2 * Serial Attached SCSI (SAS) Expander discovery and configuration
4 * Copyright (C) 2005 Adaptec, Inc. All rights reserved.
5 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
7 * This file is licensed under GPLv2.
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of the
12 * License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
25 #include <linux/scatterlist.h>
26 #include <linux/blkdev.h>
27 #include <linux/slab.h>
29 #include "sas_internal.h"
31 #include <scsi/sas_ata.h>
32 #include <scsi/scsi_transport.h>
33 #include <scsi/scsi_transport_sas.h>
34 #include "../scsi_sas_internal.h"
36 static int sas_discover_expander(struct domain_device *dev);
37 static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr);
38 static int sas_configure_phy(struct domain_device *dev, int phy_id,
39 u8 *sas_addr, int include);
40 static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr);
42 /* ---------- SMP task management ---------- */
44 static void smp_task_timedout(struct timer_list *t)
46 struct sas_task_slow *slow = from_timer(slow, t, timer);
47 struct sas_task *task = slow->task;
50 spin_lock_irqsave(&task->task_state_lock, flags);
51 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
52 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
53 spin_unlock_irqrestore(&task->task_state_lock, flags);
55 complete(&task->slow_task->completion);
58 static void smp_task_done(struct sas_task *task)
60 if (!del_timer(&task->slow_task->timer))
62 complete(&task->slow_task->completion);
65 /* Give it some long enough timeout. In seconds. */
66 #define SMP_TIMEOUT 10
68 static int smp_execute_task_sg(struct domain_device *dev,
69 struct scatterlist *req, struct scatterlist *resp)
72 struct sas_task *task = NULL;
73 struct sas_internal *i =
74 to_sas_internal(dev->port->ha->core.shost->transportt);
76 mutex_lock(&dev->ex_dev.cmd_mutex);
77 for (retry = 0; retry < 3; retry++) {
78 if (test_bit(SAS_DEV_GONE, &dev->state)) {
83 task = sas_alloc_slow_task(GFP_KERNEL);
89 task->task_proto = dev->tproto;
90 task->smp_task.smp_req = *req;
91 task->smp_task.smp_resp = *resp;
93 task->task_done = smp_task_done;
95 task->slow_task->timer.function = smp_task_timedout;
96 task->slow_task->timer.expires = jiffies + SMP_TIMEOUT*HZ;
97 add_timer(&task->slow_task->timer);
99 res = i->dft->lldd_execute_task(task, GFP_KERNEL);
102 del_timer(&task->slow_task->timer);
103 SAS_DPRINTK("executing SMP task failed:%d\n", res);
107 wait_for_completion(&task->slow_task->completion);
109 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
110 SAS_DPRINTK("smp task timed out or aborted\n");
111 i->dft->lldd_abort_task(task);
112 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
113 SAS_DPRINTK("SMP task aborted and not done\n");
117 if (task->task_status.resp == SAS_TASK_COMPLETE &&
118 task->task_status.stat == SAM_STAT_GOOD) {
122 if (task->task_status.resp == SAS_TASK_COMPLETE &&
123 task->task_status.stat == SAS_DATA_UNDERRUN) {
124 /* no error, but return the number of bytes of
126 res = task->task_status.residual;
129 if (task->task_status.resp == SAS_TASK_COMPLETE &&
130 task->task_status.stat == SAS_DATA_OVERRUN) {
134 if (task->task_status.resp == SAS_TASK_UNDELIVERED &&
135 task->task_status.stat == SAS_DEVICE_UNKNOWN)
138 SAS_DPRINTK("%s: task to dev %016llx response: 0x%x "
139 "status 0x%x\n", __func__,
140 SAS_ADDR(dev->sas_addr),
141 task->task_status.resp,
142 task->task_status.stat);
147 mutex_unlock(&dev->ex_dev.cmd_mutex);
149 BUG_ON(retry == 3 && task != NULL);
154 static int smp_execute_task(struct domain_device *dev, void *req, int req_size,
155 void *resp, int resp_size)
157 struct scatterlist req_sg;
158 struct scatterlist resp_sg;
160 sg_init_one(&req_sg, req, req_size);
161 sg_init_one(&resp_sg, resp, resp_size);
162 return smp_execute_task_sg(dev, &req_sg, &resp_sg);
165 /* ---------- Allocations ---------- */
167 static inline void *alloc_smp_req(int size)
169 u8 *p = kzalloc(size, GFP_KERNEL);
175 static inline void *alloc_smp_resp(int size)
177 return kzalloc(size, GFP_KERNEL);
180 static char sas_route_char(struct domain_device *dev, struct ex_phy *phy)
182 switch (phy->routing_attr) {
184 if (dev->ex_dev.t2t_supp)
190 case SUBTRACTIVE_ROUTING:
197 static enum sas_device_type to_dev_type(struct discover_resp *dr)
199 /* This is detecting a failure to transmit initial dev to host
200 * FIS as described in section J.5 of sas-2 r16
202 if (dr->attached_dev_type == SAS_PHY_UNUSED && dr->attached_sata_dev &&
203 dr->linkrate >= SAS_LINK_RATE_1_5_GBPS)
204 return SAS_SATA_PENDING;
206 return dr->attached_dev_type;
209 static void sas_set_ex_phy(struct domain_device *dev, int phy_id, void *rsp)
211 enum sas_device_type dev_type;
212 enum sas_linkrate linkrate;
213 u8 sas_addr[SAS_ADDR_SIZE];
214 struct smp_resp *resp = rsp;
215 struct discover_resp *dr = &resp->disc;
216 struct sas_ha_struct *ha = dev->port->ha;
217 struct expander_device *ex = &dev->ex_dev;
218 struct ex_phy *phy = &ex->ex_phy[phy_id];
219 struct sas_rphy *rphy = dev->rphy;
220 bool new_phy = !phy->phy;
224 if (WARN_ON_ONCE(test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state)))
226 phy->phy = sas_phy_alloc(&rphy->dev, phy_id);
228 /* FIXME: error_handling */
232 switch (resp->result) {
233 case SMP_RESP_PHY_VACANT:
234 phy->phy_state = PHY_VACANT;
237 phy->phy_state = PHY_NOT_PRESENT;
239 case SMP_RESP_FUNC_ACC:
240 phy->phy_state = PHY_EMPTY; /* do not know yet */
244 /* check if anything important changed to squelch debug */
245 dev_type = phy->attached_dev_type;
246 linkrate = phy->linkrate;
247 memcpy(sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
249 /* Handle vacant phy - rest of dr data is not valid so skip it */
250 if (phy->phy_state == PHY_VACANT) {
251 memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
252 phy->attached_dev_type = SAS_PHY_UNUSED;
253 if (!test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state)) {
254 phy->phy_id = phy_id;
260 phy->attached_dev_type = to_dev_type(dr);
261 if (test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state))
263 phy->phy_id = phy_id;
264 phy->linkrate = dr->linkrate;
265 phy->attached_sata_host = dr->attached_sata_host;
