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Commit | Line | Data |
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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> | |
5a0e3ad6 | 28 | #include <linux/gfp.h> |
2908d778 JB |
29 | #include "aic94xx.h" |
30 | #include "aic94xx_sas.h" | |
31 | #include "aic94xx_hwi.h" | |
32 | ||
33 | /* ---------- Internal enqueue ---------- */ | |
34 | ||
35 | static int asd_enqueue_internal(struct asd_ascb *ascb, | |
36 | void (*tasklet_complete)(struct asd_ascb *, | |
37 | struct done_list_struct *), | |
30199bee | 38 | void (*timed_out)(struct timer_list *t)) |
2908d778 JB |
39 | { |
40 | int res; | |
41 | ||
42 | ascb->tasklet_complete = tasklet_complete; | |
43 | ascb->uldd_timer = 1; | |
44 | ||
841b86f3 | 45 | ascb->timer.function = timed_out; |
2908d778 JB |
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 | ||
e2396f1e | 56 | /* ---------- CLEAR NEXUS ---------- */ |
2908d778 | 57 | |
e2396f1e JB |
58 | struct tasklet_completion_status { |
59 | int dl_opcode; | |
60 | int tmf_state; | |
61 | u8 tag_valid:1; | |
62 | __be16 tag; | |
63 | }; | |
64 | ||
65 | #define DECLARE_TCS(tcs) \ | |
66 | struct tasklet_completion_status tcs = { \ | |
67 | .dl_opcode = 0, \ | |
68 | .tmf_state = 0, \ | |
69 | .tag_valid = 0, \ | |
70 | .tag = 0, \ | |
71 | } | |
2908d778 | 72 | |
2908d778 JB |
73 | |
74 | static void asd_clear_nexus_tasklet_complete(struct asd_ascb *ascb, | |
75 | struct done_list_struct *dl) | |
76 | { | |
e2396f1e | 77 | struct tasklet_completion_status *tcs = ascb->uldd_task; |
cadbd4a5 | 78 | ASD_DPRINTK("%s: here\n", __func__); |
2908d778 | 79 | if (!del_timer(&ascb->timer)) { |
cadbd4a5 | 80 | ASD_DPRINTK("%s: couldn't delete timer\n", __func__); |
2908d778 JB |
81 | return; |
82 | } | |
cadbd4a5 | 83 | ASD_DPRINTK("%s: opcode: 0x%x\n", __func__, dl->opcode); |
e2396f1e JB |
84 | tcs->dl_opcode = dl->opcode; |
85 | complete(ascb->completion); | |
86 | asd_ascb_free(ascb); | |
2908d778 JB |
87 | } |
88 | ||
30199bee | 89 | static void asd_clear_nexus_timedout(struct timer_list *t) |
2908d778 | 90 | { |
30199bee | 91 | struct asd_ascb *ascb = from_timer(ascb, t, timer); |
e2396f1e | 92 | struct tasklet_completion_status *tcs = ascb->uldd_task; |
2908d778 | 93 | |
cadbd4a5 | 94 | ASD_DPRINTK("%s: here\n", __func__); |
e2396f1e JB |
95 | tcs->dl_opcode = TMF_RESP_FUNC_FAILED; |
96 | complete(ascb->completion); | |
2908d778 JB |
97 | } |
98 | ||
99 | #define CLEAR_NEXUS_PRE \ | |
e2396f1e JB |
100 | struct asd_ascb *ascb; \ |
101 | struct scb *scb; \ | |
102 | int res; \ | |
103 | DECLARE_COMPLETION_ONSTACK(completion); \ | |
104 | DECLARE_TCS(tcs); \ | |
105 | \ | |
cadbd4a5 | 106 | ASD_DPRINTK("%s: PRE\n", __func__); \ |
2908d778 JB |
107 | res = 1; \ |
108 | ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL); \ | |
109 | if (!ascb) \ | |
110 | return -ENOMEM; \ | |
111 | \ | |
e2396f1e JB |
112 | ascb->completion = &completion; \ |
113 | ascb->uldd_task = &tcs; \ | |
2908d778 JB |
114 | scb = ascb->scb; \ |
115 | scb->header.opcode = CLEAR_NEXUS | |
116 | ||
117 | #define CLEAR_NEXUS_POST \ | |
cadbd4a5 | 118 | ASD_DPRINTK("%s: POST\n", __func__); \ |
2908d778 JB |
119 | res = asd_enqueue_internal(ascb, asd_clear_nexus_tasklet_complete, \ |
120 | asd_clear_nexus_timedout); \ | |
