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> | |
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 | ||
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 | ||
89 | static void asd_clear_nexus_timedout(unsigned long data) | |
90 | { | |
e2396f1e JB |
91 | struct asd_ascb *ascb = (void *)data; |
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; | |
183 | struct sas_phy *phy = sas_find_local_phy(dev); | |
184 | /* Standard mandates link reset for ATA (type 0) and | |
185 | * hard reset for SSP (type 1) */ | |
186 | int reset_type = (dev->dev_type == SATA_DEV || | |
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", | |
192 | reset_type ? "hard" : "soft", phy->dev.bus_id); | |
193 | res = sas_phy_reset(phy, reset_type); | |
194 | if (res == TMF_RESP_FUNC_COMPLETE) { | |
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) | |
203 | return res; | |
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 | ||
213 | return TMF_RESP_FUNC_FAILED; | |
214 | } | |
2908d778 JB |
215 | |
216 | static int asd_clear_nexus_I_T_L(struct domain_device *dev, u8 *lun) | |
217 | { | |
218 | struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha; | |
2908d778 JB |
219 | |
220 | CLEAR_NEXUS_PRE; | |
221 | scb->clear_nexus.nexus = NEXUS_I_T_L; | |
222 | scb->clear_nexus.flags = SEND_Q | EXEC_Q | NOTINQ; | |
2908d778 JB |
223 | memcpy(scb->clear_nexus.ssp_task.lun, lun, 8); |
224 | scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long) | |
225 | dev->lldd_dev); | |
226 | CLEAR_NEXUS_POST; | |
227 | } | |
228 | ||
229 | static int asd_clear_nexus_tag(struct sas_task *task) | |
230 | { | |
231 | struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha; | |
232 | struct asd_ascb *tascb = task->lldd_task; | |
2908d778 JB |
233 | |
234 | CLEAR_NEXUS_PRE; | |
235 | scb->clear_nexus.nexus = NEXUS_TAG; | |
236 | memcpy(scb->clear_nexus.ssp_task.lun, task->ssp_task.LUN, 8); | |
237 | scb->clear_nexus.ssp_task.tag = tascb->tag; | |
238 | if (task->dev->tproto) | |
239 | scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long) | |
240 | task->dev->lldd_dev); | |
241 | CLEAR_NEXUS_POST; | |
242 | } | |
243 | ||
244 | static int asd_clear_nexus_index(struct sas_task *task) | |
245 | { | |
246 | struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha; | |
247 | struct asd_ascb *tascb = task->lldd_task; | |
2908d778 JB |
248 | |
249 | CLEAR_NEXUS_PRE; | |
250 | scb->clear_nexus.nexus = NEXUS_TRANS_CX; | |
251 | if (task->dev->tproto) | |
252 | scb->clear_nexus.conn_handle = cpu_to_le16((u16)(unsigned long) | |
253 | task->dev->lldd_dev); | |
254 | scb->clear_nexus.index = cpu_to_le16(tascb->tc_index); | |
255 | CLEAR_NEXUS_POST; | |
256 | } | |
257 | ||
258 | /* ---------- TMFs ---------- */ | |
259 | ||
260 | static void asd_tmf_timedout(unsigned long data) | |
261 | { | |
262 | struct asd_ascb *ascb = (void *) data; | |
