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2908d778 JB |
1 | /* |
2 | * Aic94xx Task Management Functions | |
3 | * | |
4 | * Copyright (C) 2005 Adaptec, Inc. All rights reserved. | |
5 | * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com> | |
6 | * | |
7 | * This file is licensed under GPLv2. | |
8 | * | |
9 | * This file is part of the aic94xx driver. | |
10 | * | |
11 | * The aic94xx driver is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License as | |
13 | * published by the Free Software Foundation; version 2 of the | |
14 | * License. | |
15 | * | |
16 | * The aic94xx driver is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with the aic94xx driver; if not, write to the Free Software | |
23 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
24 | * | |
25 | */ | |
26 | ||
27 | #include <linux/spinlock.h> | |
28 | #include "aic94xx.h" | |
29 | #include "aic94xx_sas.h" | |
30 | #include "aic94xx_hwi.h" | |
31 | ||
32 | /* ---------- Internal enqueue ---------- */ | |
33 | ||
34 | static int asd_enqueue_internal(struct asd_ascb *ascb, | |
35 | void (*tasklet_complete)(struct asd_ascb *, | |
36 | struct done_list_struct *), | |
37 | void (*timed_out)(unsigned long)) | |
38 | { | |
39 | int res; | |
40 | ||
41 | ascb->tasklet_complete = tasklet_complete; | |
42 | ascb->uldd_timer = 1; | |
43 | ||
44 | ascb->timer.data = (unsigned long) ascb; | |
45 | ascb->timer.function = timed_out; | |
46 | ascb->timer.expires = jiffies + AIC94XX_SCB_TIMEOUT; | |
47 | ||
48 | add_timer(&ascb->timer); | |
49 | ||
50 | res = asd_post_ascb_list(ascb->ha, ascb, 1); | |
51 | if (unlikely(res)) | |
52 | del_timer(&ascb->timer); | |
53 | return res; | |
54 | } | |
55 | ||
56 | static inline void asd_timedout_common(unsigned long data) | |
57 | { | |
58 | struct asd_ascb *ascb = (void *) data; | |
59 | struct asd_seq_data *seq = &ascb->ha->seq; | |
60 | unsigned long flags; | |
61 | ||
62 | spin_lock_irqsave(&seq->pend_q_lock, flags); | |
63 | seq->pending--; | |
64 | list_del_init(&ascb->list); | |
65 | spin_unlock_irqrestore(&seq->pend_q_lock, flags); | |
66 | } | |
67 | ||
68 | /* ---------- CLEAR NEXUS ---------- */ | |
69 | ||
70 | static void asd_clear_nexus_tasklet_complete(struct asd_ascb *ascb, | |
71 | struct done_list_struct *dl) | |
72 | { | |
73 | ASD_DPRINTK("%s: here\n", __FUNCTION__); | |
74 | if (!del_timer(&ascb->timer)) { | |
75 | ASD_DPRINTK("%s: couldn't delete timer\n", __FUNCTION__); | |
76 | return; | |
77 | } | |
78 | ASD_DPRINTK("%s: opcode: 0x%x\n", __FUNCTION__, dl->opcode); | |
79 | ascb->uldd_task = (void *) (unsigned long) dl->opcode; | |
80 | complete(&ascb->completion); | |
81 | } | |
82 | ||
83 | static void asd_clear_nexus_timedout(unsigned long data) | |
84 | { | |
85 | struct asd_ascb *ascb = (void *) data; | |
86 | ||
87 | ASD_DPRINTK("%s: here\n", __FUNCTION__); | |
88 | asd_timedout_common(data); | |
89 | ascb->uldd_task = (void *) TMF_RESP_FUNC_FAILED; | |
90 | complete(&ascb->completion); | |
91 | } | |
92 | ||
93 | #define CLEAR_NEXUS_PRE \ | |
94 | ASD_DPRINTK("%s: PRE\n", __FUNCTION__); \ | |
95 | res = 1; \ | |
96 | ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL); \ | |
97 | if (!ascb) \ | |
98 | return -ENOMEM; \ | |
99 | \ | |
100 | scb = ascb->scb; \ | |
101 | scb->header.opcode = CLEAR_NEXUS | |
