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310 lines
11 KiB
310 lines
11 KiB
/* |
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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, 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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