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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" | |
6f231dda DW |
57 | #include "task.h" |
58 | #include "request.h" | |
59 | #include "sata.h" | |
60 | #include "scu_completion_codes.h" | |
2ec53eb4 | 61 | #include "sas.h" |
6f231dda | 62 | |
f1f52e75 DW |
63 | /** |
64 | * This method returns the sgl element pair for the specificed sgl_pair index. | |
65 | * @sci_req: This parameter specifies the IO request for which to retrieve | |
66 | * the Scatter-Gather List element pair. | |
67 | * @sgl_pair_index: This parameter specifies the index into the SGL element | |
68 | * pair to be retrieved. | |
69 | * | |
70 | * This method returns a pointer to an struct scu_sgl_element_pair. | |
71 | */ | |
72 | static struct scu_sgl_element_pair *scic_sds_request_get_sgl_element_pair( | |
73 | struct scic_sds_request *sci_req, | |
74 | u32 sgl_pair_index | |
75 | ) { | |
76 | struct scu_task_context *task_context; | |
77 | ||
78 | task_context = (struct scu_task_context *)sci_req->task_context_buffer; | |
79 | ||
80 | if (sgl_pair_index == 0) { | |
81 | return &task_context->sgl_pair_ab; | |
82 | } else if (sgl_pair_index == 1) { | |
83 | return &task_context->sgl_pair_cd; | |
84 | } | |
6f231dda | 85 | |
f1f52e75 | 86 | return &sci_req->sg_table[sgl_pair_index - 2]; |
6f231dda DW |
87 | } |
88 | ||
f1f52e75 DW |
89 | /** |
90 | * This function will build the SGL list for an IO request. | |
91 | * @sci_req: This parameter specifies the IO request for which to build | |
92 | * the Scatter-Gather List. | |
93 | * | |
94 | */ | |
95 | void scic_sds_request_build_sgl(struct scic_sds_request *sds_request) | |
6f231dda | 96 | { |
f1f52e75 DW |
97 | struct isci_request *isci_request = sci_req_to_ireq(sds_request); |
98 | struct isci_host *isci_host = isci_request->isci_host; | |
99 | struct sas_task *task = isci_request_access_task(isci_request); | |
100 | struct scatterlist *sg = NULL; | |
101 | dma_addr_t dma_addr; | |
102 | u32 sg_idx = 0; | |
103 | struct scu_sgl_element_pair *scu_sg = NULL; | |
104 | struct scu_sgl_element_pair *prev_sg = NULL; | |
105 | ||
106 | if (task->num_scatter > 0) { | |
107 | sg = task->scatter; | |
108 | ||
109 | while (sg) { | |
110 | scu_sg = scic_sds_request_get_sgl_element_pair( | |
111 | sds_request, | |
112 | sg_idx); | |
113 | ||
114 | SCU_SGL_COPY(scu_sg->A, sg); | |
115 | ||
116 | sg = sg_next(sg); | |
117 | ||
118 | if (sg) { | |
119 | SCU_SGL_COPY(scu_sg->B, sg); | |
120 | sg = sg_next(sg); | |
121 | } else | |
122 | SCU_SGL_ZERO(scu_sg->B); | |
123 | ||
124 | if (prev_sg) { | |
125 | dma_addr = | |
126 | scic_io_request_get_dma_addr( | |
127 | sds_request, | |
128 | scu_sg); | |
129 | ||
130 | prev_sg->next_pair_upper = | |
131 | upper_32_bits(dma_addr); | |
132 | prev_sg->next_pair_lower = | |
133 | lower_32_bits(dma_addr); | |
134 | } | |
135 | ||
136 | prev_sg = scu_sg; | |
137 | sg_idx++; | |
138 | } | |
139 | } else { /* handle when no sg */ | |
140 | scu_sg = scic_sds_request_get_sgl_element_pair(sds_request, | |
141 | sg_idx); | |
6f231dda | 142 | |
f1f52e75 DW |
143 | dma_addr = dma_map_single(&isci_host->pdev->dev, |
144 | task->scatter, | |
145 | task->total_xfer_len, | |
146 | task->data_dir); | |
6f231dda | 147 | |
f1f52e75 | 148 | isci_request->zero_scatter_daddr = dma_addr; |
6f231dda | 149 | |
f1f52e75 DW |
150 | scu_sg->A.length = task->total_xfer_len; |
151 | scu_sg->A.address_upper = upper_32_bits(dma_addr); | |
152 | scu_sg->A.address_lower = lower_32_bits(dma_addr); | |
153 | } | |
6f231dda | 154 | |
f1f52e75 DW |
155 | if (scu_sg) { |
156 | scu_sg->next_pair_upper = 0; | |
157 | scu_sg->next_pair_lower = 0; | |
6f231dda | 158 | } |
f1f52e75 | 159 | } |
6f231dda | 160 | |
f1f52e75 DW |
161 | static void scic_sds_ssp_io_request_assign_buffers(struct scic_sds_request *sci_req) |
162 | { | |
163 | if (sci_req->was_tag_assigned_by_user == false) | |
164 | sci_req->task_context_buffer = &sci_req->tc; | |
6f231dda DW |
165 | } |
166 | ||
f1f52e75 | 167 | static void scic_sds_io_request_build_ssp_command_iu(struct scic_sds_request *sci_req) |
6f231dda | 168 | { |
f1f52e75 DW |
169 | struct ssp_cmd_iu *cmd_iu; |
170 | struct isci_request *ireq = sci_req_to_ireq(sci_req); | |
2ec53eb4 | 171 | struct sas_task *task = isci_request_access_task(ireq); |
6f231dda | 172 | |
f1f52e75 | 173 | cmd_iu = &sci_req->ssp.cmd; |
6f231dda | 174 | |
f1f52e75 DW |
175 | memcpy(cmd_iu->LUN, task->ssp_task.LUN, 8); |
176 | cmd_iu->add_cdb_len = 0; | |
177 | cmd_iu->_r_a = 0; | |
178 | cmd_iu->_r_b = 0; | |
179 | cmd_iu->en_fburst = 0; /* unsupported */ | |
180 | cmd_iu->task_prio = task->ssp_task.task_prio; | |
181 | cmd_iu->task_attr = task->ssp_task.task_attr; | |
182 | cmd_iu->_r_c = 0; | |
6f231dda | 183 | |
f1f52e75 DW |
184 | sci_swab32_cpy(&cmd_iu->cdb, task->ssp_task.cdb, |
185 | sizeof(task->ssp_task.cdb) / sizeof(u32)); | |
186 | } | |
6f231dda | 187 | |
f1f52e75 DW |
188 | static void scic_sds_task_request_build_ssp_task_iu(struct scic_sds_request *sci_req) |
189 | { | |
190 | struct ssp_task_iu *task_iu; | |
191 | struct isci_request *ireq = sci_req_to_ireq(sci_req); | |
192 | struct sas_task *task = isci_request_access_task(ireq); | |
193 | struct isci_tmf *isci_tmf = isci_request_access_tmf(ireq); | |
6f231dda | 194 | |
f1f52e75 DW |
195 | task_iu = &sci_req->ssp.tmf; |
196 | ||
197 | memset(task_iu, 0, sizeof(struct ssp_task_iu)); | |
198 | ||
199 | memcpy(task_iu->LUN, task->ssp_task.LUN, 8); | |
200 | ||
201 | task_iu->task_func = isci_tmf->tmf_code; | |
202 | task_iu->task_tag = | |
203 | (ireq->ttype == tmf_task) ? | |
204 | isci_tmf->io_tag : | |
205 | SCI_CONTROLLER_INVALID_IO_TAG; | |
6f231dda DW |
206 | } |
207 | ||
208 | /** | |
f1f52e75 DW |
209 | * This method is will fill in the SCU Task Context for any type of SSP request. |
210 | * @sci_req: | |
211 | * @task_context: | |
6f231dda | 212 | * |
6f231dda | 213 | */ |
f1f52e75 DW |
214 | static void scu_ssp_reqeust_construct_task_context( |
215 | struct scic_sds_request *sds_request, | |
216 | struct scu_task_context *task_context) | |
6f231dda | 217 | { |
f1f52e75 DW |
218 | dma_addr_t dma_addr; |
219 | struct scic_sds_controller *controller; | |
220 | struct scic_sds_remote_device *target_device; | |
221 | struct scic_sds_port *target_port; | |
222 | ||
223 | controller = scic_sds_request_get_controller(sds_request); | |
224 | target_device = scic_sds_request_get_device(sds_request); | |
225 | target_port = scic_sds_request_get_port(sds_request); | |
226 | ||
227 | /* Fill in the TC with the its required data */ | |
228 | task_context->abort = 0; | |
229 | task_context->priority = 0; | |
230 | task_context->initiator_request = 1; | |
231 | task_context->connection_rate = target_device->connection_rate; | |
232 | task_context->protocol_engine_index = | |
233 | scic_sds_controller_get_protocol_engine_group(controller); | |
234 | task_context->logical_port_index = | |
235 | scic_sds_port_get_index(target_port); | |
236 | task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP; | |
237 | task_context->valid = SCU_TASK_CONTEXT_VALID; | |
238 | task_context->context_type = SCU_TASK_CONTEXT_TYPE; | |
239 | ||
240 | task_context->remote_node_index = | |
241 | scic_sds_remote_device_get_index(sds_request->target_device); | |
242 | task_context->command_code = 0; | |
243 | ||
244 | task_context->link_layer_control = 0; | |
245 | task_context->do_not_dma_ssp_good_response = 1; | |
246 | task_context->strict_ordering = 0; | |
247 | task_context->control_frame = 0; | |
248 | task_context->timeout_enable = 0; | |
249 | task_context->block_guard_enable = 0; | |
250 | ||
251 | task_context->address_modifier = 0; | |
252 | ||
253 | /* task_context->type.ssp.tag = sci_req->io_tag; */ | |
254 | task_context->task_phase = 0x01; | |
255 | ||
256 | if (sds_request->was_tag_assigned_by_user) { | |
257 | /* | |
258 | * Build the task context now since we have already read | |
259 | * the data | |
260 | */ | |
261 | sds_request->post_context = | |
262 | (SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC | | |
263 | (scic_sds_controller_get_protocol_engine_group( | |
264 | controller) << | |
265 | SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) | | |
266 | (scic_sds_port_get_index(target_port) << | |
267 | SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) | | |
268 | scic_sds_io_tag_get_index(sds_request->io_tag)); | |
269 | } else { | |
270 | /* | |
271 | * Build the task context now since we have already read | |
272 | * the data | |
273 | * | |
274 | * I/O tag index is not assigned because we have to wait | |
275 | * until we get a TCi | |
276 | */ | |
277 | sds_request->post_context = | |
278 | (SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC | | |
279 | (scic_sds_controller_get_protocol_engine_group( | |
280 | owning_controller) << | |
281 | SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) | | |
282 | (scic_sds_port_get_index(target_port) << | |
283 | SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT)); | |
284 | } | |
6f231dda | 285 | |
f1f52e75 DW |
286 | /* |
287 | * Copy the physical address for the command buffer to the | |
288 | * SCU Task Context | |
289 | */ | |
290 | dma_addr = scic_io_request_get_dma_addr(sds_request, | |
291 | &sds_request->ssp.cmd); | |
6f231dda | 292 | |
f1f52e75 DW |
293 | task_context->command_iu_upper = upper_32_bits(dma_addr); |
294 | task_context->command_iu_lower = lower_32_bits(dma_addr); | |
295 | ||
296 | /* | |
297 | * Copy the physical address for the response buffer to the | |
298 | * SCU Task Context | |
6f231dda | 299 | */ |
f1f52e75 DW |
300 | dma_addr = scic_io_request_get_dma_addr(sds_request, |
301 | &sds_request->ssp.rsp); | |
6f231dda | 302 | |
f1f52e75 DW |
303 | task_context->response_iu_upper = upper_32_bits(dma_addr); |
304 | task_context->response_iu_lower = lower_32_bits(dma_addr); | |
305 | } | |
6f231dda | 306 | |
f1f52e75 DW |
307 | /** |
308 | * This method is will fill in the SCU Task Context for a SSP IO request. | |
309 | * @sci_req: | |
310 | * | |
311 | */ | |
312 | static void scu_ssp_io_request_construct_task_context( | |
313 | struct scic_sds_request *sci_req, | |
314 | enum dma_data_direction dir, | |
315 | u32 len) | |
316 | { | |
317 | struct scu_task_context *task_context; | |
6f231dda | 318 | |
f1f52e75 | 319 | task_context = scic_sds_request_get_task_context(sci_req); |
6f231dda | 320 | |
f1f52e75 | 321 | scu_ssp_reqeust_construct_task_context(sci_req, task_context); |
6f231dda | 322 | |
f1f52e75 DW |
323 | task_context->ssp_command_iu_length = |
324 | sizeof(struct ssp_cmd_iu) / sizeof(u32); | |
325 | task_context->type.ssp.frame_type = SSP_COMMAND; | |
326 | ||
327 | switch (dir) { | |
328 | case DMA_FROM_DEVICE: | |
329 | case DMA_NONE: | |
330 | default: | |
331 | task_context->task_type = SCU_TASK_TYPE_IOREAD; | |
a1a113b0 | 332 | break; |
f1f52e75 DW |
333 | case DMA_TO_DEVICE: |
334 | task_context->task_type = SCU_TASK_TYPE_IOWRITE; | |
a1a113b0 | 335 | break; |
6f231dda DW |
336 | } |
337 | ||
f1f52e75 DW |
338 | task_context->transfer_length_bytes = len; |
339 | ||
340 | if (task_context->transfer_length_bytes > 0) | |
341 | scic_sds_request_build_sgl(sci_req); | |
6f231dda DW |
342 | } |
343 | ||
f1f52e75 DW |
344 | static void scic_sds_ssp_task_request_assign_buffers(struct scic_sds_request *sci_req) |
345 | { | |
346 | if (sci_req->was_tag_assigned_by_user == false) | |
347 | sci_req->task_context_buffer = &sci_req->tc; | |
348 | } | |
6f231dda DW |
349 | |
350 | /** | |
f1f52e75 DW |
351 | * This method will fill in the SCU Task Context for a SSP Task request. The |
352 | * following important settings are utilized: -# priority == | |
353 | * SCU_TASK_PRIORITY_HIGH. This ensures that the task request is issued | |
354 | * ahead of other task destined for the same Remote Node. -# task_type == | |
355 | * SCU_TASK_TYPE_IOREAD. This simply indicates that a normal request type | |
356 | * (i.e. non-raw frame) is being utilized to perform task management. -# | |
357 | * control_frame == 1. This ensures that the proper endianess is set so | |
358 | * that the bytes are transmitted in the right order for a task frame. | |
359 | * @sci_req: This parameter specifies the task request object being | |
360 | * constructed. | |
6f231dda | 361 | * |
6f231dda | 362 | */ |
f1f52e75 DW |
363 | static void scu_ssp_task_request_construct_task_context( |
364 | struct scic_sds_request *sci_req) | |
6f231dda | 365 | { |
f1f52e75 | 366 | struct scu_task_context *task_context; |
6f231dda | 367 | |
f1f52e75 | 368 | task_context = scic_sds_request_get_task_context(sci_req); |
6f231dda | 369 | |
f1f52e75 | 370 | scu_ssp_reqeust_construct_task_context(sci_req, task_context); |
6f231dda | 371 | |
f1f52e75 DW |
