2011-07-03 13:56:22 +08:00
|
|
|
/*
|
|
|
|
* This file is provided under a dual BSD/GPLv2 license. When using or
|
|
|
|
* redistributing this file, you may do so under either license.
|
|
|
|
*
|
|
|
|
* GPL LICENSE SUMMARY
|
|
|
|
*
|
|
|
|
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify
|
|
|
|
* it under the terms of version 2 of the GNU General Public License as
|
|
|
|
* published by the Free Software Foundation.
|
|
|
|
*
|
|
|
|
* This program is distributed in the hope that it will be useful, but
|
|
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
|
* General Public License for more details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
|
|
* along with this program; if not, write to the Free Software
|
|
|
|
* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
|
|
|
|
* The full GNU General Public License is included in this distribution
|
|
|
|
* in the file called LICENSE.GPL.
|
|
|
|
*
|
|
|
|
* BSD LICENSE
|
|
|
|
*
|
|
|
|
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
|
|
|
|
* All rights reserved.
|
|
|
|
*
|
|
|
|
* Redistribution and use in source and binary forms, with or without
|
|
|
|
* modification, are permitted provided that the following conditions
|
|
|
|
* are met:
|
|
|
|
*
|
|
|
|
* * Redistributions of source code must retain the above copyright
|
|
|
|
* notice, this list of conditions and the following disclaimer.
|
|
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
|
|
* notice, this list of conditions and the following disclaimer in
|
|
|
|
* the documentation and/or other materials provided with the
|
|
|
|
* distribution.
|
|
|
|
* * Neither the name of Intel Corporation nor the names of its
|
|
|
|
* contributors may be used to endorse or promote products derived
|
|
|
|
* from this software without specific prior written permission.
|
|
|
|
*
|
|
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
*/
|
|
|
|
|
2011-05-08 16:56:57 +08:00
|
|
|
#ifndef _ISCI_REQUEST_H_
|
2011-07-03 13:56:22 +08:00
|
|
|
#define _ISCI_REQUEST_H_
|
|
|
|
|
|
|
|
#include "isci.h"
|
2011-05-09 06:49:15 +08:00
|
|
|
#include "host.h"
|
2011-05-10 17:28:45 +08:00
|
|
|
#include "scu_task_context.h"
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
/**
|
|
|
|
* struct isci_request_status - This enum defines the possible states of an I/O
|
|
|
|
* request.
|
|
|
|
*
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
enum isci_request_status {
|
|
|
|
unallocated = 0x00,
|
|
|
|
allocated = 0x01,
|
|
|
|
started = 0x02,
|
|
|
|
completed = 0x03,
|
|
|
|
aborting = 0x04,
|
|
|
|
aborted = 0x05,
|
2011-03-05 06:06:52 +08:00
|
|
|
terminating = 0x06,
|
|
|
|
dead = 0x07
|
2011-07-03 13:56:22 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
enum task_type {
|
|
|
|
io_task = 0,
|
|
|
|
tmf_task = 1
|
|
|
|
};
|
|
|
|
|
2011-05-10 17:28:45 +08:00
|
|
|
enum sci_request_protocol {
|
|
|
|
SCIC_NO_PROTOCOL,
|
|
|
|
SCIC_SMP_PROTOCOL,
|
|
|
|
SCIC_SSP_PROTOCOL,
|
|
|
|
SCIC_STP_PROTOCOL
|
2011-05-10 17:28:48 +08:00
|
|
|
}; /* XXX remove me, use sas_task.{dev|task_proto} instead */;
|
2011-05-10 17:28:45 +08:00
|
|
|
|
2011-05-10 17:28:49 +08:00
|
|
|
struct scic_sds_stp_request {
|
|
|
|
union {
|
|
|
|
u32 ncq;
|
|
|
|
|
|
|
|
u32 udma;
|
|
|
|
|
|
|
|
struct scic_sds_stp_pio_request {
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
|
|
|
* Total transfer for the entire PIO request recorded
|
|
|
|
* at request constuction time.
|
2011-05-10 17:28:49 +08:00
|
|
|
*
|
2011-06-02 08:10:43 +08:00
|
|
|
* @todo Should we just decrement this value for each
|
|
|
|
* byte of data transitted or received to elemenate
|
|
|
|
* the current_transfer_bytes field?
|
2011-05-10 17:28:49 +08:00
|
|
|
*/
|
|
|
|
u32 total_transfer_bytes;
|
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
|
|
|
* Total number of bytes received/transmitted in data
|
|
|
|
* frames since the start of the IO request. At the
|
|
|
|
* end of the IO request this should equal the
|
2011-05-10 17:28:49 +08:00
|
|
|
* total_transfer_bytes.
