (frame_header->status & ATA_BUSY) {
|
|
/* Now why is the drive sending a D2H Register FIS when
|
|
* it is still busy? Do nothing since we are still in
|
|
* the right state.
|
|
*/
|
|
dev_dbg(scic_to_dev(scic),
|
|
"%s: SCIC PIO Request 0x%p received "
|
|
"D2H Register FIS with BSY status "
|
|
"0x%x\n", __func__, stp_req,
|
|
frame_header->status);
|
|
break;
|
|
}
|
|
|
|
scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
|
|
frame_index,
|
|
(void **)&frame_buffer);
|
|
|
|
scic_sds_controller_copy_sata_response(&sci_req->stp.req,
|
|
frame_header,
|
|
frame_buffer);
|
|
|
|
scic_sds_request_set_status(sci_req,
|
|
SCU_TASK_DONE_CHECK_RESPONSE,
|
|
SCI_FAILURE_IO_RESPONSE_VALID);
|
|
|
|
sci_base_state_machine_change_state(&sci_req->state_machine,
|
|
SCI_BASE_REQUEST_STATE_COMPLETED);
|
|
break;
|
|
default:
|
|
/* FIXME: what do we do here? */
|
|
break;
|
|
}
|
|
|
|
/* Frame is decoded return it to the controller */
|
|
scic_sds_controller_release_frame(scic, frame_index);
|
|
|
|
return status;
|
|
}
|
|
|
|
static enum sci_status scic_sds_stp_request_pio_data_in_await_data_frame_handler(struct scic_sds_request *sci_req,
|
|
u32 frame_index)
|
|
{
|
|
enum sci_status status;
|
|
struct dev_to_host_fis *frame_header;
|
|
struct sata_fis_data *frame_buffer;
|
|
struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
|
|
struct scic_sds_controller *scic = sci_req->owning_controller;
|
|
|
|
status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,
|
|
frame_index,
|
|
(void **)&frame_header);
|
|
|
|
if (status != SCI_SUCCESS) {
|
|
dev_err(scic_to_dev(scic),
|
|
"%s: SCIC IO Request 0x%p could not get frame header "
|
|
"for frame index %d, status %x\n",
|
|
__func__, stp_req, frame_index, status);
|
|
return status;
|
|
}
|
|
|
|
if (frame_header->fis_type == FIS_DATA) {
|
|
if (stp_req->type.pio.request_current.sgl_pair == NULL) {
|
|
sci_req->saved_rx_frame_index = frame_index;
|
|
stp_req->type.pio.pio_transfer_bytes = 0;
|
|
} else {
|
|
scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
|
|
frame_index,
|
|
(void **)&frame_buffer);
|
|
|
|
status = scic_sds_stp_request_pio_data_in_copy_data(stp_req,
|
|
(u8 *)frame_buffer);
|
|
|
|
/* Frame is decoded return it to the controller */
|
|
scic_sds_controller_release_frame(scic, frame_index);
|
|
}
|
|
|
|
/* Check for the end of the transfer, are there more
|
|
* bytes remaining for this data transfer
|
|
*/
|
|
if (status != SCI_SUCCESS ||
|
|
stp_req->type.pio.pio_transfer_bytes != 0)
|
|
return status;
|
|
|
|
if ((stp_req->type.pio.ending_status & ATA_BUSY) == 0) {
|
|
scic_sds_request_set_status(sci_req,
|
|
SCU_TASK_DONE_CHECK_RESPONSE,
|
|
SCI_FAILURE_IO_RESPONSE_VALID);
|
|
|
|
sci_base_state_machine_change_state(&sci_req->state_machine,
|
|
SCI_BASE_REQUEST_STATE_COMPLETED);
|
|
} else {
|
|
sci_base_state_machine_change_state(&sci_req->started_substate_machine,
|
|
SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE);
|
|
}
|
|
} else {
|
|
dev_err(scic_to_dev(scic),
|
|
"%s: SCIC PIO Request 0x%p received frame %d "
|
|
"with fis type 0x%02x when expecting a data "
