projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[SCSI] scsi_transport_sas: make minimum and maximum linkrate settable quantities
[linux-2.6-block.git] / drivers / scsi / aic94xx / aic94xx_scb.c
CommitLineData
2908d778
JB		 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 <linux/pci.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
53static inline void get_lrate_mode(struct asd_phy *phy, u8 oob_mode)
54{
55 switch (oob_mode & 7) {
56 case PHY_SPEED_60:
57 /* FIXME: sas transport class doesn't have this */
88edf746 58 phy->sas_phy.linkrate = SAS_LINK_RATE_6_0_GBPS;
2908d778
JB		 59 phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_6_0_GBPS;
60 break;
61 case PHY_SPEED_30:
88edf746 62 phy->sas_phy.linkrate = SAS_LINK_RATE_3_0_GBPS;
2908d778
JB		 63 phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_3_0_GBPS;
64 break;
65 case PHY_SPEED_15:
88edf746 66 phy->sas_phy.linkrate = SAS_LINK_RATE_1_5_GBPS;
2908d778
JB		 67 phy->sas_phy.phy->negotiated_linkrate = SAS_LINK_RATE_1_5_GBPS;
68 break;
69 }
70 if (oob_mode & SAS_MODE)
71 phy->sas_phy.oob_mode = SAS_OOB_MODE;
72 else if (oob_mode & SATA_MODE)
73 phy->sas_phy.oob_mode = SATA_OOB_MODE;
74}
75
76static inline void asd_phy_event_tasklet(struct asd_ascb *ascb,
77 struct done_list_struct *dl)
78{
79 struct asd_ha_struct *asd_ha = ascb->ha;
80 struct sas_ha_struct *sas_ha = &asd_ha->sas_ha;
81 int phy_id = dl->status_block[0] & DL_PHY_MASK;
82 struct asd_phy *phy = &asd_ha->phys[phy_id];
83
84 u8 oob_status = dl->status_block[1] & PHY_EVENTS_STATUS;
85 u8 oob_mode = dl->status_block[2];
86
87 switch (oob_status) {
88 case CURRENT_LOSS_OF_SIGNAL:
89 /* directly attached device was removed */
90 ASD_DPRINTK("phy%d: device unplugged\n", phy_id);
91 asd_turn_led(asd_ha, phy_id, 0);
92 sas_phy_disconnected(&phy->sas_phy);
93 sas_ha->notify_phy_event(&phy->sas_phy, PHYE_LOSS_OF_SIGNAL);
94 break;
95 case CURRENT_OOB_DONE:
96 /* hot plugged device */
97 asd_turn_led(asd_ha, phy_id, 1);
98 get_lrate_mode(phy, oob_mode);
99 ASD_DPRINTK("phy%d device plugged: lrate:0x%x, proto:0x%x\n",
100 phy_id, phy->sas_phy.linkrate, phy->sas_phy.iproto);
101 sas_ha->notify_phy_event(&phy->sas_phy, PHYE_OOB_DONE);
102 break;
103 case CURRENT_SPINUP_HOLD:
104 /* hot plug SATA, no COMWAKE sent */
105 asd_turn_led(asd_ha, phy_id, 1);
106 sas_ha->notify_phy_event(&phy->sas_phy, PHYE_SPINUP_HOLD);
107 break;
108 case CURRENT_GTO_TIMEOUT:
109 case CURRENT_OOB_ERROR:
110 ASD_DPRINTK("phy%d error while OOB: oob status:0x%x\n", phy_id,
111 dl->status_block[1]);
112 asd_turn_led(asd_ha, phy_id, 0);
113 sas_phy_disconnected(&phy->sas_phy);
114 sas_ha->notify_phy_event(&phy->sas_phy, PHYE_OOB_ERROR);
115 break;
116 }
117}
118
119/* If phys are enabled sparsely, this will do the right thing. */
120static inline unsigned ord_phy(struct asd_ha_struct *asd_ha,
121 struct asd_phy *phy)
122{
123 u8 enabled_mask = asd_ha->hw_prof.enabled_phys;
124 int i, k = 0;
125
126 for_each_phy(enabled_mask, enabled_mask, i) {
127 if (&asd_ha->phys[i] == phy)
128 return k;
129 k++;
130 }
131 return 0;
132}
133
134/**
135 * asd_get_attached_sas_addr -- extract/generate attached SAS address
136 * phy: pointer to asd_phy
137 * sas_addr: pointer to buffer where the SAS address is to be written
138 *
139 * This function extracts the SAS address from an IDENTIFY frame
140 * received. If OOB is SATA, then a SAS address is generated from the
141 * HA tables.
