314 lines
11 KiB
C
314 lines
11 KiB
C
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/*
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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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#ifndef _ISCI_REQUEST_H_
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#define _ISCI_REQUEST_H_
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#include "isci.h"
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#include "host.h"
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#include "scu_task_context.h"
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/**
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* isci_stp_request - extra request infrastructure to handle pio/atapi protocol
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* @pio_len - number of bytes requested at PIO setup
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* @status - pio setup ending status value to tell us if we need
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* to wait for another fis or if the transfer is complete. Upon
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* receipt of a d2h fis this will be the status field of that fis.
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* @sgl - track pio transfer progress as we iterate through the sgl
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*/
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struct isci_stp_request {
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u32 pio_len;
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u8 status;
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struct isci_stp_pio_sgl {
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int index;
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u8 set;
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u32 offset;
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} sgl;
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};
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struct isci_request {
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#define IREQ_COMPLETE_IN_TARGET 0
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#define IREQ_TERMINATED 1
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#define IREQ_TMF 2
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#define IREQ_ACTIVE 3
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#define IREQ_PENDING_ABORT 4 /* Set == device was not suspended yet */
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#define IREQ_TC_ABORT_POSTED 5
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#define IREQ_ABORT_PATH_ACTIVE 6
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#define IREQ_NO_AUTO_FREE_TAG 7 /* Set when being explicitly managed */
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unsigned long flags;
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/* XXX kill ttype and ttype_ptr, allocate full sas_task */
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union ttype_ptr_union {
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struct sas_task *io_task_ptr; /* When ttype==io_task */
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struct isci_tmf *tmf_task_ptr; /* When ttype==tmf_task */
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} ttype_ptr;
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struct isci_host *isci_host;
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dma_addr_t request_daddr;
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dma_addr_t zero_scatter_daddr;
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unsigned int num_sg_entries;
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/* Note: "io_request_completion" is completed in two different ways
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* depending on whether this is a TMF or regular request.
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* - TMF requests are completed in the thread that started them;
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* - regular requests are completed in the request completion callback
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* function.
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* This difference in operation allows the aborter of a TMF request
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* to be sure that once the TMF request completes, the I/O that the
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* TMF was aborting is guaranteed to have completed.
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*
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* XXX kill io_request_completion
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*/
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struct completion *io_request_completion;
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struct sci_base_state_machine sm;
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struct isci_host *owning_controller;
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struct isci_remote_device *target_device;
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u16 io_tag;
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enum sas_protocol protocol;
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u32 scu_status; /* hardware result */
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u32 sci_status; /* upper layer disposition */
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u32 post_context;
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struct scu_task_context *tc;
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/* could be larger with sg chaining */
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#define SCU_SGL_SIZE ((SCI_MAX_SCATTER_GATHER_ELEMENTS + 1) / 2)
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struct scu_sgl_element_pair sg_table[SCU_SGL_SIZE] __attribute__ ((aligned(32)));
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/* This field is a pointer to the stored rx frame data. It is used in
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* STP internal requests and SMP response frames. If this field is
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* non-NULL the saved frame must be released on IO request completion.
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*/
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u32 saved_rx_frame_index;
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union {
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struct {
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union {
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struct ssp_cmd_iu cmd;
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struct ssp_task_iu tmf;
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};
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union {
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struct ssp_response_iu rsp;
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u8 rsp_buf[SSP_RESP_IU_MAX_SIZE];
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};
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} ssp;
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struct {
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struct isci_stp_request req;
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struct host_to_dev_fis cmd;
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struct dev_to_host_fis rsp;
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} stp;
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};
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};
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static inline struct isci_request *to_ireq(struct isci_stp_request *stp_req)
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{
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struct isci_request *ireq;
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ireq = container_of(stp_req, typeof(*ireq), stp.req);
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return ireq;
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}
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/**
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* enum sci_base_request_states - request state machine states
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*
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* @SCI_REQ_INIT: Simply the initial state for the base request state machine.
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*
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* @SCI_REQ_CONSTRUCTED: This state indicates that the request has been
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* constructed. This state is entered from the INITIAL state.
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*
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* @SCI_REQ_STARTED: This state indicates that the request has been started.
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* This state is entered from the CONSTRUCTED state.
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*
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* @SCI_REQ_STP_UDMA_WAIT_TC_COMP:
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* @SCI_REQ_STP_UDMA_WAIT_D2H:
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* @SCI_REQ_STP_NON_DATA_WAIT_H2D:
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* @SCI_REQ_STP_NON_DATA_WAIT_D2H:
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*
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* @SCI_REQ_STP_PIO_WAIT_H2D: While in this state the IO request object is
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* waiting for the TC completion notification for the H2D Register FIS
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*
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* @SCI_REQ_STP_PIO_WAIT_FRAME: While in this state the IO request object is
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* waiting for either a PIO Setup FIS or a D2H register FIS. The type of frame
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* received is based on the result of the prior frame and line conditions.
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*
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* @SCI_REQ_STP_PIO_DATA_IN: While in this state the IO request object is
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* waiting for a DATA frame from the device.
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*
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* @SCI_REQ_STP_PIO_DATA_OUT: While in this state the IO request object is
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* waiting to transmit the next data frame to the device.
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*
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* @SCI_REQ_ATAPI_WAIT_H2D: While in this state the IO request object is
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* waiting for the TC completion notification for the H2D Register FIS
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*
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* @SCI_REQ_ATAPI_WAIT_PIO_SETUP: While in this state the IO request object is
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* waiting for either a PIO Setup.