102 | ||
103 | #define CLEAR_NEXUS_POST \ | |
104 | ASD_DPRINTK("%s: POST\n", __FUNCTION__); \ | |
105 | res = asd_enqueue_internal(ascb, asd_clear_nexus_tasklet_complete, \ | |
106 | asd_clear_nexus_timedout); \ | |
107 | if (res) \ | |
108 | goto out_err; \ | |
109 | ASD_DPRINTK("%s: clear nexus posted, waiting...\n", __FUNCTION__); \ | |
110 | wait_for_completion(&ascb->completion); \ | |
111 | res = (int) (unsigned long) ascb->uldd_task; \ | |
112 | if (res == TC_NO_ERROR) \ | |
113 | res = TMF_RESP_FUNC_COMPLETE; \ | |
114 | out_err: \ | |
115 | asd_ascb_free(ascb); \ | |
116 | return res | |
117 | ||
118 | int asd_clear_nexus_ha(struct sas_ha_struct *sas_ha) | |
119 | { | |
120 | struct asd_ha_struct *asd_ha = sas_ha->lldd_ha; | |
121 | struct asd_ascb *ascb; | |
122 | struct scb *scb; | |
123 | int res; | |
124 | ||
125 | CLEAR_NEXUS_PRE; | |
126 | scb->clear_nexus.nexus = NEXUS_ADAPTER; | |
127 | CLEAR_NEXUS_POST; | |
128 | } | |
129 | ||
130 | int asd_clear_nexus_port(struct asd_sas_port *port) | |
131 | { | |
132 | struct asd_ha_struct *asd_ha = port->ha->lldd_ha; | |
133 | struct asd_ascb *ascb; | |
134 | struct scb *scb; | |
135 | int res; | |
136 | ||
137 | CLEAR_NEXUS_PRE; | |
138 | scb->clear_nexus.nexus = NEXUS_PORT; | |
139 | scb->clear_nexus.conn_mask = port->phy_mask; | |
140 | CLEAR_NEXUS_POST; | |
141 | } | |
142 | ||
143 | #if 0 | |
144 | static int asd_clear_nexus_I_T(struct domain_device *dev) | |
145 | { | |
146 | struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha; | |
147 | struct asd_ascb *ascb; | |
148 | struct scb *scb; | |
149 | int res; | |
150 | ||
151 | CLEAR_NEXUS_PRE; | |
152 | scb->clear_nexus.nexus = NEXUS_I_T; | |
153 | scb->clear_nexus.flags = SEND_Q | EXEC_Q | NOTINQ; | |
154 | if (dev->tproto) | |
155 | scb->clear_nexus.flags |= SUSPEND_TX; | |
156 | scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long) | |
157 | dev->lldd_dev); | |
158 | CLEAR_NEXUS_POST; | |
159 | } | |
160 | #endif | |
161 | ||
162 | static int asd_clear_nexus_I_T_L(struct domain_device *dev, u8 *lun) | |
163 | { | |
164 | struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha; | |
165 | struct asd_ascb *ascb; | |
166 | struct scb *scb; | |
167 | int res; | |
168 | ||
169 | CLEAR_NEXUS_PRE; | |
170 | scb->clear_nexus.nexus = NEXUS_I_T_L; | |
171 | scb->clear_nexus.flags = SEND_Q | EXEC_Q | NOTINQ; | |
172 | if (dev->tproto) | |
173 | scb->clear_nexus.flags |= SUSPEND_TX; | |
174 | memcpy(scb->clear_nexus.ssp_task.lun, lun, 8); | |
175 | scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long) | |
176 | dev->lldd_dev); | |
177 | CLEAR_NEXUS_POST; | |
178 | } | |
179 | ||
180 | static int asd_clear_nexus_tag(struct sas_task *task) | |
181 | { | |
182 | struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha; | |
183 | struct asd_ascb *tascb = task->lldd_task; | |
184 | struct asd_ascb *ascb; | |
185 | struct scb *scb; | |
186 | int res; | |
187 | ||
188 | CLEAR_NEXUS_PRE; | |
189 | scb->clear_nexus.nexus = NEXUS_TAG; | |
190 | memcpy(scb->clear_nexus.ssp_task.lun, task->ssp_task.LUN, 8); | |
191 | scb->clear_nexus.ssp_task.tag = tascb->tag; | |
192 | if (task->dev->tproto) | |
193 | scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long) | |
194 | task->dev->lldd_dev); | |
195 | CLEAR_NEXUS_POST; | |