|
|
"fis.\n", __func__, stp_req, frame_index,
|
|
frame_header->fis_type);
|
|
|
|
scic_sds_request_set_status(sci_req,
|
|
SCU_TASK_DONE_GOOD,
|
|
SCI_FAILURE_IO_REQUIRES_SCSI_ABORT);
|
|
|
|
sci_base_state_machine_change_state(&sci_req->state_machine,
|
|
SCI_BASE_REQUEST_STATE_COMPLETED);
|
|
|
|
/* Frame is decoded return it to the controller */
|
|
scic_sds_controller_release_frame(scic, frame_index);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
|
|
/**
|
|
*
|
|
* @sci_req:
|
|
* @completion_code:
|
|
*
|
|
* enum sci_status
|
|
*/
|
|
static enum sci_status scic_sds_stp_request_pio_data_out_await_data_transmit_completion_tc_completion_handler(
|
|
|
|
struct scic_sds_request *sci_req,
|
|
u32 completion_code)
|
|
{
|
|
enum sci_status status = SCI_SUCCESS;
|
|
bool all_frames_transferred = false;
|
|
struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
|
|
|
|
switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
|
|
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD):
|
|
/* Transmit data */
|
|
if (stp_req->type.pio.pio_transfer_bytes != 0) {
|
|
status = scic_sds_stp_request_pio_data_out_transmit_data(sci_req);
|
|
if (status == SCI_SUCCESS) {
|
|
if (stp_req->type.pio.pio_transfer_bytes == 0)
|
|
all_frames_transferred = true;
|
|
}
|
|
} else if (stp_req->type.pio.pio_transfer_bytes == 0) {
|
|
/*
|
|
* this will happen if the all data is written at the
|
|
* first time after the pio setup fis is received
|
|
*/
|
|
all_frames_transferred = true;
|
|
}
|
|
|
|
/* all data transferred. */
|
|
if (all_frames_transferred) {
|
|
/*
|
|
* Change the state to SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_FRAME_SUBSTATE
|
|
* and wait for PIO_SETUP fis / or D2H REg fis. */
|
|
sci_base_state_machine_change_state(
|
|
&sci_req->started_substate_machine,
|
|
SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE
|
|
);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* All other completion status cause the IO to be complete. If a NAK
|
|
* was received, then it is up to the user to retry the request. */
|
|
scic_sds_request_set_status(
|
|
sci_req,
|
|
SCU_NORMALIZE_COMPLETION_STATUS(completion_code),
|
|
SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR
|
|
);
|
|
|
|
sci_base_state_machine_change_state(
|
|
&sci_req->state_machine,
|
|
SCI_BASE_REQUEST_STATE_COMPLETED
|
|
);
|
|
break;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @request: This is the request which is receiving the event.
|
|
* @event_code: This is the event code that the request on which the request is
|
|
* expected to take action.
|
|
*
|
|
* This method will handle any link layer events while waiting for the data
|
|
* frame. enum sci_status SCI_SUCCESS SCI_FAILURE
|
|
*/
|
|
static enum sci_status scic_sds_stp_request_pio_data_in_await_data_event_handler(
|
|
struct scic_sds_request *request,
|
|
u32 event_code)
|
|
{
|
|
enum sci_status status;
|
|
|
|
switch (scu_get_event_specifier(event_code)) {
|
|
case SCU_TASK_DONE_CRC_ERR << SCU_EVENT_SPECIFIC_CODE_SHIFT:
|
|
/*
|
|
* We are waiting for data and the SCU has R_ERR the data frame.
