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-rw-r--r--drivers/scsi/isci/sata.c232
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diff --git a/drivers/scsi/isci/sata.c b/drivers/scsi/isci/sata.c
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--- a/drivers/scsi/isci/sata.c
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1/*
2 * This file is provided under a dual BSD/GPLv2 license. When using or
3 * redistributing this file, you may do so under either license.
4 *
5 * GPL LICENSE SUMMARY
6 *
7 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
23 *
24 * BSD LICENSE
25 *
26 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
27 * All rights reserved.
28 *
29 * Redistribution and use in source and binary forms, with or without
30 * modification, are permitted provided that the following conditions
31 * are met:
32 *
33 * * Redistributions of source code must retain the above copyright
34 * notice, this list of conditions and the following disclaimer.
35 * * Redistributions in binary form must reproduce the above copyright
36 * notice, this list of conditions and the following disclaimer in
37 * the documentation and/or other materials provided with the
38 * distribution.
39 * * Neither the name of Intel Corporation nor the names of its
40 * contributors may be used to endorse or promote products derived
41 * from this software without specific prior written permission.
42 *
43 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
44 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
45 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
46 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
47 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
49 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
50 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
51 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
52 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54 */
55
56#include <scsi/sas.h>
57#include "isci.h"
58#include "remote_device.h"
59#include "task.h"
60#include "request.h"
61#include "sata.h"
62
63/**
64 * isci_sata_task_to_fis_copy() - This function gets the host_to_dev_fis from
65 * the core and copies the fis from the task into it.
66 * @task: This parameter is a pointer to the task struct from libsas.
67 *
68 * pointer to the host_to_dev_fis from the core request object.
69 */
70struct host_to_dev_fis *isci_sata_task_to_fis_copy(struct sas_task *task)
71{
72 struct isci_request *ireq = task->lldd_task;
73 struct host_to_dev_fis *fis = &ireq->stp.cmd;
74
75 memcpy(fis, &task->ata_task.fis, sizeof(struct host_to_dev_fis));
76
77 if (!task->ata_task.device_control_reg_update)
78 fis->flags |= 0x80;
79
80 fis->flags &= 0xF0;
81
82 return fis;
83}
84
85/**
86 * isci_sata_is_task_ncq() - This function determines if the given stp task is
87 * a ncq request.
88 * @task: This parameter is a pointer to the task struct from libsas.
89 *
90 * true if the task is ncq
91 */
92bool isci_sata_is_task_ncq(struct sas_task *task)
93{
94 struct ata_queued_cmd *qc = task->uldd_task;
95
96 bool ret = (qc &&
97 (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
98 qc->tf.command == ATA_CMD_FPDMA_READ));
99
100 return ret;
101}
102
103/**
104 * isci_sata_set_ncq_tag() - This function sets the ncq tag field in the
105 * host_to_dev_fis equal to the tag in the queue command in the task.
106 * @task: This parameter is a pointer to the task struct from libsas.
107 * @register_fis: This parameter is a pointer to the host_to_dev_fis from the
108 * core request object.
109 *
110 */
111void isci_sata_set_ncq_tag(
112 struct host_to_dev_fis *register_fis,
113 struct sas_task *task)
114{
115 struct ata_queued_cmd *qc = task->uldd_task;
116 struct isci_request *request = task->lldd_task;
117
118 register_fis->sector_count = qc->tag << 3;
119 sci_stp_io_request_set_ncq_tag(request, qc->tag);
120}
121
122/**
123 * isci_request_process_stp_response() - This function sets the status and
124 * response, in the task struct, from the request object for the upper layer
125 * driver.
126 * @sas_task: This parameter is the task struct from the upper layer driver.
127 * @response_buffer: This parameter points to the response of the completed
128 * request.
129 *
130 * none.
131 */
132void isci_request_process_stp_response(struct sas_task *task,
133 void *response_buffer)
134{
135 struct dev_to_host_fis *d2h_reg_fis = response_buffer;
136 struct task_status_struct *ts = &task->task_status;
137 struct ata_task_resp *resp = (void *)&ts->buf[0];
138
139 resp->frame_len = le16_to_cpu(*(__le16 *)(response_buffer + 6));
140 memcpy(&resp->ending_fis[0], response_buffer + 16, 24);
141 ts->buf_valid_size = sizeof(*resp);
142
143 /**
144 * If the device fault bit is set in the status register, then
145 * set the sense data and return.
146 */
147 if (d2h_reg_fis->status & ATA_DF)
148 ts->stat = SAS_PROTO_RESPONSE;
149 else
150 ts->stat = SAM_STAT_GOOD;
151
152 ts->resp = SAS_TASK_COMPLETE;
153}
154
155enum sci_status isci_sata_management_task_request_build(struct isci_request *ireq)
156{
157 struct isci_tmf *isci_tmf;
158 enum sci_status status;
159
160 if (tmf_task != ireq->ttype)
161 return SCI_FAILURE;
162
163 isci_tmf = isci_request_access_tmf(ireq);
164
165 switch (isci_tmf->tmf_code) {
166
167 case isci_tmf_sata_srst_high:
168 case isci_tmf_sata_srst_low: {
169 struct host_to_dev_fis *fis = &ireq->stp.cmd;
170
171 memset(fis, 0, sizeof(*fis));
172
173 fis->fis_type = 0x27;
174 fis->flags &= ~0x80;
175 fis->flags &= 0xF0;
176 if (isci_tmf->tmf_code == isci_tmf_sata_srst_high)
177 fis->control |= ATA_SRST;
178 else
179 fis->control &= ~ATA_SRST;
180 break;
181 }
182 /* other management commnd go here... */
183 default:
184 return SCI_FAILURE;
185 }
186
187 /* core builds the protocol specific request
188 * based on the h2d fis.
189 */
190 status = sci_task_request_construct_sata(ireq);
191
192 return status;
193}
194
195/**
196 * isci_task_send_lu_reset_sata() - This function is called by of the SAS
197 * Domain Template functions. This is one of the Task Management functoins
198 * called by libsas, to reset the given SAS lun. Note the assumption that
199 * while this call is executing, no I/O will be sent by the host to the
200 * device.
201 * @lun: This parameter specifies the lun to be reset.
202 *
203 * status, zero indicates success.
204 */
205int isci_task_send_lu_reset_sata(
206 struct isci_host *isci_host,
207 struct isci_remote_device *isci_device,
208 u8 *lun)
209{
210 struct isci_tmf tmf;
211 int ret = TMF_RESP_FUNC_FAILED;
212
213 /* Send the soft reset to the target */
214 #define ISCI_SRST_TIMEOUT_MS 25000 /* 25 second timeout. */
215 isci_task_build_tmf(&tmf, isci_tmf_sata_srst_high, NULL, NULL);
216
217 ret = isci_task_execute_tmf(isci_host, isci_device, &tmf,
218 ISCI_SRST_TIMEOUT_MS);
219
220 if (ret != TMF_RESP_FUNC_COMPLETE) {
221 dev_warn(&isci_host->pdev->dev,
222 "%s: Assert SRST failed (%p) = %x",
223 __func__,
224 isci_device,
225 ret);
226
227 /* Return the failure so that the LUN reset is escalated
228 * to a target reset.
229 */
230 }
231 return ret;
232}