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) {
112 } if (task->task_status.resp == SAS_TASK_COMPLETE &&
113 task->task_status.stat == SAS_DATA_UNDERRUN) {
114 /* no error, but return the number of bytes of
116 res = task->task_status.residual;
118 } if (task->task_status.resp == SAS_TASK_COMPLETE &&
119 task->task_status.stat == SAS_DATA_OVERRUN) {
123 SAS_DPRINTK("%s: task to dev %016llx response: 0x%x "
124 "status 0x%x\n", __func__,
125 SAS_ADDR(dev->sas_addr),
126 task->task_status.resp,
127 task->task_status.stat);
133 BUG_ON(retry == 3 && task != NULL);
140 /* ---------- Allocations ---------- */
142 static inline void *alloc_smp_req(int size)
144 u8 *p = kzalloc(size, GFP_KERNEL);
150 static inline void *alloc_smp_resp(int size)
152 return kzalloc(size, GFP_KERNEL);
155 /* ---------- Expander configuration ---------- */
157 static void sas_set_ex_phy(struct domain_device *dev, int phy_id,
160 struct expander_device *ex = &dev->ex_dev;
161 struct ex_phy *phy = &ex->ex_phy[phy_id];
162 struct smp_resp *resp = disc_resp;
163 struct discover_resp *dr = &resp->disc;
164 struct sas_rphy *rphy = dev->rphy;
165 int rediscover = (phy->phy != NULL);
168 phy->phy = sas_phy_alloc(&rphy->dev, phy_id);
170 /* FIXME: error_handling */
174 switch (resp->result) {
175 case SMP_RESP_PHY_VACANT:
176 phy->phy_state = PHY_VACANT;
179 phy->phy_state = PHY_NOT_PRESENT;
181 case SMP_RESP_FUNC_ACC:
182 phy->phy_state = PHY_EMPTY; /* do not know yet */
186 phy->phy_id = phy_id;
187 phy->attached_dev_type = dr->attached_dev_type;
188 phy->linkrate = dr->linkrate;
189 phy->attached_sata_host = dr->attached_sata_host;
190 phy->attached_sata_dev = dr->attached_sata_dev;
191 phy->attached_sata_ps = dr->attached_sata_ps;
192 phy->attached_iproto = dr->iproto << 1;
193 phy->attached_tproto = dr->tproto << 1;
194 memcpy(phy->attached_sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE);
195 phy->attached_phy_id = dr->attached_phy_id;
196 phy->phy_change_count = dr->change_count;
197 phy->routing_attr = dr->routing_attr;
198 phy->virtual = dr->virtual;
199 phy->last_da_index = -1;
201 phy->phy->identify.initiator_port_protocols = phy->attached_iproto;
202 phy->phy->identify.target_port_protocols = phy->attached_tproto;
203 phy->phy->identify.phy_identifier = phy_id;
204 phy->phy->minimum_linkrate_hw = dr->hmin_linkrate;
205 phy->phy->maximum_linkrate_hw = dr->hmax_linkrate;
206 phy->phy->minimum_linkrate = dr->pmin_linkrate;
207 phy->phy->maximum_linkrate = dr->pmax_linkrate;
208 phy->phy->negotiated_linkrate = phy->linkrate;
211 sas_phy_add(phy->phy);
213 SAS_DPRINTK("ex %016llx phy%02d:%c attached: %016llx\n",
214 SAS_ADDR(dev->sas_addr), phy->phy_id,
215 phy->routing_attr == TABLE_ROUTING ? 'T' :
216 phy->routing_attr == DIRECT_ROUTING ? 'D' :
217 phy->routing_attr == SUBTRACTIVE_ROUTING ? 'S' : '?',
218 SAS_ADDR(phy->attached_sas_addr));
223 #define DISCOVER_REQ_SIZE 16
224 #define DISCOVER_RESP_SIZE 56
226 static int sas_ex_phy_discover_helper(struct domain_device *dev, u8 *disc_req,
227 u8 *disc_resp, int single)
231 disc_req[9] = single;
232 for (i = 1 ; i < 3; i++) {
233 struct discover_resp *dr;
235 res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE,
236 disc_resp, DISCOVER_RESP_SIZE);
239 /* This is detecting a failure to transmit inital
240 * dev to host FIS as described in section G.5 of
242 dr = &((struct smp_resp *)disc_resp)->disc;
243 if (!(dr->attached_dev_type == 0 &&
244 dr->attached_sata_dev))
246 /* In order to generate the dev to host FIS, we
247 * send a link reset to the expander port */
248 sas_smp_phy_control(dev, single, PHY_FUNC_LINK_RESET, NULL);
249 /* Wait for the reset to trigger the negotiation */
252 sas_set_ex_phy(dev, single, disc_resp);
256 static int sas_ex_phy_discover(struct domain_device *dev, int single)
258 struct expander_device *ex = &dev->ex_dev;
263 disc_req = alloc_smp_req(DISCOVER_REQ_SIZE);
267 disc_resp = alloc_smp_req(DISCOVER_RESP_SIZE);
273 disc_req[1] = SMP_DISCOVER;
275 if (0 <= single && single < ex->num_phys) {
276 res = sas_ex_phy_discover_helper(dev, disc_req, disc_resp, single);
280 for (i = 0; i < ex->num_phys; i++) {
281 res = sas_ex_phy_discover_helper(dev, disc_req,
293 static int sas_expander_discover(struct domain_device *dev)
295 struct expander_device *ex = &dev->ex_dev;
298 ex->ex_phy = kzalloc(sizeof(*ex->ex_phy)*ex->num_phys, GFP_KERNEL);
302 res = sas_ex_phy_discover(dev, -1);
313 #define MAX_EXPANDER_PHYS 128
315 static void ex_assign_report_general(struct domain_device *dev,
316 struct smp_resp *resp)
318 struct report_general_resp *rg = &resp->rg;
320 dev->ex_dev.ex_change_count = be16_to_cpu(rg->change_count);
321 dev->ex_dev.max_route_indexes = be16_to_cpu(rg->route_indexes);
322 dev->ex_dev.num_phys = min(rg->num_phys, (u8)MAX_EXPANDER_PHYS);
323 dev->ex_dev.conf_route_table = rg->conf_route_table;
