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>
28 #include "sas_internal.h"
30 #include <scsi/scsi_transport.h>
31 #include <scsi/scsi_transport_sas.h>
32 #include "../scsi_sas_internal.h"
34 static int sas_discover_expander(struct domain_device *dev);
35 static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr);
36 static int sas_configure_phy(struct domain_device *dev, int phy_id,
37 u8 *sas_addr, int include);
38 static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr);
40 /* ---------- SMP task management ---------- */
42 static void smp_task_timedout(unsigned long _task)
44 struct sas_task *task = (void *) _task;
47 spin_lock_irqsave(&task->task_state_lock, flags);
48 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
49 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
50 spin_unlock_irqrestore(&task->task_state_lock, flags);
52 complete(&task->completion);
55 static void smp_task_done(struct sas_task *task)
57 if (!del_timer(&task->timer))
59 complete(&task->completion);
62 /* Give it some long enough timeout. In seconds. */
63 #define SMP_TIMEOUT 10
65 static int smp_execute_task(struct domain_device *dev, void *req, int req_size,
66 void *resp, int resp_size)
69 struct sas_task *task = NULL;
70 struct sas_internal *i =
71 to_sas_internal(dev->port->ha->core.shost->transportt);
73 for (retry = 0; retry < 3; retry++) {
74 task = sas_alloc_task(GFP_KERNEL);
79 task->task_proto = dev->tproto;
80 sg_init_one(&task->smp_task.smp_req, req, req_size);
81 sg_init_one(&task->smp_task.smp_resp, resp, resp_size);
83 task->task_done = smp_task_done;
85 task->timer.data = (unsigned long) task;
86 task->timer.function = smp_task_timedout;
87 task->timer.expires = jiffies + SMP_TIMEOUT*HZ;
88 add_timer(&task->timer);
90 res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL);
93 del_timer(&task->timer);
94 SAS_DPRINTK("executing SMP task failed:%d\n", res);
98 wait_for_completion(&task->completion);
100 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
101 SAS_DPRINTK("smp task timed out or aborted\n");
102 i->dft->lldd_abort_task(task);
103 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
104 SAS_DPRINTK("SMP task aborted and not done\n");
108 if (task->task_status.resp == SAS_TASK_COMPLETE &&
109 task->task_status.stat == SAM_GOOD) {
113 SAS_DPRINTK("%s: task to dev %016llx response: 0x%x "
114 "status 0x%x\n", __FUNCTION__,
115 SAS_ADDR(dev->sas_addr),
116 task->task_status.resp,
117 task->task_status.stat);
123 BUG_ON(retry == 3 && task != NULL);
130 /* ---------- Allocations ---------- */
132 static inline void *alloc_smp_req(int size)
134 u8 *p = kzalloc(size, GFP_KERNEL);
140 static inline void *alloc_smp_resp(int size)
142 return kzalloc(size, GFP_KERNEL);
145 /* ---------- Expander configuration ---------- */
147 static void sas_set_ex_phy(struct domain_device *dev, int phy_id,
150 struct expander_device *ex = &dev->ex_dev;
151 struct ex_phy *phy = &ex->ex_phy[phy_id];
152 struct smp_resp *resp = disc_resp;
153 struct discover_resp *dr = &resp->disc;
154 struct sas_rphy *rphy = dev->rphy;
155 int rediscover = (phy->phy != NULL);
158 phy->phy = sas_phy_alloc(&rphy->dev, phy_id);
160 /* FIXME: error_handling */
164 switch (resp->result) {
165 case SMP_RESP_PHY_VACANT:
166 phy->phy_state = PHY_VACANT;
169 phy->phy_state = PHY_NOT_PRESENT;
171 case SMP_RESP_FUNC_ACC:
172 phy->phy_state = PHY_EMPTY; /* do not know yet */
176 phy->phy_id = phy_id;
177 phy->attached_dev_type = dr->attached_dev_type;
178 phy->linkrate = dr->linkrate;
179 phy->attached_sata_host = dr->attached_sata_host;
180 phy->attached_sata_dev = dr->attached_sata_dev;
181 phy->attached_sata_ps = dr->attached_sata_ps;
182 phy->attached_iproto = dr->iproto << 1;
183 phy->attached_tproto = dr->tproto << 1;
184 memcpy(phy->attached_sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE);
185 phy->attached_phy_id = dr->attached_phy_id;
186 phy->phy_change_count = dr->change_count;
187 phy->routing_attr = dr->routing_attr;
188 phy->virtual = dr->virtual;
189 phy->last_da_index = -1;
191 phy->phy->identify.initiator_port_protocols = phy->attached_iproto;
192 phy->phy->identify.target_port_protocols = phy->attached_tproto;
193 phy->phy->identify.phy_identifier = phy_id;
194 phy->phy->minimum_linkrate_hw = dr->hmin_linkrate;
195 phy->phy->maximum_linkrate_hw = dr->hmax_linkrate;
196 phy->phy->minimum_linkrate = dr->pmin_linkrate;
197 phy->phy->maximum_linkrate = dr->pmax_linkrate;
198 phy->phy->negotiated_linkrate = phy->linkrate;
201 sas_phy_add(phy->phy);
203 SAS_DPRINTK("ex %016llx phy%02d:%c attached: %016llx\n",
204 SAS_ADDR(dev->sas_addr), phy->phy_id,
205 phy->routing_attr == TABLE_ROUTING ? 'T' :
206 phy->routing_attr == DIRECT_ROUTING ? 'D' :
207 phy->routing_attr == SUBTRACTIVE_ROUTING ? 'S' : '?',
208 SAS_ADDR(phy->attached_sas_addr));
213 #define DISCOVER_REQ_SIZE 16
214 #define DISCOVER_RESP_SIZE 56
216 static int sas_ex_phy_discover_helper(struct domain_device *dev, u8 *disc_req,
217 u8 *disc_resp, int single)
221 disc_req[9] = single;
222 for (i = 1 ; i < 3; i++) {
