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(unsigned long _task)
46 struct sas_task *task = (void *) _task;
49 spin_lock_irqsave(&task->task_state_lock, flags);
50 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
51 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
52 spin_unlock_irqrestore(&task->task_state_lock, flags);
54 complete(&task->completion);
57 static void smp_task_done(struct sas_task *task)
59 if (!del_timer(&task->timer))
61 complete(&task->completion);
64 /* Give it some long enough timeout. In seconds. */
65 #define SMP_TIMEOUT 10
67 static int smp_execute_task(struct domain_device *dev, void *req, int req_size,
68 void *resp, int resp_size)
71 struct sas_task *task = NULL;
72 struct sas_internal *i =
73 to_sas_internal(dev->port->ha->core.shost->transportt);
75 mutex_lock(&dev->ex_dev.cmd_mutex);
76 for (retry = 0; retry < 3; retry++) {
77 if (test_bit(SAS_DEV_GONE, &dev->state)) {
82 task = sas_alloc_task(GFP_KERNEL);
88 task->task_proto = dev->tproto;
89 sg_init_one(&task->smp_task.smp_req, req, req_size);
90 sg_init_one(&task->smp_task.smp_resp, resp, resp_size);
92 task->task_done = smp_task_done;
94 task->timer.data = (unsigned long) task;
95 task->timer.function = smp_task_timedout;
96 task->timer.expires = jiffies + SMP_TIMEOUT*HZ;
97 add_timer(&task->timer);
99 res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL);
102 del_timer(&task->timer);
103 SAS_DPRINTK("executing SMP task failed:%d\n", res);
107 wait_for_completion(&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 /* ---------- Allocations ---------- */
156 static inline void *alloc_smp_req(int size)
158 u8 *p = kzalloc(size, GFP_KERNEL);
164 static inline void *alloc_smp_resp(int size)
166 return kzalloc(size, GFP_KERNEL);
169 static char sas_route_char(struct domain_device *dev, struct ex_phy *phy)
171 switch (phy->routing_attr) {
173 if (dev->ex_dev.t2t_supp)
179 case SUBTRACTIVE_ROUTING:
186 static enum sas_dev_type to_dev_type(struct discover_resp *dr)
188 /* This is detecting a failure to transmit initial dev to host
189 * FIS as described in section J.5 of sas-2 r16
191 if (dr->attached_dev_type == NO_DEVICE && dr->attached_sata_dev &&
192 dr->linkrate >= SAS_LINK_RATE_1_5_GBPS)
195 return dr->attached_dev_type;
198 static void sas_set_ex_phy(struct domain_device *dev, int phy_id, void *rsp)
200 enum sas_dev_type dev_type;
201 enum sas_linkrate linkrate;
202 u8 sas_addr[SAS_ADDR_SIZE];
203 struct smp_resp *resp = rsp;
204 struct discover_resp *dr = &resp->disc;
205 struct expander_device *ex = &dev->ex_dev;
206 struct ex_phy *phy = &ex->ex_phy[phy_id];
207 struct sas_rphy *rphy = dev->rphy;
208 bool new_phy = !phy->phy;
212 phy->phy = sas_phy_alloc(&rphy->dev, phy_id);
214 /* FIXME: error_handling */
218 switch (resp->result) {
219 case SMP_RESP_PHY_VACANT:
220 phy->phy_state = PHY_VACANT;
223 phy->phy_state = PHY_NOT_PRESENT;
225 case SMP_RESP_FUNC_ACC:
226 phy->phy_state = PHY_EMPTY; /* do not know yet */
230 /* check if anything important changed to squelch debug */
231 dev_type = phy->attached_dev_type;
232 linkrate = phy->linkrate;
233 memcpy(sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
235 phy->attached_dev_type = to_dev_type(dr);
236 phy->phy_id = phy_id;
237 phy->linkrate = dr->linkrate;
238 phy->attached_sata_host = dr->attached_sata_host;
239 phy->attached_sata_dev = dr->attached_sata_dev;
240 phy->attached_sata_ps = dr->attached_sata_ps;
241 phy->attached_iproto = dr->iproto << 1;
242 phy->attached_tproto = dr->tproto << 1;
243 memcpy(phy->attached_sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE);
244 phy->attached_phy_id = dr->attached_phy_id;
245 phy->phy_change_count = dr->change_count;
246 phy->routing_attr = dr->routing_attr;
247 phy->virtual = dr->virtual;
248 phy->last_da_index = -1;
250 phy->phy->identify.sas_address = SAS_ADDR(phy->attached_sas_addr);
251 phy->phy->identify.device_type = dr->attached_dev_type;
252 phy->phy->identify.initiator_port_protocols = phy->attached_iproto;
253 phy->phy->identify.target_port_protocols = phy->attached_tproto;
254 if (!phy->attached_tproto && dr->attached_sata_dev)
255 phy->phy->identify.target_port_protocols = SAS_PROTOCOL_SATA;
256 phy->phy->identify.phy_identifier = phy_id;
257 phy->phy->minimum_linkrate_hw = dr->hmin_linkrate;
258 phy->phy->maximum_linkrate_hw = dr->hmax_linkrate;
259 phy->phy->minimum_linkrate = dr->pmin_linkrate;
260 phy->phy->maximum_linkrate = dr->pmax_linkrate;
261 phy->phy->negotiated_linkrate = phy->linkrate;
264 if (sas_phy_add(phy->phy)) {
265 sas_phy_free(phy->phy);
269 switch (phy->attached_dev_type) {
271 type = "stp pending";
277 if (phy->attached_iproto) {
278 if (phy->attached_tproto)
279 type = "host+target";
283 if (dr->attached_sata_dev)
297 /* this routine is polled by libata error recovery so filter
298 * unimportant messages
300 if (new_phy || phy->attached_dev_type != dev_type ||
301 phy->linkrate != linkrate ||
302 SAS_ADDR(phy->attached_sas_addr) != SAS_ADDR(sas_addr))
307 SAS_DPRINTK("ex %016llx phy%02d:%c:%X attached: %016llx (%s)\n",
308 SAS_ADDR(dev->sas_addr), phy->phy_id,
309 sas_route_char(dev, phy), phy->linkrate,
310 SAS_ADDR(phy->attached_sas_addr), type);
313 /* check if we have an existing attached ata device on this expander phy */
314 struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id)
316 struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy_id];
317 struct domain_device *dev;
318 struct sas_rphy *rphy;
323 rphy = ex_phy->port->rphy;
327 dev = sas_find_dev_by_rphy(rphy);
329 if (dev && dev_is_sata(dev))
335 #define DISCOVER_REQ_SIZE 16
336 #define DISCOVER_RESP_SIZE 56
338 static int sas_ex_phy_discover_helper(struct domain_device *dev, u8 *disc_req,
339 u8 *disc_resp, int single)
341 struct discover_resp *dr;
344 disc_req[9] = single;
346 res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE,
347 disc_resp, DISCOVER_RESP_SIZE);
350 dr = &((struct smp_resp *)disc_resp)->disc;
351 if (memcmp(dev->sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE) == 0) {
352 sas_printk("Found loopback topology, just ignore it!\n");