e2396f1e | 263 | struct tasklet_completion_status *tcs = ascb->uldd_task; |
2908d778 JB |
264 | |
265 | ASD_DPRINTK("tmf timed out\n"); | |
e2396f1e JB |
266 | tcs->tmf_state = TMF_RESP_FUNC_FAILED; |
267 | complete(ascb->completion); | |
2908d778 JB |
268 | } |
269 | ||
270 | static int asd_get_tmf_resp_tasklet(struct asd_ascb *ascb, | |
271 | struct done_list_struct *dl) | |
272 | { | |
273 | struct asd_ha_struct *asd_ha = ascb->ha; | |
274 | unsigned long flags; | |
275 | struct tc_resp_sb_struct { | |
276 | __le16 index_escb; | |
277 | u8 len_lsb; | |
278 | u8 flags; | |
279 | } __attribute__ ((packed)) *resp_sb = (void *) dl->status_block; | |
280 | ||
281 | int edb_id = ((resp_sb->flags & 0x70) >> 4)-1; | |
282 | struct asd_ascb *escb; | |
283 | struct asd_dma_tok *edb; | |
284 | struct ssp_frame_hdr *fh; | |
285 | struct ssp_response_iu *ru; | |
286 | int res = TMF_RESP_FUNC_FAILED; | |
287 | ||
288 | ASD_DPRINTK("tmf resp tasklet\n"); | |
289 | ||
290 | spin_lock_irqsave(&asd_ha->seq.tc_index_lock, flags); | |
291 | escb = asd_tc_index_find(&asd_ha->seq, | |
292 | (int)le16_to_cpu(resp_sb->index_escb)); | |
293 | spin_unlock_irqrestore(&asd_ha->seq.tc_index_lock, flags); | |
294 | ||
295 | if (!escb) { | |
296 | ASD_DPRINTK("Uh-oh! No escb for this dl?!\n"); | |
297 | return res; | |
298 | } | |
299 | ||
300 | edb = asd_ha->seq.edb_arr[edb_id + escb->edb_index]; | |
301 | ascb->tag = *(__be16 *)(edb->vaddr+4); | |
302 | fh = edb->vaddr + 16; | |
303 | ru = edb->vaddr + 16 + sizeof(*fh); | |
304 | res = ru->status; | |
305 | if (ru->datapres == 1) /* Response data present */ | |
306 | res = ru->resp_data[3]; | |
307 | #if 0 | |
308 | ascb->tag = fh->tag; | |
309 | #endif | |
310 | ascb->tag_valid = 1; | |
311 | ||
312 | asd_invalidate_edb(escb, edb_id); | |
313 | return res; | |
314 | } | |
315 | ||
316 | static void asd_tmf_tasklet_complete(struct asd_ascb *ascb, | |
317 | struct done_list_struct *dl) | |
318 | { | |
e2396f1e JB |
319 | struct tasklet_completion_status *tcs; |
320 | ||
2908d778 JB |
321 | if (!del_timer(&ascb->timer)) |
322 | return; | |
323 | ||
e2396f1e | 324 | tcs = ascb->uldd_task; |
2908d778 JB |
325 | ASD_DPRINTK("tmf tasklet complete\n"); |
326 | ||
e2396f1e | 327 | tcs->dl_opcode = dl->opcode; |
2908d778 | 328 | |
e2396f1e JB |
329 | if (dl->opcode == TC_SSP_RESP) { |
330 | tcs->tmf_state = asd_get_tmf_resp_tasklet(ascb, dl); | |
331 | tcs->tag_valid = ascb->tag_valid; | |
332 | tcs->tag = ascb->tag; | |
333 | } | |
334 | ||
335 | complete(ascb->completion); | |
336 | asd_ascb_free(ascb); | |
2908d778 JB |
337 | } |
338 | ||
81e56ded | 339 | static int asd_clear_nexus(struct sas_task *task) |
2908d778 JB |
340 | { |
341 | int res = TMF_RESP_FUNC_FAILED; | |
8fdcf86a | 342 | int leftover; |
2908d778 | 343 | struct asd_ascb *tascb = task->lldd_task; |
e2396f1e | 344 | DECLARE_COMPLETION_ONSTACK(completion); |
2908d778 JB |
345 | unsigned long flags; |
