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/scsi_transport.h>
32 #include <scsi/scsi_transport_sas.h>
33 #include "../scsi_sas_internal.h"
35 static int sas_discover_expander(struct domain_device *dev);
36 static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr);
37 static int sas_configure_phy(struct domain_device *dev, int phy_id,
38 u8 *sas_addr, int include);
39 static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr);
41 /* ---------- SMP task management ---------- */
43 static void smp_task_timedout(unsigned long _task)
45 struct sas_task *task = (void *) _task;
48 spin_lock_irqsave(&task->task_state_lock, flags);
49 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
50 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
51 spin_unlock_irqrestore(&task->task_state_lock, flags);
53 complete(&task->completion);
56 static void smp_task_done(struct sas_task *task)
58 if (!del_timer(&task->timer))
60 complete(&task->completion);
63 /* Give it some long enough timeout. In seconds. */
64 #define SMP_TIMEOUT 10
66 static int smp_execute_task(struct domain_device *dev, void *req, int req_size,
67 void *resp, int resp_size)
70 struct sas_task *task = NULL;
71 struct sas_internal *i =
72 to_sas_internal(dev->port->ha->core.shost->transportt);
74 for (retry = 0; retry < 3; retry++) {
75 task = sas_alloc_task(GFP_KERNEL);
80 task->task_proto = dev->tproto;
81 sg_init_one(&task->smp_task.smp_req, req, req_size);
82 sg_init_one(&task->smp_task.smp_resp, resp, resp_size);
84 task->task_done = smp_task_done;
86 task->timer.data = (unsigned long) task;
87 task->timer.function = smp_task_timedout;
88 task->timer.expires = jiffies + SMP_TIMEOUT*HZ;
89 add_timer(&task->timer);
91 res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL);
94 del_timer(&task->timer);
95 SAS_DPRINTK("executing SMP task failed:%d\n", res);
99 wait_for_completion(&task->completion);
101 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
102 SAS_DPRINTK("smp task timed out or aborted\n");
103 i->dft->lldd_abort_task(task);
104 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
105 SAS_DPRINTK("SMP task aborted and not done\n");
109 if (task->task_status.resp == SAS_TASK_COMPLETE &&
110 task->task_status.stat == SAM_STAT_GOOD) {
113 } if (task->task_status.resp == SAS_TASK_COMPLETE &&
114 task->task_status.stat == SAS_DATA_UNDERRUN) {
115 /* no error, but return the number of bytes of
117 res = task->task_status.residual;
119 } if (task->task_status.resp == SAS_TASK_COMPLETE &&
120 task->task_status.stat == SAS_DATA_OVERRUN) {
124 SAS_DPRINTK("%s: task to dev %016llx response: 0x%x "
125 "status 0x%x\n", __func__,
126 SAS_ADDR(dev->sas_addr),
127 task->task_status.resp,
128 task->task_status.stat);
134 BUG_ON(retry == 3 && task != NULL);
141 /* ---------- Allocations ---------- */
143 static inline void *alloc_smp_req(int size)
145 u8 *p = kzalloc(size, GFP_KERNEL);
151 static inline void *alloc_smp_resp(int size)
153 return kzalloc(size, GFP_KERNEL);
156 /* ---------- Expander configuration ---------- */
158 static void sas_set_ex_phy(struct domain_device *dev, int phy_id,
161 struct expander_device *ex = &dev->ex_dev;
162 struct ex_phy *phy = &ex->ex_phy[phy_id];
163 struct smp_resp *resp = disc_resp;
164 struct discover_resp *dr = &resp->disc;
165 struct sas_rphy *rphy = dev->rphy;
166 int rediscover = (phy->phy != NULL);
169 phy->phy = sas_phy_alloc(&rphy->dev, phy_id);
171 /* FIXME: error_handling */
175 switch (resp->result) {
176 case SMP_RESP_PHY_VACANT:
177 phy->phy_state = PHY_VACANT;
180 phy->phy_state = PHY_NOT_PRESENT;
182 case SMP_RESP_FUNC_ACC:
183 phy->phy_state = PHY_EMPTY; /* do not know yet */
187 phy->phy_id = phy_id;
188 phy->attached_dev_type = dr->attached_dev_type;
189 phy->linkrate = dr->linkrate;
190 phy->attached_sata_host = dr->attached_sata_host;
191 phy->attached_sata_dev = dr->attached_sata_dev;
192 phy->attached_sata_ps = dr->attached_sata_ps;
193 phy->attached_iproto = dr->iproto << 1;
194 phy->attached_tproto = dr->tproto << 1;
195 memcpy(phy->attached_sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE);
196 phy->attached_phy_id = dr->attached_phy_id;
197 phy->phy_change_count = dr->change_count;
198 phy->routing_attr = dr->routing_attr;
199 phy->virtual = dr->virtual;
200 phy->last_da_index = -1;
202 phy->phy->identify.sas_address = SAS_ADDR(phy->attached_sas_addr);
203 phy->phy->identify.device_type = phy->attached_dev_type;
204 phy->phy->identify.initiator_port_protocols = phy->attached_iproto;
205 phy->phy->identify.target_port_protocols = phy->attached_tproto;
206 phy->phy->identify.phy_identifier = phy_id;