196 | } | |
197 | ||
198 | static int asd_clear_nexus_index(struct sas_task *task) | |
199 | { | |
200 | struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha; | |
201 | struct asd_ascb *tascb = task->lldd_task; | |
202 | struct asd_ascb *ascb; | |
203 | struct scb *scb; | |
204 | int res; | |
205 | ||
206 | CLEAR_NEXUS_PRE; | |
207 | scb->clear_nexus.nexus = NEXUS_TRANS_CX; | |
208 | if (task->dev->tproto) | |
209 | scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long) | |
210 | task->dev->lldd_dev); | |
211 | scb->clear_nexus.index = cpu_to_le16(tascb->tc_index); | |
212 | CLEAR_NEXUS_POST; | |
213 | } | |
214 | ||
215 | /* ---------- TMFs ---------- */ | |
216 | ||
217 | static void asd_tmf_timedout(unsigned long data) | |
218 | { | |
219 | struct asd_ascb *ascb = (void *) data; | |
220 | ||
221 | ASD_DPRINTK("tmf timed out\n"); | |
222 | asd_timedout_common(data); | |
223 | ascb->uldd_task = (void *) TMF_RESP_FUNC_FAILED; | |
224 | complete(&ascb->completion); | |
225 | } | |
226 | ||
227 | static int asd_get_tmf_resp_tasklet(struct asd_ascb *ascb, | |
228 | struct done_list_struct *dl) | |
229 | { | |
230 | struct asd_ha_struct *asd_ha = ascb->ha; | |
231 | unsigned long flags; | |
232 | struct tc_resp_sb_struct { | |
233 | __le16 index_escb; | |
234 | u8 len_lsb; | |
235 | u8 flags; | |
236 | } __attribute__ ((packed)) *resp_sb = (void *) dl->status_block; | |
237 | ||
238 | int edb_id = ((resp_sb->flags & 0x70) >> 4)-1; | |
239 | struct asd_ascb *escb; | |
240 | struct asd_dma_tok *edb; | |
241 | struct ssp_frame_hdr *fh; | |
242 | struct ssp_response_iu *ru; | |
243 | int res = TMF_RESP_FUNC_FAILED; | |
244 | ||
245 | ASD_DPRINTK("tmf resp tasklet\n"); | |
246 | ||
247 | spin_lock_irqsave(&asd_ha->seq.tc_index_lock, flags); | |
248 | escb = asd_tc_index_find(&asd_ha->seq, | |
249 | (int)le16_to_cpu(resp_sb->index_escb)); | |
250 | spin_unlock_irqrestore(&asd_ha->seq.tc_index_lock, flags); | |
251 | ||
252 | if (!escb) { | |
253 | ASD_DPRINTK("Uh-oh! No escb for this dl?!\n"); | |
254 | return res; | |
255 | } | |
256 | ||
257 | edb = asd_ha->seq.edb_arr[edb_id + escb->edb_index]; | |
258 | ascb->tag = *(__be16 *)(edb->vaddr+4); | |
259 | fh = edb->vaddr + 16; | |
260 | ru = edb->vaddr + 16 + sizeof(*fh); | |
261 | res = ru->status; | |
262 | if (ru->datapres == 1) /* Response data present */ | |
263 | res = ru->resp_data[3]; | |
264 | #if 0 | |
265 | ascb->tag = fh->tag; | |
266 | #endif | |
267 | ascb->tag_valid = 1; | |
268 | ||
269 | asd_invalidate_edb(escb, edb_id); | |
270 | return res; | |
271 | } | |
272 | ||
273 | static void asd_tmf_tasklet_complete(struct asd_ascb *ascb, | |
274 | struct done_list_struct *dl) | |
275 | { | |
276 | if (!del_timer(&ascb->timer)) | |
277 | return; | |
278 | ||
279 | ASD_DPRINTK("tmf tasklet complete\n"); | |
280 | ||
281 | if (dl->opcode == TC_SSP_RESP) | |
282 | ascb->uldd_task = (void *) (unsigned long) | |
283 | asd_get_tmf_resp_tasklet(ascb, dl); | |
284 | else | |
285 | ascb->uldd_task = (void *) 0xFF00 + (unsigned long) dl->opcode; | |
286 | ||
287 | complete(&ascb->completion); | |
288 | } | |
289 | ||
290 | static inline int asd_clear_nexus(struct sas_task *task) | |
291 | { | |
292 | int res = TMF_RESP_FUNC_FAILED; | |
293 | struct asd_ascb *tascb = task->lldd_task; | |
