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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 "scic_port.h" |
58 | #include "task.h" | |
59 | #include "request.h" | |
60 | #include "sata.h" | |
61 | #include "scu_completion_codes.h" | |
2ec53eb4 | 62 | #include "sas.h" |
6f231dda | 63 | |
f1f52e75 DW |
64 | /** |
65 | * This method returns the sgl element pair for the specificed sgl_pair index. | |
66 | * @sci_req: This parameter specifies the IO request for which to retrieve | |
67 | * the Scatter-Gather List element pair. | |
68 | * @sgl_pair_index: This parameter specifies the index into the SGL element | |
69 | * pair to be retrieved. | |
70 | * | |
71 | * This method returns a pointer to an struct scu_sgl_element_pair. | |
72 | */ | |
73 | static struct scu_sgl_element_pair *scic_sds_request_get_sgl_element_pair( | |
74 | struct scic_sds_request *sci_req, | |
75 | u32 sgl_pair_index | |
76 | ) { | |
77 | struct scu_task_context *task_context; | |
78 | ||
79 | task_context = (struct scu_task_context *)sci_req->task_context_buffer; | |
80 | ||
81 | if (sgl_pair_index == 0) { | |
82 | return &task_context->sgl_pair_ab; | |
83 | } else if (sgl_pair_index == 1) { | |
84 | return &task_context->sgl_pair_cd; | |
85 | } | |
6f231dda | 86 | |
f1f52e75 | 87 | return &sci_req->sg_table[sgl_pair_index - 2]; |
6f231dda DW |
88 | } |
89 | ||
f1f52e75 DW |
90 | /** |
91 | * This function will build the SGL list for an IO request. | |
92 | * @sci_req: This parameter specifies the IO request for which to build | |
93 | * the Scatter-Gather List. | |
94 | * | |
95 | */ | |
96 | void scic_sds_request_build_sgl(struct scic_sds_request *sds_request) | |
6f231dda | 97 | { |
f1f52e75 DW |
98 | struct isci_request *isci_request = sci_req_to_ireq(sds_request); |
99 | struct isci_host *isci_host = isci_request->isci_host; | |
100 | struct sas_task *task = isci_request_access_task(isci_request); | |
101 | struct scatterlist *sg = NULL; | |
102 | dma_addr_t dma_addr; | |
103 | u32 sg_idx = 0; | |
104 | struct scu_sgl_element_pair *scu_sg = NULL; | |
105 | struct scu_sgl_element_pair *prev_sg = NULL; | |
106 | ||
107 | if (task->num_scatter > 0) { | |
108 | sg = task->scatter; | |
109 | ||
110 | while (sg) { | |
111 | scu_sg = scic_sds_request_get_sgl_element_pair( | |
112 | sds_request, | |
113 | sg_idx); | |
114 | ||
115 | SCU_SGL_COPY(scu_sg->A, sg); | |
116 | ||
117 | sg = sg_next(sg); | |
118 | ||
119 | if (sg) { | |
120 | SCU_SGL_COPY(scu_sg->B, sg); | |
121 | sg = sg_next(sg); | |
122 | } else | |
123 | SCU_SGL_ZERO(scu_sg->B); | |
124 | ||
125 | if (prev_sg) { | |
126 | dma_addr = | |
127 | scic_io_request_get_dma_addr( | |
128 | sds_request, | |
129 | scu_sg); | |
130 | ||
131 | prev_sg->next_pair_upper = | |
132 | upper_32_bits(dma_addr); | |
133 | prev_sg->next_pair_lower = | |
134 | lower_32_bits(dma_addr); | |
135 | } | |
136 | ||
137 | prev_sg = scu_sg; | |
138 | sg_idx++; | |
139 | } | |
140 | } else { /* handle when no sg */ | |
141 | scu_sg = scic_sds_request_get_sgl_element_pair(sds_request, | |
142 | sg_idx); | |
6f231dda | 143 | |
f1f52e75 DW |
144 | dma_addr = dma_map_single(&isci_host->pdev->dev, |
145 | task->scatter, | |
146 | task->total_xfer_len, | |
147 | task->data_dir); | |
6f231dda | 148 | |
f1f52e75 | 149 | isci_request->zero_scatter_daddr = dma_addr; |
6f231dda | 150 | |
f1f52e75 DW |
151 | scu_sg->A.length = task->total_xfer_len; |
152 | scu_sg->A.address_upper = upper_32_bits(dma_addr); | |
153 | scu_sg->A.address_lower = lower_32_bits(dma_addr); | |
154 | } | |
6f231dda | 155 | |
f1f52e75 DW |
156 | if (scu_sg) { |
157 | scu_sg->next_pair_upper = 0; | |
158 | scu_sg->next_pair_lower = 0; | |
6f231dda | 159 | } |
f1f52e75 | 160 | } |
6f231dda | 161 | |
f1f52e75 DW |
162 | static void scic_sds_ssp_io_request_assign_buffers(struct scic_sds_request *sci_req) |
163 | { | |
164 | if (sci_req->was_tag_assigned_by_user == false) | |
165 | sci_req->task_context_buffer = &sci_req->tc; | |
6f231dda DW |
166 | } |
167 | ||
f1f52e75 | 168 | static void scic_sds_io_request_build_ssp_command_iu(struct scic_sds_request *sci_req) |
6f231dda | 169 | { |
f1f52e75 DW |
170 | struct ssp_cmd_iu *cmd_iu; |
171 | struct isci_request *ireq = sci_req_to_ireq(sci_req); | |
2ec53eb4 | 172 | struct sas_task *task = isci_request_access_task(ireq); |
6f231dda | 173 | |
f1f52e75 | 174 | cmd_iu = &sci_req->ssp.cmd; |
6f231dda | 175 | |
f1f52e75 DW |
176 | memcpy(cmd_iu->LUN, task->ssp_task.LUN, 8); |
177 | cmd_iu->add_cdb_len = 0; | |
178 | cmd_iu->_r_a = 0; | |
179 | cmd_iu->_r_b = 0; | |
180 | cmd_iu->en_fburst = 0; /* unsupported */ | |
181 | cmd_iu->task_prio = task->ssp_task.task_prio; | |
182 | cmd_iu->task_attr = task->ssp_task.task_attr; | |
183 | cmd_iu->_r_c = 0; | |
6f231dda | 184 | |
f1f52e75 DW |
185 | sci_swab32_cpy(&cmd_iu->cdb, task->ssp_task.cdb, |
186 | sizeof(task->ssp_task.cdb) / sizeof(u32)); | |
187 | } | |
6f231dda | 188 | |
f1f52e75 DW |
189 | static void scic_sds_task_request_build_ssp_task_iu(struct scic_sds_request *sci_req) |
190 | { | |
191 | struct ssp_task_iu *task_iu; | |
192 | struct isci_request *ireq = sci_req_to_ireq(sci_req); | |
193 | struct sas_task *task = isci_request_access_task(ireq); | |
194 | struct isci_tmf *isci_tmf = isci_request_access_tmf(ireq); | |
6f231dda | 195 | |
f1f52e75 DW |
196 | task_iu = &sci_req->ssp.tmf; |
197 | ||
198 | memset(task_iu, 0, sizeof(struct ssp_task_iu)); | |
199 | ||
200 | memcpy(task_iu->LUN, task->ssp_task.LUN, 8); | |
201 | ||
202 | task_iu->task_func = isci_tmf->tmf_code; | |
203 | task_iu->task_tag = | |
204 | (ireq->ttype == tmf_task) ? | |
205 | isci_tmf->io_tag : | |
206 | SCI_CONTROLLER_INVALID_IO_TAG; | |
6f231dda DW |
207 | } |
208 | ||
209 | /** | |
f1f52e75 DW |
210 | * This method is will fill in the SCU Task Context for any type of SSP request. |
211 | * @sci_req: | |
212 | * @task_context: | |
6f231dda | 213 | * |
6f231dda | 214 | */ |
f1f52e75 DW |
215 | static void scu_ssp_reqeust_construct_task_context( |
216 | struct scic_sds_request *sds_request, | |
217 | struct scu_task_context *task_context) | |
6f231dda | 218 | { |
f1f52e75 DW |
219 | dma_addr_t dma_addr; |
220 | struct scic_sds_controller *controller; | |
221 | struct scic_sds_remote_device *target_device; | |
222 | struct scic_sds_port *target_port; | |
223 | ||
224 | controller = scic_sds_request_get_controller(sds_request); | |
225 | target_device = scic_sds_request_get_device(sds_request); | |
226 | target_port = scic_sds_request_get_port(sds_request); | |
227 | ||
228 | /* Fill in the TC with the its required data */ | |
229 | task_context->abort = 0; | |
230 | task_context->priority = 0; | |
231 | task_context->initiator_request = 1; | |
232 | task_context->connection_rate = target_device->connection_rate; | |
233 | task_context->protocol_engine_index = | |
234 | scic_sds_controller_get_protocol_engine_group(controller); | |
235 | task_context->logical_port_index = | |
236 | scic_sds_port_get_index(target_port); | |
237 | task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP; | |
238 | task_context->valid = SCU_TASK_CONTEXT_VALID; | |
239 | task_context->context_type = SCU_TASK_CONTEXT_TYPE; | |
240 | ||
241 | task_context->remote_node_index = | |
242 | scic_sds_remote_device_get_index(sds_request->target_device); | |
243 | task_context->command_code = 0; | |
244 | ||
245 | task_context->link_layer_control = 0; | |
246 | task_context->do_not_dma_ssp_good_response = 1; | |
247 | task_context->strict_ordering = 0; | |
248 | task_context->control_frame = 0; | |
249 | task_context->timeout_enable = 0; | |
250 | task_context->block_guard_enable = 0; | |
251 | ||
252 | task_context->address_modifier = 0; | |
253 | ||
254 | /* task_context->type.ssp.tag = sci_req->io_tag; */ | |
255 | task_context->task_phase = 0x01; | |
256 | ||
257 | if (sds_request->was_tag_assigned_by_user) { | |
258 | /* | |
259 | * Build the task context now since we have already read | |
260 | * the data | |
261 | */ | |
262 | sds_request->post_context = | |
263 | (SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC | | |
264 | (scic_sds_controller_get_protocol_engine_group( | |
265 | controller) << | |
266 | SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) | | |
267 | (scic_sds_port_get_index(target_port) << | |
268 | SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) | | |
269 | scic_sds_io_tag_get_index(sds_request->io_tag)); | |
270 | } else { | |
271 | /* | |
272 | * Build the task context now since we have already read | |
273 | * the data | |
274 | * | |
275 | * I/O tag index is not assigned because we have to wait | |
276 | * until we get a TCi | |
277 | */ | |
278 | sds_request->post_context = | |
279 | (SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC | | |
280 | (scic_sds_controller_get_protocol_engine_group( | |
281 | owning_controller) << | |
282 | SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) | | |
283 | (scic_sds_port_get_index(target_port) << | |
284 | SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT)); | |
285 | } | |
6f231dda | 286 | |
f1f52e75 DW |
287 | /* |
288 | * Copy the physical address for the command buffer to the | |
289 | * SCU Task Context | |
290 | */ | |
291 | dma_addr = scic_io_request_get_dma_addr(sds_request, | |
292 | &sds_request->ssp.cmd); | |
6f231dda | 293 | |
f1f52e75 DW |
294 | task_context->command_iu_upper = upper_32_bits(dma_addr); |
295 | task_context->command_iu_lower = lower_32_bits(dma_addr); | |
296 | ||
297 | /* | |
298 | * Copy the physical address for the response buffer to the | |
299 | * SCU Task Context | |
6f231dda | 300 | */ |
f1f52e75 DW |
301 | dma_addr = scic_io_request_get_dma_addr(sds_request, |
302 | &sds_request->ssp.rsp); | |
6f231dda | 303 | |
f1f52e75 DW |
304 | task_context->response_iu_upper = upper_32_bits(dma_addr); |
305 | task_context->response_iu_lower = lower_32_bits(dma_addr); | |
306 | } | |
6f231dda | 307 | |
f1f52e75 DW |
308 | /** |
309 | * This method is will fill in the SCU Task Context for a SSP IO request. | |
310 | * @sci_req: | |
311 | * | |
312 | */ | |
313 | static void scu_ssp_io_request_construct_task_context( | |
314 | struct scic_sds_request *sci_req, | |
315 | enum dma_data_direction dir, | |
316 | u32 len) | |
317 | { | |
318 | struct scu_task_context *task_context; | |
6f231dda | 319 | |
f1f52e75 | 320 | task_context = scic_sds_request_get_task_context(sci_req); |
6f231dda | 321 | |
f1f52e75 | 322 | scu_ssp_reqeust_construct_task_context(sci_req, task_context); |
6f231dda | 323 | |
f1f52e75 DW |
324 | task_context->ssp_command_iu_length = |
325 | sizeof(struct ssp_cmd_iu) / sizeof(u32); | |
326 | task_context->type.ssp.frame_type = SSP_COMMAND; | |
327 | ||
328 | switch (dir) { | |
329 | case DMA_FROM_DEVICE: | |
330 | case DMA_NONE: | |
331 | default: | |
332 | task_context->task_type = SCU_TASK_TYPE_IOREAD; | |
a1a113b0 | 333 | break; |
f1f52e75 DW |
334 | case DMA_TO_DEVICE: |
335 | task_context->task_type = SCU_TASK_TYPE_IOWRITE; | |
a1a113b0 | 336 | break; |
6f231dda DW |
337 | } |
338 | ||
f1f52e75 DW |
339 | task_context->transfer_length_bytes = len; |
340 | ||
341 | if (task_context->transfer_length_bytes > 0) | |
342 | scic_sds_request_build_sgl(sci_req); | |
6f231dda DW |
343 | } |
344 | ||
f1f52e75 DW |
345 | static void scic_sds_ssp_task_request_assign_buffers(struct scic_sds_request *sci_req) |
346 | { | |
347 | if (sci_req->was_tag_assigned_by_user == false) | |
348 | sci_req->task_context_buffer = &sci_req->tc; | |
349 | } | |
6f231dda DW |
350 | |
351 | /** | |
f1f52e75 DW |
352 | * This method will fill in the SCU Task Context for a SSP Task request. The |
353 | * following important settings are utilized: -# priority == | |
354 | * SCU_TASK_PRIORITY_HIGH. This ensures that the task request is issued | |
355 | * ahead of other task destined for the same Remote Node. -# task_type == | |
356 | * SCU_TASK_TYPE_IOREAD. This simply indicates that a normal request type | |
357 | * (i.e. non-raw frame) is being utilized to perform task management. -# | |
358 | * control_frame == 1. This ensures that the proper endianess is set so | |
359 | * that the bytes are transmitted in the right order for a task frame. | |
360 | * @sci_req: This parameter specifies the task request object being | |
361 | * constructed. | |
6f231dda | 362 | * |
6f231dda | 363 | */ |
f1f52e75 DW |
364 | static void scu_ssp_task_request_construct_task_context( |
365 | struct scic_sds_request *sci_req) | |
6f231dda | 366 | { |
f1f52e75 | 367 | struct scu_task_context *task_context; |
6f231dda | 368 | |
f1f52e75 | 369 | task_context = scic_sds_request_get_task_context(sci_req); |
6f231dda | 370 | |
f1f52e75 | 371 | scu_ssp_reqeust_construct_task_context(sci_req, task_context); |
6f231dda | 372 | |
f1f52e75 DW |