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*
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* @SCI_REQ_ATAPI_WAIT_D2H: The non-data IO transit to this state in this state
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* after receiving TC completion. While in this state IO request object is
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* waiting for D2H status frame as UF.
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*
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* @SCI_REQ_ATAPI_WAIT_TC_COMP: When transmitting raw frames hardware reports
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* task context completion after every frame submission, so in the
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* non-accelerated case we need to expect the completion for the "cdb" frame.
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*
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* @SCI_REQ_TASK_WAIT_TC_COMP: The AWAIT_TC_COMPLETION sub-state indicates that
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* the started raw task management request is waiting for the transmission of
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* the initial frame (i.e. command, task, etc.).
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*
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* @SCI_REQ_TASK_WAIT_TC_RESP: This sub-state indicates that the started task
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* management request is waiting for the reception of an unsolicited frame
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* (i.e. response IU).
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*
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* @SCI_REQ_SMP_WAIT_RESP: This sub-state indicates that the started task
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* management request is waiting for the reception of an unsolicited frame
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* (i.e. response IU).
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*
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* @SCI_REQ_SMP_WAIT_TC_COMP: The AWAIT_TC_COMPLETION sub-state indicates that
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* the started SMP request is waiting for the transmission of the initial frame
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* (i.e. command, task, etc.).
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*
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* @SCI_REQ_COMPLETED: This state indicates that the request has completed.
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* This state is entered from the STARTED state. This state is entered from the
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* ABORTING state.
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*
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* @SCI_REQ_ABORTING: This state indicates that the request is in the process
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* of being terminated/aborted. This state is entered from the CONSTRUCTED
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* state. This state is entered from the STARTED state.
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*
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* @SCI_REQ_FINAL: Simply the final state for the base request state machine.
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*/
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#define REQUEST_STATES {\
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C(REQ_INIT),\
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C(REQ_CONSTRUCTED),\
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C(REQ_STARTED),\
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C(REQ_STP_UDMA_WAIT_TC_COMP),\
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C(REQ_STP_UDMA_WAIT_D2H),\
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C(REQ_STP_NON_DATA_WAIT_H2D),\
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C(REQ_STP_NON_DATA_WAIT_D2H),\
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C(REQ_STP_PIO_WAIT_H2D),\
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C(REQ_STP_PIO_WAIT_FRAME),\
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C(REQ_STP_PIO_DATA_IN),\
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C(REQ_STP_PIO_DATA_OUT),\
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C(REQ_ATAPI_WAIT_H2D),\
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C(REQ_ATAPI_WAIT_PIO_SETUP),\
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C(REQ_ATAPI_WAIT_D2H),\
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C(REQ_ATAPI_WAIT_TC_COMP),\
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C(REQ_TASK_WAIT_TC_COMP),\
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C(REQ_TASK_WAIT_TC_RESP),\
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C(REQ_SMP_WAIT_RESP),\
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C(REQ_SMP_WAIT_TC_COMP),\
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C(REQ_COMPLETED),\
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C(REQ_ABORTING),\
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C(REQ_FINAL),\
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}
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#undef C
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#define C(a) SCI_##a
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enum sci_base_request_states REQUEST_STATES;
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#undef C
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const char *req_state_name(enum sci_base_request_states state);
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enum sci_status sci_request_start(struct isci_request *ireq);
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enum sci_status sci_io_request_terminate(struct isci_request *ireq);
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enum sci_status
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sci_io_request_event_handler(struct isci_request *ireq,
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u32 event_code);
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enum sci_status
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sci_io_request_frame_handler(struct isci_request *ireq,
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u32 frame_index);
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enum sci_status
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sci_task_request_terminate(struct isci_request *ireq);
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extern enum sci_status
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sci_request_complete(struct isci_request *ireq);
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extern enum sci_status
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sci_io_request_tc_completion(struct isci_request *ireq, u32 code);
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/* XXX open code in caller */
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static inline dma_addr_t
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sci_io_request_get_dma_addr(struct isci_request *ireq, void *virt_addr)
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{
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char *requested_addr = (char *)virt_addr;
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char *base_addr = (char *)ireq;
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BUG_ON(requested_addr < base_addr);
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BUG_ON((requested_addr - base_addr) >= sizeof(*ireq));
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return ireq->request_daddr + (requested_addr - base_addr);
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}
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#define isci_request_access_task(req) ((req)->ttype_ptr.io_task_ptr)
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#define isci_request_access_tmf(req) ((req)->ttype_ptr.tmf_task_ptr)
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struct isci_request *isci_tmf_request_from_tag(struct isci_host *ihost,
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struct isci_tmf *isci_tmf,
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u16 tag);
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int isci_request_execute(struct isci_host *ihost, struct isci_remote_device *idev,
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struct sas_task *task, struct isci_request *ireq);
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struct isci_request *isci_io_request_from_tag(struct isci_host *ihost,
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struct sas_task *task,
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u16 tag);
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enum sci_status
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sci_task_request_construct(struct isci_host *ihost,
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struct isci_remote_device *idev,
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u16 io_tag,
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struct isci_request *ireq);
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enum sci_status sci_task_request_construct_ssp(struct isci_request *ireq);
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void sci_smp_request_copy_response(struct isci_request *ireq);
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static inline int isci_task_is_ncq_recovery(struct sas_task *task)
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{
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return (sas_protocol_ata(task->task_proto) &&
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task->ata_task.fis.command == ATA_CMD_READ_LOG_EXT &&
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task->ata_task.fis.lbal == ATA_LOG_SATA_NCQ);
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}
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#endif /* !defined(_ISCI_REQUEST_H_) */
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