294 | unsigned long flags; | |
295 | ||
296 | ASD_DPRINTK("task not done, clearing nexus\n"); | |
297 | if (tascb->tag_valid) | |
298 | res = asd_clear_nexus_tag(task); | |
299 | else | |
300 | res = asd_clear_nexus_index(task); | |
301 | wait_for_completion_timeout(&tascb->completion, | |
302 | AIC94XX_SCB_TIMEOUT); | |
303 | ASD_DPRINTK("came back from clear nexus\n"); | |
304 | spin_lock_irqsave(&task->task_state_lock, flags); | |
305 | if (task->task_state_flags & SAS_TASK_STATE_DONE) | |
306 | res = TMF_RESP_FUNC_COMPLETE; | |
307 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
308 | ||
309 | return res; | |
310 | } | |
311 | ||
312 | /** | |
313 | * asd_abort_task -- ABORT TASK TMF | |
314 | * @task: the task to be aborted | |
315 | * | |
316 | * Before calling ABORT TASK the task state flags should be ORed with | |
317 | * SAS_TASK_STATE_ABORTED (unless SAS_TASK_STATE_DONE is set) under | |
318 | * the task_state_lock IRQ spinlock, then ABORT TASK *must* be called. | |
319 | * | |
320 | * Implements the ABORT TASK TMF, I_T_L_Q nexus. | |
321 | * Returns: SAS TMF responses (see sas_task.h), | |
322 | * -ENOMEM, | |
323 | * -SAS_QUEUE_FULL. | |
324 | * | |
325 | * When ABORT TASK returns, the caller of ABORT TASK checks first the | |
326 | * task->task_state_flags, and then the return value of ABORT TASK. | |
327 | * | |
328 | * If the task has task state bit SAS_TASK_STATE_DONE set, then the | |
329 | * task was completed successfully prior to it being aborted. The | |
330 | * caller of ABORT TASK has responsibility to call task->task_done() | |
331 | * xor free the task, depending on their framework. The return code | |
332 | * is TMF_RESP_FUNC_FAILED in this case. | |
333 | * | |
334 | * Else the SAS_TASK_STATE_DONE bit is not set, | |
335 | * If the return code is TMF_RESP_FUNC_COMPLETE, then | |
336 | * the task was aborted successfully. The caller of | |
337 | * ABORT TASK has responsibility to call task->task_done() | |
338 | * to finish the task, xor free the task depending on their | |
339 | * framework. | |
340 | * else | |
341 | * the ABORT TASK returned some kind of error. The task | |
342 | * was _not_ cancelled. Nothing can be assumed. | |
343 | * The caller of ABORT TASK may wish to retry. | |
344 | */ | |
345 | int asd_abort_task(struct sas_task *task) | |
346 | { | |
347 | struct asd_ascb *tascb = task->lldd_task; | |
348 | struct asd_ha_struct *asd_ha = tascb->ha; | |
349 | int res = 1; | |
350 | unsigned long flags; | |
351 | struct asd_ascb *ascb = NULL; | |
352 | struct scb *scb; | |
353 | ||
354 | spin_lock_irqsave(&task->task_state_lock, flags); | |
355 | if (task->task_state_flags & SAS_TASK_STATE_DONE) { | |
356 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
357 | res = TMF_RESP_FUNC_COMPLETE; | |
358 | ASD_DPRINTK("%s: task 0x%p done\n", __FUNCTION__, task); | |
359 | goto out_done; | |
360 | } | |
361 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
362 | ||
363 | ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL); | |
364 | if (!ascb) | |
365 | return -ENOMEM; | |
366 | scb = ascb->scb; | |
367 | ||
368 | scb->header.opcode = ABORT_TASK; | |
369 | ||
370 | switch (task->task_proto) { | |
371 | case SATA_PROTO: | |
372 | case SAS_PROTO_STP: | |
373 | scb->abort_task.proto_conn_rate = (1 << 5); /* STP */ | |