324 dev->ex_dev.configuring = rg->configuring;
325 memcpy(dev->ex_dev.enclosure_logical_id, rg->enclosure_logical_id, 8);
328 #define RG_REQ_SIZE 8
329 #define RG_RESP_SIZE 32
331 static int sas_ex_general(struct domain_device *dev)
334 struct smp_resp *rg_resp;
338 rg_req = alloc_smp_req(RG_REQ_SIZE);
342 rg_resp = alloc_smp_resp(RG_RESP_SIZE);
348 rg_req[1] = SMP_REPORT_GENERAL;
350 for (i = 0; i < 5; i++) {
351 res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp,
355 SAS_DPRINTK("RG to ex %016llx failed:0x%x\n",
356 SAS_ADDR(dev->sas_addr), res);
358 } else if (rg_resp->result != SMP_RESP_FUNC_ACC) {
359 SAS_DPRINTK("RG:ex %016llx returned SMP result:0x%x\n",
360 SAS_ADDR(dev->sas_addr), rg_resp->result);
361 res = rg_resp->result;
365 ex_assign_report_general(dev, rg_resp);
367 if (dev->ex_dev.configuring) {
368 SAS_DPRINTK("RG: ex %llx self-configuring...\n",
369 SAS_ADDR(dev->sas_addr));
370 schedule_timeout_interruptible(5*HZ);
380 static void ex_assign_manuf_info(struct domain_device *dev, void
383 u8 *mi_resp = _mi_resp;
384 struct sas_rphy *rphy = dev->rphy;
385 struct sas_expander_device *edev = rphy_to_expander_device(rphy);
387 memcpy(edev->vendor_id, mi_resp + 12, SAS_EXPANDER_VENDOR_ID_LEN);
388 memcpy(edev->product_id, mi_resp + 20, SAS_EXPANDER_PRODUCT_ID_LEN);
389 memcpy(edev->product_rev, mi_resp + 36,
390 SAS_EXPANDER_PRODUCT_REV_LEN);
392 if (mi_resp[8] & 1) {
393 memcpy(edev->component_vendor_id, mi_resp + 40,
394 SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN);
395 edev->component_id = mi_resp[48] << 8 | mi_resp[49];
396 edev->component_revision_id = mi_resp[50];
400 #define MI_REQ_SIZE 8
401 #define MI_RESP_SIZE 64
403 static int sas_ex_manuf_info(struct domain_device *dev)
409 mi_req = alloc_smp_req(MI_REQ_SIZE);
413 mi_resp = alloc_smp_resp(MI_RESP_SIZE);
419 mi_req[1] = SMP_REPORT_MANUF_INFO;
421 res = smp_execute_task(dev, mi_req, MI_REQ_SIZE, mi_resp,MI_RESP_SIZE);
423 SAS_DPRINTK("MI: ex %016llx failed:0x%x\n",
424 SAS_ADDR(dev->sas_addr), res);
426 } else if (mi_resp[2] != SMP_RESP_FUNC_ACC) {
427 SAS_DPRINTK("MI ex %016llx returned SMP result:0x%x\n",
428 SAS_ADDR(dev->sas_addr), mi_resp[2]);
432 ex_assign_manuf_info(dev, mi_resp);
439 #define PC_REQ_SIZE 44
440 #define PC_RESP_SIZE 8
442 int sas_smp_phy_control(struct domain_device *dev, int phy_id,
443 enum phy_func phy_func,
444 struct sas_phy_linkrates *rates)
450 pc_req = alloc_smp_req(PC_REQ_SIZE);
454 pc_resp = alloc_smp_resp(PC_RESP_SIZE);
460 pc_req[1] = SMP_PHY_CONTROL;
462 pc_req[10]= phy_func;
464 pc_req[32] = rates->minimum_linkrate << 4;
465 pc_req[33] = rates->maximum_linkrate << 4;
468 res = smp_execute_task(dev, pc_req, PC_REQ_SIZE, pc_resp,PC_RESP_SIZE);
475 static void sas_ex_disable_phy(struct domain_device *dev, int phy_id)
477 struct expander_device *ex = &dev->ex_dev;
478 struct ex_phy *phy = &ex->ex_phy[phy_id];
480 sas_smp_phy_control(dev, phy_id, PHY_FUNC_DISABLE, NULL);
481 phy->linkrate = SAS_PHY_DISABLED;
484 static void sas_ex_disable_port(struct domain_device *dev, u8 *sas_addr)
486 struct expander_device *ex = &dev->ex_dev;
489 for (i = 0; i < ex->num_phys; i++) {
490 struct ex_phy *phy = &ex->ex_phy[i];
492 if (phy->phy_state == PHY_VACANT ||
493 phy->phy_state == PHY_NOT_PRESENT)
496 if (SAS_ADDR(phy->attached_sas_addr) == SAS_ADDR(sas_addr))
497 sas_ex_disable_phy(dev, i);
501 static int sas_dev_present_in_domain(struct asd_sas_port *port,
504 struct domain_device *dev;
506 if (SAS_ADDR(port->sas_addr) == SAS_ADDR(sas_addr))
508 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
509 if (SAS_ADDR(dev->sas_addr) == SAS_ADDR(sas_addr))
515 #define RPEL_REQ_SIZE 16
516 #define RPEL_RESP_SIZE 32
517 int sas_smp_get_phy_events(struct sas_phy *phy)
522 struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent);
523 struct domain_device *dev = sas_find_dev_by_rphy(rphy);
525 req = alloc_smp_req(RPEL_REQ_SIZE);
529 resp = alloc_smp_resp(RPEL_RESP_SIZE);
535 req[1] = SMP_REPORT_PHY_ERR_LOG;
536 req[9] = phy->number;
538 res = smp_execute_task(dev, req, RPEL_REQ_SIZE,
539 resp, RPEL_RESP_SIZE);
544 phy->invalid_dword_count = scsi_to_u32(&resp[12]);
545 phy->running_disparity_error_count = scsi_to_u32(&resp[16]);
546 phy->loss_of_dword_sync_count = scsi_to_u32(&resp[20]);
547 phy->phy_reset_problem_count = scsi_to_u32(&resp[24]);
555 #ifdef CONFIG_SCSI_SAS_ATA
557 #define RPS_REQ_SIZE 16
558 #define RPS_RESP_SIZE 60
560 static int sas_get_report_phy_sata(struct domain_device *dev,
562 struct smp_resp *rps_resp)
565 u8 *rps_req = alloc_smp_req(RPS_REQ_SIZE);
566 u8 *resp = (u8 *)rps_resp;
571 rps_req[1] = SMP_REPORT_PHY_SATA;
574 res = smp_execute_task(dev, rps_req, RPS_REQ_SIZE,
575 rps_resp, RPS_RESP_SIZE);
577 /* 0x34 is the FIS type for the D2H fis. There's a potential
578 * standards cockup here. sas-2 explicitly specifies the FIS
579 * should be encoded so that FIS type is in resp[24].