|
|
* Go back to waiting for the D2H Register FIS */
|
|
sci_base_state_machine_change_state(
|
|
&request->started_substate_machine,
|
|
SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE
|
|
);
|
|
|
|
status = SCI_SUCCESS;
|
|
break;
|
|
|
|
default:
|
|
dev_err(scic_to_dev(request->owning_controller),
|
|
"%s: SCIC PIO Request 0x%p received unexpected "
|
|
"event 0x%08x\n",
|
|
__func__, request, event_code);
|
|
|
|
/* / @todo Should we fail the PIO request when we get an unexpected event? */
|
|
status = SCI_FAILURE;
|
|
break;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------- */
|
|
|
|
static const struct scic_sds_io_request_state_handler scic_sds_stp_request_started_pio_substate_handler_table[] = {
|
|
[SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_H2D_COMPLETION_SUBSTATE] = {
|
|
.abort_handler = scic_sds_request_started_state_abort_handler,
|
|
.tc_completion_handler = scic_sds_stp_request_pio_await_h2d_completion_tc_completion_handler,
|
|
},
|
|
[SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE] = {
|
|
.abort_handler = scic_sds_request_started_state_abort_handler,
|
|
.frame_handler = scic_sds_stp_request_pio_await_frame_frame_handler
|
|
},
|
|
[SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE] = {
|
|
.abort_handler = scic_sds_request_started_state_abort_handler,
|
|
.event_handler = scic_sds_stp_request_pio_data_in_await_data_event_handler,
|
|
.frame_handler = scic_sds_stp_request_pio_data_in_await_data_frame_handler
|
|
},
|
|
[SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE] = {
|
|
.abort_handler = scic_sds_request_started_state_abort_handler,
|
|
.tc_completion_handler = scic_sds_stp_request_pio_data_out_await_data_transmit_completion_tc_completion_handler,
|
|
}
|
|
};
|
|
|
|
static void scic_sds_stp_request_started_pio_await_h2d_completion_enter(
|
|
void *object)
|
|
{
|
|
struct scic_sds_request *sci_req = object;
|
|
|
|
SET_STATE_HANDLER(
|
|
sci_req,
|
|
scic_sds_stp_request_started_pio_substate_handler_table,
|
|
SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_H2D_COMPLETION_SUBSTATE
|
|
);
|
|
|
|
scic_sds_remote_device_set_working_request(
|
|
sci_req->target_device, sci_req);
|
|
}
|
|
|
|
static void scic_sds_stp_request_started_pio_await_frame_enter(void *object)
|
|
{
|
|
struct scic_sds_request *sci_req = object;
|
|
|
|
SET_STATE_HANDLER(
|
|
sci_req,
|
|
scic_sds_stp_request_started_pio_substate_handler_table,
|
|
SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE
|
|
);
|
|
}
|
|
|
|
static void scic_sds_stp_request_started_pio_data_in_await_data_enter(
|
|
void *object)
|
|
{
|
|
struct scic_sds_request *sci_req = object;
|
|
|
|
SET_STATE_HANDLER(
|
|
sci_req,
|
|
scic_sds_stp_request_started_pio_substate_handler_table,
|
|
SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE
|
|
);
|
|
}
|
|
|
|
static void scic_sds_stp_request_started_pio_data_out_transmit_data_enter(
|
|
void *object)
|
|
{
|
|
struct scic_sds_request *sci_req = object;
|
|
|
|
SET_STATE_HANDLER(
|
|
sci_req,
|
|
scic_sds_stp_request_started_pio_substate_handler_table,
|
|
SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE
|
|
);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------- */
|
|
|
|
static const struct sci_base_state scic_sds_stp_request_started_pio_substate_table[] = {
|
|
[SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_H2D_COMPLETION_SUBSTATE] = {
|
|
.enter_state = scic_sds_stp_request_started_pio_await_h2d_completion_enter,
|
|
},
|
|
[SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE] = {
|
|
.enter_state = scic_sds_stp_request_started_pio_await_frame_enter,
|
|
},
|
|
[SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE] = {
|
|
.enter_state = scic_sds_stp_request_started_pio_data_in_await_data_enter,
|
|
},
|
|
[SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE] = {
|
|
.enter_state = scic_sds_stp_request_started_pio_data_out_transmit_data_enter,
|
|
}
|
|
};
|
|
|
|
enum sci_status
|
|
scic_sds_stp_pio_request_construct(struct scic_sds_request *sci_req,
|
|
bool copy_rx_frame)
|
|
{
|
|
struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
|
|
struct scic_sds_stp_pio_request *pio = &stp_req->type.pio;
|
|
|
|
scic_sds_stp_non_ncq_request_construct(sci_req);
|
|
|
|
scu_stp_raw_request_construct_task_context(stp_req,
|
|
sci_req->task_context_buffer);
|
|
|
|
pio->current_transfer_bytes = 0;
|
|
pio->ending_error = 0;
|
|
pio->ending_status = 0;
|
|
|
|
pio->request_current.sgl_offset = 0;
|
|
pio->request_current.sgl_set = SCU_SGL_ELEMENT_PAIR_A;
|
|
|
|
if (copy_rx_frame) {
|
|
scic_sds_request_build_sgl(sci_req);
|
|
/* Since the IO request copy of the TC contains the same data as
|
|
* the actual TC this pointer is vaild for either.