142 *
143 * LOCKING: the frame_rcvd_lock needs to be held since this parses the frame
144 * buffer.
145 */
146static inline void asd_get_attached_sas_addr(struct asd_phy *phy, u8 *sas_addr)
147{
148 if (phy->sas_phy.frame_rcvd[0] == 0x34
149 && phy->sas_phy.oob_mode == SATA_OOB_MODE) {
150 struct asd_ha_struct *asd_ha = phy->sas_phy.ha->lldd_ha;
151 /* FIS device-to-host */
152 u64 addr = be64_to_cpu(*(__be64 *)phy->phy_desc->sas_addr);
153
154 addr += asd_ha->hw_prof.sata_name_base + ord_phy(asd_ha, phy);
155 *(__be64 *)sas_addr = cpu_to_be64(addr);
156 } else {
157 struct sas_identify_frame *idframe =
158 (void *) phy->sas_phy.frame_rcvd;
159 memcpy(sas_addr, idframe->sas_addr, SAS_ADDR_SIZE);
160 }
161}
162
163static inline void asd_bytes_dmaed_tasklet(struct asd_ascb *ascb,
164 struct done_list_struct *dl,
165 int edb_id, int phy_id)
166{
167 unsigned long flags;
168 int edb_el = edb_id + ascb->edb_index;
169 struct asd_dma_tok *edb = ascb->ha->seq.edb_arr[edb_el];
170 struct asd_phy *phy = &ascb->ha->phys[phy_id];
171 struct sas_ha_struct *sas_ha = phy->sas_phy.ha;
172 u16 size = ((dl->status_block[3] & 7) << 8) | dl->status_block[2];
173
174 size = min(size, (u16) sizeof(phy->frame_rcvd));
175
176 spin_lock_irqsave(&phy->sas_phy.frame_rcvd_lock, flags);
177 memcpy(phy->sas_phy.frame_rcvd, edb->vaddr, size);
178 phy->sas_phy.frame_rcvd_size = size;
179 asd_get_attached_sas_addr(phy, phy->sas_phy.attached_sas_addr);
180 spin_unlock_irqrestore(&phy->sas_phy.frame_rcvd_lock, flags);
181 asd_dump_frame_rcvd(phy, dl);
182 sas_ha->notify_port_event(&phy->sas_phy, PORTE_BYTES_DMAED);
183}
184
185static inline void asd_link_reset_err_tasklet(struct asd_ascb *ascb,
186 struct done_list_struct *dl,
187 int phy_id)
188{
189 struct asd_ha_struct *asd_ha = ascb->ha;
190 struct sas_ha_struct *sas_ha = &asd_ha->sas_ha;
191 struct asd_sas_phy *sas_phy = sas_ha->sas_phy[phy_id];
192 u8 lr_error = dl->status_block[1];
193 u8 retries_left = dl->status_block[2];
194
195 switch (lr_error) {
196 case 0:
197 ASD_DPRINTK("phy%d: Receive ID timer expired\n", phy_id);
198 break;
199 case 1:
200 ASD_DPRINTK("phy%d: Loss of signal\n", phy_id);
201 break;
202 case 2:
203 ASD_DPRINTK("phy%d: Loss of dword sync\n", phy_id);
204 break;
205 case 3:
206 ASD_DPRINTK("phy%d: Receive FIS timeout\n", phy_id);
207 break;
208 default:
209 ASD_DPRINTK("phy%d: unknown link reset error code: 0x%x\n",
210 phy_id, lr_error);
211 break;
212 }
213
214 asd_turn_led(asd_ha, phy_id, 0);