580 * However, some expanders endian reverse this. Undo the
582 if (!res && resp[27] == 0x34 && resp[24] != 0x34) {
585 for (i = 0; i < 5; i++) {
590 resp[j + 0] = resp[j + 3];
591 resp[j + 1] = resp[j + 2];
602 static void sas_ex_get_linkrate(struct domain_device *parent,
603 struct domain_device *child,
604 struct ex_phy *parent_phy)
606 struct expander_device *parent_ex = &parent->ex_dev;
607 struct sas_port *port;
612 port = parent_phy->port;
614 for (i = 0; i < parent_ex->num_phys; i++) {
615 struct ex_phy *phy = &parent_ex->ex_phy[i];
617 if (phy->phy_state == PHY_VACANT ||
618 phy->phy_state == PHY_NOT_PRESENT)
621 if (SAS_ADDR(phy->attached_sas_addr) ==
622 SAS_ADDR(child->sas_addr)) {
624 child->min_linkrate = min(parent->min_linkrate,
626 child->max_linkrate = max(parent->max_linkrate,
629 sas_port_add_phy(port, phy->phy);
632 child->linkrate = min(parent_phy->linkrate, child->max_linkrate);
633 child->pathways = min(child->pathways, parent->pathways);
636 static struct domain_device *sas_ex_discover_end_dev(
637 struct domain_device *parent, int phy_id)
639 struct expander_device *parent_ex = &parent->ex_dev;
640 struct ex_phy *phy = &parent_ex->ex_phy[phy_id];
641 struct domain_device *child = NULL;
642 struct sas_rphy *rphy;
645 if (phy->attached_sata_host || phy->attached_sata_ps)
648 child = kzalloc(sizeof(*child), GFP_KERNEL);
652 child->parent = parent;
653 child->port = parent->port;
654 child->iproto = phy->attached_iproto;
655 memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
656 sas_hash_addr(child->hashed_sas_addr, child->sas_addr);
658 phy->port = sas_port_alloc(&parent->rphy->dev, phy_id);
659 if (unlikely(!phy->port))
661 if (unlikely(sas_port_add(phy->port) != 0)) {
662 sas_port_free(phy->port);
666 sas_ex_get_linkrate(parent, child, phy);
668 #ifdef CONFIG_SCSI_SAS_ATA
669 if ((phy->attached_tproto & SAS_PROTOCOL_STP) || phy->attached_sata_dev) {
670 child->dev_type = SATA_DEV;
671 if (phy->attached_tproto & SAS_PROTOCOL_STP)
672 child->tproto = phy->attached_tproto;
673 if (phy->attached_sata_dev)
674 child->tproto |= SATA_DEV;
675 res = sas_get_report_phy_sata(parent, phy_id,
676 &child->sata_dev.rps_resp);
678 SAS_DPRINTK("report phy sata to %016llx:0x%x returned "
679 "0x%x\n", SAS_ADDR(parent->sas_addr),
683 memcpy(child->frame_rcvd, &child->sata_dev.rps_resp.rps.fis,
684 sizeof(struct dev_to_host_fis));
686 rphy = sas_end_device_alloc(phy->port);
694 spin_lock_irq(&parent->port->dev_list_lock);
695 list_add_tail(&child->dev_list_node, &parent->port->dev_list);
696 spin_unlock_irq(&parent->port->dev_list_lock);
698 res = sas_discover_sata(child);
700 SAS_DPRINTK("sas_discover_sata() for device %16llx at "
701 "%016llx:0x%x returned 0x%x\n",
702 SAS_ADDR(child->sas_addr),
703 SAS_ADDR(parent->sas_addr), phy_id, res);
708 if (phy->attached_tproto & SAS_PROTOCOL_SSP) {
709 child->dev_type = SAS_END_DEV;
710 rphy = sas_end_device_alloc(phy->port);
711 /* FIXME: error handling */
714 child->tproto = phy->attached_tproto;
718 sas_fill_in_rphy(child, rphy);
720 spin_lock_irq(&parent->port->dev_list_lock);
721 list_add_tail(&child->dev_list_node, &parent->port->dev_list);
722 spin_unlock_irq(&parent->port->dev_list_lock);
724 res = sas_discover_end_dev(child);
726 SAS_DPRINTK("sas_discover_end_dev() for device %16llx "
727 "at %016llx:0x%x returned 0x%x\n",
728 SAS_ADDR(child->sas_addr),
729 SAS_ADDR(parent->sas_addr), phy_id, res);
733 SAS_DPRINTK("target proto 0x%x at %016llx:0x%x not handled\n",
734 phy->attached_tproto, SAS_ADDR(parent->sas_addr),
739 list_add_tail(&child->siblings, &parent_ex->children);
743 sas_rphy_free(child->rphy);
745 list_del(&child->dev_list_node);
747 sas_port_delete(phy->port);
754 /* See if this phy is part of a wide port */
755 static int sas_ex_join_wide_port(struct domain_device *parent, int phy_id)
757 struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id];
760 for (i = 0; i < parent->ex_dev.num_phys; i++) {
761 struct ex_phy *ephy = &parent->ex_dev.ex_phy[i];
766 if (!memcmp(phy->attached_sas_addr, ephy->attached_sas_addr,
767 SAS_ADDR_SIZE) && ephy->port) {
768 sas_port_add_phy(ephy->port, phy->phy);
769 phy->port = ephy->port;
770 phy->phy_state = PHY_DEVICE_DISCOVERED;
778 static struct domain_device *sas_ex_discover_expander(
779 struct domain_device *parent, int phy_id)
781 struct sas_expander_device *parent_ex = rphy_to_expander_device(parent->rphy);
782 struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id];
783 struct domain_device *child = NULL;
784 struct sas_rphy *rphy;
785 struct sas_expander_device *edev;
786 struct asd_sas_port *port;
789 if (phy->routing_attr == DIRECT_ROUTING) {
790 SAS_DPRINTK("ex %016llx:0x%x:D <--> ex %016llx:0x%x is not "
792 SAS_ADDR(parent->sas_addr), phy_id,
793 SAS_ADDR(phy->attached_sas_addr),
794 phy->attached_phy_id);
797 child = kzalloc(sizeof(*child), GFP_KERNEL);
801 phy->port = sas_port_alloc(&parent->rphy->dev, phy_id);
802 /* FIXME: better error handling */
803 BUG_ON(sas_port_add(phy->port) != 0);
806 switch (phy->attached_dev_type) {
808 rphy = sas_expander_alloc(phy->port,
809 SAS_EDGE_EXPANDER_DEVICE);
812 rphy = sas_expander_alloc(phy->port,
813 SAS_FANOUT_EXPANDER_DEVICE);
816 rphy = NULL; /* shut gcc up */
821 edev = rphy_to_expander_device(rphy);
822 child->dev_type = phy->attached_dev_type;