355 sas_set_ex_phy(dev, single, disc_resp);
359 int sas_ex_phy_discover(struct domain_device *dev, int single)
361 struct expander_device *ex = &dev->ex_dev;
366 disc_req = alloc_smp_req(DISCOVER_REQ_SIZE);
370 disc_resp = alloc_smp_req(DISCOVER_RESP_SIZE);
376 disc_req[1] = SMP_DISCOVER;
378 if (0 <= single && single < ex->num_phys) {
379 res = sas_ex_phy_discover_helper(dev, disc_req, disc_resp, single);
383 for (i = 0; i < ex->num_phys; i++) {
384 res = sas_ex_phy_discover_helper(dev, disc_req,
396 static int sas_expander_discover(struct domain_device *dev)
398 struct expander_device *ex = &dev->ex_dev;
401 ex->ex_phy = kzalloc(sizeof(*ex->ex_phy)*ex->num_phys, GFP_KERNEL);
405 res = sas_ex_phy_discover(dev, -1);
416 #define MAX_EXPANDER_PHYS 128
418 static void ex_assign_report_general(struct domain_device *dev,
419 struct smp_resp *resp)
421 struct report_general_resp *rg = &resp->rg;
423 dev->ex_dev.ex_change_count = be16_to_cpu(rg->change_count);
424 dev->ex_dev.max_route_indexes = be16_to_cpu(rg->route_indexes);
425 dev->ex_dev.num_phys = min(rg->num_phys, (u8)MAX_EXPANDER_PHYS);
426 dev->ex_dev.t2t_supp = rg->t2t_supp;
427 dev->ex_dev.conf_route_table = rg->conf_route_table;
428 dev->ex_dev.configuring = rg->configuring;
429 memcpy(dev->ex_dev.enclosure_logical_id, rg->enclosure_logical_id, 8);
432 #define RG_REQ_SIZE 8
433 #define RG_RESP_SIZE 32
435 static int sas_ex_general(struct domain_device *dev)
438 struct smp_resp *rg_resp;
442 rg_req = alloc_smp_req(RG_REQ_SIZE);
446 rg_resp = alloc_smp_resp(RG_RESP_SIZE);
452 rg_req[1] = SMP_REPORT_GENERAL;
454 for (i = 0; i < 5; i++) {
455 res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp,
459 SAS_DPRINTK("RG to ex %016llx failed:0x%x\n",
460 SAS_ADDR(dev->sas_addr), res);
462 } else if (rg_resp->result != SMP_RESP_FUNC_ACC) {
463 SAS_DPRINTK("RG:ex %016llx returned SMP result:0x%x\n",
464 SAS_ADDR(dev->sas_addr), rg_resp->result);
465 res = rg_resp->result;
469 ex_assign_report_general(dev, rg_resp);
471 if (dev->ex_dev.configuring) {
472 SAS_DPRINTK("RG: ex %llx self-configuring...\n",
473 SAS_ADDR(dev->sas_addr));
474 schedule_timeout_interruptible(5*HZ);
484 static void ex_assign_manuf_info(struct domain_device *dev, void
487 u8 *mi_resp = _mi_resp;
488 struct sas_rphy *rphy = dev->rphy;
489 struct sas_expander_device *edev = rphy_to_expander_device(rphy);
491 memcpy(edev->vendor_id, mi_resp + 12, SAS_EXPANDER_VENDOR_ID_LEN);
492 memcpy(edev->product_id, mi_resp + 20, SAS_EXPANDER_PRODUCT_ID_LEN);
493 memcpy(edev->product_rev, mi_resp + 36,
494 SAS_EXPANDER_PRODUCT_REV_LEN);
496 if (mi_resp[8] & 1) {
497 memcpy(edev->component_vendor_id, mi_resp + 40,
498 SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN);
499 edev->component_id = mi_resp[48] << 8 | mi_resp[49];
500 edev->component_revision_id = mi_resp[50];
504 #define MI_REQ_SIZE 8
505 #define MI_RESP_SIZE 64
507 static int sas_ex_manuf_info(struct domain_device *dev)
513 mi_req = alloc_smp_req(MI_REQ_SIZE);
517 mi_resp = alloc_smp_resp(MI_RESP_SIZE);
523 mi_req[1] = SMP_REPORT_MANUF_INFO;
525 res = smp_execute_task(dev, mi_req, MI_REQ_SIZE, mi_resp,MI_RESP_SIZE);
527 SAS_DPRINTK("MI: ex %016llx failed:0x%x\n",
528 SAS_ADDR(dev->sas_addr), res);
530 } else if (mi_resp[2] != SMP_RESP_FUNC_ACC) {
531 SAS_DPRINTK("MI ex %016llx returned SMP result:0x%x\n",
532 SAS_ADDR(dev->sas_addr), mi_resp[2]);
536 ex_assign_manuf_info(dev, mi_resp);
543 #define PC_REQ_SIZE 44
544 #define PC_RESP_SIZE 8
546 int sas_smp_phy_control(struct domain_device *dev, int phy_id,
547 enum phy_func phy_func,
548 struct sas_phy_linkrates *rates)
554 pc_req = alloc_smp_req(PC_REQ_SIZE);
558 pc_resp = alloc_smp_resp(PC_RESP_SIZE);
564 pc_req[1] = SMP_PHY_CONTROL;
566 pc_req[10]= phy_func;
568 pc_req[32] = rates->minimum_linkrate << 4;
569 pc_req[33] = rates->maximum_linkrate << 4;
572 res = smp_execute_task(dev, pc_req, PC_REQ_SIZE, pc_resp,PC_RESP_SIZE);
579 static void sas_ex_disable_phy(struct domain_device *dev, int phy_id)
581 struct expander_device *ex = &dev->ex_dev;
582 struct ex_phy *phy = &ex->ex_phy[phy_id];
584 sas_smp_phy_control(dev, phy_id, PHY_FUNC_DISABLE, NULL);
585 phy->linkrate = SAS_PHY_DISABLED;
588 static void sas_ex_disable_port(struct domain_device *dev, u8 *sas_addr)
590 struct expander_device *ex = &dev->ex_dev;
593 for (i = 0; i < ex->num_phys; i++) {
594 struct ex_phy *phy = &ex->ex_phy[i];
596 if (phy->phy_state == PHY_VACANT ||
597 phy->phy_state == PHY_NOT_PRESENT)
600 if (SAS_ADDR(phy->attached_sas_addr) == SAS_ADDR(sas_addr))
601 sas_ex_disable_phy(dev, i);
605 static int sas_dev_present_in_domain(struct asd_sas_port *port,
608 struct domain_device *dev;
610 if (SAS_ADDR(port->sas_addr) == SAS_ADDR(sas_addr))
612 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
613 if (SAS_ADDR(dev->sas_addr) == SAS_ADDR(sas_addr))
619 #define RPEL_REQ_SIZE 16
620 #define RPEL_RESP_SIZE 32
621 int sas_smp_get_phy_events(struct sas_phy *phy)
626 struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent);
627 struct domain_device *dev = sas_find_dev_by_rphy(rphy);
629 req = alloc_smp_req(RPEL_REQ_SIZE);
633 resp = alloc_smp_resp(RPEL_RESP_SIZE);
639 req[1] = SMP_REPORT_PHY_ERR_LOG;
640 req[9] = phy->number;
642 res = smp_execute_task(dev, req, RPEL_REQ_SIZE,
643 resp, RPEL_RESP_SIZE);
648 phy->invalid_dword_count = scsi_to_u32(&resp[12]);
649 phy->running_disparity_error_count = scsi_to_u32(&resp[16]);
650 phy->loss_of_dword_sync_count = scsi_to_u32(&resp[20]);
651 phy->phy_reset_problem_count = scsi_to_u32(&resp[24]);
659 #ifdef CONFIG_SCSI_SAS_ATA
661 #define RPS_REQ_SIZE 16
662 #define RPS_RESP_SIZE 60
664 int sas_get_report_phy_sata(struct domain_device *dev, int phy_id,
665 struct smp_resp *rps_resp)
668 u8 *rps_req = alloc_smp_req(RPS_REQ_SIZE);
669 u8 *resp = (u8 *)rps_resp;
674 rps_req[1] = SMP_REPORT_PHY_SATA;
677 res = smp_execute_task(dev, rps_req, RPS_REQ_SIZE,
678 rps_resp, RPS_RESP_SIZE);
680 /* 0x34 is the FIS type for the D2H fis. There's a potential
681 * standards cockup here. sas-2 explicitly specifies the FIS
682 * should be encoded so that FIS type is in resp[24].