374 | break; | |
375 | case SAS_PROTO_SSP: | |
376 | scb->abort_task.proto_conn_rate = (1 << 4); /* SSP */ | |
377 | scb->abort_task.proto_conn_rate |= task->dev->linkrate; | |
378 | break; | |
379 | case SAS_PROTO_SMP: | |
380 | break; | |
381 | default: | |
382 | break; | |
383 | } | |
384 | ||
385 | if (task->task_proto == SAS_PROTO_SSP) { | |
386 | scb->abort_task.ssp_frame.frame_type = SSP_TASK; | |
387 | memcpy(scb->abort_task.ssp_frame.hashed_dest_addr, | |
388 | task->dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); | |
389 | memcpy(scb->abort_task.ssp_frame.hashed_src_addr, | |
390 | task->dev->port->ha->hashed_sas_addr, | |
391 | HASHED_SAS_ADDR_SIZE); | |
392 | scb->abort_task.ssp_frame.tptt = cpu_to_be16(0xFFFF); | |
393 | ||
394 | memcpy(scb->abort_task.ssp_task.lun, task->ssp_task.LUN, 8); | |
395 | scb->abort_task.ssp_task.tmf = TMF_ABORT_TASK; | |
396 | scb->abort_task.ssp_task.tag = cpu_to_be16(0xFFFF); | |
397 | } | |
398 | ||
399 | scb->abort_task.sister_scb = cpu_to_le16(0xFFFF); | |
400 | scb->abort_task.conn_handle = cpu_to_le16( | |
401 | (u16)(unsigned long)task->dev->lldd_dev); | |
402 | scb->abort_task.retry_count = 1; | |
403 | scb->abort_task.index = cpu_to_le16((u16)tascb->tc_index); | |
404 | scb->abort_task.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST); | |
405 | ||
406 | res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete, | |
407 | asd_tmf_timedout); | |
408 | if (res) | |
409 | goto out; | |
410 | wait_for_completion(&ascb->completion); | |
411 | ASD_DPRINTK("tmf came back\n"); | |
412 | ||
413 | res = (int) (unsigned long) ascb->uldd_task; | |
414 | tascb->tag = ascb->tag; | |
415 | tascb->tag_valid = ascb->tag_valid; | |
416 | ||
417 | spin_lock_irqsave(&task->task_state_lock, flags); | |
418 | if (task->task_state_flags & SAS_TASK_STATE_DONE) { | |
419 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
420 | res = TMF_RESP_FUNC_COMPLETE; | |
421 | ASD_DPRINTK("%s: task 0x%p done\n", __FUNCTION__, task); | |
422 | goto out_done; | |
423 | } | |
424 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
425 | ||
426 | switch (res) { | |
427 | /* The task to be aborted has been sent to the device. | |
428 | * We got a Response IU for the ABORT TASK TMF. */ | |
429 | case TC_NO_ERROR + 0xFF00: | |
430 | case TMF_RESP_FUNC_COMPLETE: | |
431 | case TMF_RESP_FUNC_FAILED: | |
432 | res = asd_clear_nexus(task); | |
433 | break; | |
434 | case TMF_RESP_INVALID_FRAME: | |
435 | case TMF_RESP_OVERLAPPED_TAG: | |
436 | case TMF_RESP_FUNC_ESUPP: | |
437 | case TMF_RESP_NO_LUN: | |
438 | goto out_done; break; | |
439 | } | |
440 | /* In the following we assume that the managing layer | |
441 | * will _never_ make a mistake, when issuing ABORT TASK. | |
442 | */ | |
443 | switch (res) { | |
444 | default: | |
445 | res = asd_clear_nexus(task); | |
446 | /* fallthrough */ | |
447 | case TC_NO_ERROR + 0xFF00: | |
448 | case TMF_RESP_FUNC_COMPLETE: | |
449 | break; | |
450 | /* The task hasn't been sent to the device xor we never got | |
451 | * a (sane) Response IU for the ABORT TASK TMF. | |
452 | */ | |
453 | case TF_NAK_RECV + 0xFF00: | |
454 | res = TMF_RESP_INVALID_FRAME; | |
455 | break; | |
456 | case TF_TMF_TASK_DONE + 0xFF00: /* done but not reported yet */ | |