121 | if (res) \ | |
122 | goto out_err; \ | |
cadbd4a5 | 123 | ASD_DPRINTK("%s: clear nexus posted, waiting...\n", __func__); \ |
e2396f1e JB |
124 | wait_for_completion(&completion); \ |
125 | res = tcs.dl_opcode; \ | |
2908d778 JB |
126 | if (res == TC_NO_ERROR) \ |
127 | res = TMF_RESP_FUNC_COMPLETE; \ | |
e2396f1e | 128 | return res; \ |
2908d778 JB |
129 | out_err: \ |
130 | asd_ascb_free(ascb); \ | |
131 | return res | |
132 | ||
133 | int asd_clear_nexus_ha(struct sas_ha_struct *sas_ha) | |
134 | { | |
135 | struct asd_ha_struct *asd_ha = sas_ha->lldd_ha; | |
2908d778 JB |
136 | |
137 | CLEAR_NEXUS_PRE; | |
138 | scb->clear_nexus.nexus = NEXUS_ADAPTER; | |
139 | CLEAR_NEXUS_POST; | |
140 | } | |
141 | ||
142 | int asd_clear_nexus_port(struct asd_sas_port *port) | |
143 | { | |
144 | struct asd_ha_struct *asd_ha = port->ha->lldd_ha; | |
2908d778 JB |
145 | |
146 | CLEAR_NEXUS_PRE; | |
147 | scb->clear_nexus.nexus = NEXUS_PORT; | |
148 | scb->clear_nexus.conn_mask = port->phy_mask; | |
149 | CLEAR_NEXUS_POST; | |
150 | } | |
151 | ||
63edf49e JB |
152 | enum clear_nexus_phase { |
153 | NEXUS_PHASE_PRE, | |
154 | NEXUS_PHASE_POST, | |
155 | NEXUS_PHASE_RESUME, | |
156 | }; | |
157 | ||
158 | static int asd_clear_nexus_I_T(struct domain_device *dev, | |
159 | enum clear_nexus_phase phase) | |
2908d778 JB |
160 | { |
161 | struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha; | |
2908d778 JB |
162 | |
163 | CLEAR_NEXUS_PRE; | |
164 | scb->clear_nexus.nexus = NEXUS_I_T; | |
63edf49e JB |
165 | switch (phase) { |
166 | case NEXUS_PHASE_PRE: | |
167 | scb->clear_nexus.flags = EXEC_Q | SUSPEND_TX; | |
168 | break; | |
169 | case NEXUS_PHASE_POST: | |
170 | scb->clear_nexus.flags = SEND_Q | NOTINQ; | |
171 | break; | |
172 | case NEXUS_PHASE_RESUME: | |
173 | scb->clear_nexus.flags = RESUME_TX; | |
174 | } | |
2908d778 JB |
175 | scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long) |
176 | dev->lldd_dev); | |
177 | CLEAR_NEXUS_POST; | |
178 | } | |
63edf49e JB |
179 | |
180 | int asd_I_T_nexus_reset(struct domain_device *dev) | |
181 | { | |
182 | int res, tmp_res, i; | |
f41a0c44 | 183 | struct sas_phy *phy = sas_get_local_phy(dev); |
63edf49e JB |
184 | /* Standard mandates link reset for ATA (type 0) and |
185 | * hard reset for SSP (type 1) */ | |
aa9f8328 | 186 | int reset_type = (dev->dev_type == SAS_SATA_DEV || |
63edf49e JB |
187 | (dev->tproto & SAS_PROTOCOL_STP)) ? 0 : 1; |
188 | ||
189 | asd_clear_nexus_I_T(dev, NEXUS_PHASE_PRE); | |
190 | /* send a hard reset */ | |
191 | ASD_DPRINTK("sending %s reset to %s\n", | |
71610f55 | 192 | reset_type ? "hard" : "soft", dev_name(&phy->dev)); |
63edf49e | 193 | res = sas_phy_reset(phy, reset_type); |
26a2e68f | 194 | if (res == TMF_RESP_FUNC_COMPLETE || res == -ENODEV) { |
63edf49e JB |
195 | /* wait for the maximum settle time */ |
196 | msleep(500); | |
197 | /* clear all outstanding commands (keep nexus suspended) */ | |
198 | asd_clear_nexus_I_T(dev, NEXUS_PHASE_POST); | |
199 | } | |
200 | for (i = 0 ; i < 3; i++) { | |
201 | tmp_res = asd_clear_nexus_I_T(dev, NEXUS_PHASE_RESUME); | |
202 | if (tmp_res == TC_RESUME) | |
f41a0c44 | 203 | goto out; |
63edf49e JB |
204 | msleep(500); |
205 | } | |
206 | ||
207 | /* This is a bit of a problem: the sequencer is still suspended | |