223 struct discover_resp *dr;
225 res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE,
226 disc_resp, DISCOVER_RESP_SIZE);
229 /* This is detecting a failure to transmit inital
230 * dev to host FIS as described in section G.5 of
232 dr = &((struct smp_resp *)disc_resp)->disc;
233 if (!(dr->attached_dev_type == 0 &&
234 dr->attached_sata_dev))
236 /* In order to generate the dev to host FIS, we
237 * send a link reset to the expander port */
238 sas_smp_phy_control(dev, single, PHY_FUNC_LINK_RESET, NULL);
239 /* Wait for the reset to trigger the negotiation */
242 sas_set_ex_phy(dev, single, disc_resp);
246 static int sas_ex_phy_discover(struct domain_device *dev, int single)
248 struct expander_device *ex = &dev->ex_dev;
253 disc_req = alloc_smp_req(DISCOVER_REQ_SIZE);
257 disc_resp = alloc_smp_req(DISCOVER_RESP_SIZE);
263 disc_req[1] = SMP_DISCOVER;
265 if (0 <= single && single < ex->num_phys) {
266 res = sas_ex_phy_discover_helper(dev, disc_req, disc_resp, single);
270 for (i = 0; i < ex->num_phys; i++) {
271 res = sas_ex_phy_discover_helper(dev, disc_req,
283 static int sas_expander_discover(struct domain_device *dev)
285 struct expander_device *ex = &dev->ex_dev;
288 ex->ex_phy = kzalloc(sizeof(*ex->ex_phy)*ex->num_phys, GFP_KERNEL);
292 res = sas_ex_phy_discover(dev, -1);
303 #define MAX_EXPANDER_PHYS 128
305 static void ex_assign_report_general(struct domain_device *dev,
306 struct smp_resp *resp)
308 struct report_general_resp *rg = &resp->rg;
310 dev->ex_dev.ex_change_count = be16_to_cpu(rg->change_count);
311 dev->ex_dev.max_route_indexes = be16_to_cpu(rg->route_indexes);
312 dev->ex_dev.num_phys = min(rg->num_phys, (u8)MAX_EXPANDER_PHYS);
313 dev->ex_dev.conf_route_table = rg->conf_route_table;
314 dev->ex_dev.configuring = rg->configuring;
315 memcpy(dev->ex_dev.enclosure_logical_id, rg->enclosure_logical_id, 8);
318 #define RG_REQ_SIZE 8
319 #define RG_RESP_SIZE 32
321 static int sas_ex_general(struct domain_device *dev)
324 struct smp_resp *rg_resp;
328 rg_req = alloc_smp_req(RG_REQ_SIZE);
332 rg_resp = alloc_smp_resp(RG_RESP_SIZE);
338 rg_req[1] = SMP_REPORT_GENERAL;
340 for (i = 0; i < 5; i++) {
341 res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp,
345 SAS_DPRINTK("RG to ex %016llx failed:0x%x\n",
346 SAS_ADDR(dev->sas_addr), res);
348 } else if (rg_resp->result != SMP_RESP_FUNC_ACC) {
349 SAS_DPRINTK("RG:ex %016llx returned SMP result:0x%x\n",
350 SAS_ADDR(dev->sas_addr), rg_resp->result);
351 res = rg_resp->result;
355 ex_assign_report_general(dev, rg_resp);
357 if (dev->ex_dev.configuring) {
358 SAS_DPRINTK("RG: ex %llx self-configuring...\n",
359 SAS_ADDR(dev->sas_addr));
360 schedule_timeout_interruptible(5*HZ);
370 static void ex_assign_manuf_info(struct domain_device *dev, void
373 u8 *mi_resp = _mi_resp;
374 struct sas_rphy *rphy = dev->rphy;
375 struct sas_expander_device *edev = rphy_to_expander_device(rphy);
377 memcpy(edev->vendor_id, mi_resp + 12, SAS_EXPANDER_VENDOR_ID_LEN);
378 memcpy(edev->product_id, mi_resp + 20, SAS_EXPANDER_PRODUCT_ID_LEN);
379 memcpy(edev->product_rev, mi_resp + 36,
380 SAS_EXPANDER_PRODUCT_REV_LEN);
382 if (mi_resp[8] & 1) {
383 memcpy(edev->component_vendor_id, mi_resp + 40,
384 SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN);
385 edev->component_id = mi_resp[48] << 8 | mi_resp[49];
386 edev->component_revision_id = mi_resp[50];
390 #define MI_REQ_SIZE 8
391 #define MI_RESP_SIZE 64
393 static int sas_ex_manuf_info(struct domain_device *dev)
399 mi_req = alloc_smp_req(MI_REQ_SIZE);
403 mi_resp = alloc_smp_resp(MI_RESP_SIZE);
409 mi_req[1] = SMP_REPORT_MANUF_INFO;
411 res = smp_execute_task(dev, mi_req, MI_REQ_SIZE, mi_resp,MI_RESP_SIZE);
413 SAS_DPRINTK("MI: ex %016llx failed:0x%x\n",
414 SAS_ADDR(dev->sas_addr), res);
416 } else if (mi_resp[2] != SMP_RESP_FUNC_ACC) {
417 SAS_DPRINTK("MI ex %016llx returned SMP result:0x%x\n",
418 SAS_ADDR(dev->sas_addr), mi_resp[2]);
422 ex_assign_manuf_info(dev, mi_resp);
429 #define PC_REQ_SIZE 44
430 #define PC_RESP_SIZE 8
432 int sas_smp_phy_control(struct domain_device *dev, int phy_id,
433 enum phy_func phy_func,
434 struct sas_phy_linkrates *rates)
440 pc_req = alloc_smp_req(PC_REQ_SIZE);
444 pc_resp = alloc_smp_resp(PC_RESP_SIZE);
450 pc_req[1] = SMP_PHY_CONTROL;
452 pc_req[10]= phy_func;
454 pc_req[32] = rates->minimum_linkrate << 4;
455 pc_req[33] = rates->maximum_linkrate << 4;
458 res = smp_execute_task(dev, pc_req, PC_REQ_SIZE, pc_resp,PC_RESP_SIZE);
465 static void sas_ex_disable_phy(struct domain_device *dev, int phy_id)
467 struct expander_device *ex = &dev->ex_dev;
468 struct ex_phy *phy = &ex->ex_phy[phy_id];
470 sas_smp_phy_control(dev, phy_id, PHY_FUNC_DISABLE, NULL);
471 phy->linkrate = SAS_PHY_DISABLED;
474 static void sas_ex_disable_port(struct domain_device *dev, u8 *sas_addr)
476 struct expander_device *ex = &dev->ex_dev;
479 for (i = 0; i < ex->num_phys; i++) {
480 struct ex_phy *phy = &ex->ex_phy[i];
482 if (phy->phy_state == PHY_VACANT ||
483 phy->phy_state == PHY_NOT_PRESENT)
486 if (SAS_ADDR(phy->attached_sas_addr) == SAS_ADDR(sas_addr))
