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6f231dda DW |
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 "isci.h" | |
88f3b62a | 57 | #include "remote_device.h" |
6f231dda DW |
58 | #include "scic_io_request.h" |
59 | #include "scic_task_request.h" | |
60 | #include "task.h" | |
61 | #include "request.h" | |
62 | #include "sata.h" | |
63 | #include "intel_sat.h" | |
64 | #include "intel_ata.h" | |
65 | ||
66 | static u8 isci_sata_get_management_task_protocol(struct isci_tmf *tmf); | |
67 | ||
68 | ||
69 | /** | |
70 | * isci_sata_task_to_fis_copy() - This function gets the host_to_dev_fis from | |
71 | * the core and copies the fis from the task into it. | |
72 | * @task: This parameter is a pointer to the task struct from libsas. | |
73 | * | |
74 | * pointer to the host_to_dev_fis from the core request object. | |
75 | */ | |
76 | struct host_to_dev_fis *isci_sata_task_to_fis_copy(struct sas_task *task) | |
77 | { | |
78 | struct isci_request *request = task->lldd_task; | |
79 | struct host_to_dev_fis *register_fis = | |
80 | scic_stp_io_request_get_h2d_reg_address( | |
81 | request->sci_request_handle | |
82 | ); | |
83 | ||
84 | memcpy( | |
85 | (u8 *)register_fis, | |
86 | (u8 *)&task->ata_task.fis, | |
87 | sizeof(struct host_to_dev_fis) | |
88 | ); | |
89 | ||
90 | if (!task->ata_task.device_control_reg_update) | |
91 | register_fis->flags |= 0x80; | |
92 | ||
93 | register_fis->flags &= 0xF0; | |
94 | ||
95 | return register_fis; | |
96 | } | |
97 | ||
98 | /** | |
99 | * isci_sata_is_task_ncq() - This function determines if the given stp task is | |
100 | * a ncq request. | |
101 | * @task: This parameter is a pointer to the task struct from libsas. | |
102 | * | |
103 | * true if the task is ncq | |
104 | */ | |
105 | bool isci_sata_is_task_ncq(struct sas_task *task) | |
106 | { | |
107 | struct ata_queued_cmd *qc = task->uldd_task; | |
108 | ||
109 | bool ret = (qc && | |
110 | (qc->tf.command == ATA_CMD_FPDMA_WRITE || | |
111 | qc->tf.command == ATA_CMD_FPDMA_READ)); | |
112 | ||
113 | return ret; | |
114 | } | |
115 | ||
116 | /** | |
117 | * isci_sata_set_ncq_tag() - This function sets the ncq tag field in the | |
118 | * host_to_dev_fis equal to the tag in the queue command in the task. | |
119 | * @task: This parameter is a pointer to the task struct from libsas. | |
120 | * @register_fis: This parameter is a pointer to the host_to_dev_fis from the | |
121 | * core request object. | |
122 | * | |
123 | */ | |
124 | void isci_sata_set_ncq_tag( | |
125 | struct host_to_dev_fis *register_fis, | |
126 | struct sas_task *task) | |
127 | { | |
128 | struct ata_queued_cmd *qc = task->uldd_task; | |
129 | struct isci_request *request = task->lldd_task; | |
130 | ||
131 | register_fis->sector_count = qc->tag << 3; | |
132 | scic_stp_io_request_set_ncq_tag(request->sci_request_handle, qc->tag); | |
133 | } | |
134 | ||
135 | /** | |
136 | * isci_request_process_stp_response() - This function sets the status and | |
137 | * response, in the task struct, from the request object for the upper layer | |
138 | * driver. | |
139 | * @sas_task: This parameter is the task struct from the upper layer driver. | |