207 phy->phy->minimum_linkrate_hw = dr->hmin_linkrate;
208 phy->phy->maximum_linkrate_hw = dr->hmax_linkrate;
209 phy->phy->minimum_linkrate = dr->pmin_linkrate;
210 phy->phy->maximum_linkrate = dr->pmax_linkrate;
211 phy->phy->negotiated_linkrate = phy->linkrate;
214 if (sas_phy_add(phy->phy)) {
215 sas_phy_free(phy->phy);
219 SAS_DPRINTK("ex %016llx phy%02d:%c attached: %016llx\n",
220 SAS_ADDR(dev->sas_addr), phy->phy_id,
221 phy->routing_attr == TABLE_ROUTING ? 'T' :
222 phy->routing_attr == DIRECT_ROUTING ? 'D' :
223 phy->routing_attr == SUBTRACTIVE_ROUTING ? 'S' : '?',
224 SAS_ADDR(phy->attached_sas_addr));
229 #define DISCOVER_REQ_SIZE 16
230 #define DISCOVER_RESP_SIZE 56
232 static int sas_ex_phy_discover_helper(struct domain_device *dev, u8 *disc_req,
233 u8 *disc_resp, int single)
237 disc_req[9] = single;
238 for (i = 1 ; i < 3; i++) {
239 struct discover_resp *dr;
241 res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE,
242 disc_resp, DISCOVER_RESP_SIZE);
245 /* This is detecting a failure to transmit initial
246 * dev to host FIS as described in section G.5 of
248 dr = &((struct smp_resp *)disc_resp)->disc;
249 if (memcmp(dev->sas_addr, dr->attached_sas_addr,
250 SAS_ADDR_SIZE) == 0) {
251 sas_printk("Found loopback topology, just ignore it!\n");
254 if (!(dr->attached_dev_type == 0 &&
255 dr->attached_sata_dev))
257 /* In order to generate the dev to host FIS, we
258 * send a link reset to the expander port */
259 sas_smp_phy_control(dev, single, PHY_FUNC_LINK_RESET, NULL);
260 /* Wait for the reset to trigger the negotiation */
263 sas_set_ex_phy(dev, single, disc_resp);
267 static int sas_ex_phy_discover(struct domain_device *dev, int single)
269 struct expander_device *ex = &dev->ex_dev;
274 disc_req = alloc_smp_req(DISCOVER_REQ_SIZE);
278 disc_resp = alloc_smp_req(DISCOVER_RESP_SIZE);
284 disc_req[1] = SMP_DISCOVER;
286 if (0 <= single && single < ex->num_phys) {
287 res = sas_ex_phy_discover_helper(dev, disc_req, disc_resp, single);
291 for (i = 0; i < ex->num_phys; i++) {
292 res = sas_ex_phy_discover_helper(dev, disc_req,
304 static int sas_expander_discover(struct domain_device *dev)
306 struct expander_device *ex = &dev->ex_dev;
309 ex->ex_phy = kzalloc(sizeof(*ex->ex_phy)*ex->num_phys, GFP_KERNEL);
313 res = sas_ex_phy_discover(dev, -1);
324 #define MAX_EXPANDER_PHYS 128
326 static void ex_assign_report_general(struct domain_device *dev,
327 struct smp_resp *resp)
329 struct report_general_resp *rg = &resp->rg;
331 dev->ex_dev.ex_change_count = be16_to_cpu(rg->change_count);
332 dev->ex_dev.max_route_indexes = be16_to_cpu(rg->route_indexes);
333 dev->ex_dev.num_phys = min(rg->num_phys, (u8)MAX_EXPANDER_PHYS);
334 dev->ex_dev.t2t_supp = rg->t2t_supp;
335 dev->ex_dev.conf_route_table = rg->conf_route_table;
336 dev->ex_dev.configuring = rg->configuring;
337 memcpy(dev->ex_dev.enclosure_logical_id, rg->enclosure_logical_id, 8);
340 #define RG_REQ_SIZE 8
341 #define RG_RESP_SIZE 32
343 static int sas_ex_general(struct domain_device *dev)
346 struct smp_resp *rg_resp;
350 rg_req = alloc_smp_req(RG_REQ_SIZE);
354 rg_resp = alloc_smp_resp(RG_RESP_SIZE);
360 rg_req[1] = SMP_REPORT_GENERAL;
362 for (i = 0; i < 5; i++) {
363 res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp,
367 SAS_DPRINTK("RG to ex %016llx failed:0x%x\n",
368 SAS_ADDR(dev->sas_addr), res);
370 } else if (rg_resp->result != SMP_RESP_FUNC_ACC) {
371 SAS_DPRINTK("RG:ex %016llx returned SMP result:0x%x\n",
372 SAS_ADDR(dev->sas_addr), rg_resp->result);
373 res = rg_resp->result;
377 ex_assign_report_general(dev, rg_resp);
379 if (dev->ex_dev.configuring) {
380 SAS_DPRINTK("RG: ex %llx self-configuring...\n",
381 SAS_ADDR(dev->sas_addr));
382 schedule_timeout_interruptible(5*HZ);
392 static void ex_assign_manuf_info(struct domain_device *dev, void
395 u8 *mi_resp = _mi_resp;
396 struct sas_rphy *rphy = dev->rphy;
397 struct sas_expander_device *edev = rphy_to_expander_device(rphy);
399 memcpy(edev->vendor_id, mi_resp + 12, SAS_EXPANDER_VENDOR_ID_LEN);
400 memcpy(edev->product_id, mi_resp + 20, SAS_EXPANDER_PRODUCT_ID_LEN);
401 memcpy(edev->product_rev, mi_resp + 36,
402 SAS_EXPANDER_PRODUCT_REV_LEN);
404 if (mi_resp[8] & 1) {
405 memcpy(edev->component_vendor_id, mi_resp + 40,
406 SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN);
407 edev->component_id = mi_resp[48] << 8 | mi_resp[49];
408 edev->component_revision_id = mi_resp[50];
412 #define MI_REQ_SIZE 8
413 #define MI_RESP_SIZE 64
415 static int sas_ex_manuf_info(struct domain_device *dev)
421 mi_req = alloc_smp_req(MI_REQ_SIZE);
425 mi_resp = alloc_smp_resp(MI_RESP_SIZE);