487 sas_ex_disable_phy(dev, i);
491 static int sas_dev_present_in_domain(struct asd_sas_port *port,
494 struct domain_device *dev;
496 if (SAS_ADDR(port->sas_addr) == SAS_ADDR(sas_addr))
498 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
499 if (SAS_ADDR(dev->sas_addr) == SAS_ADDR(sas_addr))
505 #define RPEL_REQ_SIZE 16
506 #define RPEL_RESP_SIZE 32
507 int sas_smp_get_phy_events(struct sas_phy *phy)
510 struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent);
511 struct domain_device *dev = sas_find_dev_by_rphy(rphy);
512 u8 *req = alloc_smp_req(RPEL_REQ_SIZE);
513 u8 *resp = kzalloc(RPEL_RESP_SIZE, GFP_KERNEL);
518 req[1] = SMP_REPORT_PHY_ERR_LOG;
519 req[9] = phy->number;
521 res = smp_execute_task(dev, req, RPEL_REQ_SIZE,
522 resp, RPEL_RESP_SIZE);
527 phy->invalid_dword_count = scsi_to_u32(&resp[12]);
528 phy->running_disparity_error_count = scsi_to_u32(&resp[16]);
529 phy->loss_of_dword_sync_count = scsi_to_u32(&resp[20]);
530 phy->phy_reset_problem_count = scsi_to_u32(&resp[24]);
538 #ifdef CONFIG_SCSI_SAS_ATA
540 #define RPS_REQ_SIZE 16
541 #define RPS_RESP_SIZE 60
543 static int sas_get_report_phy_sata(struct domain_device *dev,
545 struct smp_resp *rps_resp)
548 u8 *rps_req = alloc_smp_req(RPS_REQ_SIZE);
549 u8 *resp = (u8 *)rps_resp;
554 rps_req[1] = SMP_REPORT_PHY_SATA;
557 res = smp_execute_task(dev, rps_req, RPS_REQ_SIZE,
558 rps_resp, RPS_RESP_SIZE);
560 /* 0x34 is the FIS type for the D2H fis. There's a potential
561 * standards cockup here. sas-2 explicitly specifies the FIS
562 * should be encoded so that FIS type is in resp[24].
563 * However, some expanders endian reverse this. Undo the
565 if (!res && resp[27] == 0x34 && resp[24] != 0x34) {
568 for (i = 0; i < 5; i++) {
573 resp[j + 0] = resp[j + 3];
574 resp[j + 1] = resp[j + 2];
585 static void sas_ex_get_linkrate(struct domain_device *parent,
586 struct domain_device *child,
587 struct ex_phy *parent_phy)
589 struct expander_device *parent_ex = &parent->ex_dev;
590 struct sas_port *port;
595 port = parent_phy->port;
597 for (i = 0; i < parent_ex->num_phys; i++) {
598 struct ex_phy *phy = &parent_ex->ex_phy[i];
600 if (phy->phy_state == PHY_VACANT ||
601 phy->phy_state == PHY_NOT_PRESENT)
604 if (SAS_ADDR(phy->attached_sas_addr) ==
605 SAS_ADDR(child->sas_addr)) {
607 child->min_linkrate = min(parent->min_linkrate,
609 child->max_linkrate = max(parent->max_linkrate,
612 sas_port_add_phy(port, phy->phy);
615 child->linkrate = min(parent_phy->linkrate, child->max_linkrate);
616 child->pathways = min(child->pathways, parent->pathways);
619 static struct domain_device *sas_ex_discover_end_dev(
620 struct domain_device *parent, int phy_id)
622 struct expander_device *parent_ex = &parent->ex_dev;
623 struct ex_phy *phy = &parent_ex->ex_phy[phy_id];
624 struct domain_device *child = NULL;
625 struct sas_rphy *rphy;
628 if (phy->attached_sata_host || phy->attached_sata_ps)
631 child = kzalloc(sizeof(*child), GFP_KERNEL);
635 child->parent = parent;
636 child->port = parent->port;
637 child->iproto = phy->attached_iproto;
638 memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
639 sas_hash_addr(child->hashed_sas_addr, child->sas_addr);
641 phy->port = sas_port_alloc(&parent->rphy->dev, phy_id);
642 if (unlikely(!phy->port))
644 if (unlikely(sas_port_add(phy->port) != 0)) {
645 sas_port_free(phy->port);
649 sas_ex_get_linkrate(parent, child, phy);
651 #ifdef CONFIG_SCSI_SAS_ATA
652 if ((phy->attached_tproto & SAS_PROTO_STP) || phy->attached_sata_dev) {
653 child->dev_type = SATA_DEV;
654 if (phy->attached_tproto & SAS_PROTO_STP)
655 child->tproto = phy->attached_tproto;
656 if (phy->attached_sata_dev)
657 child->tproto |= SATA_DEV;
658 res = sas_get_report_phy_sata(parent, phy_id,
659 &child->sata_dev.rps_resp);
661 SAS_DPRINTK("report phy sata to %016llx:0x%x returned "
662 "0x%x\n", SAS_ADDR(parent->sas_addr),
666 memcpy(child->frame_rcvd, &child->sata_dev.rps_resp.rps.fis,
667 sizeof(struct dev_to_host_fis));
669 rphy = sas_end_device_alloc(phy->port);
677 spin_lock_irq(&parent->port->dev_list_lock);
678 list_add_tail(&child->dev_list_node, &parent->port->dev_list);
679 spin_unlock_irq(&parent->port->dev_list_lock);
681 res = sas_discover_sata(child);
683 SAS_DPRINTK("sas_discover_sata() for device %16llx at "
684 "%016llx:0x%x returned 0x%x\n",
685 SAS_ADDR(child->sas_addr),
686 SAS_ADDR(parent->sas_addr), phy_id, res);
691 if (phy->attached_tproto & SAS_PROTO_SSP) {
692 child->dev_type = SAS_END_DEV;
693 rphy = sas_end_device_alloc(phy->port);
694 /* FIXME: error handling */
697 child->tproto = phy->attached_tproto;
701 sas_fill_in_rphy(child, rphy);
703 spin_lock_irq(&parent->port->dev_list_lock);
704 list_add_tail(&child->dev_list_node, &parent->port->dev_list);
705 spin_unlock_irq(&parent->port->dev_list_lock);
707 res = sas_discover_end_dev(child);
709 SAS_DPRINTK("sas_discover_end_dev() for device %16llx "
710 "at %016llx:0x%x returned 0x%x\n",
711 SAS_ADDR(child->sas_addr),
712 SAS_ADDR(parent->sas_addr), phy_id, res);
716 SAS_DPRINTK("target proto 0x%x at %016llx:0x%x not handled\n",
