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fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / drivers / scsi / aic94xx / aic94xx_scb.c
blobdb6ab1a3b81e888f5ae9469c70285b6c6af0a965
1 /*
2 * Aic94xx SAS/SATA driver SCB management.
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 <scsi/scsi_host.h>
28
29 #include "aic94xx.h"
30 #include "aic94xx_reg.h"
31 #include "aic94xx_hwi.h"
32 #include "aic94xx_seq.h"
33
34 #include "aic94xx_dump.h"
35
36 /* ---------- EMPTY SCB ---------- */
37
38 #define DL_PHY_MASK 7
39 #define BYTES_DMAED 0
40 #define PRIMITIVE_RECVD 0x08
41 #define PHY_EVENT 0x10
42 #define LINK_RESET_ERROR 0x18
43 #define TIMER_EVENT 0x20
44 #define REQ_TASK_ABORT 0xF0
45 #define REQ_DEVICE_RESET 0xF1
46 #define SIGNAL_NCQ_ERROR 0xF2
47 #define CLEAR_NCQ_ERROR 0xF3
48
49 #define PHY_EVENTS_STATUS (CURRENT_LOSS_OF_SIGNAL | CURRENT_OOB_DONE \
50 | CURRENT_SPINUP_HOLD | CURRENT_GTO_TIMEOUT \
51 | CURRENT_OOB_ERROR)
52
53 static inline void get_lrate_mode(struct asd_phy *phy, u8 oob_mode)
54 {
55 struct sas_phy *sas_phy = phy->sas_phy.phy;
56
57 switch (oob_mode & 7) {
58 case PHY_SPEED_60:
59 /* FIXME: sas transport class doesn't have this */
60 phy->sas_phy.linkrate = SAS_LINK_RATE_6_0_GBPS;
61 phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_6_0_GBPS;
62 break;
63 case PHY_SPEED_30:
64 phy->sas_phy.linkrate = SAS_LINK_RATE_3_0_GBPS;
65 phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_3_0_GBPS;
66 break;
67 case PHY_SPEED_15:
68 phy->sas_phy.linkrate = SAS_LINK_RATE_1_5_GBPS;
69 phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_1_5_GBPS;
70 break;
71 }
72 sas_phy->negotiated_linkrate = phy->sas_phy.linkrate;
73 sas_phy->maximum_linkrate_hw = SAS_LINK_RATE_3_0_GBPS;
74 sas_phy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
75 sas_phy->maximum_linkrate = phy->phy_desc->max_sas_lrate;
76 sas_phy->minimum_linkrate = phy->phy_desc->min_sas_lrate;
77
78 if (oob_mode & SAS_MODE)
79 phy->sas_phy.oob_mode = SAS_OOB_MODE;
80 else if (oob_mode & SATA_MODE)
81 phy->sas_phy.oob_mode = SATA_OOB_MODE;
82 }
83
84 static inline void asd_phy_event_tasklet(struct asd_ascb *ascb,
85 struct done_list_struct *dl)
86 {
87 struct asd_ha_struct *asd_ha = ascb->ha;
88 struct sas_ha_struct *sas_ha = &asd_ha->sas_ha;
89 int phy_id = dl->status_block[0] & DL_PHY_MASK;
90 struct asd_phy *phy = &asd_ha->phys[phy_id];
91
92 u8 oob_status = dl->status_block[1] & PHY_EVENTS_STATUS;
93 u8 oob_mode = dl->status_block[2];
94
95 switch (oob_status) {
96 case CURRENT_LOSS_OF_SIGNAL:
97 /* directly attached device was removed */
98 ASD_DPRINTK("phy%d: device unplugged\n", phy_id);
99 asd_turn_led(asd_ha, phy_id, 0);
100 sas_phy_disconnected(&phy->sas_phy);
101 sas_ha->notify_phy_event(&phy->sas_phy, PHYE_LOSS_OF_SIGNAL);
102 break;
103 case CURRENT_OOB_DONE:
104 /* hot plugged device */
105 asd_turn_led(asd_ha, phy_id, 1);
106 get_lrate_mode(phy, oob_mode);
107 ASD_DPRINTK("phy%d device plugged: lrate:0x%x, proto:0x%x\n",
108 phy_id, phy->sas_phy.linkrate, phy->sas_phy.iproto);
109 sas_ha->notify_phy_event(&phy->sas_phy, PHYE_OOB_DONE);
110 break;
111 case CURRENT_SPINUP_HOLD:
112 /* hot plug SATA, no COMWAKE sent */
113 asd_turn_led(asd_ha, phy_id, 1);
114 sas_ha->notify_phy_event(&phy->sas_phy, PHYE_SPINUP_HOLD);
115 break;
116 case CURRENT_GTO_TIMEOUT:
117 case CURRENT_OOB_ERROR:
118 ASD_DPRINTK("phy%d error while OOB: oob status:0x%x\n", phy_id,
119 dl->status_block[1]);
120 asd_turn_led(asd_ha, phy_id, 0);
121 sas_phy_disconnected(&phy->sas_phy);
122 sas_ha->notify_phy_event(&phy->sas_phy, PHYE_OOB_ERROR);
123 break;
124 }
125 }
126
127 /* If phys are enabled sparsely, this will do the right thing. */
128 static inline unsigned ord_phy(struct asd_ha_struct *asd_ha,
129 struct asd_phy *phy)
130 {
131 u8 enabled_mask = asd_ha->hw_prof.enabled_phys;
132 int i, k = 0;
133
134 for_each_phy(enabled_mask, enabled_mask, i) {
135 if (&asd_ha->phys[i] == phy)
136 return k;
137 k++;
138 }
139 return 0;
140 }
141
142 /**
143 * asd_get_attached_sas_addr -- extract/generate attached SAS address
144 * phy: pointer to asd_phy
145 * sas_addr: pointer to buffer where the SAS address is to be written
146 *
147 * This function extracts the SAS address from an IDENTIFY frame
148 * received. If OOB is SATA, then a SAS address is generated from the
149 * HA tables.