|
|
|
|
*/
|
|
|
|
u32 current_transfer_bytes;
|
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
|
|
|
* The number of bytes requested in the in the PIO
|
|
|
|
* setup.
|
2011-05-10 17:28:49 +08:00
|
|
|
*/
|
|
|
|
u32 pio_transfer_bytes;
|
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
|
|
|
* PIO Setup ending status value to tell us if we need
|
|
|
|
* to wait for another FIS or if the transfer is
|
|
|
|
* complete. On the receipt of a D2H FIS this will be
|
2011-05-10 17:28:49 +08:00
|
|
|
* the status field of that FIS.
|
|
|
|
*/
|
|
|
|
u8 ending_status;
|
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
|
|
|
* On receipt of a D2H FIS this will be the ending
|
|
|
|
* error field if the ending_status has the
|
|
|
|
* SATA_STATUS_ERR bit set.
|
2011-05-10 17:28:49 +08:00
|
|
|
*/
|
|
|
|
u8 ending_error;
|
|
|
|
|
|
|
|
struct scic_sds_request_pio_sgl {
|
|
|
|
struct scu_sgl_element_pair *sgl_pair;
|
|
|
|
u8 sgl_set;
|
|
|
|
u32 sgl_offset;
|
|
|
|
} request_current;
|
|
|
|
} pio;
|
|
|
|
|
|
|
|
struct {
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
|
|
|
* The number of bytes requested in the PIO setup
|
|
|
|
* before CDB data frame.
|
2011-05-10 17:28:49 +08:00
|
|
|
*/
|
|
|
|
u32 device_preferred_cdb_length;
|
|
|
|
} packet;
|
|
|
|
} type;
|
|
|
|
};
|
|
|
|
|
2011-05-10 17:28:45 +08:00
|
|
|
struct scic_sds_request {
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
|
|
|
* This field contains the information for the base request state
|
|
|
|
* machine.
|
2011-05-10 17:28:45 +08:00
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
struct sci_base_state_machine sm;
|
2011-05-10 17:28:45 +08:00
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
2011-05-10 17:28:45 +08:00
|
|
|
* This field simply points to the controller to which this IO request
|
|
|
|
* is associated.
|
|
|
|
*/
|
|
|
|
struct scic_sds_controller *owning_controller;
|
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
|
|
|
* This field simply points to the remote device to which this IO
|
|
|
|
* request is associated.
|
2011-05-10 17:28:45 +08:00
|
|
|
*/
|
|
|
|
struct scic_sds_remote_device *target_device;
|
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
2011-05-10 17:28:45 +08:00
|
|
|
* This field is utilized to determine if the SCI user is managing
|
|
|
|
* the IO tag for this request or if the core is managing it.
|
|
|
|
*/
|
|
|
|
bool was_tag_assigned_by_user;
|
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
2011-05-10 17:28:45 +08:00
|
|
|
* This field indicates the IO tag for this request. The IO tag is
|
|
|
|
* comprised of the task_index and a sequence count. The sequence count
|
|
|
|
* is utilized to help identify tasks from one life to another.
|
|
|
|
*/
|
|
|
|
u16 io_tag;
|
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
2011-05-10 17:28:45 +08:00
|
|
|
* This field specifies the protocol being utilized for this
|
|
|
|
* IO request.
|
|
|
|
*/
|
|
|
|
enum sci_request_protocol protocol;
|
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
2011-05-10 17:28:45 +08:00
|
|
|
* This field indicates the completion status taken from the SCUs
|
2011-06-02 08:10:43 +08:00
|
|
|
* completion code. It indicates the completion result for the SCU
|
|
|
|
* hardware.
|
2011-05-10 17:28:45 +08:00
|
|
|
*/
|
|
|
|
u32 scu_status;
|
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
|
|
|
* This field indicates the completion status returned to the SCI user.
|
|
|
|
* It indicates the users view of the io request completion.
|
2011-05-10 17:28:45 +08:00
|
|
|
*/
|
|
|
|
u32 sci_status;
|
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
|
|
|
* This field contains the value to be utilized when posting
|
|
|
|
* (e.g. Post_TC, * Post_TC_Abort) this request to the silicon.
|
2011-05-10 17:28:45 +08:00
|
|
|
*/
|
|
|
|
u32 post_context;
|
|
|
|
|
|
|
|
struct scu_task_context *task_context_buffer;
|
|
|
|
struct scu_task_context tc ____cacheline_aligned;
|
|
|
|
|
|
|
|
/* could be larger with sg chaining */
|
|
|
|
#define SCU_SGL_SIZE ((SCU_IO_REQUEST_SGE_COUNT + 1) / 2)
|
|
|
|
struct scu_sgl_element_pair sg_table[SCU_SGL_SIZE] __attribute__ ((aligned(32)));
|
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
2011-05-10 17:28:45 +08:00
|
|
|
* This field indicates if this request is a task management request or
|
|
|
|
* normal IO request.