717 phy->attached_tproto, SAS_ADDR(parent->sas_addr),
722 list_add_tail(&child->siblings, &parent_ex->children);
726 sas_rphy_free(child->rphy);
728 list_del(&child->dev_list_node);
730 sas_port_delete(phy->port);
737 /* See if this phy is part of a wide port */
738 static int sas_ex_join_wide_port(struct domain_device *parent, int phy_id)
740 struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id];
743 for (i = 0; i < parent->ex_dev.num_phys; i++) {
744 struct ex_phy *ephy = &parent->ex_dev.ex_phy[i];
749 if (!memcmp(phy->attached_sas_addr, ephy->attached_sas_addr,
750 SAS_ADDR_SIZE) && ephy->port) {
751 sas_port_add_phy(ephy->port, phy->phy);
752 phy->phy_state = PHY_DEVICE_DISCOVERED;
760 static struct domain_device *sas_ex_discover_expander(
761 struct domain_device *parent, int phy_id)
763 struct sas_expander_device *parent_ex = rphy_to_expander_device(parent->rphy);
764 struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id];
765 struct domain_device *child = NULL;
766 struct sas_rphy *rphy;
767 struct sas_expander_device *edev;
768 struct asd_sas_port *port;
771 if (phy->routing_attr == DIRECT_ROUTING) {
772 SAS_DPRINTK("ex %016llx:0x%x:D <--> ex %016llx:0x%x is not "
774 SAS_ADDR(parent->sas_addr), phy_id,
775 SAS_ADDR(phy->attached_sas_addr),
776 phy->attached_phy_id);
779 child = kzalloc(sizeof(*child), GFP_KERNEL);
783 phy->port = sas_port_alloc(&parent->rphy->dev, phy_id);
784 /* FIXME: better error handling */
785 BUG_ON(sas_port_add(phy->port) != 0);
788 switch (phy->attached_dev_type) {
790 rphy = sas_expander_alloc(phy->port,
791 SAS_EDGE_EXPANDER_DEVICE);
794 rphy = sas_expander_alloc(phy->port,
795 SAS_FANOUT_EXPANDER_DEVICE);
798 rphy = NULL; /* shut gcc up */
803 edev = rphy_to_expander_device(rphy);
804 child->dev_type = phy->attached_dev_type;
805 child->parent = parent;
807 child->iproto = phy->attached_iproto;
808 child->tproto = phy->attached_tproto;
809 memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
810 sas_hash_addr(child->hashed_sas_addr, child->sas_addr);
811 sas_ex_get_linkrate(parent, child, phy);
812 edev->level = parent_ex->level + 1;
813 parent->port->disc.max_level = max(parent->port->disc.max_level,
816 sas_fill_in_rphy(child, rphy);
819 spin_lock_irq(&parent->port->dev_list_lock);
820 list_add_tail(&child->dev_list_node, &parent->port->dev_list);
821 spin_unlock_irq(&parent->port->dev_list_lock);
823 res = sas_discover_expander(child);
828 list_add_tail(&child->siblings, &parent->ex_dev.children);
832 static int sas_ex_discover_dev(struct domain_device *dev, int phy_id)
834 struct expander_device *ex = &dev->ex_dev;
835 struct ex_phy *ex_phy = &ex->ex_phy[phy_id];
836 struct domain_device *child = NULL;
840 if (ex_phy->linkrate == SAS_SATA_SPINUP_HOLD) {
841 if (!sas_smp_phy_control(dev, phy_id, PHY_FUNC_LINK_RESET, NULL))
842 res = sas_ex_phy_discover(dev, phy_id);
847 /* Parent and domain coherency */
848 if (!dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) ==
849 SAS_ADDR(dev->port->sas_addr))) {
850 sas_add_parent_port(dev, phy_id);
853 if (dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) ==
854 SAS_ADDR(dev->parent->sas_addr))) {
855 sas_add_parent_port(dev, phy_id);
856 if (ex_phy->routing_attr == TABLE_ROUTING)
857 sas_configure_phy(dev, phy_id, dev->port->sas_addr, 1);
861 if (sas_dev_present_in_domain(dev->port, ex_phy->attached_sas_addr))
862 sas_ex_disable_port(dev, ex_phy->attached_sas_addr);
864 if (ex_phy->attached_dev_type == NO_DEVICE) {
865 if (ex_phy->routing_attr == DIRECT_ROUTING) {
866 memset(ex_phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
867 sas_configure_routing(dev, ex_phy->attached_sas_addr);
870 } else if (ex_phy->linkrate == SAS_LINK_RATE_UNKNOWN)
873 if (ex_phy->attached_dev_type != SAS_END_DEV &&
874 ex_phy->attached_dev_type != FANOUT_DEV &&
875 ex_phy->attached_dev_type != EDGE_DEV) {
876 SAS_DPRINTK("unknown device type(0x%x) attached to ex %016llx "
877 "phy 0x%x\n", ex_phy->attached_dev_type,
878 SAS_ADDR(dev->sas_addr),
883 res = sas_configure_routing(dev, ex_phy->attached_sas_addr);
885 SAS_DPRINTK("configure routing for dev %016llx "
886 "reported 0x%x. Forgotten\n",
887 SAS_ADDR(ex_phy->attached_sas_addr), res);
888 sas_disable_routing(dev, ex_phy->attached_sas_addr);
892 res = sas_ex_join_wide_port(dev, phy_id);
894 SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n",
895 phy_id, SAS_ADDR(ex_phy->attached_sas_addr));
899 switch (ex_phy->attached_dev_type) {
901 child = sas_ex_discover_end_dev(dev, phy_id);
904 if (SAS_ADDR(dev->port->disc.fanout_sas_addr)) {
905 SAS_DPRINTK("second fanout expander %016llx phy 0x%x "
906 "attached to ex %016llx phy 0x%x\n",
907 SAS_ADDR(ex_phy->attached_sas_addr),
908 ex_phy->attached_phy_id,
909 SAS_ADDR(dev->sas_addr),
911 sas_ex_disable_phy(dev, phy_id);
914 memcpy(dev->port->disc.fanout_sas_addr,
915 ex_phy->attached_sas_addr, SAS_ADDR_SIZE);
918 child = sas_ex_discover_expander(dev, phy_id);
927 for (i = 0; i < ex->num_phys; i++) {
928 if (ex->ex_phy[i].phy_state == PHY_VACANT ||