208 | * and is refusing to resume. Hope it will resume on a bigger hammer | |
209 | * or the disk is lost */ | |
210 | dev_printk(KERN_ERR, &phy->dev, | |
211 | "Failed to resume nexus after reset 0x%x\n", tmp_res); | |
212 | ||
f41a0c44 DW |
213 | res = TMF_RESP_FUNC_FAILED; |
214 | out: | |
215 | sas_put_local_phy(phy); | |
216 | return res; | |
63edf49e | 217 | } |
2908d778 JB |
218 | |
219 | static int asd_clear_nexus_I_T_L(struct domain_device *dev, u8 *lun) | |
220 | { | |
221 | struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha; | |
2908d778 JB |
222 | |
223 | CLEAR_NEXUS_PRE; | |
224 | scb->clear_nexus.nexus = NEXUS_I_T_L; | |
225 | scb->clear_nexus.flags = SEND_Q | EXEC_Q | NOTINQ; | |
2908d778 JB |
226 | memcpy(scb->clear_nexus.ssp_task.lun, lun, 8); |
227 | scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long) | |
228 | dev->lldd_dev); | |
229 | CLEAR_NEXUS_POST; | |
230 | } | |
231 | ||
232 | static int asd_clear_nexus_tag(struct sas_task *task) | |
233 | { | |
234 | struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha; | |
235 | struct asd_ascb *tascb = task->lldd_task; | |
2908d778 JB |
236 | |
237 | CLEAR_NEXUS_PRE; | |
238 | scb->clear_nexus.nexus = NEXUS_TAG; | |
239 | memcpy(scb->clear_nexus.ssp_task.lun, task->ssp_task.LUN, 8); | |
240 | scb->clear_nexus.ssp_task.tag = tascb->tag; | |
241 | if (task->dev->tproto) | |
242 | scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long) | |
243 | task->dev->lldd_dev); | |
244 | CLEAR_NEXUS_POST; | |
245 | } | |
246 | ||
247 | static int asd_clear_nexus_index(struct sas_task *task) | |
248 | { | |
249 | struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha; | |
250 | struct asd_ascb *tascb = task->lldd_task; | |
2908d778 JB |
251 | |
252 | CLEAR_NEXUS_PRE; | |
253 | scb->clear_nexus.nexus = NEXUS_TRANS_CX; | |
254 | if (task->dev->tproto) | |
255 | scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long) | |
256 | task->dev->lldd_dev); | |
257 | scb->clear_nexus.index = cpu_to_le16(tascb->tc_index); | |
258 | CLEAR_NEXUS_POST; | |
259 | } | |
260 | ||
261 | /* ---------- TMFs ---------- */ | |
262 | ||
30199bee | 263 | static void asd_tmf_timedout(struct timer_list *t) |
2908d778 | 264 | { |
30199bee | 265 | struct asd_ascb *ascb = from_timer(ascb, t, timer); |
e2396f1e | 266 | struct tasklet_completion_status *tcs = ascb->uldd_task; |
2908d778 JB |
267 | |
268 | ASD_DPRINTK("tmf timed out\n"); | |
e2396f1e JB |
269 | tcs->tmf_state = TMF_RESP_FUNC_FAILED; |
270 | complete(ascb->completion); | |
2908d778 JB |
271 | } |
272 | ||
273 | static int asd_get_tmf_resp_tasklet(struct asd_ascb *ascb, | |
274 | struct done_list_struct *dl) | |
275 | { | |
276 | struct asd_ha_struct *asd_ha = ascb->ha; | |
277 | unsigned long flags; | |
278 | struct tc_resp_sb_struct { | |
279 | __le16 index_escb; | |
280 | u8 len_lsb; | |
281 | u8 flags; | |
282 | } __attribute__ ((packed)) *resp_sb = (void *) dl->status_block; | |
283 | ||
284 | int edb_id = ((resp_sb->flags & 0x70) >> 4)-1; | |
285 | struct asd_ascb *escb; | |
286 | struct asd_dma_tok *edb; | |
287 | struct ssp_frame_hdr *fh; | |
288 | struct ssp_response_iu *ru; | |
289 | int res = TMF_RESP_FUNC_FAILED; | |
290 | ||
291 | ASD_DPRINTK("tmf resp tasklet\n"); | |
292 | ||