|
|
|
|
*/
|
|
|
|
bool is_task_management_request;
|
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
|
|
|
* This field is a pointer to the stored rx frame data. It is used in
|
|
|
|
* STP internal requests and SMP response frames. If this field is
|
|
|
|
* non-NULL the saved frame must be released on IO request completion.
|
2011-05-10 17:28:45 +08:00
|
|
|
*
|
|
|
|
* @todo In the future do we want to keep a list of RX frame buffers?
|
|
|
|
*/
|
|
|
|
u32 saved_rx_frame_index;
|
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
|
|
|
* This field in the recorded device sequence for the io request.
|
|
|
|
* This is recorded during the build operation and is compared in the
|
|
|
|
* start operation. If the sequence is different then there was a
|
|
|
|
* change of devices from the build to start operations.
|
2011-05-10 17:28:45 +08:00
|
|
|
*/
|
|
|
|
u8 device_sequence;
|
|
|
|
|
|
|
|
union {
|
|
|
|
struct {
|
|
|
|
union {
|
|
|
|
struct ssp_cmd_iu cmd;
|
|
|
|
struct ssp_task_iu tmf;
|
|
|
|
};
|
|
|
|
union {
|
|
|
|
struct ssp_response_iu rsp;
|
|
|
|
u8 rsp_buf[SSP_RESP_IU_MAX_SIZE];
|
|
|
|
};
|
|
|
|
} ssp;
|
|
|
|
|
|
|
|
struct {
|
|
|
|
struct smp_req cmd;
|
|
|
|
struct smp_resp rsp;
|
|
|
|
} smp;
|
|
|
|
|
|
|
|
struct {
|
|
|
|
struct scic_sds_stp_request req;
|
|
|
|
struct host_to_dev_fis cmd;
|
|
|
|
struct dev_to_host_fis rsp;
|
|
|
|
} stp;
|
|
|
|
};
|
|
|
|
|
|
|
|
};
|
|
|
|
|
|
|
|
static inline struct scic_sds_request *to_sci_req(struct scic_sds_stp_request *stp_req)
|
|
|
|
{
|
|
|
|
struct scic_sds_request *sci_req;
|
|
|
|
|
|
|
|
sci_req = container_of(stp_req, typeof(*sci_req), stp.req);
|
|
|
|
return sci_req;
|
|
|
|
}
|
|
|
|
|
2011-07-03 13:56:22 +08:00
|
|
|
struct isci_request {
|
|
|
|
enum isci_request_status status;
|
|
|
|
enum task_type ttype;
|
|
|
|
unsigned short io_tag;
|
|
|
|
bool complete_in_target;
|
2011-05-09 02:47:15 +08:00
|
|
|
bool terminated;
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
union ttype_ptr_union {
|
|
|
|
struct sas_task *io_task_ptr; /* When ttype==io_task */
|
|
|
|
struct isci_tmf *tmf_task_ptr; /* When ttype==tmf_task */
|
|
|
|
} ttype_ptr;
|
|
|
|
struct isci_host *isci_host;
|
|
|
|
struct isci_remote_device *isci_device;
|
|
|
|
/* For use in the requests_to_{complete|abort} lists: */
|
|
|
|
struct list_head completed_node;
|
|
|
|
/* For use in the reqs_in_process list: */
|
|
|
|
struct list_head dev_node;
|
|
|
|
spinlock_t state_lock;
|
|
|
|
dma_addr_t request_daddr;
|
|
|
|
dma_addr_t zero_scatter_daddr;
|
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
unsigned int num_sg_entries; /* returned by pci_alloc_sg */
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
/** Note: "io_request_completion" is completed in two different ways
|
|
|
|
* depending on whether this is a TMF or regular request.
|
|
|
|
* - TMF requests are completed in the thread that started them;
|
|
|
|
* - regular requests are completed in the request completion callback
|
|
|
|
* function.
|
|
|
|
* This difference in operation allows the aborter of a TMF request
|
|
|
|
* to be sure that once the TMF request completes, the I/O that the
|
|
|
|
* TMF was aborting is guaranteed to have completed.