|
|
*/
|
|
pio->request_current.sgl_pair = &sci_req->task_context_buffer->sgl_pair_ab;
|
|
} else {
|
|
/* The user does not want the data copied to the SGL buffer location */
|
|
pio->request_current.sgl_pair = NULL;
|
|
}
|
|
|
|
sci_base_state_machine_construct(&sci_req->started_substate_machine,
|
|
sci_req,
|
|
scic_sds_stp_request_started_pio_substate_table,
|
|
SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_H2D_COMPLETION_SUBSTATE);
|
|
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
static void scic_sds_stp_request_udma_complete_request(
|
|
struct scic_sds_request *request,
|
|
u32 scu_status,
|
|
enum sci_status sci_status)
|
|
{
|
|
scic_sds_request_set_status(request, scu_status, sci_status);
|
|
sci_base_state_machine_change_state(&request->state_machine,
|
|
SCI_BASE_REQUEST_STATE_COMPLETED);
|
|
}
|
|
|
|
static enum sci_status scic_sds_stp_request_udma_general_frame_handler(struct scic_sds_request *sci_req,
|
|
u32 frame_index)
|
|
{
|
|
struct scic_sds_controller *scic = sci_req->owning_controller;
|
|
struct dev_to_host_fis *frame_header;
|
|
enum sci_status status;
|
|
u32 *frame_buffer;
|
|
|
|
status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,
|
|
frame_index,
|
|
(void **)&frame_header);
|
|
|
|
if ((status == SCI_SUCCESS) &&
|
|
(frame_header->fis_type == FIS_REGD2H)) {
|
|
scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
|
|
frame_index,
|
|
(void **)&frame_buffer);
|
|
|
|
scic_sds_controller_copy_sata_response(&sci_req->stp.rsp,
|
|
frame_header,
|
|
frame_buffer);
|
|
}
|
|
|
|
scic_sds_controller_release_frame(scic, frame_index);
|
|
|
|
return status;
|
|
}
|
|
|
|
static enum sci_status scic_sds_stp_request_udma_await_tc_completion_tc_completion_handler(
|
|
struct scic_sds_request *sci_req,
|
|
u32 completion_code)
|
|
{
|
|
enum sci_status status = SCI_SUCCESS;
|
|
|
|
switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
|
|
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD):
|
|
scic_sds_stp_request_udma_complete_request(sci_req,
|
|
SCU_TASK_DONE_GOOD,
|
|
SCI_SUCCESS);
|
|
break;
|
|
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_FIS):
|
|
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_REG_ERR):
|
|
/*
|
|
* We must check ther response buffer to see if the D2H Register FIS was
|
|
* received before we got the TC completion. */
|
|
if (sci_req->stp.rsp.fis_type == FIS_REGD2H) {
|
|
scic_sds_remote_device_suspend(sci_req->target_device,
|
|
SCU_EVENT_SPECIFIC(SCU_NORMALIZE_COMPLETION_STATUS(completion_code)));
|
|
|
|
scic_sds_stp_request_udma_complete_request(sci_req,
|
|
SCU_TASK_DONE_CHECK_RESPONSE,
|
|
SCI_FAILURE_IO_RESPONSE_VALID);
|
|
} else {
|
|
/*
|
|
* If we have an error completion status for the TC then we can expect a
|
|
* D2H register FIS from the device so we must change state to wait for it */
|
|
sci_base_state_machine_change_state(&sci_req->started_substate_machine,
|
|
SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE);