293 | spin_lock_irqsave(&asd_ha->seq.tc_index_lock, flags); | |
294 | escb = asd_tc_index_find(&asd_ha->seq, | |
295 | (int)le16_to_cpu(resp_sb->index_escb)); | |
296 | spin_unlock_irqrestore(&asd_ha->seq.tc_index_lock, flags); | |
297 | ||
298 | if (!escb) { | |
299 | ASD_DPRINTK("Uh-oh! No escb for this dl?!\n"); | |
300 | return res; | |
301 | } | |
302 | ||
303 | edb = asd_ha->seq.edb_arr[edb_id + escb->edb_index]; | |
304 | ascb->tag = *(__be16 *)(edb->vaddr+4); | |
305 | fh = edb->vaddr + 16; | |
306 | ru = edb->vaddr + 16 + sizeof(*fh); | |
307 | res = ru->status; | |
308 | if (ru->datapres == 1) /* Response data present */ | |
309 | res = ru->resp_data[3]; | |
310 | #if 0 | |
311 | ascb->tag = fh->tag; | |
312 | #endif | |
313 | ascb->tag_valid = 1; | |
314 | ||
315 | asd_invalidate_edb(escb, edb_id); | |
316 | return res; | |
317 | } | |
318 | ||
319 | static void asd_tmf_tasklet_complete(struct asd_ascb *ascb, | |
320 | struct done_list_struct *dl) | |
321 | { | |
e2396f1e JB |
322 | struct tasklet_completion_status *tcs; |
323 | ||
2908d778 JB |
324 | if (!del_timer(&ascb->timer)) |
325 | return; | |
326 | ||
e2396f1e | 327 | tcs = ascb->uldd_task; |
2908d778 JB |
328 | ASD_DPRINTK("tmf tasklet complete\n"); |
329 | ||
e2396f1e | 330 | tcs->dl_opcode = dl->opcode; |
2908d778 | 331 | |
e2396f1e JB |
332 | if (dl->opcode == TC_SSP_RESP) { |
333 | tcs->tmf_state = asd_get_tmf_resp_tasklet(ascb, dl); | |
334 | tcs->tag_valid = ascb->tag_valid; | |
335 | tcs->tag = ascb->tag; | |
336 | } | |
337 | ||
338 | complete(ascb->completion); | |
339 | asd_ascb_free(ascb); | |
2908d778 JB |
340 | } |
341 | ||
81e56ded | 342 | static int asd_clear_nexus(struct sas_task *task) |
2908d778 JB |
343 | { |
344 | int res = TMF_RESP_FUNC_FAILED; | |
8fdcf86a | 345 | int leftover; |
2908d778 | 346 | struct asd_ascb *tascb = task->lldd_task; |
e2396f1e | 347 | DECLARE_COMPLETION_ONSTACK(completion); |
2908d778 JB |
348 | unsigned long flags; |
349 | ||
e2396f1e JB |
350 | tascb->completion = &completion; |
351 | ||
2908d778 JB |
352 | ASD_DPRINTK("task not done, clearing nexus\n"); |
353 | if (tascb->tag_valid) | |
354 | res = asd_clear_nexus_tag(task); | |
355 | else | |
356 | res = asd_clear_nexus_index(task); | |
e2396f1e | 357 | leftover = wait_for_completion_timeout(&completion, |
8fdcf86a | 358 | AIC94XX_SCB_TIMEOUT); |
e2396f1e | 359 | tascb->completion = NULL; |
2908d778 JB |
360 | ASD_DPRINTK("came back from clear nexus\n"); |
361 | spin_lock_irqsave(&task->task_state_lock, flags); | |
8fdcf86a DW |
362 | if (leftover < 1) |
363 | res = TMF_RESP_FUNC_FAILED; | |
2908d778 JB |
364 | if (task->task_state_flags & SAS_TASK_STATE_DONE) |
365 | res = TMF_RESP_FUNC_COMPLETE; | |
366 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
367 | ||
368 | return res; | |
369 | } | |
370 | ||
371 | /** | |
372 | * asd_abort_task -- ABORT TASK TMF | |
373 | * @task: the task to be aborted | |
374 | * | |
375 | * Before calling ABORT TASK the task state flags should be ORed with | |
376 | * SAS_TASK_STATE_ABORTED (unless SAS_TASK_STATE_DONE is set) under | |
377 | * the task_state_lock IRQ spinlock, then ABORT TASK *must* be called. | |
378 | * | |
379 | * Implements the ABORT TASK TMF, I_T_L_Q nexus. | |
380 | * Returns: SAS TMF responses (see sas_task.h), | |