140 | * @response_buffer: This parameter points to the response of the completed | |
141 | * request. | |
142 | * | |
143 | * none. | |
144 | */ | |
145 | void isci_request_process_stp_response( | |
146 | struct sas_task *task, | |
147 | void *response_buffer) | |
148 | { | |
149 | struct sata_fis_reg_d2h *d2h_reg_fis = (struct sata_fis_reg_d2h *)response_buffer; | |
150 | struct task_status_struct *ts = &task->task_status; | |
151 | struct ata_task_resp *resp = (void *)&ts->buf[0]; | |
152 | ||
153 | resp->frame_len = le16_to_cpu(*(__le16 *)(response_buffer + 6)); | |
154 | memcpy(&resp->ending_fis[0], response_buffer + 16, 24); | |
155 | ts->buf_valid_size = sizeof(*resp); | |
156 | ||
157 | /** | |
158 | * If the device fault bit is set in the status register, then | |
159 | * set the sense data and return. | |
160 | */ | |
161 | if (d2h_reg_fis->status & ATA_STATUS_REG_DEVICE_FAULT_BIT) | |
162 | ts->stat = SAS_PROTO_RESPONSE; | |
163 | else | |
164 | ts->stat = SAM_STAT_GOOD; | |
165 | ||
166 | ts->resp = SAS_TASK_COMPLETE; | |
167 | } | |
168 | ||
169 | /** | |
170 | * isci_sata_get_sat_protocol() - retrieve the sat protocol for the request | |
171 | * @isci_request: ata request | |
172 | * | |
173 | * Note: temporary implementation until expert mode removes the callback | |
174 | * | |
175 | */ | |
176 | u8 isci_sata_get_sat_protocol(struct isci_request *isci_request) | |
177 | { | |
178 | struct sas_task *task; | |
179 | struct domain_device *dev; | |
180 | ||
181 | dev_dbg(&isci_request->isci_host->pdev->dev, | |
182 | "%s: isci_request = %p, ttype = %d\n", | |
183 | __func__, isci_request, isci_request->ttype); | |
184 | ||
185 | if (tmf_task == isci_request->ttype) { | |
186 | struct isci_tmf *tmf = isci_request_access_tmf(isci_request); | |
187 | ||
188 | return isci_sata_get_management_task_protocol(tmf); | |
189 | } | |
190 | ||
191 | task = isci_request_access_task(isci_request); | |
192 | dev = task->dev; | |
193 | ||
194 | if (!sas_protocol_ata(task->task_proto)) { | |
195 | WARN(1, "unhandled task protocol\n"); | |
196 | return SAT_PROTOCOL_NON_DATA; | |
197 | } | |
198 | ||
199 | if (task->data_dir == DMA_NONE) | |
200 | return SAT_PROTOCOL_NON_DATA; | |
201 | ||
202 | /* the "_IN" protocol types are equivalent to their "_OUT" | |
203 | * analogs as far as the core is concerned | |
204 | */ | |
205 | if (dev->sata_dev.command_set == ATAPI_COMMAND_SET) { | |
206 | if (task->ata_task.dma_xfer) | |
207 | return SAT_PROTOCOL_PACKET_DMA_DATA_IN; | |
208 | else | |
209 | return SAT_PROTOCOL_PACKET_PIO_DATA_IN; | |
210 | } | |
211 | ||
212 | if (task->ata_task.use_ncq) | |
213 | return SAT_PROTOCOL_FPDMA; | |
214 | ||
215 | if (task->ata_task.dma_xfer) | |
216 | return SAT_PROTOCOL_UDMA_DATA_IN; | |
217 | else | |
218 | return SAT_PROTOCOL_PIO_DATA_IN; | |
219 | } | |
220 | ||
221 | static u8 isci_sata_get_management_task_protocol( | |
222 | struct isci_tmf *tmf) | |
223 | { | |
224 | u8 ret = 0; | |
225 | ||
226 | pr_warn("tmf = %p, func = %d\n", tmf, tmf->tmf_code); | |
227 | ||
228 | if ((tmf->tmf_code == isci_tmf_sata_srst_high) || | |
