2 * Aic94xx Task Management Functions
4 * Copyright (C) 2005 Adaptec, Inc. All rights reserved.
5 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
7 * This file is licensed under GPLv2.
9 * This file is part of the aic94xx driver.
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
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.
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
27 #include <linux/spinlock.h>
29 #include "aic94xx_sas.h"
30 #include "aic94xx_hwi.h"
32 /* ---------- Internal enqueue ---------- */
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))
41 ascb->tasklet_complete = tasklet_complete;
44 ascb->timer.data = (unsigned long) ascb;
45 ascb->timer.function = timed_out;
46 ascb->timer.expires = jiffies + AIC94XX_SCB_TIMEOUT;
48 add_timer(&ascb->timer);
50 res = asd_post_ascb_list(ascb->ha, ascb, 1);
52 del_timer(&ascb->timer);
56 static inline void asd_timedout_common(unsigned long data)
58 struct asd_ascb *ascb = (void *) data;
59 struct asd_seq_data *seq = &ascb->ha->seq;
62 spin_lock_irqsave(&seq->pend_q_lock, flags);
64 list_del_init(&ascb->list);
65 spin_unlock_irqrestore(&seq->pend_q_lock, flags);
68 /* ---------- CLEAR NEXUS ---------- */
70 static void asd_clear_nexus_tasklet_complete(struct asd_ascb *ascb,
71 struct done_list_struct *dl)
73 ASD_DPRINTK("%s: here\n", __FUNCTION__);
74 if (!del_timer(&ascb->timer)) {
75 ASD_DPRINTK("%s: couldn't delete timer\n", __FUNCTION__);
78 ASD_DPRINTK("%s: opcode: 0x%x\n", __FUNCTION__, dl->opcode);
79 ascb->uldd_task = (void *) (unsigned long) dl->opcode;
80 complete(&ascb->completion);
83 static void asd_clear_nexus_timedout(unsigned long data)
85 struct asd_ascb *ascb = (void *) data;
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);
93 #define CLEAR_NEXUS_PRE \
94 ASD_DPRINTK("%s: PRE\n", __FUNCTION__); \
96 ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL); \
101 scb->header.opcode = CLEAR_NEXUS
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); \
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; \
115 asd_ascb_free(ascb); \
118 int asd_clear_nexus_ha(struct sas_ha_struct *sas_ha)
120 struct asd_ha_struct *asd_ha = sas_ha->lldd_ha;
121 struct asd_ascb *ascb;
126 scb->clear_nexus.nexus = NEXUS_ADAPTER;
130 int asd_clear_nexus_port(struct asd_sas_port *port)
132 struct asd_ha_struct *asd_ha = port->ha->lldd_ha;
133 struct asd_ascb *ascb;
138 scb->clear_nexus.nexus = NEXUS_PORT;
139 scb->clear_nexus.conn_mask = port->phy_mask;
144 static int asd_clear_nexus_I_T(struct domain_device *dev)
146 struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
147 struct asd_ascb *ascb;
152 scb->clear_nexus.nexus = NEXUS_I_T;
153 scb->clear_nexus.flags = SEND_Q | EXEC_Q | NOTINQ;
155 scb->clear_nexus.flags |= SUSPEND_TX;
156 scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long)
162 static int asd_clear_nexus_I_T_L(struct domain_device *dev, u8 *lun)
164 struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
165 struct asd_ascb *ascb;
170 scb->clear_nexus.nexus = NEXUS_I_T_L;
171 scb->clear_nexus.flags = SEND_Q | EXEC_Q | NOTINQ;
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)
180 static int asd_clear_nexus_tag(struct sas_task *task)
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;
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);
198 static int asd_clear_nexus_index(struct sas_task *task)
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;
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);
215 /* ---------- TMFs ---------- */
217 static void asd_tmf_timedout(unsigned long data)
219 struct asd_ascb *ascb = (void *) data;
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);
227 static int asd_get_tmf_resp_tasklet(struct asd_ascb *ascb,
228 struct done_list_struct *dl)
230 struct asd_ha_struct *asd_ha = ascb->ha;
232 struct tc_resp_sb_struct {
236 } __attribute__ ((packed)) *resp_sb = (void *) dl->status_block;
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;
245 ASD_DPRINTK("tmf resp tasklet\n");
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);
253 ASD_DPRINTK("Uh-oh! No escb for this dl?!\n");
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);
262 if (ru->datapres == 1) /* Response data present */
263 res = ru->resp_data[3];
269 asd_invalidate_edb(escb, edb_id);
273 static void asd_tmf_tasklet_complete(struct asd_ascb *ascb,
274 struct done_list_struct *dl)
276 if (!del_timer(&ascb->timer))
279 ASD_DPRINTK("tmf tasklet complete\n");
281 if (dl->opcode == TC_SSP_RESP)