381 | * -ENOMEM, | |
382 | * -SAS_QUEUE_FULL. | |
383 | * | |
384 | * When ABORT TASK returns, the caller of ABORT TASK checks first the | |
385 | * task->task_state_flags, and then the return value of ABORT TASK. | |
386 | * | |
387 | * If the task has task state bit SAS_TASK_STATE_DONE set, then the | |
388 | * task was completed successfully prior to it being aborted. The | |
389 | * caller of ABORT TASK has responsibility to call task->task_done() | |
390 | * xor free the task, depending on their framework. The return code | |
391 | * is TMF_RESP_FUNC_FAILED in this case. | |
392 | * | |
393 | * Else the SAS_TASK_STATE_DONE bit is not set, | |
394 | * If the return code is TMF_RESP_FUNC_COMPLETE, then | |
395 | * the task was aborted successfully. The caller of | |
396 | * ABORT TASK has responsibility to call task->task_done() | |
397 | * to finish the task, xor free the task depending on their | |
398 | * framework. | |
399 | * else | |
400 | * the ABORT TASK returned some kind of error. The task | |
401 | * was _not_ cancelled. Nothing can be assumed. | |
402 | * The caller of ABORT TASK may wish to retry. | |
403 | */ | |
404 | int asd_abort_task(struct sas_task *task) | |
405 | { | |
406 | struct asd_ascb *tascb = task->lldd_task; | |
407 | struct asd_ha_struct *asd_ha = tascb->ha; | |
408 | int res = 1; | |
409 | unsigned long flags; | |
410 | struct asd_ascb *ascb = NULL; | |
411 | struct scb *scb; | |
8fdcf86a | 412 | int leftover; |
e2396f1e JB |
413 | DECLARE_TCS(tcs); |
414 | DECLARE_COMPLETION_ONSTACK(completion); | |
415 | DECLARE_COMPLETION_ONSTACK(tascb_completion); | |
416 | ||
417 | tascb->completion = &tascb_completion; | |
2908d778 JB |
418 | |
419 | spin_lock_irqsave(&task->task_state_lock, flags); | |
420 | if (task->task_state_flags & SAS_TASK_STATE_DONE) { | |
421 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
422 | res = TMF_RESP_FUNC_COMPLETE; | |
cadbd4a5 | 423 | ASD_DPRINTK("%s: task 0x%p done\n", __func__, task); |
2908d778 JB |
424 | goto out_done; |
425 | } | |
426 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
427 | ||
428 | ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL); | |
429 | if (!ascb) | |
430 | return -ENOMEM; | |
2908d778 | 431 | |
e2396f1e JB |
432 | ascb->uldd_task = &tcs; |
433 | ascb->completion = &completion; | |
434 | scb = ascb->scb; | |
90b0c418 | 435 | scb->header.opcode = SCB_ABORT_TASK; |
2908d778 JB |
436 | |
437 | switch (task->task_proto) { | |
5929faf3 DW |
438 | case SAS_PROTOCOL_SATA: |
439 | case SAS_PROTOCOL_STP: | |
2908d778 JB |
440 | scb->abort_task.proto_conn_rate = (1 << 5); /* STP */ |
441 | break; | |
5929faf3 | 442 | case SAS_PROTOCOL_SSP: |
2908d778 JB |
443 | scb->abort_task.proto_conn_rate = (1 << 4); /* SSP */ |
444 | scb->abort_task.proto_conn_rate |= task->dev->linkrate; | |
445 | break; | |
5929faf3 | 446 | case SAS_PROTOCOL_SMP: |
2908d778 JB |
447 | break; |
448 | default: | |
449 | break; | |
450 | } | |
451 | ||
5929faf3 | 452 | if (task->task_proto == SAS_PROTOCOL_SSP) { |
2908d778 JB |
453 | scb->abort_task.ssp_frame.frame_type = SSP_TASK; |
454 | memcpy(scb->abort_task.ssp_frame.hashed_dest_addr, | |
455 | task->dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); | |
456 | memcpy(scb->abort_task.ssp_frame.hashed_src_addr, | |