|
|
|
|
*/
|
|
|
|
struct completion *io_request_completion;
|
2011-05-09 02:47:15 +08:00
|
|
|
struct scic_sds_request sci;
|
2011-07-03 13:56:22 +08:00
|
|
|
};
|
|
|
|
|
2011-05-09 02:47:15 +08:00
|
|
|
static inline struct isci_request *sci_req_to_ireq(struct scic_sds_request *sci_req)
|
|
|
|
{
|
|
|
|
struct isci_request *ireq = container_of(sci_req, typeof(*ireq), sci);
|
|
|
|
|
|
|
|
return ireq;
|
|
|
|
}
|
|
|
|
|
2011-05-10 17:28:45 +08:00
|
|
|
/**
|
|
|
|
* enum sci_base_request_states - This enumeration depicts all the states for
|
|
|
|
* the common request state machine.
|
|
|
|
*
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
enum sci_base_request_states {
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
2011-05-10 17:28:45 +08:00
|
|
|
* Simply the initial state for the base request state machine.
|
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
SCI_REQ_INIT,
|
2011-05-10 17:28:45 +08:00
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
|
|
|
* This state indicates that the request has been constructed.
|
|
|
|
* This state is entered from the INITIAL state.
|
2011-05-10 17:28:45 +08:00
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
SCI_REQ_CONSTRUCTED,
|
2011-05-10 17:28:45 +08:00
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
|
|
|
* This state indicates that the request has been started. This state
|
|
|
|
* is entered from the CONSTRUCTED state.
|
2011-05-10 17:28:45 +08:00
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
SCI_REQ_STARTED,
|
2011-05-10 17:28:45 +08:00
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
SCI_REQ_STP_UDMA_WAIT_TC_COMP,
|
|
|
|
SCI_REQ_STP_UDMA_WAIT_D2H,
|
2011-05-10 17:28:49 +08:00
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
SCI_REQ_STP_NON_DATA_WAIT_H2D,
|
|
|
|
SCI_REQ_STP_NON_DATA_WAIT_D2H,
|
2011-05-10 17:28:49 +08:00
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
SCI_REQ_STP_SOFT_RESET_WAIT_H2D_ASSERTED,
|
|
|
|
SCI_REQ_STP_SOFT_RESET_WAIT_H2D_DIAG,
|
|
|
|
SCI_REQ_STP_SOFT_RESET_WAIT_D2H,
|
2011-05-10 17:28:49 +08:00
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
|
|
|
* While in this state the IO request object is waiting for the TC
|
|
|
|
* completion notification for the H2D Register FIS
|
2011-05-10 17:28:49 +08:00
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
SCI_REQ_STP_PIO_WAIT_H2D,
|
2011-05-10 17:28:49 +08:00
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
|
|
|
* While in this state the IO request object is waiting for either a
|
|
|
|
* PIO Setup FIS or a D2H register FIS. The type of frame received is
|
|
|
|
* based on the result of the prior frame and line conditions.
|
2011-05-10 17:28:49 +08:00
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
SCI_REQ_STP_PIO_WAIT_FRAME,
|
2011-05-10 17:28:49 +08:00
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
|
|
|
* While in this state the IO request object is waiting for a DATA
|
|
|
|
* frame from the device.
|
2011-05-10 17:28:49 +08:00
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
SCI_REQ_STP_PIO_DATA_IN,
|
2011-05-10 17:28:49 +08:00
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
|
|
|
* While in this state the IO request object is waiting to transmit
|
|
|
|
* the next data frame to the device.
|
2011-05-10 17:28:49 +08:00
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
SCI_REQ_STP_PIO_DATA_OUT,
|
2011-05-10 17:28:49 +08:00
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
2011-05-10 17:28:47 +08:00
|
|
|
* The AWAIT_TC_COMPLETION sub-state indicates that the started raw
|
|
|
|
* task management request is waiting for the transmission of the
|
|
|
|
* initial frame (i.e. command, task, etc.).
|
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
SCI_REQ_TASK_WAIT_TC_COMP,
|
2011-05-10 17:28:47 +08:00
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
2011-05-10 17:28:47 +08:00
|
|
|
* This sub-state indicates that the started task management request
|
|
|
|
* is waiting for the reception of an unsolicited frame
|
|
|
|
* (i.e. response IU).
|
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
SCI_REQ_TASK_WAIT_TC_RESP,
|
2011-05-10 17:28:47 +08:00
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
2011-05-10 17:28:48 +08:00
|
|
|
* This sub-state indicates that the started task management request
|
|
|
|
* is waiting for the reception of an unsolicited frame
|
|
|
|
* (i.e. response IU).
|
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
SCI_REQ_SMP_WAIT_RESP,
|
2011-05-10 17:28:48 +08:00
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
|
|
|
* The AWAIT_TC_COMPLETION sub-state indicates that the started SMP
|
|
|
|
* request is waiting for the transmission of the initial frame
|
|
|
|
* (i.e. command, task, etc.).