373 | task_context->control_frame = 1; |
374 | task_context->priority = SCU_TASK_PRIORITY_HIGH; | |
375 | task_context->task_type = SCU_TASK_TYPE_RAW_FRAME; | |
376 | task_context->transfer_length_bytes = 0; | |
377 | task_context->type.ssp.frame_type = SSP_TASK; | |
378 | task_context->ssp_command_iu_length = | |
379 | sizeof(struct ssp_task_iu) / sizeof(u32); | |
6f231dda DW |
380 | } |
381 | ||
6f231dda | 382 | |
f1f52e75 DW |
383 | /** |
384 | * This method constructs the SSP Command IU data for this ssp passthrough | |
385 | * comand request object. | |
386 | * @sci_req: This parameter specifies the request object for which the SSP | |
387 | * command information unit is being built. | |
388 | * | |
389 | * enum sci_status, returns invalid parameter is cdb > 16 | |
390 | */ | |
6f231dda | 391 | |
6f231dda DW |
392 | |
393 | /** | |
f1f52e75 DW |
394 | * This method constructs the SATA request object. |
395 | * @sci_req: | |
396 | * @sat_protocol: | |
397 | * @transfer_length: | |
398 | * @data_direction: | |
399 | * @copy_rx_frame: | |
6f231dda | 400 | * |
f1f52e75 | 401 | * enum sci_status |
6f231dda | 402 | */ |
f1f52e75 DW |
403 | static enum sci_status |
404 | scic_io_request_construct_sata(struct scic_sds_request *sci_req, | |
405 | u32 len, | |
406 | enum dma_data_direction dir, | |
407 | bool copy) | |
6f231dda | 408 | { |
f1f52e75 DW |
409 | enum sci_status status = SCI_SUCCESS; |
410 | struct isci_request *ireq = sci_req_to_ireq(sci_req); | |
411 | struct sas_task *task = isci_request_access_task(ireq); | |
6f231dda | 412 | |
f1f52e75 DW |
413 | /* check for management protocols */ |
414 | if (ireq->ttype == tmf_task) { | |
415 | struct isci_tmf *tmf = isci_request_access_tmf(ireq); | |
6f231dda | 416 | |
f1f52e75 DW |
417 | if (tmf->tmf_code == isci_tmf_sata_srst_high || |
418 | tmf->tmf_code == isci_tmf_sata_srst_low) | |
419 | return scic_sds_stp_soft_reset_request_construct(sci_req); | |
420 | else { | |
421 | dev_err(scic_to_dev(sci_req->owning_controller), | |
422 | "%s: Request 0x%p received un-handled SAT " | |
423 | "management protocol 0x%x.\n", | |
424 | __func__, sci_req, tmf->tmf_code); | |
425 | ||
426 | return SCI_FAILURE; | |
427 | } | |
6f231dda | 428 | } |
6f231dda | 429 | |
f1f52e75 DW |
430 | if (!sas_protocol_ata(task->task_proto)) { |
431 | dev_err(scic_to_dev(sci_req->owning_controller), | |
432 | "%s: Non-ATA protocol in SATA path: 0x%x\n", | |
433 | __func__, | |
434 | task->task_proto); | |
435 | return SCI_FAILURE; | |
436 | ||
437 | } | |
438 | ||
439 | /* non data */ | |
440 | if (task->data_dir == DMA_NONE) | |
441 | return scic_sds_stp_non_data_request_construct(sci_req); | |
442 | ||
443 | /* NCQ */ | |
444 | if (task->ata_task.use_ncq) | |
445 | return scic_sds_stp_ncq_request_construct(sci_req, len, dir); | |
446 | ||
447 | /* DMA */ | |
448 | if (task->ata_task.dma_xfer) | |
449 | return scic_sds_stp_udma_request_construct(sci_req, len, dir); | |
450 | else /* PIO */ | |
451 | return scic_sds_stp_pio_request_construct(sci_req, copy); | |
452 | ||
453 | return status; | |
454 | } | |
455 | ||
456 | static enum sci_status scic_io_request_construct_basic_ssp(struct scic_sds_request *sci_req) | |
6f231dda | 457 | { |
f1f52e75 DW |
458 | struct isci_request *ireq = sci_req_to_ireq(sci_req); |
459 | struct sas_task *task = isci_request_access_task(ireq); | |
6f231dda | 460 | |
f1f52e75 | 461 | sci_req->protocol = SCIC_SSP_PROTOCOL; |
6f231dda | 462 | |
f1f52e75 DW |
463 | scu_ssp_io_request_construct_task_context(sci_req, |
464 | task->data_dir, | |
465 | task->total_xfer_len); | |
6f231dda | 466 | |
f1f52e75 | 467 | scic_sds_io_request_build_ssp_command_iu(sci_req); |
6f231dda | 468 | |
f1f52e75 DW |
469 | sci_base_state_machine_change_state( |
470 | &sci_req->state_machine, | |
471 | SCI_BASE_REQUEST_STATE_CONSTRUCTED); | |
ce4f75de | 472 | |
f1f52e75 DW |
473 | return SCI_SUCCESS; |
474 | } | |
6f231dda | 475 | |
f1f52e75 DW |
476 | enum sci_status scic_task_request_construct_ssp( |
477 | struct scic_sds_request *sci_req) | |
478 | { | |
479 | /* Construct the SSP Task SCU Task Context */ | |
480 | scu_ssp_task_request_construct_task_context(sci_req); | |
6f231dda | 481 | |
f1f52e75 DW |
482 | /* Fill in the SSP Task IU */ |
483 | scic_sds_task_request_build_ssp_task_iu(sci_req); | |
c4b9e24c | 484 | |
f1f52e75 DW |
485 | sci_base_state_machine_change_state(&sci_req->state_machine, |
486 | SCI_BASE_REQUEST_STATE_CONSTRUCTED); | |
67ea838d | 487 | |
f1f52e75 DW |
488 | return SCI_SUCCESS; |
489 | } | |
67ea838d | 490 | |
67ea838d | 491 | |
f1f52e75 DW |
492 | static enum sci_status scic_io_request_construct_basic_sata(struct scic_sds_request *sci_req) |
493 | { | |
494 | enum sci_status status; | |
495 | struct scic_sds_stp_request *stp_req; | |
496 | bool copy = false; | |
497 | struct isci_request *isci_request = sci_req_to_ireq(sci_req); | |
498 | struct sas_task *task = isci_request_access_task(isci_request); | |
6f231dda | 499 | |
f1f52e75 DW |
500 | stp_req = &sci_req->stp.req; |
501 | sci_req->protocol = SCIC_STP_PROTOCOL; | |
6f231dda | 502 | |
f1f52e75 DW |
503 | copy = (task->data_dir == DMA_NONE) ? false : true; |
504 | ||
505 | status = scic_io_request_construct_sata(sci_req, | |
506 | task->total_xfer_len, | |
507 | task->data_dir, | |
508 | copy); | |
509 | ||
510 | if (status == SCI_SUCCESS) | |
511 | sci_base_state_machine_change_state(&sci_req->state_machine, | |
512 | SCI_BASE_REQUEST_STATE_CONSTRUCTED); | |
513 | ||
514 | return status; | |
6f231dda DW |
515 | } |
516 | ||
517 | ||
f1f52e75 DW |
518 | enum sci_status scic_task_request_construct_sata(struct scic_sds_request *sci_req) |
519 | { | |
520 | enum sci_status status = SCI_SUCCESS; | |
521 | struct isci_request *ireq = sci_req_to_ireq(sci_req); | |
522 | ||
523 | /* check for management protocols */ | |
524 | if (ireq->ttype == tmf_task) { | |
525 | struct isci_tmf *tmf = isci_request_access_tmf(ireq); | |
526 | ||
527 | if (tmf->tmf_code == isci_tmf_sata_srst_high || | |
528 | tmf->tmf_code == isci_tmf_sata_srst_low) { | |
529 | status = scic_sds_stp_soft_reset_request_construct(sci_req); | |
530 | } else { | |
531 | dev_err(scic_to_dev(sci_req->owning_controller), | |
532 | "%s: Request 0x%p received un-handled SAT " | |
533 | "Protocol 0x%x.\n", | |
534 | __func__, sci_req, tmf->tmf_code); | |
535 | ||
536 | return SCI_FAILURE; | |
537 | } | |
538 | } | |
539 | ||
540 | if (status == SCI_SUCCESS) | |
541 | sci_base_state_machine_change_state( | |
542 | &sci_req->state_machine, | |
543 | SCI_BASE_REQUEST_STATE_CONSTRUCTED); | |
544 | ||
545 | return status; | |
546 | } | |
547 | ||
6f231dda | 548 | /** |
f1f52e75 DW |
549 | * sci_req_tx_bytes - bytes transferred when reply underruns request |
550 | * @sci_req: request that was terminated early | |
6f231dda | 551 | */ |
f1f52e75 DW |
552 | #define SCU_TASK_CONTEXT_SRAM 0x200000 |
553 | static u32 sci_req_tx_bytes(struct scic_sds_request *sci_req) | |
6f231dda | 554 | { |
f1f52e75 DW |
555 | struct scic_sds_controller *scic = sci_req->owning_controller; |
556 | u32 ret_val = 0; | |
557 | ||
558 | if (readl(&scic->smu_registers->address_modifier) == 0) { | |
559 | void __iomem *scu_reg_base = scic->scu_registers; | |
560 | ||
561 | /* get the bytes of data from the Address == BAR1 + 20002Ch + (256*TCi) where | |
562 | * BAR1 is the scu_registers | |
563 | * 0x20002C = 0x200000 + 0x2c | |
564 | * = start of task context SRAM + offset of (type.ssp.data_offset) | |
565 | * TCi is the io_tag of struct scic_sds_request | |
566 | */ | |
567 | ret_val = readl(scu_reg_base + | |
568 | (SCU_TASK_CONTEXT_SRAM + offsetof(struct scu_task_context, type.ssp.data_offset)) + | |
569 | ((sizeof(struct scu_task_context)) * scic_sds_io_tag_get_index(sci_req->io_tag))); | |
570 | } | |
571 | ||
572 | return ret_val; | |
573 | } | |
574 | ||
575 | enum sci_status | |
576 | scic_sds_request_start(struct scic_sds_request *request) | |
577 | { | |
578 | if (request->device_sequence != | |
579 | scic_sds_remote_device_get_sequence(request->target_device)) | |
580 | return SCI_FAILURE; | |
581 | ||
582 | if (request->state_handlers->start_handler) | |
583 | return request->state_handlers->start_handler(request); | |
584 | ||
585 | dev_warn(scic_to_dev(request->owning_controller), | |
586 | "%s: SCIC IO Request requested to start while in wrong " | |
587 | "state %d\n", | |
588 | __func__, | |
589 | sci_base_state_machine_get_state(&request->state_machine)); | |
590 | ||
591 | return SCI_FAILURE_INVALID_STATE; | |
592 | } | |
593 | ||
594 | enum sci_status | |
595 | scic_sds_io_request_terminate(struct scic_sds_request *request) | |
596 | { | |
597 | if (request->state_handlers->abort_handler) | |
598 | return request->state_handlers->abort_handler(request); | |
599 | ||
600 | dev_warn(scic_to_dev(request->owning_controller), | |
601 | "%s: SCIC IO Request requested to abort while in wrong " | |
602 | "state %d\n", | |
6f231dda | 603 | __func__, |
f1f52e75 | 604 | sci_base_state_machine_get_state(&request->state_machine)); |
6f231dda | 605 | |
f1f52e75 DW |
606 | return SCI_FAILURE_INVALID_STATE; |
607 | } | |
6f231dda | 608 | |
f1f52e75 DW |
609 | enum sci_status scic_sds_io_request_event_handler( |
610 | struct scic_sds_request *request, | |
611 | u32 event_code) | |
612 | { | |
613 | if (request->state_handlers->event_handler) | |
614 | return request->state_handlers->event_handler(request, event_code); | |
615 | ||
616 | dev_warn(scic_to_dev(request->owning_controller), | |
617 | "%s: SCIC IO Request given event code notification %x while " | |
618 | "in wrong state %d\n", | |
619 | __func__, | |
620 | event_code, | |
621 | sci_base_state_machine_get_state(&request->state_machine)); | |
622 | ||
623 | return SCI_FAILURE_INVALID_STATE; | |
6f231dda DW |
624 | } |
625 | ||
626 | /** | |
6f231dda | 627 | * |
f1f52e75 DW |
628 | * @sci_req: The SCIC_SDS_IO_REQUEST_T object for which the start |
629 | * operation is to be executed. | |
630 | * @frame_index: The frame index returned by the hardware for the reqeust | |
631 | * object. | |
632 | * | |
633 | * This method invokes the core state frame handler for the | |
634 | * SCIC_SDS_IO_REQUEST_T object. enum sci_status | |
6f231dda | 635 | */ |
f1f52e75 DW |
636 | enum sci_status scic_sds_io_request_frame_handler( |
637 | struct scic_sds_request *request, | |
638 | u32 frame_index) | |
6f231dda | 639 | { |
f1f52e75 DW |
640 | if (request->state_handlers->frame_handler) |
641 | return request->state_handlers->frame_handler(request, frame_index); | |
642 | ||
643 | dev_warn(scic_to_dev(request->owning_controller), | |
644 | "%s: SCIC IO Request given unexpected frame %x while in " | |
645 | "state %d\n", | |
646 | __func__, | |
647 | frame_index, | |
648 | sci_base_state_machine_get_state(&request->state_machine)); | |
649 | ||
650 | scic_sds_controller_release_frame(request->owning_controller, frame_index); | |
651 | return SCI_FAILURE_INVALID_STATE; | |
6f231dda DW |
652 | } |
653 | ||
f1f52e75 DW |
654 | /* |
655 | * This function copies response data for requests returning response data | |
656 | * instead of sense data. | |
657 | * @sci_req: This parameter specifies the request object for which to copy | |
658 | * the response data. | |
6f231dda | 659 | */ |
f1f52e75 | 660 | void scic_sds_io_request_copy_response(struct scic_sds_request *sci_req) |
6f231dda | 661 | { |
f1f52e75 DW |
662 | void *resp_buf; |
663 | u32 len; | |
664 | struct ssp_response_iu *ssp_response; | |
665 | struct isci_request *ireq = sci_req_to_ireq(sci_req); | |
666 | struct isci_tmf *isci_tmf = isci_request_access_tmf(ireq); | |
6f231dda | 667 | |
f1f52e75 | 668 | ssp_response = &sci_req->ssp.rsp; |
6f231dda | 669 | |
f1f52e75 | 670 | resp_buf = &isci_tmf->resp.resp_iu; |
6f231dda | 671 | |
f1f52e75 DW |
672 | len = min_t(u32, |
673 | SSP_RESP_IU_MAX_SIZE, | |
674 | be32_to_cpu(ssp_response->response_data_len)); | |
6f231dda | 675 | |
f1f52e75 DW |
676 | memcpy(resp_buf, ssp_response->resp_data, len); |
677 | } | |
6f231dda | 678 | |
f1f52e75 DW |
679 | /* |
680 | * This method implements the action taken when a constructed | |
681 | * SCIC_SDS_IO_REQUEST_T object receives a scic_sds_request_start() request. | |
682 | * This method will, if necessary, allocate a TCi for the io request object and | |
683 | * then will, if necessary, copy the constructed TC data into the actual TC | |
684 | * buffer. If everything is successful the post context field is updated with | |
685 | * the TCi so the controller can post the request to the hardware. enum sci_status | |
686 | * SCI_SUCCESS SCI_FAILURE_INSUFFICIENT_RESOURCES | |
687 | */ | |
688 | static enum sci_status scic_sds_request_constructed_state_start_handler( | |
689 | struct scic_sds_request *request) | |
690 | { | |