431 mi_req[1] = SMP_REPORT_MANUF_INFO;
433 res = smp_execute_task(dev, mi_req, MI_REQ_SIZE, mi_resp,MI_RESP_SIZE);
435 SAS_DPRINTK("MI: ex %016llx failed:0x%x\n",
436 SAS_ADDR(dev->sas_addr), res);
438 } else if (mi_resp[2] != SMP_RESP_FUNC_ACC) {
439 SAS_DPRINTK("MI ex %016llx returned SMP result:0x%x\n",
440 SAS_ADDR(dev->sas_addr), mi_resp[2]);
444 ex_assign_manuf_info(dev, mi_resp);
451 #define PC_REQ_SIZE 44
452 #define PC_RESP_SIZE 8
454 int sas_smp_phy_control(struct domain_device *dev, int phy_id,
455 enum phy_func phy_func,
456 struct sas_phy_linkrates *rates)
462 pc_req = alloc_smp_req(PC_REQ_SIZE);
466 pc_resp = alloc_smp_resp(PC_RESP_SIZE);
472 pc_req[1] = SMP_PHY_CONTROL;
474 pc_req[10]= phy_func;
476 pc_req[32] = rates->minimum_linkrate << 4;
477 pc_req[33] = rates->maximum_linkrate << 4;
480 res = smp_execute_task(dev, pc_req, PC_REQ_SIZE, pc_resp,PC_RESP_SIZE);
487 static void sas_ex_disable_phy(struct domain_device *dev, int phy_id)
489 struct expander_device *ex = &dev->ex_dev;
490 struct ex_phy *phy = &ex->ex_phy[phy_id];
492 sas_smp_phy_control(dev, phy_id, PHY_FUNC_DISABLE, NULL);
493 phy->linkrate = SAS_PHY_DISABLED;
496 static void sas_ex_disable_port(struct domain_device *dev, u8 *sas_addr)
498 struct expander_device *ex = &dev->ex_dev;
501 for (i = 0; i < ex->num_phys; i++) {
502 struct ex_phy *phy = &ex->ex_phy[i];
504 if (phy->phy_state == PHY_VACANT ||
505 phy->phy_state == PHY_NOT_PRESENT)
508 if (SAS_ADDR(phy->attached_sas_addr) == SAS_ADDR(sas_addr))
509 sas_ex_disable_phy(dev, i);
513 static int sas_dev_present_in_domain(struct asd_sas_port *port,
516 struct domain_device *dev;
518 if (SAS_ADDR(port->sas_addr) == SAS_ADDR(sas_addr))
520 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
521 if (SAS_ADDR(dev->sas_addr) == SAS_ADDR(sas_addr))
527 #define RPEL_REQ_SIZE 16
528 #define RPEL_RESP_SIZE 32
529 int sas_smp_get_phy_events(struct sas_phy *phy)
534 struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent);
535 struct domain_device *dev = sas_find_dev_by_rphy(rphy);
537 req = alloc_smp_req(RPEL_REQ_SIZE);
541 resp = alloc_smp_resp(RPEL_RESP_SIZE);
547 req[1] = SMP_REPORT_PHY_ERR_LOG;
548 req[9] = phy->number;
550 res = smp_execute_task(dev, req, RPEL_REQ_SIZE,
551 resp, RPEL_RESP_SIZE);
556 phy->invalid_dword_count = scsi_to_u32(&resp[12]);
557 phy->running_disparity_error_count = scsi_to_u32(&resp[16]);
558 phy->loss_of_dword_sync_count = scsi_to_u32(&resp[20]);
559 phy->phy_reset_problem_count = scsi_to_u32(&resp[24]);
567 #ifdef CONFIG_SCSI_SAS_ATA
569 #define RPS_REQ_SIZE 16
570 #define RPS_RESP_SIZE 60
572 static int sas_get_report_phy_sata(struct domain_device *dev,
574 struct smp_resp *rps_resp)
577 u8 *rps_req = alloc_smp_req(RPS_REQ_SIZE);
578 u8 *resp = (u8 *)rps_resp;
583 rps_req[1] = SMP_REPORT_PHY_SATA;
586 res = smp_execute_task(dev, rps_req, RPS_REQ_SIZE,
587 rps_resp, RPS_RESP_SIZE);
589 /* 0x34 is the FIS type for the D2H fis. There's a potential
590 * standards cockup here. sas-2 explicitly specifies the FIS
591 * should be encoded so that FIS type is in resp[24].
592 * However, some expanders endian reverse this. Undo the
594 if (!res && resp[27] == 0x34 && resp[24] != 0x34) {
597 for (i = 0; i < 5; i++) {
602 resp[j + 0] = resp[j + 3];
603 resp[j + 1] = resp[j + 2];
614 static void sas_ex_get_linkrate(struct domain_device *parent,
615 struct domain_device *child,
616 struct ex_phy *parent_phy)
618 struct expander_device *parent_ex = &parent->ex_dev;
619 struct sas_port *port;
624 port = parent_phy->port;
626 for (i = 0; i < parent_ex->num_phys; i++) {
627 struct ex_phy *phy = &parent_ex->ex_phy[i];
629 if (phy->phy_state == PHY_VACANT ||
630 phy->phy_state == PHY_NOT_PRESENT)
633 if (SAS_ADDR(phy->attached_sas_addr) ==
634 SAS_ADDR(child->sas_addr)) {
636 child->min_linkrate = min(parent->min_linkrate,
638 child->max_linkrate = max(parent->max_linkrate,
641 sas_port_add_phy(port, phy->phy);
644 child->linkrate = min(parent_phy->linkrate, child->max_linkrate);
645 child->pathways = min(child->pathways, parent->pathways);
648 static struct domain_device *sas_ex_discover_end_dev(
649 struct domain_device *parent, int phy_id)
651 struct expander_device *parent_ex = &parent->ex_dev;
652 struct ex_phy *phy = &parent_ex->ex_phy[phy_id];
653 struct domain_device *child = NULL;
654 struct sas_rphy *rphy;
657 if (phy->attached_sata_host || phy->attached_sata_ps)
660 child = sas_alloc_device();
664 kref_get(&parent->kref);
665 child->parent = parent;
666 child->port = parent->port;
667 child->iproto = phy->attached_iproto;
668 memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