372 | task_context->control_frame = 1; |
373 | task_context->priority = SCU_TASK_PRIORITY_HIGH; | |
374 | task_context->task_type = SCU_TASK_TYPE_RAW_FRAME; | |
375 | task_context->transfer_length_bytes = 0; | |
376 | task_context->type.ssp.frame_type = SSP_TASK; | |
377 | task_context->ssp_command_iu_length = | |
378 | sizeof(struct ssp_task_iu) / sizeof(u32); | |
6f231dda DW |
379 | } |
380 | ||
6f231dda | 381 | |
f1f52e75 DW |
382 | /** |
383 | * This method constructs the SSP Command IU data for this ssp passthrough | |
384 | * comand request object. | |
385 | * @sci_req: This parameter specifies the request object for which the SSP | |
386 | * command information unit is being built. | |
387 | * | |
388 | * enum sci_status, returns invalid parameter is cdb > 16 | |
389 | */ | |
6f231dda | 390 | |
6f231dda DW |
391 | |
392 | /** | |
f1f52e75 DW |
393 | * This method constructs the SATA request object. |
394 | * @sci_req: | |
395 | * @sat_protocol: | |
396 | * @transfer_length: | |
397 | * @data_direction: | |
398 | * @copy_rx_frame: | |
6f231dda | 399 | * |
f1f52e75 | 400 | * enum sci_status |
6f231dda | 401 | */ |
f1f52e75 DW |
402 | static enum sci_status |
403 | scic_io_request_construct_sata(struct scic_sds_request *sci_req, | |
404 | u32 len, | |
405 | enum dma_data_direction dir, | |
406 | bool copy) | |
6f231dda | 407 | { |
f1f52e75 DW |
408 | enum sci_status status = SCI_SUCCESS; |
409 | struct isci_request *ireq = sci_req_to_ireq(sci_req); | |
410 | struct sas_task *task = isci_request_access_task(ireq); | |
6f231dda | 411 | |
f1f52e75 DW |
412 | /* check for management protocols */ |
413 | if (ireq->ttype == tmf_task) { | |
414 | struct isci_tmf *tmf = isci_request_access_tmf(ireq); | |
6f231dda | 415 | |
f1f52e75 DW |
416 | if (tmf->tmf_code == isci_tmf_sata_srst_high || |
417 | tmf->tmf_code == isci_tmf_sata_srst_low) | |
418 | return scic_sds_stp_soft_reset_request_construct(sci_req); | |
419 | else { | |
420 | dev_err(scic_to_dev(sci_req->owning_controller), | |
421 | "%s: Request 0x%p received un-handled SAT " | |
422 | "management protocol 0x%x.\n", | |
423 | __func__, sci_req, tmf->tmf_code); | |
424 | ||
425 | return SCI_FAILURE; | |
426 | } | |
6f231dda | 427 | } |
6f231dda | 428 | |
f1f52e75 DW |
429 | if (!sas_protocol_ata(task->task_proto)) { |
430 | dev_err(scic_to_dev(sci_req->owning_controller), | |
431 | "%s: Non-ATA protocol in SATA path: 0x%x\n", | |
432 | __func__, | |
433 | task->task_proto); | |
434 | return SCI_FAILURE; | |
435 | ||
436 | } | |
437 | ||
438 | /* non data */ | |
439 | if (task->data_dir == DMA_NONE) | |
440 | return scic_sds_stp_non_data_request_construct(sci_req); | |
441 | ||
442 | /* NCQ */ | |
443 | if (task->ata_task.use_ncq) | |
444 | return scic_sds_stp_ncq_request_construct(sci_req, len, dir); | |
445 | ||
446 | /* DMA */ | |
447 | if (task->ata_task.dma_xfer) | |
448 | return scic_sds_stp_udma_request_construct(sci_req, len, dir); | |
449 | else /* PIO */ | |
450 | return scic_sds_stp_pio_request_construct(sci_req, copy); | |
451 | ||
452 | return status; | |
453 | } | |
454 | ||
455 | static enum sci_status scic_io_request_construct_basic_ssp(struct scic_sds_request *sci_req) | |
6f231dda | 456 | { |
f1f52e75 DW |
457 | struct isci_request *ireq = sci_req_to_ireq(sci_req); |
458 | struct sas_task *task = isci_request_access_task(ireq); | |
6f231dda | 459 | |
f1f52e75 | 460 | sci_req->protocol = SCIC_SSP_PROTOCOL; |
6f231dda | 461 | |
f1f52e75 DW |
462 | scu_ssp_io_request_construct_task_context(sci_req, |
463 | task->data_dir, | |
464 | task->total_xfer_len); | |
6f231dda | 465 | |
f1f52e75 | 466 | scic_sds_io_request_build_ssp_command_iu(sci_req); |
6f231dda | 467 | |
f1f52e75 DW |
468 | sci_base_state_machine_change_state( |
469 | &sci_req->state_machine, | |
470 | SCI_BASE_REQUEST_STATE_CONSTRUCTED); | |
ce4f75de | 471 | |
f1f52e75 DW |
472 | return SCI_SUCCESS; |
473 | } | |
6f231dda | 474 | |
f1f52e75 DW |
475 | enum sci_status scic_task_request_construct_ssp( |
476 | struct scic_sds_request *sci_req) | |
477 | { | |
478 | /* Construct the SSP Task SCU Task Context */ | |
479 | scu_ssp_task_request_construct_task_context(sci_req); | |
6f231dda | 480 | |
f1f52e75 DW |
481 | /* Fill in the SSP Task IU */ |
482 | scic_sds_task_request_build_ssp_task_iu(sci_req); | |
c4b9e24c | 483 | |
f1f52e75 DW |
484 | sci_base_state_machine_change_state(&sci_req->state_machine, |
485 | SCI_BASE_REQUEST_STATE_CONSTRUCTED); | |
67ea838d | 486 | |
f1f52e75 DW |
487 | return SCI_SUCCESS; |
488 | } | |
67ea838d | 489 | |
67ea838d | 490 | |
f1f52e75 DW |
491 | static enum sci_status scic_io_request_construct_basic_sata(struct scic_sds_request *sci_req) |
492 | { | |
493 | enum sci_status status; | |
494 | struct scic_sds_stp_request *stp_req; | |
495 | bool copy = false; | |
496 | struct isci_request *isci_request = sci_req_to_ireq(sci_req); | |
497 | struct sas_task *task = isci_request_access_task(isci_request); | |
6f231dda | 498 | |
f1f52e75 DW |
499 | stp_req = &sci_req->stp.req; |
500 | sci_req->protocol = SCIC_STP_PROTOCOL; | |
6f231dda | 501 | |
f1f52e75 DW |
502 | copy = (task->data_dir == DMA_NONE) ? false : true; |
503 | ||
504 | status = scic_io_request_construct_sata(sci_req, | |
505 | task->total_xfer_len, | |
506 | task->data_dir, | |
507 | copy); | |
508 | ||
509 | if (status == SCI_SUCCESS) | |
510 | sci_base_state_machine_change_state(&sci_req->state_machine, | |
511 | SCI_BASE_REQUEST_STATE_CONSTRUCTED); | |
512 | ||
513 | return status; | |
6f231dda DW |
514 | } |
515 | ||
516 | ||
f1f52e75 DW |
517 | enum sci_status scic_task_request_construct_sata(struct scic_sds_request *sci_req) |
518 | { | |
519 | enum sci_status status = SCI_SUCCESS; | |
520 | struct isci_request *ireq = sci_req_to_ireq(sci_req); | |
521 | ||
522 | /* check for management protocols */ | |
523 | if (ireq->ttype == tmf_task) { | |
524 | struct isci_tmf *tmf = isci_request_access_tmf(ireq); | |
525 | ||
526 | if (tmf->tmf_code == isci_tmf_sata_srst_high || | |
527 | tmf->tmf_code == isci_tmf_sata_srst_low) { | |
528 | status = scic_sds_stp_soft_reset_request_construct(sci_req); | |
529 | } else { | |
530 | dev_err(scic_to_dev(sci_req->owning_controller), | |
531 | "%s: Request 0x%p received un-handled SAT " | |
532 | "Protocol 0x%x.\n", | |
533 | __func__, sci_req, tmf->tmf_code); | |
534 | ||
535 | return SCI_FAILURE; | |
536 | } | |
537 | } | |
538 | ||
539 | if (status == SCI_SUCCESS) | |
540 | sci_base_state_machine_change_state( | |
541 | &sci_req->state_machine, | |
542 | SCI_BASE_REQUEST_STATE_CONSTRUCTED); | |
543 | ||
544 | return status; | |
545 | } | |
546 | ||
6f231dda | 547 | /** |
f1f52e75 DW |
548 | * sci_req_tx_bytes - bytes transferred when reply underruns request |
549 | * @sci_req: request that was terminated early | |
6f231dda | 550 | */ |
f1f52e75 DW |
551 | #define SCU_TASK_CONTEXT_SRAM 0x200000 |
552 | static u32 sci_req_tx_bytes(struct scic_sds_request *sci_req) | |
6f231dda | 553 | { |
f1f52e75 DW |
554 | struct scic_sds_controller *scic = sci_req->owning_controller; |
555 | u32 ret_val = 0; | |
556 | ||
557 | if (readl(&scic->smu_registers->address_modifier) == 0) { | |
558 | void __iomem *scu_reg_base = scic->scu_registers; | |
559 | ||
560 | /* get the bytes of data from the Address == BAR1 + 20002Ch + (256*TCi) where | |
561 | * BAR1 is the scu_registers | |
562 | * 0x20002C = 0x200000 + 0x2c | |
563 | * = start of task context SRAM + offset of (type.ssp.data_offset) | |
564 | * TCi is the io_tag of struct scic_sds_request | |
565 | */ | |
566 | ret_val = readl(scu_reg_base + | |
567 | (SCU_TASK_CONTEXT_SRAM + offsetof(struct scu_task_context, type.ssp.data_offset)) + | |
568 | ((sizeof(struct scu_task_context)) * scic_sds_io_tag_get_index(sci_req->io_tag))); | |
569 | } | |
570 | ||
571 | return ret_val; | |
572 | } | |
573 | ||
574 | enum sci_status | |
575 | scic_sds_request_start(struct scic_sds_request *request) | |
576 | { | |
577 | if (request->device_sequence != | |
578 | scic_sds_remote_device_get_sequence(request->target_device)) | |
579 | return SCI_FAILURE; | |
580 | ||
581 | if (request->state_handlers->start_handler) | |
582 | return request->state_handlers->start_handler(request); | |
583 | ||
584 | dev_warn(scic_to_dev(request->owning_controller), | |
585 | "%s: SCIC IO Request requested to start while in wrong " | |
586 | "state %d\n", | |
587 | __func__, | |
588 | sci_base_state_machine_get_state(&request->state_machine)); | |
589 | ||
590 | return SCI_FAILURE_INVALID_STATE; | |
591 | } | |
592 | ||
593 | enum sci_status | |
594 | scic_sds_io_request_terminate(struct scic_sds_request *request) | |
595 | { | |
596 | if (request->state_handlers->abort_handler) | |
597 | return request->state_handlers->abort_handler(request); | |
598 | ||
599 | dev_warn(scic_to_dev(request->owning_controller), | |
600 | "%s: SCIC IO Request requested to abort while in wrong " | |
601 | "state %d\n", | |
6f231dda | 602 | __func__, |
f1f52e75 | 603 | sci_base_state_machine_get_state(&request->state_machine)); |
6f231dda | 604 | |
f1f52e75 DW |
605 | return SCI_FAILURE_INVALID_STATE; |
606 | } | |
6f231dda | 607 | |
f1f52e75 DW |
608 | enum sci_status scic_sds_io_request_event_handler( |
609 | struct scic_sds_request *request, | |
610 | u32 event_code) | |
611 | { | |
612 | if (request->state_handlers->event_handler) | |
613 | return request->state_handlers->event_handler(request, event_code); | |
614 | ||
615 | dev_warn(scic_to_dev(request->owning_controller), | |
616 | "%s: SCIC IO Request given event code notification %x while " | |
617 | "in wrong state %d\n", | |
618 | __func__, | |
619 | event_code, | |
620 | sci_base_state_machine_get_state(&request->state_machine)); | |
621 | ||
622 | return SCI_FAILURE_INVALID_STATE; | |
6f231dda DW |
623 | } |
624 | ||
625 | /** | |
6f231dda | 626 | * |
f1f52e75 DW |
627 | * @sci_req: The SCIC_SDS_IO_REQUEST_T object for which the start |
628 | * operation is to be executed. | |
629 | * @frame_index: The frame index returned by the hardware for the reqeust | |
630 | * object. | |
631 | * | |
632 | * This method invokes the core state frame handler for the | |
633 | * SCIC_SDS_IO_REQUEST_T object. enum sci_status | |
6f231dda | 634 | */ |
f1f52e75 DW |
635 | enum sci_status scic_sds_io_request_frame_handler( |
636 | struct scic_sds_request *request, | |
637 | u32 frame_index) | |
6f231dda | 638 | { |
f1f52e75 DW |
639 | if (request->state_handlers->frame_handler) |
640 | return request->state_handlers->frame_handler(request, frame_index); | |
641 | ||
642 | dev_warn(scic_to_dev(request->owning_controller), | |
643 | "%s: SCIC IO Request given unexpected frame %x while in " | |
644 | "state %d\n", | |
645 | __func__, | |
646 | frame_index, | |
647 | sci_base_state_machine_get_state(&request->state_machine)); | |
648 | ||
649 | scic_sds_controller_release_frame(request->owning_controller, frame_index); | |
650 | return SCI_FAILURE_INVALID_STATE; | |
6f231dda DW |
651 | } |
652 | ||
f1f52e75 DW |
653 | /* |
654 | * This function copies response data for requests returning response data | |
655 | * instead of sense data. | |
656 | * @sci_req: This parameter specifies the request object for which to copy | |
657 | * the response data. | |
6f231dda | 658 | */ |
f1f52e75 | 659 | void scic_sds_io_request_copy_response(struct scic_sds_request *sci_req) |
6f231dda | 660 | { |
f1f52e75 DW |
661 | void *resp_buf; |
662 | u32 len; | |
663 | struct ssp_response_iu *ssp_response; | |
664 | struct isci_request *ireq = sci_req_to_ireq(sci_req); | |
665 | struct isci_tmf *isci_tmf = isci_request_access_tmf(ireq); | |
6f231dda | 666 | |
f1f52e75 | 667 | ssp_response = &sci_req->ssp.rsp; |
6f231dda | 668 | |
f1f52e75 | 669 | resp_buf = &isci_tmf->resp.resp_iu; |
6f231dda | 670 | |
f1f52e75 DW |
671 | len = min_t(u32, |
672 | SSP_RESP_IU_MAX_SIZE, | |
673 | be32_to_cpu(ssp_response->response_data_len)); | |
6f231dda | 674 | |
f1f52e75 DW |
675 | memcpy(resp_buf, ssp_response->resp_data, len); |
676 | } | |
6f231dda | 677 | |
f1f52e75 DW |
678 | /* |
679 | * This method implements the action taken when a constructed | |
680 | * SCIC_SDS_IO_REQUEST_T object receives a scic_sds_request_start() request. | |
681 | * This method will, if necessary, allocate a TCi for the io request object and | |
682 | * then will, if necessary, copy the constructed TC data into the actual TC | |
683 | * buffer. If everything is successful the post context field is updated with | |
684 | * the TCi so the controller can post the request to the hardware. enum sci_status | |
685 | * SCI_SUCCESS SCI_FAILURE_INSUFFICIENT_RESOURCES | |
686 | */ | |
687 | static enum sci_status scic_sds_request_constructed_state_start_handler( | |
688 | struct scic_sds_request *request) | |
689 | { | |