457 | res = TMF_RESP_FUNC_FAILED; | |
458 | wait_for_completion_timeout(&tascb->completion, | |
459 | AIC94XX_SCB_TIMEOUT); | |
460 | spin_lock_irqsave(&task->task_state_lock, flags); | |
461 | if (task->task_state_flags & SAS_TASK_STATE_DONE) | |
462 | res = TMF_RESP_FUNC_COMPLETE; | |
463 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
464 | goto out_done; | |
465 | case TF_TMF_NO_TAG + 0xFF00: | |
466 | case TF_TMF_TAG_FREE + 0xFF00: /* the tag is in the free list */ | |
467 | case TF_TMF_NO_CONN_HANDLE + 0xFF00: /* no such device */ | |
468 | res = TMF_RESP_FUNC_COMPLETE; | |
469 | goto out_done; | |
470 | case TF_TMF_NO_CTX + 0xFF00: /* not in seq, or proto != SSP */ | |
471 | res = TMF_RESP_FUNC_ESUPP; | |
472 | goto out; | |
473 | } | |
474 | out_done: | |
475 | if (res == TMF_RESP_FUNC_COMPLETE) { | |
476 | task->lldd_task = NULL; | |
477 | mb(); | |
478 | asd_ascb_free(tascb); | |
479 | } | |
480 | out: | |
481 | asd_ascb_free(ascb); | |
482 | ASD_DPRINTK("task 0x%p aborted, res: 0x%x\n", task, res); | |
483 | return res; | |
484 | } | |
485 | ||
486 | /** | |
487 | * asd_initiate_ssp_tmf -- send a TMF to an I_T_L or I_T_L_Q nexus | |
488 | * @dev: pointer to struct domain_device of interest | |
489 | * @lun: pointer to u8[8] which is the LUN | |
490 | * @tmf: the TMF to be performed (see sas_task.h or the SAS spec) | |
491 | * @index: the transaction context of the task to be queried if QT TMF | |
492 | * | |
493 | * This function is used to send ABORT TASK SET, CLEAR ACA, | |
494 | * CLEAR TASK SET, LU RESET and QUERY TASK TMFs. | |
495 | * | |
496 | * No SCBs should be queued to the I_T_L nexus when this SCB is | |
497 | * pending. | |
498 | * | |
499 | * Returns: TMF response code (see sas_task.h or the SAS spec) | |
500 | */ | |
501 | static int asd_initiate_ssp_tmf(struct domain_device *dev, u8 *lun, | |
502 | int tmf, int index) | |
503 | { | |
504 | struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha; | |
505 | struct asd_ascb *ascb; | |
506 | int res = 1; | |
507 | struct scb *scb; | |
508 | ||
509 | if (!(dev->tproto & SAS_PROTO_SSP)) | |
510 | return TMF_RESP_FUNC_ESUPP; | |
511 | ||
512 | ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL); | |
513 | if (!ascb) | |
514 | return -ENOMEM; | |
515 | scb = ascb->scb; | |
516 | ||
517 | if (tmf == TMF_QUERY_TASK) | |
518 | scb->header.opcode = QUERY_SSP_TASK; | |
519 | else | |
520 | scb->header.opcode = INITIATE_SSP_TMF; | |
521 | ||
522 | scb->ssp_tmf.proto_conn_rate = (1 << 4); /* SSP */ | |
523 | scb->ssp_tmf.proto_conn_rate |= dev->linkrate; | |
524 | /* SSP frame header */ | |
525 | scb->ssp_tmf.ssp_frame.frame_type = SSP_TASK; | |
526 | memcpy(scb->ssp_tmf.ssp_frame.hashed_dest_addr, | |
527 | dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); | |
528 | memcpy(scb->ssp_tmf.ssp_frame.hashed_src_addr, | |
529 | dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); | |
530 | scb->ssp_tmf.ssp_frame.tptt = cpu_to_be16(0xFFFF); | |
531 | /* SSP Task IU */ | |
532 | memcpy(scb->ssp_tmf.ssp_task.lun, lun, 8); | |
533 | scb->ssp_tmf.ssp_task.tmf = tmf; | |
534 | ||
535 | scb->ssp_tmf.sister_scb = cpu_to_le16(0xFFFF); | |
536 | scb->ssp_tmf.conn_handle= cpu_to_le16((u16)(unsigned long) | |
537 | dev->lldd_dev); | |
538 | scb->ssp_tmf.retry_count = 1; | |