683 * However, some expanders endian reverse this. Undo the
685 if (!res && resp[27] == 0x34 && resp[24] != 0x34) {
688 for (i = 0; i < 5; i++) {
693 resp[j + 0] = resp[j + 3];
694 resp[j + 1] = resp[j + 2];
705 static void sas_ex_get_linkrate(struct domain_device *parent,
706 struct domain_device *child,
707 struct ex_phy *parent_phy)
709 struct expander_device *parent_ex = &parent->ex_dev;
710 struct sas_port *port;
715 port = parent_phy->port;
717 for (i = 0; i < parent_ex->num_phys; i++) {
718 struct ex_phy *phy = &parent_ex->ex_phy[i];
720 if (phy->phy_state == PHY_VACANT ||
721 phy->phy_state == PHY_NOT_PRESENT)
724 if (SAS_ADDR(phy->attached_sas_addr) ==
725 SAS_ADDR(child->sas_addr)) {
727 child->min_linkrate = min(parent->min_linkrate,
729 child->max_linkrate = max(parent->max_linkrate,
732 sas_port_add_phy(port, phy->phy);
735 child->linkrate = min(parent_phy->linkrate, child->max_linkrate);
736 child->pathways = min(child->pathways, parent->pathways);
739 static struct domain_device *sas_ex_discover_end_dev(
740 struct domain_device *parent, int phy_id)
742 struct expander_device *parent_ex = &parent->ex_dev;
743 struct ex_phy *phy = &parent_ex->ex_phy[phy_id];
744 struct domain_device *child = NULL;
745 struct sas_rphy *rphy;
748 if (phy->attached_sata_host || phy->attached_sata_ps)
751 child = sas_alloc_device();
755 kref_get(&parent->kref);
756 child->parent = parent;
757 child->port = parent->port;
758 child->iproto = phy->attached_iproto;
759 memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
760 sas_hash_addr(child->hashed_sas_addr, child->sas_addr);
762 phy->port = sas_port_alloc(&parent->rphy->dev, phy_id);
763 if (unlikely(!phy->port))
765 if (unlikely(sas_port_add(phy->port) != 0)) {
766 sas_port_free(phy->port);
770 sas_ex_get_linkrate(parent, child, phy);
771 sas_device_set_phy(child, phy->port);
773 #ifdef CONFIG_SCSI_SAS_ATA
774 if ((phy->attached_tproto & SAS_PROTOCOL_STP) || phy->attached_sata_dev) {
775 res = sas_get_ata_info(child, phy);
779 rphy = sas_end_device_alloc(phy->port);
787 list_add_tail(&child->disco_list_node, &parent->port->disco_list);
789 res = sas_discover_sata(child);
791 SAS_DPRINTK("sas_discover_sata() for device %16llx at "
792 "%016llx:0x%x returned 0x%x\n",
793 SAS_ADDR(child->sas_addr),
794 SAS_ADDR(parent->sas_addr), phy_id, res);
799 if (phy->attached_tproto & SAS_PROTOCOL_SSP) {
800 child->dev_type = SAS_END_DEV;
801 rphy = sas_end_device_alloc(phy->port);
802 /* FIXME: error handling */
805 child->tproto = phy->attached_tproto;
809 sas_fill_in_rphy(child, rphy);
811 list_add_tail(&child->disco_list_node, &parent->port->disco_list);
813 res = sas_discover_end_dev(child);
815 SAS_DPRINTK("sas_discover_end_dev() for device %16llx "
816 "at %016llx:0x%x returned 0x%x\n",
817 SAS_ADDR(child->sas_addr),
818 SAS_ADDR(parent->sas_addr), phy_id, res);
822 SAS_DPRINTK("target proto 0x%x at %016llx:0x%x not handled\n",
823 phy->attached_tproto, SAS_ADDR(parent->sas_addr),
828 list_add_tail(&child->siblings, &parent_ex->children);
832 sas_rphy_free(child->rphy);
835 list_del(&child->disco_list_node);
836 spin_lock_irq(&parent->port->dev_list_lock);
837 list_del(&child->dev_list_node);
838 spin_unlock_irq(&parent->port->dev_list_lock);
840 sas_port_delete(phy->port);
843 sas_put_device(child);
847 /* See if this phy is part of a wide port */
848 static int sas_ex_join_wide_port(struct domain_device *parent, int phy_id)
850 struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id];
853 for (i = 0; i < parent->ex_dev.num_phys; i++) {
854 struct ex_phy *ephy = &parent->ex_dev.ex_phy[i];
859 if (!memcmp(phy->attached_sas_addr, ephy->attached_sas_addr,
860 SAS_ADDR_SIZE) && ephy->port) {
861 sas_port_add_phy(ephy->port, phy->phy);
862 phy->port = ephy->port;
863 phy->phy_state = PHY_DEVICE_DISCOVERED;
871 static struct domain_device *sas_ex_discover_expander(
872 struct domain_device *parent, int phy_id)
874 struct sas_expander_device *parent_ex = rphy_to_expander_device(parent->rphy);
875 struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id];
876 struct domain_device *child = NULL;
877 struct sas_rphy *rphy;
878 struct sas_expander_device *edev;
879 struct asd_sas_port *port;
882 if (phy->routing_attr == DIRECT_ROUTING) {
883 SAS_DPRINTK("ex %016llx:0x%x:D <--> ex %016llx:0x%x is not "
885 SAS_ADDR(parent->sas_addr), phy_id,
886 SAS_ADDR(phy->attached_sas_addr),
887 phy->attached_phy_id);
890 child = sas_alloc_device();
894 phy->port = sas_port_alloc(&parent->rphy->dev, phy_id);
895 /* FIXME: better error handling */
896 BUG_ON(sas_port_add(phy->port) != 0);
899 switch (phy->attached_dev_type) {
901 rphy = sas_expander_alloc(phy->port,
902 SAS_EDGE_EXPANDER_DEVICE);
905 rphy = sas_expander_alloc(phy->port,
906 SAS_FANOUT_EXPANDER_DEVICE);
909 rphy = NULL; /* shut gcc up */
914 edev = rphy_to_expander_device(rphy);
915 child->dev_type = phy->attached_dev_type;
916 kref_get(&parent->kref);
917 child->parent = parent;
919 child->iproto = phy->attached_iproto;
920 child->tproto = phy->attached_tproto;
921 memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
922 sas_hash_addr(child->hashed_sas_addr, child->sas_addr);