823 child->parent = parent;
825 child->iproto = phy->attached_iproto;
826 child->tproto = phy->attached_tproto;
827 memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
828 sas_hash_addr(child->hashed_sas_addr, child->sas_addr);
829 sas_ex_get_linkrate(parent, child, phy);
830 edev->level = parent_ex->level + 1;
831 parent->port->disc.max_level = max(parent->port->disc.max_level,
834 sas_fill_in_rphy(child, rphy);
837 spin_lock_irq(&parent->port->dev_list_lock);
838 list_add_tail(&child->dev_list_node, &parent->port->dev_list);
839 spin_unlock_irq(&parent->port->dev_list_lock);
841 res = sas_discover_expander(child);
843 spin_lock_irq(&parent->port->dev_list_lock);
844 list_del(&child->dev_list_node);
845 spin_unlock_irq(&parent->port->dev_list_lock);
849 list_add_tail(&child->siblings, &parent->ex_dev.children);
853 static int sas_ex_discover_dev(struct domain_device *dev, int phy_id)
855 struct expander_device *ex = &dev->ex_dev;
856 struct ex_phy *ex_phy = &ex->ex_phy[phy_id];
857 struct domain_device *child = NULL;
861 if (ex_phy->linkrate == SAS_SATA_SPINUP_HOLD) {
862 if (!sas_smp_phy_control(dev, phy_id, PHY_FUNC_LINK_RESET, NULL))
863 res = sas_ex_phy_discover(dev, phy_id);
868 /* Parent and domain coherency */
869 if (!dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) ==
870 SAS_ADDR(dev->port->sas_addr))) {
871 sas_add_parent_port(dev, phy_id);
874 if (dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) ==
875 SAS_ADDR(dev->parent->sas_addr))) {
876 sas_add_parent_port(dev, phy_id);
877 if (ex_phy->routing_attr == TABLE_ROUTING)
878 sas_configure_phy(dev, phy_id, dev->port->sas_addr, 1);
882 if (sas_dev_present_in_domain(dev->port, ex_phy->attached_sas_addr))
883 sas_ex_disable_port(dev, ex_phy->attached_sas_addr);
885 if (ex_phy->attached_dev_type == NO_DEVICE) {
886 if (ex_phy->routing_attr == DIRECT_ROUTING) {
887 memset(ex_phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
888 sas_configure_routing(dev, ex_phy->attached_sas_addr);
891 } else if (ex_phy->linkrate == SAS_LINK_RATE_UNKNOWN)
894 if (ex_phy->attached_dev_type != SAS_END_DEV &&
895 ex_phy->attached_dev_type != FANOUT_DEV &&
896 ex_phy->attached_dev_type != EDGE_DEV) {
897 SAS_DPRINTK("unknown device type(0x%x) attached to ex %016llx "
898 "phy 0x%x\n", ex_phy->attached_dev_type,
899 SAS_ADDR(dev->sas_addr),
904 res = sas_configure_routing(dev, ex_phy->attached_sas_addr);
906 SAS_DPRINTK("configure routing for dev %016llx "
907 "reported 0x%x. Forgotten\n",
908 SAS_ADDR(ex_phy->attached_sas_addr), res);
909 sas_disable_routing(dev, ex_phy->attached_sas_addr);
913 res = sas_ex_join_wide_port(dev, phy_id);
915 SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n",
916 phy_id, SAS_ADDR(ex_phy->attached_sas_addr));
920 switch (ex_phy->attached_dev_type) {
922 child = sas_ex_discover_end_dev(dev, phy_id);
925 if (SAS_ADDR(dev->port->disc.fanout_sas_addr)) {
926 SAS_DPRINTK("second fanout expander %016llx phy 0x%x "
927 "attached to ex %016llx phy 0x%x\n",
928 SAS_ADDR(ex_phy->attached_sas_addr),
929 ex_phy->attached_phy_id,
930 SAS_ADDR(dev->sas_addr),
932 sas_ex_disable_phy(dev, phy_id);
935 memcpy(dev->port->disc.fanout_sas_addr,
936 ex_phy->attached_sas_addr, SAS_ADDR_SIZE);
939 child = sas_ex_discover_expander(dev, phy_id);
948 for (i = 0; i < ex->num_phys; i++) {
949 if (ex->ex_phy[i].phy_state == PHY_VACANT ||
950 ex->ex_phy[i].phy_state == PHY_NOT_PRESENT)
953 * Due to races, the phy might not get added to the
954 * wide port, so we add the phy to the wide port here.
956 if (SAS_ADDR(ex->ex_phy[i].attached_sas_addr) ==
957 SAS_ADDR(child->sas_addr)) {
958 ex->ex_phy[i].phy_state= PHY_DEVICE_DISCOVERED;
959 res = sas_ex_join_wide_port(dev, i);
961 SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n",
962 i, SAS_ADDR(ex->ex_phy[i].attached_sas_addr));
971 static int sas_find_sub_addr(struct domain_device *dev, u8 *sub_addr)
973 struct expander_device *ex = &dev->ex_dev;
976 for (i = 0; i < ex->num_phys; i++) {
977 struct ex_phy *phy = &ex->ex_phy[i];
979 if (phy->phy_state == PHY_VACANT ||
980 phy->phy_state == PHY_NOT_PRESENT)
983 if ((phy->attached_dev_type == EDGE_DEV ||
984 phy->attached_dev_type == FANOUT_DEV) &&
985 phy->routing_attr == SUBTRACTIVE_ROUTING) {
987 memcpy(sub_addr, phy->attached_sas_addr,SAS_ADDR_SIZE);
995 static int sas_check_level_subtractive_boundary(struct domain_device *dev)
997 struct expander_device *ex = &dev->ex_dev;
998 struct domain_device *child;
999 u8 sub_addr[8] = {0, };
1001 list_for_each_entry(child, &ex->children, siblings) {
1002 if (child->dev_type != EDGE_DEV &&
1003 child->dev_type != FANOUT_DEV)
1005 if (sub_addr[0] == 0) {
1006 sas_find_sub_addr(child, sub_addr);
1011 if (sas_find_sub_addr(child, s2) &&
1012 (SAS_ADDR(sub_addr) != SAS_ADDR(s2))) {
1014 SAS_DPRINTK("ex %016llx->%016llx-?->%016llx "
1015 "diverges from subtractive "
1016 "boundary %016llx\n",
1017 SAS_ADDR(dev->sas_addr),
1018 SAS_ADDR(child->sas_addr),
1020 SAS_ADDR(sub_addr));
1022 sas_ex_disable_port(child, s2);
1029 * sas_ex_discover_devices -- discover devices attached to this expander
1030 * dev: pointer to the expander domain device
1031 * single: if you want to do a single phy, else set to -1;
1033 * Configure this expander for use with its devices and register the
1034 * devices of this expander.