|
|
}
|
|
break;
|
|
|
|
/*
|
|
* / @todo Check to see if any of these completion status need to wait for
|
|
* / the device to host register fis. */
|
|
/* / @todo We can retry the command for SCU_TASK_DONE_CMD_LL_R_ERR - this comes only for B0 */
|
|
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_INV_FIS_LEN):
|
|
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_MAX_PLD_ERR):
|
|
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LL_R_ERR):
|
|
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_CMD_LL_R_ERR):
|
|
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_CRC_ERR):
|
|
scic_sds_remote_device_suspend(sci_req->target_device,
|
|
SCU_EVENT_SPECIFIC(SCU_NORMALIZE_COMPLETION_STATUS(completion_code)));
|
|
/* Fall through to the default case */
|
|
default:
|
|
/* All other completion status cause the IO to be complete. */
|
|
scic_sds_stp_request_udma_complete_request(sci_req,
|
|
SCU_NORMALIZE_COMPLETION_STATUS(completion_code),
|
|
SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR);
|
|
break;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
static enum sci_status scic_sds_stp_request_udma_await_d2h_reg_fis_frame_handler(
|
|
struct scic_sds_request *sci_req,
|
|
u32 frame_index)
|
|
{
|
|
enum sci_status status;
|
|
|
|
/* Use the general frame handler to copy the resposne data */
|
|
status = scic_sds_stp_request_udma_general_frame_handler(sci_req, frame_index);
|
|
|
|
if (status != SCI_SUCCESS)
|
|
return status;
|
|
|
|
scic_sds_stp_request_udma_complete_request(sci_req,
|
|
SCU_TASK_DONE_CHECK_RESPONSE,
|
|
SCI_FAILURE_IO_RESPONSE_VALID);
|
|
|
|
return status;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------- */
|
|
|
|
static const struct scic_sds_io_request_state_handler scic_sds_stp_request_started_udma_substate_handler_table[] = {
|
|
[SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_TC_COMPLETION_SUBSTATE] = {
|
|
.abort_handler = scic_sds_request_started_state_abort_handler,
|
|
.tc_completion_handler = scic_sds_stp_request_udma_await_tc_completion_tc_completion_handler,
|
|
.frame_handler = scic_sds_stp_request_udma_general_frame_handler,
|
|
},
|
|
[SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE] = {
|
|
.abort_handler = scic_sds_request_started_state_abort_handler,
|
|
.frame_handler = scic_sds_stp_request_udma_await_d2h_reg_fis_frame_handler,
|
|
},
|
|
};
|
|
|
|
static void scic_sds_stp_request_started_udma_await_tc_completion_enter(
|
|
void *object)
|
|
{
|
|
struct scic_sds_request *sci_req = object;
|
|
|
|
SET_STATE_HANDLER(
|
|
sci_req,
|
|
scic_sds_stp_request_started_udma_substate_handler_table,
|
|
SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_TC_COMPLETION_SUBSTATE
|
|
);
|
|
}
|
|
|
|
/**
|
|
*
|
|
*
|
|
* This state is entered when there is an TC completion failure. The hardware
|
|
* received an unexpected condition while processing the IO request and now
|
|
* will UF the D2H register FIS to complete the IO.