691 | struct scu_task_context *task_context; | |
6f231dda | 692 | |
f1f52e75 DW |
693 | if (request->io_tag == SCI_CONTROLLER_INVALID_IO_TAG) { |
694 | request->io_tag = | |
695 | scic_controller_allocate_io_tag(request->owning_controller); | |
696 | } | |
6f231dda | 697 | |
f1f52e75 DW |
698 | /* Record the IO Tag in the request */ |
699 | if (request->io_tag != SCI_CONTROLLER_INVALID_IO_TAG) { | |
700 | task_context = request->task_context_buffer; | |
6f231dda | 701 | |
f1f52e75 | 702 | task_context->task_index = scic_sds_io_tag_get_index(request->io_tag); |
6f231dda | 703 | |
f1f52e75 DW |
704 | switch (task_context->protocol_type) { |
705 | case SCU_TASK_CONTEXT_PROTOCOL_SMP: | |
706 | case SCU_TASK_CONTEXT_PROTOCOL_SSP: | |
707 | /* SSP/SMP Frame */ | |
708 | task_context->type.ssp.tag = request->io_tag; | |
709 | task_context->type.ssp.target_port_transfer_tag = 0xFFFF; | |
710 | break; | |
6f231dda | 711 | |
f1f52e75 DW |
712 | case SCU_TASK_CONTEXT_PROTOCOL_STP: |
713 | /* | |
714 | * STP/SATA Frame | |
715 | * task_context->type.stp.ncq_tag = request->ncq_tag; */ | |
716 | break; | |
6f231dda | 717 | |
f1f52e75 DW |
718 | case SCU_TASK_CONTEXT_PROTOCOL_NONE: |
719 | /* / @todo When do we set no protocol type? */ | |
720 | break; | |
6f231dda | 721 | |
f1f52e75 DW |
722 | default: |
723 | /* This should never happen since we build the IO requests */ | |
724 | break; | |
725 | } | |
6f231dda | 726 | |
f1f52e75 DW |
727 | /* |
728 | * Check to see if we need to copy the task context buffer | |
729 | * or have been building into the task context buffer */ | |
730 | if (request->was_tag_assigned_by_user == false) { | |
731 | scic_sds_controller_copy_task_context( | |
732 | request->owning_controller, request); | |
733 | } | |
6f231dda | 734 | |
f1f52e75 DW |
735 | /* Add to the post_context the io tag value */ |
736 | request->post_context |= scic_sds_io_tag_get_index(request->io_tag); | |
6f231dda | 737 | |
f1f52e75 DW |
738 | /* Everything is good go ahead and change state */ |
739 | sci_base_state_machine_change_state(&request->state_machine, | |
740 | SCI_BASE_REQUEST_STATE_STARTED); | |
6f231dda | 741 | |
f1f52e75 DW |
742 | return SCI_SUCCESS; |
743 | } | |
6f231dda | 744 | |
f1f52e75 DW |
745 | return SCI_FAILURE_INSUFFICIENT_RESOURCES; |
746 | } | |
6f231dda | 747 | |
f1f52e75 DW |
748 | /* |
749 | * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T | |
750 | * object receives a scic_sds_request_terminate() request. Since the request | |
751 | * has not yet been posted to the hardware the request transitions to the | |
752 | * completed state. enum sci_status SCI_SUCCESS | |
753 | */ | |
754 | static enum sci_status scic_sds_request_constructed_state_abort_handler( | |
755 | struct scic_sds_request *request) | |
756 | { | |
757 | /* | |
758 | * This request has been terminated by the user make sure that the correct | |
759 | * status code is returned */ | |
760 | scic_sds_request_set_status(request, | |
761 | SCU_TASK_DONE_TASK_ABORT, | |
762 | SCI_FAILURE_IO_TERMINATED); | |
763 | ||
764 | sci_base_state_machine_change_state(&request->state_machine, | |
765 | SCI_BASE_REQUEST_STATE_COMPLETED); | |
766 | return SCI_SUCCESS; | |
767 | } | |
6f231dda | 768 | |
f1f52e75 DW |
769 | /* |
770 | * ***************************************************************************** | |
771 | * * STARTED STATE HANDLERS | |
772 | * ***************************************************************************** */ | |
6f231dda | 773 | |
f1f52e75 DW |
774 | /* |
775 | * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T | |
776 | * object receives a scic_sds_request_terminate() request. Since the request | |
777 | * has been posted to the hardware the io request state is changed to the | |
778 | * aborting state. enum sci_status SCI_SUCCESS | |
779 | */ | |
780 | enum sci_status scic_sds_request_started_state_abort_handler( | |
781 | struct scic_sds_request *request) | |
782 | { | |
783 | if (request->has_started_substate_machine) | |
784 | sci_base_state_machine_stop(&request->started_substate_machine); | |
6f231dda | 785 | |
f1f52e75 DW |
786 | sci_base_state_machine_change_state(&request->state_machine, |
787 | SCI_BASE_REQUEST_STATE_ABORTING); | |
788 | return SCI_SUCCESS; | |
789 | } | |
6f231dda | 790 | |
f1f52e75 DW |
791 | /* |
792 | * scic_sds_request_started_state_tc_completion_handler() - This method process | |
793 | * TC (task context) completions for normal IO request (i.e. Task/Abort | |
794 | * Completions of type 0). This method will update the | |
795 | * SCIC_SDS_IO_REQUEST_T::status field. | |
796 | * @sci_req: This parameter specifies the request for which a completion | |
797 | * occurred. | |
798 | * @completion_code: This parameter specifies the completion code received from | |
799 | * the SCU. | |
800 | * | |
801 | */ | |
802 | static enum sci_status | |
803 | scic_sds_request_started_state_tc_completion_handler(struct scic_sds_request *sci_req, | |
804 | u32 completion_code) | |
805 | { | |
806 | u8 datapres; | |
807 | struct ssp_response_iu *resp_iu; | |
6f231dda | 808 | |
f1f52e75 DW |
809 | /* |
810 | * TODO: Any SDMA return code of other than 0 is bad | |
811 | * decode 0x003C0000 to determine SDMA status | |
812 | */ | |
813 | switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { | |
814 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD): | |
815 | scic_sds_request_set_status(sci_req, | |
816 | SCU_TASK_DONE_GOOD, | |
817 | SCI_SUCCESS); | |
6f231dda DW |
818 | break; |
819 | ||
f1f52e75 DW |
820 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_EARLY_RESP): |
821 | { | |
822 | /* | |
823 | * There are times when the SCU hardware will return an early | |
824 | * response because the io request specified more data than is | |
825 | * returned by the target device (mode pages, inquiry data, | |
826 | * etc.). We must check the response stats to see if this is | |
827 | * truly a failed request or a good request that just got | |
828 | * completed early. | |
829 | */ | |
830 | struct ssp_response_iu *resp = &sci_req->ssp.rsp; | |
831 | ssize_t word_cnt = SSP_RESP_IU_MAX_SIZE / sizeof(u32); | |
832 | ||
833 | sci_swab32_cpy(&sci_req->ssp.rsp, | |
834 | &sci_req->ssp.rsp, | |
835 | word_cnt); | |
836 | ||
837 | if (resp->status == 0) { | |
838 | scic_sds_request_set_status( | |
839 | sci_req, | |
840 | SCU_TASK_DONE_GOOD, | |
841 | SCI_SUCCESS_IO_DONE_EARLY); | |
842 | } else { | |
843 | scic_sds_request_set_status( | |
844 | sci_req, | |
845 | SCU_TASK_DONE_CHECK_RESPONSE, | |
846 | SCI_FAILURE_IO_RESPONSE_VALID); | |
847 | } | |
848 | } | |
849 | break; | |
6f231dda | 850 | |
f1f52e75 DW |
851 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_CHECK_RESPONSE): |
852 | { | |
853 | ssize_t word_cnt = SSP_RESP_IU_MAX_SIZE / sizeof(u32); | |
6f231dda | 854 | |
f1f52e75 DW |
855 | sci_swab32_cpy(&sci_req->ssp.rsp, |
856 | &sci_req->ssp.rsp, | |
857 | word_cnt); | |
6f231dda | 858 | |
f1f52e75 DW |
859 | scic_sds_request_set_status(sci_req, |
860 | SCU_TASK_DONE_CHECK_RESPONSE, | |
861 | SCI_FAILURE_IO_RESPONSE_VALID); | |
6f231dda | 862 | break; |
f1f52e75 | 863 | } |
6f231dda | 864 | |
f1f52e75 DW |
865 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_RESP_LEN_ERR): |
866 | /* | |
867 | * / @todo With TASK_DONE_RESP_LEN_ERR is the response frame | |
868 | * guaranteed to be received before this completion status is | |
869 | * posted? | |
870 | */ | |
871 | resp_iu = &sci_req->ssp.rsp; | |
872 | datapres = resp_iu->datapres; | |
873 | ||
874 | if ((datapres == 0x01) || (datapres == 0x02)) { | |
875 | scic_sds_request_set_status( | |
876 | sci_req, | |
877 | SCU_TASK_DONE_CHECK_RESPONSE, | |
878 | SCI_FAILURE_IO_RESPONSE_VALID); | |
879 | } else | |
880 | scic_sds_request_set_status( | |
881 | sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS); | |
6f231dda DW |
882 | break; |
883 | ||
f1f52e75 DW |
884 | /* only stp device gets suspended. */ |
885 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_ACK_NAK_TO): | |
886 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LL_PERR): | |
887 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_NAK_ERR): | |
888 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_DATA_LEN_ERR): | |
889 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LL_ABORT_ERR): | |
890 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_XR_WD_LEN): | |
891 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_MAX_PLD_ERR): | |
892 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_RESP): | |
893 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_SDBFIS): | |
894 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_REG_ERR): | |
895 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SDB_ERR): | |
896 | if (sci_req->protocol == SCIC_STP_PROTOCOL) { | |
897 | scic_sds_request_set_status( | |
898 | sci_req, | |
899 | SCU_GET_COMPLETION_TL_STATUS(completion_code) >> | |
900 | SCU_COMPLETION_TL_STATUS_SHIFT, | |
901 | SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED); | |
902 | } else { | |
903 | scic_sds_request_set_status( | |
904 | sci_req, | |
905 | SCU_GET_COMPLETION_TL_STATUS(completion_code) >> | |
906 | SCU_COMPLETION_TL_STATUS_SHIFT, | |
907 | SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR); | |
908 | } | |
6f231dda DW |
909 | break; |
910 | ||
f1f52e75 DW |
911 | /* both stp/ssp device gets suspended */ |
912 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LF_ERR): | |
913 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_WRONG_DESTINATION): | |
914 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_1): | |
915 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_2): | |
916 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_3): | |
917 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_BAD_DESTINATION): | |
918 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_ZONE_VIOLATION): | |
919 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_STP_RESOURCES_BUSY): | |
920 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_PROTOCOL_NOT_SUPPORTED): | |
921 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_CONNECTION_RATE_NOT_SUPPORTED): | |
922 | scic_sds_request_set_status( | |
923 | sci_req, | |
924 | SCU_GET_COMPLETION_TL_STATUS(completion_code) >> | |
925 | SCU_COMPLETION_TL_STATUS_SHIFT, | |
926 | SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED); | |
6f231dda DW |
927 | break; |
928 | ||
f1f52e75 DW |
929 | /* neither ssp nor stp gets suspended. */ |
930 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_NAK_CMD_ERR): | |
931 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_XR): | |
932 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_XR_IU_LEN_ERR): | |
933 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SDMA_ERR): | |
934 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_OFFSET_ERR): | |
935 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_EXCESS_DATA): | |
936 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_RESP_TO_ERR): | |
937 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_UFI_ERR): | |
938 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_FRM_TYPE_ERR): | |
939 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_LL_RX_ERR): | |
940 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_DATA): | |
941 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_OPEN_FAIL): | |
942 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_VIIT_ENTRY_NV): | |
943 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_IIT_ENTRY_NV): | |
944 | case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_RNCNV_OUTBOUND): | |
6f231dda | 945 | default: |
f1f52e75 DW |
946 | scic_sds_request_set_status( |
947 | sci_req, | |
948 | SCU_GET_COMPLETION_TL_STATUS(completion_code) >> | |
949 | SCU_COMPLETION_TL_STATUS_SHIFT, | |
950 | SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR); | |
6f231dda DW |
951 | break; |
952 | } | |
f1f52e75 DW |
953 | |
954 | /* | |
955 | * TODO: This is probably wrong for ACK/NAK timeout conditions | |
956 | */ | |
957 | ||
958 | /* In all cases we will treat this as the completion of the IO req. */ | |
959 | sci_base_state_machine_change_state( | |
960 | &sci_req->state_machine, | |
961 | SCI_BASE_REQUEST_STATE_COMPLETED); | |
962 | return SCI_SUCCESS; | |
6f231dda DW |
963 | } |
964 | ||
f1f52e75 DW |
965 | enum sci_status |
966 | scic_sds_io_request_tc_completion(struct scic_sds_request *request, u32 completion_code) | |
6f231dda | 967 | { |
f1f52e75 DW |
968 | if (request->state_machine.current_state_id == SCI_BASE_REQUEST_STATE_STARTED && |
969 | request->has_started_substate_machine == false) | |
970 | return scic_sds_request_started_state_tc_completion_handler(request, completion_code); | |
971 | else if (request->state_handlers->tc_completion_handler) | |