690 | struct scu_task_context *task_context; | |
6f231dda | 691 | |
f1f52e75 DW |
692 | if (request->io_tag == SCI_CONTROLLER_INVALID_IO_TAG) { |
693 | request->io_tag = | |
694 | scic_controller_allocate_io_tag(request->owning_controller); | |
695 | } | |
6f231dda | 696 | |
f1f52e75 DW |
697 | /* Record the IO Tag in the request */ |
698 | if (request->io_tag != SCI_CONTROLLER_INVALID_IO_TAG) { | |
699 | task_context = request->task_context_buffer; | |
6f231dda | 700 | |
f1f52e75 | 701 | task_context->task_index = scic_sds_io_tag_get_index(request->io_tag); |
6f231dda | 702 | |
f1f52e75 DW |
703 | switch (task_context->protocol_type) { |
704 | case SCU_TASK_CONTEXT_PROTOCOL_SMP: | |
705 | case SCU_TASK_CONTEXT_PROTOCOL_SSP: | |
706 | /* SSP/SMP Frame */ | |
707 | task_context->type.ssp.tag = request->io_tag; | |
708 | task_context->type.ssp.target_port_transfer_tag = 0xFFFF; | |
709 | break; | |
6f231dda | 710 | |
f1f52e75 DW |
711 | case SCU_TASK_CONTEXT_PROTOCOL_STP: |
712 | /* | |
713 | * STP/SATA Frame | |
714 | * task_context->type.stp.ncq_tag = request->ncq_tag; */ | |
715 | break; | |
6f231dda | 716 | |
f1f52e75 DW |
717 | case SCU_TASK_CONTEXT_PROTOCOL_NONE: |
718 | /* / @todo When do we set no protocol type? */ | |
719 | break; | |
6f231dda | 720 | |
f1f52e75 DW |
721 | default: |
722 | /* This should never happen since we build the IO requests */ | |
723 | break; | |
724 | } | |
6f231dda | 725 | |
f1f52e75 DW |
726 | /* |
727 | * Check to see if we need to copy the task context buffer | |
728 | * or have been building into the task context buffer */ | |
729 | if (request->was_tag_assigned_by_user == false) { | |
730 | scic_sds_controller_copy_task_context( | |
731 | request->owning_controller, request); | |
732 | } | |
6f231dda | 733 | |
f1f52e75 DW |
734 | /* Add to the post_context the io tag value */ |
735 | request->post_context |= scic_sds_io_tag_get_index(request->io_tag); | |
6f231dda | 736 | |
f1f52e75 DW |
737 | /* Everything is good go ahead and change state */ |
738 | sci_base_state_machine_change_state(&request->state_machine, | |
739 | SCI_BASE_REQUEST_STATE_STARTED); | |
6f231dda | 740 | |
f1f52e75 DW |
741 | return SCI_SUCCESS; |
742 | } | |
6f231dda | 743 | |
f1f52e75 DW |
744 | return SCI_FAILURE_INSUFFICIENT_RESOURCES; |
745 | } | |
6f231dda | 746 | |
f1f52e75 DW |
747 | /* |
748 | * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T | |
749 | * object receives a scic_sds_request_terminate() request. Since the request | |
750 | * has not yet been posted to the hardware the request transitions to the | |
751 | * completed state. enum sci_status SCI_SUCCESS | |
752 | */ | |
753 | static enum sci_status scic_sds_request_constructed_state_abort_handler( | |
754 | struct scic_sds_request *request) | |
755 | { | |
756 | /* | |
757 | * This request has been terminated by the user make sure that the correct | |
758 | * status code is returned */ | |
759 | scic_sds_request_set_status(request, | |
760 | SCU_TASK_DONE_TASK_ABORT, | |
761 | SCI_FAILURE_IO_TERMINATED); | |
762 | ||
763 | sci_base_state_machine_change_state(&request->state_machine, | |
764 | SCI_BASE_REQUEST_STATE_COMPLETED); | |
765 | return SCI_SUCCESS; | |
766 | } | |
6f231dda | 767 | |
f1f52e75 DW |
768 | /* |
769 | * ***************************************************************************** | |
770 | * * STARTED STATE HANDLERS | |
771 | * ***************************************************************************** */ | |
6f231dda | 772 | |
f1f52e75 DW |
773 | /* |
774 | * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T | |
775 | * object receives a scic_sds_request_terminate() request. Since the request | |
776 | * has been posted to the hardware the io request state is changed to the | |
777 | * aborting state. enum sci_status SCI_SUCCESS | |
778 | */ | |
779 | enum sci_status scic_sds_request_started_state_abort_handler( | |
780 | struct scic_sds_request *request) | |
781 | { | |
782 | if (request->has_started_substate_machine) | |
783 | sci_base_state_machine_stop(&request->started_substate_machine); | |
6f231dda | 784 | |
f1f52e75 DW |
785 | sci_base_state_machine_change_state(&request->state_machine, |
786 | SCI_BASE_REQUEST_STATE_ABORTING); | |
787 | return SCI_SUCCESS; | |
788 | } | |
6f231dda | 789 | |
f1f52e75 DW |
790 | /* |
791 | * scic_sds_request_started_state_tc_completion_handler() - This method process | |
792 | * TC (task context) completions for normal IO request (i.e. Task/Abort | |
793 | * Completions of type 0). This method will update the | |
794 | * SCIC_SDS_IO_REQUEST_T::status field. | |
795 | * @sci_req: This parameter specifies the request for which a completion | |
796 | * occurred. | |
797 | * @completion_code: This parameter specifies the completion code received from | |
798 | * the SCU. | |
799 | * | |
800 | */ | |
801 | static enum sci_status | |
802 | scic_sds_request_started_state_tc_completion_handler(struct scic_sds_request *sci_req, | |
803 | u32 completion_code) | |
804 | { | |
805 | u8 datapres; | |
806 | struct ssp_response_iu *resp_iu; | |
6f231dda | 807 | |
f1f52e75 DW |
808 | /* |
809 | * TODO: Any SDMA return code of other than 0 is bad | |
810 | * decode 0x003C0000 to determine SDMA status | |
811 | */ | |
812 | switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { | |
813 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): | |
814 | scic_sds_request_set_status(sci_req, | |
815 | SCU_TASK_DONE_GOOD, | |
816 | SCI_SUCCESS); | |
6f231dda DW |
817 | break; |
818 | ||
f1f52e75 DW |
819 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_EARLY_RESP): |
820 | { | |
821 | /* | |
822 | * There are times when the SCU hardware will return an early | |
823 | * response because the io request specified more data than is | |
824 | * returned by the target device (mode pages, inquiry data, | |
825 | * etc.). We must check the response stats to see if this is | |
826 | * truly a failed request or a good request that just got | |
827 | * completed early. | |
828 | */ | |
829 | struct ssp_response_iu *resp = &sci_req->ssp.rsp; | |
830 | ssize_t word_cnt = SSP_RESP_IU_MAX_SIZE / sizeof(u32); | |
831 | ||
832 | sci_swab32_cpy(&sci_req->ssp.rsp, | |
833 | &sci_req->ssp.rsp, | |
834 | word_cnt); | |
835 | ||
836 | if (resp->status == 0) { | |
837 | scic_sds_request_set_status( | |
838 | sci_req, | |
839 | SCU_TASK_DONE_GOOD, | |
840 | SCI_SUCCESS_IO_DONE_EARLY); | |
841 | } else { | |
842 | scic_sds_request_set_status( | |
843 | sci_req, | |
844 | SCU_TASK_DONE_CHECK_RESPONSE, | |
845 | SCI_FAILURE_IO_RESPONSE_VALID); | |
846 | } | |
847 | } | |
848 | break; | |
6f231dda | 849 | |
f1f52e75 DW |
850 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_CHECK_RESPONSE): |
851 | { | |
852 | ssize_t word_cnt = SSP_RESP_IU_MAX_SIZE / sizeof(u32); | |
6f231dda | 853 | |
f1f52e75 DW |
854 | sci_swab32_cpy(&sci_req->ssp.rsp, |
855 | &sci_req->ssp.rsp, | |
856 | word_cnt); | |
6f231dda | 857 | |
f1f52e75 DW |
858 | scic_sds_request_set_status(sci_req, |
859 | SCU_TASK_DONE_CHECK_RESPONSE, | |
860 | SCI_FAILURE_IO_RESPONSE_VALID); | |
6f231dda | 861 | break; |
f1f52e75 | 862 | } |
6f231dda | 863 | |
f1f52e75 DW |
864 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_RESP_LEN_ERR): |
865 | /* | |
866 | * / @todo With TASK_DONE_RESP_LEN_ERR is the response frame | |
867 | * guaranteed to be received before this completion status is | |
868 | * posted? | |
869 | */ | |
870 | resp_iu = &sci_req->ssp.rsp; | |
871 | datapres = resp_iu->datapres; | |
872 | ||
873 | if ((datapres == 0x01) || (datapres == 0x02)) { | |
874 | scic_sds_request_set_status( | |
875 | sci_req, | |
876 | SCU_TASK_DONE_CHECK_RESPONSE, | |
877 | SCI_FAILURE_IO_RESPONSE_VALID); | |
878 | } else | |
879 | scic_sds_request_set_status( | |
880 | sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS); | |
6f231dda DW |
881 | break; |
882 | ||
f1f52e75 DW |
883 | /* only stp device gets suspended. */ |
884 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_ACK_NAK_TO): | |
885 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LL_PERR): | |
886 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_NAK_ERR): | |
887 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_DATA_LEN_ERR): | |
888 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LL_ABORT_ERR): | |
889 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_XR_WD_LEN): | |
890 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_MAX_PLD_ERR): | |
891 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_RESP): | |
892 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_SDBFIS): | |
893 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_REG_ERR): | |
894 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SDB_ERR): | |
895 | if (sci_req->protocol == SCIC_STP_PROTOCOL) { | |
896 | scic_sds_request_set_status( | |
897 | sci_req, | |
898 | SCU_GET_COMPLETION_TL_STATUS(completion_code) >> | |
899 | SCU_COMPLETION_TL_STATUS_SHIFT, | |
900 | SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED); | |
901 | } else { | |
902 | scic_sds_request_set_status( | |
903 | sci_req, | |
904 | SCU_GET_COMPLETION_TL_STATUS(completion_code) >> | |
905 | SCU_COMPLETION_TL_STATUS_SHIFT, | |
906 | SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR); | |
907 | } | |
6f231dda DW |
908 | break; |
909 | ||
f1f52e75 DW |
910 | /* both stp/ssp device gets suspended */ |
911 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LF_ERR): | |
912 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_WRONG_DESTINATION): | |
913 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_1): | |
914 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_2): | |
915 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_3): | |
916 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_BAD_DESTINATION): | |
917 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_ZONE_VIOLATION): | |
918 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_STP_RESOURCES_BUSY): | |
919 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_PROTOCOL_NOT_SUPPORTED): | |
920 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_CONNECTION_RATE_NOT_SUPPORTED): | |
921 | scic_sds_request_set_status( | |
922 | sci_req, | |
923 | SCU_GET_COMPLETION_TL_STATUS(completion_code) >> | |
924 | SCU_COMPLETION_TL_STATUS_SHIFT, | |
925 | SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED); | |
6f231dda DW |
926 | break; |
927 | ||
f1f52e75 DW |
928 | /* neither ssp nor stp gets suspended. */ |
929 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_NAK_CMD_ERR): | |
930 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_XR): | |
931 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_XR_IU_LEN_ERR): | |
932 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SDMA_ERR): | |
933 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_OFFSET_ERR): | |
934 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_EXCESS_DATA): | |
935 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_RESP_TO_ERR): | |
936 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_UFI_ERR): | |
937 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_FRM_TYPE_ERR): | |
938 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_LL_RX_ERR): | |
939 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_DATA): | |
940 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_OPEN_FAIL): | |
941 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_VIIT_ENTRY_NV): | |
942 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_IIT_ENTRY_NV): | |
943 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_RNCNV_OUTBOUND): | |
6f231dda | 944 | default: |
f1f52e75 DW |
945 | scic_sds_request_set_status( |
946 | sci_req, | |
947 | SCU_GET_COMPLETION_TL_STATUS(completion_code) >> | |
948 | SCU_COMPLETION_TL_STATUS_SHIFT, | |
949 | SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR); | |
6f231dda DW |
950 | break; |
951 | } | |
f1f52e75 DW |
952 | |
953 | /* | |
954 | * TODO: This is probably wrong for ACK/NAK timeout conditions | |
955 | */ | |
956 | ||
957 | /* In all cases we will treat this as the completion of the IO req. */ | |
958 | sci_base_state_machine_change_state( | |
959 | &sci_req->state_machine, | |
960 | SCI_BASE_REQUEST_STATE_COMPLETED); | |
961 | return SCI_SUCCESS; | |
6f231dda DW |
962 | } |
963 | ||
f1f52e75 DW |
964 | enum sci_status |
965 | scic_sds_io_request_tc_completion(struct scic_sds_request *request, u32 completion_code) | |
6f231dda | 966 | { |
f1f52e75 DW |
967 | if (request->state_machine.current_state_id == SCI_BASE_REQUEST_STATE_STARTED && |
968 | request->has_started_substate_machine == false) | |
969 | return scic_sds_request_started_state_tc_completion_handler(request, completion_code); | |
970 | else if (request->state_handlers->tc_completion_handler) | |