282 ascb->uldd_task = (void *) (unsigned long)
283 asd_get_tmf_resp_tasklet(ascb, dl);
285 ascb->uldd_task = (void *) 0xFF00 + (unsigned long) dl->opcode;
287 complete(&ascb->completion);
290 static inline int asd_clear_nexus(struct sas_task *task)
292 int res = TMF_RESP_FUNC_FAILED;
294 struct asd_ascb *tascb = task->lldd_task;
297 ASD_DPRINTK("task not done, clearing nexus\n");
298 if (tascb->tag_valid)
299 res = asd_clear_nexus_tag(task);
301 res = asd_clear_nexus_index(task);
302 leftover = wait_for_completion_timeout(&tascb->completion,
303 AIC94XX_SCB_TIMEOUT);
304 ASD_DPRINTK("came back from clear nexus\n");
305 spin_lock_irqsave(&task->task_state_lock, flags);
307 res = TMF_RESP_FUNC_FAILED;
308 if (task->task_state_flags & SAS_TASK_STATE_DONE)
309 res = TMF_RESP_FUNC_COMPLETE;
310 spin_unlock_irqrestore(&task->task_state_lock, flags);
316 * asd_abort_task -- ABORT TASK TMF
317 * @task: the task to be aborted
319 * Before calling ABORT TASK the task state flags should be ORed with
320 * SAS_TASK_STATE_ABORTED (unless SAS_TASK_STATE_DONE is set) under
321 * the task_state_lock IRQ spinlock, then ABORT TASK *must* be called.
323 * Implements the ABORT TASK TMF, I_T_L_Q nexus.
324 * Returns: SAS TMF responses (see sas_task.h),
328 * When ABORT TASK returns, the caller of ABORT TASK checks first the
329 * task->task_state_flags, and then the return value of ABORT TASK.
331 * If the task has task state bit SAS_TASK_STATE_DONE set, then the
332 * task was completed successfully prior to it being aborted. The
333 * caller of ABORT TASK has responsibility to call task->task_done()
334 * xor free the task, depending on their framework. The return code
335 * is TMF_RESP_FUNC_FAILED in this case.
337 * Else the SAS_TASK_STATE_DONE bit is not set,
338 * If the return code is TMF_RESP_FUNC_COMPLETE, then
339 * the task was aborted successfully. The caller of
340 * ABORT TASK has responsibility to call task->task_done()
341 * to finish the task, xor free the task depending on their
344 * the ABORT TASK returned some kind of error. The task
345 * was _not_ cancelled. Nothing can be assumed.
346 * The caller of ABORT TASK may wish to retry.
348 int asd_abort_task(struct sas_task *task)
350 struct asd_ascb *tascb = task->lldd_task;
351 struct asd_ha_struct *asd_ha = tascb->ha;
354 struct asd_ascb *ascb = NULL;
358 spin_lock_irqsave(&task->task_state_lock, flags);
359 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
360 spin_unlock_irqrestore(&task->task_state_lock, flags);
361 res = TMF_RESP_FUNC_COMPLETE;
362 ASD_DPRINTK("%s: task 0x%p done\n", __FUNCTION__, task);
365 spin_unlock_irqrestore(&task->task_state_lock, flags);
367 ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL);
372 scb->header.opcode = ABORT_TASK;
374 switch (task->task_proto) {
377 scb->abort_task.proto_conn_rate = (1 << 5); /* STP */
380 scb->abort_task.proto_conn_rate = (1 << 4); /* SSP */
381 scb->abort_task.proto_conn_rate |= task->dev->linkrate;
389 if (task->task_proto == SAS_PROTO_SSP) {
390 scb->abort_task.ssp_frame.frame_type = SSP_TASK;
391 memcpy(scb->abort_task.ssp_frame.hashed_dest_addr,
392 task->dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
393 memcpy(scb->abort_task.ssp_frame.hashed_src_addr,
394 task->dev->port->ha->hashed_sas_addr,
395 HASHED_SAS_ADDR_SIZE);
396 scb->abort_task.ssp_frame.tptt = cpu_to_be16(0xFFFF);
398 memcpy(scb->abort_task.ssp_task.lun, task->ssp_task.LUN, 8);
399 scb->abort_task.ssp_task.tmf = TMF_ABORT_TASK;
400 scb->abort_task.ssp_task.tag = cpu_to_be16(0xFFFF);
403 scb->abort_task.sister_scb = cpu_to_le16(0xFFFF);
404 scb->abort_task.conn_handle = cpu_to_le16(
405 (u16)(unsigned long)task->dev->lldd_dev);
406 scb->abort_task.retry_count = 1;
407 scb->abort_task.index = cpu_to_le16((u16)tascb->tc_index);
408 scb->abort_task.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST);
410 res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete,
414 wait_for_completion(&ascb->completion);
415 ASD_DPRINTK("tmf came back\n");
417 res = (int) (unsigned long) ascb->uldd_task;
418 tascb->tag = ascb->tag;
419 tascb->tag_valid = ascb->tag_valid;
421 spin_lock_irqsave(&task->task_state_lock, flags);
422 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
423 spin_unlock_irqrestore(&task->task_state_lock, flags);
424 res = TMF_RESP_FUNC_COMPLETE;
425 ASD_DPRINTK("%s: task 0x%p done\n", __FUNCTION__, task);
428 spin_unlock_irqrestore(&task->task_state_lock, flags);
431 /* The task to be aborted has been sent to the device.