457 | task->dev->port->ha->hashed_sas_addr, | |
458 | HASHED_SAS_ADDR_SIZE); | |
459 | scb->abort_task.ssp_frame.tptt = cpu_to_be16(0xFFFF); | |
460 | ||
461 | memcpy(scb->abort_task.ssp_task.lun, task->ssp_task.LUN, 8); | |
462 | scb->abort_task.ssp_task.tmf = TMF_ABORT_TASK; | |
463 | scb->abort_task.ssp_task.tag = cpu_to_be16(0xFFFF); | |
464 | } | |
465 | ||
466 | scb->abort_task.sister_scb = cpu_to_le16(0xFFFF); | |
467 | scb->abort_task.conn_handle = cpu_to_le16( | |
468 | (u16)(unsigned long)task->dev->lldd_dev); | |
469 | scb->abort_task.retry_count = 1; | |
470 | scb->abort_task.index = cpu_to_le16((u16)tascb->tc_index); | |
471 | scb->abort_task.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST); | |
472 | ||
473 | res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete, | |
474 | asd_tmf_timedout); | |
475 | if (res) | |
e2396f1e JB |
476 | goto out_free; |
477 | wait_for_completion(&completion); | |
2908d778 JB |
478 | ASD_DPRINTK("tmf came back\n"); |
479 | ||
e2396f1e JB |
480 | tascb->tag = tcs.tag; |
481 | tascb->tag_valid = tcs.tag_valid; | |
2908d778 JB |
482 | |
483 | spin_lock_irqsave(&task->task_state_lock, flags); | |
484 | if (task->task_state_flags & SAS_TASK_STATE_DONE) { | |
485 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
486 | res = TMF_RESP_FUNC_COMPLETE; | |
cadbd4a5 | 487 | ASD_DPRINTK("%s: task 0x%p done\n", __func__, task); |
2908d778 JB |
488 | goto out_done; |
489 | } | |
490 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
491 | ||
e2396f1e JB |
492 | if (tcs.dl_opcode == TC_SSP_RESP) { |
493 | /* The task to be aborted has been sent to the device. | |
494 | * We got a Response IU for the ABORT TASK TMF. */ | |
495 | if (tcs.tmf_state == TMF_RESP_FUNC_COMPLETE) | |
496 | res = asd_clear_nexus(task); | |
497 | else | |
498 | res = tcs.tmf_state; | |
499 | } else if (tcs.dl_opcode == TC_NO_ERROR && | |
500 | tcs.tmf_state == TMF_RESP_FUNC_FAILED) { | |
501 | /* timeout */ | |
2908d778 | 502 | res = TMF_RESP_FUNC_FAILED; |
e2396f1e JB |
503 | } else { |
504 | /* In the following we assume that the managing layer | |
505 | * will _never_ make a mistake, when issuing ABORT | |
506 | * TASK. | |
507 | */ | |
508 | switch (tcs.dl_opcode) { | |
509 | default: | |
510 | res = asd_clear_nexus(task); | |
511 | /* fallthrough */ | |
512 | case TC_NO_ERROR: | |
513 | break; | |
514 | /* The task hasn't been sent to the device xor | |
515 | * we never got a (sane) Response IU for the | |
516 | * ABORT TASK TMF. | |
517 | */ | |
518 | case TF_NAK_RECV: | |
519 | res = TMF_RESP_INVALID_FRAME; | |
520 | break; | |
521 | case TF_TMF_TASK_DONE: /* done but not reported yet */ | |
8fdcf86a | 522 | res = TMF_RESP_FUNC_FAILED; |
e2396f1e JB |
523 | leftover = |
524 | wait_for_completion_timeout(&tascb_completion, | |
525 | AIC94XX_SCB_TIMEOUT); | |
526 | spin_lock_irqsave(&task->task_state_lock, flags); | |
527 | if (leftover < 1) | |
528 | res = TMF_RESP_FUNC_FAILED; | |
529 | if (task->task_state_flags & SAS_TASK_STATE_DONE) | |
530 | res = TMF_RESP_FUNC_COMPLETE; | |
531 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
532 | break; | |
533 | case TF_TMF_NO_TAG: | |
534 | case TF_TMF_TAG_FREE: /* the tag is in the free list */ | |
535 | case TF_TMF_NO_CONN_HANDLE: /* no such device */ | |