971 | return request->state_handlers->tc_completion_handler(request, completion_code); | |
972 | ||
973 | dev_warn(scic_to_dev(request->owning_controller), | |
974 | "%s: SCIC IO Request given task completion notification %x " | |
975 | "while in wrong state %d\n", | |
976 | __func__, | |
977 | completion_code, | |
978 | sci_base_state_machine_get_state(&request->state_machine)); | |
6f231dda | 979 | |
f1f52e75 | 980 | return SCI_FAILURE_INVALID_STATE; |
6f231dda | 981 | |
f1f52e75 | 982 | } |
6f231dda | 983 | |
f1f52e75 DW |
984 | /* |
985 | * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T | |
986 | * object receives a scic_sds_request_frame_handler() request. This method | |
987 | * first determines the frame type received. If this is a response frame then | |
988 | * the response data is copied to the io request response buffer for processing | |
989 | * at completion time. If the frame type is not a response buffer an error is | |
990 | * logged. enum sci_status SCI_SUCCESS SCI_FAILURE_INVALID_PARAMETER_VALUE | |
991 | */ | |
992 | static enum sci_status | |
993 | scic_sds_request_started_state_frame_handler(struct scic_sds_request *sci_req, | |
994 | u32 frame_index) | |
995 | { | |
996 | enum sci_status status; | |
997 | u32 *frame_header; | |
998 | struct ssp_frame_hdr ssp_hdr; | |
999 | ssize_t word_cnt; | |
1000 | ||
1001 | status = scic_sds_unsolicited_frame_control_get_header( | |
1002 | &(scic_sds_request_get_controller(sci_req)->uf_control), | |
1003 | frame_index, | |
1004 | (void **)&frame_header); | |
1005 | ||
1006 | word_cnt = sizeof(struct ssp_frame_hdr) / sizeof(u32); | |
1007 | sci_swab32_cpy(&ssp_hdr, frame_header, word_cnt); | |
1008 | ||
1009 | if (ssp_hdr.frame_type == SSP_RESPONSE) { | |
1010 | struct ssp_response_iu *resp_iu; | |
1011 | ssize_t word_cnt = SSP_RESP_IU_MAX_SIZE / sizeof(u32); | |
1012 | ||
1013 | status = scic_sds_unsolicited_frame_control_get_buffer( | |
1014 | &(scic_sds_request_get_controller(sci_req)->uf_control), | |
1015 | frame_index, | |
1016 | (void **)&resp_iu); | |
1017 | ||
1018 | sci_swab32_cpy(&sci_req->ssp.rsp, | |
1019 | resp_iu, word_cnt); | |
1020 | ||
1021 | resp_iu = &sci_req->ssp.rsp; | |
1022 | ||
1023 | if ((resp_iu->datapres == 0x01) || | |
1024 | (resp_iu->datapres == 0x02)) { | |
1025 | scic_sds_request_set_status( | |
1026 | sci_req, | |
1027 | SCU_TASK_DONE_CHECK_RESPONSE, | |
1028 | SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR); | |
1029 | } else | |
1030 | scic_sds_request_set_status( | |
1031 | sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS); | |
1032 | } else { | |
1033 | /* This was not a response frame why did it get forwarded? */ | |
1034 | dev_err(scic_to_dev(sci_req->owning_controller), | |
1035 | "%s: SCIC IO Request 0x%p received unexpected " | |
1036 | "frame %d type 0x%02x\n", | |
6f231dda | 1037 | __func__, |
f1f52e75 DW |
1038 | sci_req, |
1039 | frame_index, | |
1040 | ssp_hdr.frame_type); | |
1041 | } | |
ec6c9638 | 1042 | |
f1f52e75 DW |
1043 | /* |
1044 | * In any case we are done with this frame buffer return it to the | |
1045 | * controller | |
1046 | */ | |
1047 | scic_sds_controller_release_frame( | |
1048 | sci_req->owning_controller, frame_index); | |
6f231dda | 1049 | |
f1f52e75 DW |
1050 | return SCI_SUCCESS; |
1051 | } | |
a5fde225 | 1052 | |
f1f52e75 DW |
1053 | /* |
1054 | * ***************************************************************************** | |
1055 | * * COMPLETED STATE HANDLERS | |
1056 | * ***************************************************************************** */ | |
a5fde225 | 1057 | |
a5fde225 | 1058 | |
f1f52e75 DW |
1059 | /* |
1060 | * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T | |
1061 | * object receives a scic_sds_request_complete() request. This method frees up | |
1062 | * any io request resources that have been allocated and transitions the | |
1063 | * request to its final state. Consider stopping the state machine instead of | |
1064 | * transitioning to the final state? enum sci_status SCI_SUCCESS | |
1065 | */ | |
1066 | static enum sci_status scic_sds_request_completed_state_complete_handler( | |
1067 | struct scic_sds_request *request) | |
1068 | { | |
1069 | if (request->was_tag_assigned_by_user != true) { | |
1070 | scic_controller_free_io_tag( | |
1071 | request->owning_controller, request->io_tag); | |
1072 | } | |
6f231dda | 1073 | |
f1f52e75 DW |
1074 | if (request->saved_rx_frame_index != SCU_INVALID_FRAME_INDEX) { |
1075 | scic_sds_controller_release_frame( | |
1076 | request->owning_controller, request->saved_rx_frame_index); | |
1077 | } | |
6f231dda | 1078 | |
f1f52e75 DW |
1079 | sci_base_state_machine_change_state(&request->state_machine, |
1080 | SCI_BASE_REQUEST_STATE_FINAL); | |
1081 | return SCI_SUCCESS; | |
1082 | } | |
6f231dda | 1083 | |
f1f52e75 DW |
1084 | /* |
1085 | * ***************************************************************************** | |
1086 | * * ABORTING STATE HANDLERS | |
1087 | * ***************************************************************************** */ | |
1088 | ||
1089 | /* | |
1090 | * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T | |
1091 | * object receives a scic_sds_request_terminate() request. This method is the | |
1092 | * io request aborting state abort handlers. On receipt of a multiple | |
1093 | * terminate requests the io request will transition to the completed state. | |
1094 | * This should not happen in normal operation. enum sci_status SCI_SUCCESS | |
1095 | */ | |
1096 | static enum sci_status scic_sds_request_aborting_state_abort_handler( | |
1097 | struct scic_sds_request *request) | |
1098 | { | |
1099 | sci_base_state_machine_change_state(&request->state_machine, | |
1100 | SCI_BASE_REQUEST_STATE_COMPLETED); | |
1101 | return SCI_SUCCESS; | |
1102 | } | |
1103 | ||
1104 | /* | |
1105 | * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T | |
1106 | * object receives a scic_sds_request_task_completion() request. This method | |
1107 | * decodes the completion type waiting for the abort task complete | |
1108 | * notification. When the abort task complete is received the io request | |
1109 | * transitions to the completed state. enum sci_status SCI_SUCCESS | |
1110 | */ | |
1111 | static enum sci_status scic_sds_request_aborting_state_tc_completion_handler( | |
1112 | struct scic_sds_request *sci_req, | |
1113 | u32 completion_code) | |
1114 | { | |
1115 | switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { | |
1116 | case (SCU_TASK_DONE_GOOD << SCU_COMPLETION_TL_STATUS_SHIFT): | |
1117 | case (SCU_TASK_DONE_TASK_ABORT << SCU_COMPLETION_TL_STATUS_SHIFT): | |
1118 | scic_sds_request_set_status( | |
1119 | sci_req, SCU_TASK_DONE_TASK_ABORT, SCI_FAILURE_IO_TERMINATED | |
1120 | ); | |
1121 | ||
1122 | sci_base_state_machine_change_state(&sci_req->state_machine, | |
1123 | SCI_BASE_REQUEST_STATE_COMPLETED); | |
1124 | break; | |
1125 | ||
1126 | default: | |
1127 | /* | |
1128 | * Unless we get some strange error wait for the task abort to complete | |
1129 | * TODO: Should there be a state change for this completion? */ | |
6f231dda DW |
1130 | break; |
1131 | } | |
f1f52e75 DW |
1132 | |
1133 | return SCI_SUCCESS; | |
1134 | } | |
1135 | ||
1136 | /* | |
1137 | * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T | |
1138 | * object receives a scic_sds_request_frame_handler() request. This method | |
1139 | * discards the unsolicited frame since we are waiting for the abort task | |
1140 | * completion. enum sci_status SCI_SUCCESS | |
1141 | */ | |
1142 | static enum sci_status scic_sds_request_aborting_state_frame_handler( | |
1143 | struct scic_sds_request *sci_req, | |
1144 | u32 frame_index) | |
1145 | { | |
1146 | /* TODO: Is it even possible to get an unsolicited frame in the aborting state? */ | |
1147 | ||
1148 | scic_sds_controller_release_frame( | |
1149 | sci_req->owning_controller, frame_index); | |
1150 | ||
1151 | return SCI_SUCCESS; | |
6f231dda DW |
1152 | } |
1153 | ||
f1f52e75 DW |
1154 | static const struct scic_sds_io_request_state_handler scic_sds_request_state_handler_table[] = { |
1155 | [SCI_BASE_REQUEST_STATE_INITIAL] = { | |
1156 | }, | |
1157 | [SCI_BASE_REQUEST_STATE_CONSTRUCTED] = { | |
1158 | .start_handler = scic_sds_request_constructed_state_start_handler, | |
1159 | .abort_handler = scic_sds_request_constructed_state_abort_handler, | |
1160 | }, | |
1161 | [SCI_BASE_REQUEST_STATE_STARTED] = { | |
1162 | .abort_handler = scic_sds_request_started_state_abort_handler, | |
1163 | .tc_completion_handler = scic_sds_request_started_state_tc_completion_handler, | |
1164 | .frame_handler = scic_sds_request_started_state_frame_handler, | |
1165 | }, | |
1166 | [SCI_BASE_REQUEST_STATE_COMPLETED] = { | |
1167 | .complete_handler = scic_sds_request_completed_state_complete_handler, | |
1168 | }, | |
1169 | [SCI_BASE_REQUEST_STATE_ABORTING] = { | |
1170 | .abort_handler = scic_sds_request_aborting_state_abort_handler, | |
1171 | .tc_completion_handler = scic_sds_request_aborting_state_tc_completion_handler, | |
1172 | .frame_handler = scic_sds_request_aborting_state_frame_handler, | |
1173 | }, | |
1174 | [SCI_BASE_REQUEST_STATE_FINAL] = { | |
1175 | }, | |
1176 | }; | |
1177 | ||
1178 | ||
6f231dda | 1179 | /** |
f1f52e75 DW |
1180 | * isci_request_process_response_iu() - This function sets the status and |
1181 | * response iu, in the task struct, from the request object for the upper | |
1182 | * layer driver. | |
1183 | * @sas_task: This parameter is the task struct from the upper layer driver. | |
1184 | * @resp_iu: This parameter points to the response iu of the completed request. | |
1185 | * @dev: This parameter specifies the linux device struct. | |
6f231dda DW |
1186 | * |
1187 | * none. | |
1188 | */ | |
f1f52e75 DW |
1189 | static void isci_request_process_response_iu( |
1190 | struct sas_task *task, | |
1191 | struct ssp_response_iu *resp_iu, | |
1192 | struct device *dev) | |
6f231dda | 1193 | { |
f1f52e75 DW |
1194 | dev_dbg(dev, |
1195 | "%s: resp_iu = %p " | |
1196 | "resp_iu->status = 0x%x,\nresp_iu->datapres = %d " | |
1197 | "resp_iu->response_data_len = %x, " | |
1198 | "resp_iu->sense_data_len = %x\nrepsonse data: ", | |
6f231dda | 1199 | __func__, |
f1f52e75 DW |
1200 | resp_iu, |
1201 | resp_iu->status, | |
1202 | resp_iu->datapres, | |
1203 | resp_iu->response_data_len, | |
1204 | resp_iu->sense_data_len); | |
6f231dda | 1205 | |
f1f52e75 | 1206 | task->task_status.stat = resp_iu->status; |
6f231dda | 1207 | |
f1f52e75 DW |
1208 | /* libsas updates the task status fields based on the response iu. */ |
1209 | sas_ssp_task_response(dev, task, resp_iu); | |
1210 | } | |
6f231dda | 1211 | |
f1f52e75 DW |
1212 | /** |
1213 | * isci_request_set_open_reject_status() - This function prepares the I/O | |
1214 | * completion for OPEN_REJECT conditions. | |
1215 | * @request: This parameter is the completed isci_request object. | |
1216 | * @response_ptr: This parameter specifies the service response for the I/O. | |
1217 | * @status_ptr: This parameter specifies the exec status for the I/O. | |
1218 | * @complete_to_host_ptr: This parameter specifies the action to be taken by | |
1219 | * the LLDD with respect to completing this request or forcing an abort | |
1220 | * condition on the I/O. | |
1221 | * @open_rej_reason: This parameter specifies the encoded reason for the | |
1222 | * abandon-class reject. | |
1223 | * | |
1224 | * none. | |
1225 | */ | |
1226 | static void isci_request_set_open_reject_status( | |
1227 | struct isci_request *request, | |
1228 | struct sas_task *task, | |
1229 | enum service_response *response_ptr, | |
1230 | enum exec_status *status_ptr, | |
1231 | enum isci_completion_selection *complete_to_host_ptr, | |
1232 | enum sas_open_rej_reason open_rej_reason) | |
1233 | { | |
1234 | /* Task in the target is done. */ | |
1235 | request->complete_in_target = true; | |
1236 | *response_ptr = SAS_TASK_UNDELIVERED; | |
1237 | *status_ptr = SAS_OPEN_REJECT; | |
1238 | *complete_to_host_ptr = isci_perform_normal_io_completion; | |
1239 | task->task_status.open_rej_reason = open_rej_reason; | |
1240 | } | |
6f231dda | 1241 | |
f1f52e75 DW |
1242 | /** |
1243 | * isci_request_handle_controller_specific_errors() - This function decodes | |
1244 | * controller-specific I/O completion error conditions. | |
1245 | * @request: This parameter is the completed isci_request object. | |
1246 | * @response_ptr: This parameter specifies the service response for the I/O. | |
1247 | * @status_ptr: This parameter specifies the exec status for the I/O. | |
1248 | * @complete_to_host_ptr: This parameter specifies the action to be taken by | |
1249 | * the LLDD with respect to completing this request or forcing an abort | |