266 phy->attached_sata_dev = dr->attached_sata_dev;
267 phy->attached_sata_ps = dr->attached_sata_ps;
268 phy->attached_iproto = dr->iproto << 1;
269 phy->attached_tproto = dr->tproto << 1;
270 /* help some expanders that fail to zero sas_address in the 'no
273 if (phy->attached_dev_type == SAS_PHY_UNUSED ||
274 phy->linkrate < SAS_LINK_RATE_1_5_GBPS)
275 memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
277 memcpy(phy->attached_sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE);
278 phy->attached_phy_id = dr->attached_phy_id;
279 phy->phy_change_count = dr->change_count;
280 phy->routing_attr = dr->routing_attr;
281 phy->virtual = dr->virtual;
282 phy->last_da_index = -1;
284 phy->phy->identify.sas_address = SAS_ADDR(phy->attached_sas_addr);
285 phy->phy->identify.device_type = dr->attached_dev_type;
286 phy->phy->identify.initiator_port_protocols = phy->attached_iproto;
287 phy->phy->identify.target_port_protocols = phy->attached_tproto;
288 if (!phy->attached_tproto && dr->attached_sata_dev)
289 phy->phy->identify.target_port_protocols = SAS_PROTOCOL_SATA;
290 phy->phy->identify.phy_identifier = phy_id;
291 phy->phy->minimum_linkrate_hw = dr->hmin_linkrate;
292 phy->phy->maximum_linkrate_hw = dr->hmax_linkrate;
293 phy->phy->minimum_linkrate = dr->pmin_linkrate;
294 phy->phy->maximum_linkrate = dr->pmax_linkrate;
295 phy->phy->negotiated_linkrate = phy->linkrate;
299 if (sas_phy_add(phy->phy)) {
300 sas_phy_free(phy->phy);
305 switch (phy->attached_dev_type) {
306 case SAS_SATA_PENDING:
307 type = "stp pending";
313 if (phy->attached_iproto) {
314 if (phy->attached_tproto)
315 type = "host+target";
319 if (dr->attached_sata_dev)
325 case SAS_EDGE_EXPANDER_DEVICE:
326 case SAS_FANOUT_EXPANDER_DEVICE:
333 /* this routine is polled by libata error recovery so filter
334 * unimportant messages
336 if (new_phy || phy->attached_dev_type != dev_type ||
337 phy->linkrate != linkrate ||
338 SAS_ADDR(phy->attached_sas_addr) != SAS_ADDR(sas_addr))
343 /* if the attached device type changed and ata_eh is active,
344 * make sure we run revalidation when eh completes (see:
345 * sas_enable_revalidation)
347 if (test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state))
348 set_bit(DISCE_REVALIDATE_DOMAIN, &dev->port->disc.pending);
350 SAS_DPRINTK("%sex %016llx phy%02d:%c:%X attached: %016llx (%s)\n",
351 test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state) ? "ata: " : "",
352 SAS_ADDR(dev->sas_addr), phy->phy_id,
353 sas_route_char(dev, phy), phy->linkrate,
354 SAS_ADDR(phy->attached_sas_addr), type);
357 /* check if we have an existing attached ata device on this expander phy */
358 struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id)
360 struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy_id];
361 struct domain_device *dev;
362 struct sas_rphy *rphy;
367 rphy = ex_phy->port->rphy;
371 dev = sas_find_dev_by_rphy(rphy);
373 if (dev && dev_is_sata(dev))
379 #define DISCOVER_REQ_SIZE 16
380 #define DISCOVER_RESP_SIZE 56
382 static int sas_ex_phy_discover_helper(struct domain_device *dev, u8 *disc_req,
383 u8 *disc_resp, int single)
385 struct discover_resp *dr;
388 disc_req[9] = single;
390 res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE,
391 disc_resp, DISCOVER_RESP_SIZE);
394 dr = &((struct smp_resp *)disc_resp)->disc;
395 if (memcmp(dev->sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE) == 0) {
396 sas_printk("Found loopback topology, just ignore it!\n");
399 sas_set_ex_phy(dev, single, disc_resp);
403 int sas_ex_phy_discover(struct domain_device *dev, int single)
405 struct expander_device *ex = &dev->ex_dev;
410 disc_req = alloc_smp_req(DISCOVER_REQ_SIZE);
414 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
420 disc_req[1] = SMP_DISCOVER;
422 if (0 <= single && single < ex->num_phys) {
423 res = sas_ex_phy_discover_helper(dev, disc_req, disc_resp, single);
427 for (i = 0; i < ex->num_phys; i++) {
428 res = sas_ex_phy_discover_helper(dev, disc_req,
440 static int sas_expander_discover(struct domain_device *dev)
442 struct expander_device *ex = &dev->ex_dev;
445 ex->ex_phy = kzalloc(sizeof(*ex->ex_phy)*ex->num_phys, GFP_KERNEL);
449 res = sas_ex_phy_discover(dev, -1);
460 #define MAX_EXPANDER_PHYS 128
462 static void ex_assign_report_general(struct domain_device *dev,
463 struct smp_resp *resp)
465 struct report_general_resp *rg = &resp->rg;
467 dev->ex_dev.ex_change_count = be16_to_cpu(rg->change_count);
468 dev->ex_dev.max_route_indexes = be16_to_cpu(rg->route_indexes);
469 dev->ex_dev.num_phys = min(rg->num_phys, (u8)MAX_EXPANDER_PHYS);
470 dev->ex_dev.t2t_supp = rg->t2t_supp;
471 dev->ex_dev.conf_route_table = rg->conf_route_table;
472 dev->ex_dev.configuring = rg->configuring;
473 memcpy(dev->ex_dev.enclosure_logical_id, rg->enclosure_logical_id, 8);
476 #define RG_REQ_SIZE 8
477 #define RG_RESP_SIZE 32
479 static int sas_ex_general(struct domain_device *dev)
482 struct smp_resp *rg_resp;
486 rg_req = alloc_smp_req(RG_REQ_SIZE);
490 rg_resp = alloc_smp_resp(RG_RESP_SIZE);
496 rg_req[1] = SMP_REPORT_GENERAL;
498 for (i = 0; i < 5; i++) {
499 res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp,
503 SAS_DPRINTK("RG to ex %016llx failed:0x%x\n",
504 SAS_ADDR(dev->sas_addr), res);
506 } else if (rg_resp->result != SMP_RESP_FUNC_ACC) {
507 SAS_DPRINTK("RG:ex %016llx returned SMP result:0x%x\n",
508 SAS_ADDR(dev->sas_addr), rg_resp->result);
509 res = rg_resp->result;
513 ex_assign_report_general(dev, rg_resp);
515 if (dev->ex_dev.configuring) {
516 SAS_DPRINTK("RG: ex %llx self-configuring...\n",
517 SAS_ADDR(dev->sas_addr));
518 schedule_timeout_interruptible(5*HZ);
528 static void ex_assign_manuf_info(struct domain_device *dev, void
531 u8 *mi_resp = _mi_resp;
532 struct sas_rphy *rphy = dev->rphy;
533 struct sas_expander_device *edev = rphy_to_expander_device(rphy);
535 memcpy(edev->vendor_id, mi_resp + 12, SAS_EXPANDER_VENDOR_ID_LEN);
536 memcpy(edev->product_id, mi_resp + 20, SAS_EXPANDER_PRODUCT_ID_LEN);
537 memcpy(edev->product_rev, mi_resp + 36,
538 SAS_EXPANDER_PRODUCT_REV_LEN);
540 if (mi_resp[8] & 1) {
541 memcpy(edev->component_vendor_id, mi_resp + 40,
542 SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN);