346 | ||
e2396f1e JB |
347 | tascb->completion = &completion; |
348 | ||
2908d778 JB |
349 | ASD_DPRINTK("task not done, clearing nexus\n"); |
350 | if (tascb->tag_valid) | |
351 | res = asd_clear_nexus_tag(task); | |
352 | else | |
353 | res = asd_clear_nexus_index(task); | |
e2396f1e | 354 | leftover = wait_for_completion_timeout(&completion, |
8fdcf86a | 355 | AIC94XX_SCB_TIMEOUT); |
e2396f1e | 356 | tascb->completion = NULL; |
2908d778 JB |
357 | ASD_DPRINTK("came back from clear nexus\n"); |
358 | spin_lock_irqsave(&task->task_state_lock, flags); | |
8fdcf86a DW |
359 | if (leftover < 1) |
360 | res = TMF_RESP_FUNC_FAILED; | |
2908d778 JB |
361 | if (task->task_state_flags & SAS_TASK_STATE_DONE) |
362 | res = TMF_RESP_FUNC_COMPLETE; | |
363 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
364 | ||
365 | return res; | |
366 | } | |
367 | ||
368 | /** | |
369 | * asd_abort_task -- ABORT TASK TMF | |
370 | * @task: the task to be aborted | |
371 | * | |
372 | * Before calling ABORT TASK the task state flags should be ORed with | |
373 | * SAS_TASK_STATE_ABORTED (unless SAS_TASK_STATE_DONE is set) under | |
374 | * the task_state_lock IRQ spinlock, then ABORT TASK *must* be called. | |
375 | * | |
376 | * Implements the ABORT TASK TMF, I_T_L_Q nexus. | |
377 | * Returns: SAS TMF responses (see sas_task.h), | |
378 | * -ENOMEM, | |
379 | * -SAS_QUEUE_FULL. | |
380 | * | |
381 | * When ABORT TASK returns, the caller of ABORT TASK checks first the | |
382 | * task->task_state_flags, and then the return value of ABORT TASK. | |
383 | * | |
384 | * If the task has task state bit SAS_TASK_STATE_DONE set, then the | |
385 | * task was completed successfully prior to it being aborted. The | |
386 | * caller of ABORT TASK has responsibility to call task->task_done() | |
387 | * xor free the task, depending on their framework. The return code | |
388 | * is TMF_RESP_FUNC_FAILED in this case. | |
389 | * | |
390 | * Else the SAS_TASK_STATE_DONE bit is not set, | |
391 | * If the return code is TMF_RESP_FUNC_COMPLETE, then | |
392 | * the task was aborted successfully. The caller of | |
393 | * ABORT TASK has responsibility to call task->task_done() | |
394 | * to finish the task, xor free the task depending on their | |
395 | * framework. | |
396 | * else | |
397 | * the ABORT TASK returned some kind of error. The task | |
398 | * was _not_ cancelled. Nothing can be assumed. | |
399 | * The caller of ABORT TASK may wish to retry. | |
400 | */ | |
401 | int asd_abort_task(struct sas_task *task) | |
402 | { | |
403 | struct asd_ascb *tascb = task->lldd_task; | |
404 | struct asd_ha_struct *asd_ha = tascb->ha; | |
405 | int res = 1; | |
406 | unsigned long flags; | |
407 | struct asd_ascb *ascb = NULL; | |
408 | struct scb *scb; | |
8fdcf86a | 409 | int leftover; |
e2396f1e JB |
410 | DECLARE_TCS(tcs); |
411 | DECLARE_COMPLETION_ONSTACK(completion); | |