1036 static int sas_ex_discover_devices(struct domain_device *dev, int single)
1038 struct expander_device *ex = &dev->ex_dev;
1039 int i = 0, end = ex->num_phys;
1042 if (0 <= single && single < end) {
1047 for ( ; i < end; i++) {
1048 struct ex_phy *ex_phy = &ex->ex_phy[i];
1050 if (ex_phy->phy_state == PHY_VACANT ||
1051 ex_phy->phy_state == PHY_NOT_PRESENT ||
1052 ex_phy->phy_state == PHY_DEVICE_DISCOVERED)
1055 switch (ex_phy->linkrate) {
1056 case SAS_PHY_DISABLED:
1057 case SAS_PHY_RESET_PROBLEM:
1058 case SAS_SATA_PORT_SELECTOR:
1061 res = sas_ex_discover_dev(dev, i);
1069 sas_check_level_subtractive_boundary(dev);
1074 static int sas_check_ex_subtractive_boundary(struct domain_device *dev)
1076 struct expander_device *ex = &dev->ex_dev;
1078 u8 *sub_sas_addr = NULL;
1080 if (dev->dev_type != EDGE_DEV)
1083 for (i = 0; i < ex->num_phys; i++) {
1084 struct ex_phy *phy = &ex->ex_phy[i];
1086 if (phy->phy_state == PHY_VACANT ||
1087 phy->phy_state == PHY_NOT_PRESENT)
1090 if ((phy->attached_dev_type == FANOUT_DEV ||
1091 phy->attached_dev_type == EDGE_DEV) &&
1092 phy->routing_attr == SUBTRACTIVE_ROUTING) {
1095 sub_sas_addr = &phy->attached_sas_addr[0];
1096 else if (SAS_ADDR(sub_sas_addr) !=
1097 SAS_ADDR(phy->attached_sas_addr)) {
1099 SAS_DPRINTK("ex %016llx phy 0x%x "
1100 "diverges(%016llx) on subtractive "
1101 "boundary(%016llx). Disabled\n",
1102 SAS_ADDR(dev->sas_addr), i,
1103 SAS_ADDR(phy->attached_sas_addr),
1104 SAS_ADDR(sub_sas_addr));
1105 sas_ex_disable_phy(dev, i);
1112 static void sas_print_parent_topology_bug(struct domain_device *child,
1113 struct ex_phy *parent_phy,
1114 struct ex_phy *child_phy)
1116 static const char ra_char[] = {
1117 [DIRECT_ROUTING] = 'D',
1118 [SUBTRACTIVE_ROUTING] = 'S',
1119 [TABLE_ROUTING] = 'T',
1121 static const char *ex_type[] = {
1122 [EDGE_DEV] = "edge",
1123 [FANOUT_DEV] = "fanout",
1125 struct domain_device *parent = child->parent;
1127 sas_printk("%s ex %016llx phy 0x%x <--> %s ex %016llx phy 0x%x "
1128 "has %c:%c routing link!\n",
1130 ex_type[parent->dev_type],
1131 SAS_ADDR(parent->sas_addr),
1134 ex_type[child->dev_type],
1135 SAS_ADDR(child->sas_addr),
1138 ra_char[parent_phy->routing_attr],
1139 ra_char[child_phy->routing_attr]);
1142 static int sas_check_eeds(struct domain_device *child,
1143 struct ex_phy *parent_phy,
1144 struct ex_phy *child_phy)
1147 struct domain_device *parent = child->parent;
1149 if (SAS_ADDR(parent->port->disc.fanout_sas_addr) != 0) {
1151 SAS_DPRINTK("edge ex %016llx phy S:0x%x <--> edge ex %016llx "
1152 "phy S:0x%x, while there is a fanout ex %016llx\n",
1153 SAS_ADDR(parent->sas_addr),
1155 SAS_ADDR(child->sas_addr),
1157 SAS_ADDR(parent->port->disc.fanout_sas_addr));
1158 } else if (SAS_ADDR(parent->port->disc.eeds_a) == 0) {
1159 memcpy(parent->port->disc.eeds_a, parent->sas_addr,
1161 memcpy(parent->port->disc.eeds_b, child->sas_addr,
1163 } else if (((SAS_ADDR(parent->port->disc.eeds_a) ==
1164 SAS_ADDR(parent->sas_addr)) ||
1165 (SAS_ADDR(parent->port->disc.eeds_a) ==
1166 SAS_ADDR(child->sas_addr)))
1168 ((SAS_ADDR(parent->port->disc.eeds_b) ==
1169 SAS_ADDR(parent->sas_addr)) ||
1170 (SAS_ADDR(parent->port->disc.eeds_b) ==
1171 SAS_ADDR(child->sas_addr))))
1175 SAS_DPRINTK("edge ex %016llx phy 0x%x <--> edge ex %016llx "
1176 "phy 0x%x link forms a third EEDS!\n",
1177 SAS_ADDR(parent->sas_addr),
1179 SAS_ADDR(child->sas_addr),
1186 /* Here we spill over 80 columns. It is intentional.