543 edev->component_id = mi_resp[48] << 8 | mi_resp[49];
544 edev->component_revision_id = mi_resp[50];
548 #define MI_REQ_SIZE 8
549 #define MI_RESP_SIZE 64
551 static int sas_ex_manuf_info(struct domain_device *dev)
557 mi_req = alloc_smp_req(MI_REQ_SIZE);
561 mi_resp = alloc_smp_resp(MI_RESP_SIZE);
567 mi_req[1] = SMP_REPORT_MANUF_INFO;
569 res = smp_execute_task(dev, mi_req, MI_REQ_SIZE, mi_resp,MI_RESP_SIZE);
571 SAS_DPRINTK("MI: ex %016llx failed:0x%x\n",
572 SAS_ADDR(dev->sas_addr), res);
574 } else if (mi_resp[2] != SMP_RESP_FUNC_ACC) {
575 SAS_DPRINTK("MI ex %016llx returned SMP result:0x%x\n",
576 SAS_ADDR(dev->sas_addr), mi_resp[2]);
580 ex_assign_manuf_info(dev, mi_resp);
587 #define PC_REQ_SIZE 44
588 #define PC_RESP_SIZE 8
590 int sas_smp_phy_control(struct domain_device *dev, int phy_id,
591 enum phy_func phy_func,
592 struct sas_phy_linkrates *rates)
598 pc_req = alloc_smp_req(PC_REQ_SIZE);
602 pc_resp = alloc_smp_resp(PC_RESP_SIZE);
608 pc_req[1] = SMP_PHY_CONTROL;
610 pc_req[10]= phy_func;
612 pc_req[32] = rates->minimum_linkrate << 4;
613 pc_req[33] = rates->maximum_linkrate << 4;
616 res = smp_execute_task(dev, pc_req, PC_REQ_SIZE, pc_resp,PC_RESP_SIZE);
623 static void sas_ex_disable_phy(struct domain_device *dev, int phy_id)
625 struct expander_device *ex = &dev->ex_dev;
626 struct ex_phy *phy = &ex->ex_phy[phy_id];
628 sas_smp_phy_control(dev, phy_id, PHY_FUNC_DISABLE, NULL);
629 phy->linkrate = SAS_PHY_DISABLED;
632 static void sas_ex_disable_port(struct domain_device *dev, u8 *sas_addr)
634 struct expander_device *ex = &dev->ex_dev;
637 for (i = 0; i < ex->num_phys; i++) {
638 struct ex_phy *phy = &ex->ex_phy[i];
640 if (phy->phy_state == PHY_VACANT ||
641 phy->phy_state == PHY_NOT_PRESENT)
644 if (SAS_ADDR(phy->attached_sas_addr) == SAS_ADDR(sas_addr))
645 sas_ex_disable_phy(dev, i);
649 static int sas_dev_present_in_domain(struct asd_sas_port *port,
652 struct domain_device *dev;
654 if (SAS_ADDR(port->sas_addr) == SAS_ADDR(sas_addr))
656 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
657 if (SAS_ADDR(dev->sas_addr) == SAS_ADDR(sas_addr))
663 #define RPEL_REQ_SIZE 16
664 #define RPEL_RESP_SIZE 32
665 int sas_smp_get_phy_events(struct sas_phy *phy)
670 struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent);
671 struct domain_device *dev = sas_find_dev_by_rphy(rphy);
673 req = alloc_smp_req(RPEL_REQ_SIZE);
677 resp = alloc_smp_resp(RPEL_RESP_SIZE);
683 req[1] = SMP_REPORT_PHY_ERR_LOG;
684 req[9] = phy->number;
686 res = smp_execute_task(dev, req, RPEL_REQ_SIZE,
687 resp, RPEL_RESP_SIZE);
692 phy->invalid_dword_count = scsi_to_u32(&resp[12]);
693 phy->running_disparity_error_count = scsi_to_u32(&resp[16]);
694 phy->loss_of_dword_sync_count = scsi_to_u32(&resp[20]);
695 phy->phy_reset_problem_count = scsi_to_u32(&resp[24]);
703 #ifdef CONFIG_SCSI_SAS_ATA
705 #define RPS_REQ_SIZE 16
706 #define RPS_RESP_SIZE 60
708 int sas_get_report_phy_sata(struct domain_device *dev, int phy_id,
709 struct smp_resp *rps_resp)
712 u8 *rps_req = alloc_smp_req(RPS_REQ_SIZE);
713 u8 *resp = (u8 *)rps_resp;
718 rps_req[1] = SMP_REPORT_PHY_SATA;
721 res = smp_execute_task(dev, rps_req, RPS_REQ_SIZE,
722 rps_resp, RPS_RESP_SIZE);
724 /* 0x34 is the FIS type for the D2H fis. There's a potential
725 * standards cockup here. sas-2 explicitly specifies the FIS
726 * should be encoded so that FIS type is in resp[24].
727 * However, some expanders endian reverse this. Undo the
729 if (!res && resp[27] == 0x34 && resp[24] != 0x34) {
732 for (i = 0; i < 5; i++) {
737 resp[j + 0] = resp[j + 3];
738 resp[j + 1] = resp[j + 2];
749 static void sas_ex_get_linkrate(struct domain_device *parent,
750 struct domain_device *child,
751 struct ex_phy *parent_phy)
753 struct expander_device *parent_ex = &parent->ex_dev;
754 struct sas_port *port;
759 port = parent_phy->port;
761 for (i = 0; i < parent_ex->num_phys; i++) {
762 struct ex_phy *phy = &parent_ex->ex_phy[i];
764 if (phy->phy_state == PHY_VACANT ||
765 phy->phy_state == PHY_NOT_PRESENT)
768 if (SAS_ADDR(phy->attached_sas_addr) ==
769 SAS_ADDR(child->sas_addr)) {
771 child->min_linkrate = min(parent->min_linkrate,
773 child->max_linkrate = max(parent->max_linkrate,
776 sas_port_add_phy(port, phy->phy);
779 child->linkrate = min(parent_phy->linkrate, child->max_linkrate);
780 child->pathways = min(child->pathways, parent->pathways);
783 static struct domain_device *sas_ex_discover_end_dev(
784 struct domain_device *parent, int phy_id)
786 struct expander_device *parent_ex = &parent->ex_dev;
787 struct ex_phy *phy = &parent_ex->ex_phy[phy_id];
788 struct domain_device *child = NULL;
789 struct sas_rphy *rphy;
792 if (phy->attached_sata_host || phy->attached_sata_ps)
795 child = sas_alloc_device();
799 kref_get(&parent->kref);
800 child->parent = parent;
801 child->port = parent->port;
802 child->iproto = phy->attached_iproto;
803 memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
804 sas_hash_addr(child->hashed_sas_addr, child->sas_addr);
806 phy->port = sas_port_alloc(&parent->rphy->dev, phy_id);
807 if (unlikely(!phy->port))
809 if (unlikely(sas_port_add(phy->port) != 0)) {
810 sas_port_free(phy->port);
814 sas_ex_get_linkrate(parent, child, phy);
815 sas_device_set_phy(child, phy->port);
817 #ifdef CONFIG_SCSI_SAS_ATA
818 if ((phy->attached_tproto & SAS_PROTOCOL_STP) || phy->attached_sata_dev) {
819 res = sas_get_ata_info(child, phy);
824 res = sas_ata_init(child);
827 rphy = sas_end_device_alloc(phy->port);
832 get_device(&rphy->dev);
834 list_add_tail(&child->disco_list_node, &parent->port->disco_list);
836 res = sas_discover_sata(child);
838 SAS_DPRINTK("sas_discover_sata() for device %16llx at "
839 "%016llx:0x%x returned 0x%x\n",
840 SAS_ADDR(child->sas_addr),
841 SAS_ADDR(parent->sas_addr), phy_id, res);
846 if (phy->attached_tproto & SAS_PROTOCOL_SSP) {
847 child->dev_type = SAS_END_DEVICE;
848 rphy = sas_end_device_alloc(phy->port);
849 /* FIXME: error handling */
852 child->tproto = phy->attached_tproto;
856 get_device(&rphy->dev);
857 sas_fill_in_rphy(child, rphy);
859 list_add_tail(&child->disco_list_node, &parent->port->disco_list);
861 res = sas_discover_end_dev(child);