412 | DECLARE_COMPLETION_ONSTACK(tascb_completion); | |
413 | ||
414 | tascb->completion = &tascb_completion; | |
2908d778 JB |
415 | |
416 | spin_lock_irqsave(&task->task_state_lock, flags); | |
417 | if (task->task_state_flags & SAS_TASK_STATE_DONE) { | |
418 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
419 | res = TMF_RESP_FUNC_COMPLETE; | |
cadbd4a5 | 420 | ASD_DPRINTK("%s: task 0x%p done\n", __func__, task); |
2908d778 JB |
421 | goto out_done; |
422 | } | |
423 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
424 | ||
425 | ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL); | |
426 | if (!ascb) | |
427 | return -ENOMEM; | |
2908d778 | 428 | |
e2396f1e JB |
429 | ascb->uldd_task = &tcs; |
430 | ascb->completion = &completion; | |
431 | scb = ascb->scb; | |
90b0c418 | 432 | scb->header.opcode = SCB_ABORT_TASK; |
2908d778 JB |
433 | |
434 | switch (task->task_proto) { | |
5929faf3 DW |
435 | case SAS_PROTOCOL_SATA: |
436 | case SAS_PROTOCOL_STP: | |
2908d778 JB |
437 | scb->abort_task.proto_conn_rate = (1 << 5); /* STP */ |
438 | break; | |
5929faf3 | 439 | case SAS_PROTOCOL_SSP: |
2908d778 JB |
440 | scb->abort_task.proto_conn_rate = (1 << 4); /* SSP */ |
441 | scb->abort_task.proto_conn_rate |= task->dev->linkrate; | |
442 | break; | |
5929faf3 | 443 | case SAS_PROTOCOL_SMP: |
2908d778 JB |
444 | break; |
445 | default: | |
446 | break; | |
447 | } | |
448 | ||
5929faf3 | 449 | if (task->task_proto == SAS_PROTOCOL_SSP) { |
2908d778 JB |
450 | scb->abort_task.ssp_frame.frame_type = SSP_TASK; |
451 | memcpy(scb->abort_task.ssp_frame.hashed_dest_addr, | |
452 | task->dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); | |
453 | memcpy(scb->abort_task.ssp_frame.hashed_src_addr, | |
454 | task->dev->port->ha->hashed_sas_addr, | |
455 | HASHED_SAS_ADDR_SIZE); | |
456 | scb->abort_task.ssp_frame.tptt = cpu_to_be16(0xFFFF); | |
457 | ||
458 | memcpy(scb->abort_task.ssp_task.lun, task->ssp_task.LUN, 8); | |
459 | scb->abort_task.ssp_task.tmf = TMF_ABORT_TASK; | |
460 | scb->abort_task.ssp_task.tag = cpu_to_be16(0xFFFF); | |
461 | } | |
462 | ||
463 | scb->abort_task.sister_scb = cpu_to_le16(0xFFFF); | |
464 | scb->abort_task.conn_handle = cpu_to_le16( | |
465 | (u16)(unsigned long)task->dev->lldd_dev); | |
466 | scb->abort_task.retry_count = 1; | |
467 | scb->abort_task.index = cpu_to_le16((u16)tascb->tc_index); | |
468 | scb->abort_task.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST); | |
469 | ||
470 | res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete, | |
471 | asd_tmf_timedout); | |
472 | if (res) | |
e2396f1e JB |
473 | goto out_free; |
474 | wait_for_completion(&completion); | |
2908d778 JB |
475 | ASD_DPRINTK("tmf came back\n"); |
476 | ||
e2396f1e JB |
477 | tascb->tag = tcs.tag; |
478 | tascb->tag_valid = tcs.tag_valid; | |
2908d778 JB |
479 | |
480 | spin_lock_irqsave(&task->task_state_lock, flags); | |