1250 | * condition on the I/O. | |
1251 | * | |
1252 | * none. | |
1253 | */ | |
1254 | static void isci_request_handle_controller_specific_errors( | |
1255 | struct isci_remote_device *isci_device, | |
1256 | struct isci_request *request, | |
1257 | struct sas_task *task, | |
1258 | enum service_response *response_ptr, | |
1259 | enum exec_status *status_ptr, | |
1260 | enum isci_completion_selection *complete_to_host_ptr) | |
1261 | { | |
1262 | unsigned int cstatus; | |
6f231dda | 1263 | |
f1f52e75 | 1264 | cstatus = request->sci.scu_status; |
a5fde225 | 1265 | |
f1f52e75 DW |
1266 | dev_dbg(&request->isci_host->pdev->dev, |
1267 | "%s: %p SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR " | |
1268 | "- controller status = 0x%x\n", | |
1269 | __func__, request, cstatus); | |
6f231dda | 1270 | |
f1f52e75 DW |
1271 | /* Decode the controller-specific errors; most |
1272 | * important is to recognize those conditions in which | |
1273 | * the target may still have a task outstanding that | |
1274 | * must be aborted. | |
1275 | * | |
1276 | * Note that there are SCU completion codes being | |
1277 | * named in the decode below for which SCIC has already | |
1278 | * done work to handle them in a way other than as | |
1279 | * a controller-specific completion code; these are left | |
1280 | * in the decode below for completeness sake. | |
1281 | */ | |
1282 | switch (cstatus) { | |
1283 | case SCU_TASK_DONE_DMASETUP_DIRERR: | |
1284 | /* Also SCU_TASK_DONE_SMP_FRM_TYPE_ERR: */ | |
1285 | case SCU_TASK_DONE_XFERCNT_ERR: | |
1286 | /* Also SCU_TASK_DONE_SMP_UFI_ERR: */ | |
1287 | if (task->task_proto == SAS_PROTOCOL_SMP) { | |
1288 | /* SCU_TASK_DONE_SMP_UFI_ERR == Task Done. */ | |
1289 | *response_ptr = SAS_TASK_COMPLETE; | |
6f231dda | 1290 | |
f1f52e75 DW |
1291 | /* See if the device has been/is being stopped. Note |
1292 | * that we ignore the quiesce state, since we are | |
6f231dda DW |
1293 | * concerned about the actual device state. |
1294 | */ | |
f1f52e75 DW |
1295 | if ((isci_device->status == isci_stopping) || |
1296 | (isci_device->status == isci_stopped)) | |
1297 | *status_ptr = SAS_DEVICE_UNKNOWN; | |
1298 | else | |
1299 | *status_ptr = SAS_ABORTED_TASK; | |
6f231dda | 1300 | |
f1f52e75 | 1301 | request->complete_in_target = true; |
6f231dda | 1302 | |
f1f52e75 DW |
1303 | *complete_to_host_ptr = |
1304 | isci_perform_normal_io_completion; | |
1305 | } else { | |
1306 | /* Task in the target is not done. */ | |
1307 | *response_ptr = SAS_TASK_UNDELIVERED; | |
a5fde225 | 1308 | |
f1f52e75 DW |
1309 | if ((isci_device->status == isci_stopping) || |
1310 | (isci_device->status == isci_stopped)) | |
1311 | *status_ptr = SAS_DEVICE_UNKNOWN; | |
1312 | else | |
1313 | *status_ptr = SAM_STAT_TASK_ABORTED; | |
6f231dda | 1314 | |
f1f52e75 | 1315 | request->complete_in_target = false; |
6f231dda | 1316 | |
f1f52e75 DW |
1317 | *complete_to_host_ptr = |
1318 | isci_perform_error_io_completion; | |
1319 | } | |
1320 | ||
1321 | break; | |
1322 | ||
1323 | case SCU_TASK_DONE_CRC_ERR: | |
1324 | case SCU_TASK_DONE_NAK_CMD_ERR: | |
1325 | case SCU_TASK_DONE_EXCESS_DATA: | |
1326 | case SCU_TASK_DONE_UNEXP_FIS: | |
1327 | /* Also SCU_TASK_DONE_UNEXP_RESP: */ | |
1328 | case SCU_TASK_DONE_VIIT_ENTRY_NV: /* TODO - conditions? */ | |
1329 | case SCU_TASK_DONE_IIT_ENTRY_NV: /* TODO - conditions? */ | |
1330 | case SCU_TASK_DONE_RNCNV_OUTBOUND: /* TODO - conditions? */ | |
1331 | /* These are conditions in which the target | |
1332 | * has completed the task, so that no cleanup | |
1333 | * is necessary. | |
6f231dda | 1334 | */ |
f1f52e75 | 1335 | *response_ptr = SAS_TASK_COMPLETE; |
6f231dda DW |
1336 | |
1337 | /* See if the device has been/is being stopped. Note | |
1338 | * that we ignore the quiesce state, since we are | |
1339 | * concerned about the actual device state. | |
1340 | */ | |
1341 | if ((isci_device->status == isci_stopping) || | |
1342 | (isci_device->status == isci_stopped)) | |
f1f52e75 | 1343 | *status_ptr = SAS_DEVICE_UNKNOWN; |
6f231dda | 1344 | else |
f1f52e75 | 1345 | *status_ptr = SAS_ABORTED_TASK; |
6f231dda | 1346 | |
f1f52e75 | 1347 | request->complete_in_target = true; |
a5fde225 | 1348 | |
f1f52e75 | 1349 | *complete_to_host_ptr = isci_perform_normal_io_completion; |
6f231dda DW |
1350 | break; |
1351 | ||
6f231dda | 1352 | |
f1f52e75 DW |
1353 | /* Note that the only open reject completion codes seen here will be |
1354 | * abandon-class codes; all others are automatically retried in the SCU. | |
1355 | */ | |
1356 | case SCU_TASK_OPEN_REJECT_WRONG_DESTINATION: | |
a5fde225 | 1357 | |
f1f52e75 DW |
1358 | isci_request_set_open_reject_status( |
1359 | request, task, response_ptr, status_ptr, | |
1360 | complete_to_host_ptr, SAS_OREJ_WRONG_DEST); | |
1361 | break; | |
a5fde225 | 1362 | |
f1f52e75 | 1363 | case SCU_TASK_OPEN_REJECT_ZONE_VIOLATION: |
6f231dda | 1364 | |
f1f52e75 DW |
1365 | /* Note - the return of AB0 will change when |
1366 | * libsas implements detection of zone violations. | |
1367 | */ | |
1368 | isci_request_set_open_reject_status( | |
1369 | request, task, response_ptr, status_ptr, | |
1370 | complete_to_host_ptr, SAS_OREJ_RESV_AB0); | |
1371 | break; | |
6f231dda | 1372 | |
f1f52e75 | 1373 | case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_1: |
6f231dda | 1374 | |
f1f52e75 DW |
1375 | isci_request_set_open_reject_status( |
1376 | request, task, response_ptr, status_ptr, | |
1377 | complete_to_host_ptr, SAS_OREJ_RESV_AB1); | |
1378 | break; | |
6f231dda | 1379 | |
f1f52e75 | 1380 | case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_2: |
6f231dda | 1381 | |
f1f52e75 DW |
1382 | isci_request_set_open_reject_status( |
1383 | request, task, response_ptr, status_ptr, | |
1384 | complete_to_host_ptr, SAS_OREJ_RESV_AB2); | |
1385 | break; | |
6f231dda | 1386 | |
f1f52e75 | 1387 | case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_3: |
6f231dda | 1388 | |
f1f52e75 DW |
1389 | isci_request_set_open_reject_status( |
1390 | request, task, response_ptr, status_ptr, | |
1391 | complete_to_host_ptr, SAS_OREJ_RESV_AB3); | |
1392 | break; | |
6f231dda | 1393 | |
f1f52e75 | 1394 | case SCU_TASK_OPEN_REJECT_BAD_DESTINATION: |
6f231dda | 1395 | |
f1f52e75 DW |
1396 | isci_request_set_open_reject_status( |
1397 | request, task, response_ptr, status_ptr, | |
1398 | complete_to_host_ptr, SAS_OREJ_BAD_DEST); | |
1399 | break; | |
6f231dda | 1400 | |
f1f52e75 | 1401 | case SCU_TASK_OPEN_REJECT_STP_RESOURCES_BUSY: |
6f231dda | 1402 | |
f1f52e75 DW |
1403 | isci_request_set_open_reject_status( |
1404 | request, task, response_ptr, status_ptr, | |
1405 | complete_to_host_ptr, SAS_OREJ_STP_NORES); | |
1406 | break; | |
6f231dda | 1407 | |
f1f52e75 | 1408 | case SCU_TASK_OPEN_REJECT_PROTOCOL_NOT_SUPPORTED: |
6f231dda | 1409 | |
f1f52e75 DW |
1410 | isci_request_set_open_reject_status( |
1411 | request, task, response_ptr, status_ptr, | |
1412 | complete_to_host_ptr, SAS_OREJ_EPROTO); | |
1413 | break; | |
6f231dda | 1414 | |
f1f52e75 | 1415 | case SCU_TASK_OPEN_REJECT_CONNECTION_RATE_NOT_SUPPORTED: |
6f231dda | 1416 | |
f1f52e75 DW |
1417 | isci_request_set_open_reject_status( |
1418 | request, task, response_ptr, status_ptr, | |
1419 | complete_to_host_ptr, SAS_OREJ_CONN_RATE); | |
1420 | break; | |
6f231dda | 1421 | |
f1f52e75 DW |
1422 | case SCU_TASK_DONE_LL_R_ERR: |
1423 | /* Also SCU_TASK_DONE_ACK_NAK_TO: */ | |
1424 | case SCU_TASK_DONE_LL_PERR: | |
1425 | case SCU_TASK_DONE_LL_SY_TERM: | |
1426 | /* Also SCU_TASK_DONE_NAK_ERR:*/ | |
1427 | case SCU_TASK_DONE_LL_LF_TERM: | |
1428 | /* Also SCU_TASK_DONE_DATA_LEN_ERR: */ | |
1429 | case SCU_TASK_DONE_LL_ABORT_ERR: | |
1430 | case SCU_TASK_DONE_SEQ_INV_TYPE: | |
1431 | /* Also SCU_TASK_DONE_UNEXP_XR: */ | |
1432 | case SCU_TASK_DONE_XR_IU_LEN_ERR: | |
1433 | case SCU_TASK_DONE_INV_FIS_LEN: | |
1434 | /* Also SCU_TASK_DONE_XR_WD_LEN: */ | |
1435 | case SCU_TASK_DONE_SDMA_ERR: | |
1436 | case SCU_TASK_DONE_OFFSET_ERR: | |
1437 | case SCU_TASK_DONE_MAX_PLD_ERR: | |
1438 | case SCU_TASK_DONE_LF_ERR: | |
1439 | case SCU_TASK_DONE_SMP_RESP_TO_ERR: /* Escalate to dev reset? */ | |
1440 | case SCU_TASK_DONE_SMP_LL_RX_ERR: | |
1441 | case SCU_TASK_DONE_UNEXP_DATA: | |
1442 | case SCU_TASK_DONE_UNEXP_SDBFIS: | |
1443 | case SCU_TASK_DONE_REG_ERR: | |
1444 | case SCU_TASK_DONE_SDB_ERR: | |
1445 | case SCU_TASK_DONE_TASK_ABORT: | |
1446 | default: | |
1447 | /* Task in the target is not done. */ | |
1448 | *response_ptr = SAS_TASK_UNDELIVERED; | |
1449 | *status_ptr = SAM_STAT_TASK_ABORTED; | |
1450 | request->complete_in_target = false; | |
6f231dda | 1451 | |
f1f52e75 DW |
1452 | *complete_to_host_ptr = isci_perform_error_io_completion; |
1453 | break; | |
1454 | } | |
1455 | } | |
6f231dda | 1456 | |
f1f52e75 DW |
1457 | /** |
1458 | * isci_task_save_for_upper_layer_completion() - This function saves the | |
1459 | * request for later completion to the upper layer driver. | |
1460 | * @host: This parameter is a pointer to the host on which the the request | |
1461 | * should be queued (either as an error or success). | |
1462 | * @request: This parameter is the completed request. | |
1463 | * @response: This parameter is the response code for the completed task. | |
1464 | * @status: This parameter is the status code for the completed task. | |
1465 | * | |
1466 | * none. | |
1467 | */ | |
1468 | static void isci_task_save_for_upper_layer_completion( | |
1469 | struct isci_host *host, | |
1470 | struct isci_request *request, | |
1471 | enum service_response response, | |
1472 | enum exec_status status, | |
1473 | enum isci_completion_selection task_notification_selection) | |
1474 | { | |
1475 | struct sas_task *task = isci_request_access_task(request); | |
6f231dda | 1476 | |
f1f52e75 DW |
1477 | task_notification_selection |
1478 | = isci_task_set_completion_status(task, response, status, | |
1479 | task_notification_selection); | |
6f231dda | 1480 | |
f1f52e75 DW |
1481 | /* Tasks aborted specifically by a call to the lldd_abort_task |
1482 | * function should not be completed to the host in the regular path. | |
1483 | */ | |
1484 | switch (task_notification_selection) { | |
6f231dda | 1485 | |
f1f52e75 | 1486 | case isci_perform_normal_io_completion: |
6f231dda | 1487 | |
f1f52e75 DW |
1488 | /* Normal notification (task_done) */ |
1489 | dev_dbg(&host->pdev->dev, | |
1490 | "%s: Normal - task = %p, response=%d (%d), status=%d (%d)\n", | |
1491 | __func__, | |
1492 | task, | |
1493 | task->task_status.resp, response, | |
1494 | task->task_status.stat, status); | |
1495 | /* Add to the completed list. */ | |
1496 | list_add(&request->completed_node, | |
1497 | &host->requests_to_complete); | |
6f231dda | 1498 | |
f1f52e75 DW |
1499 | /* Take the request off the device's pending request list. */ |
1500 | list_del_init(&request->dev_node); | |
1501 | break; | |
6f231dda | 1502 | |
f1f52e75 DW |
1503 | case isci_perform_aborted_io_completion: |
1504 | /* No notification to libsas because this request is | |
1505 | * already in the abort path. | |
1506 | */ | |
1507 | dev_warn(&host->pdev->dev, | |
1508 | "%s: Aborted - task = %p, response=%d (%d), status=%d (%d)\n", | |
1509 | __func__, | |
1510 | task, | |
1511 | task->task_status.resp, response, | |
1512 | task->task_status.stat, status); | |
6f231dda | 1513 | |
f1f52e75 DW |
1514 | /* Wake up whatever process was waiting for this |
1515 | * request to complete. | |
1516 | */ | |
1517 | WARN_ON(request->io_request_completion == NULL); | |
6f231dda | 1518 | |
f1f52e75 DW |
1519 | if (request->io_request_completion != NULL) { |
1520 | ||
1521 | /* Signal whoever is waiting that this | |
1522 | * request is complete. | |
1523 | */ | |
1524 | complete(request->io_request_completion); | |
1525 | } | |
1526 | break; | |
1527 | ||
1528 | case isci_perform_error_io_completion: | |
1529 | /* Use sas_task_abort */ | |
1530 | dev_warn(&host->pdev->dev, | |
1531 | "%s: Error - task = %p, response=%d (%d), status=%d (%d)\n", | |
1532 | __func__, | |
1533 | task, | |
1534 | task->task_status.resp, response, | |
1535 | task->task_status.stat, status); | |
1536 | /* Add to the aborted list. */ | |
1537 | list_add(&request->completed_node, | |
1538 | &host->requests_to_errorback); | |
1539 | break; | |
1540 | ||
1541 | default: | |
1542 | dev_warn(&host->pdev->dev, | |
1543 | "%s: Unknown - task = %p, response=%d (%d), status=%d (%d)\n", | |
1544 | __func__, | |
1545 | task, | |
1546 | task->task_status.resp, response, | |
1547 | task->task_status.stat, status); | |
1548 | ||
1549 | /* Add to the error to libsas list. */ | |
1550 | list_add(&request->completed_node, | |
1551 | &host->requests_to_errorback); | |
1552 | break; | |
1553 | } | |
1554 | } | |
1555 | ||
1556 | static void isci_request_io_request_complete(struct isci_host *isci_host, | |