1188 static int sas_check_parent_topology(struct domain_device *child)
1190 struct expander_device *child_ex = &child->ex_dev;
1191 struct expander_device *parent_ex;
1198 if (child->parent->dev_type != EDGE_DEV &&
1199 child->parent->dev_type != FANOUT_DEV)
1202 parent_ex = &child->parent->ex_dev;
1204 for (i = 0; i < parent_ex->num_phys; i++) {
1205 struct ex_phy *parent_phy = &parent_ex->ex_phy[i];
1206 struct ex_phy *child_phy;
1208 if (parent_phy->phy_state == PHY_VACANT ||
1209 parent_phy->phy_state == PHY_NOT_PRESENT)
1212 if (SAS_ADDR(parent_phy->attached_sas_addr) != SAS_ADDR(child->sas_addr))
1215 child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id];
1217 switch (child->parent->dev_type) {
1219 if (child->dev_type == FANOUT_DEV) {
1220 if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING ||
1221 child_phy->routing_attr != TABLE_ROUTING) {
1222 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1225 } else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) {
1226 if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) {
1227 res = sas_check_eeds(child, parent_phy, child_phy);
1228 } else if (child_phy->routing_attr != TABLE_ROUTING) {
1229 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1232 } else if (parent_phy->routing_attr == TABLE_ROUTING &&
1233 child_phy->routing_attr != SUBTRACTIVE_ROUTING) {
1234 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1239 if (parent_phy->routing_attr != TABLE_ROUTING ||
1240 child_phy->routing_attr != SUBTRACTIVE_ROUTING) {
1241 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1253 #define RRI_REQ_SIZE 16
1254 #define RRI_RESP_SIZE 44
1256 static int sas_configure_present(struct domain_device *dev, int phy_id,
1257 u8 *sas_addr, int *index, int *present)
1260 struct expander_device *ex = &dev->ex_dev;
1261 struct ex_phy *phy = &ex->ex_phy[phy_id];
1268 rri_req = alloc_smp_req(RRI_REQ_SIZE);
1272 rri_resp = alloc_smp_resp(RRI_RESP_SIZE);
1278 rri_req[1] = SMP_REPORT_ROUTE_INFO;
1279 rri_req[9] = phy_id;
1281 for (i = 0; i < ex->max_route_indexes ; i++) {
1282 *(__be16 *)(rri_req+6) = cpu_to_be16(i);
1283 res = smp_execute_task(dev, rri_req, RRI_REQ_SIZE, rri_resp,
1288 if (res == SMP_RESP_NO_INDEX) {
1289 SAS_DPRINTK("overflow of indexes: dev %016llx "
1290 "phy 0x%x index 0x%x\n",
1291 SAS_ADDR(dev->sas_addr), phy_id, i);
1293 } else if (res != SMP_RESP_FUNC_ACC) {
1294 SAS_DPRINTK("%s: dev %016llx phy 0x%x index 0x%x "
1295 "result 0x%x\n", __func__,
1296 SAS_ADDR(dev->sas_addr), phy_id, i, res);
1299 if (SAS_ADDR(sas_addr) != 0) {
1300 if (SAS_ADDR(rri_resp+16) == SAS_ADDR(sas_addr)) {
1302 if ((rri_resp[12] & 0x80) == 0x80)
1307 } else if (SAS_ADDR(rri_resp+16) == 0) {
1312 } else if (SAS_ADDR(rri_resp+16) == 0 &&
1313 phy->last_da_index < i) {
1314 phy->last_da_index = i;
1327 #define CRI_REQ_SIZE 44
1328 #define CRI_RESP_SIZE 8
1330 static int sas_configure_set(struct domain_device *dev, int phy_id,
1331 u8 *sas_addr, int index, int include)
1337 cri_req = alloc_smp_req(CRI_REQ_SIZE);
1341 cri_resp = alloc_smp_resp(CRI_RESP_SIZE);
1347 cri_req[1] = SMP_CONF_ROUTE_INFO;
1348 *(__be16 *)(cri_req+6) = cpu_to_be16(index);
1349 cri_req[9] = phy_id;
1350 if (SAS_ADDR(sas_addr) == 0 || !include)
1351 cri_req[12] |= 0x80;
1352 memcpy(cri_req+16, sas_addr, SAS_ADDR_SIZE);
1354 res = smp_execute_task(dev, cri_req, CRI_REQ_SIZE, cri_resp,
1359 if (res == SMP_RESP_NO_INDEX) {
1360 SAS_DPRINTK("overflow of indexes: dev %016llx phy 0x%x "
1362 SAS_ADDR(dev->sas_addr), phy_id, index);
1370 static int sas_configure_phy(struct domain_device *dev, int phy_id,
1371 u8 *sas_addr, int include)
1377 res = sas_configure_present(dev, phy_id, sas_addr, &index, &present);
1380 if (include ^ present)
1381 return sas_configure_set(dev, phy_id, sas_addr, index,include);
1387 * sas_configure_parent -- configure routing table of parent
1388 * parent: parent expander
1389 * child: child expander
1390 * sas_addr: SAS port identifier of device directly attached to child
1392 static int sas_configure_parent(struct domain_device *parent,
1393 struct domain_device *child,
1394 u8 *sas_addr, int include)
1396 struct expander_device *ex_parent = &parent->ex_dev;
1400 if (parent->parent) {
1401 res = sas_configure_parent(parent->parent, parent, sas_addr,
1407 if (ex_parent->conf_route_table == 0) {
1408 SAS_DPRINTK("ex %016llx has self-configuring routing table\n",
1409 SAS_ADDR(parent->sas_addr));
1413 for (i = 0; i < ex_parent->num_phys; i++) {
1414 struct ex_phy *phy = &ex_parent->ex_phy[i];
1416 if ((phy->routing_attr == TABLE_ROUTING) &&
1417 (SAS_ADDR(phy->attached_sas_addr) ==
1418 SAS_ADDR(child->sas_addr))) {
1419 res = sas_configure_phy(parent, i, sas_addr, include);
1429 * sas_configure_routing -- configure routing
1430 * dev: expander device
1431 * sas_addr: port identifier of device directly attached to the expander device
1433 static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr)
1436 return sas_configure_parent(dev->parent, dev, sas_addr, 1);
1440 static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr)
1443 return sas_configure_parent(dev->parent, dev, sas_addr, 0);
1448 * sas_discover_expander -- expander discovery
1449 * @ex: pointer to expander domain device
1451 * See comment in sas_discover_sata().