972 | return request->state_handlers->tc_completion_handler(request, completion_code); | |
973 | ||
974 | dev_warn(scic_to_dev(request->owning_controller), | |
975 | "%s: SCIC IO Request given task completion notification %x " | |
976 | "while in wrong state %d\n", | |
977 | __func__, | |
978 | completion_code, | |
979 | sci_base_state_machine_get_state(&request->state_machine)); | |
6f231dda | 980 | |
f1f52e75 | 981 | return SCI_FAILURE_INVALID_STATE; |
6f231dda | 982 | |
f1f52e75 | 983 | } |
6f231dda | 984 | |
f1f52e75 DW |
985 | /* |
986 | * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T | |
987 | * object receives a scic_sds_request_frame_handler() request. This method | |
988 | * first determines the frame type received. If this is a response frame then | |
989 | * the response data is copied to the io request response buffer for processing | |
990 | * at completion time. If the frame type is not a response buffer an error is | |
991 | * logged. enum sci_status SCI_SUCCESS SCI_FAILURE_INVALID_PARAMETER_VALUE | |
992 | */ | |
993 | static enum sci_status | |
994 | scic_sds_request_started_state_frame_handler(struct scic_sds_request *sci_req, | |
995 | u32 frame_index) | |
996 | { | |
997 | enum sci_status status; | |
998 | u32 *frame_header; | |
999 | struct ssp_frame_hdr ssp_hdr; | |
1000 | ssize_t word_cnt; | |
1001 | ||
1002 | status = scic_sds_unsolicited_frame_control_get_header( | |
1003 | &(scic_sds_request_get_controller(sci_req)->uf_control), | |
1004 | frame_index, | |
1005 | (void **)&frame_header); | |
1006 | ||
1007 | word_cnt = sizeof(struct ssp_frame_hdr) / sizeof(u32); | |
1008 | sci_swab32_cpy(&ssp_hdr, frame_header, word_cnt); | |
1009 | ||
1010 | if (ssp_hdr.frame_type == SSP_RESPONSE) { | |
1011 | struct ssp_response_iu *resp_iu; | |
1012 | ssize_t word_cnt = SSP_RESP_IU_MAX_SIZE / sizeof(u32); | |
1013 | ||
1014 | status = scic_sds_unsolicited_frame_control_get_buffer( | |
1015 | &(scic_sds_request_get_controller(sci_req)->uf_control), | |
1016 | frame_index, | |
1017 | (void **)&resp_iu); | |
1018 | ||
1019 | sci_swab32_cpy(&sci_req->ssp.rsp, | |
1020 | resp_iu, word_cnt); | |
1021 | ||
1022 | resp_iu = &sci_req->ssp.rsp; | |
1023 | ||
1024 | if ((resp_iu->datapres == 0x01) || | |
1025 | (resp_iu->datapres == 0x02)) { | |
1026 | scic_sds_request_set_status( | |
1027 | sci_req, | |
1028 | SCU_TASK_DONE_CHECK_RESPONSE, | |
1029 | SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR); | |
1030 | } else | |
1031 | scic_sds_request_set_status( | |
1032 | sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS); | |
1033 | } else { | |
1034 | /* This was not a response frame why did it get forwarded? */ | |
1035 | dev_err(scic_to_dev(sci_req->owning_controller), | |
1036 | "%s: SCIC IO Request 0x%p received unexpected " | |
1037 | "frame %d type 0x%02x\n", | |
6f231dda | 1038 | __func__, |
f1f52e75 DW |
1039 | sci_req, |
1040 | frame_index, | |
1041 | ssp_hdr.frame_type); | |
1042 | } | |
ec6c9638 | 1043 | |
f1f52e75 DW |
1044 | /* |
1045 | * In any case we are done with this frame buffer return it to the | |
1046 | * controller | |
1047 | */ | |
1048 | scic_sds_controller_release_frame( | |
1049 | sci_req->owning_controller, frame_index); | |
6f231dda | 1050 | |
f1f52e75 DW |
1051 | return SCI_SUCCESS; |
1052 | } | |
a5fde225 | 1053 | |
f1f52e75 DW |
1054 | /* |
1055 | * ***************************************************************************** | |
1056 | * * COMPLETED STATE HANDLERS | |
1057 | * ***************************************************************************** */ | |
a5fde225 | 1058 | |
a5fde225 | 1059 | |
f1f52e75 DW |
1060 | /* |
1061 | * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T | |
1062 | * object receives a scic_sds_request_complete() request. This method frees up | |
1063 | * any io request resources that have been allocated and transitions the | |
1064 | * request to its final state. Consider stopping the state machine instead of | |
1065 | * transitioning to the final state? enum sci_status SCI_SUCCESS | |
1066 | */ | |
1067 | static enum sci_status scic_sds_request_completed_state_complete_handler( | |
1068 | struct scic_sds_request *request) | |
1069 | { | |
1070 | if (request->was_tag_assigned_by_user != true) { | |
1071 | scic_controller_free_io_tag( | |
1072 | request->owning_controller, request->io_tag); | |
1073 | } | |
6f231dda | 1074 | |
f1f52e75 DW |
1075 | if (request->saved_rx_frame_index != SCU_INVALID_FRAME_INDEX) { |
1076 | scic_sds_controller_release_frame( | |
1077 | request->owning_controller, request->saved_rx_frame_index); | |
1078 | } | |
6f231dda | 1079 | |
f1f52e75 DW |
1080 | sci_base_state_machine_change_state(&request->state_machine, |
1081 | SCI_BASE_REQUEST_STATE_FINAL); | |
1082 | return SCI_SUCCESS; | |
1083 | } | |
6f231dda | 1084 | |
f1f52e75 DW |
1085 | /* |
1086 | * ***************************************************************************** | |
1087 | * * ABORTING STATE HANDLERS | |
1088 | * ***************************************************************************** */ | |
1089 | ||
1090 | /* | |
1091 | * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T | |
1092 | * object receives a scic_sds_request_terminate() request. This method is the | |
1093 | * io request aborting state abort handlers. On receipt of a multiple | |
1094 | * terminate requests the io request will transition to the completed state. | |
1095 | * This should not happen in normal operation. enum sci_status SCI_SUCCESS | |
1096 | */ | |
1097 | static enum sci_status scic_sds_request_aborting_state_abort_handler( | |
1098 | struct scic_sds_request *request) | |
1099 | { | |
1100 | sci_base_state_machine_change_state(&request->state_machine, | |
1101 | SCI_BASE_REQUEST_STATE_COMPLETED); | |
1102 | return SCI_SUCCESS; | |
1103 | } | |
1104 | ||
1105 | /* | |
1106 | * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T | |
1107 | * object receives a scic_sds_request_task_completion() request. This method | |
1108 | * decodes the completion type waiting for the abort task complete | |
1109 | * notification. When the abort task complete is received the io request | |
1110 | * transitions to the completed state. enum sci_status SCI_SUCCESS | |
1111 | */ | |
1112 | static enum sci_status scic_sds_request_aborting_state_tc_completion_handler( | |
1113 | struct scic_sds_request *sci_req, | |
1114 | u32 completion_code) | |
1115 | { | |
1116 | switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) { | |
1117 | case (SCU_TASK_DONE_GOOD << SCU_COMPLETION_TL_STATUS_SHIFT): | |
1118 | case (SCU_TASK_DONE_TASK_ABORT << SCU_COMPLETION_TL_STATUS_SHIFT): | |
1119 | scic_sds_request_set_status( | |
1120 | sci_req, SCU_TASK_DONE_TASK_ABORT, SCI_FAILURE_IO_TERMINATED | |
1121 | ); | |
1122 | ||
1123 | sci_base_state_machine_change_state(&sci_req->state_machine, | |
1124 | SCI_BASE_REQUEST_STATE_COMPLETED); | |
1125 | break; | |
1126 | ||
1127 | default: | |
1128 | /* | |
1129 | * Unless we get some strange error wait for the task abort to complete | |
1130 | * TODO: Should there be a state change for this completion? */ | |
6f231dda DW |
1131 | break; |
1132 | } | |
f1f52e75 DW |
1133 | |
1134 | return SCI_SUCCESS; | |
1135 | } | |
1136 | ||
1137 | /* | |
1138 | * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T | |
1139 | * object receives a scic_sds_request_frame_handler() request. This method | |
1140 | * discards the unsolicited frame since we are waiting for the abort task | |
1141 | * completion. enum sci_status SCI_SUCCESS | |
1142 | */ | |
1143 | static enum sci_status scic_sds_request_aborting_state_frame_handler( | |
1144 | struct scic_sds_request *sci_req, | |
1145 | u32 frame_index) | |
1146 | { | |
1147 | /* TODO: Is it even possible to get an unsolicited frame in the aborting state? */ | |
1148 | ||
1149 | scic_sds_controller_release_frame( | |
1150 | sci_req->owning_controller, frame_index); | |
1151 | ||
1152 | return SCI_SUCCESS; | |
6f231dda DW |
1153 | } |
1154 | ||
f1f52e75 DW |
1155 | static const struct scic_sds_io_request_state_handler scic_sds_request_state_handler_table[] = { |
1156 | [SCI_BASE_REQUEST_STATE_INITIAL] = { | |
1157 | }, | |
1158 | [SCI_BASE_REQUEST_STATE_CONSTRUCTED] = { | |
1159 | .start_handler = scic_sds_request_constructed_state_start_handler, | |
1160 | .abort_handler = scic_sds_request_constructed_state_abort_handler, | |
1161 | }, | |
1162 | [SCI_BASE_REQUEST_STATE_STARTED] = { | |
1163 | .abort_handler = scic_sds_request_started_state_abort_handler, | |
1164 | .tc_completion_handler = scic_sds_request_started_state_tc_completion_handler, | |
1165 | .frame_handler = scic_sds_request_started_state_frame_handler, | |
1166 | }, | |
1167 | [SCI_BASE_REQUEST_STATE_COMPLETED] = { | |
1168 | .complete_handler = scic_sds_request_completed_state_complete_handler, | |
1169 | }, | |
1170 | [SCI_BASE_REQUEST_STATE_ABORTING] = { | |
1171 | .abort_handler = scic_sds_request_aborting_state_abort_handler, | |
1172 | .tc_completion_handler = scic_sds_request_aborting_state_tc_completion_handler, | |
1173 | .frame_handler = scic_sds_request_aborting_state_frame_handler, | |
1174 | }, | |
1175 | [SCI_BASE_REQUEST_STATE_FINAL] = { | |
1176 | }, | |
1177 | }; | |
1178 | ||
1179 | ||
6f231dda | 1180 | /** |
f1f52e75 DW |
1181 | * isci_request_process_response_iu() - This function sets the status and |
1182 | * response iu, in the task struct, from the request object for the upper | |
1183 | * layer driver. | |
1184 | * @sas_task: This parameter is the task struct from the upper layer driver. | |
1185 | * @resp_iu: This parameter points to the response iu of the completed request. | |
1186 | * @dev: This parameter specifies the linux device struct. | |
6f231dda DW |
1187 | * |
1188 | * none. | |
1189 | */ | |
f1f52e75 DW |
1190 | static void isci_request_process_response_iu( |
1191 | struct sas_task *task, | |
1192 | struct ssp_response_iu *resp_iu, | |
1193 | struct device *dev) | |
6f231dda | 1194 | { |
f1f52e75 DW |
1195 | dev_dbg(dev, |
1196 | "%s: resp_iu = %p " | |
1197 | "resp_iu->status = 0x%x,\nresp_iu->datapres = %d " | |
1198 | "resp_iu->response_data_len = %x, " | |
1199 | "resp_iu->sense_data_len = %x\nrepsonse data: ", | |
6f231dda | 1200 | __func__, |
f1f52e75 DW |
1201 | resp_iu, |
1202 | resp_iu->status, | |
1203 | resp_iu->datapres, | |
1204 | resp_iu->response_data_len, | |
1205 | resp_iu->sense_data_len); | |
6f231dda | 1206 | |
f1f52e75 | 1207 | task->task_status.stat = resp_iu->status; |
6f231dda | 1208 | |
f1f52e75 DW |
1209 | /* libsas updates the task status fields based on the response iu. */ |
1210 | sas_ssp_task_response(dev, task, resp_iu); | |
1211 | } | |
6f231dda | 1212 | |
f1f52e75 DW |
1213 | /** |
1214 | * isci_request_set_open_reject_status() - This function prepares the I/O | |
1215 | * completion for OPEN_REJECT conditions. | |
1216 | * @request: This parameter is the completed isci_request object. | |
1217 | * @response_ptr: This parameter specifies the service response for the I/O. | |
1218 | * @status_ptr: This parameter specifies the exec status for the I/O. | |
1219 | * @complete_to_host_ptr: This parameter specifies the action to be taken by | |
1220 | * the LLDD with respect to completing this request or forcing an abort | |
1221 | * condition on the I/O. | |
1222 | * @open_rej_reason: This parameter specifies the encoded reason for the | |
1223 | * abandon-class reject. | |
1224 | * | |
1225 | * none. | |
1226 | */ | |
1227 | static void isci_request_set_open_reject_status( | |
1228 | struct isci_request *request, | |
1229 | struct sas_task *task, | |
1230 | enum service_response *response_ptr, | |
1231 | enum exec_status *status_ptr, | |
1232 | enum isci_completion_selection *complete_to_host_ptr, | |
1233 | enum sas_open_rej_reason open_rej_reason) | |
1234 | { | |
1235 | /* Task in the target is done. */ | |
1236 | request->complete_in_target = true; | |
1237 | *response_ptr = SAS_TASK_UNDELIVERED; | |
1238 | *status_ptr = SAS_OPEN_REJECT; | |
1239 | *complete_to_host_ptr = isci_perform_normal_io_completion; | |
1240 | task->task_status.open_rej_reason = open_rej_reason; | |
1241 | } | |
6f231dda | 1242 | |
f1f52e75 DW |
1243 | /** |
1244 | * isci_request_handle_controller_specific_errors() - This function decodes | |
1245 | * controller-specific I/O completion error conditions. | |
1246 | * @request: This parameter is the completed isci_request object. | |
1247 | * @response_ptr: This parameter specifies the service response for the I/O. | |
1248 | * @status_ptr: This parameter specifies the exec status for the I/O. | |
1249 | * @complete_to_host_ptr: This parameter specifies the action to be taken by | |
1250 | * the LLDD with respect to completing this request or forcing an abort | |