929 ex->ex_phy[i].phy_state == PHY_NOT_PRESENT)
932 if (SAS_ADDR(ex->ex_phy[i].attached_sas_addr) ==
933 SAS_ADDR(child->sas_addr))
934 ex->ex_phy[i].phy_state= PHY_DEVICE_DISCOVERED;
941 static int sas_find_sub_addr(struct domain_device *dev, u8 *sub_addr)
943 struct expander_device *ex = &dev->ex_dev;
946 for (i = 0; i < ex->num_phys; i++) {
947 struct ex_phy *phy = &ex->ex_phy[i];
949 if (phy->phy_state == PHY_VACANT ||
950 phy->phy_state == PHY_NOT_PRESENT)
953 if ((phy->attached_dev_type == EDGE_DEV ||
954 phy->attached_dev_type == FANOUT_DEV) &&
955 phy->routing_attr == SUBTRACTIVE_ROUTING) {
957 memcpy(sub_addr, phy->attached_sas_addr,SAS_ADDR_SIZE);
965 static int sas_check_level_subtractive_boundary(struct domain_device *dev)
967 struct expander_device *ex = &dev->ex_dev;
968 struct domain_device *child;
969 u8 sub_addr[8] = {0, };
971 list_for_each_entry(child, &ex->children, siblings) {
972 if (child->dev_type != EDGE_DEV &&
973 child->dev_type != FANOUT_DEV)
975 if (sub_addr[0] == 0) {
976 sas_find_sub_addr(child, sub_addr);
981 if (sas_find_sub_addr(child, s2) &&
982 (SAS_ADDR(sub_addr) != SAS_ADDR(s2))) {
984 SAS_DPRINTK("ex %016llx->%016llx-?->%016llx "
985 "diverges from subtractive "
986 "boundary %016llx\n",
987 SAS_ADDR(dev->sas_addr),
988 SAS_ADDR(child->sas_addr),
992 sas_ex_disable_port(child, s2);
999 * sas_ex_discover_devices -- discover devices attached to this expander
1000 * dev: pointer to the expander domain device
1001 * single: if you want to do a single phy, else set to -1;
1003 * Configure this expander for use with its devices and register the
1004 * devices of this expander.
1006 static int sas_ex_discover_devices(struct domain_device *dev, int single)
1008 struct expander_device *ex = &dev->ex_dev;
1009 int i = 0, end = ex->num_phys;
1012 if (0 <= single && single < end) {
1017 for ( ; i < end; i++) {
1018 struct ex_phy *ex_phy = &ex->ex_phy[i];
1020 if (ex_phy->phy_state == PHY_VACANT ||
1021 ex_phy->phy_state == PHY_NOT_PRESENT ||
1022 ex_phy->phy_state == PHY_DEVICE_DISCOVERED)
1025 switch (ex_phy->linkrate) {
1026 case SAS_PHY_DISABLED:
1027 case SAS_PHY_RESET_PROBLEM:
1028 case SAS_SATA_PORT_SELECTOR:
1031 res = sas_ex_discover_dev(dev, i);
1039 sas_check_level_subtractive_boundary(dev);
1044 static int sas_check_ex_subtractive_boundary(struct domain_device *dev)
1046 struct expander_device *ex = &dev->ex_dev;
1048 u8 *sub_sas_addr = NULL;
1050 if (dev->dev_type != EDGE_DEV)
1053 for (i = 0; i < ex->num_phys; i++) {
1054 struct ex_phy *phy = &ex->ex_phy[i];
1056 if (phy->phy_state == PHY_VACANT ||
1057 phy->phy_state == PHY_NOT_PRESENT)
1060 if ((phy->attached_dev_type == FANOUT_DEV ||
1061 phy->attached_dev_type == EDGE_DEV) &&
1062 phy->routing_attr == SUBTRACTIVE_ROUTING) {
1065 sub_sas_addr = &phy->attached_sas_addr[0];
1066 else if (SAS_ADDR(sub_sas_addr) !=
1067 SAS_ADDR(phy->attached_sas_addr)) {
1069 SAS_DPRINTK("ex %016llx phy 0x%x "
1070 "diverges(%016llx) on subtractive "
1071 "boundary(%016llx). Disabled\n",
1072 SAS_ADDR(dev->sas_addr), i,
1073 SAS_ADDR(phy->attached_sas_addr),
1074 SAS_ADDR(sub_sas_addr));
1075 sas_ex_disable_phy(dev, i);
1082 static void sas_print_parent_topology_bug(struct domain_device *child,
1083 struct ex_phy *parent_phy,
1084 struct ex_phy *child_phy)
1086 static const char ra_char[] = {
1087 [DIRECT_ROUTING] = 'D',
1088 [SUBTRACTIVE_ROUTING] = 'S',
1089 [TABLE_ROUTING] = 'T',
1091 static const char *ex_type[] = {
1092 [EDGE_DEV] = "edge",
1093 [FANOUT_DEV] = "fanout",
1095 struct domain_device *parent = child->parent;
1097 sas_printk("%s ex %016llx phy 0x%x <--> %s ex %016llx phy 0x%x "
1098 "has %c:%c routing link!\n",
1100 ex_type[parent->dev_type],
1101 SAS_ADDR(parent->sas_addr),
1104 ex_type[child->dev_type],
1105 SAS_ADDR(child->sas_addr),
1108 ra_char[parent_phy->routing_attr],
1109 ra_char[child_phy->routing_attr]);
1112 static int sas_check_eeds(struct domain_device *child,
1113 struct ex_phy *parent_phy,
1114 struct ex_phy *child_phy)
1117 struct domain_device *parent = child->parent;
1119 if (SAS_ADDR(parent->port->disc.fanout_sas_addr) != 0) {
1121 SAS_DPRINTK("edge ex %016llx phy S:0x%x <--> edge ex %016llx "
1122 "phy S:0x%x, while there is a fanout ex %016llx\n",
1123 SAS_ADDR(parent->sas_addr),
1125 SAS_ADDR(child->sas_addr),
1127 SAS_ADDR(parent->port->disc.fanout_sas_addr));
1128 } else if (SAS_ADDR(parent->port->disc.eeds_a) == 0) {
1129 memcpy(parent->port->disc.eeds_a, parent->sas_addr,
1131 memcpy(parent->port->disc.eeds_b, child->sas_addr,
1133 } else if (((SAS_ADDR(parent->port->disc.eeds_a) ==
1134 SAS_ADDR(parent->sas_addr)) ||
1135 (SAS_ADDR(parent->port->disc.eeds_a) ==
1136 SAS_ADDR(child->sas_addr)))
1138 ((SAS_ADDR(parent->port->disc.eeds_b) ==
1139 SAS_ADDR(parent->sas_addr)) ||
1140 (SAS_ADDR(parent->port->disc.eeds_b) ==
1141 SAS_ADDR(child->sas_addr))))
1145 SAS_DPRINTK("edge ex %016llx phy 0x%x <--> edge ex %016llx "
1146 "phy 0x%x link forms a third EEDS!\n",
1147 SAS_ADDR(parent->sas_addr),
1149 SAS_ADDR(child->sas_addr),
1156 /* Here we spill over 80 columns. It is intentional.