215 sas_phy_disconnected(sas_phy);
216 sas_ha->notify_port_event(sas_phy, PORTE_LINK_RESET_ERR);
217
218 if (retries_left == 0) {
219 int num = 1;
220 struct asd_ascb *cp = asd_ascb_alloc_list(ascb->ha, &num,
221 GFP_ATOMIC);
222 if (!cp) {
223 asd_printk("%s: out of memory\n", __FUNCTION__);
224 goto out;
225 }
226 ASD_DPRINTK("phy%d: retries:0 performing link reset seq\n",
227 phy_id);
228 asd_build_control_phy(cp, phy_id, ENABLE_PHY);
229 if (asd_post_ascb_list(ascb->ha, cp, 1) != 0)
230 asd_ascb_free(cp);
231 }
232out:
233 ;
234}
235
236static inline void asd_primitive_rcvd_tasklet(struct asd_ascb *ascb,
237 struct done_list_struct *dl,
238 int phy_id)
239{
240 unsigned long flags;
241 struct sas_ha_struct *sas_ha = &ascb->ha->sas_ha;
242 struct asd_sas_phy *sas_phy = sas_ha->sas_phy[phy_id];
243 u8 reg = dl->status_block[1];
244 u32 cont = dl->status_block[2] << ((reg & 3)*8);
245
246 reg &= ~3;
247 switch (reg) {
248 case LmPRMSTAT0BYTE0:
249 switch (cont) {
250 case LmBROADCH:
251 case LmBROADRVCH0:
252 case LmBROADRVCH1:
253 case LmBROADSES:
254 ASD_DPRINTK("phy%d: BROADCAST change received:%d\n",
255 phy_id, cont);
256 spin_lock_irqsave(&sas_phy->sas_prim_lock, flags);
257 sas_phy->sas_prim = ffs(cont);
258 spin_unlock_irqrestore(&sas_phy->sas_prim_lock, flags);
259 sas_ha->notify_port_event(sas_phy,PORTE_BROADCAST_RCVD);
260 break;
261
262 case LmUNKNOWNP:
263 ASD_DPRINTK("phy%d: unknown BREAK\n", phy_id);
264 break;
265
266 default:
267 ASD_DPRINTK("phy%d: primitive reg:0x%x, cont:0x%04x\n",
268 phy_id, reg, cont);
269 break;
270 }
271 break;
272 case LmPRMSTAT1BYTE0:
273 switch (cont) {
274 case LmHARDRST:
275 ASD_DPRINTK("phy%d: HARD_RESET primitive rcvd\n",
276 phy_id);
277 /* The sequencer disables all phys on that port.
278 * We have to re-enable the phys ourselves. */
279 sas_ha->notify_port_event(sas_phy, PORTE_HARD_RESET);
280 break;
281
282 default:
283 ASD_DPRINTK("phy%d: primitive reg:0x%x, cont:0x%04x\n",
284 phy_id, reg, cont);
285 break;
286 }
287 break;
288 default:
289 ASD_DPRINTK("unknown primitive register:0x%x\n",
290 dl->status_block[1]);
291 break;
292 }
293}
294
295/**
296 * asd_invalidate_edb -- invalidate an EDB and if necessary post the ESCB
297 * @ascb: pointer to Empty SCB
298 * @edb_id: index [0,6] to the empty data buffer which is to be invalidated
299 *
300 * After an EDB has been invalidated, if all EDBs in this ESCB have been
301 * invalidated, the ESCB is posted back to the sequencer.
302 * Context is tasklet/IRQ.