1557 | struct isci_request *request, | |
1558 | enum sci_io_status completion_status) | |
1559 | { | |
1560 | struct sas_task *task = isci_request_access_task(request); | |
1561 | struct ssp_response_iu *resp_iu; | |
1562 | void *resp_buf; | |
1563 | unsigned long task_flags; | |
1564 | struct isci_remote_device *isci_device = request->isci_device; | |
1565 | enum service_response response = SAS_TASK_UNDELIVERED; | |
1566 | enum exec_status status = SAS_ABORTED_TASK; | |
1567 | enum isci_request_status request_status; | |
1568 | enum isci_completion_selection complete_to_host | |
1569 | = isci_perform_normal_io_completion; | |
1570 | ||
1571 | dev_dbg(&isci_host->pdev->dev, | |
1572 | "%s: request = %p, task = %p,\n" | |
1573 | "task->data_dir = %d completion_status = 0x%x\n", | |
1574 | __func__, | |
1575 | request, | |
1576 | task, | |
1577 | task->data_dir, | |
1578 | completion_status); | |
1579 | ||
1580 | spin_lock(&request->state_lock); | |
1581 | request_status = isci_request_get_state(request); | |
1582 | ||
1583 | /* Decode the request status. Note that if the request has been | |
1584 | * aborted by a task management function, we don't care | |
1585 | * what the status is. | |
1586 | */ | |
1587 | switch (request_status) { | |
1588 | ||
1589 | case aborted: | |
1590 | /* "aborted" indicates that the request was aborted by a task | |
1591 | * management function, since once a task management request is | |
1592 | * perfomed by the device, the request only completes because | |
1593 | * of the subsequent driver terminate. | |
1594 | * | |
1595 | * Aborted also means an external thread is explicitly managing | |
1596 | * this request, so that we do not complete it up the stack. | |
1597 | * | |
1598 | * The target is still there (since the TMF was successful). | |
1599 | */ | |
1600 | request->complete_in_target = true; | |
1601 | response = SAS_TASK_COMPLETE; | |
1602 | ||
1603 | /* See if the device has been/is being stopped. Note | |
1604 | * that we ignore the quiesce state, since we are | |
1605 | * concerned about the actual device state. | |
1606 | */ | |
1607 | if ((isci_device->status == isci_stopping) | |
1608 | || (isci_device->status == isci_stopped) | |
1609 | ) | |
1610 | status = SAS_DEVICE_UNKNOWN; | |
1611 | else | |
1612 | status = SAS_ABORTED_TASK; | |
1613 | ||
1614 | complete_to_host = isci_perform_aborted_io_completion; | |
1615 | /* This was an aborted request. */ | |
1616 | ||
1617 | spin_unlock(&request->state_lock); | |
1618 | break; | |
1619 | ||
1620 | case aborting: | |
1621 | /* aborting means that the task management function tried and | |
1622 | * failed to abort the request. We need to note the request | |
1623 | * as SAS_TASK_UNDELIVERED, so that the scsi mid layer marks the | |
1624 | * target as down. | |
1625 | * | |
1626 | * Aborting also means an external thread is explicitly managing | |
1627 | * this request, so that we do not complete it up the stack. | |
1628 | */ | |
1629 | request->complete_in_target = true; | |
1630 | response = SAS_TASK_UNDELIVERED; | |
1631 | ||
1632 | if ((isci_device->status == isci_stopping) || | |
1633 | (isci_device->status == isci_stopped)) | |
1634 | /* The device has been /is being stopped. Note that | |
1635 | * we ignore the quiesce state, since we are | |
1636 | * concerned about the actual device state. | |
1637 | */ | |
1638 | status = SAS_DEVICE_UNKNOWN; | |
1639 | else | |
1640 | status = SAS_PHY_DOWN; | |
1641 | ||
1642 | complete_to_host = isci_perform_aborted_io_completion; | |
1643 | ||
1644 | /* This was an aborted request. */ | |
1645 | ||
1646 | spin_unlock(&request->state_lock); | |
1647 | break; | |
1648 | ||
1649 | case terminating: | |
1650 | ||
1651 | /* This was an terminated request. This happens when | |
1652 | * the I/O is being terminated because of an action on | |
1653 | * the device (reset, tear down, etc.), and the I/O needs | |
1654 | * to be completed up the stack. | |
1655 | */ | |
1656 | request->complete_in_target = true; | |
1657 | response = SAS_TASK_UNDELIVERED; | |
1658 | ||
1659 | /* See if the device has been/is being stopped. Note | |
1660 | * that we ignore the quiesce state, since we are | |
1661 | * concerned about the actual device state. | |
1662 | */ | |
1663 | if ((isci_device->status == isci_stopping) || | |
1664 | (isci_device->status == isci_stopped)) | |
1665 | status = SAS_DEVICE_UNKNOWN; | |
1666 | else | |
1667 | status = SAS_ABORTED_TASK; | |
1668 | ||
1669 | complete_to_host = isci_perform_aborted_io_completion; | |
1670 | ||
1671 | /* This was a terminated request. */ | |
1672 | ||
1673 | spin_unlock(&request->state_lock); | |
1674 | break; | |
1675 | ||
1676 | default: | |
1677 | ||
1678 | /* The request is done from an SCU HW perspective. */ | |
1679 | request->status = completed; | |
1680 | ||
1681 | spin_unlock(&request->state_lock); | |
1682 | ||
1683 | /* This is an active request being completed from the core. */ | |
1684 | switch (completion_status) { | |
1685 | ||
1686 | case SCI_IO_FAILURE_RESPONSE_VALID: | |
1687 | dev_dbg(&isci_host->pdev->dev, | |
1688 | "%s: SCI_IO_FAILURE_RESPONSE_VALID (%p/%p)\n", | |
1689 | __func__, | |
1690 | request, | |
1691 | task); | |
1692 | ||
1693 | if (sas_protocol_ata(task->task_proto)) { | |
1694 | resp_buf = &request->sci.stp.rsp; | |
1695 | isci_request_process_stp_response(task, | |
1696 | resp_buf); | |
1697 | } else if (SAS_PROTOCOL_SSP == task->task_proto) { | |
1698 | ||
1699 | /* crack the iu response buffer. */ | |
1700 | resp_iu = &request->sci.ssp.rsp; | |
1701 | isci_request_process_response_iu(task, resp_iu, | |
1702 | &isci_host->pdev->dev); | |
1703 | ||
1704 | } else if (SAS_PROTOCOL_SMP == task->task_proto) { | |
1705 | ||
1706 | dev_err(&isci_host->pdev->dev, | |
1707 | "%s: SCI_IO_FAILURE_RESPONSE_VALID: " | |
1708 | "SAS_PROTOCOL_SMP protocol\n", | |
1709 | __func__); | |
1710 | ||
1711 | } else | |
1712 | dev_err(&isci_host->pdev->dev, | |
1713 | "%s: unknown protocol\n", __func__); | |
1714 | ||
1715 | /* use the task status set in the task struct by the | |
1716 | * isci_request_process_response_iu call. | |
1717 | */ | |
1718 | request->complete_in_target = true; | |
1719 | response = task->task_status.resp; | |
1720 | status = task->task_status.stat; | |
1721 | break; | |
1722 | ||
1723 | case SCI_IO_SUCCESS: | |
1724 | case SCI_IO_SUCCESS_IO_DONE_EARLY: | |
1725 | ||
1726 | response = SAS_TASK_COMPLETE; | |
1727 | status = SAM_STAT_GOOD; | |
1728 | request->complete_in_target = true; | |
1729 | ||
1730 | if (task->task_proto == SAS_PROTOCOL_SMP) { | |
1731 | void *rsp = &request->sci.smp.rsp; | |
1732 | ||
1733 | dev_dbg(&isci_host->pdev->dev, | |
1734 | "%s: SMP protocol completion\n", | |
1735 | __func__); | |
1736 | ||
1737 | sg_copy_from_buffer( | |
1738 | &task->smp_task.smp_resp, 1, | |
1739 | rsp, sizeof(struct smp_resp)); | |
1740 | } else if (completion_status | |
1741 | == SCI_IO_SUCCESS_IO_DONE_EARLY) { | |
1742 | ||
1743 | /* This was an SSP / STP / SATA transfer. | |
1744 | * There is a possibility that less data than | |
1745 | * the maximum was transferred. | |
1746 | */ | |
1747 | u32 transferred_length = sci_req_tx_bytes(&request->sci); | |
1748 | ||
1749 | task->task_status.residual | |
1750 | = task->total_xfer_len - transferred_length; | |
1751 | ||
1752 | /* If there were residual bytes, call this an | |
1753 | * underrun. | |
1754 | */ | |
1755 | if (task->task_status.residual != 0) | |
1756 | status = SAS_DATA_UNDERRUN; | |
1757 | ||
1758 | dev_dbg(&isci_host->pdev->dev, | |
1759 | "%s: SCI_IO_SUCCESS_IO_DONE_EARLY %d\n", | |
1760 | __func__, | |
1761 | status); | |
1762 | ||
1763 | } else | |
1764 | dev_dbg(&isci_host->pdev->dev, | |
1765 | "%s: SCI_IO_SUCCESS\n", | |
1766 | __func__); | |
1767 | ||
1768 | break; | |
1769 | ||
1770 | case SCI_IO_FAILURE_TERMINATED: | |
1771 | dev_dbg(&isci_host->pdev->dev, | |
1772 | "%s: SCI_IO_FAILURE_TERMINATED (%p/%p)\n", | |
1773 | __func__, | |
1774 | request, | |
1775 | task); | |
1776 | ||
1777 | /* The request was terminated explicitly. No handling | |
1778 | * is needed in the SCSI error handler path. | |
1779 | */ | |
1780 | request->complete_in_target = true; | |
1781 | response = SAS_TASK_UNDELIVERED; | |
1782 | ||
1783 | /* See if the device has been/is being stopped. Note | |
1784 | * that we ignore the quiesce state, since we are | |
1785 | * concerned about the actual device state. | |
1786 | */ | |
1787 | if ((isci_device->status == isci_stopping) || | |
1788 | (isci_device->status == isci_stopped)) | |
1789 | status = SAS_DEVICE_UNKNOWN; | |
1790 | else | |
1791 | status = SAS_ABORTED_TASK; | |
1792 | ||
1793 | complete_to_host = isci_perform_normal_io_completion; | |
1794 | break; | |
1795 | ||
1796 | case SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR: | |
1797 | ||
1798 | isci_request_handle_controller_specific_errors( | |
1799 | isci_device, request, task, &response, &status, | |
1800 | &complete_to_host); | |
1801 | ||
1802 | break; | |
1803 | ||
1804 | case SCI_IO_FAILURE_REMOTE_DEVICE_RESET_REQUIRED: | |
1805 | /* This is a special case, in that the I/O completion | |
1806 | * is telling us that the device needs a reset. | |
1807 | * In order for the device reset condition to be | |
1808 | * noticed, the I/O has to be handled in the error | |
1809 | * handler. Set the reset flag and cause the | |
1810 | * SCSI error thread to be scheduled. | |
1811 | */ | |
1812 | spin_lock_irqsave(&task->task_state_lock, task_flags); | |
1813 | task->task_state_flags |= SAS_TASK_NEED_DEV_RESET; | |
6f231dda DW |
1814 | spin_unlock_irqrestore(&task->task_state_lock, task_flags); |
1815 | ||
f1f52e75 DW |
1816 | /* Fail the I/O. */ |
1817 | response = SAS_TASK_UNDELIVERED; | |
1818 | status = SAM_STAT_TASK_ABORTED; | |
1819 | ||
1820 | complete_to_host = isci_perform_error_io_completion; | |
1821 | request->complete_in_target = false; | |
1822 | break; | |
1823 | ||
1824 | default: | |
1825 | /* Catch any otherwise unhandled error codes here. */ | |
1826 | dev_warn(&isci_host->pdev->dev, | |
1827 | "%s: invalid completion code: 0x%x - " | |
1828 | "isci_request = %p\n", | |
1829 | __func__, completion_status, request); | |
1830 | ||
1831 | response = SAS_TASK_UNDELIVERED; | |
1832 | ||
1833 | /* See if the device has been/is being stopped. Note | |
1834 | * that we ignore the quiesce state, since we are | |
1835 | * concerned about the actual device state. | |
1836 | */ | |
1837 | if ((isci_device->status == isci_stopping) || | |
1838 | (isci_device->status == isci_stopped)) | |
1839 | status = SAS_DEVICE_UNKNOWN; | |
1840 | else | |
1841 | status = SAS_ABORTED_TASK; | |
1842 | ||
1843 | complete_to_host = isci_perform_error_io_completion; | |
1844 | request->complete_in_target = false; | |
1845 | break; | |
1846 | } | |
1847 | break; | |
1848 | } | |
1849 | ||
1850 | isci_request_unmap_sgl(request, isci_host->pdev); | |
1851 | ||
1852 | /* Put the completed request on the correct list */ | |
1853 | isci_task_save_for_upper_layer_completion(isci_host, request, response, | |
1854 | status, complete_to_host | |
1855 | ); | |
1856 | ||
1857 | /* complete the io request to the core. */ | |
1858 | scic_controller_complete_io(&isci_host->sci, | |
1859 | &isci_device->sci, | |
1860 | &request->sci); | |
1861 | /* set terminated handle so it cannot be completed or | |
1862 | * terminated again, and to cause any calls into abort | |
1863 | * task to recognize the already completed case. | |
1864 | */ | |
1865 | request->terminated = true; | |
1866 | ||
1867 | isci_host_can_dequeue(isci_host, 1); | |
1868 | } | |
1869 | ||
1870 | /** | |
1871 | * scic_sds_request_initial_state_enter() - | |
1872 | * @object: This parameter specifies the base object for which the state | |
1873 | * transition is occurring. | |
1874 | * | |
1875 | * This method implements the actions taken when entering the | |
1876 | * SCI_BASE_REQUEST_STATE_INITIAL state. This state is entered when the initial | |
1877 | * base request is constructed. Entry into the initial state sets all handlers | |
1878 | * for the io request object to their default handlers. none | |
1879 | */ | |
1880 | static void scic_sds_request_initial_state_enter(void *object) | |
1881 | { | |
1882 | struct scic_sds_request *sci_req = object; | |
1883 | ||
1884 | SET_STATE_HANDLER( | |
1885 | sci_req, | |
1886 | scic_sds_request_state_handler_table, | |
1887 | SCI_BASE_REQUEST_STATE_INITIAL | |
1888 | ); | |
1889 | } | |
1890 | ||
1891 | /** | |
1892 | * scic_sds_request_constructed_state_enter() - | |
1893 | * @object: The io request object that is to enter the constructed state. | |
1894 | * | |
1895 | * This method implements the actions taken when entering the | |