2908d778 | 536 | res = TMF_RESP_FUNC_COMPLETE; |
e2396f1e JB |
537 | break; |
538 | case TF_TMF_NO_CTX: /* not in seq, or proto != SSP */ | |
539 | res = TMF_RESP_FUNC_ESUPP; | |
540 | break; | |
541 | } | |
2908d778 | 542 | } |
e2396f1e JB |
543 | out_done: |
544 | tascb->completion = NULL; | |
2908d778 JB |
545 | if (res == TMF_RESP_FUNC_COMPLETE) { |
546 | task->lldd_task = NULL; | |
547 | mb(); | |
548 | asd_ascb_free(tascb); | |
549 | } | |
e2396f1e JB |
550 | ASD_DPRINTK("task 0x%p aborted, res: 0x%x\n", task, res); |
551 | return res; | |
552 | ||
553 | out_free: | |
2908d778 JB |
554 | asd_ascb_free(ascb); |
555 | ASD_DPRINTK("task 0x%p aborted, res: 0x%x\n", task, res); | |
556 | return res; | |
557 | } | |
558 | ||
559 | /** | |
560 | * asd_initiate_ssp_tmf -- send a TMF to an I_T_L or I_T_L_Q nexus | |
561 | * @dev: pointer to struct domain_device of interest | |
562 | * @lun: pointer to u8[8] which is the LUN | |
563 | * @tmf: the TMF to be performed (see sas_task.h or the SAS spec) | |
564 | * @index: the transaction context of the task to be queried if QT TMF | |
565 | * | |
566 | * This function is used to send ABORT TASK SET, CLEAR ACA, | |
567 | * CLEAR TASK SET, LU RESET and QUERY TASK TMFs. | |
568 | * | |
569 | * No SCBs should be queued to the I_T_L nexus when this SCB is | |
570 | * pending. | |
571 | * | |
572 | * Returns: TMF response code (see sas_task.h or the SAS spec) | |
573 | */ | |
574 | static int asd_initiate_ssp_tmf(struct domain_device *dev, u8 *lun, | |
575 | int tmf, int index) | |
576 | { | |
577 | struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha; | |
578 | struct asd_ascb *ascb; | |
579 | int res = 1; | |
580 | struct scb *scb; | |
e2396f1e JB |
581 | DECLARE_COMPLETION_ONSTACK(completion); |
582 | DECLARE_TCS(tcs); | |
2908d778 | 583 | |
5929faf3 | 584 | if (!(dev->tproto & SAS_PROTOCOL_SSP)) |
2908d778 JB |
585 | return TMF_RESP_FUNC_ESUPP; |
586 | ||
587 | ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL); | |
588 | if (!ascb) | |
589 | return -ENOMEM; | |
e2396f1e JB |
590 | |
591 | ascb->completion = &completion; | |
592 | ascb->uldd_task = &tcs; | |
2908d778 JB |
593 | scb = ascb->scb; |
594 | ||
595 | if (tmf == TMF_QUERY_TASK) | |
596 | scb->header.opcode = QUERY_SSP_TASK; | |
597 | else | |
598 | scb->header.opcode = INITIATE_SSP_TMF; | |
599 | ||
600 | scb->ssp_tmf.proto_conn_rate = (1 << 4); /* SSP */ | |
601 | scb->ssp_tmf.proto_conn_rate |= dev->linkrate; | |
602 | /* SSP frame header */ | |
603 | scb->ssp_tmf.ssp_frame.frame_type = SSP_TASK; | |
604 | memcpy(scb->ssp_tmf.ssp_frame.hashed_dest_addr, | |
605 | dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); | |
606 | memcpy(scb->ssp_tmf.ssp_frame.hashed_src_addr, | |
607 | dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); | |
608 | scb->ssp_tmf.ssp_frame.tptt = cpu_to_be16(0xFFFF); | |
609 | /* SSP Task IU */ | |
610 | memcpy(scb->ssp_tmf.ssp_task.lun, lun, 8); | |
611 | scb->ssp_tmf.ssp_task.tmf = tmf; | |
612 | ||
613 | scb->ssp_tmf.sister_scb = cpu_to_le16(0xFFFF); | |
614 | scb->ssp_tmf.conn_handle= cpu_to_le16((u16)(unsigned long) | |
615 | dev->lldd_dev); | |
616 | scb->ssp_tmf.retry_count = 1; | |
617 | scb->ssp_tmf.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST); | |
618 | if (tmf == TMF_QUERY_TASK) | |