923 sas_ex_get_linkrate(parent, child, phy);
924 edev->level = parent_ex->level + 1;
925 parent->port->disc.max_level = max(parent->port->disc.max_level,
928 sas_fill_in_rphy(child, rphy);
931 spin_lock_irq(&parent->port->dev_list_lock);
932 list_add_tail(&child->dev_list_node, &parent->port->dev_list);
933 spin_unlock_irq(&parent->port->dev_list_lock);
935 res = sas_discover_expander(child);
937 spin_lock_irq(&parent->port->dev_list_lock);
938 list_del(&child->dev_list_node);
939 spin_unlock_irq(&parent->port->dev_list_lock);
940 sas_put_device(child);
943 list_add_tail(&child->siblings, &parent->ex_dev.children);
947 static int sas_ex_discover_dev(struct domain_device *dev, int phy_id)
949 struct expander_device *ex = &dev->ex_dev;
950 struct ex_phy *ex_phy = &ex->ex_phy[phy_id];
951 struct domain_device *child = NULL;
955 if (ex_phy->linkrate == SAS_SATA_SPINUP_HOLD) {
956 if (!sas_smp_phy_control(dev, phy_id, PHY_FUNC_LINK_RESET, NULL))
957 res = sas_ex_phy_discover(dev, phy_id);
962 /* Parent and domain coherency */
963 if (!dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) ==
964 SAS_ADDR(dev->port->sas_addr))) {
965 sas_add_parent_port(dev, phy_id);
968 if (dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) ==
969 SAS_ADDR(dev->parent->sas_addr))) {
970 sas_add_parent_port(dev, phy_id);
971 if (ex_phy->routing_attr == TABLE_ROUTING)
972 sas_configure_phy(dev, phy_id, dev->port->sas_addr, 1);
976 if (sas_dev_present_in_domain(dev->port, ex_phy->attached_sas_addr))
977 sas_ex_disable_port(dev, ex_phy->attached_sas_addr);
979 if (ex_phy->attached_dev_type == NO_DEVICE) {
980 if (ex_phy->routing_attr == DIRECT_ROUTING) {
981 memset(ex_phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
982 sas_configure_routing(dev, ex_phy->attached_sas_addr);
985 } else if (ex_phy->linkrate == SAS_LINK_RATE_UNKNOWN)
988 if (ex_phy->attached_dev_type != SAS_END_DEV &&
989 ex_phy->attached_dev_type != FANOUT_DEV &&
990 ex_phy->attached_dev_type != EDGE_DEV &&
991 ex_phy->attached_dev_type != SATA_PENDING) {
992 SAS_DPRINTK("unknown device type(0x%x) attached to ex %016llx "
993 "phy 0x%x\n", ex_phy->attached_dev_type,
994 SAS_ADDR(dev->sas_addr),
999 res = sas_configure_routing(dev, ex_phy->attached_sas_addr);
1001 SAS_DPRINTK("configure routing for dev %016llx "
1002 "reported 0x%x. Forgotten\n",
1003 SAS_ADDR(ex_phy->attached_sas_addr), res);
1004 sas_disable_routing(dev, ex_phy->attached_sas_addr);
1008 res = sas_ex_join_wide_port(dev, phy_id);
1010 SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n",
1011 phy_id, SAS_ADDR(ex_phy->attached_sas_addr));
1015 switch (ex_phy->attached_dev_type) {
1018 child = sas_ex_discover_end_dev(dev, phy_id);
1021 if (SAS_ADDR(dev->port->disc.fanout_sas_addr)) {
1022 SAS_DPRINTK("second fanout expander %016llx phy 0x%x "
1023 "attached to ex %016llx phy 0x%x\n",
1024 SAS_ADDR(ex_phy->attached_sas_addr),
1025 ex_phy->attached_phy_id,
1026 SAS_ADDR(dev->sas_addr),
1028 sas_ex_disable_phy(dev, phy_id);
1031 memcpy(dev->port->disc.fanout_sas_addr,
1032 ex_phy->attached_sas_addr, SAS_ADDR_SIZE);
1035 child = sas_ex_discover_expander(dev, phy_id);
1044 for (i = 0; i < ex->num_phys; i++) {
1045 if (ex->ex_phy[i].phy_state == PHY_VACANT ||
1046 ex->ex_phy[i].phy_state == PHY_NOT_PRESENT)
1049 * Due to races, the phy might not get added to the
1050 * wide port, so we add the phy to the wide port here.
1052 if (SAS_ADDR(ex->ex_phy[i].attached_sas_addr) ==
1053 SAS_ADDR(child->sas_addr)) {
1054 ex->ex_phy[i].phy_state= PHY_DEVICE_DISCOVERED;
1055 res = sas_ex_join_wide_port(dev, i);
1057 SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n",
1058 i, SAS_ADDR(ex->ex_phy[i].attached_sas_addr));
1067 static int sas_find_sub_addr(struct domain_device *dev, u8 *sub_addr)
1069 struct expander_device *ex = &dev->ex_dev;
1072 for (i = 0; i < ex->num_phys; i++) {
1073 struct ex_phy *phy = &ex->ex_phy[i];
1075 if (phy->phy_state == PHY_VACANT ||
1076 phy->phy_state == PHY_NOT_PRESENT)
1079 if ((phy->attached_dev_type == EDGE_DEV ||
1080 phy->attached_dev_type == FANOUT_DEV) &&
1081 phy->routing_attr == SUBTRACTIVE_ROUTING) {
1083 memcpy(sub_addr, phy->attached_sas_addr,SAS_ADDR_SIZE);
1091 static int sas_check_level_subtractive_boundary(struct domain_device *dev)
1093 struct expander_device *ex = &dev->ex_dev;
1094 struct domain_device *child;
1095 u8 sub_addr[8] = {0, };
1097 list_for_each_entry(child, &ex->children, siblings) {
1098 if (child->dev_type != EDGE_DEV &&
1099 child->dev_type != FANOUT_DEV)
1101 if (sub_addr[0] == 0) {
1102 sas_find_sub_addr(child, sub_addr);
1107 if (sas_find_sub_addr(child, s2) &&
1108 (SAS_ADDR(sub_addr) != SAS_ADDR(s2))) {
1110 SAS_DPRINTK("ex %016llx->%016llx-?->%016llx "
1111 "diverges from subtractive "
1112 "boundary %016llx\n",
1113 SAS_ADDR(dev->sas_addr),
1114 SAS_ADDR(child->sas_addr),
1116 SAS_ADDR(sub_addr));
1118 sas_ex_disable_port(child, s2);
1125 * sas_ex_discover_devices -- discover devices attached to this expander
1126 * dev: pointer to the expander domain device
1127 * single: if you want to do a single phy, else set to -1;
1129 * Configure this expander for use with its devices and register the
1130 * devices of this expander.