150 *
151 * LOCKING: the frame_rcvd_lock needs to be held since this parses the frame
152 * buffer.
153 */
154 static inline void asd_get_attached_sas_addr(struct asd_phy *phy, u8 *sas_addr)
155 {
156 if (phy->sas_phy.frame_rcvd[0] == 0x34
157 && phy->sas_phy.oob_mode == SATA_OOB_MODE) {
158 struct asd_ha_struct *asd_ha = phy->sas_phy.ha->lldd_ha;
159 /* FIS device-to-host */
160 u64 addr = be64_to_cpu(*(__be64 *)phy->phy_desc->sas_addr);
161
162 addr += asd_ha->hw_prof.sata_name_base + ord_phy(asd_ha, phy);
163 *(__be64 *)sas_addr = cpu_to_be64(addr);
164 } else {
165 struct sas_identify_frame *idframe =
166 (void *) phy->sas_phy.frame_rcvd;
167 memcpy(sas_addr, idframe->sas_addr, SAS_ADDR_SIZE);
168 }
169 }
170
171 static void asd_form_port(struct asd_ha_struct *asd_ha, struct asd_phy *phy)
172 {
173 int i;
174 struct asd_port *free_port = NULL;
175 struct asd_port *port;
176 struct asd_sas_phy *sas_phy = &phy->sas_phy;
177 unsigned long flags;
178
179 spin_lock_irqsave(&asd_ha->asd_ports_lock, flags);
180 if (!phy->asd_port) {
181 for (i = 0; i < ASD_MAX_PHYS; i++) {
182 port = &asd_ha->asd_ports[i];
183
184 /* Check for wide port */
185 if (port->num_phys > 0 &&
186 memcmp(port->sas_addr, sas_phy->sas_addr,
187 SAS_ADDR_SIZE) == 0 &&
188 memcmp(port->attached_sas_addr,
189 sas_phy->attached_sas_addr,
190 SAS_ADDR_SIZE) == 0) {
191 break;
192 }
193
194 /* Find a free port */
195 if (port->num_phys == 0 && free_port == NULL) {
196 free_port = port;
197 }
198 }
199
200 /* Use a free port if this doesn't form a wide port */
201 if (i >= ASD_MAX_PHYS) {
202 port = free_port;
203 BUG_ON(!port);
204 memcpy(port->sas_addr, sas_phy->sas_addr,
205 SAS_ADDR_SIZE);
206 memcpy(port->attached_sas_addr,
207 sas_phy->attached_sas_addr,
208 SAS_ADDR_SIZE);
209 }
210 port->num_phys++;
211 port->phy_mask |= (1U << sas_phy->id);
212 phy->asd_port = port;
213 }
214 ASD_DPRINTK("%s: updating phy_mask 0x%x for phy%d\n",
215 __FUNCTION__, phy->asd_port->phy_mask, sas_phy->id);
216 asd_update_port_links(asd_ha, phy);
217 spin_unlock_irqrestore(&asd_ha->asd_ports_lock, flags);
218 }
219
220 static void asd_deform_port(struct asd_ha_struct *asd_ha, struct asd_phy *phy)
221 {
222 struct asd_port *port = phy->asd_port;
223 struct asd_sas_phy *sas_phy = &phy->sas_phy;
224 unsigned long flags;
225
226 spin_lock_irqsave(&asd_ha->asd_ports_lock, flags);
227 if (port) {
228 port->num_phys--;
229 port->phy_mask &= ~(1U << sas_phy->id);
230 phy->asd_port = NULL;
231 }
232 spin_unlock_irqrestore(&asd_ha->asd_ports_lock, flags);
233 }
234
235 static inline void asd_bytes_dmaed_tasklet(struct asd_ascb *ascb,
236 struct done_list_struct *dl,
237 int edb_id, int phy_id)
238 {
239 unsigned long flags;
240 int edb_el = edb_id + ascb->edb_index;
241 struct asd_dma_tok *edb = ascb->ha->seq.edb_arr[edb_el];
242 struct asd_phy *phy = &ascb->ha->phys[phy_id];
243 struct sas_ha_struct *sas_ha = phy->sas_phy.ha;
244 u16 size = ((dl->status_block[3] & 7) << 8) | dl->status_block[2];
245
246 size = min(size, (u16) sizeof(phy->frame_rcvd));
247
248 spin_lock_irqsave(&phy->sas_phy.frame_rcvd_lock, flags);
249 memcpy(phy->sas_phy.frame_rcvd, edb->vaddr, size);