669 sas_hash_addr(child->hashed_sas_addr, child->sas_addr);
671 phy->port = sas_port_alloc(&parent->rphy->dev, phy_id);
672 if (unlikely(!phy->port))
674 if (unlikely(sas_port_add(phy->port) != 0)) {
675 sas_port_free(phy->port);
679 sas_ex_get_linkrate(parent, child, phy);
681 #ifdef CONFIG_SCSI_SAS_ATA
682 if ((phy->attached_tproto & SAS_PROTOCOL_STP) || phy->attached_sata_dev) {
683 child->dev_type = SATA_DEV;
684 if (phy->attached_tproto & SAS_PROTOCOL_STP)
685 child->tproto = phy->attached_tproto;
686 if (phy->attached_sata_dev)
687 child->tproto |= SATA_DEV;
688 res = sas_get_report_phy_sata(parent, phy_id,
689 &child->sata_dev.rps_resp);
691 SAS_DPRINTK("report phy sata to %016llx:0x%x returned "
692 "0x%x\n", SAS_ADDR(parent->sas_addr),
696 memcpy(child->frame_rcvd, &child->sata_dev.rps_resp.rps.fis,
697 sizeof(struct dev_to_host_fis));
699 rphy = sas_end_device_alloc(phy->port);
707 spin_lock_irq(&parent->port->dev_list_lock);
708 list_add_tail(&child->dev_list_node, &parent->port->dev_list);
709 spin_unlock_irq(&parent->port->dev_list_lock);
711 res = sas_discover_sata(child);
713 SAS_DPRINTK("sas_discover_sata() for device %16llx at "
714 "%016llx:0x%x returned 0x%x\n",
715 SAS_ADDR(child->sas_addr),
716 SAS_ADDR(parent->sas_addr), phy_id, res);
721 if (phy->attached_tproto & SAS_PROTOCOL_SSP) {
722 child->dev_type = SAS_END_DEV;
723 rphy = sas_end_device_alloc(phy->port);
724 /* FIXME: error handling */
727 child->tproto = phy->attached_tproto;
731 sas_fill_in_rphy(child, rphy);
733 spin_lock_irq(&parent->port->dev_list_lock);
734 list_add_tail(&child->dev_list_node, &parent->port->dev_list);
735 spin_unlock_irq(&parent->port->dev_list_lock);
737 res = sas_discover_end_dev(child);
739 SAS_DPRINTK("sas_discover_end_dev() for device %16llx "
740 "at %016llx:0x%x returned 0x%x\n",
741 SAS_ADDR(child->sas_addr),
742 SAS_ADDR(parent->sas_addr), phy_id, res);
746 SAS_DPRINTK("target proto 0x%x at %016llx:0x%x not handled\n",
747 phy->attached_tproto, SAS_ADDR(parent->sas_addr),
752 list_add_tail(&child->siblings, &parent_ex->children);
756 sas_rphy_free(child->rphy);
759 spin_lock_irq(&parent->port->dev_list_lock);
760 list_del(&child->dev_list_node);
761 spin_unlock_irq(&parent->port->dev_list_lock);
763 sas_port_delete(phy->port);
766 sas_put_device(child);
770 /* See if this phy is part of a wide port */
771 static int sas_ex_join_wide_port(struct domain_device *parent, int phy_id)
773 struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id];
776 for (i = 0; i < parent->ex_dev.num_phys; i++) {
777 struct ex_phy *ephy = &parent->ex_dev.ex_phy[i];
782 if (!memcmp(phy->attached_sas_addr, ephy->attached_sas_addr,
783 SAS_ADDR_SIZE) && ephy->port) {
784 sas_port_add_phy(ephy->port, phy->phy);
785 phy->port = ephy->port;
786 phy->phy_state = PHY_DEVICE_DISCOVERED;
794 static struct domain_device *sas_ex_discover_expander(
795 struct domain_device *parent, int phy_id)
797 struct sas_expander_device *parent_ex = rphy_to_expander_device(parent->rphy);
798 struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id];
799 struct domain_device *child = NULL;
800 struct sas_rphy *rphy;
801 struct sas_expander_device *edev;
802 struct asd_sas_port *port;
805 if (phy->routing_attr == DIRECT_ROUTING) {
806 SAS_DPRINTK("ex %016llx:0x%x:D <--> ex %016llx:0x%x is not "
808 SAS_ADDR(parent->sas_addr), phy_id,
809 SAS_ADDR(phy->attached_sas_addr),
810 phy->attached_phy_id);
813 child = sas_alloc_device();
817 phy->port = sas_port_alloc(&parent->rphy->dev, phy_id);
818 /* FIXME: better error handling */
819 BUG_ON(sas_port_add(phy->port) != 0);
822 switch (phy->attached_dev_type) {
824 rphy = sas_expander_alloc(phy->port,
825 SAS_EDGE_EXPANDER_DEVICE);
828 rphy = sas_expander_alloc(phy->port,
829 SAS_FANOUT_EXPANDER_DEVICE);
832 rphy = NULL; /* shut gcc up */
837 edev = rphy_to_expander_device(rphy);
838 child->dev_type = phy->attached_dev_type;
839 kref_get(&parent->kref);
840 child->parent = parent;
842 child->iproto = phy->attached_iproto;
843 child->tproto = phy->attached_tproto;
844 memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
845 sas_hash_addr(child->hashed_sas_addr, child->sas_addr);
846 sas_ex_get_linkrate(parent, child, phy);
847 edev->level = parent_ex->level + 1;
848 parent->port->disc.max_level = max(parent->port->disc.max_level,
851 sas_fill_in_rphy(child, rphy);
854 spin_lock_irq(&parent->port->dev_list_lock);
855 list_add_tail(&child->dev_list_node, &parent->port->dev_list);
856 spin_unlock_irq(&parent->port->dev_list_lock);
858 res = sas_discover_expander(child);
860 spin_lock_irq(&parent->port->dev_list_lock);
861 list_del(&child->dev_list_node);