1251 | * condition on the I/O. | |
1252 | * | |
1253 | * none. | |
1254 | */ | |
1255 | static void isci_request_handle_controller_specific_errors( | |
1256 | struct isci_remote_device *isci_device, | |
1257 | struct isci_request *request, | |
1258 | struct sas_task *task, | |
1259 | enum service_response *response_ptr, | |
1260 | enum exec_status *status_ptr, | |
1261 | enum isci_completion_selection *complete_to_host_ptr) | |
1262 | { | |
1263 | unsigned int cstatus; | |
6f231dda | 1264 | |
f1f52e75 | 1265 | cstatus = request->sci.scu_status; |
a5fde225 | 1266 | |
f1f52e75 DW |
1267 | dev_dbg(&request->isci_host->pdev->dev, |
1268 | "%s: %p SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR " | |
1269 | "- controller status = 0x%x\n", | |
1270 | __func__, request, cstatus); | |
6f231dda | 1271 | |
f1f52e75 DW |
1272 | /* Decode the controller-specific errors; most |
1273 | * important is to recognize those conditions in which | |
1274 | * the target may still have a task outstanding that | |
1275 | * must be aborted. | |
1276 | * | |
1277 | * Note that there are SCU completion codes being | |
1278 | * named in the decode below for which SCIC has already | |
1279 | * done work to handle them in a way other than as | |
1280 | * a controller-specific completion code; these are left | |
1281 | * in the decode below for completeness sake. | |
1282 | */ | |
1283 | switch (cstatus) { | |
1284 | case SCU_TASK_DONE_DMASETUP_DIRERR: | |
1285 | /* Also SCU_TASK_DONE_SMP_FRM_TYPE_ERR: */ | |
1286 | case SCU_TASK_DONE_XFERCNT_ERR: | |
1287 | /* Also SCU_TASK_DONE_SMP_UFI_ERR: */ | |
1288 | if (task->task_proto == SAS_PROTOCOL_SMP) { | |
1289 | /* SCU_TASK_DONE_SMP_UFI_ERR == Task Done. */ | |
1290 | *response_ptr = SAS_TASK_COMPLETE; | |
6f231dda | 1291 | |
f1f52e75 DW |
1292 | /* See if the device has been/is being stopped. Note |
1293 | * that we ignore the quiesce state, since we are | |
6f231dda DW |
1294 | * concerned about the actual device state. |
1295 | */ | |
f1f52e75 DW |
1296 | if ((isci_device->status == isci_stopping) || |
1297 | (isci_device->status == isci_stopped)) | |
1298 | *status_ptr = SAS_DEVICE_UNKNOWN; | |
1299 | else | |
1300 | *status_ptr = SAS_ABORTED_TASK; | |
6f231dda | 1301 | |
f1f52e75 | 1302 | request->complete_in_target = true; |
6f231dda | 1303 | |
f1f52e75 DW |
1304 | *complete_to_host_ptr = |
1305 | isci_perform_normal_io_completion; | |
1306 | } else { | |
1307 | /* Task in the target is not done. */ | |
1308 | *response_ptr = SAS_TASK_UNDELIVERED; | |
a5fde225 | 1309 | |
f1f52e75 DW |
1310 | if ((isci_device->status == isci_stopping) || |
1311 | (isci_device->status == isci_stopped)) | |
1312 | *status_ptr = SAS_DEVICE_UNKNOWN; | |
1313 | else | |
1314 | *status_ptr = SAM_STAT_TASK_ABORTED; | |
6f231dda | 1315 | |
f1f52e75 | 1316 | request->complete_in_target = false; |
6f231dda | 1317 | |
f1f52e75 DW |
1318 | *complete_to_host_ptr = |
1319 | isci_perform_error_io_completion; | |
1320 | } | |
1321 | ||
1322 | break; | |
1323 | ||
1324 | case SCU_TASK_DONE_CRC_ERR: | |
1325 | case SCU_TASK_DONE_NAK_CMD_ERR: | |
1326 | case SCU_TASK_DONE_EXCESS_DATA: | |
1327 | case SCU_TASK_DONE_UNEXP_FIS: | |
1328 | /* Also SCU_TASK_DONE_UNEXP_RESP: */ | |
1329 | case SCU_TASK_DONE_VIIT_ENTRY_NV: /* TODO - conditions? */ | |
1330 | case SCU_TASK_DONE_IIT_ENTRY_NV: /* TODO - conditions? */ | |
1331 | case SCU_TASK_DONE_RNCNV_OUTBOUND: /* TODO - conditions? */ | |
1332 | /* These are conditions in which the target | |
1333 | * has completed the task, so that no cleanup | |
1334 | * is necessary. | |
6f231dda | 1335 | */ |
f1f52e75 | 1336 | *response_ptr = SAS_TASK_COMPLETE; |
6f231dda DW |
1337 | |
1338 | /* See if the device has been/is being stopped. Note | |
1339 | * that we ignore the quiesce state, since we are | |
1340 | * concerned about the actual device state. | |
1341 | */ | |
1342 | if ((isci_device->status == isci_stopping) || | |
1343 | (isci_device->status == isci_stopped)) | |
f1f52e75 | 1344 | *status_ptr = SAS_DEVICE_UNKNOWN; |
6f231dda | 1345 | else |
f1f52e75 | 1346 | *status_ptr = SAS_ABORTED_TASK; |
6f231dda | 1347 | |
f1f52e75 | 1348 | request->complete_in_target = true; |
a5fde225 | 1349 | |
f1f52e75 | 1350 | *complete_to_host_ptr = isci_perform_normal_io_completion; |
6f231dda DW |
1351 | break; |
1352 | ||
6f231dda | 1353 | |
f1f52e75 DW |
1354 | /* Note that the only open reject completion codes seen here will be |
1355 | * abandon-class codes; all others are automatically retried in the SCU. | |
1356 | */ | |
1357 | case SCU_TASK_OPEN_REJECT_WRONG_DESTINATION: | |
a5fde225 | 1358 | |
f1f52e75 DW |
1359 | isci_request_set_open_reject_status( |
1360 | request, task, response_ptr, status_ptr, | |
1361 | complete_to_host_ptr, SAS_OREJ_WRONG_DEST); | |
1362 | break; | |
a5fde225 | 1363 | |
f1f52e75 | 1364 | case SCU_TASK_OPEN_REJECT_ZONE_VIOLATION: |
6f231dda | 1365 | |
f1f52e75 DW |
1366 | /* Note - the return of AB0 will change when |
1367 | * libsas implements detection of zone violations. | |
1368 | */ | |
1369 | isci_request_set_open_reject_status( | |
1370 | request, task, response_ptr, status_ptr, | |
1371 | complete_to_host_ptr, SAS_OREJ_RESV_AB0); | |
1372 | break; | |
6f231dda | 1373 | |
f1f52e75 | 1374 | case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_1: |
6f231dda | 1375 | |
f1f52e75 DW |
1376 | isci_request_set_open_reject_status( |
1377 | request, task, response_ptr, status_ptr, | |
1378 | complete_to_host_ptr, SAS_OREJ_RESV_AB1); | |
1379 | break; | |
6f231dda | 1380 | |
f1f52e75 | 1381 | case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_2: |
6f231dda | 1382 | |
f1f52e75 DW |
1383 | isci_request_set_open_reject_status( |
1384 | request, task, response_ptr, status_ptr, | |
1385 | complete_to_host_ptr, SAS_OREJ_RESV_AB2); | |
1386 | break; | |
6f231dda | 1387 | |
f1f52e75 | 1388 | case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_3: |
6f231dda | 1389 | |
f1f52e75 DW |
1390 | isci_request_set_open_reject_status( |
1391 | request, task, response_ptr, status_ptr, | |
1392 | complete_to_host_ptr, SAS_OREJ_RESV_AB3); | |
1393 | break; | |
6f231dda | 1394 | |
f1f52e75 | 1395 | case SCU_TASK_OPEN_REJECT_BAD_DESTINATION: |
6f231dda | 1396 | |
f1f52e75 DW |
1397 | isci_request_set_open_reject_status( |
1398 | request, task, response_ptr, status_ptr, | |
1399 | complete_to_host_ptr, SAS_OREJ_BAD_DEST); | |
1400 | break; | |
6f231dda | 1401 | |
f1f52e75 | 1402 | case SCU_TASK_OPEN_REJECT_STP_RESOURCES_BUSY: |
6f231dda | 1403 | |
f1f52e75 DW |
1404 | isci_request_set_open_reject_status( |
1405 | request, task, response_ptr, status_ptr, | |
1406 | complete_to_host_ptr, SAS_OREJ_STP_NORES); | |
1407 | break; | |
6f231dda | 1408 | |
f1f52e75 | 1409 | case SCU_TASK_OPEN_REJECT_PROTOCOL_NOT_SUPPORTED: |
6f231dda | 1410 | |
f1f52e75 DW |
1411 | isci_request_set_open_reject_status( |
1412 | request, task, response_ptr, status_ptr, | |
1413 | complete_to_host_ptr, SAS_OREJ_EPROTO); | |
1414 | break; | |
6f231dda | 1415 | |
f1f52e75 | 1416 | case SCU_TASK_OPEN_REJECT_CONNECTION_RATE_NOT_SUPPORTED: |
6f231dda | 1417 | |
f1f52e75 DW |
1418 | isci_request_set_open_reject_status( |
1419 | request, task, response_ptr, status_ptr, | |
1420 | complete_to_host_ptr, SAS_OREJ_CONN_RATE); | |
1421 | break; | |
6f231dda | 1422 | |
f1f52e75 DW |
1423 | case SCU_TASK_DONE_LL_R_ERR: |
1424 | /* Also SCU_TASK_DONE_ACK_NAK_TO: */ | |
1425 | case SCU_TASK_DONE_LL_PERR: | |
1426 | case SCU_TASK_DONE_LL_SY_TERM: | |
1427 | /* Also SCU_TASK_DONE_NAK_ERR:*/ | |
1428 | case SCU_TASK_DONE_LL_LF_TERM: | |
1429 | /* Also SCU_TASK_DONE_DATA_LEN_ERR: */ | |
1430 | case SCU_TASK_DONE_LL_ABORT_ERR: | |
1431 | case SCU_TASK_DONE_SEQ_INV_TYPE: | |
1432 | /* Also SCU_TASK_DONE_UNEXP_XR: */ | |
1433 | case SCU_TASK_DONE_XR_IU_LEN_ERR: | |
1434 | case SCU_TASK_DONE_INV_FIS_LEN: | |
1435 | /* Also SCU_TASK_DONE_XR_WD_LEN: */ | |
1436 | case SCU_TASK_DONE_SDMA_ERR: | |
1437 | case SCU_TASK_DONE_OFFSET_ERR: | |
1438 | case SCU_TASK_DONE_MAX_PLD_ERR: | |
1439 | case SCU_TASK_DONE_LF_ERR: | |
1440 | case SCU_TASK_DONE_SMP_RESP_TO_ERR: /* Escalate to dev reset? */ | |
1441 | case SCU_TASK_DONE_SMP_LL_RX_ERR: | |
1442 | case SCU_TASK_DONE_UNEXP_DATA: | |
1443 | case SCU_TASK_DONE_UNEXP_SDBFIS: | |
1444 | case SCU_TASK_DONE_REG_ERR: | |
1445 | case SCU_TASK_DONE_SDB_ERR: | |
1446 | case SCU_TASK_DONE_TASK_ABORT: | |
1447 | default: | |
1448 | /* Task in the target is not done. */ | |
1449 | *response_ptr = SAS_TASK_UNDELIVERED; | |
1450 | *status_ptr = SAM_STAT_TASK_ABORTED; | |
1451 | request->complete_in_target = false; | |
6f231dda | 1452 | |
f1f52e75 DW |
1453 | *complete_to_host_ptr = isci_perform_error_io_completion; |
1454 | break; | |
1455 | } | |
1456 | } | |
6f231dda | 1457 | |
f1f52e75 DW |
1458 | /** |
1459 | * isci_task_save_for_upper_layer_completion() - This function saves the | |
1460 | * request for later completion to the upper layer driver. | |
1461 | * @host: This parameter is a pointer to the host on which the the request | |
1462 | * should be queued (either as an error or success). | |
1463 | * @request: This parameter is the completed request. | |
1464 | * @response: This parameter is the response code for the completed task. | |
1465 | * @status: This parameter is the status code for the completed task. | |
1466 | * | |
1467 | * none. | |
1468 | */ | |
1469 | static void isci_task_save_for_upper_layer_completion( | |
1470 | struct isci_host *host, | |
1471 | struct isci_request *request, | |
1472 | enum service_response response, | |
1473 | enum exec_status status, | |
1474 | enum isci_completion_selection task_notification_selection) | |
1475 | { | |
1476 | struct sas_task *task = isci_request_access_task(request); | |
6f231dda | 1477 | |
f1f52e75 DW |
1478 | task_notification_selection |
1479 | = isci_task_set_completion_status(task, response, status, | |
1480 | task_notification_selection); | |
6f231dda | 1481 | |
f1f52e75 DW |
1482 | /* Tasks aborted specifically by a call to the lldd_abort_task |
1483 | * function should not be completed to the host in the regular path. | |
1484 | */ | |
1485 | switch (task_notification_selection) { | |
6f231dda | 1486 | |
f1f52e75 | 1487 | case isci_perform_normal_io_completion: |
6f231dda | 1488 | |
f1f52e75 DW |
1489 | /* Normal notification (task_done) */ |
1490 | dev_dbg(&host->pdev->dev, | |
1491 | "%s: Normal - task = %p, response=%d (%d), status=%d (%d)\n", | |
1492 | __func__, | |
1493 | task, | |
1494 | task->task_status.resp, response, | |
1495 | task->task_status.stat, status); | |
1496 | /* Add to the completed list. */ | |
1497 | list_add(&request->completed_node, | |
1498 | &host->requests_to_complete); | |
6f231dda | 1499 | |
f1f52e75 DW |
1500 | /* Take the request off the device's pending request list. */ |
1501 | list_del_init(&request->dev_node); | |
1502 | break; | |
6f231dda | 1503 | |
f1f52e75 DW |
1504 | case isci_perform_aborted_io_completion: |
1505 | /* No notification to libsas because this request is | |
1506 | * already in the abort path. | |
1507 | */ | |
1508 | dev_warn(&host->pdev->dev, | |
1509 | "%s: Aborted - task = %p, response=%d (%d), status=%d (%d)\n", | |
1510 | __func__, | |
1511 | task, | |
1512 | task->task_status.resp, response, | |
1513 | task->task_status.stat, status); | |
6f231dda | 1514 | |
f1f52e75 DW |
1515 | /* Wake up whatever process was waiting for this |
1516 | * request to complete. | |
1517 | */ | |
1518 | WARN_ON(request->io_request_completion == NULL); | |
6f231dda | 1519 | |
f1f52e75 DW |
1520 | if (request->io_request_completion != NULL) { |
1521 | ||
1522 | /* Signal whoever is waiting that this | |
1523 | * request is complete. | |
1524 | */ | |
1525 | complete(request->io_request_completion); | |
1526 | } | |
1527 | break; | |
1528 | ||
1529 | case isci_perform_error_io_completion: | |
1530 | /* Use sas_task_abort */ | |
1531 | dev_warn(&host->pdev->dev, | |
1532 | "%s: Error - task = %p, response=%d (%d), status=%d (%d)\n", | |
1533 | __func__, | |
1534 | task, | |
1535 | task->task_status.resp, response, | |
1536 | task->task_status.stat, status); | |
1537 | /* Add to the aborted list. */ | |
1538 | list_add(&request->completed_node, | |
1539 | &host->requests_to_errorback); | |
1540 | break; | |
1541 | ||
1542 | default: | |
1543 | dev_warn(&host->pdev->dev, | |
1544 | "%s: Unknown - task = %p, response=%d (%d), status=%d (%d)\n", | |
1545 | __func__, | |
1546 | task, | |
1547 | task->task_status.resp, response, | |
1548 | task->task_status.stat, status); | |
1549 | ||
1550 | /* Add to the error to libsas list. */ | |
1551 | list_add(&request->completed_node, | |
1552 | &host->requests_to_errorback); | |
1553 | break; | |
1554 | } | |
1555 | } | |
1556 | ||
1557 | static void isci_request_io_request_complete(struct isci_host *isci_host, | |