619 | scb->ssp_tmf.index = cpu_to_le16(index); | |
620 | ||
621 | res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete, | |
622 | asd_tmf_timedout); | |
623 | if (res) | |
624 | goto out_err; | |
e2396f1e | 625 | wait_for_completion(&completion); |
2908d778 | 626 | |
e2396f1e JB |
627 | switch (tcs.dl_opcode) { |
628 | case TC_NO_ERROR: | |
2908d778 JB |
629 | res = TMF_RESP_FUNC_COMPLETE; |
630 | break; | |
e2396f1e | 631 | case TF_NAK_RECV: |
2908d778 JB |
632 | res = TMF_RESP_INVALID_FRAME; |
633 | break; | |
e2396f1e | 634 | case TF_TMF_TASK_DONE: |
2908d778 JB |
635 | res = TMF_RESP_FUNC_FAILED; |
636 | break; | |
e2396f1e JB |
637 | case TF_TMF_NO_TAG: |
638 | case TF_TMF_TAG_FREE: /* the tag is in the free list */ | |
639 | case TF_TMF_NO_CONN_HANDLE: /* no such device */ | |
2908d778 JB |
640 | res = TMF_RESP_FUNC_COMPLETE; |
641 | break; | |
e2396f1e | 642 | case TF_TMF_NO_CTX: /* not in seq, or proto != SSP */ |
2908d778 JB |
643 | res = TMF_RESP_FUNC_ESUPP; |
644 | break; | |
645 | default: | |
058e2c47 | 646 | /* Allow TMF response codes to propagate upwards */ |
e2396f1e | 647 | res = tcs.dl_opcode; |
2908d778 JB |
648 | break; |
649 | } | |
e2396f1e | 650 | return res; |
2908d778 JB |
651 | out_err: |
652 | asd_ascb_free(ascb); | |
653 | return res; | |
654 | } | |
655 | ||
656 | int asd_abort_task_set(struct domain_device *dev, u8 *lun) | |
657 | { | |
658 | int res = asd_initiate_ssp_tmf(dev, lun, TMF_ABORT_TASK_SET, 0); | |
659 | ||
660 | if (res == TMF_RESP_FUNC_COMPLETE) | |
661 | asd_clear_nexus_I_T_L(dev, lun); | |
662 | return res; | |
663 | } | |
664 | ||
665 | int asd_clear_aca(struct domain_device *dev, u8 *lun) | |
666 | { | |
667 | int res = asd_initiate_ssp_tmf(dev, lun, TMF_CLEAR_ACA, 0); | |
668 | ||
669 | if (res == TMF_RESP_FUNC_COMPLETE) | |
670 | asd_clear_nexus_I_T_L(dev, lun); | |
671 | return res; | |
672 | } | |
673 | ||
674 | int asd_clear_task_set(struct domain_device *dev, u8 *lun) | |
675 | { | |
676 | int res = asd_initiate_ssp_tmf(dev, lun, TMF_CLEAR_TASK_SET, 0); | |
677 | ||
678 | if (res == TMF_RESP_FUNC_COMPLETE) | |
679 | asd_clear_nexus_I_T_L(dev, lun); | |
680 | return res; | |
681 | } | |
682 | ||
683 | int asd_lu_reset(struct domain_device *dev, u8 *lun) | |
684 | { | |
685 | int res = asd_initiate_ssp_tmf(dev, lun, TMF_LU_RESET, 0); | |
686 | ||
687 | if (res == TMF_RESP_FUNC_COMPLETE) | |
688 | asd_clear_nexus_I_T_L(dev, lun); | |
689 | return res; | |
690 | } | |
691 | ||
692 | /** | |
693 | * asd_query_task -- send a QUERY TASK TMF to an I_T_L_Q nexus | |
694 | * task: pointer to sas_task struct of interest | |
695 | * | |
696 | * Returns: TMF_RESP_FUNC_COMPLETE if the task is not in the task set, | |
697 | * or TMF_RESP_FUNC_SUCC if the task is in the task set. | |
698 | * | |
699 | * Normally the management layer sets the task to aborted state, | |
700 | * and then calls query task and then abort task. | |
701 | */ | |
702 | int asd_query_task(struct sas_task *task) | |
703 | { | |
704 | struct asd_ascb *ascb = task->lldd_task; | |
705 | int index; | |
706 | ||
707 | if (ascb) { | |
708 | index = ascb->tc_index; | |
709 | return asd_initiate_ssp_tmf(task->dev, task->ssp_task.LUN, | |
710 | TMF_QUERY_TASK, index); | |
711 | } | |
712 | return TMF_RESP_FUNC_COMPLETE; | |
713 | } |