|
|
*/
|
|
static void scic_sds_stp_request_started_udma_await_d2h_reg_fis_enter(
|
|
void *object)
|
|
{
|
|
struct scic_sds_request *sci_req = object;
|
|
|
|
SET_STATE_HANDLER(
|
|
sci_req,
|
|
scic_sds_stp_request_started_udma_substate_handler_table,
|
|
SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE
|
|
);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------- */
|
|
|
|
static const struct sci_base_state scic_sds_stp_request_started_udma_substate_table[] = {
|
|
[SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_TC_COMPLETION_SUBSTATE] = {
|
|
.enter_state = scic_sds_stp_request_started_udma_await_tc_completion_enter,
|
|
},
|
|
[SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE] = {
|
|
.enter_state = scic_sds_stp_request_started_udma_await_d2h_reg_fis_enter,
|
|
},
|
|
};
|
|
|
|
enum sci_status scic_sds_stp_udma_request_construct(struct scic_sds_request *sci_req,
|
|
u32 len,
|
|
enum dma_data_direction dir)
|
|
{
|
|
scic_sds_stp_non_ncq_request_construct(sci_req);
|
|
|
|
scic_sds_stp_optimized_request_construct(sci_req, SCU_TASK_TYPE_DMA_IN,
|
|
len, dir);
|
|
|
|
sci_base_state_machine_construct(
|
|
&sci_req->started_substate_machine,
|
|
sci_req,
|
|
scic_sds_stp_request_started_udma_substate_table,
|
|
SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_TC_COMPLETION_SUBSTATE
|
|
);
|
|
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @sci_req:
|
|
* @completion_code:
|
|
*
|
|
* This method processes a TC completion. The expected TC completion is for
|
|
* the transmission of the H2D register FIS containing the SATA/STP non-data
|
|
* request. This method always successfully processes the TC completion.
|
|
* SCI_SUCCESS This value is always returned.
|
|
*/
|
|
static enum sci_status scic_sds_stp_request_soft_reset_await_h2d_asserted_tc_completion_handler(
|
|
struct scic_sds_request *sci_req,
|
|
u32 completion_code)
|
|
{
|
|
switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
|
|
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD):
|
|
scic_sds_request_set_status(
|
|
sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS
|
|
);
|
|
|
|
sci_base_state_machine_change_state(
|
|
&sci_req->started_substate_machine,
|
|
SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_DIAGNOSTIC_COMPLETION_SUBSTATE
|
|
);
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* All other completion status cause the IO to be complete. If a NAK
|
|
* was received, then it is up to the user to retry the request. */
|
|
scic_sds_request_set_status(
|
|
sci_req,
|
|
SCU_NORMALIZE_COMPLETION_STATUS(completion_code),
|
|
SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR
|
|
);
|
|
|
|
sci_base_state_machine_change_state(
|
|
&sci_req->state_machine, SCI_BASE_REQUEST_STATE_COMPLETED);
|
|
break;
|
|
}
|
|
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @sci_req:
|
|
* @completion_code:
|
|
*
|
|
* This method processes a TC completion. The expected TC completion is for
|
|
* the transmission of the H2D register FIS containing the SATA/STP non-data
|
|
* request. This method always successfully processes the TC completion.
|
|
* SCI_SUCCESS This value is always returned.
|
|
*/
|
|
static enum sci_status scic_sds_stp_request_soft_reset_await_h2d_diagnostic_tc_completion_handler(
|
|
struct scic_sds_request *sci_req,
|
|
u32 completion_code)
|
|
{
|
|
switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
|
|
case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD):
|
|
scic_sds_request_set_status(
|
|
sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS
|
|
);
|
|
|
|
sci_base_state_machine_change_state(
|
|
&sci_req->started_substate_machine,
|
|
SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE
|
|
);
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* All other completion status cause the IO to be complete. If a NAK
|
|
* was received, then it is up to the user to retry the request. */
|
|
scic_sds_request_set_status(
|
|
sci_req,
|
|
SCU_NORMALIZE_COMPLETION_STATUS(completion_code),
|
|
SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR
|
|
);
|
|
|
|
sci_base_state_machine_change_state(&sci_req->state_machine,
|
|
SCI_BASE_REQUEST_STATE_COMPLETED);
|
|
break;
|
|
}
|
|
|
|
return SCI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @request: This parameter specifies the request for which a frame has been
|
|
* received.