432 * We got a Response IU for the ABORT TASK TMF. */
433 case TC_NO_ERROR + 0xFF00:
434 case TMF_RESP_FUNC_COMPLETE:
435 case TMF_RESP_FUNC_FAILED:
436 res = asd_clear_nexus(task);
438 case TMF_RESP_INVALID_FRAME:
439 case TMF_RESP_OVERLAPPED_TAG:
440 case TMF_RESP_FUNC_ESUPP:
441 case TMF_RESP_NO_LUN:
442 goto out_done; break;
444 /* In the following we assume that the managing layer
445 * will _never_ make a mistake, when issuing ABORT TASK.
449 res = asd_clear_nexus(task);
451 case TC_NO_ERROR + 0xFF00:
452 case TMF_RESP_FUNC_COMPLETE:
454 /* The task hasn't been sent to the device xor we never got
455 * a (sane) Response IU for the ABORT TASK TMF.
457 case TF_NAK_RECV + 0xFF00:
458 res = TMF_RESP_INVALID_FRAME;
460 case TF_TMF_TASK_DONE + 0xFF00: /* done but not reported yet */
461 res = TMF_RESP_FUNC_FAILED;
462 leftover = wait_for_completion_timeout(&tascb->completion,
463 AIC94XX_SCB_TIMEOUT);
464 spin_lock_irqsave(&task->task_state_lock, flags);
466 res = TMF_RESP_FUNC_FAILED;
467 if (task->task_state_flags & SAS_TASK_STATE_DONE)
468 res = TMF_RESP_FUNC_COMPLETE;
469 spin_unlock_irqrestore(&task->task_state_lock, flags);
471 case TF_TMF_NO_TAG + 0xFF00:
472 case TF_TMF_TAG_FREE + 0xFF00: /* the tag is in the free list */
473 case TF_TMF_NO_CONN_HANDLE + 0xFF00: /* no such device */
474 res = TMF_RESP_FUNC_COMPLETE;
476 case TF_TMF_NO_CTX + 0xFF00: /* not in seq, or proto != SSP */
477 res = TMF_RESP_FUNC_ESUPP;
481 if (res == TMF_RESP_FUNC_COMPLETE) {
482 task->lldd_task = NULL;
484 asd_ascb_free(tascb);
488 ASD_DPRINTK("task 0x%p aborted, res: 0x%x\n", task, res);
493 * asd_initiate_ssp_tmf -- send a TMF to an I_T_L or I_T_L_Q nexus
494 * @dev: pointer to struct domain_device of interest
495 * @lun: pointer to u8[8] which is the LUN
496 * @tmf: the TMF to be performed (see sas_task.h or the SAS spec)
497 * @index: the transaction context of the task to be queried if QT TMF
499 * This function is used to send ABORT TASK SET, CLEAR ACA,
500 * CLEAR TASK SET, LU RESET and QUERY TASK TMFs.