862 spin_unlock_irq(&parent->port->dev_list_lock);
863 sas_put_device(child);
866 list_add_tail(&child->siblings, &parent->ex_dev.children);
870 static int sas_ex_discover_dev(struct domain_device *dev, int phy_id)
872 struct expander_device *ex = &dev->ex_dev;
873 struct ex_phy *ex_phy = &ex->ex_phy[phy_id];
874 struct domain_device *child = NULL;
878 if (ex_phy->linkrate == SAS_SATA_SPINUP_HOLD) {
879 if (!sas_smp_phy_control(dev, phy_id, PHY_FUNC_LINK_RESET, NULL))
880 res = sas_ex_phy_discover(dev, phy_id);
885 /* Parent and domain coherency */
886 if (!dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) ==
887 SAS_ADDR(dev->port->sas_addr))) {
888 sas_add_parent_port(dev, phy_id);
891 if (dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) ==
892 SAS_ADDR(dev->parent->sas_addr))) {
893 sas_add_parent_port(dev, phy_id);
894 if (ex_phy->routing_attr == TABLE_ROUTING)
895 sas_configure_phy(dev, phy_id, dev->port->sas_addr, 1);
899 if (sas_dev_present_in_domain(dev->port, ex_phy->attached_sas_addr))
900 sas_ex_disable_port(dev, ex_phy->attached_sas_addr);
902 if (ex_phy->attached_dev_type == NO_DEVICE) {
903 if (ex_phy->routing_attr == DIRECT_ROUTING) {
904 memset(ex_phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
905 sas_configure_routing(dev, ex_phy->attached_sas_addr);
908 } else if (ex_phy->linkrate == SAS_LINK_RATE_UNKNOWN)
911 if (ex_phy->attached_dev_type != SAS_END_DEV &&
912 ex_phy->attached_dev_type != FANOUT_DEV &&
913 ex_phy->attached_dev_type != EDGE_DEV) {
914 SAS_DPRINTK("unknown device type(0x%x) attached to ex %016llx "
915 "phy 0x%x\n", ex_phy->attached_dev_type,
916 SAS_ADDR(dev->sas_addr),
921 res = sas_configure_routing(dev, ex_phy->attached_sas_addr);
923 SAS_DPRINTK("configure routing for dev %016llx "
924 "reported 0x%x. Forgotten\n",
925 SAS_ADDR(ex_phy->attached_sas_addr), res);
926 sas_disable_routing(dev, ex_phy->attached_sas_addr);
930 res = sas_ex_join_wide_port(dev, phy_id);
932 SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n",
933 phy_id, SAS_ADDR(ex_phy->attached_sas_addr));
937 switch (ex_phy->attached_dev_type) {
939 child = sas_ex_discover_end_dev(dev, phy_id);
942 if (SAS_ADDR(dev->port->disc.fanout_sas_addr)) {
943 SAS_DPRINTK("second fanout expander %016llx phy 0x%x "
944 "attached to ex %016llx phy 0x%x\n",
945 SAS_ADDR(ex_phy->attached_sas_addr),
946 ex_phy->attached_phy_id,
947 SAS_ADDR(dev->sas_addr),
949 sas_ex_disable_phy(dev, phy_id);
952 memcpy(dev->port->disc.fanout_sas_addr,
953 ex_phy->attached_sas_addr, SAS_ADDR_SIZE);
956 child = sas_ex_discover_expander(dev, phy_id);
965 for (i = 0; i < ex->num_phys; i++) {
966 if (ex->ex_phy[i].phy_state == PHY_VACANT ||
967 ex->ex_phy[i].phy_state == PHY_NOT_PRESENT)
970 * Due to races, the phy might not get added to the
971 * wide port, so we add the phy to the wide port here.
973 if (SAS_ADDR(ex->ex_phy[i].attached_sas_addr) ==
974 SAS_ADDR(child->sas_addr)) {
975 ex->ex_phy[i].phy_state= PHY_DEVICE_DISCOVERED;
976 res = sas_ex_join_wide_port(dev, i);
978 SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n",
979 i, SAS_ADDR(ex->ex_phy[i].attached_sas_addr));
988 static int sas_find_sub_addr(struct domain_device *dev, u8 *sub_addr)
990 struct expander_device *ex = &dev->ex_dev;
993 for (i = 0; i < ex->num_phys; i++) {
994 struct ex_phy *phy = &ex->ex_phy[i];
996 if (phy->phy_state == PHY_VACANT ||
997 phy->phy_state == PHY_NOT_PRESENT)
1000 if ((phy->attached_dev_type == EDGE_DEV ||
1001 phy->attached_dev_type == FANOUT_DEV) &&
1002 phy->routing_attr == SUBTRACTIVE_ROUTING) {
1004 memcpy(sub_addr, phy->attached_sas_addr,SAS_ADDR_SIZE);
1012 static int sas_check_level_subtractive_boundary(struct domain_device *dev)
1014 struct expander_device *ex = &dev->ex_dev;
1015 struct domain_device *child;
1016 u8 sub_addr[8] = {0, };
1018 list_for_each_entry(child, &ex->children, siblings) {
1019 if (child->dev_type != EDGE_DEV &&
1020 child->dev_type != FANOUT_DEV)
1022 if (sub_addr[0] == 0) {
1023 sas_find_sub_addr(child, sub_addr);
1028 if (sas_find_sub_addr(child, s2) &&
1029 (SAS_ADDR(sub_addr) != SAS_ADDR(s2))) {
1031 SAS_DPRINTK("ex %016llx->%016llx-?->%016llx "
1032 "diverges from subtractive "
1033 "boundary %016llx\n",
1034 SAS_ADDR(dev->sas_addr),
1035 SAS_ADDR(child->sas_addr),
1037 SAS_ADDR(sub_addr));
1039 sas_ex_disable_port(child, s2);
1046 * sas_ex_discover_devices -- discover devices attached to this expander
1047 * dev: pointer to the expander domain device
1048 * single: if you want to do a single phy, else set to -1;
1050 * Configure this expander for use with its devices and register the
1051 * devices of this expander.