|
2011-05-10 17:28:48 +08:00
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
SCI_REQ_SMP_WAIT_TC_COMP,
|
2011-05-10 17:28:48 +08:00
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
2011-05-10 17:28:45 +08:00
|
|
|
* This state indicates that the request has completed.
|
2011-06-02 08:10:43 +08:00
|
|
|
* This state is entered from the STARTED state. This state is entered
|
|
|
|
* from the ABORTING state.
|
2011-05-10 17:28:45 +08:00
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
SCI_REQ_COMPLETED,
|
2011-05-10 17:28:45 +08:00
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
2011-05-10 17:28:45 +08:00
|
|
|
* This state indicates that the request is in the process of being
|
|
|
|
* terminated/aborted.
|
|
|
|
* This state is entered from the CONSTRUCTED state.
|
|
|
|
* This state is entered from the STARTED state.
|
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
SCI_REQ_ABORTING,
|
2011-05-10 17:28:45 +08:00
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
/*
|
2011-05-10 17:28:45 +08:00
|
|
|
* Simply the final state for the base request state machine.
|
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
SCI_REQ_FINAL,
|
2011-05-10 17:28:45 +08:00
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* scic_sds_request_get_controller() -
|
|
|
|
*
|
|
|
|
* This macro will return the controller for this io request object
|
|
|
|
*/
|
|
|
|
#define scic_sds_request_get_controller(sci_req) \
|
|
|
|
((sci_req)->owning_controller)
|
|
|
|
|
|
|
|
/**
|
|
|
|
* scic_sds_request_get_device() -
|
|
|
|
*
|
|
|
|
* This macro will return the device for this io request object
|
|
|
|
*/
|
|
|
|
#define scic_sds_request_get_device(sci_req) \
|
|
|
|
((sci_req)->target_device)
|
|
|
|
|
|
|
|
/**
|
|
|
|
* scic_sds_request_get_port() -
|
|
|
|
*
|
|
|
|
* This macro will return the port for this io request object
|
|
|
|
*/
|
|
|
|
#define scic_sds_request_get_port(sci_req) \
|
|
|
|
scic_sds_remote_device_get_port(scic_sds_request_get_device(sci_req))
|
|
|
|
|
|
|
|
/**
|
|
|
|
* scic_sds_request_get_post_context() -
|
|
|
|
*
|
|
|
|
* This macro returns the constructed post context result for the io request.
|
|
|
|
*/
|
|
|
|
#define scic_sds_request_get_post_context(sci_req) \
|
|
|
|
((sci_req)->post_context)
|
|
|
|
|
|
|
|
/**
|
|
|
|
* scic_sds_request_get_task_context() -
|
|
|
|
*
|
|
|
|
* This is a helper macro to return the os handle for this request object.
|
|
|
|
*/
|
|
|
|
#define scic_sds_request_get_task_context(request) \
|
|
|
|
((request)->task_context_buffer)
|
|
|
|
|
|
|
|
/**
|
|
|
|
* scic_sds_request_set_status() -
|
|
|
|
*
|
|
|
|
* This macro will set the scu hardware status and sci request completion
|
|
|
|
* status for an io request.
|
|
|
|
*/
|
|
|
|
#define scic_sds_request_set_status(request, scu_status_code, sci_status_code) \
|
|
|
|
{ \
|
|
|
|
(request)->scu_status = (scu_status_code); \
|
|
|
|
(request)->sci_status = (sci_status_code); \
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* SCU_SGL_ZERO() -
|
|
|
|
*
|
|
|
|
* This macro zeros the hardware SGL element data
|
|
|
|
*/
|
|
|
|
#define SCU_SGL_ZERO(scu_sge) \
|
|
|
|
{ \
|
|
|
|
(scu_sge).length = 0; \
|
|
|
|
(scu_sge).address_lower = 0; \
|
|
|
|
(scu_sge).address_upper = 0; \
|
|
|
|
(scu_sge).address_modifier = 0; \
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* SCU_SGL_COPY() -
|
|
|
|
*
|
|
|
|
* This macro copys the SGL Element data from the host os to the hardware SGL
|
|
|
|
* elment data
|
|
|
|
*/
|
|
|
|
#define SCU_SGL_COPY(scu_sge, os_sge) \
|
|
|
|
{ \
|
|
|
|
(scu_sge).length = sg_dma_len(sg); \
|
|
|
|
(scu_sge).address_upper = \
|
|
|
|
upper_32_bits(sg_dma_address(sg)); \
|
|
|
|
(scu_sge).address_lower = \
|
|
|
|
lower_32_bits(sg_dma_address(sg)); \
|
|
|
|
(scu_sge).address_modifier = 0; \
|
|
|
|
}
|
|
|
|
|
|
|
|