303 */
304void asd_invalidate_edb(struct asd_ascb *ascb, int edb_id)
305{
306 struct asd_seq_data *seq = &ascb->ha->seq;
307 struct empty_scb *escb = &ascb->scb->escb;
308 struct sg_el *eb = &escb->eb[edb_id];
309 struct asd_dma_tok *edb = seq->edb_arr[ascb->edb_index + edb_id];
310
311 memset(edb->vaddr, 0, ASD_EDB_SIZE);
312 eb->flags |= ELEMENT_NOT_VALID;
313 escb->num_valid--;
314
315 if (escb->num_valid == 0) {
316 int i;
317 /* ASD_DPRINTK("reposting escb: vaddr: 0x%p, "
318 "dma_handle: 0x%08llx, next: 0x%08llx, "
319 "index:%d, opcode:0x%02x\n",
320 ascb->dma_scb.vaddr,
321 (u64)ascb->dma_scb.dma_handle,
322 le64_to_cpu(ascb->scb->header.next_scb),
323 le16_to_cpu(ascb->scb->header.index),
324 ascb->scb->header.opcode);
325 */
326 escb->num_valid = ASD_EDBS_PER_SCB;
327 for (i = 0; i < ASD_EDBS_PER_SCB; i++)
328 escb->eb[i].flags = 0;
329 if (!list_empty(&ascb->list))
330 list_del_init(&ascb->list);
331 i = asd_post_escb_list(ascb->ha, ascb, 1);
332 if (i)
333 asd_printk("couldn't post escb, err:%d\n", i);
334 }
335}
336
337static void escb_tasklet_complete(struct asd_ascb *ascb,
338 struct done_list_struct *dl)
339{
340 struct asd_ha_struct *asd_ha = ascb->ha;
341 struct sas_ha_struct *sas_ha = &asd_ha->sas_ha;
342 int edb = (dl->opcode & DL_PHY_MASK) - 1; /* [0xc1,0xc7] -> [0,6] */
343 u8 sb_opcode = dl->status_block[0];
344 int phy_id = sb_opcode & DL_PHY_MASK;
345 struct asd_sas_phy *sas_phy = sas_ha->sas_phy[phy_id];
346
347 if (edb > 6 || edb < 0) {
348 ASD_DPRINTK("edb is 0x%x! dl->opcode is 0x%x\n",
349 edb, dl->opcode);
350 ASD_DPRINTK("sb_opcode : 0x%x, phy_id: 0x%x\n",
351 sb_opcode, phy_id);
352 ASD_DPRINTK("escb: vaddr: 0x%p, "
353 "dma_handle: 0x%llx, next: 0x%llx, "
354 "index:%d, opcode:0x%02x\n",
355 ascb->dma_scb.vaddr,
356 (unsigned long long)ascb->dma_scb.dma_handle,
357 (unsigned long long)
358 le64_to_cpu(ascb->scb->header.next_scb),
359 le16_to_cpu(ascb->scb->header.index),
360 ascb->scb->header.opcode);
361 }
362
363 sb_opcode &= ~DL_PHY_MASK;
364
365 switch (sb_opcode) {
366 case BYTES_DMAED:
367 ASD_DPRINTK("%s: phy%d: BYTES_DMAED\n", __FUNCTION__, phy_id);
368 asd_bytes_dmaed_tasklet(ascb, dl, edb, phy_id);
369 break;
370 case PRIMITIVE_RECVD:
371 ASD_DPRINTK("%s: phy%d: PRIMITIVE_RECVD\n", __FUNCTION__,
372 phy_id);
373 asd_primitive_rcvd_tasklet(ascb, dl, phy_id);
374 break;
375 case PHY_EVENT:
376 ASD_DPRINTK("%s: phy%d: PHY_EVENT\n", __FUNCTION__, phy_id);
377 asd_phy_event_tasklet(ascb, dl);
378 break;
379 case LINK_RESET_ERROR:
380 ASD_DPRINTK("%s: phy%d: LINK_RESET_ERROR\n", __FUNCTION__,
381 phy_id);
382 asd_link_reset_err_tasklet(ascb, dl, phy_id);
383 break;
384 case TIMER_EVENT:
385 ASD_DPRINTK("%s: phy%d: TIMER_EVENT, lost dw sync\n",
386 __FUNCTION__, phy_id);
387 asd_turn_led(asd_ha, phy_id, 0);
388 /* the device is gone */
389 sas_phy_disconnected(sas_phy);
390 sas_ha->notify_port_event(sas_phy, PORTE_TIMER_EVENT);
391 break;
392 case REQ_TASK_ABORT:
393 ASD_DPRINTK("%s: phy%d: REQ_TASK_ABORT\n", __FUNCTION__,
394 phy_id);
395 break;
396 case REQ_DEVICE_RESET:
397 ASD_DPRINTK("%s: phy%d: REQ_DEVICE_RESET\n", __FUNCTION__,
398 phy_id);
399 break;
400 case SIGNAL_NCQ_ERROR:
401 ASD_DPRINTK("%s: phy%d: SIGNAL_NCQ_ERROR\n", __FUNCTION__,
402 phy_id);
403 break;
404 case CLEAR_NCQ_ERROR:
405 ASD_DPRINTK("%s: phy%d: CLEAR_NCQ_ERROR\n", __FUNCTION__,
406 phy_id);
407 break;
408 default:
409 ASD_DPRINTK("%s: phy%d: unknown event:0x%x\n", __FUNCTION__,
410 phy_id, sb_opcode);
411 ASD_DPRINTK("edb is 0x%x! dl->opcode is 0x%x\n",
412 edb, dl->opcode);
413 ASD_DPRINTK("sb_opcode : 0x%x, phy_id: 0x%x\n",
414 sb_opcode, phy_id);
415 ASD_DPRINTK("escb: vaddr: 0x%p, "
416 "dma_handle: 0x%llx, next: 0x%llx, "
417 "index:%d, opcode:0x%02x\n",
418 ascb->dma_scb.vaddr,
419 (unsigned long long)ascb->dma_scb.dma_handle,
420 (unsigned long long)
421 le64_to_cpu(ascb->scb->header.next_scb),
422 le16_to_cpu(ascb->scb->header.index),
423 ascb->scb->header.opcode);
424
425 break;
426 }
427
428 asd_invalidate_edb(ascb, edb);
429}
430
431int asd_init_post_escbs(struct asd_ha_struct *asd_ha)
432{
433 struct asd_seq_data *seq = &asd_ha->seq;
434 int i;
435
436 for (i = 0; i < seq->num_escbs; i++)
437 seq->escb_arr[i]->tasklet_complete = escb_tasklet_complete;
438
439 ASD_DPRINTK("posting %d escbs\n", i);
440 return asd_post_escb_list(asd_ha, seq->escb_arr[0], seq->num_escbs);
441}
442
443/* ---------- CONTROL PHY ---------- */
444
445#define CONTROL_PHY_STATUS (CURRENT_DEVICE_PRESENT | CURRENT_OOB_DONE \
446 | CURRENT_SPINUP_HOLD | CURRENT_GTO_TIMEOUT \
447 | CURRENT_OOB_ERROR)
448
449/**
450 * control_phy_tasklet_complete -- tasklet complete for CONTROL PHY ascb
451 * @ascb: pointer to an ascb
452 * @dl: pointer to the done list entry
453 *
454 * This function completes a CONTROL PHY scb and frees the ascb.
455 * A note on LEDs:
456 * - an LED blinks if there is IO though it,
457 * - if a device is connected to the LED, it is lit,
458 * - if no device is connected to the LED, is is dimmed (off).