1053 static int sas_ex_discover_devices(struct domain_device *dev, int single)
1055 struct expander_device *ex = &dev->ex_dev;
1056 int i = 0, end = ex->num_phys;
1059 if (0 <= single && single < end) {
1064 for ( ; i < end; i++) {
1065 struct ex_phy *ex_phy = &ex->ex_phy[i];
1067 if (ex_phy->phy_state == PHY_VACANT ||
1068 ex_phy->phy_state == PHY_NOT_PRESENT ||
1069 ex_phy->phy_state == PHY_DEVICE_DISCOVERED)
1072 switch (ex_phy->linkrate) {
1073 case SAS_PHY_DISABLED:
1074 case SAS_PHY_RESET_PROBLEM:
1075 case SAS_SATA_PORT_SELECTOR:
1078 res = sas_ex_discover_dev(dev, i);
1086 sas_check_level_subtractive_boundary(dev);
1091 static int sas_check_ex_subtractive_boundary(struct domain_device *dev)
1093 struct expander_device *ex = &dev->ex_dev;
1095 u8 *sub_sas_addr = NULL;
1097 if (dev->dev_type != EDGE_DEV)
1100 for (i = 0; i < ex->num_phys; i++) {
1101 struct ex_phy *phy = &ex->ex_phy[i];
1103 if (phy->phy_state == PHY_VACANT ||
1104 phy->phy_state == PHY_NOT_PRESENT)
1107 if ((phy->attached_dev_type == FANOUT_DEV ||
1108 phy->attached_dev_type == EDGE_DEV) &&
1109 phy->routing_attr == SUBTRACTIVE_ROUTING) {
1112 sub_sas_addr = &phy->attached_sas_addr[0];
1113 else if (SAS_ADDR(sub_sas_addr) !=
1114 SAS_ADDR(phy->attached_sas_addr)) {
1116 SAS_DPRINTK("ex %016llx phy 0x%x "
1117 "diverges(%016llx) on subtractive "
1118 "boundary(%016llx). Disabled\n",
1119 SAS_ADDR(dev->sas_addr), i,
1120 SAS_ADDR(phy->attached_sas_addr),
1121 SAS_ADDR(sub_sas_addr));
1122 sas_ex_disable_phy(dev, i);
1129 static void sas_print_parent_topology_bug(struct domain_device *child,
1130 struct ex_phy *parent_phy,
1131 struct ex_phy *child_phy)
1133 static const char ra_char[] = {
1134 [DIRECT_ROUTING] = 'D',
1135 [SUBTRACTIVE_ROUTING] = 'S',
1136 [TABLE_ROUTING] = 'T',
1138 static const char *ex_type[] = {
1139 [EDGE_DEV] = "edge",
1140 [FANOUT_DEV] = "fanout",
1142 struct domain_device *parent = child->parent;
1144 sas_printk("%s ex %016llx (T2T supp:%d) phy 0x%x <--> %s ex %016llx "
1145 "(T2T supp:%d) phy 0x%x has %c:%c routing link!\n",
1147 ex_type[parent->dev_type],
1148 SAS_ADDR(parent->sas_addr),
1149 parent->ex_dev.t2t_supp,
1152 ex_type[child->dev_type],
1153 SAS_ADDR(child->sas_addr),
1154 child->ex_dev.t2t_supp,
1157 ra_char[parent_phy->routing_attr],
1158 ra_char[child_phy->routing_attr]);
1161 static int sas_check_eeds(struct domain_device *child,
1162 struct ex_phy *parent_phy,
1163 struct ex_phy *child_phy)
1166 struct domain_device *parent = child->parent;
1168 if (SAS_ADDR(parent->port->disc.fanout_sas_addr) != 0) {
1170 SAS_DPRINTK("edge ex %016llx phy S:0x%x <--> edge ex %016llx "
1171 "phy S:0x%x, while there is a fanout ex %016llx\n",
1172 SAS_ADDR(parent->sas_addr),
1174 SAS_ADDR(child->sas_addr),
1176 SAS_ADDR(parent->port->disc.fanout_sas_addr));
1177 } else if (SAS_ADDR(parent->port->disc.eeds_a) == 0) {
1178 memcpy(parent->port->disc.eeds_a, parent->sas_addr,
1180 memcpy(parent->port->disc.eeds_b, child->sas_addr,
1182 } else if (((SAS_ADDR(parent->port->disc.eeds_a) ==
1183 SAS_ADDR(parent->sas_addr)) ||
1184 (SAS_ADDR(parent->port->disc.eeds_a) ==
1185 SAS_ADDR(child->sas_addr)))
1187 ((SAS_ADDR(parent->port->disc.eeds_b) ==
1188 SAS_ADDR(parent->sas_addr)) ||
1189 (SAS_ADDR(parent->port->disc.eeds_b) ==
1190 SAS_ADDR(child->sas_addr))))
1194 SAS_DPRINTK("edge ex %016llx phy 0x%x <--> edge ex %016llx "
1195 "phy 0x%x link forms a third EEDS!\n",
1196 SAS_ADDR(parent->sas_addr),
1198 SAS_ADDR(child->sas_addr),
1205 /* Here we spill over 80 columns. It is intentional.