863 SAS_DPRINTK("sas_discover_end_dev() for device %16llx "
864 "at %016llx:0x%x returned 0x%x\n",
865 SAS_ADDR(child->sas_addr),
866 SAS_ADDR(parent->sas_addr), phy_id, res);
870 SAS_DPRINTK("target proto 0x%x at %016llx:0x%x not handled\n",
871 phy->attached_tproto, SAS_ADDR(parent->sas_addr),
876 list_add_tail(&child->siblings, &parent_ex->children);
880 sas_rphy_free(child->rphy);
881 list_del(&child->disco_list_node);
882 spin_lock_irq(&parent->port->dev_list_lock);
883 list_del(&child->dev_list_node);
884 spin_unlock_irq(&parent->port->dev_list_lock);
886 sas_port_delete(phy->port);
889 sas_put_device(child);
893 /* See if this phy is part of a wide port */
894 static bool sas_ex_join_wide_port(struct domain_device *parent, int phy_id)
896 struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id];
899 for (i = 0; i < parent->ex_dev.num_phys; i++) {
900 struct ex_phy *ephy = &parent->ex_dev.ex_phy[i];
905 if (!memcmp(phy->attached_sas_addr, ephy->attached_sas_addr,
906 SAS_ADDR_SIZE) && ephy->port) {
907 sas_port_add_phy(ephy->port, phy->phy);
908 phy->port = ephy->port;
909 phy->phy_state = PHY_DEVICE_DISCOVERED;
917 static struct domain_device *sas_ex_discover_expander(
918 struct domain_device *parent, int phy_id)
920 struct sas_expander_device *parent_ex = rphy_to_expander_device(parent->rphy);
921 struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id];
922 struct domain_device *child = NULL;
923 struct sas_rphy *rphy;
924 struct sas_expander_device *edev;
925 struct asd_sas_port *port;
928 if (phy->routing_attr == DIRECT_ROUTING) {
929 SAS_DPRINTK("ex %016llx:0x%x:D <--> ex %016llx:0x%x is not "
931 SAS_ADDR(parent->sas_addr), phy_id,
932 SAS_ADDR(phy->attached_sas_addr),
933 phy->attached_phy_id);
936 child = sas_alloc_device();
940 phy->port = sas_port_alloc(&parent->rphy->dev, phy_id);
941 /* FIXME: better error handling */
942 BUG_ON(sas_port_add(phy->port) != 0);
945 switch (phy->attached_dev_type) {
946 case SAS_EDGE_EXPANDER_DEVICE:
947 rphy = sas_expander_alloc(phy->port,
948 SAS_EDGE_EXPANDER_DEVICE);
950 case SAS_FANOUT_EXPANDER_DEVICE:
951 rphy = sas_expander_alloc(phy->port,
952 SAS_FANOUT_EXPANDER_DEVICE);
955 rphy = NULL; /* shut gcc up */
960 get_device(&rphy->dev);
961 edev = rphy_to_expander_device(rphy);
962 child->dev_type = phy->attached_dev_type;
963 kref_get(&parent->kref);
964 child->parent = parent;
966 child->iproto = phy->attached_iproto;
967 child->tproto = phy->attached_tproto;
968 memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
969 sas_hash_addr(child->hashed_sas_addr, child->sas_addr);
970 sas_ex_get_linkrate(parent, child, phy);
971 edev->level = parent_ex->level + 1;
972 parent->port->disc.max_level = max(parent->port->disc.max_level,
975 sas_fill_in_rphy(child, rphy);
978 spin_lock_irq(&parent->port->dev_list_lock);
979 list_add_tail(&child->dev_list_node, &parent->port->dev_list);
980 spin_unlock_irq(&parent->port->dev_list_lock);
982 res = sas_discover_expander(child);
984 sas_rphy_delete(rphy);
985 spin_lock_irq(&parent->port->dev_list_lock);
986 list_del(&child->dev_list_node);
987 spin_unlock_irq(&parent->port->dev_list_lock);
988 sas_put_device(child);
991 list_add_tail(&child->siblings, &parent->ex_dev.children);
995 static int sas_ex_discover_dev(struct domain_device *dev, int phy_id)
997 struct expander_device *ex = &dev->ex_dev;
998 struct ex_phy *ex_phy = &ex->ex_phy[phy_id];
999 struct domain_device *child = NULL;
1003 if (ex_phy->linkrate == SAS_SATA_SPINUP_HOLD) {
1004 if (!sas_smp_phy_control(dev, phy_id, PHY_FUNC_LINK_RESET, NULL))
1005 res = sas_ex_phy_discover(dev, phy_id);
1010 /* Parent and domain coherency */
1011 if (!dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) ==
1012 SAS_ADDR(dev->port->sas_addr))) {
1013 sas_add_parent_port(dev, phy_id);
1016 if (dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) ==
1017 SAS_ADDR(dev->parent->sas_addr))) {
1018 sas_add_parent_port(dev, phy_id);
1019 if (ex_phy->routing_attr == TABLE_ROUTING)
1020 sas_configure_phy(dev, phy_id, dev->port->sas_addr, 1);
1024 if (sas_dev_present_in_domain(dev->port, ex_phy->attached_sas_addr))
1025 sas_ex_disable_port(dev, ex_phy->attached_sas_addr);
1027 if (ex_phy->attached_dev_type == SAS_PHY_UNUSED) {
1028 if (ex_phy->routing_attr == DIRECT_ROUTING) {
1029 memset(ex_phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
1030 sas_configure_routing(dev, ex_phy->attached_sas_addr);
1033 } else if (ex_phy->linkrate == SAS_LINK_RATE_UNKNOWN)
1036 if (ex_phy->attached_dev_type != SAS_END_DEVICE &&
1037 ex_phy->attached_dev_type != SAS_FANOUT_EXPANDER_DEVICE &&
1038 ex_phy->attached_dev_type != SAS_EDGE_EXPANDER_DEVICE &&
1039 ex_phy->attached_dev_type != SAS_SATA_PENDING) {
1040 SAS_DPRINTK("unknown device type(0x%x) attached to ex %016llx "
1041 "phy 0x%x\n", ex_phy->attached_dev_type,
1042 SAS_ADDR(dev->sas_addr),
1047 res = sas_configure_routing(dev, ex_phy->attached_sas_addr);
1049 SAS_DPRINTK("configure routing for dev %016llx "
1050 "reported 0x%x. Forgotten\n",
1051 SAS_ADDR(ex_phy->attached_sas_addr), res);
1052 sas_disable_routing(dev, ex_phy->attached_sas_addr);
1056 if (sas_ex_join_wide_port(dev, phy_id)) {
1057 SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n",
1058 phy_id, SAS_ADDR(ex_phy->attached_sas_addr));
1062 switch (ex_phy->attached_dev_type) {
1063 case SAS_END_DEVICE:
1064 case SAS_SATA_PENDING:
1065 child = sas_ex_discover_end_dev(dev, phy_id);
1067 case SAS_FANOUT_EXPANDER_DEVICE:
1068 if (SAS_ADDR(dev->port->disc.fanout_sas_addr)) {
1069 SAS_DPRINTK("second fanout expander %016llx phy 0x%x "
1070 "attached to ex %016llx phy 0x%x\n",
1071 SAS_ADDR(ex_phy->attached_sas_addr),
1072 ex_phy->attached_phy_id,
1073 SAS_ADDR(dev->sas_addr),
1075 sas_ex_disable_phy(dev, phy_id);
1078 memcpy(dev->port->disc.fanout_sas_addr,
1079 ex_phy->attached_sas_addr, SAS_ADDR_SIZE);
1081 case SAS_EDGE_EXPANDER_DEVICE:
1082 child = sas_ex_discover_expander(dev, phy_id);
1091 for (i = 0; i < ex->num_phys; i++) {
1092 if (ex->ex_phy[i].phy_state == PHY_VACANT ||
1093 ex->ex_phy[i].phy_state == PHY_NOT_PRESENT)
1096 * Due to races, the phy might not get added to the
1097 * wide port, so we add the phy to the wide port here.