1132 static int sas_ex_discover_devices(struct domain_device *dev, int single)
1134 struct expander_device *ex = &dev->ex_dev;
1135 int i = 0, end = ex->num_phys;
1138 if (0 <= single && single < end) {
1143 for ( ; i < end; i++) {
1144 struct ex_phy *ex_phy = &ex->ex_phy[i];
1146 if (ex_phy->phy_state == PHY_VACANT ||
1147 ex_phy->phy_state == PHY_NOT_PRESENT ||
1148 ex_phy->phy_state == PHY_DEVICE_DISCOVERED)
1151 switch (ex_phy->linkrate) {
1152 case SAS_PHY_DISABLED:
1153 case SAS_PHY_RESET_PROBLEM:
1154 case SAS_SATA_PORT_SELECTOR:
1157 res = sas_ex_discover_dev(dev, i);
1165 sas_check_level_subtractive_boundary(dev);
1170 static int sas_check_ex_subtractive_boundary(struct domain_device *dev)
1172 struct expander_device *ex = &dev->ex_dev;
1174 u8 *sub_sas_addr = NULL;
1176 if (dev->dev_type != EDGE_DEV)
1179 for (i = 0; i < ex->num_phys; i++) {
1180 struct ex_phy *phy = &ex->ex_phy[i];
1182 if (phy->phy_state == PHY_VACANT ||
1183 phy->phy_state == PHY_NOT_PRESENT)
1186 if ((phy->attached_dev_type == FANOUT_DEV ||
1187 phy->attached_dev_type == EDGE_DEV) &&
1188 phy->routing_attr == SUBTRACTIVE_ROUTING) {
1191 sub_sas_addr = &phy->attached_sas_addr[0];
1192 else if (SAS_ADDR(sub_sas_addr) !=
1193 SAS_ADDR(phy->attached_sas_addr)) {
1195 SAS_DPRINTK("ex %016llx phy 0x%x "
1196 "diverges(%016llx) on subtractive "
1197 "boundary(%016llx). Disabled\n",
1198 SAS_ADDR(dev->sas_addr), i,
1199 SAS_ADDR(phy->attached_sas_addr),
1200 SAS_ADDR(sub_sas_addr));
1201 sas_ex_disable_phy(dev, i);
1208 static void sas_print_parent_topology_bug(struct domain_device *child,
1209 struct ex_phy *parent_phy,
1210 struct ex_phy *child_phy)
1212 static const char *ex_type[] = {
1213 [EDGE_DEV] = "edge",
1214 [FANOUT_DEV] = "fanout",
1216 struct domain_device *parent = child->parent;
1218 sas_printk("%s ex %016llx phy 0x%x <--> %s ex %016llx "
1219 "phy 0x%x has %c:%c routing link!\n",
1221 ex_type[parent->dev_type],
1222 SAS_ADDR(parent->sas_addr),
1225 ex_type[child->dev_type],
1226 SAS_ADDR(child->sas_addr),
1229 sas_route_char(parent, parent_phy),
1230 sas_route_char(child, child_phy));
1233 static int sas_check_eeds(struct domain_device *child,
1234 struct ex_phy *parent_phy,
1235 struct ex_phy *child_phy)
1238 struct domain_device *parent = child->parent;
1240 if (SAS_ADDR(parent->port->disc.fanout_sas_addr) != 0) {
1242 SAS_DPRINTK("edge ex %016llx phy S:0x%x <--> edge ex %016llx "
1243 "phy S:0x%x, while there is a fanout ex %016llx\n",
1244 SAS_ADDR(parent->sas_addr),
1246 SAS_ADDR(child->sas_addr),
1248 SAS_ADDR(parent->port->disc.fanout_sas_addr));
1249 } else if (SAS_ADDR(parent->port->disc.eeds_a) == 0) {
1250 memcpy(parent->port->disc.eeds_a, parent->sas_addr,
1252 memcpy(parent->port->disc.eeds_b, child->sas_addr,
1254 } else if (((SAS_ADDR(parent->port->disc.eeds_a) ==
1255 SAS_ADDR(parent->sas_addr)) ||
1256 (SAS_ADDR(parent->port->disc.eeds_a) ==
1257 SAS_ADDR(child->sas_addr)))
1259 ((SAS_ADDR(parent->port->disc.eeds_b) ==
1260 SAS_ADDR(parent->sas_addr)) ||
1261 (SAS_ADDR(parent->port->disc.eeds_b) ==
1262 SAS_ADDR(child->sas_addr))))
1266 SAS_DPRINTK("edge ex %016llx phy 0x%x <--> edge ex %016llx "
1267 "phy 0x%x link forms a third EEDS!\n",
1268 SAS_ADDR(parent->sas_addr),
1270 SAS_ADDR(child->sas_addr),
1277 /* Here we spill over 80 columns. It is intentional.