1896 | * SCI_BASE_REQUEST_STATE_CONSTRUCTED state. The method sets the state handlers | |
1897 | * for the the constructed state. none | |
1898 | */ | |
1899 | static void scic_sds_request_constructed_state_enter(void *object) | |
1900 | { | |
1901 | struct scic_sds_request *sci_req = object; | |
1902 | ||
1903 | SET_STATE_HANDLER( | |
1904 | sci_req, | |
1905 | scic_sds_request_state_handler_table, | |
1906 | SCI_BASE_REQUEST_STATE_CONSTRUCTED | |
1907 | ); | |
1908 | } | |
1909 | ||
1910 | /** | |
1911 | * scic_sds_request_started_state_enter() - | |
1912 | * @object: This parameter specifies the base object for which the state | |
1913 | * transition is occurring. This is cast into a SCIC_SDS_IO_REQUEST object. | |
1914 | * | |
1915 | * This method implements the actions taken when entering the | |
1916 | * SCI_BASE_REQUEST_STATE_STARTED state. If the io request object type is a | |
1917 | * SCSI Task request we must enter the started substate machine. none | |
1918 | */ | |
1919 | static void scic_sds_request_started_state_enter(void *object) | |
1920 | { | |
1921 | struct scic_sds_request *sci_req = object; | |
1922 | ||
1923 | SET_STATE_HANDLER( | |
1924 | sci_req, | |
1925 | scic_sds_request_state_handler_table, | |
1926 | SCI_BASE_REQUEST_STATE_STARTED | |
1927 | ); | |
1928 | ||
1929 | /* | |
1930 | * Most of the request state machines have a started substate machine so | |
1931 | * start its execution on the entry to the started state. */ | |
1932 | if (sci_req->has_started_substate_machine == true) | |
1933 | sci_base_state_machine_start(&sci_req->started_substate_machine); | |
1934 | } | |
1935 | ||
1936 | /** | |
1937 | * scic_sds_request_started_state_exit() - | |
1938 | * @object: This parameter specifies the base object for which the state | |
1939 | * transition is occurring. This object is cast into a SCIC_SDS_IO_REQUEST | |
1940 | * object. | |
1941 | * | |
1942 | * This method implements the actions taken when exiting the | |
1943 | * SCI_BASE_REQUEST_STATE_STARTED state. For task requests the action will be | |
1944 | * to stop the started substate machine. none | |
1945 | */ | |
1946 | static void scic_sds_request_started_state_exit(void *object) | |
1947 | { | |
1948 | struct scic_sds_request *sci_req = object; | |
1949 | ||
1950 | if (sci_req->has_started_substate_machine == true) | |
1951 | sci_base_state_machine_stop(&sci_req->started_substate_machine); | |
1952 | } | |
1953 | ||
1954 | /** | |
1955 | * scic_sds_request_completed_state_enter() - | |
1956 | * @object: This parameter specifies the base object for which the state | |
1957 | * transition is occurring. This object is cast into a SCIC_SDS_IO_REQUEST | |
1958 | * object. | |
1959 | * | |
1960 | * This method implements the actions taken when entering the | |
1961 | * SCI_BASE_REQUEST_STATE_COMPLETED state. This state is entered when the | |
1962 | * SCIC_SDS_IO_REQUEST has completed. The method will decode the request | |
1963 | * completion status and convert it to an enum sci_status to return in the | |
1964 | * completion callback function. none | |
1965 | */ | |
1966 | static void scic_sds_request_completed_state_enter(void *object) | |
1967 | { | |
1968 | struct scic_sds_request *sci_req = object; | |
1969 | struct scic_sds_controller *scic = | |
1970 | scic_sds_request_get_controller(sci_req); | |
1971 | struct isci_host *ihost = scic_to_ihost(scic); | |
1972 | struct isci_request *ireq = sci_req_to_ireq(sci_req); | |
1973 | ||
1974 | SET_STATE_HANDLER(sci_req, | |
1975 | scic_sds_request_state_handler_table, | |
1976 | SCI_BASE_REQUEST_STATE_COMPLETED); | |
1977 | ||
1978 | /* Tell the SCI_USER that the IO request is complete */ | |
1979 | if (sci_req->is_task_management_request == false) | |
1980 | isci_request_io_request_complete(ihost, ireq, | |
1981 | sci_req->sci_status); | |
1982 | else | |
1983 | isci_task_request_complete(ihost, ireq, sci_req->sci_status); | |
1984 | } | |
1985 | ||
1986 | /** | |
1987 | * scic_sds_request_aborting_state_enter() - | |
1988 | * @object: This parameter specifies the base object for which the state | |
1989 | * transition is occurring. This object is cast into a SCIC_SDS_IO_REQUEST | |
1990 | * object. | |
1991 | * | |
1992 | * This method implements the actions taken when entering the | |
1993 | * SCI_BASE_REQUEST_STATE_ABORTING state. none | |
1994 | */ | |
1995 | static void scic_sds_request_aborting_state_enter(void *object) | |
1996 | { | |
1997 | struct scic_sds_request *sci_req = object; | |
1998 | ||
1999 | /* Setting the abort bit in the Task Context is required by the silicon. */ | |
2000 | sci_req->task_context_buffer->abort = 1; | |
2001 | ||
2002 | SET_STATE_HANDLER( | |
2003 | sci_req, | |
2004 | scic_sds_request_state_handler_table, | |
2005 | SCI_BASE_REQUEST_STATE_ABORTING | |
2006 | ); | |
2007 | } | |
2008 | ||
2009 | /** | |
2010 | * scic_sds_request_final_state_enter() - | |
2011 | * @object: This parameter specifies the base object for which the state | |
2012 | * transition is occurring. This is cast into a SCIC_SDS_IO_REQUEST object. | |
2013 | * | |
2014 | * This method implements the actions taken when entering the | |
2015 | * SCI_BASE_REQUEST_STATE_FINAL state. The only action required is to put the | |
2016 | * state handlers in place. none | |
2017 | */ | |
2018 | static void scic_sds_request_final_state_enter(void *object) | |
2019 | { | |
2020 | struct scic_sds_request *sci_req = object; | |
2021 | ||
2022 | SET_STATE_HANDLER( | |
2023 | sci_req, | |
2024 | scic_sds_request_state_handler_table, | |
2025 | SCI_BASE_REQUEST_STATE_FINAL | |
2026 | ); | |
2027 | } | |
2028 | ||
2029 | static const struct sci_base_state scic_sds_request_state_table[] = { | |
2030 | [SCI_BASE_REQUEST_STATE_INITIAL] = { | |
2031 | .enter_state = scic_sds_request_initial_state_enter, | |
2032 | }, | |
2033 | [SCI_BASE_REQUEST_STATE_CONSTRUCTED] = { | |
2034 | .enter_state = scic_sds_request_constructed_state_enter, | |
2035 | }, | |
2036 | [SCI_BASE_REQUEST_STATE_STARTED] = { | |
2037 | .enter_state = scic_sds_request_started_state_enter, | |
2038 | .exit_state = scic_sds_request_started_state_exit | |
2039 | }, | |
2040 | [SCI_BASE_REQUEST_STATE_COMPLETED] = { | |
2041 | .enter_state = scic_sds_request_completed_state_enter, | |
2042 | }, | |
2043 | [SCI_BASE_REQUEST_STATE_ABORTING] = { | |
2044 | .enter_state = scic_sds_request_aborting_state_enter, | |
2045 | }, | |
2046 | [SCI_BASE_REQUEST_STATE_FINAL] = { | |
2047 | .enter_state = scic_sds_request_final_state_enter, | |
2048 | }, | |
2049 | }; | |
2050 | ||
2051 | static void scic_sds_general_request_construct(struct scic_sds_controller *scic, | |
2052 | struct scic_sds_remote_device *sci_dev, | |
2053 | u16 io_tag, struct scic_sds_request *sci_req) | |
2054 | { | |
2055 | sci_base_state_machine_construct(&sci_req->state_machine, sci_req, | |
2056 | scic_sds_request_state_table, SCI_BASE_REQUEST_STATE_INITIAL); | |
2057 | sci_base_state_machine_start(&sci_req->state_machine); | |
2058 | ||
2059 | sci_req->io_tag = io_tag; | |
2060 | sci_req->owning_controller = scic; | |
2061 | sci_req->target_device = sci_dev; | |
2062 | sci_req->has_started_substate_machine = false; | |
2063 | sci_req->protocol = SCIC_NO_PROTOCOL; | |
2064 | sci_req->saved_rx_frame_index = SCU_INVALID_FRAME_INDEX; | |
2065 | sci_req->device_sequence = scic_sds_remote_device_get_sequence(sci_dev); | |
2066 | ||
2067 | sci_req->sci_status = SCI_SUCCESS; | |
2068 | sci_req->scu_status = 0; | |
2069 | sci_req->post_context = 0xFFFFFFFF; | |
2070 | ||
2071 | sci_req->is_task_management_request = false; | |
2072 | ||
2073 | if (io_tag == SCI_CONTROLLER_INVALID_IO_TAG) { | |
2074 | sci_req->was_tag_assigned_by_user = false; | |
2075 | sci_req->task_context_buffer = NULL; | |
2076 | } else { | |
2077 | sci_req->was_tag_assigned_by_user = true; | |
2078 | ||
2079 | sci_req->task_context_buffer = | |
2080 | scic_sds_controller_get_task_context_buffer(scic, io_tag); | |
2081 | } | |
2082 | } | |
2083 | ||
2084 | static enum sci_status | |
2085 | scic_io_request_construct(struct scic_sds_controller *scic, | |
2086 | struct scic_sds_remote_device *sci_dev, | |
2087 | u16 io_tag, struct scic_sds_request *sci_req) | |
2088 | { | |
2089 | struct domain_device *dev = sci_dev_to_domain(sci_dev); | |
2090 | enum sci_status status = SCI_SUCCESS; | |
2091 | ||
2092 | /* Build the common part of the request */ | |
2093 | scic_sds_general_request_construct(scic, sci_dev, io_tag, sci_req); | |
2094 | ||
2095 | if (sci_dev->rnc.remote_node_index == | |
2096 | SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX) | |
2097 | return SCI_FAILURE_INVALID_REMOTE_DEVICE; | |
2098 | ||
2099 | if (dev->dev_type == SAS_END_DEV) | |
2100 | scic_sds_ssp_io_request_assign_buffers(sci_req); | |
2101 | else if ((dev->dev_type == SATA_DEV) || | |
2102 | (dev->tproto & SAS_PROTOCOL_STP)) { | |
2103 | scic_sds_stp_request_assign_buffers(sci_req); | |
2104 | memset(&sci_req->stp.cmd, 0, sizeof(sci_req->stp.cmd)); | |
2105 | } else if (dev_is_expander(dev)) { | |
2106 | scic_sds_smp_request_assign_buffers(sci_req); | |
2107 | memset(&sci_req->smp.cmd, 0, sizeof(sci_req->smp.cmd)); | |
2108 | } else | |
2109 | status = SCI_FAILURE_UNSUPPORTED_PROTOCOL; | |
2110 | ||
2111 | if (status == SCI_SUCCESS) { | |
2112 | memset(sci_req->task_context_buffer, 0, | |
2113 | offsetof(struct scu_task_context, sgl_pair_ab)); | |
2114 | } | |
2115 | ||
2116 | return status; | |
2117 | } | |
2118 | ||
2119 | enum sci_status scic_task_request_construct(struct scic_sds_controller *scic, | |
2120 | struct scic_sds_remote_device *sci_dev, | |
2121 | u16 io_tag, struct scic_sds_request *sci_req) | |
2122 | { | |
2123 | struct domain_device *dev = sci_dev_to_domain(sci_dev); | |
2124 | enum sci_status status = SCI_SUCCESS; | |
2125 | ||
2126 | /* Build the common part of the request */ | |
2127 | scic_sds_general_request_construct(scic, sci_dev, io_tag, sci_req); | |
2128 | ||
2129 | if (dev->dev_type == SAS_END_DEV) { | |
2130 | scic_sds_ssp_task_request_assign_buffers(sci_req); | |
2131 | ||
2132 | sci_req->has_started_substate_machine = true; | |
2133 | ||
2134 | /* Construct the started sub-state machine. */ | |
2135 | sci_base_state_machine_construct( | |
2136 | &sci_req->started_substate_machine, | |
2137 | sci_req, | |
2138 | scic_sds_io_request_started_task_mgmt_substate_table, | |
2139 | SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION | |
2140 | ); | |
2141 | } else if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) | |
2142 | scic_sds_stp_request_assign_buffers(sci_req); | |
2143 | else | |
2144 | status = SCI_FAILURE_UNSUPPORTED_PROTOCOL; | |
2145 | ||
2146 | if (status == SCI_SUCCESS) { | |
2147 | sci_req->is_task_management_request = true; | |
2148 | memset(sci_req->task_context_buffer, 0, sizeof(struct scu_task_context)); | |
2149 | } | |
2150 | ||
2151 | return status; | |
2152 | } | |
2153 | ||
2154 | static enum sci_status isci_request_ssp_request_construct( | |
2155 | struct isci_request *request) | |
2156 | { | |
2157 | enum sci_status status; | |
2158 | ||
2159 | dev_dbg(&request->isci_host->pdev->dev, | |
2160 | "%s: request = %p\n", | |
2161 | __func__, | |
2162 | request); | |
2163 | status = scic_io_request_construct_basic_ssp(&request->sci); | |
2164 | return status; | |
2165 | } | |
2166 | ||
2167 | static enum sci_status isci_request_stp_request_construct( | |
2168 | struct isci_request *request) | |
2169 | { | |
2170 | struct sas_task *task = isci_request_access_task(request); | |
2171 | enum sci_status status; | |
2172 | struct host_to_dev_fis *register_fis; | |
2173 | ||
2174 | dev_dbg(&request->isci_host->pdev->dev, | |
2175 | "%s: request = %p\n", | |
2176 | __func__, | |
2177 | request); | |
2178 | ||
2179 | /* Get the host_to_dev_fis from the core and copy | |
2180 | * the fis from the task into it. | |
2181 | */ | |
2182 | register_fis = isci_sata_task_to_fis_copy(task); | |
2183 | ||
2184 | status = scic_io_request_construct_basic_sata(&request->sci); | |
2185 | ||
2186 | /* Set the ncq tag in the fis, from the queue | |
2187 | * command in the task. | |
2188 | */ | |
2189 | if (isci_sata_is_task_ncq(task)) { | |
2190 | ||
2191 | isci_sata_set_ncq_tag( | |
2192 | register_fis, | |
2193 | task | |
2194 | ); | |
2195 | } | |
2196 | ||
2197 | return status; | |
2198 | } | |
2199 | ||
2200 | /* | |
2201 | * isci_smp_request_build() - This function builds the smp request. | |
2202 | * @ireq: This parameter points to the isci_request allocated in the | |
2203 | * request construct function. | |
2204 | * | |
2205 | * SCI_SUCCESS on successfull completion, or specific failure code. | |
2206 | */ | |
2207 | static enum sci_status isci_smp_request_build(struct isci_request *ireq) | |
2208 | { | |
2209 | enum sci_status status = SCI_FAILURE; | |