481 | if (task->task_state_flags & SAS_TASK_STATE_DONE) { | |
482 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
483 | res = TMF_RESP_FUNC_COMPLETE; | |
cadbd4a5 | 484 | ASD_DPRINTK("%s: task 0x%p done\n", __func__, task); |
2908d778 JB |
485 | goto out_done; |
486 | } | |
487 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
488 | ||
e2396f1e JB |
489 | if (tcs.dl_opcode == TC_SSP_RESP) { |
490 | /* The task to be aborted has been sent to the device. | |
491 | * We got a Response IU for the ABORT TASK TMF. */ | |
492 | if (tcs.tmf_state == TMF_RESP_FUNC_COMPLETE) | |
493 | res = asd_clear_nexus(task); | |
494 | else | |
495 | res = tcs.tmf_state; | |
496 | } else if (tcs.dl_opcode == TC_NO_ERROR && | |
497 | tcs.tmf_state == TMF_RESP_FUNC_FAILED) { | |
498 | /* timeout */ | |
2908d778 | 499 | res = TMF_RESP_FUNC_FAILED; |
e2396f1e JB |
500 | } else { |
501 | /* In the following we assume that the managing layer | |
502 | * will _never_ make a mistake, when issuing ABORT | |
503 | * TASK. | |
504 | */ | |
505 | switch (tcs.dl_opcode) { | |
506 | default: | |
507 | res = asd_clear_nexus(task); | |
508 | /* fallthrough */ | |
509 | case TC_NO_ERROR: | |
510 | break; | |
511 | /* The task hasn't been sent to the device xor | |
512 | * we never got a (sane) Response IU for the | |
513 | * ABORT TASK TMF. | |
514 | */ | |
515 | case TF_NAK_RECV: | |
516 | res = TMF_RESP_INVALID_FRAME; | |
517 | break; | |
518 | case TF_TMF_TASK_DONE: /* done but not reported yet */ | |
8fdcf86a | 519 | res = TMF_RESP_FUNC_FAILED; |
e2396f1e JB |
520 | leftover = |
521 | wait_for_completion_timeout(&tascb_completion, | |
522 | AIC94XX_SCB_TIMEOUT); | |
523 | spin_lock_irqsave(&task->task_state_lock, flags); | |
524 | if (leftover < 1) | |
525 | res = TMF_RESP_FUNC_FAILED; | |
526 | if (task->task_state_flags & SAS_TASK_STATE_DONE) | |
527 | res = TMF_RESP_FUNC_COMPLETE; | |
528 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
529 | break; | |
530 | case TF_TMF_NO_TAG: | |
531 | case TF_TMF_TAG_FREE: /* the tag is in the free list */ | |
532 | case TF_TMF_NO_CONN_HANDLE: /* no such device */ | |
2908d778 | 533 | res = TMF_RESP_FUNC_COMPLETE; |
e2396f1e JB |
534 | break; |
535 | case TF_TMF_NO_CTX: /* not in seq, or proto != SSP */ | |
536 | res = TMF_RESP_FUNC_ESUPP; | |
537 | break; | |
538 | } | |
2908d778 | 539 | } |
e2396f1e JB |
540 | out_done: |
541 | tascb->completion = NULL; | |
2908d778 JB |
542 | if (res == TMF_RESP_FUNC_COMPLETE) { |
543 | task->lldd_task = NULL; | |
544 | mb(); | |
545 | asd_ascb_free(tascb); | |
546 | } | |
e2396f1e JB |
547 | ASD_DPRINTK("task 0x%p aborted, res: 0x%x\n", task, res); |
548 | return res; | |
549 | ||
550 | out_free: | |
2908d778 JB |
551 | asd_ascb_free(ascb); |
552 | ASD_DPRINTK("task 0x%p aborted, res: 0x%x\n", task, res); | |
553 | return res; | |
554 | } | |
555 | ||
556 | /** | |