250 phy->sas_phy.frame_rcvd_size = size;
251 asd_get_attached_sas_addr(phy, phy->sas_phy.attached_sas_addr);
252 spin_unlock_irqrestore(&phy->sas_phy.frame_rcvd_lock, flags);
253 asd_dump_frame_rcvd(phy, dl);
254 asd_form_port(ascb->ha, phy);
255 sas_ha->notify_port_event(&phy->sas_phy, PORTE_BYTES_DMAED);
256 }
257
258 static inline void asd_link_reset_err_tasklet(struct asd_ascb *ascb,
259 struct done_list_struct *dl,
260 int phy_id)
261 {
262 struct asd_ha_struct *asd_ha = ascb->ha;
263 struct sas_ha_struct *sas_ha = &asd_ha->sas_ha;
264 struct asd_sas_phy *sas_phy = sas_ha->sas_phy[phy_id];
265 struct asd_phy *phy = &asd_ha->phys[phy_id];
266 u8 lr_error = dl->status_block[1];
267 u8 retries_left = dl->status_block[2];
268
269 switch (lr_error) {
270 case 0:
271 ASD_DPRINTK("phy%d: Receive ID timer expired\n", phy_id);
272 break;
273 case 1:
274 ASD_DPRINTK("phy%d: Loss of signal\n", phy_id);
275 break;
276 case 2:
277 ASD_DPRINTK("phy%d: Loss of dword sync\n", phy_id);
278 break;
279 case 3:
280 ASD_DPRINTK("phy%d: Receive FIS timeout\n", phy_id);
281 break;
282 default:
283 ASD_DPRINTK("phy%d: unknown link reset error code: 0x%x\n",
284 phy_id, lr_error);
285 break;
286 }
287
288 asd_turn_led(asd_ha, phy_id, 0);
289 sas_phy_disconnected(sas_phy);
290 asd_deform_port(asd_ha, phy);
291 sas_ha->notify_port_event(sas_phy, PORTE_LINK_RESET_ERR);
292
293 if (retries_left == 0) {
294 int num = 1;
295 struct asd_ascb *cp = asd_ascb_alloc_list(ascb->ha, &num,
296 GFP_ATOMIC);
297 if (!cp) {
298 asd_printk("%s: out of memory\n", __FUNCTION__);
299 goto out;
300 }
301 ASD_DPRINTK("phy%d: retries:0 performing link reset seq\n",
302 phy_id);
303 asd_build_control_phy(cp, phy_id, ENABLE_PHY);
304 if (asd_post_ascb_list(ascb->ha, cp, 1) != 0)
305 asd_ascb_free(cp);
306 }
307 out:
308 ;
309 }
310
311 static inline void asd_primitive_rcvd_tasklet(struct asd_ascb *ascb,
312 struct done_list_struct *dl,
313 int phy_id)
314 {
315 unsigned long flags;
316 struct sas_ha_struct *sas_ha = &ascb->ha->sas_ha;
317 struct asd_sas_phy *sas_phy = sas_ha->sas_phy[phy_id];
318 struct asd_ha_struct *asd_ha = ascb->ha;
319 struct asd_phy *phy = &asd_ha->phys[phy_id];
320 u8 reg = dl->status_block[1];
321 u32 cont = dl->status_block[2] << ((reg & 3)*8);
322
323 reg &= ~3;
324 switch (reg) {
325 case LmPRMSTAT0BYTE0:
326 switch (cont) {
327 case LmBROADCH:
328 case LmBROADRVCH0:
329 case LmBROADRVCH1:
330 case LmBROADSES:
331 ASD_DPRINTK("phy%d: BROADCAST change received:%d\n",
332 phy_id, cont);
333 spin_lock_irqsave(&sas_phy->sas_prim_lock, flags);
334 sas_phy->sas_prim = ffs(cont);
335 spin_unlock_irqrestore(&sas_phy->sas_prim_lock, flags);
336 sas_ha->notify_port_event(sas_phy,PORTE_BROADCAST_RCVD);
337 break;
338
339 case LmUNKNOWNP:
340 ASD_DPRINTK("phy%d: unknown BREAK\n", phy_id);
341 break;
342
343 default:
344 ASD_DPRINTK("phy%d: primitive reg:0x%x, cont:0x%04x\n",
345 phy_id, reg, cont);
346 break;
347 }
348 break;
349 case LmPRMSTAT1BYTE0:
350 switch (cont) {
351 case LmHARDRST:
352 ASD_DPRINTK("phy%d: HARD_RESET primitive rcvd\n",
353 phy_id);
354 /* The sequencer disables all phys on that port.