1158 static int sas_check_parent_topology(struct domain_device *child)
1160 struct expander_device *child_ex = &child->ex_dev;
1161 struct expander_device *parent_ex;
1168 if (child->parent->dev_type != EDGE_DEV &&
1169 child->parent->dev_type != FANOUT_DEV)
1172 parent_ex = &child->parent->ex_dev;
1174 for (i = 0; i < parent_ex->num_phys; i++) {
1175 struct ex_phy *parent_phy = &parent_ex->ex_phy[i];
1176 struct ex_phy *child_phy;
1178 if (parent_phy->phy_state == PHY_VACANT ||
1179 parent_phy->phy_state == PHY_NOT_PRESENT)
1182 if (SAS_ADDR(parent_phy->attached_sas_addr) != SAS_ADDR(child->sas_addr))
1185 child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id];
1187 switch (child->parent->dev_type) {
1189 if (child->dev_type == FANOUT_DEV) {
1190 if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING ||
1191 child_phy->routing_attr != TABLE_ROUTING) {
1192 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1195 } else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) {
1196 if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) {
1197 res = sas_check_eeds(child, parent_phy, child_phy);
1198 } else if (child_phy->routing_attr != TABLE_ROUTING) {
1199 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1202 } else if (parent_phy->routing_attr == TABLE_ROUTING &&
1203 child_phy->routing_attr != SUBTRACTIVE_ROUTING) {
1204 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1209 if (parent_phy->routing_attr != TABLE_ROUTING ||
1210 child_phy->routing_attr != SUBTRACTIVE_ROUTING) {
1211 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1223 #define RRI_REQ_SIZE 16
1224 #define RRI_RESP_SIZE 44
1226 static int sas_configure_present(struct domain_device *dev, int phy_id,
1227 u8 *sas_addr, int *index, int *present)
1230 struct expander_device *ex = &dev->ex_dev;
1231 struct ex_phy *phy = &ex->ex_phy[phy_id];
1238 rri_req = alloc_smp_req(RRI_REQ_SIZE);
1242 rri_resp = alloc_smp_resp(RRI_RESP_SIZE);
1248 rri_req[1] = SMP_REPORT_ROUTE_INFO;
1249 rri_req[9] = phy_id;
1251 for (i = 0; i < ex->max_route_indexes ; i++) {
1252 *(__be16 *)(rri_req+6) = cpu_to_be16(i);
1253 res = smp_execute_task(dev, rri_req, RRI_REQ_SIZE, rri_resp,
1258 if (res == SMP_RESP_NO_INDEX) {
1259 SAS_DPRINTK("overflow of indexes: dev %016llx "
1260 "phy 0x%x index 0x%x\n",
1261 SAS_ADDR(dev->sas_addr), phy_id, i);
1263 } else if (res != SMP_RESP_FUNC_ACC) {
1264 SAS_DPRINTK("%s: dev %016llx phy 0x%x index 0x%x "
1265 "result 0x%x\n", __FUNCTION__,
1266 SAS_ADDR(dev->sas_addr), phy_id, i, res);
1269 if (SAS_ADDR(sas_addr) != 0) {
1270 if (SAS_ADDR(rri_resp+16) == SAS_ADDR(sas_addr)) {
1272 if ((rri_resp[12] & 0x80) == 0x80)
1277 } else if (SAS_ADDR(rri_resp+16) == 0) {
1282 } else if (SAS_ADDR(rri_resp+16) == 0 &&
1283 phy->last_da_index < i) {
1284 phy->last_da_index = i;
1297 #define CRI_REQ_SIZE 44
1298 #define CRI_RESP_SIZE 8
1300 static int sas_configure_set(struct domain_device *dev, int phy_id,
1301 u8 *sas_addr, int index, int include)
1307 cri_req = alloc_smp_req(CRI_REQ_SIZE);
1311 cri_resp = alloc_smp_resp(CRI_RESP_SIZE);
1317 cri_req[1] = SMP_CONF_ROUTE_INFO;
1318 *(__be16 *)(cri_req+6) = cpu_to_be16(index);
1319 cri_req[9] = phy_id;
1320 if (SAS_ADDR(sas_addr) == 0 || !include)
1321 cri_req[12] |= 0x80;
1322 memcpy(cri_req+16, sas_addr, SAS_ADDR_SIZE);
1324 res = smp_execute_task(dev, cri_req, CRI_REQ_SIZE, cri_resp,
1329 if (res == SMP_RESP_NO_INDEX) {
1330 SAS_DPRINTK("overflow of indexes: dev %016llx phy 0x%x "
1332 SAS_ADDR(dev->sas_addr), phy_id, index);
1340 static int sas_configure_phy(struct domain_device *dev, int phy_id,
1341 u8 *sas_addr, int include)
1347 res = sas_configure_present(dev, phy_id, sas_addr, &index, &present);
1350 if (include ^ present)
1351 return sas_configure_set(dev, phy_id, sas_addr, index,include);
1357 * sas_configure_parent -- configure routing table of parent
1358 * parent: parent expander
1359 * child: child expander
1360 * sas_addr: SAS port identifier of device directly attached to child
1362 static int sas_configure_parent(struct domain_device *parent,
1363 struct domain_device *child,
1364 u8 *sas_addr, int include)
1366 struct expander_device *ex_parent = &parent->ex_dev;
1370 if (parent->parent) {
1371 res = sas_configure_parent(parent->parent, parent, sas_addr,
1377 if (ex_parent->conf_route_table == 0) {
1378 SAS_DPRINTK("ex %016llx has self-configuring routing table\n",
1379 SAS_ADDR(parent->sas_addr));
1383 for (i = 0; i < ex_parent->num_phys; i++) {
1384 struct ex_phy *phy = &ex_parent->ex_phy[i];
1386 if ((phy->routing_attr == TABLE_ROUTING) &&
1387 (SAS_ADDR(phy->attached_sas_addr) ==
1388 SAS_ADDR(child->sas_addr))) {
1389 res = sas_configure_phy(parent, i, sas_addr, include);
1399 * sas_configure_routing -- configure routing
1400 * dev: expander device
1401 * sas_addr: port identifier of device directly attached to the expander device
1403 static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr)
1406 return sas_configure_parent(dev->parent, dev, sas_addr, 1);
1410 static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr)
1413 return sas_configure_parent(dev->parent, dev, sas_addr, 0);
1418 * sas_discover_expander -- expander discovery
1419 * @ex: pointer to expander domain device
1421 * See comment in sas_discover_sata().