1099 if (SAS_ADDR(ex->ex_phy[i].attached_sas_addr) ==
1100 SAS_ADDR(child->sas_addr)) {
1101 ex->ex_phy[i].phy_state= PHY_DEVICE_DISCOVERED;
1102 if (sas_ex_join_wide_port(dev, i))
1103 SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n",
1104 i, SAS_ADDR(ex->ex_phy[i].attached_sas_addr));
1113 static int sas_find_sub_addr(struct domain_device *dev, u8 *sub_addr)
1115 struct expander_device *ex = &dev->ex_dev;
1118 for (i = 0; i < ex->num_phys; i++) {
1119 struct ex_phy *phy = &ex->ex_phy[i];
1121 if (phy->phy_state == PHY_VACANT ||
1122 phy->phy_state == PHY_NOT_PRESENT)
1125 if ((phy->attached_dev_type == SAS_EDGE_EXPANDER_DEVICE ||
1126 phy->attached_dev_type == SAS_FANOUT_EXPANDER_DEVICE) &&
1127 phy->routing_attr == SUBTRACTIVE_ROUTING) {
1129 memcpy(sub_addr, phy->attached_sas_addr,SAS_ADDR_SIZE);
1137 static int sas_check_level_subtractive_boundary(struct domain_device *dev)
1139 struct expander_device *ex = &dev->ex_dev;
1140 struct domain_device *child;
1141 u8 sub_addr[8] = {0, };
1143 list_for_each_entry(child, &ex->children, siblings) {
1144 if (child->dev_type != SAS_EDGE_EXPANDER_DEVICE &&
1145 child->dev_type != SAS_FANOUT_EXPANDER_DEVICE)
1147 if (sub_addr[0] == 0) {
1148 sas_find_sub_addr(child, sub_addr);
1153 if (sas_find_sub_addr(child, s2) &&
1154 (SAS_ADDR(sub_addr) != SAS_ADDR(s2))) {
1156 SAS_DPRINTK("ex %016llx->%016llx-?->%016llx "
1157 "diverges from subtractive "
1158 "boundary %016llx\n",
1159 SAS_ADDR(dev->sas_addr),
1160 SAS_ADDR(child->sas_addr),
1162 SAS_ADDR(sub_addr));
1164 sas_ex_disable_port(child, s2);
1171 * sas_ex_discover_devices -- discover devices attached to this expander
1172 * dev: pointer to the expander domain device
1173 * single: if you want to do a single phy, else set to -1;
1175 * Configure this expander for use with its devices and register the
1176 * devices of this expander.
1178 static int sas_ex_discover_devices(struct domain_device *dev, int single)
1180 struct expander_device *ex = &dev->ex_dev;
1181 int i = 0, end = ex->num_phys;
1184 if (0 <= single && single < end) {
1189 for ( ; i < end; i++) {
1190 struct ex_phy *ex_phy = &ex->ex_phy[i];
1192 if (ex_phy->phy_state == PHY_VACANT ||
1193 ex_phy->phy_state == PHY_NOT_PRESENT ||
1194 ex_phy->phy_state == PHY_DEVICE_DISCOVERED)
1197 switch (ex_phy->linkrate) {
1198 case SAS_PHY_DISABLED:
1199 case SAS_PHY_RESET_PROBLEM:
1200 case SAS_SATA_PORT_SELECTOR:
1203 res = sas_ex_discover_dev(dev, i);
1211 sas_check_level_subtractive_boundary(dev);
1216 static int sas_check_ex_subtractive_boundary(struct domain_device *dev)
1218 struct expander_device *ex = &dev->ex_dev;
1220 u8 *sub_sas_addr = NULL;
1222 if (dev->dev_type != SAS_EDGE_EXPANDER_DEVICE)
1225 for (i = 0; i < ex->num_phys; i++) {
1226 struct ex_phy *phy = &ex->ex_phy[i];
1228 if (phy->phy_state == PHY_VACANT ||
1229 phy->phy_state == PHY_NOT_PRESENT)
1232 if ((phy->attached_dev_type == SAS_FANOUT_EXPANDER_DEVICE ||
1233 phy->attached_dev_type == SAS_EDGE_EXPANDER_DEVICE) &&
1234 phy->routing_attr == SUBTRACTIVE_ROUTING) {
1237 sub_sas_addr = &phy->attached_sas_addr[0];
1238 else if (SAS_ADDR(sub_sas_addr) !=
1239 SAS_ADDR(phy->attached_sas_addr)) {
1241 SAS_DPRINTK("ex %016llx phy 0x%x "
1242 "diverges(%016llx) on subtractive "
1243 "boundary(%016llx). Disabled\n",
1244 SAS_ADDR(dev->sas_addr), i,
1245 SAS_ADDR(phy->attached_sas_addr),
1246 SAS_ADDR(sub_sas_addr));
1247 sas_ex_disable_phy(dev, i);
1254 static void sas_print_parent_topology_bug(struct domain_device *child,
1255 struct ex_phy *parent_phy,
1256 struct ex_phy *child_phy)
1258 static const char *ex_type[] = {
1259 [SAS_EDGE_EXPANDER_DEVICE] = "edge",
1260 [SAS_FANOUT_EXPANDER_DEVICE] = "fanout",
1262 struct domain_device *parent = child->parent;
1264 sas_printk("%s ex %016llx phy 0x%x <--> %s ex %016llx "
1265 "phy 0x%x has %c:%c routing link!\n",
1267 ex_type[parent->dev_type],
1268 SAS_ADDR(parent->sas_addr),
1271 ex_type[child->dev_type],
1272 SAS_ADDR(child->sas_addr),
1275 sas_route_char(parent, parent_phy),
1276 sas_route_char(child, child_phy));
1279 static int sas_check_eeds(struct domain_device *child,
1280 struct ex_phy *parent_phy,
1281 struct ex_phy *child_phy)
1284 struct domain_device *parent = child->parent;
1286 if (SAS_ADDR(parent->port->disc.fanout_sas_addr) != 0) {
1288 SAS_DPRINTK("edge ex %016llx phy S:0x%x <--> edge ex %016llx "
1289 "phy S:0x%x, while there is a fanout ex %016llx\n",
1290 SAS_ADDR(parent->sas_addr),
1292 SAS_ADDR(child->sas_addr),
1294 SAS_ADDR(parent->port->disc.fanout_sas_addr));
1295 } else if (SAS_ADDR(parent->port->disc.eeds_a) == 0) {
1296 memcpy(parent->port->disc.eeds_a, parent->sas_addr,
1298 memcpy(parent->port->disc.eeds_b, child->sas_addr,
1300 } else if (((SAS_ADDR(parent->port->disc.eeds_a) ==
1301 SAS_ADDR(parent->sas_addr)) ||
1302 (SAS_ADDR(parent->port->disc.eeds_a) ==
1303 SAS_ADDR(child->sas_addr)))
1305 ((SAS_ADDR(parent->port->disc.eeds_b) ==
1306 SAS_ADDR(parent->sas_addr)) ||
1307 (SAS_ADDR(parent->port->disc.eeds_b) ==
1308 SAS_ADDR(child->sas_addr))))
1312 SAS_DPRINTK("edge ex %016llx phy 0x%x <--> edge ex %016llx "
1313 "phy 0x%x link forms a third EEDS!\n",
1314 SAS_ADDR(parent->sas_addr),
1316 SAS_ADDR(child->sas_addr),
1323 /* Here we spill over 80 columns. It is intentional.