355 * We have to re-enable the phys ourselves. */
356 asd_deform_port(asd_ha, phy);
357 sas_ha->notify_port_event(sas_phy, PORTE_HARD_RESET);
358 break;
359
360 default:
361 ASD_DPRINTK("phy%d: primitive reg:0x%x, cont:0x%04x\n",
362 phy_id, reg, cont);
363 break;
364 }
365 break;
366 default:
367 ASD_DPRINTK("unknown primitive register:0x%x\n",
368 dl->status_block[1]);
369 break;
370 }
371 }
372
373 /**
374 * asd_invalidate_edb -- invalidate an EDB and if necessary post the ESCB
375 * @ascb: pointer to Empty SCB
376 * @edb_id: index [0,6] to the empty data buffer which is to be invalidated
377 *
378 * After an EDB has been invalidated, if all EDBs in this ESCB have been
379 * invalidated, the ESCB is posted back to the sequencer.
380 * Context is tasklet/IRQ.
381 */
382 void asd_invalidate_edb(struct asd_ascb *ascb, int edb_id)
383 {
384 struct asd_seq_data *seq = &ascb->ha->seq;
385 struct empty_scb *escb = &ascb->scb->escb;
386 struct sg_el *eb = &escb->eb[edb_id];
387 struct asd_dma_tok *edb = seq->edb_arr[ascb->edb_index + edb_id];
388
389 memset(edb->vaddr, 0, ASD_EDB_SIZE);
390 eb->flags |= ELEMENT_NOT_VALID;
391 escb->num_valid--;
392
393 if (escb->num_valid == 0) {
394 int i;
395 /* ASD_DPRINTK("reposting escb: vaddr: 0x%p, "
396 "dma_handle: 0x%08llx, next: 0x%08llx, "
397 "index:%d, opcode:0x%02x\n",
398 ascb->dma_scb.vaddr,
399 (u64)ascb->dma_scb.dma_handle,
400 le64_to_cpu(ascb->scb->header.next_scb),
401 le16_to_cpu(ascb->scb->header.index),
402 ascb->scb->header.opcode);
403 */
404 escb->num_valid = ASD_EDBS_PER_SCB;
405 for (i = 0; i < ASD_EDBS_PER_SCB; i++)
406 escb->eb[i].flags = 0;
407 if (!list_empty(&ascb->list))
408 list_del_init(&ascb->list);
409 i = asd_post_escb_list(ascb->ha, ascb, 1);
410 if (i)
411 asd_printk("couldn't post escb, err:%d\n", i);
412 }
413 }
414
415 static void escb_tasklet_complete(struct asd_ascb *ascb,
416 struct done_list_struct *dl)
417 {
418 struct asd_ha_struct *asd_ha = ascb->ha;
419 struct sas_ha_struct *sas_ha = &asd_ha->sas_ha;
420 int edb = (dl->opcode & DL_PHY_MASK) - 1; /* [0xc1,0xc7] -> [0,6] */
421 u8 sb_opcode = dl->status_block[0];
422 int phy_id = sb_opcode & DL_PHY_MASK;
423 struct asd_sas_phy *sas_phy = sas_ha->sas_phy[phy_id];
424 struct asd_phy *phy = &asd_ha->phys[phy_id];
425
426 if (edb > 6 || edb < 0) {
427 ASD_DPRINTK("edb is 0x%x! dl->opcode is 0x%x\n",
428 edb, dl->opcode);
429 ASD_DPRINTK("sb_opcode : 0x%x, phy_id: 0x%x\n",
430 sb_opcode, phy_id);
431 ASD_DPRINTK("escb: vaddr: 0x%p, "
432 "dma_handle: 0x%llx, next: 0x%llx, "
433 "index:%d, opcode:0x%02x\n",
434 ascb->dma_scb.vaddr,
435 (unsigned long long)ascb->dma_scb.dma_handle,
436 (unsigned long long)
437 le64_to_cpu(ascb->scb->header.next_scb),
438 le16_to_cpu(ascb->scb->header.index),
439 ascb->scb->header.opcode);
440 }
441
442 /* Catch these before we mask off the sb_opcode bits */
443 switch (sb_opcode) {
444 case REQ_TASK_ABORT: {
445 struct asd_ascb *a, *b;
446 u16 tc_abort;
447 struct domain_device *failed_dev = NULL;
448
449 ASD_DPRINTK("%s: REQ_TASK_ABORT, reason=0x%X\n",
450 __FUNCTION__, dl->status_block[3]);
451
452 /*
453 * Find the task that caused the abort and abort it first.
454 * The sequencer won't put anything on the done list until
455 * that happens.