1423 static int sas_discover_expander(struct domain_device *dev)
1427 res = sas_notify_lldd_dev_found(dev);
1431 res = sas_ex_general(dev);
1434 res = sas_ex_manuf_info(dev);
1438 res = sas_expander_discover(dev);
1440 SAS_DPRINTK("expander %016llx discovery failed(0x%x)\n",
1441 SAS_ADDR(dev->sas_addr), res);
1445 sas_check_ex_subtractive_boundary(dev);
1446 res = sas_check_parent_topology(dev);
1451 sas_notify_lldd_dev_gone(dev);
1455 static int sas_ex_level_discovery(struct asd_sas_port *port, const int level)
1458 struct domain_device *dev;
1460 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
1461 if (dev->dev_type == EDGE_DEV ||
1462 dev->dev_type == FANOUT_DEV) {
1463 struct sas_expander_device *ex =
1464 rphy_to_expander_device(dev->rphy);
1466 if (level == ex->level)
1467 res = sas_ex_discover_devices(dev, -1);
1469 res = sas_ex_discover_devices(port->port_dev, -1);
1477 static int sas_ex_bfs_disc(struct asd_sas_port *port)
1483 level = port->disc.max_level;
1484 res = sas_ex_level_discovery(port, level);
1486 } while (level < port->disc.max_level);
1491 int sas_discover_root_expander(struct domain_device *dev)
1494 struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy);
1496 res = sas_rphy_add(dev->rphy);
1500 ex->level = dev->port->disc.max_level; /* 0 */
1501 res = sas_discover_expander(dev);
1505 sas_ex_bfs_disc(dev->port);
1510 sas_rphy_remove(dev->rphy);
1515 /* ---------- Domain revalidation ---------- */
1517 static int sas_get_phy_discover(struct domain_device *dev,
1518 int phy_id, struct smp_resp *disc_resp)
1523 disc_req = alloc_smp_req(DISCOVER_REQ_SIZE);
1527 disc_req[1] = SMP_DISCOVER;
1528 disc_req[9] = phy_id;
1530 res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE,
1531 disc_resp, DISCOVER_RESP_SIZE);
1534 else if (disc_resp->result != SMP_RESP_FUNC_ACC) {
1535 res = disc_resp->result;
1543 static int sas_get_phy_change_count(struct domain_device *dev,
1544 int phy_id, int *pcc)
1547 struct smp_resp *disc_resp;
1549 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
1553 res = sas_get_phy_discover(dev, phy_id, disc_resp);
1555 *pcc = disc_resp->disc.change_count;
1561 static int sas_get_phy_attached_sas_addr(struct domain_device *dev,
1562 int phy_id, u8 *attached_sas_addr)
1565 struct smp_resp *disc_resp;
1566 struct discover_resp *dr;
1568 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
1571 dr = &disc_resp->disc;
1573 res = sas_get_phy_discover(dev, phy_id, disc_resp);
1575 memcpy(attached_sas_addr,disc_resp->disc.attached_sas_addr,8);
1576 if (dr->attached_dev_type == 0)
1577 memset(attached_sas_addr, 0, 8);
1583 static int sas_find_bcast_phy(struct domain_device *dev, int *phy_id,
1586 struct expander_device *ex = &dev->ex_dev;
1590 for (i = from_phy; i < ex->num_phys; i++) {
1591 int phy_change_count = 0;
1593 res = sas_get_phy_change_count(dev, i, &phy_change_count);
1596 else if (phy_change_count != ex->ex_phy[i].phy_change_count) {
1597 ex->ex_phy[i].phy_change_count = phy_change_count;
1606 static int sas_get_ex_change_count(struct domain_device *dev, int *ecc)
1610 struct smp_resp *rg_resp;
1612 rg_req = alloc_smp_req(RG_REQ_SIZE);
1616 rg_resp = alloc_smp_resp(RG_RESP_SIZE);
1622 rg_req[1] = SMP_REPORT_GENERAL;
1624 res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp,
1628 if (rg_resp->result != SMP_RESP_FUNC_ACC) {
1629 res = rg_resp->result;
1633 *ecc = be16_to_cpu(rg_resp->rg.change_count);
1640 static int sas_find_bcast_dev(struct domain_device *dev,
1641 struct domain_device **src_dev)
1643 struct expander_device *ex = &dev->ex_dev;
1644 int ex_change_count = -1;
1647 res = sas_get_ex_change_count(dev, &ex_change_count);
1650 if (ex_change_count != -1 &&
1651 ex_change_count != ex->ex_change_count) {
1653 ex->ex_change_count = ex_change_count;
1655 struct domain_device *ch;
1657 list_for_each_entry(ch, &ex->children, siblings) {
1658 if (ch->dev_type == EDGE_DEV ||
1659 ch->dev_type == FANOUT_DEV) {
1660 res = sas_find_bcast_dev(ch, src_dev);
1670 static void sas_unregister_ex_tree(struct domain_device *dev)
1672 struct expander_device *ex = &dev->ex_dev;
1673 struct domain_device *child, *n;
1675 list_for_each_entry_safe(child, n, &ex->children, siblings) {
1676 if (child->dev_type == EDGE_DEV ||
1677 child->dev_type == FANOUT_DEV)
1678 sas_unregister_ex_tree(child);
1680 sas_unregister_dev(child);
1682 sas_unregister_dev(dev);
1685 static void sas_unregister_devs_sas_addr(struct domain_device *parent,
1688 struct expander_device *ex_dev = &parent->ex_dev;
1689 struct ex_phy *phy = &ex_dev->ex_phy[phy_id];
1690 struct domain_device *child, *n;
1692 list_for_each_entry_safe(child, n, &ex_dev->children, siblings) {
1693 if (SAS_ADDR(child->sas_addr) ==
1694 SAS_ADDR(phy->attached_sas_addr)) {
1695 if (child->dev_type == EDGE_DEV ||
1696 child->dev_type == FANOUT_DEV)
1697 sas_unregister_ex_tree(child);
1699 sas_unregister_dev(child);
1703 sas_disable_routing(parent, phy->attached_sas_addr);