539 | scb->ssp_tmf.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST); | |
540 | if (tmf == TMF_QUERY_TASK) | |
541 | scb->ssp_tmf.index = cpu_to_le16(index); | |
542 | ||
543 | res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete, | |
544 | asd_tmf_timedout); | |
545 | if (res) | |
546 | goto out_err; | |
547 | wait_for_completion(&ascb->completion); | |
548 | res = (int) (unsigned long) ascb->uldd_task; | |
549 | ||
550 | switch (res) { | |
551 | case TC_NO_ERROR + 0xFF00: | |
552 | res = TMF_RESP_FUNC_COMPLETE; | |
553 | break; | |
554 | case TF_NAK_RECV + 0xFF00: | |
555 | res = TMF_RESP_INVALID_FRAME; | |
556 | break; | |
557 | case TF_TMF_TASK_DONE + 0xFF00: | |
558 | res = TMF_RESP_FUNC_FAILED; | |
559 | break; | |
560 | case TF_TMF_NO_TAG + 0xFF00: | |
561 | case TF_TMF_TAG_FREE + 0xFF00: /* the tag is in the free list */ | |
562 | case TF_TMF_NO_CONN_HANDLE + 0xFF00: /* no such device */ | |
563 | res = TMF_RESP_FUNC_COMPLETE; | |
564 | break; | |
565 | case TF_TMF_NO_CTX + 0xFF00: /* not in seq, or proto != SSP */ | |
566 | res = TMF_RESP_FUNC_ESUPP; | |
567 | break; | |
568 | default: | |
058e2c47 | 569 | /* Allow TMF response codes to propagate upwards */ |
2908d778 JB |
570 | break; |
571 | } | |
572 | out_err: | |
573 | asd_ascb_free(ascb); | |
574 | return res; | |
575 | } | |
576 | ||
577 | int asd_abort_task_set(struct domain_device *dev, u8 *lun) | |
578 | { | |
579 | int res = asd_initiate_ssp_tmf(dev, lun, TMF_ABORT_TASK_SET, 0); | |
580 | ||
581 | if (res == TMF_RESP_FUNC_COMPLETE) | |
582 | asd_clear_nexus_I_T_L(dev, lun); | |
583 | return res; | |
584 | } | |
585 | ||
586 | int asd_clear_aca(struct domain_device *dev, u8 *lun) | |
587 | { | |
588 | int res = asd_initiate_ssp_tmf(dev, lun, TMF_CLEAR_ACA, 0); | |
589 | ||
590 | if (res == TMF_RESP_FUNC_COMPLETE) | |
591 | asd_clear_nexus_I_T_L(dev, lun); | |
592 | return res; | |
593 | } | |
594 | ||
595 | int asd_clear_task_set(struct domain_device *dev, u8 *lun) | |
596 | { | |
597 | int res = asd_initiate_ssp_tmf(dev, lun, TMF_CLEAR_TASK_SET, 0); | |
598 | ||
599 | if (res == TMF_RESP_FUNC_COMPLETE) | |
600 | asd_clear_nexus_I_T_L(dev, lun); | |
601 | return res; | |
602 | } | |
603 | ||
604 | int asd_lu_reset(struct domain_device *dev, u8 *lun) | |
605 | { | |
606 | int res = asd_initiate_ssp_tmf(dev, lun, TMF_LU_RESET, 0); | |
607 | ||
608 | if (res == TMF_RESP_FUNC_COMPLETE) | |
609 | asd_clear_nexus_I_T_L(dev, lun); | |
610 | return res; | |
611 | } | |
612 | ||
613 | /** | |
614 | * asd_query_task -- send a QUERY TASK TMF to an I_T_L_Q nexus | |
615 | * task: pointer to sas_task struct of interest | |
616 | * | |
617 | * Returns: TMF_RESP_FUNC_COMPLETE if the task is not in the task set, | |
618 | * or TMF_RESP_FUNC_SUCC if the task is in the task set. | |
619 | * | |
620 | * Normally the management layer sets the task to aborted state, | |
621 | * and then calls query task and then abort task. | |
622 | */ | |
623 | int asd_query_task(struct sas_task *task) | |
624 | { | |
625 | struct asd_ascb *ascb = task->lldd_task; | |
626 | int index; | |
627 | ||
628 | if (ascb) { | |
629 | index = ascb->tc_index; | |
630 | return asd_initiate_ssp_tmf(task->dev, task->ssp_task.LUN, | |
631 | TMF_QUERY_TASK, index); | |
632 | } | |
633 | return TMF_RESP_FUNC_COMPLETE; | |
634 | } |