557 | * asd_initiate_ssp_tmf -- send a TMF to an I_T_L or I_T_L_Q nexus | |
558 | * @dev: pointer to struct domain_device of interest | |
559 | * @lun: pointer to u8[8] which is the LUN | |
560 | * @tmf: the TMF to be performed (see sas_task.h or the SAS spec) | |
561 | * @index: the transaction context of the task to be queried if QT TMF | |
562 | * | |
563 | * This function is used to send ABORT TASK SET, CLEAR ACA, | |
564 | * CLEAR TASK SET, LU RESET and QUERY TASK TMFs. | |
565 | * | |
566 | * No SCBs should be queued to the I_T_L nexus when this SCB is | |
567 | * pending. | |
568 | * | |
569 | * Returns: TMF response code (see sas_task.h or the SAS spec) | |
570 | */ | |
571 | static int asd_initiate_ssp_tmf(struct domain_device *dev, u8 *lun, | |
572 | int tmf, int index) | |
573 | { | |
574 | struct asd_ha_struct *asd_ha = dev->port->ha->lldd_ha; | |
575 | struct asd_ascb *ascb; | |
576 | int res = 1; | |
577 | struct scb *scb; | |
e2396f1e JB |
578 | DECLARE_COMPLETION_ONSTACK(completion); |
579 | DECLARE_TCS(tcs); | |
2908d778 | 580 | |
5929faf3 | 581 | if (!(dev->tproto & SAS_PROTOCOL_SSP)) |
2908d778 JB |
582 | return TMF_RESP_FUNC_ESUPP; |
583 | ||
584 | ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL); | |
585 | if (!ascb) | |
586 | return -ENOMEM; | |
e2396f1e JB |
587 | |
588 | ascb->completion = &completion; | |
589 | ascb->uldd_task = &tcs; | |
2908d778 JB |
590 | scb = ascb->scb; |
591 | ||
592 | if (tmf == TMF_QUERY_TASK) | |
593 | scb->header.opcode = QUERY_SSP_TASK; | |
594 | else | |
595 | scb->header.opcode = INITIATE_SSP_TMF; | |
596 | ||
597 | scb->ssp_tmf.proto_conn_rate = (1 << 4); /* SSP */ | |
598 | scb->ssp_tmf.proto_conn_rate |= dev->linkrate; | |
599 | /* SSP frame header */ | |
600 | scb->ssp_tmf.ssp_frame.frame_type = SSP_TASK; | |
601 | memcpy(scb->ssp_tmf.ssp_frame.hashed_dest_addr, | |
602 | dev->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); | |
603 | memcpy(scb->ssp_tmf.ssp_frame.hashed_src_addr, | |
604 | dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE); | |
605 | scb->ssp_tmf.ssp_frame.tptt = cpu_to_be16(0xFFFF); | |
606 | /* SSP Task IU */ | |
607 | memcpy(scb->ssp_tmf.ssp_task.lun, lun, 8); | |
608 | scb->ssp_tmf.ssp_task.tmf = tmf; | |
609 | ||
610 | scb->ssp_tmf.sister_scb = cpu_to_le16(0xFFFF); | |
611 | scb->ssp_tmf.conn_handle= cpu_to_le16((u16)(unsigned long) | |
612 | dev->lldd_dev); | |
613 | scb->ssp_tmf.retry_count = 1; | |
614 | scb->ssp_tmf.itnl_to = cpu_to_le16(ITNL_TIMEOUT_CONST); | |
615 | if (tmf == TMF_QUERY_TASK) | |
616 | scb->ssp_tmf.index = cpu_to_le16(index); | |
617 | ||
618 | res = asd_enqueue_internal(ascb, asd_tmf_tasklet_complete, | |
619 | asd_tmf_timedout); | |
620 | if (res) | |
621 | goto out_err; | |
e2396f1e | 622 | wait_for_completion(&completion); |
2908d778 | 623 | |
e2396f1e JB |
624 | switch (tcs.dl_opcode) { |
625 | case TC_NO_ERROR: | |
2908d778 JB |
626 | res = TMF_RESP_FUNC_COMPLETE; |