456 */
457 tc_abort = *((u16*)(&dl->status_block[1]));
458 tc_abort = le16_to_cpu(tc_abort);
459
460 list_for_each_entry_safe(a, b, &asd_ha->seq.pend_q, list) {
461 struct sas_task *task = ascb->uldd_task;
462
463 if (task && a->tc_index == tc_abort) {
464 failed_dev = task->dev;
465 sas_task_abort(task);
466 break;
467 }
468 }
469
470 if (!failed_dev) {
471 ASD_DPRINTK("%s: Can't find task (tc=%d) to abort!\n",
472 __FUNCTION__, tc_abort);
473 goto out;
474 }
475
476 /*
477 * Now abort everything else for that device (hba?) so
478 * that the EH will wake up and do something.
479 */
480 list_for_each_entry_safe(a, b, &asd_ha->seq.pend_q, list) {
481 struct sas_task *task = ascb->uldd_task;
482
483 if (task &&
484 task->dev == failed_dev &&
485 a->tc_index != tc_abort)
486 sas_task_abort(task);
487 }
488
489 goto out;
490 }
491 case REQ_DEVICE_RESET: {
492 struct asd_ascb *a;
493 u16 conn_handle;
494 unsigned long flags;
495 struct sas_task *last_dev_task = NULL;
496
497 conn_handle = *((u16*)(&dl->status_block[1]));
498 conn_handle = le16_to_cpu(conn_handle);
499
500 ASD_DPRINTK("%s: REQ_DEVICE_RESET, reason=0x%X\n", __FUNCTION__,
501 dl->status_block[3]);
502
503 /* Find the last pending task for the device... */
504 list_for_each_entry(a, &asd_ha->seq.pend_q, list) {
505 u16 x;
506 struct domain_device *dev;
507 struct sas_task *task = a->uldd_task;
508
509 if (!task)
510 continue;
511 dev = task->dev;
512
513 x = (unsigned long)dev->lldd_dev;
514 if (x == conn_handle)
515 last_dev_task = task;
516 }
517
518 if (!last_dev_task) {
519 ASD_DPRINTK("%s: Device reset for idle device %d?\n",
520 __FUNCTION__, conn_handle);
521 goto out;
522 }
523
524 /* ...and set the reset flag */
525 spin_lock_irqsave(&last_dev_task->task_state_lock, flags);
526 last_dev_task->task_state_flags |= SAS_TASK_NEED_DEV_RESET;
527 spin_unlock_irqrestore(&last_dev_task->task_state_lock, flags);
528
529 /* Kill all pending tasks for the device */
530 list_for_each_entry(a, &asd_ha->seq.pend_q, list) {
531 u16 x;
532 struct domain_device *dev;
533 struct sas_task *task = a->uldd_task;
534
535 if (!task)
536 continue;
537 dev = task->dev;
538
539 x = (unsigned long)dev->lldd_dev;
540 if (x == conn_handle)
541 sas_task_abort(task);
542 }
543
544 goto out;
545 }
546 case SIGNAL_NCQ_ERROR:
547 ASD_DPRINTK("%s: SIGNAL_NCQ_ERROR\n", __FUNCTION__);
548 goto out;
549 case CLEAR_NCQ_ERROR:
550 ASD_DPRINTK("%s: CLEAR_NCQ_ERROR\n", __FUNCTION__);
551 goto out;
552 }
553
554 sb_opcode &= ~DL_PHY_MASK;
555
556 switch (sb_opcode) {
557 case BYTES_DMAED:
558 ASD_DPRINTK("%s: phy%d: BYTES_DMAED\n", __FUNCTION__, phy_id);
559 asd_bytes_dmaed_tasklet(ascb, dl, edb, phy_id);
560 break;
561 case PRIMITIVE_RECVD:
562 ASD_DPRINTK("%s: phy%d: PRIMITIVE_RECVD\n", __FUNCTION__,
563 phy_id);
564 asd_primitive_rcvd_tasklet(ascb, dl, phy_id);
565 break;
566 case PHY_EVENT:
567 ASD_DPRINTK("%s: phy%d: PHY_EVENT\n", __FUNCTION__, phy_id);
568 asd_phy_event_tasklet(ascb, dl);
569 break;
570 case LINK_RESET_ERROR:
571 ASD_DPRINTK("%s: phy%d: LINK_RESET_ERROR\n", __FUNCTION__,
572 phy_id);
573 asd_link_reset_err_tasklet(ascb, dl, phy_id);
574 break;
575 case TIMER_EVENT:
576 ASD_DPRINTK("%s: phy%d: TIMER_EVENT, lost dw sync\n",
577 __FUNCTION__, phy_id);
578 asd_turn_led(asd_ha, phy_id, 0);
579 /* the device is gone */
580 sas_phy_disconnected(sas_phy);
581 asd_deform_port(asd_ha, phy);
582 sas_ha->notify_port_event(sas_phy, PORTE_TIMER_EVENT);
583 break;
584 default:
585 ASD_DPRINTK("%s: phy%d: unknown event:0x%x\n", __FUNCTION__,
586 phy_id, sb_opcode);
587 ASD_DPRINTK("edb is 0x%x! dl->opcode is 0x%x\n",