|
|
* @frame_index: This parameter specifies the index of the frame that has been
|
|
* received.
|
|
*
|
|
* This method processes frames received from the target while waiting for a
|
|
* device to host register FIS. If a non-register FIS is received during this
|
|
* time, it is treated as a protocol violation from an IO perspective. Indicate
|
|
* if the received frame was processed successfully.
|
|
*/
|
|
static enum sci_status scic_sds_stp_request_soft_reset_await_d2h_frame_handler(
|
|
struct scic_sds_request *sci_req,
|
|
u32 frame_index)
|
|
{
|
|
enum sci_status status;
|
|
struct dev_to_host_fis *frame_header;
|
|
u32 *frame_buffer;
|
|
struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
|
|
struct scic_sds_controller *scic = sci_req->owning_controller;
|
|
|
|
status = scic_sds_unsolicited_frame_control_get_header(&scic->uf_control,
|
|
frame_index,
|
|
(void **)&frame_header);
|
|
if (status != SCI_SUCCESS) {
|
|
dev_err(scic_to_dev(scic),
|
|
"%s: SCIC IO Request 0x%p could not get frame header "
|
|
"for frame index %d, status %x\n",
|
|
__func__, stp_req, frame_index, status);
|
|
return status;
|
|
}
|
|
|
|
switch (frame_header->fis_type) {
|
|
case FIS_REGD2H:
|
|
scic_sds_unsolicited_frame_control_get_buffer(&scic->uf_control,
|
|
frame_index,
|
|
(void **)&frame_buffer);
|
|
|
|
scic_sds_controller_copy_sata_response(&sci_req->stp.rsp,
|
|
frame_header,
|
|
frame_buffer);
|
|
|
|
/* The command has completed with error */
|
|
scic_sds_request_set_status(sci_req,
|
|
SCU_TASK_DONE_CHECK_RESPONSE,
|
|
SCI_FAILURE_IO_RESPONSE_VALID);
|
|
break;
|
|
|
|
default:
|
|
dev_warn(scic_to_dev(scic),
|
|
"%s: IO Request:0x%p Frame Id:%d protocol "
|
|
"violation occurred\n", __func__, stp_req,
|
|
frame_index);
|
|
|
|
scic_sds_request_set_status(sci_req, SCU_TASK_DONE_UNEXP_FIS,
|
|
SCI_FAILURE_PROTOCOL_VIOLATION);
|
|
break;
|
|
}
|
|
|
|
sci_base_state_machine_change_state(&sci_req->state_machine,
|
|
SCI_BASE_REQUEST_STATE_COMPLETED);
|
|
|
|
/* Frame has been decoded return it to the controller */
|
|
scic_sds_controller_release_frame(scic, frame_index);
|
|
|
|
return status;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------- */
|
|
|
|
static const struct scic_sds_io_request_state_handler scic_sds_stp_request_started_soft_reset_substate_handler_table[] = {
|
|
[SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_ASSERTED_COMPLETION_SUBSTATE] = {
|
|
.abort_handler = scic_sds_request_started_state_abort_handler,
|
|
.tc_completion_handler = scic_sds_stp_request_soft_reset_await_h2d_asserted_tc_completion_handler,
|
|
},
|
|
[SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_DIAGNOSTIC_COMPLETION_SUBSTATE] = {
|
|
.abort_handler = scic_sds_request_started_state_abort_handler,
|
|
.tc_completion_handler = scic_sds_stp_request_soft_reset_await_h2d_diagnostic_tc_completion_handler,
|
|
},
|
|
[SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE] = {
|
|
.abort_handler = scic_sds_request_started_state_abort_handler,
|
|