enum sci_status scic_sds_request_start(struct scic_sds_request *sci_req);
|
|
|
|
enum sci_status scic_sds_io_request_terminate(struct scic_sds_request *sci_req);
|
2011-06-02 08:10:43 +08:00
|
|
|
enum sci_status
|
|
|
|
scic_sds_io_request_event_handler(struct scic_sds_request *sci_req,
|
|
|
|
u32 event_code);
|
|
|
|
enum sci_status
|
|
|
|
scic_sds_io_request_frame_handler(struct scic_sds_request *sci_req,
|
|
|
|
u32 frame_index);
|
|
|
|
enum sci_status
|
|
|
|
scic_sds_task_request_terminate(struct scic_sds_request *sci_req);
|
|
|
|
extern enum sci_status
|
|
|
|
scic_sds_request_complete(struct scic_sds_request *sci_req);
|
|
|
|
extern enum sci_status
|
|
|
|
scic_sds_io_request_tc_completion(struct scic_sds_request *sci_req, u32 code);
|
2011-05-10 17:28:45 +08:00
|
|
|
|
|
|
|
/* XXX open code in caller */
|
|
|
|
static inline void *scic_request_get_virt_addr(struct scic_sds_request *sci_req,
|
|
|
|
dma_addr_t phys_addr)
|
|
|
|
{
|
|
|
|
struct isci_request *ireq = sci_req_to_ireq(sci_req);
|
|
|
|
dma_addr_t offset;
|
|
|
|
|
|
|
|
BUG_ON(phys_addr < ireq->request_daddr);
|
|
|
|
|
|
|
|
offset = phys_addr - ireq->request_daddr;
|
|
|
|
|
|
|
|
BUG_ON(offset >= sizeof(*ireq));
|
|
|
|
|
|
|
|
return (char *)ireq + offset;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* XXX open code in caller */
|
2011-06-02 08:10:43 +08:00
|
|
|
static inline dma_addr_t
|
|
|
|
scic_io_request_get_dma_addr(struct scic_sds_request *sci_req, void *virt_addr)
|
2011-05-10 17:28:45 +08:00
|
|
|
{
|
|
|
|
struct isci_request *ireq = sci_req_to_ireq(sci_req);
|
|
|
|
|
|
|
|
char *requested_addr = (char *)virt_addr;
|
|
|
|
char *base_addr = (char *)ireq;
|
|
|
|
|
|
|
|
BUG_ON(requested_addr < base_addr);
|
|
|
|
BUG_ON((requested_addr - base_addr) >= sizeof(*ireq));
|
|
|
|
|
|
|
|
return ireq->request_daddr + (requested_addr - base_addr);
|
|
|
|
}
|
|
|
|
|
2011-07-03 13:56:22 +08:00
|
|
|
/**
|
|
|
|
* This function gets the status of the request object.
|
|
|
|
* @request: This parameter points to the isci_request object
|
|
|
|
*
|
|
|
|
* status of the object as a isci_request_status enum.
|
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
static inline enum isci_request_status
|
|
|
|
isci_request_get_state(struct isci_request *isci_request)
|
2011-07-03 13:56:22 +08:00
|
|
|
{
|
|
|
|
BUG_ON(isci_request == NULL);
|
|
|
|
|
|
|
|
/*probably a bad sign... */
|
|
|
|
if (isci_request->status == unallocated)
|
|
|
|
dev_warn(&isci_request->isci_host->pdev->dev,
|
|
|
|
"%s: isci_request->status == unallocated\n",
|
|
|
|
__func__);
|
|
|
|
|
|
|
|
return isci_request->status;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_request_change_state() - This function sets the status of the request
|
|
|
|
* object.
|
|
|
|
* @request: This parameter points to the isci_request object
|
|
|
|
* @status: This Parameter is the new status of the object
|
|
|
|
*
|
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
static inline enum isci_request_status
|
|
|
|
isci_request_change_state(struct isci_request *isci_request,
|
|
|
|
enum isci_request_status status)
|
2011-07-03 13:56:22 +08:00
|
|
|
{
|
|
|
|
enum isci_request_status old_state;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
dev_dbg(&isci_request->isci_host->pdev->dev,
|
|
|
|
"%s: isci_request = %p, state = 0x%x\n",
|
|
|
|
__func__,
|
|
|
|
isci_request,
|
|
|
|
status);
|
|
|
|
|
|
|
|
BUG_ON(isci_request == NULL);
|
|
|
|
|
|
|
|
spin_lock_irqsave(&isci_request->state_lock, flags);
|
|
|
|
old_state = isci_request->status;
|
|
|
|
isci_request->status = status;
|
|
|
|
spin_unlock_irqrestore(&isci_request->state_lock, flags);
|
|
|
|
|
|
|
|
return old_state;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_request_change_started_to_newstate() - This function sets the status of
|
|
|
|
* the request object.