1453 static int sas_discover_expander(struct domain_device *dev)
1457 res = sas_notify_lldd_dev_found(dev);
1461 res = sas_ex_general(dev);
1464 res = sas_ex_manuf_info(dev);
1468 res = sas_expander_discover(dev);
1470 SAS_DPRINTK("expander %016llx discovery failed(0x%x)\n",
1471 SAS_ADDR(dev->sas_addr), res);
1475 sas_check_ex_subtractive_boundary(dev);
1476 res = sas_check_parent_topology(dev);
1481 sas_notify_lldd_dev_gone(dev);
1485 static int sas_ex_level_discovery(struct asd_sas_port *port, const int level)
1488 struct domain_device *dev;
1490 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
1491 if (dev->dev_type == EDGE_DEV ||
1492 dev->dev_type == FANOUT_DEV) {
1493 struct sas_expander_device *ex =
1494 rphy_to_expander_device(dev->rphy);
1496 if (level == ex->level)
1497 res = sas_ex_discover_devices(dev, -1);
1499 res = sas_ex_discover_devices(port->port_dev, -1);
1507 static int sas_ex_bfs_disc(struct asd_sas_port *port)
1513 level = port->disc.max_level;
1514 res = sas_ex_level_discovery(port, level);
1516 } while (level < port->disc.max_level);
1521 int sas_discover_root_expander(struct domain_device *dev)
1524 struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy);
1526 res = sas_rphy_add(dev->rphy);
1530 ex->level = dev->port->disc.max_level; /* 0 */
1531 res = sas_discover_expander(dev);
1535 sas_ex_bfs_disc(dev->port);
1540 sas_rphy_remove(dev->rphy);
1545 /* ---------- Domain revalidation ---------- */
1547 static int sas_get_phy_discover(struct domain_device *dev,
1548 int phy_id, struct smp_resp *disc_resp)
1553 disc_req = alloc_smp_req(DISCOVER_REQ_SIZE);
1557 disc_req[1] = SMP_DISCOVER;
1558 disc_req[9] = phy_id;
1560 res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE,
1561 disc_resp, DISCOVER_RESP_SIZE);
1564 else if (disc_resp->result != SMP_RESP_FUNC_ACC) {
1565 res = disc_resp->result;
1573 static int sas_get_phy_change_count(struct domain_device *dev,
1574 int phy_id, int *pcc)
1577 struct smp_resp *disc_resp;
1579 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
1583 res = sas_get_phy_discover(dev, phy_id, disc_resp);
1585 *pcc = disc_resp->disc.change_count;
1591 static int sas_get_phy_attached_sas_addr(struct domain_device *dev,
1592 int phy_id, u8 *attached_sas_addr)
1595 struct smp_resp *disc_resp;
1596 struct discover_resp *dr;
1598 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
1601 dr = &disc_resp->disc;
1603 res = sas_get_phy_discover(dev, phy_id, disc_resp);
1605 memcpy(attached_sas_addr,disc_resp->disc.attached_sas_addr,8);
1606 if (dr->attached_dev_type == 0)
1607 memset(attached_sas_addr, 0, 8);
1613 static int sas_find_bcast_phy(struct domain_device *dev, int *phy_id,
1614 int from_phy, bool update)
1616 struct expander_device *ex = &dev->ex_dev;
1620 for (i = from_phy; i < ex->num_phys; i++) {
1621 int phy_change_count = 0;
1623 res = sas_get_phy_change_count(dev, i, &phy_change_count);
1626 else if (phy_change_count != ex->ex_phy[i].phy_change_count) {
1628 ex->ex_phy[i].phy_change_count =
1638 static int sas_get_ex_change_count(struct domain_device *dev, int *ecc)
1642 struct smp_resp *rg_resp;
1644 rg_req = alloc_smp_req(RG_REQ_SIZE);
1648 rg_resp = alloc_smp_resp(RG_RESP_SIZE);
1654 rg_req[1] = SMP_REPORT_GENERAL;
1656 res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp,
1660 if (rg_resp->result != SMP_RESP_FUNC_ACC) {
1661 res = rg_resp->result;
1665 *ecc = be16_to_cpu(rg_resp->rg.change_count);
1672 * sas_find_bcast_dev - find the device issue BROADCAST(CHANGE).
1673 * @dev:domain device to be detect.
1674 * @src_dev: the device which originated BROADCAST(CHANGE).
1676 * Add self-configuration expander suport. Suppose two expander cascading,
1677 * when the first level expander is self-configuring, hotplug the disks in
1678 * second level expander, BROADCAST(CHANGE) will not only be originated
1679 * in the second level expander, but also be originated in the first level
1680 * expander (see SAS protocol SAS 2r-14, 7.11 for detail), it is to say,
1681 * expander changed count in two level expanders will all increment at least
1682 * once, but the phy which chang count has changed is the source device which
1686 static int sas_find_bcast_dev(struct domain_device *dev,
1687 struct domain_device **src_dev)
1689 struct expander_device *ex = &dev->ex_dev;
1690 int ex_change_count = -1;
1693 struct domain_device *ch;
1695 res = sas_get_ex_change_count(dev, &ex_change_count);
1698 if (ex_change_count != -1 && ex_change_count != ex->ex_change_count) {
1699 /* Just detect if this expander phys phy change count changed,
1700 * in order to determine if this expander originate BROADCAST,
1701 * and do not update phy change count field in our structure.
1703 res = sas_find_bcast_phy(dev, &phy_id, 0, false);
1706 ex->ex_change_count = ex_change_count;
1707 SAS_DPRINTK("Expander phy change count has changed\n");
1710 SAS_DPRINTK("Expander phys DID NOT change\n");
1712 list_for_each_entry(ch, &ex->children, siblings) {
1713 if (ch->dev_type == EDGE_DEV || ch->dev_type == FANOUT_DEV) {
1714 res = sas_find_bcast_dev(ch, src_dev);
1723 static void sas_unregister_ex_tree(struct domain_device *dev)
1725 struct expander_device *ex = &dev->ex_dev;
1726 struct domain_device *child, *n;
1728 list_for_each_entry_safe(child, n, &ex->children, siblings) {
1729 if (child->dev_type == EDGE_DEV ||
1730 child->dev_type == FANOUT_DEV)
1731 sas_unregister_ex_tree(child);
1733 sas_unregister_dev(child);
1735 sas_unregister_dev(dev);
1738 static void sas_unregister_devs_sas_addr(struct domain_device *parent,
1739 int phy_id, bool last)
1741 struct expander_device *ex_dev = &parent->ex_dev;
1742 struct ex_phy *phy = &ex_dev->ex_phy[phy_id];
1743 struct domain_device *child, *n;
1745 list_for_each_entry_safe(child, n,
1746 &ex_dev->children, siblings) {
1747 if (SAS_ADDR(child->sas_addr) ==
1748 SAS_ADDR(phy->attached_sas_addr)) {
1749 if (child->dev_type == EDGE_DEV ||
1750 child->dev_type == FANOUT_DEV)
1751 sas_unregister_ex_tree(child);
1753 sas_unregister_dev(child);
1757 sas_disable_routing(parent, phy->attached_sas_addr);