1207 static int sas_check_parent_topology(struct domain_device *child)
1209 struct expander_device *child_ex = &child->ex_dev;
1210 struct expander_device *parent_ex;
1217 if (child->parent->dev_type != EDGE_DEV &&
1218 child->parent->dev_type != FANOUT_DEV)
1221 parent_ex = &child->parent->ex_dev;
1223 for (i = 0; i < parent_ex->num_phys; i++) {
1224 struct ex_phy *parent_phy = &parent_ex->ex_phy[i];
1225 struct ex_phy *child_phy;
1227 if (parent_phy->phy_state == PHY_VACANT ||
1228 parent_phy->phy_state == PHY_NOT_PRESENT)
1231 if (SAS_ADDR(parent_phy->attached_sas_addr) != SAS_ADDR(child->sas_addr))
1234 child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id];
1236 switch (child->parent->dev_type) {
1238 if (child->dev_type == FANOUT_DEV) {
1239 if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING ||
1240 child_phy->routing_attr != TABLE_ROUTING) {
1241 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1244 } else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) {
1245 if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) {
1246 res = sas_check_eeds(child, parent_phy, child_phy);
1247 } else if (child_phy->routing_attr != TABLE_ROUTING) {
1248 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1251 } else if (parent_phy->routing_attr == TABLE_ROUTING) {
1252 if (child_phy->routing_attr == SUBTRACTIVE_ROUTING ||
1253 (child_phy->routing_attr == TABLE_ROUTING &&
1254 child_ex->t2t_supp && parent_ex->t2t_supp)) {
1257 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1263 if (parent_phy->routing_attr != TABLE_ROUTING ||
1264 child_phy->routing_attr != SUBTRACTIVE_ROUTING) {
1265 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1277 #define RRI_REQ_SIZE 16
1278 #define RRI_RESP_SIZE 44
1280 static int sas_configure_present(struct domain_device *dev, int phy_id,
1281 u8 *sas_addr, int *index, int *present)
1284 struct expander_device *ex = &dev->ex_dev;
1285 struct ex_phy *phy = &ex->ex_phy[phy_id];
1292 rri_req = alloc_smp_req(RRI_REQ_SIZE);
1296 rri_resp = alloc_smp_resp(RRI_RESP_SIZE);
1302 rri_req[1] = SMP_REPORT_ROUTE_INFO;
1303 rri_req[9] = phy_id;
1305 for (i = 0; i < ex->max_route_indexes ; i++) {
1306 *(__be16 *)(rri_req+6) = cpu_to_be16(i);
1307 res = smp_execute_task(dev, rri_req, RRI_REQ_SIZE, rri_resp,
1312 if (res == SMP_RESP_NO_INDEX) {
1313 SAS_DPRINTK("overflow of indexes: dev %016llx "
1314 "phy 0x%x index 0x%x\n",
1315 SAS_ADDR(dev->sas_addr), phy_id, i);
1317 } else if (res != SMP_RESP_FUNC_ACC) {
1318 SAS_DPRINTK("%s: dev %016llx phy 0x%x index 0x%x "
1319 "result 0x%x\n", __func__,
1320 SAS_ADDR(dev->sas_addr), phy_id, i, res);
1323 if (SAS_ADDR(sas_addr) != 0) {
1324 if (SAS_ADDR(rri_resp+16) == SAS_ADDR(sas_addr)) {
1326 if ((rri_resp[12] & 0x80) == 0x80)
1331 } else if (SAS_ADDR(rri_resp+16) == 0) {
1336 } else if (SAS_ADDR(rri_resp+16) == 0 &&
1337 phy->last_da_index < i) {
1338 phy->last_da_index = i;
1351 #define CRI_REQ_SIZE 44
1352 #define CRI_RESP_SIZE 8
1354 static int sas_configure_set(struct domain_device *dev, int phy_id,
1355 u8 *sas_addr, int index, int include)
1361 cri_req = alloc_smp_req(CRI_REQ_SIZE);
1365 cri_resp = alloc_smp_resp(CRI_RESP_SIZE);
1371 cri_req[1] = SMP_CONF_ROUTE_INFO;
1372 *(__be16 *)(cri_req+6) = cpu_to_be16(index);
1373 cri_req[9] = phy_id;
1374 if (SAS_ADDR(sas_addr) == 0 || !include)
1375 cri_req[12] |= 0x80;
1376 memcpy(cri_req+16, sas_addr, SAS_ADDR_SIZE);
1378 res = smp_execute_task(dev, cri_req, CRI_REQ_SIZE, cri_resp,
1383 if (res == SMP_RESP_NO_INDEX) {
1384 SAS_DPRINTK("overflow of indexes: dev %016llx phy 0x%x "
1386 SAS_ADDR(dev->sas_addr), phy_id, index);
1394 static int sas_configure_phy(struct domain_device *dev, int phy_id,
1395 u8 *sas_addr, int include)
1401 res = sas_configure_present(dev, phy_id, sas_addr, &index, &present);
1404 if (include ^ present)
1405 return sas_configure_set(dev, phy_id, sas_addr, index,include);
1411 * sas_configure_parent -- configure routing table of parent
1412 * parent: parent expander
1413 * child: child expander
1414 * sas_addr: SAS port identifier of device directly attached to child
1416 static int sas_configure_parent(struct domain_device *parent,
1417 struct domain_device *child,
1418 u8 *sas_addr, int include)
1420 struct expander_device *ex_parent = &parent->ex_dev;
1424 if (parent->parent) {
1425 res = sas_configure_parent(parent->parent, parent, sas_addr,
1431 if (ex_parent->conf_route_table == 0) {
1432 SAS_DPRINTK("ex %016llx has self-configuring routing table\n",
1433 SAS_ADDR(parent->sas_addr));
1437 for (i = 0; i < ex_parent->num_phys; i++) {
1438 struct ex_phy *phy = &ex_parent->ex_phy[i];
1440 if ((phy->routing_attr == TABLE_ROUTING) &&
1441 (SAS_ADDR(phy->attached_sas_addr) ==
1442 SAS_ADDR(child->sas_addr))) {
1443 res = sas_configure_phy(parent, i, sas_addr, include);
1453 * sas_configure_routing -- configure routing
1454 * dev: expander device
1455 * sas_addr: port identifier of device directly attached to the expander device
1457 static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr)
1460 return sas_configure_parent(dev->parent, dev, sas_addr, 1);
1464 static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr)
1467 return sas_configure_parent(dev->parent, dev, sas_addr, 0);
1472 * sas_discover_expander -- expander discovery
1473 * @ex: pointer to expander domain device
1475 * See comment in sas_discover_sata().