|
|
|
|
* @request: This parameter points to the isci_request object
|
|
|
|
* @status: This Parameter is the new status of the object
|
|
|
|
*
|
|
|
|
* state previous to any change.
|
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
static inline enum isci_request_status
|
|
|
|
isci_request_change_started_to_newstate(struct isci_request *isci_request,
|
|
|
|
struct completion *completion_ptr,
|
|
|
|
enum isci_request_status newstate)
|
2011-07-03 13:56:22 +08:00
|
|
|
{
|
|
|
|
enum isci_request_status old_state;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&isci_request->state_lock, flags);
|
|
|
|
|
|
|
|
old_state = isci_request->status;
|
|
|
|
|
2011-04-01 04:10:34 +08:00
|
|
|
if (old_state == started || old_state == aborting) {
|
2011-07-03 13:56:22 +08:00
|
|
|
BUG_ON(isci_request->io_request_completion != NULL);
|
|
|
|
|
|
|
|
isci_request->io_request_completion = completion_ptr;
|
|
|
|
isci_request->status = newstate;
|
|
|
|
}
|
2011-06-02 08:10:43 +08:00
|
|
|
|
2011-07-03 13:56:22 +08:00
|
|
|
spin_unlock_irqrestore(&isci_request->state_lock, flags);
|
|
|
|
|
|
|
|
dev_dbg(&isci_request->isci_host->pdev->dev,
|
|
|
|
"%s: isci_request = %p, old_state = 0x%x\n",
|
|
|
|
__func__,
|
|
|
|
isci_request,
|
|
|
|
old_state);
|
|
|
|
|
|
|
|
return old_state;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_request_change_started_to_aborted() - This function sets the status of
|
|
|
|
* the request object.
|
|
|
|
* @request: This parameter points to the isci_request object
|
|
|
|
* @completion_ptr: This parameter is saved as the kernel completion structure
|
|
|
|
* signalled when the old request completes.
|
|
|
|
*
|
|
|
|
* state previous to any change.
|
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
static inline enum isci_request_status
|
|
|
|
isci_request_change_started_to_aborted(struct isci_request *isci_request,
|
|
|
|
struct completion *completion_ptr)
|
2011-07-03 13:56:22 +08:00
|
|
|
{
|
2011-06-02 08:10:43 +08:00
|
|
|
return isci_request_change_started_to_newstate(isci_request,
|
|
|
|
completion_ptr,
|
|
|
|
aborted);
|
2011-07-03 13:56:22 +08:00
|
|
|
}
|
|
|
|
/**
|
|
|
|
* isci_request_free() - This function frees the request object.
|
|
|
|
* @isci_host: This parameter specifies the ISCI host object
|
|
|
|
* @isci_request: This parameter points to the isci_request object
|
|
|
|
*
|
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
static inline void isci_request_free(struct isci_host *isci_host,
|
|
|
|
struct isci_request *isci_request)
|
2011-07-03 13:56:22 +08:00
|
|
|
{
|
2011-04-13 08:28:43 +08:00
|
|
|
if (!isci_request)
|
|
|
|
return;
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
/* release the dma memory if we fail. */
|
2011-06-02 08:10:43 +08:00
|
|
|
dma_pool_free(isci_host->dma_pool,
|
|
|
|
isci_request,
|
2011-07-03 13:56:22 +08:00
|
|
|
isci_request->request_daddr);
|
|
|
|
}
|
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
#define isci_request_access_task(req) ((req)->ttype_ptr.io_task_ptr)
|
2011-07-03 13:56:22 +08:00
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
#define isci_request_access_tmf(req) ((req)->ttype_ptr.tmf_task_ptr)
|
2011-07-03 13:56:22 +08:00
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
int isci_request_alloc_tmf(struct isci_host *isci_host,
|
|
|
|
struct isci_tmf *isci_tmf,
|
|
|
|
struct isci_request **isci_request,
|
|
|
|
struct isci_remote_device *isci_device,
|
|
|
|
gfp_t gfp_flags);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
int isci_request_execute(struct isci_host *isci_host,
|
|
|
|
struct sas_task *task,
|
|
|
|
struct isci_request **request,
|
|
|
|
gfp_t gfp_flags);
|
2011-07-03 13:56:22 +08:00