502 * No SCBs should be queued to the I_T_L nexus when this SCB is
505 * Returns: TMF response code (see sas_task.h or the SAS spec)
507 static int asd_initiate_ssp_tmf(struct domain_device *dev, u8 *lun,
510 struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha;
511 struct asd_ascb *ascb;
515 if (!(dev->tproto & SAS_PROTO_SSP))
516 return TMF_RESP_FUNC_ESUPP;
518 ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL);
523 if (tmf == TMF_QUERY_TASK)
524 scb->header.opcode = QUERY_SSP_TASK;
526 scb->header.opcode = INITIATE_SSP_TMF;
528 scb->ssp_tmf.proto_conn_rate = (1 << 4); /* SSP */
529 scb->ssp_tmf.proto_conn_rate |= dev->linkrate;
530 /* SSP frame header */
531 scb->ssp_tmf.ssp_frame.frame_type = SSP_TASK;
532 memcpy(scb->ssp_tmf.ssp_frame.hashed_dest_addr,
533 dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
534 memcpy(scb->ssp_tmf.ssp_frame.hashed_src_addr,
535 dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
536 scb->ssp_tmf.ssp_frame.tptt = cpu_to_be16(0xFFFF);
538 memcpy(scb->ssp_tmf.ssp_task.lun, lun, 8);
539 scb->ssp_tmf.ssp_task.tmf = tmf;
541 scb->ssp_tmf.sister_scb = cpu_to_le16(0xFFFF);
542 scb->ssp_tmf.conn_handle= cpu_to_le16((u16)(unsigned long)
544 scb->ssp_tmf.retry_count = 1;
545 scb->ssp_tmf.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST);
546 if (tmf == TMF_QUERY_TASK)
547 scb->ssp_tmf.index = cpu_to_le16(index);
549 res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete,
553 wait_for_completion(&ascb->completion);
554 res = (int) (unsigned long) ascb->uldd_task;
557 case TC_NO_ERROR + 0xFF00:
558 res = TMF_RESP_FUNC_COMPLETE;
560 case TF_NAK_RECV + 0xFF00:
561 res = TMF_RESP_INVALID_FRAME;
563 case TF_TMF_TASK_DONE + 0xFF00:
564 res = TMF_RESP_FUNC_FAILED;
566 case TF_TMF_NO_TAG + 0xFF00:
567 case TF_TMF_TAG_FREE + 0xFF00: /* the tag is in the free list */
568 case TF_TMF_NO_CONN_HANDLE + 0xFF00: /* no such device */
569 res = TMF_RESP_FUNC_COMPLETE;
571 case TF_TMF_NO_CTX + 0xFF00: /* not in seq, or proto != SSP */
572 res = TMF_RESP_FUNC_ESUPP;
575 /* Allow TMF response codes to propagate upwards */
583 int asd_abort_task_set(struct domain_device *dev, u8 *lun)
585 int res = asd_initiate_ssp_tmf(dev, lun, TMF_ABORT_TASK_SET, 0);
587 if (res == TMF_RESP_FUNC_COMPLETE)
588 asd_clear_nexus_I_T_L(dev, lun);
592 int asd_clear_aca(struct domain_device *dev, u8 *lun)
594 int res = asd_initiate_ssp_tmf(dev, lun, TMF_CLEAR_ACA, 0);
596 if (res == TMF_RESP_FUNC_COMPLETE)
597 asd_clear_nexus_I_T_L(dev, lun);
601 int asd_clear_task_set(struct domain_device *dev, u8 *lun)
603 int res = asd_initiate_ssp_tmf(dev, lun, TMF_CLEAR_TASK_SET, 0);
605 if (res == TMF_RESP_FUNC_COMPLETE)
606 asd_clear_nexus_I_T_L(dev, lun);
610 int asd_lu_reset(struct domain_device *dev, u8 *lun)
612 int res = asd_initiate_ssp_tmf(dev, lun, TMF_LU_RESET, 0);
614 if (res == TMF_RESP_FUNC_COMPLETE)
615 asd_clear_nexus_I_T_L(dev, lun);
620 * asd_query_task -- send a QUERY TASK TMF to an I_T_L_Q nexus
621 * task: pointer to sas_task struct of interest
623 * Returns: TMF_RESP_FUNC_COMPLETE if the task is not in the task set,
624 * or TMF_RESP_FUNC_SUCC if the task is in the task set.
626 * Normally the management layer sets the task to aborted state,
627 * and then calls query task and then abort task.
629 int asd_query_task(struct sas_task *task)
631 struct asd_ascb *ascb = task->lldd_task;
635 index = ascb->tc_index;
636 return asd_initiate_ssp_tmf(task->dev, task->ssp_task.LUN,
637 TMF_QUERY_TASK, index);
639 return TMF_RESP_FUNC_COMPLETE;