229 | (tmf->tmf_code == isci_tmf_sata_srst_low)) { | |
230 | pr_warn("%s: tmf->tmf_code == TMF_LU_RESET\n", __func__); | |
231 | ret = SAT_PROTOCOL_SOFT_RESET; | |
232 | } | |
233 | ||
234 | return ret; | |
235 | } | |
236 | ||
237 | enum sci_status isci_sata_management_task_request_build( | |
238 | struct isci_request *isci_request) | |
239 | { | |
240 | struct isci_tmf *isci_tmf; | |
241 | enum sci_status status; | |
242 | ||
243 | if (tmf_task != isci_request->ttype) | |
244 | return SCI_FAILURE; | |
245 | ||
246 | isci_tmf = isci_request_access_tmf(isci_request); | |
247 | ||
248 | switch (isci_tmf->tmf_code) { | |
249 | ||
250 | case isci_tmf_sata_srst_high: | |
251 | case isci_tmf_sata_srst_low: | |
252 | { | |
253 | struct host_to_dev_fis *register_fis = | |
254 | scic_stp_io_request_get_h2d_reg_address( | |
255 | isci_request->sci_request_handle | |
256 | ); | |
257 | ||
258 | memset(register_fis, 0, sizeof(*register_fis)); | |
259 | ||
260 | register_fis->fis_type = 0x27; | |
261 | register_fis->flags &= ~0x80; | |
262 | register_fis->flags &= 0xF0; | |
263 | if (isci_tmf->tmf_code == isci_tmf_sata_srst_high) | |
264 | register_fis->control |= ATA_SRST; | |
265 | else | |
266 | register_fis->control &= ~ATA_SRST; | |
267 | break; | |
268 | } | |
269 | /* other management commnd go here... */ | |
270 | default: | |
271 | return SCI_FAILURE; | |
272 | } | |
273 | ||
274 | /* core builds the protocol specific request | |
275 | * based on the h2d fis. | |
276 | */ | |
277 | status = scic_task_request_construct_sata( | |
278 | isci_request->sci_request_handle | |
279 | ); | |
280 | ||
281 | return status; | |
282 | } | |
283 | ||
284 | /** | |
285 | * isci_task_send_lu_reset_sata() - This function is called by of the SAS | |
286 | * Domain Template functions. This is one of the Task Management functoins | |
287 | * called by libsas, to reset the given SAS lun. Note the assumption that | |
288 | * while this call is executing, no I/O will be sent by the host to the | |
289 | * device. | |
290 | * @lun: This parameter specifies the lun to be reset. | |
291 | * | |
292 | * status, zero indicates success. | |
293 | */ | |
294 | int isci_task_send_lu_reset_sata( | |
295 | struct isci_host *isci_host, | |
296 | struct isci_remote_device *isci_device, | |
297 | u8 *lun) | |
298 | { | |
299 | struct isci_tmf tmf; | |
300 | int ret = TMF_RESP_FUNC_FAILED; | |
6f231dda | 301 | |
26e953bc JS |
302 | /* Send the soft reset to the target */ |
303 | #define ISCI_SRST_TIMEOUT_MS 25000 /* 25 second timeout. */ | |
6f231dda DW |
304 | isci_task_build_tmf(&tmf, isci_device, isci_tmf_sata_srst_high, |
305 | NULL, NULL | |
306 | ); | |
307 | ||
308 | ret = isci_task_execute_tmf(isci_host, &tmf, ISCI_SRST_TIMEOUT_MS); | |
309 | ||
310 | if (ret != TMF_RESP_FUNC_COMPLETE) { | |
311 | dev_warn(&isci_host->pdev->dev, | |
312 | "%s: Assert SRST failed (%p) = %x", | |
313 | __func__, | |
314 | isci_device, | |
315 | ret); | |
316 | ||
317 | /* Return the failure so that the LUN reset is escalated | |
318 | * to a target reset. | |
319 | */ | |
6f231dda | 320 | } |
6f231dda DW |
321 | return ret; |
322 | } |