.frame_handler = scic_sds_stp_request_soft_reset_await_d2h_frame_handler,
|
|
},
|
|
};
|
|
|
|
static void scic_sds_stp_request_started_soft_reset_await_h2d_asserted_completion_enter(
|
|
void *object)
|
|
{
|
|
struct scic_sds_request *sci_req = object;
|
|
|
|
SET_STATE_HANDLER(
|
|
sci_req,
|
|
scic_sds_stp_request_started_soft_reset_substate_handler_table,
|
|
SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_ASSERTED_COMPLETION_SUBSTATE
|
|
);
|
|
|
|
scic_sds_remote_device_set_working_request(
|
|
sci_req->target_device, sci_req
|
|
);
|
|
}
|
|
|
|
static void scic_sds_stp_request_started_soft_reset_await_h2d_diagnostic_completion_enter(
|
|
void *object)
|
|
{
|
|
struct scic_sds_request *sci_req = object;
|
|
struct scu_task_context *task_context;
|
|
struct host_to_dev_fis *h2d_fis;
|
|
enum sci_status status;
|
|
|
|
/* Clear the SRST bit */
|
|
h2d_fis = &sci_req->stp.cmd;
|
|
h2d_fis->control = 0;
|
|
|
|
/* Clear the TC control bit */
|
|
task_context = scic_sds_controller_get_task_context_buffer(
|
|
sci_req->owning_controller, sci_req->io_tag);
|
|
task_context->control_frame = 0;
|
|
|
|
status = scic_controller_continue_io(sci_req);
|
|
if (status == SCI_SUCCESS) {
|
|
SET_STATE_HANDLER(
|
|
sci_req,
|
|
scic_sds_stp_request_started_soft_reset_substate_handler_table,
|
|
SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_DIAGNOSTIC_COMPLETION_SUBSTATE
|
|
);
|
|
}
|
|
}
|
|
|
|
static void scic_sds_stp_request_started_soft_reset_await_d2h_response_enter(
|
|
void *object)
|
|
{
|
|
struct scic_sds_request *sci_req = object;
|
|
|
|
SET_STATE_HANDLER(
|
|
sci_req,
|
|
scic_sds_stp_request_started_soft_reset_substate_handler_table,
|
|
SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE
|
|
);
|
|
}
|
|
|
|
static const struct sci_base_state scic_sds_stp_request_started_soft_reset_substate_table[] = {
|
|
[SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_ASSERTED_COMPLETION_SUBSTATE] = {
|
|
.enter_state = scic_sds_stp_request_started_soft_reset_await_h2d_asserted_completion_enter,
|
|
},
|
|
[SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_DIAGNOSTIC_COMPLETION_SUBSTATE] = {
|
|
.enter_state = scic_sds_stp_request_started_soft_reset_await_h2d_diagnostic_completion_enter,
|
|
},
|
|
[SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE] = {
|
|
.enter_state = scic_sds_stp_request_started_soft_reset_await_d2h_response_enter,
|
|
},
|
|
};
|
|
|
|
enum sci_status scic_sds_stp_soft_reset_request_construct(struct scic_sds_request *sci_req)
|
|
{
|
|
struct scic_sds_stp_request *stp_req = &sci_req->stp.req;
|
|
|
|
scic_sds_stp_non_ncq_request_construct(sci_req);
|
|
|
|
/* Build the STP task context structure */
|
|
scu_stp_raw_request_construct_task_context(stp_req, sci_req->task_context_buffer);
|
|
|
|
sci_base_state_machine_construct(&sci_req->started_substate_machine,
|
|
sci_req,
|
|
scic_sds_stp_request_started_soft_reset_substate_table,
|
|
SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_ASSERTED_COMPLETION_SUBSTATE);
|
|
|
|
return SCI_SUCCESS;
|
|
}
|