1279 static int sas_check_parent_topology(struct domain_device *child)
1281 struct expander_device *child_ex = &child->ex_dev;
1282 struct expander_device *parent_ex;
1289 if (child->parent->dev_type != EDGE_DEV &&
1290 child->parent->dev_type != FANOUT_DEV)
1293 parent_ex = &child->parent->ex_dev;
1295 for (i = 0; i < parent_ex->num_phys; i++) {
1296 struct ex_phy *parent_phy = &parent_ex->ex_phy[i];
1297 struct ex_phy *child_phy;
1299 if (parent_phy->phy_state == PHY_VACANT ||
1300 parent_phy->phy_state == PHY_NOT_PRESENT)
1303 if (SAS_ADDR(parent_phy->attached_sas_addr) != SAS_ADDR(child->sas_addr))
1306 child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id];
1308 switch (child->parent->dev_type) {
1310 if (child->dev_type == FANOUT_DEV) {
1311 if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING ||
1312 child_phy->routing_attr != TABLE_ROUTING) {
1313 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1316 } else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) {
1317 if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) {
1318 res = sas_check_eeds(child, parent_phy, child_phy);
1319 } else if (child_phy->routing_attr != TABLE_ROUTING) {
1320 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1323 } else if (parent_phy->routing_attr == TABLE_ROUTING) {
1324 if (child_phy->routing_attr == SUBTRACTIVE_ROUTING ||
1325 (child_phy->routing_attr == TABLE_ROUTING &&
1326 child_ex->t2t_supp && parent_ex->t2t_supp)) {
1329 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1335 if (parent_phy->routing_attr != TABLE_ROUTING ||
1336 child_phy->routing_attr != SUBTRACTIVE_ROUTING) {
1337 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1349 #define RRI_REQ_SIZE 16
1350 #define RRI_RESP_SIZE 44
1352 static int sas_configure_present(struct domain_device *dev, int phy_id,
1353 u8 *sas_addr, int *index, int *present)
1356 struct expander_device *ex = &dev->ex_dev;
1357 struct ex_phy *phy = &ex->ex_phy[phy_id];
1364 rri_req = alloc_smp_req(RRI_REQ_SIZE);
1368 rri_resp = alloc_smp_resp(RRI_RESP_SIZE);
1374 rri_req[1] = SMP_REPORT_ROUTE_INFO;
1375 rri_req[9] = phy_id;
1377 for (i = 0; i < ex->max_route_indexes ; i++) {
1378 *(__be16 *)(rri_req+6) = cpu_to_be16(i);
1379 res = smp_execute_task(dev, rri_req, RRI_REQ_SIZE, rri_resp,
1384 if (res == SMP_RESP_NO_INDEX) {
1385 SAS_DPRINTK("overflow of indexes: dev %016llx "
1386 "phy 0x%x index 0x%x\n",
1387 SAS_ADDR(dev->sas_addr), phy_id, i);
1389 } else if (res != SMP_RESP_FUNC_ACC) {
1390 SAS_DPRINTK("%s: dev %016llx phy 0x%x index 0x%x "
1391 "result 0x%x\n", __func__,
1392 SAS_ADDR(dev->sas_addr), phy_id, i, res);
1395 if (SAS_ADDR(sas_addr) != 0) {
1396 if (SAS_ADDR(rri_resp+16) == SAS_ADDR(sas_addr)) {
1398 if ((rri_resp[12] & 0x80) == 0x80)
1403 } else if (SAS_ADDR(rri_resp+16) == 0) {
1408 } else if (SAS_ADDR(rri_resp+16) == 0 &&
1409 phy->last_da_index < i) {
1410 phy->last_da_index = i;
1423 #define CRI_REQ_SIZE 44
1424 #define CRI_RESP_SIZE 8
1426 static int sas_configure_set(struct domain_device *dev, int phy_id,
1427 u8 *sas_addr, int index, int include)
1433 cri_req = alloc_smp_req(CRI_REQ_SIZE);
1437 cri_resp = alloc_smp_resp(CRI_RESP_SIZE);
1443 cri_req[1] = SMP_CONF_ROUTE_INFO;
1444 *(__be16 *)(cri_req+6) = cpu_to_be16(index);
1445 cri_req[9] = phy_id;
1446 if (SAS_ADDR(sas_addr) == 0 || !include)
1447 cri_req[12] |= 0x80;
1448 memcpy(cri_req+16, sas_addr, SAS_ADDR_SIZE);
1450 res = smp_execute_task(dev, cri_req, CRI_REQ_SIZE, cri_resp,
1455 if (res == SMP_RESP_NO_INDEX) {
1456 SAS_DPRINTK("overflow of indexes: dev %016llx phy 0x%x "
1458 SAS_ADDR(dev->sas_addr), phy_id, index);
1466 static int sas_configure_phy(struct domain_device *dev, int phy_id,
1467 u8 *sas_addr, int include)
1473 res = sas_configure_present(dev, phy_id, sas_addr, &index, &present);
1476 if (include ^ present)
1477 return sas_configure_set(dev, phy_id, sas_addr, index,include);
1483 * sas_configure_parent -- configure routing table of parent
1484 * parent: parent expander
1485 * child: child expander
1486 * sas_addr: SAS port identifier of device directly attached to child
1488 static int sas_configure_parent(struct domain_device *parent,
1489 struct domain_device *child,
1490 u8 *sas_addr, int include)
1492 struct expander_device *ex_parent = &parent->ex_dev;
1496 if (parent->parent) {
1497 res = sas_configure_parent(parent->parent, parent, sas_addr,
1503 if (ex_parent->conf_route_table == 0) {
1504 SAS_DPRINTK("ex %016llx has self-configuring routing table\n",
1505 SAS_ADDR(parent->sas_addr));
1509 for (i = 0; i < ex_parent->num_phys; i++) {
1510 struct ex_phy *phy = &ex_parent->ex_phy[i];
1512 if ((phy->routing_attr == TABLE_ROUTING) &&
1513 (SAS_ADDR(phy->attached_sas_addr) ==
1514 SAS_ADDR(child->sas_addr))) {
1515 res = sas_configure_phy(parent, i, sas_addr, include);
1525 * sas_configure_routing -- configure routing
1526 * dev: expander device
1527 * sas_addr: port identifier of device directly attached to the expander device
1529 static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr)
1532 return sas_configure_parent(dev->parent, dev, sas_addr, 1);
1536 static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr)
1539 return sas_configure_parent(dev->parent, dev, sas_addr, 0);
1544 * sas_discover_expander -- expander discovery
1545 * @ex: pointer to expander domain device
1547 * See comment in sas_discover_sata().