1759 memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
1760 sas_port_delete_phy(phy->port, phy->phy);
1761 if (phy->port->num_phys == 0)
1762 sas_port_delete(phy->port);
1766 static int sas_discover_bfs_by_root_level(struct domain_device *root,
1769 struct expander_device *ex_root = &root->ex_dev;
1770 struct domain_device *child;
1773 list_for_each_entry(child, &ex_root->children, siblings) {
1774 if (child->dev_type == EDGE_DEV ||
1775 child->dev_type == FANOUT_DEV) {
1776 struct sas_expander_device *ex =
1777 rphy_to_expander_device(child->rphy);
1779 if (level > ex->level)
1780 res = sas_discover_bfs_by_root_level(child,
1782 else if (level == ex->level)
1783 res = sas_ex_discover_devices(child, -1);
1789 static int sas_discover_bfs_by_root(struct domain_device *dev)
1792 struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy);
1793 int level = ex->level+1;
1795 res = sas_ex_discover_devices(dev, -1);
1799 res = sas_discover_bfs_by_root_level(dev, level);
1802 } while (level <= dev->port->disc.max_level);
1807 static int sas_discover_new(struct domain_device *dev, int phy_id)
1809 struct ex_phy *ex_phy = &dev->ex_dev.ex_phy[phy_id];
1810 struct domain_device *child;
1814 SAS_DPRINTK("ex %016llx phy%d new device attached\n",
1815 SAS_ADDR(dev->sas_addr), phy_id);
1816 res = sas_ex_phy_discover(dev, phy_id);
1819 /* to support the wide port inserted */
1820 for (i = 0; i < dev->ex_dev.num_phys; i++) {
1821 struct ex_phy *ex_phy_temp = &dev->ex_dev.ex_phy[i];
1824 if (SAS_ADDR(ex_phy_temp->attached_sas_addr) ==
1825 SAS_ADDR(ex_phy->attached_sas_addr)) {
1831 sas_ex_join_wide_port(dev, phy_id);
1834 res = sas_ex_discover_devices(dev, phy_id);
1837 list_for_each_entry(child, &dev->ex_dev.children, siblings) {
1838 if (SAS_ADDR(child->sas_addr) ==
1839 SAS_ADDR(ex_phy->attached_sas_addr)) {
1840 if (child->dev_type == EDGE_DEV ||
1841 child->dev_type == FANOUT_DEV)
1842 res = sas_discover_bfs_by_root(child);
1850 static int sas_rediscover_dev(struct domain_device *dev, int phy_id, bool last)
1852 struct expander_device *ex = &dev->ex_dev;
1853 struct ex_phy *phy = &ex->ex_phy[phy_id];
1854 u8 attached_sas_addr[8];
1857 res = sas_get_phy_attached_sas_addr(dev, phy_id, attached_sas_addr);
1859 case SMP_RESP_NO_PHY:
1860 phy->phy_state = PHY_NOT_PRESENT;
1861 sas_unregister_devs_sas_addr(dev, phy_id, last);
1863 case SMP_RESP_PHY_VACANT:
1864 phy->phy_state = PHY_VACANT;
1865 sas_unregister_devs_sas_addr(dev, phy_id, last);
1867 case SMP_RESP_FUNC_ACC:
1871 if (SAS_ADDR(attached_sas_addr) == 0) {
1872 phy->phy_state = PHY_EMPTY;
1873 sas_unregister_devs_sas_addr(dev, phy_id, last);
1874 } else if (SAS_ADDR(attached_sas_addr) ==
1875 SAS_ADDR(phy->attached_sas_addr)) {
1876 SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter\n",
1877 SAS_ADDR(dev->sas_addr), phy_id);
1878 sas_ex_phy_discover(dev, phy_id);
1880 res = sas_discover_new(dev, phy_id);
1886 * sas_rediscover - revalidate the domain.
1887 * @dev:domain device to be detect.
1888 * @phy_id: the phy id will be detected.
1890 * NOTE: this process _must_ quit (return) as soon as any connection
1891 * errors are encountered. Connection recovery is done elsewhere.
1892 * Discover process only interrogates devices in order to discover the
1893 * domain.For plugging out, we un-register the device only when it is
1894 * the last phy in the port, for other phys in this port, we just delete it
1895 * from the port.For inserting, we do discovery when it is the
1896 * first phy,for other phys in this port, we add it to the port to
1897 * forming the wide-port.
1899 static int sas_rediscover(struct domain_device *dev, const int phy_id)
1901 struct expander_device *ex = &dev->ex_dev;
1902 struct ex_phy *changed_phy = &ex->ex_phy[phy_id];
1905 bool last = true; /* is this the last phy of the port */
1907 SAS_DPRINTK("ex %016llx phy%d originated BROADCAST(CHANGE)\n",
1908 SAS_ADDR(dev->sas_addr), phy_id);
1910 if (SAS_ADDR(changed_phy->attached_sas_addr) != 0) {
1911 for (i = 0; i < ex->num_phys; i++) {
1912 struct ex_phy *phy = &ex->ex_phy[i];
1916 if (SAS_ADDR(phy->attached_sas_addr) ==
1917 SAS_ADDR(changed_phy->attached_sas_addr)) {
1918 SAS_DPRINTK("phy%d part of wide port with "
1919 "phy%d\n", phy_id, i);
1924 res = sas_rediscover_dev(dev, phy_id, last);
1926 res = sas_discover_new(dev, phy_id);
1931 * sas_revalidate_domain -- revalidate the domain
1932 * @port: port to the domain of interest
1934 * NOTE: this process _must_ quit (return) as soon as any connection
1935 * errors are encountered. Connection recovery is done elsewhere.
1936 * Discover process only interrogates devices in order to discover the
1939 int sas_ex_revalidate_domain(struct domain_device *port_dev)
1942 struct domain_device *dev = NULL;
1944 res = sas_find_bcast_dev(port_dev, &dev);
1948 struct expander_device *ex = &dev->ex_dev;
1953 res = sas_find_bcast_phy(dev, &phy_id, i, true);
1956 res = sas_rediscover(dev, phy_id);
1958 } while (i < ex->num_phys);
1964 int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
1965 struct request *req)
1967 struct domain_device *dev;
1969 struct request *rsp = req->next_rq;
1972 printk("%s: space for a smp response is missing\n",
1977 /* no rphy means no smp target support (ie aic94xx host) */
1979 return sas_smp_host_handler(shost, req, rsp);
1981 type = rphy->identify.device_type;
1983 if (type != SAS_EDGE_EXPANDER_DEVICE &&
1984 type != SAS_FANOUT_EXPANDER_DEVICE) {
1985 printk("%s: can we send a smp request to a device?\n",
1990 dev = sas_find_dev_by_rphy(rphy);
1992 printk("%s: fail to find a domain_device?\n", __func__);
1996 /* do we need to support multiple segments? */
1997 if (req->bio->bi_vcnt > 1 || rsp->bio->bi_vcnt > 1) {
1998 printk("%s: multiple segments req %u %u, rsp %u %u\n",
1999 __func__, req->bio->bi_vcnt, blk_rq_bytes(req),
2000 rsp->bio->bi_vcnt, blk_rq_bytes(rsp));
2004 ret = smp_execute_task(dev, bio_data(req->bio), blk_rq_bytes(req),
2005 bio_data(rsp->bio), blk_rq_bytes(rsp));
2007 /* positive number is the untransferred residual */
2008 rsp->resid_len = ret;
2011 } else if (ret == 0) {