1325 static int sas_check_parent_topology(struct domain_device *child)
1327 struct expander_device *child_ex = &child->ex_dev;
1328 struct expander_device *parent_ex;
1335 if (child->parent->dev_type != SAS_EDGE_EXPANDER_DEVICE &&
1336 child->parent->dev_type != SAS_FANOUT_EXPANDER_DEVICE)
1339 parent_ex = &child->parent->ex_dev;
1341 for (i = 0; i < parent_ex->num_phys; i++) {
1342 struct ex_phy *parent_phy = &parent_ex->ex_phy[i];
1343 struct ex_phy *child_phy;
1345 if (parent_phy->phy_state == PHY_VACANT ||
1346 parent_phy->phy_state == PHY_NOT_PRESENT)
1349 if (SAS_ADDR(parent_phy->attached_sas_addr) != SAS_ADDR(child->sas_addr))
1352 child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id];
1354 switch (child->parent->dev_type) {
1355 case SAS_EDGE_EXPANDER_DEVICE:
1356 if (child->dev_type == SAS_FANOUT_EXPANDER_DEVICE) {
1357 if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING ||
1358 child_phy->routing_attr != TABLE_ROUTING) {
1359 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1362 } else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) {
1363 if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) {
1364 res = sas_check_eeds(child, parent_phy, child_phy);
1365 } else if (child_phy->routing_attr != TABLE_ROUTING) {
1366 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1369 } else if (parent_phy->routing_attr == TABLE_ROUTING) {
1370 if (child_phy->routing_attr == SUBTRACTIVE_ROUTING ||
1371 (child_phy->routing_attr == TABLE_ROUTING &&
1372 child_ex->t2t_supp && parent_ex->t2t_supp)) {
1375 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1380 case SAS_FANOUT_EXPANDER_DEVICE:
1381 if (parent_phy->routing_attr != TABLE_ROUTING ||
1382 child_phy->routing_attr != SUBTRACTIVE_ROUTING) {
1383 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1395 #define RRI_REQ_SIZE 16
1396 #define RRI_RESP_SIZE 44
1398 static int sas_configure_present(struct domain_device *dev, int phy_id,
1399 u8 *sas_addr, int *index, int *present)
1402 struct expander_device *ex = &dev->ex_dev;
1403 struct ex_phy *phy = &ex->ex_phy[phy_id];
1410 rri_req = alloc_smp_req(RRI_REQ_SIZE);
1414 rri_resp = alloc_smp_resp(RRI_RESP_SIZE);
1420 rri_req[1] = SMP_REPORT_ROUTE_INFO;
1421 rri_req[9] = phy_id;
1423 for (i = 0; i < ex->max_route_indexes ; i++) {
1424 *(__be16 *)(rri_req+6) = cpu_to_be16(i);
1425 res = smp_execute_task(dev, rri_req, RRI_REQ_SIZE, rri_resp,
1430 if (res == SMP_RESP_NO_INDEX) {
1431 SAS_DPRINTK("overflow of indexes: dev %016llx "
1432 "phy 0x%x index 0x%x\n",
1433 SAS_ADDR(dev->sas_addr), phy_id, i);
1435 } else if (res != SMP_RESP_FUNC_ACC) {
1436 SAS_DPRINTK("%s: dev %016llx phy 0x%x index 0x%x "
1437 "result 0x%x\n", __func__,
1438 SAS_ADDR(dev->sas_addr), phy_id, i, res);
1441 if (SAS_ADDR(sas_addr) != 0) {
1442 if (SAS_ADDR(rri_resp+16) == SAS_ADDR(sas_addr)) {
1444 if ((rri_resp[12] & 0x80) == 0x80)
1449 } else if (SAS_ADDR(rri_resp+16) == 0) {
1454 } else if (SAS_ADDR(rri_resp+16) == 0 &&
1455 phy->last_da_index < i) {
1456 phy->last_da_index = i;
1469 #define CRI_REQ_SIZE 44
1470 #define CRI_RESP_SIZE 8
1472 static int sas_configure_set(struct domain_device *dev, int phy_id,
1473 u8 *sas_addr, int index, int include)
1479 cri_req = alloc_smp_req(CRI_REQ_SIZE);
1483 cri_resp = alloc_smp_resp(CRI_RESP_SIZE);
1489 cri_req[1] = SMP_CONF_ROUTE_INFO;
1490 *(__be16 *)(cri_req+6) = cpu_to_be16(index);
1491 cri_req[9] = phy_id;
1492 if (SAS_ADDR(sas_addr) == 0 || !include)
1493 cri_req[12] |= 0x80;
1494 memcpy(cri_req+16, sas_addr, SAS_ADDR_SIZE);
1496 res = smp_execute_task(dev, cri_req, CRI_REQ_SIZE, cri_resp,
1501 if (res == SMP_RESP_NO_INDEX) {
1502 SAS_DPRINTK("overflow of indexes: dev %016llx phy 0x%x "
1504 SAS_ADDR(dev->sas_addr), phy_id, index);
1512 static int sas_configure_phy(struct domain_device *dev, int phy_id,
1513 u8 *sas_addr, int include)
1519 res = sas_configure_present(dev, phy_id, sas_addr, &index, &present);
1522 if (include ^ present)
1523 return sas_configure_set(dev, phy_id, sas_addr, index,include);
1529 * sas_configure_parent -- configure routing table of parent
1530 * parent: parent expander
1531 * child: child expander
1532 * sas_addr: SAS port identifier of device directly attached to child
1534 static int sas_configure_parent(struct domain_device *parent,
1535 struct domain_device *child,
1536 u8 *sas_addr, int include)
1538 struct expander_device *ex_parent = &parent->ex_dev;
1542 if (parent->parent) {
1543 res = sas_configure_parent(parent->parent, parent, sas_addr,
1549 if (ex_parent->conf_route_table == 0) {
1550 SAS_DPRINTK("ex %016llx has self-configuring routing table\n",
1551 SAS_ADDR(parent->sas_addr));
1555 for (i = 0; i < ex_parent->num_phys; i++) {
1556 struct ex_phy *phy = &ex_parent->ex_phy[i];
1558 if ((phy->routing_attr == TABLE_ROUTING) &&
1559 (SAS_ADDR(phy->attached_sas_addr) ==
1560 SAS_ADDR(child->sas_addr))) {
1561 res = sas_configure_phy(parent, i, sas_addr, include);
1571 * sas_configure_routing -- configure routing
1572 * dev: expander device
1573 * sas_addr: port identifier of device directly attached to the expander device
1575 static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr)
1578 return sas_configure_parent(dev->parent, dev, sas_addr, 1);
1582 static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr)
1585 return sas_configure_parent(dev->parent, dev, sas_addr, 0);
1590 * sas_discover_expander -- expander discovery
1591 * @ex: pointer to expander domain device
1593 * See comment in sas_discover_sata().