588 edb, dl->opcode);
589 ASD_DPRINTK("sb_opcode : 0x%x, phy_id: 0x%x\n",
590 sb_opcode, phy_id);
591 ASD_DPRINTK("escb: vaddr: 0x%p, "
592 "dma_handle: 0x%llx, next: 0x%llx, "
593 "index:%d, opcode:0x%02x\n",
594 ascb->dma_scb.vaddr,
595 (unsigned long long)ascb->dma_scb.dma_handle,
596 (unsigned long long)
597 le64_to_cpu(ascb->scb->header.next_scb),
598 le16_to_cpu(ascb->scb->header.index),
599 ascb->scb->header.opcode);
600
601 break;
602 }
603 out:
604 asd_invalidate_edb(ascb, edb);
605 }
606
607 int asd_init_post_escbs(struct asd_ha_struct *asd_ha)
608 {
609 struct asd_seq_data *seq = &asd_ha->seq;
610 int i;
611
612 for (i = 0; i < seq->num_escbs; i++)
613 seq->escb_arr[i]->tasklet_complete = escb_tasklet_complete;
614
615 ASD_DPRINTK("posting %d escbs\n", i);
616 return asd_post_escb_list(asd_ha, seq->escb_arr[0], seq->num_escbs);
617 }
618
619 /* ---------- CONTROL PHY ---------- */
620
621 #define CONTROL_PHY_STATUS (CURRENT_DEVICE_PRESENT | CURRENT_OOB_DONE \
622 | CURRENT_SPINUP_HOLD | CURRENT_GTO_TIMEOUT \
623 | CURRENT_OOB_ERROR)
624
625 /**
626 * control_phy_tasklet_complete -- tasklet complete for CONTROL PHY ascb
627 * @ascb: pointer to an ascb
628 * @dl: pointer to the done list entry
629 *
630 * This function completes a CONTROL PHY scb and frees the ascb.
631 * A note on LEDs:
632 * - an LED blinks if there is IO though it,
633 * - if a device is connected to the LED, it is lit,
634 * - if no device is connected to the LED, is is dimmed (off).
635 */
636 static void control_phy_tasklet_complete(struct asd_ascb *ascb,
637 struct done_list_struct *dl)
638 {
639 struct asd_ha_struct *asd_ha = ascb->ha;
640 struct scb *scb = ascb->scb;
641 struct control_phy *control_phy = &scb->control_phy;
642 u8 phy_id = control_phy->phy_id;
643 struct asd_phy *phy = &ascb->ha->phys[phy_id];
644
645 u8 status = dl->status_block[0];
646 u8 oob_status = dl->status_block[1];
647 u8 oob_mode = dl->status_block[2];
648 /* u8 oob_signals= dl->status_block[3]; */
649
650 if (status != 0) {
651 ASD_DPRINTK("%s: phy%d status block opcode:0x%x\n",
652 __FUNCTION__, phy_id, status);
653 goto out;
654 }
655
656 switch (control_phy->sub_func) {
657 case DISABLE_PHY:
658 asd_ha->hw_prof.enabled_phys &= ~(1 << phy_id);
659 asd_turn_led(asd_ha, phy_id, 0);
660 asd_control_led(asd_ha, phy_id, 0);
661 ASD_DPRINTK("%s: disable phy%d\n", __FUNCTION__, phy_id);
662 break;
663
664 case ENABLE_PHY:
665 asd_control_led(asd_ha, phy_id, 1);
666 if (oob_status & CURRENT_OOB_DONE) {
667 asd_ha->hw_prof.enabled_phys |= (1 << phy_id);
668 get_lrate_mode(phy, oob_mode);
669 asd_turn_led(asd_ha, phy_id, 1);
670 ASD_DPRINTK("%s: phy%d, lrate:0x%x, proto:0x%x\n",
671 __FUNCTION__, phy_id,phy->sas_phy.linkrate,
672 phy->sas_phy.iproto);
673 } else if (oob_status & CURRENT_SPINUP_HOLD) {
674 asd_ha->hw_prof.enabled_phys |= (1 << phy_id);
675 asd_turn_led(asd_ha, phy_id, 1);
676 ASD_DPRINTK("%s: phy%d, spinup hold\n", __FUNCTION__,
677 phy_id);
678 } else if (oob_status & CURRENT_ERR_MASK) {
679 asd_turn_led(asd_ha, phy_id, 0);
680 ASD_DPRINTK("%s: phy%d: error: oob status:0x%02x\n",
681 __FUNCTION__, phy_id, oob_status);
682 } else if (oob_status & (CURRENT_HOT_PLUG_CNCT
683 | CURRENT_DEVICE_PRESENT)) {
684 asd_ha->hw_prof.enabled_phys |= (1 << phy_id);
685 asd_turn_led(asd_ha, phy_id, 1);
686 ASD_DPRINTK("%s: phy%d: hot plug or device present\n",
687 __FUNCTION__, phy_id);
688 } else {
689 asd_ha->hw_prof.enabled_phys |= (1 << phy_id);
690 asd_turn_led(asd_ha, phy_id, 0);
691 ASD_DPRINTK("%s: phy%d: no device present: "
692 "oob_status:0x%x\n",