1704 memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
1705 sas_port_delete_phy(phy->port, phy->phy);
1706 if (phy->port->num_phys == 0)
1707 sas_port_delete(phy->port);
1711 static int sas_discover_bfs_by_root_level(struct domain_device *root,
1714 struct expander_device *ex_root = &root->ex_dev;
1715 struct domain_device *child;
1718 list_for_each_entry(child, &ex_root->children, siblings) {
1719 if (child->dev_type == EDGE_DEV ||
1720 child->dev_type == FANOUT_DEV) {
1721 struct sas_expander_device *ex =
1722 rphy_to_expander_device(child->rphy);
1724 if (level > ex->level)
1725 res = sas_discover_bfs_by_root_level(child,
1727 else if (level == ex->level)
1728 res = sas_ex_discover_devices(child, -1);
1734 static int sas_discover_bfs_by_root(struct domain_device *dev)
1737 struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy);
1738 int level = ex->level+1;
1740 res = sas_ex_discover_devices(dev, -1);
1744 res = sas_discover_bfs_by_root_level(dev, level);
1747 } while (level <= dev->port->disc.max_level);
1752 static int sas_discover_new(struct domain_device *dev, int phy_id)
1754 struct ex_phy *ex_phy = &dev->ex_dev.ex_phy[phy_id];
1755 struct domain_device *child;
1758 SAS_DPRINTK("ex %016llx phy%d new device attached\n",
1759 SAS_ADDR(dev->sas_addr), phy_id);
1760 res = sas_ex_phy_discover(dev, phy_id);
1763 res = sas_ex_discover_devices(dev, phy_id);
1766 list_for_each_entry(child, &dev->ex_dev.children, siblings) {
1767 if (SAS_ADDR(child->sas_addr) ==
1768 SAS_ADDR(ex_phy->attached_sas_addr)) {
1769 if (child->dev_type == EDGE_DEV ||
1770 child->dev_type == FANOUT_DEV)
1771 res = sas_discover_bfs_by_root(child);
1779 static int sas_rediscover_dev(struct domain_device *dev, int phy_id)
1781 struct expander_device *ex = &dev->ex_dev;
1782 struct ex_phy *phy = &ex->ex_phy[phy_id];
1783 u8 attached_sas_addr[8];
1786 res = sas_get_phy_attached_sas_addr(dev, phy_id, attached_sas_addr);
1788 case SMP_RESP_NO_PHY:
1789 phy->phy_state = PHY_NOT_PRESENT;
1790 sas_unregister_devs_sas_addr(dev, phy_id);
1792 case SMP_RESP_PHY_VACANT:
1793 phy->phy_state = PHY_VACANT;
1794 sas_unregister_devs_sas_addr(dev, phy_id);
1796 case SMP_RESP_FUNC_ACC:
1800 if (SAS_ADDR(attached_sas_addr) == 0) {
1801 phy->phy_state = PHY_EMPTY;
1802 sas_unregister_devs_sas_addr(dev, phy_id);
1803 } else if (SAS_ADDR(attached_sas_addr) ==
1804 SAS_ADDR(phy->attached_sas_addr)) {
1805 SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter\n",
1806 SAS_ADDR(dev->sas_addr), phy_id);
1807 sas_ex_phy_discover(dev, phy_id);
1809 res = sas_discover_new(dev, phy_id);
1814 static int sas_rediscover(struct domain_device *dev, const int phy_id)
1816 struct expander_device *ex = &dev->ex_dev;
1817 struct ex_phy *changed_phy = &ex->ex_phy[phy_id];
1821 SAS_DPRINTK("ex %016llx phy%d originated BROADCAST(CHANGE)\n",
1822 SAS_ADDR(dev->sas_addr), phy_id);
1824 if (SAS_ADDR(changed_phy->attached_sas_addr) != 0) {
1825 for (i = 0; i < ex->num_phys; i++) {
1826 struct ex_phy *phy = &ex->ex_phy[i];
1830 if (SAS_ADDR(phy->attached_sas_addr) ==
1831 SAS_ADDR(changed_phy->attached_sas_addr)) {
1832 SAS_DPRINTK("phy%d part of wide port with "
1833 "phy%d\n", phy_id, i);
1837 res = sas_rediscover_dev(dev, phy_id);
1839 res = sas_discover_new(dev, phy_id);
1845 * sas_revalidate_domain -- revalidate the domain
1846 * @port: port to the domain of interest
1848 * NOTE: this process _must_ quit (return) as soon as any connection
1849 * errors are encountered. Connection recovery is done elsewhere.
1850 * Discover process only interrogates devices in order to discover the
1853 int sas_ex_revalidate_domain(struct domain_device *port_dev)
1856 struct domain_device *dev = NULL;
1858 res = sas_find_bcast_dev(port_dev, &dev);
1862 struct expander_device *ex = &dev->ex_dev;
1867 res = sas_find_bcast_phy(dev, &phy_id, i);
1870 res = sas_rediscover(dev, phy_id);
1872 } while (i < ex->num_phys);
1878 int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
1879 struct request *req)
1881 struct domain_device *dev;
1882 int ret, type = rphy->identify.device_type;
1883 struct request *rsp = req->next_rq;
1886 printk("%s: space for a smp response is missing\n",
1891 /* seems aic94xx doesn't support */
1893 printk("%s: can we send a smp request to a host?\n",
1898 if (type != SAS_EDGE_EXPANDER_DEVICE &&
1899 type != SAS_FANOUT_EXPANDER_DEVICE) {
1900 printk("%s: can we send a smp request to a device?\n",
1905 dev = sas_find_dev_by_rphy(rphy);
1907 printk("%s: fail to find a domain_device?\n", __FUNCTION__);
1911 /* do we need to support multiple segments? */
1912 if (req->bio->bi_vcnt > 1 || rsp->bio->bi_vcnt > 1) {
1913 printk("%s: multiple segments req %u %u, rsp %u %u\n",
1914 __FUNCTION__, req->bio->bi_vcnt, req->data_len,
1915 rsp->bio->bi_vcnt, rsp->data_len);
1919 ret = smp_execute_task(dev, bio_data(req->bio), req->data_len,
1920 bio_data(rsp->bio), rsp->data_len);