1595 static int sas_discover_expander(struct domain_device *dev)
1599 res = sas_notify_lldd_dev_found(dev);
1603 res = sas_ex_general(dev);
1606 res = sas_ex_manuf_info(dev);
1610 res = sas_expander_discover(dev);
1612 SAS_DPRINTK("expander %016llx discovery failed(0x%x)\n",
1613 SAS_ADDR(dev->sas_addr), res);
1617 sas_check_ex_subtractive_boundary(dev);
1618 res = sas_check_parent_topology(dev);
1623 sas_notify_lldd_dev_gone(dev);
1627 static int sas_ex_level_discovery(struct asd_sas_port *port, const int level)
1630 struct domain_device *dev;
1632 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
1633 if (dev->dev_type == SAS_EDGE_EXPANDER_DEVICE ||
1634 dev->dev_type == SAS_FANOUT_EXPANDER_DEVICE) {
1635 struct sas_expander_device *ex =
1636 rphy_to_expander_device(dev->rphy);
1638 if (level == ex->level)
1639 res = sas_ex_discover_devices(dev, -1);
1641 res = sas_ex_discover_devices(port->port_dev, -1);
1649 static int sas_ex_bfs_disc(struct asd_sas_port *port)
1655 level = port->disc.max_level;
1656 res = sas_ex_level_discovery(port, level);
1658 } while (level < port->disc.max_level);
1663 int sas_discover_root_expander(struct domain_device *dev)
1666 struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy);
1668 res = sas_rphy_add(dev->rphy);
1672 ex->level = dev->port->disc.max_level; /* 0 */
1673 res = sas_discover_expander(dev);
1677 sas_ex_bfs_disc(dev->port);
1682 sas_rphy_remove(dev->rphy);
1687 /* ---------- Domain revalidation ---------- */
1689 static int sas_get_phy_discover(struct domain_device *dev,
1690 int phy_id, struct smp_resp *disc_resp)
1695 disc_req = alloc_smp_req(DISCOVER_REQ_SIZE);
1699 disc_req[1] = SMP_DISCOVER;
1700 disc_req[9] = phy_id;
1702 res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE,
1703 disc_resp, DISCOVER_RESP_SIZE);
1706 else if (disc_resp->result != SMP_RESP_FUNC_ACC) {
1707 res = disc_resp->result;
1715 static int sas_get_phy_change_count(struct domain_device *dev,
1716 int phy_id, int *pcc)
1719 struct smp_resp *disc_resp;
1721 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
1725 res = sas_get_phy_discover(dev, phy_id, disc_resp);
1727 *pcc = disc_resp->disc.change_count;
1733 static int sas_get_phy_attached_dev(struct domain_device *dev, int phy_id,
1734 u8 *sas_addr, enum sas_device_type *type)
1737 struct smp_resp *disc_resp;
1738 struct discover_resp *dr;
1740 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
1743 dr = &disc_resp->disc;
1745 res = sas_get_phy_discover(dev, phy_id, disc_resp);
1747 memcpy(sas_addr, disc_resp->disc.attached_sas_addr, 8);
1748 *type = to_dev_type(dr);
1750 memset(sas_addr, 0, 8);
1756 static int sas_find_bcast_phy(struct domain_device *dev, int *phy_id,
1757 int from_phy, bool update)
1759 struct expander_device *ex = &dev->ex_dev;
1763 for (i = from_phy; i < ex->num_phys; i++) {
1764 int phy_change_count = 0;
1766 res = sas_get_phy_change_count(dev, i, &phy_change_count);
1768 case SMP_RESP_PHY_VACANT:
1769 case SMP_RESP_NO_PHY:
1771 case SMP_RESP_FUNC_ACC:
1777 if (phy_change_count != ex->ex_phy[i].phy_change_count) {
1779 ex->ex_phy[i].phy_change_count =
1788 static int sas_get_ex_change_count(struct domain_device *dev, int *ecc)
1792 struct smp_resp *rg_resp;
1794 rg_req = alloc_smp_req(RG_REQ_SIZE);
1798 rg_resp = alloc_smp_resp(RG_RESP_SIZE);
1804 rg_req[1] = SMP_REPORT_GENERAL;
1806 res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp,
1810 if (rg_resp->result != SMP_RESP_FUNC_ACC) {
1811 res = rg_resp->result;
1815 *ecc = be16_to_cpu(rg_resp->rg.change_count);
1822 * sas_find_bcast_dev - find the device issue BROADCAST(CHANGE).
1823 * @dev:domain device to be detect.
1824 * @src_dev: the device which originated BROADCAST(CHANGE).
1826 * Add self-configuration expander support. Suppose two expander cascading,
1827 * when the first level expander is self-configuring, hotplug the disks in
1828 * second level expander, BROADCAST(CHANGE) will not only be originated
1829 * in the second level expander, but also be originated in the first level
1830 * expander (see SAS protocol SAS 2r-14, 7.11 for detail), it is to say,
1831 * expander changed count in two level expanders will all increment at least
1832 * once, but the phy which chang count has changed is the source device which
1836 static int sas_find_bcast_dev(struct domain_device *dev,
1837 struct domain_device **src_dev)
1839 struct expander_device *ex = &dev->ex_dev;
1840 int ex_change_count = -1;
1843 struct domain_device *ch;
1845 res = sas_get_ex_change_count(dev, &ex_change_count);
1848 if (ex_change_count != -1 && ex_change_count != ex->ex_change_count) {
1849 /* Just detect if this expander phys phy change count changed,
1850 * in order to determine if this expander originate BROADCAST,
1851 * and do not update phy change count field in our structure.
1853 res = sas_find_bcast_phy(dev, &phy_id, 0, false);
1856 ex->ex_change_count = ex_change_count;
1857 SAS_DPRINTK("Expander phy change count has changed\n");
1860 SAS_DPRINTK("Expander phys DID NOT change\n");
1862 list_for_each_entry(ch, &ex->children, siblings) {
1863 if (ch->dev_type == SAS_EDGE_EXPANDER_DEVICE || ch->dev_type == SAS_FANOUT_EXPANDER_DEVICE) {
1864 res = sas_find_bcast_dev(ch, src_dev);
1873 static void sas_unregister_ex_tree(struct asd_sas_port *port, struct domain_device *dev)
1875 struct expander_device *ex = &dev->ex_dev;
1876 struct domain_device *child, *n;
1878 list_for_each_entry_safe(child, n, &ex->children, siblings) {
1879 set_bit(SAS_DEV_GONE, &child->state);
1880 if (child->dev_type == SAS_EDGE_EXPANDER_DEVICE ||
1881 child->dev_type == SAS_FANOUT_EXPANDER_DEVICE)
1882 sas_unregister_ex_tree(port, child);
1884 sas_unregister_dev(port, child);
1886 sas_unregister_dev(port, dev);
1889 static void sas_unregister_devs_sas_addr(struct domain_device *parent,
1890 int phy_id, bool last)
1892 struct expander_device *ex_dev = &parent->ex_dev;
1893 struct ex_phy *phy = &ex_dev->ex_phy[phy_id];
1894 struct domain_device *child, *n, *found = NULL;
1896 list_for_each_entry_safe(child, n,
1897 &ex_dev->children, siblings) {
1898 if (SAS_ADDR(child->sas_addr) ==
1899 SAS_ADDR(phy->attached_sas_addr)) {
1900 set_bit(SAS_DEV_GONE, &child->state);
1901 if (child->dev_type == SAS_EDGE_EXPANDER_DEVICE ||
1902 child->dev_type == SAS_FANOUT_EXPANDER_DEVICE)
1903 sas_unregister_ex_tree(parent->port, child);
1905 sas_unregister_dev(parent->port, child);
1910 sas_disable_routing(parent, phy->attached_sas_addr);
1912 memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
1914 sas_port_delete_phy(phy->port, phy->phy);
1915 sas_device_set_phy(found, phy->port);
1916 if (phy->port->num_phys == 0)