627 | break; | |
e2396f1e | 628 | case TF_NAK_RECV: |
2908d778 JB |
629 | res = TMF_RESP_INVALID_FRAME; |
630 | break; | |
e2396f1e | 631 | case TF_TMF_TASK_DONE: |
2908d778 JB |
632 | res = TMF_RESP_FUNC_FAILED; |
633 | break; | |
e2396f1e JB |
634 | case TF_TMF_NO_TAG: |
635 | case TF_TMF_TAG_FREE: /* the tag is in the free list */ | |
636 | case TF_TMF_NO_CONN_HANDLE: /* no such device */ | |
2908d778 JB |
637 | res = TMF_RESP_FUNC_COMPLETE; |
638 | break; | |
e2396f1e | 639 | case TF_TMF_NO_CTX: /* not in seq, or proto != SSP */ |
2908d778 JB |
640 | res = TMF_RESP_FUNC_ESUPP; |
641 | break; | |
642 | default: | |
058e2c47 | 643 | /* Allow TMF response codes to propagate upwards */ |
e2396f1e | 644 | res = tcs.dl_opcode; |
2908d778 JB |
645 | break; |
646 | } | |
e2396f1e | 647 | return res; |
2908d778 JB |
648 | out_err: |
649 | asd_ascb_free(ascb); | |
650 | return res; | |
651 | } | |
652 | ||
653 | int asd_abort_task_set(struct domain_device *dev, u8 *lun) | |
654 | { | |
655 | int res = asd_initiate_ssp_tmf(dev, lun, TMF_ABORT_TASK_SET, 0); | |
656 | ||
657 | if (res == TMF_RESP_FUNC_COMPLETE) | |
658 | asd_clear_nexus_I_T_L(dev, lun); | |
659 | return res; | |
660 | } | |
661 | ||
662 | int asd_clear_aca(struct domain_device *dev, u8 *lun) | |
663 | { | |
664 | int res = asd_initiate_ssp_tmf(dev, lun, TMF_CLEAR_ACA, 0); | |
665 | ||
666 | if (res == TMF_RESP_FUNC_COMPLETE) | |
667 | asd_clear_nexus_I_T_L(dev, lun); | |
668 | return res; | |
669 | } | |
670 | ||
671 | int asd_clear_task_set(struct domain_device *dev, u8 *lun) | |
672 | { | |
673 | int res = asd_initiate_ssp_tmf(dev, lun, TMF_CLEAR_TASK_SET, 0); | |
674 | ||
675 | if (res == TMF_RESP_FUNC_COMPLETE) | |
676 | asd_clear_nexus_I_T_L(dev, lun); | |
677 | return res; | |
678 | } | |
679 | ||
680 | int asd_lu_reset(struct domain_device *dev, u8 *lun) | |
681 | { | |
682 | int res = asd_initiate_ssp_tmf(dev, lun, TMF_LU_RESET, 0); | |
683 | ||
684 | if (res == TMF_RESP_FUNC_COMPLETE) | |
685 | asd_clear_nexus_I_T_L(dev, lun); | |
686 | return res; | |
687 | } | |
688 | ||
689 | /** | |
690 | * asd_query_task -- send a QUERY TASK TMF to an I_T_L_Q nexus | |
691 | * task: pointer to sas_task struct of interest | |
692 | * | |
693 | * Returns: TMF_RESP_FUNC_COMPLETE if the task is not in the task set, | |
694 | * or TMF_RESP_FUNC_SUCC if the task is in the task set. | |
695 | * | |
696 | * Normally the management layer sets the task to aborted state, | |
697 | * and then calls query task and then abort task. | |
698 | */ | |
699 | int asd_query_task(struct sas_task *task) | |
700 | { | |
701 | struct asd_ascb *ascb = task->lldd_task; | |
702 | int index; | |
703 | ||
704 | if (ascb) { | |
705 | index = ascb->tc_index; | |
706 | return asd_initiate_ssp_tmf(task->dev, task->ssp_task.LUN, | |
707 | TMF_QUERY_TASK, index); | |
708 | } | |
709 | return TMF_RESP_FUNC_COMPLETE; | |
710 | } |