1558 | struct isci_request *request, | |
1559 | enum sci_io_status completion_status) | |
1560 | { | |
1561 | struct sas_task *task = isci_request_access_task(request); | |
1562 | struct ssp_response_iu *resp_iu; | |
1563 | void *resp_buf; | |
1564 | unsigned long task_flags; | |
1565 | struct isci_remote_device *isci_device = request->isci_device; | |
1566 | enum service_response response = SAS_TASK_UNDELIVERED; | |
1567 | enum exec_status status = SAS_ABORTED_TASK; | |
1568 | enum isci_request_status request_status; | |
1569 | enum isci_completion_selection complete_to_host | |
1570 | = isci_perform_normal_io_completion; | |
1571 | ||
1572 | dev_dbg(&isci_host->pdev->dev, | |
1573 | "%s: request = %p, task = %p,\n" | |
1574 | "task->data_dir = %d completion_status = 0x%x\n", | |
1575 | __func__, | |
1576 | request, | |
1577 | task, | |
1578 | task->data_dir, | |
1579 | completion_status); | |
1580 | ||
1581 | spin_lock(&request->state_lock); | |
1582 | request_status = isci_request_get_state(request); | |
1583 | ||
1584 | /* Decode the request status. Note that if the request has been | |
1585 | * aborted by a task management function, we don't care | |
1586 | * what the status is. | |
1587 | */ | |
1588 | switch (request_status) { | |
1589 | ||
1590 | case aborted: | |
1591 | /* "aborted" indicates that the request was aborted by a task | |
1592 | * management function, since once a task management request is | |
1593 | * perfomed by the device, the request only completes because | |
1594 | * of the subsequent driver terminate. | |
1595 | * | |
1596 | * Aborted also means an external thread is explicitly managing | |
1597 | * this request, so that we do not complete it up the stack. | |
1598 | * | |
1599 | * The target is still there (since the TMF was successful). | |
1600 | */ | |
1601 | request->complete_in_target = true; | |
1602 | response = SAS_TASK_COMPLETE; | |
1603 | ||
1604 | /* See if the device has been/is being stopped. Note | |
1605 | * that we ignore the quiesce state, since we are | |
1606 | * concerned about the actual device state. | |
1607 | */ | |
1608 | if ((isci_device->status == isci_stopping) | |
1609 | || (isci_device->status == isci_stopped) | |
1610 | ) | |
1611 | status = SAS_DEVICE_UNKNOWN; | |
1612 | else | |
1613 | status = SAS_ABORTED_TASK; | |
1614 | ||
1615 | complete_to_host = isci_perform_aborted_io_completion; | |
1616 | /* This was an aborted request. */ | |
1617 | ||
1618 | spin_unlock(&request->state_lock); | |
1619 | break; | |
1620 | ||
1621 | case aborting: | |
1622 | /* aborting means that the task management function tried and | |
1623 | * failed to abort the request. We need to note the request | |
1624 | * as SAS_TASK_UNDELIVERED, so that the scsi mid layer marks the | |
1625 | * target as down. | |
1626 | * | |
1627 | * Aborting also means an external thread is explicitly managing | |
1628 | * this request, so that we do not complete it up the stack. | |
1629 | */ | |
1630 | request->complete_in_target = true; | |
1631 | response = SAS_TASK_UNDELIVERED; | |
1632 | ||
1633 | if ((isci_device->status == isci_stopping) || | |
1634 | (isci_device->status == isci_stopped)) | |
1635 | /* The device has been /is being stopped. Note that | |
1636 | * we ignore the quiesce state, since we are | |
1637 | * concerned about the actual device state. | |
1638 | */ | |
1639 | status = SAS_DEVICE_UNKNOWN; | |
1640 | else | |
1641 | status = SAS_PHY_DOWN; | |
1642 | ||
1643 | complete_to_host = isci_perform_aborted_io_completion; | |
1644 | ||
1645 | /* This was an aborted request. */ | |
1646 | ||
1647 | spin_unlock(&request->state_lock); | |
1648 | break; | |
1649 | ||
1650 | case terminating: | |
1651 | ||
1652 | /* This was an terminated request. This happens when | |
1653 | * the I/O is being terminated because of an action on | |
1654 | * the device (reset, tear down, etc.), and the I/O needs | |
1655 | * to be completed up the stack. | |
1656 | */ | |
1657 | request->complete_in_target = true; | |
1658 | response = SAS_TASK_UNDELIVERED; | |
1659 | ||
1660 | /* See if the device has been/is being stopped. Note | |
1661 | * that we ignore the quiesce state, since we are | |
1662 | * concerned about the actual device state. | |
1663 | */ | |
1664 | if ((isci_device->status == isci_stopping) || | |
1665 | (isci_device->status == isci_stopped)) | |
1666 | status = SAS_DEVICE_UNKNOWN; | |
1667 | else | |
1668 | status = SAS_ABORTED_TASK; | |
1669 | ||
1670 | complete_to_host = isci_perform_aborted_io_completion; | |
1671 | ||
1672 | /* This was a terminated request. */ | |
1673 | ||
1674 | spin_unlock(&request->state_lock); | |
1675 | break; | |
1676 | ||
1677 | default: | |
1678 | ||
1679 | /* The request is done from an SCU HW perspective. */ | |
1680 | request->status = completed; | |
1681 | ||
1682 | spin_unlock(&request->state_lock); | |
1683 | ||
1684 | /* This is an active request being completed from the core. */ | |
1685 | switch (completion_status) { | |
1686 | ||
1687 | case SCI_IO_FAILURE_RESPONSE_VALID: | |
1688 | dev_dbg(&isci_host->pdev->dev, | |
1689 | "%s: SCI_IO_FAILURE_RESPONSE_VALID (%p/%p)\n", | |
1690 | __func__, | |
1691 | request, | |
1692 | task); | |
1693 | ||
1694 | if (sas_protocol_ata(task->task_proto)) { | |
1695 | resp_buf = &request->sci.stp.rsp; | |
1696 | isci_request_process_stp_response(task, | |
1697 | resp_buf); | |
1698 | } else if (SAS_PROTOCOL_SSP == task->task_proto) { | |
1699 | ||
1700 | /* crack the iu response buffer. */ | |
1701 | resp_iu = &request->sci.ssp.rsp; | |
1702 | isci_request_process_response_iu(task, resp_iu, | |
1703 | &isci_host->pdev->dev); | |
1704 | ||
1705 | } else if (SAS_PROTOCOL_SMP == task->task_proto) { | |
1706 | ||
1707 | dev_err(&isci_host->pdev->dev, | |
1708 | "%s: SCI_IO_FAILURE_RESPONSE_VALID: " | |
1709 | "SAS_PROTOCOL_SMP protocol\n", | |
1710 | __func__); | |
1711 | ||
1712 | } else | |
1713 | dev_err(&isci_host->pdev->dev, | |
1714 | "%s: unknown protocol\n", __func__); | |
1715 | ||
1716 | /* use the task status set in the task struct by the | |
1717 | * isci_request_process_response_iu call. | |
1718 | */ | |
1719 | request->complete_in_target = true; | |
1720 | response = task->task_status.resp; | |
1721 | status = task->task_status.stat; | |
1722 | break; | |
1723 | ||
1724 | case SCI_IO_SUCCESS: | |
1725 | case SCI_IO_SUCCESS_IO_DONE_EARLY: | |
1726 | ||
1727 | response = SAS_TASK_COMPLETE; | |
1728 | status = SAM_STAT_GOOD; | |
1729 | request->complete_in_target = true; | |
1730 | ||
1731 | if (task->task_proto == SAS_PROTOCOL_SMP) { | |
1732 | void *rsp = &request->sci.smp.rsp; | |
1733 | ||
1734 | dev_dbg(&isci_host->pdev->dev, | |
1735 | "%s: SMP protocol completion\n", | |
1736 | __func__); | |
1737 | ||
1738 | sg_copy_from_buffer( | |
1739 | &task->smp_task.smp_resp, 1, | |
1740 | rsp, sizeof(struct smp_resp)); | |
1741 | } else if (completion_status | |
1742 | == SCI_IO_SUCCESS_IO_DONE_EARLY) { | |
1743 | ||
1744 | /* This was an SSP / STP / SATA transfer. | |
1745 | * There is a possibility that less data than | |
1746 | * the maximum was transferred. | |
1747 | */ | |
1748 | u32 transferred_length = sci_req_tx_bytes(&request->sci); | |
1749 | ||
1750 | task->task_status.residual | |
1751 | = task->total_xfer_len - transferred_length; | |
1752 | ||
1753 | /* If there were residual bytes, call this an | |
1754 | * underrun. | |
1755 | */ | |
1756 | if (task->task_status.residual != 0) | |
1757 | status = SAS_DATA_UNDERRUN; | |
1758 | ||
1759 | dev_dbg(&isci_host->pdev->dev, | |
1760 | "%s: SCI_IO_SUCCESS_IO_DONE_EARLY %d\n", | |
1761 | __func__, | |
1762 | status); | |
1763 | ||
1764 | } else | |
1765 | dev_dbg(&isci_host->pdev->dev, | |
1766 | "%s: SCI_IO_SUCCESS\n", | |
1767 | __func__); | |
1768 | ||
1769 | break; | |
1770 | ||
1771 | case SCI_IO_FAILURE_TERMINATED: | |
1772 | dev_dbg(&isci_host->pdev->dev, | |
1773 | "%s: SCI_IO_FAILURE_TERMINATED (%p/%p)\n", | |
1774 | __func__, | |
1775 | request, | |
1776 | task); | |
1777 | ||
1778 | /* The request was terminated explicitly. No handling | |
1779 | * is needed in the SCSI error handler path. | |
1780 | */ | |
1781 | request->complete_in_target = true; | |
1782 | response = SAS_TASK_UNDELIVERED; | |
1783 | ||
1784 | /* See if the device has been/is being stopped. Note | |
1785 | * that we ignore the quiesce state, since we are | |
1786 | * concerned about the actual device state. | |
1787 | */ | |
1788 | if ((isci_device->status == isci_stopping) || | |
1789 | (isci_device->status == isci_stopped)) | |
1790 | status = SAS_DEVICE_UNKNOWN; | |
1791 | else | |
1792 | status = SAS_ABORTED_TASK; | |
1793 | ||
1794 | complete_to_host = isci_perform_normal_io_completion; | |
1795 | break; | |
1796 | ||
1797 | case SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR: | |
1798 | ||
1799 | isci_request_handle_controller_specific_errors( | |
1800 | isci_device, request, task, &response, &status, | |
1801 | &complete_to_host); | |
1802 | ||
1803 | break; | |
1804 | ||
1805 | case SCI_IO_FAILURE_REMOTE_DEVICE_RESET_REQUIRED: | |
1806 | /* This is a special case, in that the I/O completion | |
1807 | * is telling us that the device needs a reset. | |
1808 | * In order for the device reset condition to be | |
1809 | * noticed, the I/O has to be handled in the error | |
1810 | * handler. Set the reset flag and cause the | |
1811 | * SCSI error thread to be scheduled. | |
1812 | */ | |
1813 | spin_lock_irqsave(&task->task_state_lock, task_flags); | |
1814 | task->task_state_flags |= SAS_TASK_NEED_DEV_RESET; | |
6f231dda DW |
1815 | spin_unlock_irqrestore(&task->task_state_lock, task_flags); |
1816 | ||
f1f52e75 DW |
1817 | /* Fail the I/O. */ |
1818 | response = SAS_TASK_UNDELIVERED; | |
1819 | status = SAM_STAT_TASK_ABORTED; | |
1820 | ||
1821 | complete_to_host = isci_perform_error_io_completion; | |
1822 | request->complete_in_target = false; | |
1823 | break; | |
1824 | ||
1825 | default: | |
1826 | /* Catch any otherwise unhandled error codes here. */ | |
1827 | dev_warn(&isci_host->pdev->dev, | |
1828 | "%s: invalid completion code: 0x%x - " | |
1829 | "isci_request = %p\n", | |
1830 | __func__, completion_status, request); | |
1831 | ||
1832 | response = SAS_TASK_UNDELIVERED; | |
1833 | ||
1834 | /* See if the device has been/is being stopped. Note | |
1835 | * that we ignore the quiesce state, since we are | |
1836 | * concerned about the actual device state. | |
1837 | */ | |
1838 | if ((isci_device->status == isci_stopping) || | |
1839 | (isci_device->status == isci_stopped)) | |
1840 | status = SAS_DEVICE_UNKNOWN; | |
1841 | else | |
1842 | status = SAS_ABORTED_TASK; | |
1843 | ||
1844 | complete_to_host = isci_perform_error_io_completion; | |
1845 | request->complete_in_target = false; | |
1846 | break; | |
1847 | } | |
1848 | break; | |
1849 | } | |
1850 | ||
1851 | isci_request_unmap_sgl(request, isci_host->pdev); | |
1852 | ||
1853 | /* Put the completed request on the correct list */ | |
1854 | isci_task_save_for_upper_layer_completion(isci_host, request, response, | |
1855 | status, complete_to_host | |
1856 | ); | |
1857 | ||
1858 | /* complete the io request to the core. */ | |
1859 | scic_controller_complete_io(&isci_host->sci, | |
1860 | &isci_device->sci, | |
1861 | &request->sci); | |
1862 | /* set terminated handle so it cannot be completed or | |
1863 | * terminated again, and to cause any calls into abort | |
1864 | * task to recognize the already completed case. | |
1865 | */ | |
1866 | request->terminated = true; | |
1867 | ||
1868 | isci_host_can_dequeue(isci_host, 1); | |
1869 | } | |
1870 | ||
1871 | /** | |
1872 | * scic_sds_request_initial_state_enter() - | |
1873 | * @object: This parameter specifies the base object for which the state | |
1874 | * transition is occurring. | |
1875 | * | |
1876 | * This method implements the actions taken when entering the | |
1877 | * SCI_BASE_REQUEST_STATE_INITIAL state. This state is entered when the initial | |
1878 | * base request is constructed. Entry into the initial state sets all handlers | |
1879 | * for the io request object to their default handlers. none | |
1880 | */ | |
1881 | static void scic_sds_request_initial_state_enter(void *object) | |
1882 | { | |
1883 | struct scic_sds_request *sci_req = object; | |
1884 | ||
1885 | SET_STATE_HANDLER( | |
1886 | sci_req, | |
1887 | scic_sds_request_state_handler_table, | |
1888 | SCI_BASE_REQUEST_STATE_INITIAL | |
1889 | ); | |
1890 | } | |
1891 | ||
1892 | /** | |
1893 | * scic_sds_request_constructed_state_enter() - | |
1894 | * @object: The io request object that is to enter the constructed state. | |
1895 | * | |
1896 | * This method implements the actions taken when entering the | |