1917 sas_port_delete(phy->port);
1922 static int sas_discover_bfs_by_root_level(struct domain_device *root,
1925 struct expander_device *ex_root = &root->ex_dev;
1926 struct domain_device *child;
1929 list_for_each_entry(child, &ex_root->children, siblings) {
1930 if (child->dev_type == SAS_EDGE_EXPANDER_DEVICE ||
1931 child->dev_type == SAS_FANOUT_EXPANDER_DEVICE) {
1932 struct sas_expander_device *ex =
1933 rphy_to_expander_device(child->rphy);
1935 if (level > ex->level)
1936 res = sas_discover_bfs_by_root_level(child,
1938 else if (level == ex->level)
1939 res = sas_ex_discover_devices(child, -1);
1945 static int sas_discover_bfs_by_root(struct domain_device *dev)
1948 struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy);
1949 int level = ex->level+1;
1951 res = sas_ex_discover_devices(dev, -1);
1955 res = sas_discover_bfs_by_root_level(dev, level);
1958 } while (level <= dev->port->disc.max_level);
1963 static int sas_discover_new(struct domain_device *dev, int phy_id)
1965 struct ex_phy *ex_phy = &dev->ex_dev.ex_phy[phy_id];
1966 struct domain_device *child;
1969 SAS_DPRINTK("ex %016llx phy%d new device attached\n",
1970 SAS_ADDR(dev->sas_addr), phy_id);
1971 res = sas_ex_phy_discover(dev, phy_id);
1975 if (sas_ex_join_wide_port(dev, phy_id))
1978 res = sas_ex_discover_devices(dev, phy_id);
1981 list_for_each_entry(child, &dev->ex_dev.children, siblings) {
1982 if (SAS_ADDR(child->sas_addr) ==
1983 SAS_ADDR(ex_phy->attached_sas_addr)) {
1984 if (child->dev_type == SAS_EDGE_EXPANDER_DEVICE ||
1985 child->dev_type == SAS_FANOUT_EXPANDER_DEVICE)
1986 res = sas_discover_bfs_by_root(child);
1993 static bool dev_type_flutter(enum sas_device_type new, enum sas_device_type old)
1998 /* treat device directed resets as flutter, if we went
1999 * SAS_END_DEVICE to SAS_SATA_PENDING the link needs recovery
2001 if ((old == SAS_SATA_PENDING && new == SAS_END_DEVICE) ||
2002 (old == SAS_END_DEVICE && new == SAS_SATA_PENDING))
2008 static int sas_rediscover_dev(struct domain_device *dev, int phy_id, bool last)
2010 struct expander_device *ex = &dev->ex_dev;
2011 struct ex_phy *phy = &ex->ex_phy[phy_id];
2012 enum sas_device_type type = SAS_PHY_UNUSED;
2016 memset(sas_addr, 0, 8);
2017 res = sas_get_phy_attached_dev(dev, phy_id, sas_addr, &type);
2019 case SMP_RESP_NO_PHY:
2020 phy->phy_state = PHY_NOT_PRESENT;
2021 sas_unregister_devs_sas_addr(dev, phy_id, last);
2023 case SMP_RESP_PHY_VACANT:
2024 phy->phy_state = PHY_VACANT;
2025 sas_unregister_devs_sas_addr(dev, phy_id, last);
2027 case SMP_RESP_FUNC_ACC:
2035 if ((SAS_ADDR(sas_addr) == 0) || (res == -ECOMM)) {
2036 phy->phy_state = PHY_EMPTY;
2037 sas_unregister_devs_sas_addr(dev, phy_id, last);
2039 } else if (SAS_ADDR(sas_addr) == SAS_ADDR(phy->attached_sas_addr) &&
2040 dev_type_flutter(type, phy->attached_dev_type)) {
2041 struct domain_device *ata_dev = sas_ex_to_ata(dev, phy_id);
2044 sas_ex_phy_discover(dev, phy_id);
2046 if (ata_dev && phy->attached_dev_type == SAS_SATA_PENDING)
2047 action = ", needs recovery";
2048 SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter%s\n",
2049 SAS_ADDR(dev->sas_addr), phy_id, action);
2053 /* delete the old link */
2054 if (SAS_ADDR(phy->attached_sas_addr) &&
2055 SAS_ADDR(sas_addr) != SAS_ADDR(phy->attached_sas_addr)) {
2056 SAS_DPRINTK("ex %016llx phy 0x%x replace %016llx\n",
2057 SAS_ADDR(dev->sas_addr), phy_id,
2058 SAS_ADDR(phy->attached_sas_addr));
2059 sas_unregister_devs_sas_addr(dev, phy_id, last);
2062 return sas_discover_new(dev, phy_id);
2066 * sas_rediscover - revalidate the domain.
2067 * @dev:domain device to be detect.
2068 * @phy_id: the phy id will be detected.
2070 * NOTE: this process _must_ quit (return) as soon as any connection
2071 * errors are encountered. Connection recovery is done elsewhere.
2072 * Discover process only interrogates devices in order to discover the
2073 * domain.For plugging out, we un-register the device only when it is
2074 * the last phy in the port, for other phys in this port, we just delete it
2075 * from the port.For inserting, we do discovery when it is the
2076 * first phy,for other phys in this port, we add it to the port to
2077 * forming the wide-port.
2079 static int sas_rediscover(struct domain_device *dev, const int phy_id)
2081 struct expander_device *ex = &dev->ex_dev;
2082 struct ex_phy *changed_phy = &ex->ex_phy[phy_id];
2085 bool last = true; /* is this the last phy of the port */
2087 SAS_DPRINTK("ex %016llx phy%d originated BROADCAST(CHANGE)\n",
2088 SAS_ADDR(dev->sas_addr), phy_id);
2090 if (SAS_ADDR(changed_phy->attached_sas_addr) != 0) {
2091 for (i = 0; i < ex->num_phys; i++) {
2092 struct ex_phy *phy = &ex->ex_phy[i];
2096 if (SAS_ADDR(phy->attached_sas_addr) ==
2097 SAS_ADDR(changed_phy->attached_sas_addr)) {
2098 SAS_DPRINTK("phy%d part of wide port with "
2099 "phy%d\n", phy_id, i);
2104 res = sas_rediscover_dev(dev, phy_id, last);
2106 res = sas_discover_new(dev, phy_id);
2111 * sas_revalidate_domain -- revalidate the domain
2112 * @port: port to the domain of interest
2114 * NOTE: this process _must_ quit (return) as soon as any connection
2115 * errors are encountered. Connection recovery is done elsewhere.
2116 * Discover process only interrogates devices in order to discover the
2119 int sas_ex_revalidate_domain(struct domain_device *port_dev)
2122 struct domain_device *dev = NULL;
2124 res = sas_find_bcast_dev(port_dev, &dev);
2125 while (res == 0 && dev) {
2126 struct expander_device *ex = &dev->ex_dev;
2131 res = sas_find_bcast_phy(dev, &phy_id, i, true);
2134 res = sas_rediscover(dev, phy_id);
2136 } while (i < ex->num_phys);
2139 res = sas_find_bcast_dev(port_dev, &dev);
2144 void sas_smp_handler(struct bsg_job *job, struct Scsi_Host *shost,
2145 struct sas_rphy *rphy)
2147 struct domain_device *dev;
2148 unsigned int reslen = 0;
2151 /* no rphy means no smp target support (ie aic94xx host) */
2153 return sas_smp_host_handler(job, shost);
2155 switch (rphy->identify.device_type) {
2156 case SAS_EDGE_EXPANDER_DEVICE:
2157 case SAS_FANOUT_EXPANDER_DEVICE:
2160 printk("%s: can we send a smp request to a device?\n",
2165 dev = sas_find_dev_by_rphy(rphy);
2167 printk("%s: fail to find a domain_device?\n", __func__);
2171 /* do we need to support multiple segments? */
2172 if (job->request_payload.sg_cnt > 1 ||
2173 job->reply_payload.sg_cnt > 1) {
2174 printk("%s: multiple segments req %u, rsp %u\n",
2175 __func__, job->request_payload.payload_len,
2176 job->reply_payload.payload_len);
2180 ret = smp_execute_task_sg(dev, job->request_payload.sg_list,
2181 job->reply_payload.sg_list);
2183 /* positive number is the untransferred residual */
2189 bsg_job_done(job, ret, reslen);