459 */
460static void control_phy_tasklet_complete(struct asd_ascb *ascb,
461 struct done_list_struct *dl)
462{
463 struct asd_ha_struct *asd_ha = ascb->ha;
464 struct scb *scb = ascb->scb;
465 struct control_phy *control_phy = &scb->control_phy;
466 u8 phy_id = control_phy->phy_id;
467 struct asd_phy *phy = &ascb->ha->phys[phy_id];
468
469 u8 status = dl->status_block[0];
470 u8 oob_status = dl->status_block[1];
471 u8 oob_mode = dl->status_block[2];
472 /* u8 oob_signals= dl->status_block[3]; */
473
474 if (status != 0) {
475 ASD_DPRINTK("%s: phy%d status block opcode:0x%x\n",
476 __FUNCTION__, phy_id, status);
477 goto out;
478 }
479
480 switch (control_phy->sub_func) {
481 case DISABLE_PHY:
482 asd_ha->hw_prof.enabled_phys &= ~(1 << phy_id);
483 asd_turn_led(asd_ha, phy_id, 0);
484 asd_control_led(asd_ha, phy_id, 0);
485 ASD_DPRINTK("%s: disable phy%d\n", __FUNCTION__, phy_id);
486 break;
487
488 case ENABLE_PHY:
489 asd_control_led(asd_ha, phy_id, 1);
490 if (oob_status & CURRENT_OOB_DONE) {
491 asd_ha->hw_prof.enabled_phys |= (1 << phy_id);
492 get_lrate_mode(phy, oob_mode);
493 asd_turn_led(asd_ha, phy_id, 1);
494 ASD_DPRINTK("%s: phy%d, lrate:0x%x, proto:0x%x\n",
495 __FUNCTION__, phy_id,phy->sas_phy.linkrate,
496 phy->sas_phy.iproto);
497 } else if (oob_status & CURRENT_SPINUP_HOLD) {
498 asd_ha->hw_prof.enabled_phys |= (1 << phy_id);
499 asd_turn_led(asd_ha, phy_id, 1);
500 ASD_DPRINTK("%s: phy%d, spinup hold\n", __FUNCTION__,
501 phy_id);
502 } else if (oob_status & CURRENT_ERR_MASK) {
503 asd_turn_led(asd_ha, phy_id, 0);
504 ASD_DPRINTK("%s: phy%d: error: oob status:0x%02x\n",
505 __FUNCTION__, phy_id, oob_status);
506 } else if (oob_status & (CURRENT_HOT_PLUG_CNCT
507 | CURRENT_DEVICE_PRESENT)) {
508 asd_ha->hw_prof.enabled_phys |= (1 << phy_id);
509 asd_turn_led(asd_ha, phy_id, 1);
510 ASD_DPRINTK("%s: phy%d: hot plug or device present\n",
511 __FUNCTION__, phy_id);
512 } else {
513 asd_ha->hw_prof.enabled_phys |= (1 << phy_id);
514 asd_turn_led(asd_ha, phy_id, 0);
515 ASD_DPRINTK("%s: phy%d: no device present: "
516 "oob_status:0x%x\n",
517 __FUNCTION__, phy_id, oob_status);
518 }
519 break;
520 case RELEASE_SPINUP_HOLD:
521 case PHY_NO_OP:
522 case EXECUTE_HARD_RESET:
523 ASD_DPRINTK("%s: phy%d: sub_func:0x%x\n", __FUNCTION__,
524 phy_id, control_phy->sub_func);
525 /* XXX finish */
526 break;
527 default:
528 ASD_DPRINTK("%s: phy%d: sub_func:0x%x?\n", __FUNCTION__,
529 phy_id, control_phy->sub_func);
530 break;
531 }
532out:
533 asd_ascb_free(ascb);
534}
535
536static inline void set_speed_mask(u8 *speed_mask, struct asd_phy_desc *pd)
537{
538 /* disable all speeds, then enable defaults */
539 *speed_mask = SAS_SPEED_60_DIS | SAS_SPEED_30_DIS | SAS_SPEED_15_DIS
540 | SATA_SPEED_30_DIS | SATA_SPEED_15_DIS;
541
542 switch (pd->max_sas_lrate) {
88edf746 543 case SAS_LINK_RATE_6_0_GBPS:
2908d778
JB		 544 *speed_mask &= ~SAS_SPEED_60_DIS;
545 default:
88edf746 546 case SAS_LINK_RATE_3_0_GBPS:
2908d778 547 *speed_mask &= ~SAS_SPEED_30_DIS;
88edf746 548 case SAS_LINK_RATE_1_5_GBPS:
2908d778
JB		 549 *speed_mask &= ~SAS_SPEED_15_DIS;
550 }
551
552 switch (pd->min_sas_lrate) {
88edf746 553 case SAS_LINK_RATE_6_0_GBPS:
2908d778 554 *speed_mask |= SAS_SPEED_30_DIS;
88edf746 555 case SAS_LINK_RATE_3_0_GBPS:
2908d778
JB		 556 *speed_mask |= SAS_SPEED_15_DIS;
557 default:
88edf746 558 case SAS_LINK_RATE_1_5_GBPS:
2908d778
JB		 559 /* nothing to do */
560 ;
561 }
562
563 switch (pd->max_sata_lrate) {
88edf746 564 case SAS_LINK_RATE_3_0_GBPS:
2908d778
JB		 565 *speed_mask &= ~SATA_SPEED_30_DIS;
566 default:
88edf746 567 case SAS_LINK_RATE_1_5_GBPS:
2908d778
JB		 568 *speed_mask &= ~SATA_SPEED_15_DIS;
569 }
570
571 switch (pd->min_sata_lrate) {
88edf746 572 case SAS_LINK_RATE_3_0_GBPS:
2908d778
JB		 573 *speed_mask |= SATA_SPEED_15_DIS;
574 default:
88edf746 575 case SAS_LINK_RATE_1_5_GBPS:
2908d778
JB		 576 /* nothing to do */
577 ;
578 }
579}
580
581/**
582 * asd_build_control_phy -- build a CONTROL PHY SCB
583 * @ascb: pointer to an ascb
584 * @phy_id: phy id to control, integer
585 * @subfunc: subfunction, what to actually to do the phy
586 *
587 * This function builds a CONTROL PHY scb. No allocation of any kind
588 * is performed. @ascb is allocated with the list function.
589 * The caller can override the ascb->tasklet_complete to point
590 * to its own callback function. It must call asd_ascb_free()
591 * at its tasklet complete function.
592 * See the default implementation.
593 */
594void asd_build_control_phy(struct asd_ascb *ascb, int phy_id, u8 subfunc)
595{
596 struct asd_phy *phy = &ascb->ha->phys[phy_id];
597 struct scb *scb = ascb->scb;
598 struct control_phy *control_phy = &scb->control_phy;
599
600 scb->header.opcode = CONTROL_PHY;
601 control_phy->phy_id = (u8) phy_id;
602 control_phy->sub_func = subfunc;
603
604 switch (subfunc) {
605 case EXECUTE_HARD_RESET: /* 0x81 */
606 case ENABLE_PHY: /* 0x01 */
607 /* decide hot plug delay */
608 control_phy->hot_plug_delay = HOTPLUG_DELAY_TIMEOUT;
609
610 /* decide speed mask */
611 set_speed_mask(&control_phy->speed_mask, phy->phy_desc);
612
613 /* initiator port settings are in the hi nibble */
614 if (phy->sas_phy.role == PHY_ROLE_INITIATOR)
615 control_phy->port_type = SAS_PROTO_ALL << 4;
616 else if (phy->sas_phy.role == PHY_ROLE_TARGET)
617 control_phy->port_type = SAS_PROTO_ALL;
618 else
619 control_phy->port_type =
620 (SAS_PROTO_ALL << 4) | SAS_PROTO_ALL;
621
622 /* link reset retries, this should be nominal */
623 control_phy->link_reset_retries = 10;
624
625 case RELEASE_SPINUP_HOLD: /* 0x02 */
626 /* decide the func_mask */
627 control_phy->func_mask = FUNCTION_MASK_DEFAULT;
628 if (phy->phy_desc->flags & ASD_SATA_SPINUP_HOLD)
629 control_phy->func_mask &= ~SPINUP_HOLD_DIS;
630 else
631 control_phy->func_mask |= SPINUP_HOLD_DIS;
632 }
633
634 control_phy->conn_handle = cpu_to_le16(0xFFFF);
635
636 ascb->tasklet_complete = control_phy_tasklet_complete;
637}
638