693 __FUNCTION__, phy_id, oob_status);
694 }
695 break;
696 case RELEASE_SPINUP_HOLD:
697 case PHY_NO_OP:
698 case EXECUTE_HARD_RESET:
699 ASD_DPRINTK("%s: phy%d: sub_func:0x%x\n", __FUNCTION__,
700 phy_id, control_phy->sub_func);
701 /* XXX finish */
702 break;
703 default:
704 ASD_DPRINTK("%s: phy%d: sub_func:0x%x?\n", __FUNCTION__,
705 phy_id, control_phy->sub_func);
706 break;
707 }
708 out:
709 asd_ascb_free(ascb);
710 }
711
712 static inline void set_speed_mask(u8 *speed_mask, struct asd_phy_desc *pd)
713 {
714 /* disable all speeds, then enable defaults */
715 *speed_mask = SAS_SPEED_60_DIS | SAS_SPEED_30_DIS | SAS_SPEED_15_DIS
716 | SATA_SPEED_30_DIS | SATA_SPEED_15_DIS;
717
718 switch (pd->max_sas_lrate) {
719 case SAS_LINK_RATE_6_0_GBPS:
720 *speed_mask &= ~SAS_SPEED_60_DIS;
721 default:
722 case SAS_LINK_RATE_3_0_GBPS:
723 *speed_mask &= ~SAS_SPEED_30_DIS;
724 case SAS_LINK_RATE_1_5_GBPS:
725 *speed_mask &= ~SAS_SPEED_15_DIS;
726 }
727
728 switch (pd->min_sas_lrate) {
729 case SAS_LINK_RATE_6_0_GBPS:
730 *speed_mask |= SAS_SPEED_30_DIS;
731 case SAS_LINK_RATE_3_0_GBPS:
732 *speed_mask |= SAS_SPEED_15_DIS;
733 default:
734 case SAS_LINK_RATE_1_5_GBPS:
735 /* nothing to do */
736 ;
737 }
738
739 switch (pd->max_sata_lrate) {
740 case SAS_LINK_RATE_3_0_GBPS:
741 *speed_mask &= ~SATA_SPEED_30_DIS;
742 default:
743 case SAS_LINK_RATE_1_5_GBPS:
744 *speed_mask &= ~SATA_SPEED_15_DIS;
745 }
746
747 switch (pd->min_sata_lrate) {
748 case SAS_LINK_RATE_3_0_GBPS:
749 *speed_mask |= SATA_SPEED_15_DIS;
750 default:
751 case SAS_LINK_RATE_1_5_GBPS:
752 /* nothing to do */
753 ;
754 }
755 }
756
757 /**
758 * asd_build_control_phy -- build a CONTROL PHY SCB
759 * @ascb: pointer to an ascb
760 * @phy_id: phy id to control, integer
761 * @subfunc: subfunction, what to actually to do the phy
762 *
763 * This function builds a CONTROL PHY scb. No allocation of any kind
764 * is performed. @ascb is allocated with the list function.
765 * The caller can override the ascb->tasklet_complete to point
766 * to its own callback function. It must call asd_ascb_free()
767 * at its tasklet complete function.
768 * See the default implementation.
769 */
770 void asd_build_control_phy(struct asd_ascb *ascb, int phy_id, u8 subfunc)
771 {
772 struct asd_phy *phy = &ascb->ha->phys[phy_id];
773 struct scb *scb = ascb->scb;
774 struct control_phy *control_phy = &scb->control_phy;
775
776 scb->header.opcode = CONTROL_PHY;
777 control_phy->phy_id = (u8) phy_id;
778 control_phy->sub_func = subfunc;
779
780 switch (subfunc) {
781 case EXECUTE_HARD_RESET: /* 0x81 */
782 case ENABLE_PHY: /* 0x01 */
783 /* decide hot plug delay */
784 control_phy->hot_plug_delay = HOTPLUG_DELAY_TIMEOUT;
785
786 /* decide speed mask */
787 set_speed_mask(&control_phy->speed_mask, phy->phy_desc);
788
789 /* initiator port settings are in the hi nibble */
790 if (phy->sas_phy.role == PHY_ROLE_INITIATOR)
791 control_phy->port_type = SAS_PROTO_ALL << 4;
792 else if (phy->sas_phy.role == PHY_ROLE_TARGET)
793 control_phy->port_type = SAS_PROTO_ALL;
794 else
795 control_phy->port_type =
796 (SAS_PROTO_ALL << 4) | SAS_PROTO_ALL;
797
798 /* link reset retries, this should be nominal */
799 control_phy->link_reset_retries = 10;
800
801 case RELEASE_SPINUP_HOLD: /* 0x02 */
802 /* decide the func_mask */
803 control_phy->func_mask = FUNCTION_MASK_DEFAULT;
804 if (phy->phy_desc->flags & ASD_SATA_SPINUP_HOLD)
805 control_phy->func_mask &= ~SPINUP_HOLD_DIS;
806 else
807 control_phy->func_mask |= SPINUP_HOLD_DIS;
808 }
809
810 control_phy->conn_handle = cpu_to_le16(0xFFFF);
811