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_request_unmap_sgl() - This function unmaps the DMA address of a given
|
|
|
|
* sgl
|
|
|
|
* @request: This parameter points to the isci_request object
|
|
|
|
* @*pdev: This Parameter is the pci_device struct for the controller
|
|
|
|
*
|
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
static inline void
|
|
|
|
isci_request_unmap_sgl(struct isci_request *request, struct pci_dev *pdev)
|
2011-07-03 13:56:22 +08:00
|
|
|
{
|
|
|
|
struct sas_task *task = isci_request_access_task(request);
|
|
|
|
|
|
|
|
dev_dbg(&request->isci_host->pdev->dev,
|
|
|
|
"%s: request = %p, task = %p,\n"
|
|
|
|
"task->data_dir = %d, is_sata = %d\n ",
|
|
|
|
__func__,
|
|
|
|
request,
|
|
|
|
task,
|
|
|
|
task->data_dir,
|
|
|
|
sas_protocol_ata(task->task_proto));
|
|
|
|
|
|
|
|
if ((task->data_dir != PCI_DMA_NONE) &&
|
|
|
|
!sas_protocol_ata(task->task_proto)) {
|
|
|
|
if (task->num_scatter == 0)
|
|
|
|
/* 0 indicates a single dma address */
|
|
|
|
dma_unmap_single(
|
|
|
|
&pdev->dev,
|
|
|
|
request->zero_scatter_daddr,
|
|
|
|
task->total_xfer_len,
|
|
|
|
task->data_dir
|
|
|
|
);
|
|
|
|
|
|
|
|
else /* unmap the sgl dma addresses */
|
|
|
|
dma_unmap_sg(
|
|
|
|
&pdev->dev,
|
|
|
|
task->scatter,
|
|
|
|
request->num_sg_entries,
|
|
|
|
task->data_dir
|
|
|
|
);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* isci_request_io_request_get_next_sge() - This function is called by the sci
|
|
|
|
* core to retrieve the next sge for a given request.
|
|
|
|
* @request: This parameter is the isci_request object.
|
|
|
|
* @current_sge_address: This parameter is the last sge retrieved by the sci
|
|
|
|
* core for this request.
|
|
|
|
*
|
|
|
|
* pointer to the next sge for specified request.
|
|
|
|
*/
|
2011-06-02 08:10:43 +08:00
|
|
|
static inline void *
|
|
|
|
isci_request_io_request_get_next_sge(struct isci_request *request,
|
|
|
|
void *current_sge_address)
|
2011-07-03 13:56:22 +08:00
|
|
|
{
|
|
|
|
struct sas_task *task = isci_request_access_task(request);
|
|
|
|
void *ret = NULL;
|
|
|
|
|
|
|
|
dev_dbg(&request->isci_host->pdev->dev,
|
|
|
|
"%s: request = %p, "
|
|
|
|
"current_sge_address = %p, "
|
|
|
|
"num_scatter = %d\n",
|
|
|
|
__func__,
|
|
|
|
request,
|
|
|
|
current_sge_address,
|
|
|
|
task->num_scatter);
|
|
|
|
|
|
|
|
if (!current_sge_address) /* First time through.. */
|
|
|
|
ret = task->scatter; /* always task->scatter */
|
|
|
|
else if (task->num_scatter == 0) /* Next element, if num_scatter == 0 */
|
|
|
|
ret = NULL; /* there is only one element. */
|
|
|
|
else
|
|
|
|
ret = sg_next(current_sge_address); /* sg_next returns NULL
|
|
|
|
* for the last element
|
|
|
|
*/
|
|
|
|
|
|
|
|
dev_dbg(&request->isci_host->pdev->dev,
|
|
|
|
"%s: next sge address = %p\n",
|
|
|
|
__func__,
|
|
|
|
ret);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2011-06-02 08:10:43 +08:00
|
|
|
void
|
|
|
|
isci_terminate_pending_requests(struct isci_host *isci_host,
|
|
|
|
struct isci_remote_device *isci_device,
|
|
|
|
enum isci_request_status new_request_state);
|
|
|
|
enum sci_status
|
|
|
|
scic_task_request_construct(struct scic_sds_controller *scic,
|
|
|
|
struct scic_sds_remote_device *sci_dev,
|
|
|
|
u16 io_tag,
|
|
|
|
struct scic_sds_request *sci_req);
|
|
|
|
enum sci_status
|
|
|
|
scic_task_request_construct_ssp(struct scic_sds_request *sci_req);
|
|
|
|
enum sci_status
|
|
|
|
scic_task_request_construct_sata(struct scic_sds_request *sci_req);
|
|
|
|
void
|
|
|
|
scic_stp_io_request_set_ncq_tag(struct scic_sds_request *sci_req, u16 ncq_tag);
|
2011-05-10 17:28:45 +08:00
|
|
|
void scic_sds_smp_request_copy_response(struct scic_sds_request *sci_req);
|
2011-07-03 13:56:22 +08:00
|
|
|
#endif /* !defined(_ISCI_REQUEST_H_) */
|