639/* ---------- INITIATE LINK ADM TASK ---------- */
640
641static void link_adm_tasklet_complete(struct asd_ascb *ascb,
642 struct done_list_struct *dl)
643{
644 u8 opcode = dl->opcode;
645 struct initiate_link_adm *link_adm = &ascb->scb->link_adm;
646 u8 phy_id = link_adm->phy_id;
647
648 if (opcode != TC_NO_ERROR) {
649 asd_printk("phy%d: link adm task 0x%x completed with error "
650 "0x%x\n", phy_id, link_adm->sub_func, opcode);
651 }
652 ASD_DPRINTK("phy%d: link adm task 0x%x: 0x%x\n",
653 phy_id, link_adm->sub_func, opcode);
654
655 asd_ascb_free(ascb);
656}
657
658void asd_build_initiate_link_adm_task(struct asd_ascb *ascb, int phy_id,
659 u8 subfunc)
660{
661 struct scb *scb = ascb->scb;
662 struct initiate_link_adm *link_adm = &scb->link_adm;
663
664 scb->header.opcode = INITIATE_LINK_ADM_TASK;
665
666 link_adm->phy_id = phy_id;
667 link_adm->sub_func = subfunc;
668 link_adm->conn_handle = cpu_to_le16(0xFFFF);
669
670 ascb->tasklet_complete = link_adm_tasklet_complete;
671}
672
673/* ---------- SCB timer ---------- */
674
675/**
676 * asd_ascb_timedout -- called when a pending SCB's timer has expired
677 * @data: unsigned long, a pointer to the ascb in question
678 *
679 * This is the default timeout function which does the most necessary.
680 * Upper layers can implement their own timeout function, say to free
681 * resources they have with this SCB, and then call this one at the
682 * end of their timeout function. To do this, one should initialize
683 * the ascb->timer.{function, data, expires} prior to calling the post
684 * funcion. The timer is started by the post function.
685 */
686void asd_ascb_timedout(unsigned long data)
687{
688 struct asd_ascb *ascb = (void *) data;
689 struct asd_seq_data *seq = &ascb->ha->seq;
690 unsigned long flags;
691
692 ASD_DPRINTK("scb:0x%x timed out\n", ascb->scb->header.opcode);
693
694 spin_lock_irqsave(&seq->pend_q_lock, flags);
695 seq->pending--;
696 list_del_init(&ascb->list);
697 spin_unlock_irqrestore(&seq->pend_q_lock, flags);
698
699 asd_ascb_free(ascb);
700}
701
702/* ---------- CONTROL PHY ---------- */
703
704/* Given the spec value, return a driver value. */
705static const int phy_func_table[] = {
706 [PHY_FUNC_NOP] = PHY_NO_OP,
707 [PHY_FUNC_LINK_RESET] = ENABLE_PHY,
708 [PHY_FUNC_HARD_RESET] = EXECUTE_HARD_RESET,
709 [PHY_FUNC_DISABLE] = DISABLE_PHY,
710 [PHY_FUNC_RELEASE_SPINUP_HOLD] = RELEASE_SPINUP_HOLD,
711};
712
713int asd_control_phy(struct asd_sas_phy *phy, enum phy_func func)
714{
715 struct asd_ha_struct *asd_ha = phy->ha->lldd_ha;
716 struct asd_ascb *ascb;
717 int res = 1;
718
719 if (func == PHY_FUNC_CLEAR_ERROR_LOG)
720 return -ENOSYS;
721
722 ascb = asd_ascb_alloc_list(asd_ha, &res, GFP_KERNEL);
723 if (!ascb)
724 return -ENOMEM;
725
726 asd_build_control_phy(ascb, phy->id, phy_func_table[func]);
727 res = asd_post_ascb_list(asd_ha, ascb , 1);
728 if (res)
729 asd_ascb_free(ascb);
730
731 return res;
732}
Linux 6.x block layer and io_uring tree(s)