1549 static int sas_discover_expander(struct domain_device *dev)
1553 res = sas_notify_lldd_dev_found(dev);
1557 res = sas_ex_general(dev);
1560 res = sas_ex_manuf_info(dev);
1564 res = sas_expander_discover(dev);
1566 SAS_DPRINTK("expander %016llx discovery failed(0x%x)\n",
1567 SAS_ADDR(dev->sas_addr), res);
1571 sas_check_ex_subtractive_boundary(dev);
1572 res = sas_check_parent_topology(dev);
1577 sas_notify_lldd_dev_gone(dev);
1581 static int sas_ex_level_discovery(struct asd_sas_port *port, const int level)
1584 struct domain_device *dev;
1586 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
1587 if (dev->dev_type == EDGE_DEV ||
1588 dev->dev_type == FANOUT_DEV) {
1589 struct sas_expander_device *ex =
1590 rphy_to_expander_device(dev->rphy);
1592 if (level == ex->level)
1593 res = sas_ex_discover_devices(dev, -1);
1595 res = sas_ex_discover_devices(port->port_dev, -1);
1603 static int sas_ex_bfs_disc(struct asd_sas_port *port)
1609 level = port->disc.max_level;
1610 res = sas_ex_level_discovery(port, level);
1612 } while (level < port->disc.max_level);
1617 int sas_discover_root_expander(struct domain_device *dev)
1620 struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy);
1622 res = sas_rphy_add(dev->rphy);
1626 ex->level = dev->port->disc.max_level; /* 0 */
1627 res = sas_discover_expander(dev);
1631 sas_ex_bfs_disc(dev->port);
1636 sas_rphy_remove(dev->rphy);
1641 /* ---------- Domain revalidation ---------- */
1643 static int sas_get_phy_discover(struct domain_device *dev,
1644 int phy_id, struct smp_resp *disc_resp)
1649 disc_req = alloc_smp_req(DISCOVER_REQ_SIZE);
1653 disc_req[1] = SMP_DISCOVER;
1654 disc_req[9] = phy_id;
1656 res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE,
1657 disc_resp, DISCOVER_RESP_SIZE);
1660 else if (disc_resp->result != SMP_RESP_FUNC_ACC) {
1661 res = disc_resp->result;
1669 static int sas_get_phy_change_count(struct domain_device *dev,
1670 int phy_id, int *pcc)
1673 struct smp_resp *disc_resp;
1675 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
1679 res = sas_get_phy_discover(dev, phy_id, disc_resp);
1681 *pcc = disc_resp->disc.change_count;
1687 static int sas_get_phy_attached_dev(struct domain_device *dev, int phy_id,
1688 u8 *sas_addr, enum sas_dev_type *type)
1691 struct smp_resp *disc_resp;
1692 struct discover_resp *dr;
1694 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
1697 dr = &disc_resp->disc;
1699 res = sas_get_phy_discover(dev, phy_id, disc_resp);
1701 memcpy(sas_addr, disc_resp->disc.attached_sas_addr, 8);
1702 *type = to_dev_type(dr);
1704 memset(sas_addr, 0, 8);
1710 static int sas_find_bcast_phy(struct domain_device *dev, int *phy_id,
1711 int from_phy, bool update)
1713 struct expander_device *ex = &dev->ex_dev;
1717 for (i = from_phy; i < ex->num_phys; i++) {
1718 int phy_change_count = 0;
1720 res = sas_get_phy_change_count(dev, i, &phy_change_count);
1723 else if (phy_change_count != ex->ex_phy[i].phy_change_count) {
1725 ex->ex_phy[i].phy_change_count =
1735 static int sas_get_ex_change_count(struct domain_device *dev, int *ecc)
1739 struct smp_resp *rg_resp;
1741 rg_req = alloc_smp_req(RG_REQ_SIZE);
1745 rg_resp = alloc_smp_resp(RG_RESP_SIZE);
1751 rg_req[1] = SMP_REPORT_GENERAL;
1753 res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp,
1757 if (rg_resp->result != SMP_RESP_FUNC_ACC) {
1758 res = rg_resp->result;
1762 *ecc = be16_to_cpu(rg_resp->rg.change_count);
1769 * sas_find_bcast_dev - find the device issue BROADCAST(CHANGE).
1770 * @dev:domain device to be detect.
1771 * @src_dev: the device which originated BROADCAST(CHANGE).
1773 * Add self-configuration expander suport. Suppose two expander cascading,
1774 * when the first level expander is self-configuring, hotplug the disks in
1775 * second level expander, BROADCAST(CHANGE) will not only be originated
1776 * in the second level expander, but also be originated in the first level
1777 * expander (see SAS protocol SAS 2r-14, 7.11 for detail), it is to say,
1778 * expander changed count in two level expanders will all increment at least
1779 * once, but the phy which chang count has changed is the source device which
1783 static int sas_find_bcast_dev(struct domain_device *dev,
1784 struct domain_device **src_dev)
1786 struct expander_device *ex = &dev->ex_dev;
1787 int ex_change_count = -1;
1790 struct domain_device *ch;
1792 res = sas_get_ex_change_count(dev, &ex_change_count);
1795 if (ex_change_count != -1 && ex_change_count != ex->ex_change_count) {
1796 /* Just detect if this expander phys phy change count changed,
1797 * in order to determine if this expander originate BROADCAST,
1798 * and do not update phy change count field in our structure.
1800 res = sas_find_bcast_phy(dev, &phy_id, 0, false);
1803 ex->ex_change_count = ex_change_count;
1804 SAS_DPRINTK("Expander phy change count has changed\n");
1807 SAS_DPRINTK("Expander phys DID NOT change\n");
1809 list_for_each_entry(ch, &ex->children, siblings) {
1810 if (ch->dev_type == EDGE_DEV || ch->dev_type == FANOUT_DEV) {
1811 res = sas_find_bcast_dev(ch, src_dev);
1820 static void sas_unregister_ex_tree(struct asd_sas_port *port, struct domain_device *dev)
1822 struct expander_device *ex = &dev->ex_dev;
1823 struct domain_device *child, *n;
1825 list_for_each_entry_safe(child, n, &ex->children, siblings) {
1826 set_bit(SAS_DEV_GONE, &child->state);
1827 if (child->dev_type == EDGE_DEV ||
1828 child->dev_type == FANOUT_DEV)
1829 sas_unregister_ex_tree(port, child);
1831 sas_unregister_dev(port, child);
1833 sas_unregister_dev(port, dev);
1836 static void sas_unregister_devs_sas_addr(struct domain_device *parent,
1837 int phy_id, bool last)
1839 struct expander_device *ex_dev = &parent->ex_dev;
1840 struct ex_phy *phy = &ex_dev->ex_phy[phy_id];
1841 struct domain_device *child, *n, *found = NULL;
1843 list_for_each_entry_safe(child, n,
1844 &ex_dev->children, siblings) {
1845 if (SAS_ADDR(child->sas_addr) ==
1846 SAS_ADDR(phy->attached_sas_addr)) {
1847 set_bit(SAS_DEV_GONE, &child->state);
1848 if (child->dev_type == EDGE_DEV ||
1849 child->dev_type == FANOUT_DEV)
1850 sas_unregister_ex_tree(parent->port, child);
1852 sas_unregister_dev(parent->port, child);
1857 sas_disable_routing(parent, phy->attached_sas_addr);
1859 memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
1861 sas_port_delete_phy(phy->port, phy->phy);
1862 sas_device_set_phy(found, phy->port);
1863 if (phy->port->num_phys == 0)
1864 sas_port_delete(phy->port);
1869 static int sas_discover_bfs_by_root_level(struct domain_device *root,
1872 struct expander_device *ex_root = &root->ex_dev;