2210 | struct sas_task *task = isci_request_access_task(ireq); | |
2211 | struct scic_sds_request *sci_req = &ireq->sci; | |
2212 | ||
2213 | dev_dbg(&ireq->isci_host->pdev->dev, | |
2214 | "%s: request = %p\n", __func__, ireq); | |
2215 | ||
2216 | dev_dbg(&ireq->isci_host->pdev->dev, | |
2217 | "%s: smp_req len = %d\n", | |
2218 | __func__, | |
2219 | task->smp_task.smp_req.length); | |
2220 | ||
2221 | /* copy the smp_command to the address; */ | |
2222 | sg_copy_to_buffer(&task->smp_task.smp_req, 1, | |
2223 | &sci_req->smp.cmd, | |
2224 | sizeof(struct smp_req)); | |
2225 | ||
2226 | status = scic_io_request_construct_smp(sci_req); | |
2227 | if (status != SCI_SUCCESS) | |
2228 | dev_warn(&ireq->isci_host->pdev->dev, | |
2229 | "%s: failed with status = %d\n", | |
2230 | __func__, | |
2231 | status); | |
2232 | ||
2233 | return status; | |
2234 | } | |
2235 | ||
2236 | /** | |
2237 | * isci_io_request_build() - This function builds the io request object. | |
2238 | * @isci_host: This parameter specifies the ISCI host object | |
2239 | * @request: This parameter points to the isci_request object allocated in the | |
2240 | * request construct function. | |
2241 | * @sci_device: This parameter is the handle for the sci core's remote device | |
2242 | * object that is the destination for this request. | |
2243 | * | |
2244 | * SCI_SUCCESS on successfull completion, or specific failure code. | |
2245 | */ | |
2246 | static enum sci_status isci_io_request_build( | |
2247 | struct isci_host *isci_host, | |
2248 | struct isci_request *request, | |
2249 | struct isci_remote_device *isci_device) | |
2250 | { | |
2251 | enum sci_status status = SCI_SUCCESS; | |
2252 | struct sas_task *task = isci_request_access_task(request); | |
2253 | struct scic_sds_remote_device *sci_device = &isci_device->sci; | |
2254 | ||
2255 | dev_dbg(&isci_host->pdev->dev, | |
2256 | "%s: isci_device = 0x%p; request = %p, " | |
2257 | "num_scatter = %d\n", | |
2258 | __func__, | |
2259 | isci_device, | |
2260 | request, | |
2261 | task->num_scatter); | |
2262 | ||
2263 | /* map the sgl addresses, if present. | |
2264 | * libata does the mapping for sata devices | |
2265 | * before we get the request. | |
2266 | */ | |
2267 | if (task->num_scatter && | |
2268 | !sas_protocol_ata(task->task_proto) && | |
2269 | !(SAS_PROTOCOL_SMP & task->task_proto)) { | |
2270 | ||
2271 | request->num_sg_entries = dma_map_sg( | |
2272 | &isci_host->pdev->dev, | |
2273 | task->scatter, | |
2274 | task->num_scatter, | |
2275 | task->data_dir | |
2276 | ); | |
2277 | ||
2278 | if (request->num_sg_entries == 0) | |
2279 | return SCI_FAILURE_INSUFFICIENT_RESOURCES; | |
2280 | } | |
2281 | ||
2282 | /* build the common request object. For now, | |
2283 | * we will let the core allocate the IO tag. | |
2284 | */ | |
2285 | status = scic_io_request_construct(&isci_host->sci, sci_device, | |
2286 | SCI_CONTROLLER_INVALID_IO_TAG, | |
2287 | &request->sci); | |
2288 | ||
2289 | if (status != SCI_SUCCESS) { | |
2290 | dev_warn(&isci_host->pdev->dev, | |
2291 | "%s: failed request construct\n", | |
2292 | __func__); | |
2293 | return SCI_FAILURE; | |
2294 | } | |
2295 | ||
2296 | switch (task->task_proto) { | |
2297 | case SAS_PROTOCOL_SMP: | |
2298 | status = isci_smp_request_build(request); | |
2299 | break; | |
2300 | case SAS_PROTOCOL_SSP: | |
2301 | status = isci_request_ssp_request_construct(request); | |
2302 | break; | |
2303 | case SAS_PROTOCOL_SATA: | |
2304 | case SAS_PROTOCOL_STP: | |
2305 | case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP: | |
2306 | status = isci_request_stp_request_construct(request); | |
2307 | break; | |
2308 | default: | |
2309 | dev_warn(&isci_host->pdev->dev, | |
2310 | "%s: unknown protocol\n", __func__); | |
2311 | return SCI_FAILURE; | |
2312 | } | |
2313 | ||
2314 | return SCI_SUCCESS; | |
2315 | } | |
2316 | ||
2317 | /** | |
2318 | * isci_request_alloc_core() - This function gets the request object from the | |
2319 | * isci_host dma cache. | |
2320 | * @isci_host: This parameter specifies the ISCI host object | |
2321 | * @isci_request: This parameter will contain the pointer to the new | |
2322 | * isci_request object. | |
2323 | * @isci_device: This parameter is the pointer to the isci remote device object | |
2324 | * that is the destination for this request. | |
2325 | * @gfp_flags: This parameter specifies the os allocation flags. | |
2326 | * | |
2327 | * SCI_SUCCESS on successfull completion, or specific failure code. | |
2328 | */ | |
2329 | static int isci_request_alloc_core( | |
2330 | struct isci_host *isci_host, | |
2331 | struct isci_request **isci_request, | |
2332 | struct isci_remote_device *isci_device, | |
2333 | gfp_t gfp_flags) | |
2334 | { | |
2335 | int ret = 0; | |
2336 | dma_addr_t handle; | |
2337 | struct isci_request *request; | |
2338 | ||
aa145102 | 2339 | |
f1f52e75 DW |
2340 | /* get pointer to dma memory. This actually points |
2341 | * to both the isci_remote_device object and the | |
2342 | * sci object. The isci object is at the beginning | |
2343 | * of the memory allocated here. | |
2344 | */ | |
2345 | request = dma_pool_alloc(isci_host->dma_pool, gfp_flags, &handle); | |
2346 | if (!request) { | |
2347 | dev_warn(&isci_host->pdev->dev, | |
2348 | "%s: dma_pool_alloc returned NULL\n", __func__); | |
2349 | return -ENOMEM; | |
2350 | } | |
6f231dda | 2351 | |
f1f52e75 DW |
2352 | /* initialize the request object. */ |
2353 | spin_lock_init(&request->state_lock); | |
2354 | request->request_daddr = handle; | |
2355 | request->isci_host = isci_host; | |
2356 | request->isci_device = isci_device; | |
2357 | request->io_request_completion = NULL; | |
2358 | request->terminated = false; | |
6f231dda | 2359 | |
f1f52e75 | 2360 | request->num_sg_entries = 0; |
6f231dda | 2361 | |
f1f52e75 | 2362 | request->complete_in_target = false; |
6f231dda | 2363 | |
f1f52e75 DW |
2364 | INIT_LIST_HEAD(&request->completed_node); |
2365 | INIT_LIST_HEAD(&request->dev_node); | |
2366 | ||
2367 | *isci_request = request; | |
2368 | isci_request_change_state(request, allocated); | |
2369 | ||
2370 | return ret; | |
2371 | } | |
2372 | ||
2373 | static int isci_request_alloc_io( | |
2374 | struct isci_host *isci_host, | |
2375 | struct sas_task *task, | |
2376 | struct isci_request **isci_request, | |
2377 | struct isci_remote_device *isci_device, | |
2378 | gfp_t gfp_flags) | |
2379 | { | |
2380 | int retval = isci_request_alloc_core(isci_host, isci_request, | |
2381 | isci_device, gfp_flags); | |
2382 | ||
2383 | if (!retval) { | |
2384 | (*isci_request)->ttype_ptr.io_task_ptr = task; | |
2385 | (*isci_request)->ttype = io_task; | |
2386 | ||
2387 | task->lldd_task = *isci_request; | |
6f231dda | 2388 | } |
f1f52e75 DW |
2389 | return retval; |
2390 | } | |
6f231dda | 2391 | |
f1f52e75 DW |
2392 | /** |
2393 | * isci_request_alloc_tmf() - This function gets the request object from the | |
2394 | * isci_host dma cache and initializes the relevant fields as a sas_task. | |
2395 | * @isci_host: This parameter specifies the ISCI host object | |
2396 | * @sas_task: This parameter is the task struct from the upper layer driver. | |
2397 | * @isci_request: This parameter will contain the pointer to the new | |
2398 | * isci_request object. | |
2399 | * @isci_device: This parameter is the pointer to the isci remote device object | |
2400 | * that is the destination for this request. | |
2401 | * @gfp_flags: This parameter specifies the os allocation flags. | |
2402 | * | |
2403 | * SCI_SUCCESS on successfull completion, or specific failure code. | |
2404 | */ | |
2405 | int isci_request_alloc_tmf( | |
2406 | struct isci_host *isci_host, | |
2407 | struct isci_tmf *isci_tmf, | |
2408 | struct isci_request **isci_request, | |
2409 | struct isci_remote_device *isci_device, | |
2410 | gfp_t gfp_flags) | |
2411 | { | |
2412 | int retval = isci_request_alloc_core(isci_host, isci_request, | |
2413 | isci_device, gfp_flags); | |
6f231dda | 2414 | |
f1f52e75 | 2415 | if (!retval) { |
6f231dda | 2416 | |
f1f52e75 DW |
2417 | (*isci_request)->ttype_ptr.tmf_task_ptr = isci_tmf; |
2418 | (*isci_request)->ttype = tmf_task; | |
2419 | } | |
2420 | return retval; | |
2421 | } | |
2422 | ||
2423 | /** | |
2424 | * isci_request_execute() - This function allocates the isci_request object, | |
2425 | * all fills in some common fields. | |
2426 | * @isci_host: This parameter specifies the ISCI host object | |
2427 | * @sas_task: This parameter is the task struct from the upper layer driver. | |
2428 | * @isci_request: This parameter will contain the pointer to the new | |
2429 | * isci_request object. | |
2430 | * @gfp_flags: This parameter specifies the os allocation flags. | |
2431 | * | |
2432 | * SCI_SUCCESS on successfull completion, or specific failure code. | |
2433 | */ | |
2434 | int isci_request_execute( | |
2435 | struct isci_host *isci_host, | |
2436 | struct sas_task *task, | |
2437 | struct isci_request **isci_request, | |
2438 | gfp_t gfp_flags) | |
2439 | { | |
2440 | int ret = 0; | |
2441 | struct scic_sds_remote_device *sci_device; | |
2442 | enum sci_status status = SCI_FAILURE_UNSUPPORTED_PROTOCOL; | |
2443 | struct isci_remote_device *isci_device; | |
2444 | struct isci_request *request; | |
2445 | unsigned long flags; | |
2446 | ||
2447 | isci_device = task->dev->lldd_dev; | |
2448 | sci_device = &isci_device->sci; | |
2449 | ||
2450 | /* do common allocation and init of request object. */ | |
2451 | ret = isci_request_alloc_io( | |
2452 | isci_host, | |
2453 | task, | |
2454 | &request, | |
2455 | isci_device, | |
2456 | gfp_flags | |
2457 | ); | |
2458 | ||
2459 | if (ret) | |
2460 | goto out; | |
2461 | ||
2462 | status = isci_io_request_build(isci_host, request, isci_device); | |
2463 | if (status != SCI_SUCCESS) { | |
2464 | dev_warn(&isci_host->pdev->dev, | |
2465 | "%s: request_construct failed - status = 0x%x\n", | |
2466 | __func__, | |
2467 | status); | |
2468 | goto out; | |
2469 | } | |
2470 | ||
2471 | spin_lock_irqsave(&isci_host->scic_lock, flags); | |
2472 | ||
2473 | /* send the request, let the core assign the IO TAG. */ | |
2474 | status = scic_controller_start_io(&isci_host->sci, sci_device, | |
2475 | &request->sci, | |
2476 | SCI_CONTROLLER_INVALID_IO_TAG); | |
2477 | if (status != SCI_SUCCESS && | |
2478 | status != SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) { | |
2479 | dev_warn(&isci_host->pdev->dev, | |
2480 | "%s: failed request start (0x%x)\n", | |
2481 | __func__, status); | |
2482 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
2483 | goto out; | |
2484 | } | |
2485 | ||
2486 | /* Either I/O started OK, or the core has signaled that | |
2487 | * the device needs a target reset. | |
2488 | * | |
2489 | * In either case, hold onto the I/O for later. | |
2490 | * | |
2491 | * Update it's status and add it to the list in the | |
2492 | * remote device object. | |
6f231dda | 2493 | */ |
f1f52e75 DW |
2494 | isci_request_change_state(request, started); |
2495 | list_add(&request->dev_node, &isci_device->reqs_in_process); | |
6f231dda | 2496 | |
f1f52e75 DW |
2497 | if (status == SCI_SUCCESS) { |
2498 | /* Save the tag for possible task mgmt later. */ | |
2499 | request->io_tag = request->sci.io_tag; | |
2500 | } else { | |
2501 | /* The request did not really start in the | |
2502 | * hardware, so clear the request handle | |
2503 | * here so no terminations will be done. | |
2504 | */ | |
2505 | request->terminated = true; | |
2506 | } | |
2507 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
2508 | ||
2509 | if (status == | |
2510 | SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) { | |
2511 | /* Signal libsas that we need the SCSI error | |
2512 | * handler thread to work on this I/O and that | |
2513 | * we want a device reset. | |
2514 | */ | |
2515 | spin_lock_irqsave(&task->task_state_lock, flags); | |
2516 | task->task_state_flags |= SAS_TASK_NEED_DEV_RESET; | |
2517 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
2518 | ||
2519 | /* Cause this task to be scheduled in the SCSI error | |
2520 | * handler thread. | |
2521 | */ | |
2522 | isci_execpath_callback(isci_host, task, | |
2523 | sas_task_abort); | |
2524 | ||
2525 | /* Change the status, since we are holding | |
2526 | * the I/O until it is managed by the SCSI | |
2527 | * error handler. | |
2528 | */ | |
2529 | status = SCI_SUCCESS; | |
2530 | } | |
2531 | ||
2532 | out: | |
2533 | if (status != SCI_SUCCESS) { | |
2534 | /* release dma memory on failure. */ | |
2535 | isci_request_free(isci_host, request); | |
2536 | request = NULL; | |
2537 | ret = SCI_FAILURE; | |
2538 | } | |
2539 | ||
2540 | *isci_request = request; | |
2541 | return ret; | |
6f231dda | 2542 | } |
f1f52e75 DW |
2543 | |
2544 | ||
2545 |