812 ascb->tasklet_complete = control_phy_tasklet_complete;
813 }
814
815 /* ---------- INITIATE LINK ADM TASK ---------- */
816
817 static void link_adm_tasklet_complete(struct asd_ascb *ascb,
818 struct done_list_struct *dl)
819 {
820 u8 opcode = dl->opcode;
821 struct initiate_link_adm *link_adm = &ascb->scb->link_adm;
822 u8 phy_id = link_adm->phy_id;
823
824 if (opcode != TC_NO_ERROR) {
825 asd_printk("phy%d: link adm task 0x%x completed with error "
826 "0x%x\n", phy_id, link_adm->sub_func, opcode);
827 }
828 ASD_DPRINTK("phy%d: link adm task 0x%x: 0x%x\n",
829 phy_id, link_adm->sub_func, opcode);
830
831 asd_ascb_free(ascb);
832 }
833
834 void asd_build_initiate_link_adm_task(struct asd_ascb *ascb, int phy_id,
835 u8 subfunc)
836 {
837 struct scb *scb = ascb->scb;
838 struct initiate_link_adm *link_adm = &scb->link_adm;
839
840 scb->header.opcode = INITIATE_LINK_ADM_TASK;
841
842 link_adm->phy_id = phy_id;
843 link_adm->sub_func = subfunc;
844 link_adm->conn_handle = cpu_to_le16(0xFFFF);
845
846 ascb->tasklet_complete = link_adm_tasklet_complete;
847 }
848
849 /* ---------- SCB timer ---------- */
850
851 /**
852 * asd_ascb_timedout -- called when a pending SCB's timer has expired
853 * @data: unsigned long, a pointer to the ascb in question
854 *
855 * This is the default timeout function which does the most necessary.
856 * Upper layers can implement their own timeout function, say to free
857 * resources they have with this SCB, and then call this one at the
858 * end of their timeout function. To do this, one should initialize
859 * the ascb->timer.{function, data, expires} prior to calling the post
860 * funcion. The timer is started by the post function.
861 */
862 void asd_ascb_timedout(unsigned long data)
863 {
864 struct asd_ascb *ascb = (void *) data;
865 struct asd_seq_data *seq = &ascb->ha->seq;
866 unsigned long flags;
867
868 ASD_DPRINTK("scb:0x%x timed out\n", ascb->scb->header.opcode);
869
870 spin_lock_irqsave(&seq->pend_q_lock, flags);
871 seq->pending--;
872 list_del_init(&ascb->list);
873 spin_unlock_irqrestore(&seq->pend_q_lock, flags);
874
875 asd_ascb_free(ascb);
876 }
877
878 /* ---------- CONTROL PHY ---------- */
879
880 /* Given the spec value, return a driver value. */
881 static const int phy_func_table[] = {
882 [PHY_FUNC_NOP] = PHY_NO_OP,
883 [PHY_FUNC_LINK_RESET] = ENABLE_PHY,
884 [PHY_FUNC_HARD_RESET] = EXECUTE_HARD_RESET,
885 [PHY_FUNC_DISABLE] = DISABLE_PHY,
886 [PHY_FUNC_RELEASE_SPINUP_HOLD] = RELEASE_SPINUP_HOLD,
887 };
888
889 int asd_control_phy(struct asd_sas_phy *phy, enum phy_func func, void *arg)
890 {
891 struct asd_ha_struct *asd_ha = phy->ha->lldd_ha;
892 struct asd_phy_desc *pd = asd_ha->phys[phy->id].phy_desc;
893 struct asd_ascb *ascb;
894 struct sas_phy_linkrates *rates;
895 int res = 1;
896
897 switch (func) {
898 case PHY_FUNC_CLEAR_ERROR_LOG:
899 return -ENOSYS;
900 case PHY_FUNC_SET_LINK_RATE:
901 rates = arg;
902 if (rates->minimum_linkrate) {
903 pd->min_sas_lrate = rates->minimum_linkrate;
904 pd->min_sata_lrate = rates->minimum_linkrate;
905 }
906 if (rates->maximum_linkrate) {
907 pd->max_sas_lrate = rates->maximum_linkrate;
908 pd->max_sata_lrate = rates->maximum_linkrate;
909 }
910 func = PHY_FUNC_LINK_RESET;
911 break;
912 default:
913 break;
914 }
915
916 ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL);
917 if (!ascb)
918 return -ENOMEM;
919
920 asd_build_control_phy(ascb, phy->id, phy_func_table[func]);
921 res = asd_post_ascb_list(asd_ha, ascb , 1);
922 if (res)
923 asd_ascb_free(ascb);
924
925 return res;
926 }
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