1897 | * SCI_BASE_REQUEST_STATE_CONSTRUCTED state. The method sets the state handlers | |
1898 | * for the the constructed state. none | |
1899 | */ | |
1900 | static void scic_sds_request_constructed_state_enter(void *object) | |
1901 | { | |
1902 | struct scic_sds_request *sci_req = object; | |
1903 | ||
1904 | SET_STATE_HANDLER( | |
1905 | sci_req, | |
1906 | scic_sds_request_state_handler_table, | |
1907 | SCI_BASE_REQUEST_STATE_CONSTRUCTED | |
1908 | ); | |
1909 | } | |
1910 | ||
1911 | /** | |
1912 | * scic_sds_request_started_state_enter() - | |
1913 | * @object: This parameter specifies the base object for which the state | |
1914 | * transition is occurring. This is cast into a SCIC_SDS_IO_REQUEST object. | |
1915 | * | |
1916 | * This method implements the actions taken when entering the | |
1917 | * SCI_BASE_REQUEST_STATE_STARTED state. If the io request object type is a | |
1918 | * SCSI Task request we must enter the started substate machine. none | |
1919 | */ | |
1920 | static void scic_sds_request_started_state_enter(void *object) | |
1921 | { | |
1922 | struct scic_sds_request *sci_req = object; | |
1923 | ||
1924 | SET_STATE_HANDLER( | |
1925 | sci_req, | |
1926 | scic_sds_request_state_handler_table, | |
1927 | SCI_BASE_REQUEST_STATE_STARTED | |
1928 | ); | |
1929 | ||
1930 | /* | |
1931 | * Most of the request state machines have a started substate machine so | |
1932 | * start its execution on the entry to the started state. */ | |
1933 | if (sci_req->has_started_substate_machine == true) | |
1934 | sci_base_state_machine_start(&sci_req->started_substate_machine); | |
1935 | } | |
1936 | ||
1937 | /** | |
1938 | * scic_sds_request_started_state_exit() - | |
1939 | * @object: This parameter specifies the base object for which the state | |
1940 | * transition is occurring. This object is cast into a SCIC_SDS_IO_REQUEST | |
1941 | * object. | |
1942 | * | |
1943 | * This method implements the actions taken when exiting the | |
1944 | * SCI_BASE_REQUEST_STATE_STARTED state. For task requests the action will be | |
1945 | * to stop the started substate machine. none | |
1946 | */ | |
1947 | static void scic_sds_request_started_state_exit(void *object) | |
1948 | { | |
1949 | struct scic_sds_request *sci_req = object; | |
1950 | ||
1951 | if (sci_req->has_started_substate_machine == true) | |
1952 | sci_base_state_machine_stop(&sci_req->started_substate_machine); | |
1953 | } | |
1954 | ||
1955 | /** | |
1956 | * scic_sds_request_completed_state_enter() - | |
1957 | * @object: This parameter specifies the base object for which the state | |
1958 | * transition is occurring. This object is cast into a SCIC_SDS_IO_REQUEST | |
1959 | * object. | |
1960 | * | |
1961 | * This method implements the actions taken when entering the | |
1962 | * SCI_BASE_REQUEST_STATE_COMPLETED state. This state is entered when the | |
1963 | * SCIC_SDS_IO_REQUEST has completed. The method will decode the request | |
1964 | * completion status and convert it to an enum sci_status to return in the | |
1965 | * completion callback function. none | |
1966 | */ | |
1967 | static void scic_sds_request_completed_state_enter(void *object) | |
1968 | { | |
1969 | struct scic_sds_request *sci_req = object; | |
1970 | struct scic_sds_controller *scic = | |
1971 | scic_sds_request_get_controller(sci_req); | |
1972 | struct isci_host *ihost = scic_to_ihost(scic); | |
1973 | struct isci_request *ireq = sci_req_to_ireq(sci_req); | |
1974 | ||
1975 | SET_STATE_HANDLER(sci_req, | |
1976 | scic_sds_request_state_handler_table, | |
1977 | SCI_BASE_REQUEST_STATE_COMPLETED); | |
1978 | ||
1979 | /* Tell the SCI_USER that the IO request is complete */ | |
1980 | if (sci_req->is_task_management_request == false) | |
1981 | isci_request_io_request_complete(ihost, ireq, | |
1982 | sci_req->sci_status); | |
1983 | else | |
1984 | isci_task_request_complete(ihost, ireq, sci_req->sci_status); | |
1985 | } | |
1986 | ||
1987 | /** | |
1988 | * scic_sds_request_aborting_state_enter() - | |
1989 | * @object: This parameter specifies the base object for which the state | |
1990 | * transition is occurring. This object is cast into a SCIC_SDS_IO_REQUEST | |
1991 | * object. | |
1992 | * | |
1993 | * This method implements the actions taken when entering the | |
1994 | * SCI_BASE_REQUEST_STATE_ABORTING state. none | |
1995 | */ | |
1996 | static void scic_sds_request_aborting_state_enter(void *object) | |
1997 | { | |
1998 | struct scic_sds_request *sci_req = object; | |
1999 | ||
2000 | /* Setting the abort bit in the Task Context is required by the silicon. */ | |
2001 | sci_req->task_context_buffer->abort = 1; | |
2002 | ||
2003 | SET_STATE_HANDLER( | |
2004 | sci_req, | |
2005 | scic_sds_request_state_handler_table, | |
2006 | SCI_BASE_REQUEST_STATE_ABORTING | |
2007 | ); | |
2008 | } | |
2009 | ||
2010 | /** | |
2011 | * scic_sds_request_final_state_enter() - | |
2012 | * @object: This parameter specifies the base object for which the state | |
2013 | * transition is occurring. This is cast into a SCIC_SDS_IO_REQUEST object. | |
2014 | * | |
2015 | * This method implements the actions taken when entering the | |
2016 | * SCI_BASE_REQUEST_STATE_FINAL state. The only action required is to put the | |
2017 | * state handlers in place. none | |
2018 | */ | |
2019 | static void scic_sds_request_final_state_enter(void *object) | |
2020 | { | |
2021 | struct scic_sds_request *sci_req = object; | |
2022 | ||
2023 | SET_STATE_HANDLER( | |
2024 | sci_req, | |
2025 | scic_sds_request_state_handler_table, | |
2026 | SCI_BASE_REQUEST_STATE_FINAL | |
2027 | ); | |
2028 | } | |
2029 | ||
2030 | static const struct sci_base_state scic_sds_request_state_table[] = { | |
2031 | [SCI_BASE_REQUEST_STATE_INITIAL] = { | |
2032 | .enter_state = scic_sds_request_initial_state_enter, | |
2033 | }, | |
2034 | [SCI_BASE_REQUEST_STATE_CONSTRUCTED] = { | |
2035 | .enter_state = scic_sds_request_constructed_state_enter, | |
2036 | }, | |
2037 | [SCI_BASE_REQUEST_STATE_STARTED] = { | |
2038 | .enter_state = scic_sds_request_started_state_enter, | |
2039 | .exit_state = scic_sds_request_started_state_exit | |
2040 | }, | |
2041 | [SCI_BASE_REQUEST_STATE_COMPLETED] = { | |
2042 | .enter_state = scic_sds_request_completed_state_enter, | |
2043 | }, | |
2044 | [SCI_BASE_REQUEST_STATE_ABORTING] = { | |
2045 | .enter_state = scic_sds_request_aborting_state_enter, | |
2046 | }, | |
2047 | [SCI_BASE_REQUEST_STATE_FINAL] = { | |
2048 | .enter_state = scic_sds_request_final_state_enter, | |
2049 | }, | |
2050 | }; | |
2051 | ||
2052 | static void scic_sds_general_request_construct(struct scic_sds_controller *scic, | |
2053 | struct scic_sds_remote_device *sci_dev, | |
2054 | u16 io_tag, struct scic_sds_request *sci_req) | |
2055 | { | |
2056 | sci_base_state_machine_construct(&sci_req->state_machine, sci_req, | |
2057 | scic_sds_request_state_table, SCI_BASE_REQUEST_STATE_INITIAL); | |
2058 | sci_base_state_machine_start(&sci_req->state_machine); | |
2059 | ||
2060 | sci_req->io_tag = io_tag; | |
2061 | sci_req->owning_controller = scic; | |
2062 | sci_req->target_device = sci_dev; | |
2063 | sci_req->has_started_substate_machine = false; | |
2064 | sci_req->protocol = SCIC_NO_PROTOCOL; | |
2065 | sci_req->saved_rx_frame_index = SCU_INVALID_FRAME_INDEX; | |
2066 | sci_req->device_sequence = scic_sds_remote_device_get_sequence(sci_dev); | |
2067 | ||
2068 | sci_req->sci_status = SCI_SUCCESS; | |
2069 | sci_req->scu_status = 0; | |
2070 | sci_req->post_context = 0xFFFFFFFF; | |
2071 | ||
2072 | sci_req->is_task_management_request = false; | |
2073 | ||
2074 | if (io_tag == SCI_CONTROLLER_INVALID_IO_TAG) { | |
2075 | sci_req->was_tag_assigned_by_user = false; | |
2076 | sci_req->task_context_buffer = NULL; | |
2077 | } else { | |
2078 | sci_req->was_tag_assigned_by_user = true; | |
2079 | ||
2080 | sci_req->task_context_buffer = | |
2081 | scic_sds_controller_get_task_context_buffer(scic, io_tag); | |
2082 | } | |
2083 | } | |
2084 | ||
2085 | static enum sci_status | |
2086 | scic_io_request_construct(struct scic_sds_controller *scic, | |
2087 | struct scic_sds_remote_device *sci_dev, | |
2088 | u16 io_tag, struct scic_sds_request *sci_req) | |
2089 | { | |
2090 | struct domain_device *dev = sci_dev_to_domain(sci_dev); | |
2091 | enum sci_status status = SCI_SUCCESS; | |
2092 | ||
2093 | /* Build the common part of the request */ | |
2094 | scic_sds_general_request_construct(scic, sci_dev, io_tag, sci_req); | |
2095 | ||
2096 | if (sci_dev->rnc.remote_node_index == | |
2097 | SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX) | |
2098 | return SCI_FAILURE_INVALID_REMOTE_DEVICE; | |
2099 | ||
2100 | if (dev->dev_type == SAS_END_DEV) | |
2101 | scic_sds_ssp_io_request_assign_buffers(sci_req); | |
2102 | else if ((dev->dev_type == SATA_DEV) || | |
2103 | (dev->tproto & SAS_PROTOCOL_STP)) { | |
2104 | scic_sds_stp_request_assign_buffers(sci_req); | |
2105 | memset(&sci_req->stp.cmd, 0, sizeof(sci_req->stp.cmd)); | |
2106 | } else if (dev_is_expander(dev)) { | |
2107 | scic_sds_smp_request_assign_buffers(sci_req); | |
2108 | memset(&sci_req->smp.cmd, 0, sizeof(sci_req->smp.cmd)); | |
2109 | } else | |
2110 | status = SCI_FAILURE_UNSUPPORTED_PROTOCOL; | |
2111 | ||
2112 | if (status == SCI_SUCCESS) { | |
2113 | memset(sci_req->task_context_buffer, 0, | |
2114 | offsetof(struct scu_task_context, sgl_pair_ab)); | |
2115 | } | |
2116 | ||
2117 | return status; | |
2118 | } | |
2119 | ||
2120 | enum sci_status scic_task_request_construct(struct scic_sds_controller *scic, | |
2121 | struct scic_sds_remote_device *sci_dev, | |
2122 | u16 io_tag, struct scic_sds_request *sci_req) | |
2123 | { | |
2124 | struct domain_device *dev = sci_dev_to_domain(sci_dev); | |
2125 | enum sci_status status = SCI_SUCCESS; | |
2126 | ||
2127 | /* Build the common part of the request */ | |
2128 | scic_sds_general_request_construct(scic, sci_dev, io_tag, sci_req); | |
2129 | ||
2130 | if (dev->dev_type == SAS_END_DEV) { | |
2131 | scic_sds_ssp_task_request_assign_buffers(sci_req); | |
2132 | ||
2133 | sci_req->has_started_substate_machine = true; | |
2134 | ||
2135 | /* Construct the started sub-state machine. */ | |
2136 | sci_base_state_machine_construct( | |
2137 | &sci_req->started_substate_machine, | |
2138 | sci_req, | |
2139 | scic_sds_io_request_started_task_mgmt_substate_table, | |
2140 | SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION | |
2141 | ); | |
2142 | } else if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) | |
2143 | scic_sds_stp_request_assign_buffers(sci_req); | |
2144 | else | |
2145 | status = SCI_FAILURE_UNSUPPORTED_PROTOCOL; | |
2146 | ||
2147 | if (status == SCI_SUCCESS) { | |
2148 | sci_req->is_task_management_request = true; | |
2149 | memset(sci_req->task_context_buffer, 0, sizeof(struct scu_task_context)); | |
2150 | } | |
2151 | ||
2152 | return status; | |
2153 | } | |
2154 | ||
2155 | static enum sci_status isci_request_ssp_request_construct( | |
2156 | struct isci_request *request) | |
2157 | { | |
2158 | enum sci_status status; | |
2159 | ||
2160 | dev_dbg(&request->isci_host->pdev->dev, | |
2161 | "%s: request = %p\n", | |
2162 | __func__, | |
2163 | request); | |
2164 | status = scic_io_request_construct_basic_ssp(&request->sci); | |
2165 | return status; | |
2166 | } | |
2167 | ||
2168 | static enum sci_status isci_request_stp_request_construct( | |
2169 | struct isci_request *request) | |
2170 | { | |
2171 | struct sas_task *task = isci_request_access_task(request); | |
2172 | enum sci_status status; | |
2173 | struct host_to_dev_fis *register_fis; | |
2174 | ||
2175 | dev_dbg(&request->isci_host->pdev->dev, | |
2176 | "%s: request = %p\n", | |
2177 | __func__, | |
2178 | request); | |
2179 | ||
2180 | /* Get the host_to_dev_fis from the core and copy | |
2181 | * the fis from the task into it. | |
2182 | */ | |
2183 | register_fis = isci_sata_task_to_fis_copy(task); | |
2184 | ||
2185 | status = scic_io_request_construct_basic_sata(&request->sci); | |
2186 | ||
2187 | /* Set the ncq tag in the fis, from the queue | |
2188 | * command in the task. | |
2189 | */ | |
2190 | if (isci_sata_is_task_ncq(task)) { | |
2191 | ||
2192 | isci_sata_set_ncq_tag( | |
2193 | register_fis, | |
2194 | task | |
2195 | ); | |
2196 | } | |
2197 | ||
2198 | return status; | |
2199 | } | |
2200 | ||
2201 | /* | |
2202 | * isci_smp_request_build() - This function builds the smp request. | |
2203 | * @ireq: This parameter points to the isci_request allocated in the | |
2204 | * request construct function. | |
2205 | * | |
2206 | * SCI_SUCCESS on successfull completion, or specific failure code. | |
2207 | */ | |
2208 | static enum sci_status isci_smp_request_build(struct isci_request *ireq) | |
2209 | { | |
2210 | enum sci_status status = SCI_FAILURE; | |