1873 struct domain_device *child;
1876 list_for_each_entry(child, &ex_root->children, siblings) {
1877 if (child->dev_type == EDGE_DEV ||
1878 child->dev_type == FANOUT_DEV) {
1879 struct sas_expander_device *ex =
1880 rphy_to_expander_device(child->rphy);
1882 if (level > ex->level)
1883 res = sas_discover_bfs_by_root_level(child,
1885 else if (level == ex->level)
1886 res = sas_ex_discover_devices(child, -1);
1892 static int sas_discover_bfs_by_root(struct domain_device *dev)
1895 struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy);
1896 int level = ex->level+1;
1898 res = sas_ex_discover_devices(dev, -1);
1902 res = sas_discover_bfs_by_root_level(dev, level);
1905 } while (level <= dev->port->disc.max_level);
1910 static int sas_discover_new(struct domain_device *dev, int phy_id)
1912 struct ex_phy *ex_phy = &dev->ex_dev.ex_phy[phy_id];
1913 struct domain_device *child;
1917 SAS_DPRINTK("ex %016llx phy%d new device attached\n",
1918 SAS_ADDR(dev->sas_addr), phy_id);
1919 res = sas_ex_phy_discover(dev, phy_id);
1922 /* to support the wide port inserted */
1923 for (i = 0; i < dev->ex_dev.num_phys; i++) {
1924 struct ex_phy *ex_phy_temp = &dev->ex_dev.ex_phy[i];
1927 if (SAS_ADDR(ex_phy_temp->attached_sas_addr) ==
1928 SAS_ADDR(ex_phy->attached_sas_addr)) {
1934 sas_ex_join_wide_port(dev, phy_id);
1937 res = sas_ex_discover_devices(dev, phy_id);
1940 list_for_each_entry(child, &dev->ex_dev.children, siblings) {
1941 if (SAS_ADDR(child->sas_addr) ==
1942 SAS_ADDR(ex_phy->attached_sas_addr)) {
1943 if (child->dev_type == EDGE_DEV ||
1944 child->dev_type == FANOUT_DEV)
1945 res = sas_discover_bfs_by_root(child);
1953 static bool dev_type_flutter(enum sas_dev_type new, enum sas_dev_type old)
1958 /* treat device directed resets as flutter, if we went
1959 * SAS_END_DEV to SATA_PENDING the link needs recovery
1961 if ((old == SATA_PENDING && new == SAS_END_DEV) ||
1962 (old == SAS_END_DEV && new == SATA_PENDING))
1968 static int sas_rediscover_dev(struct domain_device *dev, int phy_id, bool last)
1970 struct expander_device *ex = &dev->ex_dev;
1971 struct ex_phy *phy = &ex->ex_phy[phy_id];
1972 enum sas_dev_type type = NO_DEVICE;
1976 res = sas_get_phy_attached_dev(dev, phy_id, sas_addr, &type);
1978 case SMP_RESP_NO_PHY:
1979 phy->phy_state = PHY_NOT_PRESENT;
1980 sas_unregister_devs_sas_addr(dev, phy_id, last);
1982 case SMP_RESP_PHY_VACANT:
1983 phy->phy_state = PHY_VACANT;
1984 sas_unregister_devs_sas_addr(dev, phy_id, last);
1986 case SMP_RESP_FUNC_ACC:
1990 if (SAS_ADDR(sas_addr) == 0) {
1991 phy->phy_state = PHY_EMPTY;
1992 sas_unregister_devs_sas_addr(dev, phy_id, last);
1994 } else if (SAS_ADDR(sas_addr) == SAS_ADDR(phy->attached_sas_addr) &&
1995 dev_type_flutter(type, phy->attached_dev_type)) {
1996 struct domain_device *ata_dev = sas_ex_to_ata(dev, phy_id);
1999 sas_ex_phy_discover(dev, phy_id);
2001 if (ata_dev && phy->attached_dev_type == SATA_PENDING)
2002 action = ", needs recovery";
2003 SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter%s\n",
2004 SAS_ADDR(dev->sas_addr), phy_id, action);
2008 /* delete the old link */
2009 if (SAS_ADDR(phy->attached_sas_addr) &&
2010 SAS_ADDR(sas_addr) != SAS_ADDR(phy->attached_sas_addr)) {
2011 SAS_DPRINTK("ex %016llx phy 0x%x replace %016llx\n",
2012 SAS_ADDR(dev->sas_addr), phy_id,
2013 SAS_ADDR(phy->attached_sas_addr));
2014 sas_unregister_devs_sas_addr(dev, phy_id, last);
2017 return sas_discover_new(dev, phy_id);
2021 * sas_rediscover - revalidate the domain.
2022 * @dev:domain device to be detect.
2023 * @phy_id: the phy id will be detected.
2025 * NOTE: this process _must_ quit (return) as soon as any connection
2026 * errors are encountered. Connection recovery is done elsewhere.
2027 * Discover process only interrogates devices in order to discover the
2028 * domain.For plugging out, we un-register the device only when it is
2029 * the last phy in the port, for other phys in this port, we just delete it
2030 * from the port.For inserting, we do discovery when it is the
2031 * first phy,for other phys in this port, we add it to the port to
2032 * forming the wide-port.
2034 static int sas_rediscover(struct domain_device *dev, const int phy_id)
2036 struct expander_device *ex = &dev->ex_dev;
2037 struct ex_phy *changed_phy = &ex->ex_phy[phy_id];
2040 bool last = true; /* is this the last phy of the port */
2042 SAS_DPRINTK("ex %016llx phy%d originated BROADCAST(CHANGE)\n",
2043 SAS_ADDR(dev->sas_addr), phy_id);
2045 if (SAS_ADDR(changed_phy->attached_sas_addr) != 0) {
2046 for (i = 0; i < ex->num_phys; i++) {
2047 struct ex_phy *phy = &ex->ex_phy[i];
2051 if (SAS_ADDR(phy->attached_sas_addr) ==
2052 SAS_ADDR(changed_phy->attached_sas_addr)) {
2053 SAS_DPRINTK("phy%d part of wide port with "
2054 "phy%d\n", phy_id, i);
2059 res = sas_rediscover_dev(dev, phy_id, last);
2061 res = sas_discover_new(dev, phy_id);
2066 * sas_revalidate_domain -- revalidate the domain
2067 * @port: port to the domain of interest
2069 * NOTE: this process _must_ quit (return) as soon as any connection
2070 * errors are encountered. Connection recovery is done elsewhere.
2071 * Discover process only interrogates devices in order to discover the
2074 int sas_ex_revalidate_domain(struct domain_device *port_dev)
2077 struct domain_device *dev = NULL;
2079 res = sas_find_bcast_dev(port_dev, &dev);
2083 struct expander_device *ex = &dev->ex_dev;
2088 res = sas_find_bcast_phy(dev, &phy_id, i, true);
2091 res = sas_rediscover(dev, phy_id);
2093 } while (i < ex->num_phys);
2099 int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
2100 struct request *req)
2102 struct domain_device *dev;
2104 struct request *rsp = req->next_rq;
2107 printk("%s: space for a smp response is missing\n",
2112 /* no rphy means no smp target support (ie aic94xx host) */
2114 return sas_smp_host_handler(shost, req, rsp);
2116 type = rphy->identify.device_type;
2118 if (type != SAS_EDGE_EXPANDER_DEVICE &&
2119 type != SAS_FANOUT_EXPANDER_DEVICE) {
2120 printk("%s: can we send a smp request to a device?\n",
2125 dev = sas_find_dev_by_rphy(rphy);
2127 printk("%s: fail to find a domain_device?\n", __func__);
2131 /* do we need to support multiple segments? */
2132 if (req->bio->bi_vcnt > 1 || rsp->bio->bi_vcnt > 1) {
2133 printk("%s: multiple segments req %u %u, rsp %u %u\n",
2134 __func__, req->bio->bi_vcnt, blk_rq_bytes(req),
2135 rsp->bio->bi_vcnt, blk_rq_bytes(rsp));
2139 ret = smp_execute_task(dev, bio_data(req->bio), blk_rq_bytes(req),
2140 bio_data(rsp->bio), blk_rq_bytes(rsp));
2142 /* positive number is the untransferred residual */
2143 rsp->resid_len = ret;
2146 } else if (ret == 0) {