2211 | struct sas_task *task = isci_request_access_task(ireq); | |
2212 | struct scic_sds_request *sci_req = &ireq->sci; | |
2213 | ||
2214 | dev_dbg(&ireq->isci_host->pdev->dev, | |
2215 | "%s: request = %p\n", __func__, ireq); | |
2216 | ||
2217 | dev_dbg(&ireq->isci_host->pdev->dev, | |
2218 | "%s: smp_req len = %d\n", | |
2219 | __func__, | |
2220 | task->smp_task.smp_req.length); | |
2221 | ||
2222 | /* copy the smp_command to the address; */ | |
2223 | sg_copy_to_buffer(&task->smp_task.smp_req, 1, | |
2224 | &sci_req->smp.cmd, | |
2225 | sizeof(struct smp_req)); | |
2226 | ||
2227 | status = scic_io_request_construct_smp(sci_req); | |
2228 | if (status != SCI_SUCCESS) | |
2229 | dev_warn(&ireq->isci_host->pdev->dev, | |
2230 | "%s: failed with status = %d\n", | |
2231 | __func__, | |
2232 | status); | |
2233 | ||
2234 | return status; | |
2235 | } | |
2236 | ||
2237 | /** | |
2238 | * isci_io_request_build() - This function builds the io request object. | |
2239 | * @isci_host: This parameter specifies the ISCI host object | |
2240 | * @request: This parameter points to the isci_request object allocated in the | |
2241 | * request construct function. | |
2242 | * @sci_device: This parameter is the handle for the sci core's remote device | |
2243 | * object that is the destination for this request. | |
2244 | * | |
2245 | * SCI_SUCCESS on successfull completion, or specific failure code. | |
2246 | */ | |
2247 | static enum sci_status isci_io_request_build( | |
2248 | struct isci_host *isci_host, | |
2249 | struct isci_request *request, | |
2250 | struct isci_remote_device *isci_device) | |
2251 | { | |
2252 | enum sci_status status = SCI_SUCCESS; | |
2253 | struct sas_task *task = isci_request_access_task(request); | |
2254 | struct scic_sds_remote_device *sci_device = &isci_device->sci; | |
2255 | ||
2256 | dev_dbg(&isci_host->pdev->dev, | |
2257 | "%s: isci_device = 0x%p; request = %p, " | |
2258 | "num_scatter = %d\n", | |
2259 | __func__, | |
2260 | isci_device, | |
2261 | request, | |
2262 | task->num_scatter); | |
2263 | ||
2264 | /* map the sgl addresses, if present. | |
2265 | * libata does the mapping for sata devices | |
2266 | * before we get the request. | |
2267 | */ | |
2268 | if (task->num_scatter && | |
2269 | !sas_protocol_ata(task->task_proto) && | |
2270 | !(SAS_PROTOCOL_SMP & task->task_proto)) { | |
2271 | ||
2272 | request->num_sg_entries = dma_map_sg( | |
2273 | &isci_host->pdev->dev, | |
2274 | task->scatter, | |
2275 | task->num_scatter, | |
2276 | task->data_dir | |
2277 | ); | |
2278 | ||
2279 | if (request->num_sg_entries == 0) | |
2280 | return SCI_FAILURE_INSUFFICIENT_RESOURCES; | |
2281 | } | |
2282 | ||
2283 | /* build the common request object. For now, | |
2284 | * we will let the core allocate the IO tag. | |
2285 | */ | |
2286 | status = scic_io_request_construct(&isci_host->sci, sci_device, | |
2287 | SCI_CONTROLLER_INVALID_IO_TAG, | |
2288 | &request->sci); | |
2289 | ||
2290 | if (status != SCI_SUCCESS) { | |
2291 | dev_warn(&isci_host->pdev->dev, | |
2292 | "%s: failed request construct\n", | |
2293 | __func__); | |
2294 | return SCI_FAILURE; | |
2295 | } | |
2296 | ||
2297 | switch (task->task_proto) { | |
2298 | case SAS_PROTOCOL_SMP: | |
2299 | status = isci_smp_request_build(request); | |
2300 | break; | |
2301 | case SAS_PROTOCOL_SSP: | |
2302 | status = isci_request_ssp_request_construct(request); | |
2303 | break; | |
2304 | case SAS_PROTOCOL_SATA: | |
2305 | case SAS_PROTOCOL_STP: | |
2306 | case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP: | |
2307 | status = isci_request_stp_request_construct(request); | |
2308 | break; | |
2309 | default: | |
2310 | dev_warn(&isci_host->pdev->dev, | |
2311 | "%s: unknown protocol\n", __func__); | |
2312 | return SCI_FAILURE; | |
2313 | } | |
2314 | ||
2315 | return SCI_SUCCESS; | |
2316 | } | |
2317 | ||
2318 | /** | |
2319 | * isci_request_alloc_core() - This function gets the request object from the | |
2320 | * isci_host dma cache. | |
2321 | * @isci_host: This parameter specifies the ISCI host object | |
2322 | * @isci_request: This parameter will contain the pointer to the new | |
2323 | * isci_request object. | |
2324 | * @isci_device: This parameter is the pointer to the isci remote device object | |
2325 | * that is the destination for this request. | |
2326 | * @gfp_flags: This parameter specifies the os allocation flags. | |
2327 | * | |
2328 | * SCI_SUCCESS on successfull completion, or specific failure code. | |
2329 | */ | |
2330 | static int isci_request_alloc_core( | |
2331 | struct isci_host *isci_host, | |
2332 | struct isci_request **isci_request, | |
2333 | struct isci_remote_device *isci_device, | |
2334 | gfp_t gfp_flags) | |
2335 | { | |
2336 | int ret = 0; | |
2337 | dma_addr_t handle; | |
2338 | struct isci_request *request; | |
2339 | ||
aa145102 | 2340 | |
f1f52e75 DW |
2341 | /* get pointer to dma memory. This actually points |
2342 | * to both the isci_remote_device object and the | |
2343 | * sci object. The isci object is at the beginning | |
2344 | * of the memory allocated here. | |
2345 | */ | |
2346 | request = dma_pool_alloc(isci_host->dma_pool, gfp_flags, &handle); | |
2347 | if (!request) { | |
2348 | dev_warn(&isci_host->pdev->dev, | |
2349 | "%s: dma_pool_alloc returned NULL\n", __func__); | |
2350 | return -ENOMEM; | |
2351 | } | |
6f231dda | 2352 | |
f1f52e75 DW |
2353 | /* initialize the request object. */ |
2354 | spin_lock_init(&request->state_lock); | |
2355 | request->request_daddr = handle; | |
2356 | request->isci_host = isci_host; | |
2357 | request->isci_device = isci_device; | |
2358 | request->io_request_completion = NULL; | |
2359 | request->terminated = false; | |
6f231dda | 2360 | |
f1f52e75 | 2361 | request->num_sg_entries = 0; |
6f231dda | 2362 | |
f1f52e75 | 2363 | request->complete_in_target = false; |
6f231dda | 2364 | |
f1f52e75 DW |
2365 | INIT_LIST_HEAD(&request->completed_node); |
2366 | INIT_LIST_HEAD(&request->dev_node); | |
2367 | ||
2368 | *isci_request = request; | |
2369 | isci_request_change_state(request, allocated); | |
2370 | ||
2371 | return ret; | |
2372 | } | |
2373 | ||
2374 | static int isci_request_alloc_io( | |
2375 | struct isci_host *isci_host, | |
2376 | struct sas_task *task, | |
2377 | struct isci_request **isci_request, | |
2378 | struct isci_remote_device *isci_device, | |
2379 | gfp_t gfp_flags) | |
2380 | { | |
2381 | int retval = isci_request_alloc_core(isci_host, isci_request, | |
2382 | isci_device, gfp_flags); | |
2383 | ||
2384 | if (!retval) { | |
2385 | (*isci_request)->ttype_ptr.io_task_ptr = task; | |
2386 | (*isci_request)->ttype = io_task; | |
2387 | ||
2388 | task->lldd_task = *isci_request; | |
6f231dda | 2389 | } |
f1f52e75 DW |
2390 | return retval; |
2391 | } | |
6f231dda | 2392 | |
f1f52e75 DW |
2393 | /** |
2394 | * isci_request_alloc_tmf() - This function gets the request object from the | |
2395 | * isci_host dma cache and initializes the relevant fields as a sas_task. | |
2396 | * @isci_host: This parameter specifies the ISCI host object | |
2397 | * @sas_task: This parameter is the task struct from the upper layer driver. | |
2398 | * @isci_request: This parameter will contain the pointer to the new | |
2399 | * isci_request object. | |
2400 | * @isci_device: This parameter is the pointer to the isci remote device object | |
2401 | * that is the destination for this request. | |
2402 | * @gfp_flags: This parameter specifies the os allocation flags. | |
2403 | * | |
2404 | * SCI_SUCCESS on successfull completion, or specific failure code. | |
2405 | */ | |
2406 | int isci_request_alloc_tmf( | |
2407 | struct isci_host *isci_host, | |
2408 | struct isci_tmf *isci_tmf, | |
2409 | struct isci_request **isci_request, | |
2410 | struct isci_remote_device *isci_device, | |
2411 | gfp_t gfp_flags) | |
2412 | { | |
2413 | int retval = isci_request_alloc_core(isci_host, isci_request, | |
2414 | isci_device, gfp_flags); | |
6f231dda | 2415 | |
f1f52e75 | 2416 | if (!retval) { |
6f231dda | 2417 | |
f1f52e75 DW |
2418 | (*isci_request)->ttype_ptr.tmf_task_ptr = isci_tmf; |
2419 | (*isci_request)->ttype = tmf_task; | |
2420 | } | |
2421 | return retval; | |
2422 | } | |
2423 | ||
2424 | /** | |
2425 | * isci_request_execute() - This function allocates the isci_request object, | |
2426 | * all fills in some common fields. | |
2427 | * @isci_host: This parameter specifies the ISCI host object | |
2428 | * @sas_task: This parameter is the task struct from the upper layer driver. | |
2429 | * @isci_request: This parameter will contain the pointer to the new | |
2430 | * isci_request object. | |
2431 | * @gfp_flags: This parameter specifies the os allocation flags. | |
2432 | * | |
2433 | * SCI_SUCCESS on successfull completion, or specific failure code. | |
2434 | */ | |
2435 | int isci_request_execute( | |
2436 | struct isci_host *isci_host, | |
2437 | struct sas_task *task, | |
2438 | struct isci_request **isci_request, | |
2439 | gfp_t gfp_flags) | |
2440 | { | |
2441 | int ret = 0; | |
2442 | struct scic_sds_remote_device *sci_device; | |
2443 | enum sci_status status = SCI_FAILURE_UNSUPPORTED_PROTOCOL; | |
2444 | struct isci_remote_device *isci_device; | |
2445 | struct isci_request *request; | |
2446 | unsigned long flags; | |
2447 | ||
2448 | isci_device = task->dev->lldd_dev; | |
2449 | sci_device = &isci_device->sci; | |
2450 | ||
2451 | /* do common allocation and init of request object. */ | |
2452 | ret = isci_request_alloc_io( | |
2453 | isci_host, | |
2454 | task, | |
2455 | &request, | |
2456 | isci_device, | |
2457 | gfp_flags | |
2458 | ); | |
2459 | ||
2460 | if (ret) | |
2461 | goto out; | |
2462 | ||
2463 | status = isci_io_request_build(isci_host, request, isci_device); | |
2464 | if (status != SCI_SUCCESS) { | |
2465 | dev_warn(&isci_host->pdev->dev, | |
2466 | "%s: request_construct failed - status = 0x%x\n", | |
2467 | __func__, | |
2468 | status); | |
2469 | goto out; | |
2470 | } | |
2471 | ||
2472 | spin_lock_irqsave(&isci_host->scic_lock, flags); | |
2473 | ||
2474 | /* send the request, let the core assign the IO TAG. */ | |
2475 | status = scic_controller_start_io(&isci_host->sci, sci_device, | |
2476 | &request->sci, | |
2477 | SCI_CONTROLLER_INVALID_IO_TAG); | |
2478 | if (status != SCI_SUCCESS && | |
2479 | status != SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) { | |
2480 | dev_warn(&isci_host->pdev->dev, | |
2481 | "%s: failed request start (0x%x)\n", | |
2482 | __func__, status); | |
2483 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
2484 | goto out; | |
2485 | } | |
2486 | ||
2487 | /* Either I/O started OK, or the core has signaled that | |
2488 | * the device needs a target reset. | |
2489 | * | |
2490 | * In either case, hold onto the I/O for later. | |
2491 | * | |
2492 | * Update it's status and add it to the list in the | |
2493 | * remote device object. | |
6f231dda | 2494 | */ |
f1f52e75 DW |
2495 | isci_request_change_state(request, started); |
2496 | list_add(&request->dev_node, &isci_device->reqs_in_process); | |
6f231dda | 2497 | |
f1f52e75 DW |
2498 | if (status == SCI_SUCCESS) { |
2499 | /* Save the tag for possible task mgmt later. */ | |
2500 | request->io_tag = request->sci.io_tag; | |
2501 | } else { | |
2502 | /* The request did not really start in the | |
2503 | * hardware, so clear the request handle | |
2504 | * here so no terminations will be done. | |
2505 | */ | |
2506 | request->terminated = true; | |
2507 | } | |
2508 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
2509 | ||
2510 | if (status == | |
2511 | SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) { | |
2512 | /* Signal libsas that we need the SCSI error | |
2513 | * handler thread to work on this I/O and that | |
2514 | * we want a device reset. | |
2515 | */ | |
2516 | spin_lock_irqsave(&task->task_state_lock, flags); | |
2517 | task->task_state_flags |= SAS_TASK_NEED_DEV_RESET; | |
2518 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
2519 | ||
2520 | /* Cause this task to be scheduled in the SCSI error | |
2521 | * handler thread. | |
2522 | */ | |
2523 | isci_execpath_callback(isci_host, task, | |
2524 | sas_task_abort); | |
2525 | ||
2526 | /* Change the status, since we are holding | |
2527 | * the I/O until it is managed by the SCSI | |
2528 | * error handler. | |
2529 | */ | |
2530 | status = SCI_SUCCESS; | |
2531 | } | |
2532 | ||
2533 | out: | |
2534 | if (status != SCI_SUCCESS) { | |
2535 | /* release dma memory on failure. */ | |
2536 | isci_request_free(isci_host, request); | |
2537 | request = NULL; | |
2538 | ret = SCI_FAILURE; | |
2539 | } | |
2540 | ||
2541 | *isci_request = request; | |
2542 | return ret; | |
6f231dda | 2543 | } |
f1f52e75 DW |
2544 | |
2545 | ||
2546 |