1477 static int sas_discover_expander(struct domain_device *dev)
1481 res = sas_notify_lldd_dev_found(dev);
1485 res = sas_ex_general(dev);
1488 res = sas_ex_manuf_info(dev);
1492 res = sas_expander_discover(dev);
1494 SAS_DPRINTK("expander %016llx discovery failed(0x%x)\n",
1495 SAS_ADDR(dev->sas_addr), res);
1499 sas_check_ex_subtractive_boundary(dev);
1500 res = sas_check_parent_topology(dev);
1505 sas_notify_lldd_dev_gone(dev);
1509 static int sas_ex_level_discovery(struct asd_sas_port *port, const int level)
1512 struct domain_device *dev;
1514 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
1515 if (dev->dev_type == EDGE_DEV ||
1516 dev->dev_type == FANOUT_DEV) {
1517 struct sas_expander_device *ex =
1518 rphy_to_expander_device(dev->rphy);
1520 if (level == ex->level)
1521 res = sas_ex_discover_devices(dev, -1);
1523 res = sas_ex_discover_devices(port->port_dev, -1);
1531 static int sas_ex_bfs_disc(struct asd_sas_port *port)
1537 level = port->disc.max_level;
1538 res = sas_ex_level_discovery(port, level);
1540 } while (level < port->disc.max_level);
1545 int sas_discover_root_expander(struct domain_device *dev)
1548 struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy);
1550 res = sas_rphy_add(dev->rphy);
1554 ex->level = dev->port->disc.max_level; /* 0 */
1555 res = sas_discover_expander(dev);
1559 sas_ex_bfs_disc(dev->port);
1564 sas_rphy_remove(dev->rphy);
1569 /* ---------- Domain revalidation ---------- */
1571 static int sas_get_phy_discover(struct domain_device *dev,
1572 int phy_id, struct smp_resp *disc_resp)
1577 disc_req = alloc_smp_req(DISCOVER_REQ_SIZE);
1581 disc_req[1] = SMP_DISCOVER;
1582 disc_req[9] = phy_id;
1584 res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE,
1585 disc_resp, DISCOVER_RESP_SIZE);
1588 else if (disc_resp->result != SMP_RESP_FUNC_ACC) {
1589 res = disc_resp->result;
1597 static int sas_get_phy_change_count(struct domain_device *dev,
1598 int phy_id, int *pcc)
1601 struct smp_resp *disc_resp;
1603 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
1607 res = sas_get_phy_discover(dev, phy_id, disc_resp);
1609 *pcc = disc_resp->disc.change_count;
1615 static int sas_get_phy_attached_sas_addr(struct domain_device *dev,
1616 int phy_id, u8 *attached_sas_addr)
1619 struct smp_resp *disc_resp;
1620 struct discover_resp *dr;
1622 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
1625 dr = &disc_resp->disc;
1627 res = sas_get_phy_discover(dev, phy_id, disc_resp);
1629 memcpy(attached_sas_addr,disc_resp->disc.attached_sas_addr,8);
1630 if (dr->attached_dev_type == 0)
1631 memset(attached_sas_addr, 0, 8);
1637 static int sas_find_bcast_phy(struct domain_device *dev, int *phy_id,
1638 int from_phy, bool update)
1640 struct expander_device *ex = &dev->ex_dev;
1644 for (i = from_phy; i < ex->num_phys; i++) {
1645 int phy_change_count = 0;
1647 res = sas_get_phy_change_count(dev, i, &phy_change_count);
1650 else if (phy_change_count != ex->ex_phy[i].phy_change_count) {
1652 ex->ex_phy[i].phy_change_count =
1662 static int sas_get_ex_change_count(struct domain_device *dev, int *ecc)
1666 struct smp_resp *rg_resp;
1668 rg_req = alloc_smp_req(RG_REQ_SIZE);
1672 rg_resp = alloc_smp_resp(RG_RESP_SIZE);
1678 rg_req[1] = SMP_REPORT_GENERAL;
1680 res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp,
1684 if (rg_resp->result != SMP_RESP_FUNC_ACC) {
1685 res = rg_resp->result;
1689 *ecc = be16_to_cpu(rg_resp->rg.change_count);
1696 * sas_find_bcast_dev - find the device issue BROADCAST(CHANGE).
1697 * @dev:domain device to be detect.
1698 * @src_dev: the device which originated BROADCAST(CHANGE).
1700 * Add self-configuration expander suport. Suppose two expander cascading,
1701 * when the first level expander is self-configuring, hotplug the disks in
1702 * second level expander, BROADCAST(CHANGE) will not only be originated
1703 * in the second level expander, but also be originated in the first level
1704 * expander (see SAS protocol SAS 2r-14, 7.11 for detail), it is to say,
1705 * expander changed count in two level expanders will all increment at least
1706 * once, but the phy which chang count has changed is the source device which
1710 static int sas_find_bcast_dev(struct domain_device *dev,
1711 struct domain_device **src_dev)
1713 struct expander_device *ex = &dev->ex_dev;
1714 int ex_change_count = -1;
1717 struct domain_device *ch;
1719 res = sas_get_ex_change_count(dev, &ex_change_count);
1722 if (ex_change_count != -1 && ex_change_count != ex->ex_change_count) {
1723 /* Just detect if this expander phys phy change count changed,
1724 * in order to determine if this expander originate BROADCAST,
1725 * and do not update phy change count field in our structure.
1727 res = sas_find_bcast_phy(dev, &phy_id, 0, false);
1730 ex->ex_change_count = ex_change_count;
1731 SAS_DPRINTK("Expander phy change count has changed\n");
1734 SAS_DPRINTK("Expander phys DID NOT change\n");
1736 list_for_each_entry(ch, &ex->children, siblings) {
1737 if (ch->dev_type == EDGE_DEV || ch->dev_type == FANOUT_DEV) {
1738 res = sas_find_bcast_dev(ch, src_dev);
1747 static void sas_unregister_ex_tree(struct asd_sas_port *port, struct domain_device *dev)
1749 struct expander_device *ex = &dev->ex_dev;
1750 struct domain_device *child, *n;
1752 list_for_each_entry_safe(child, n, &ex->children, siblings) {
1754 if (child->dev_type == EDGE_DEV ||
1755 child->dev_type == FANOUT_DEV)
1756 sas_unregister_ex_tree(port, child);
1758 sas_unregister_dev(port, child);
1760 sas_unregister_dev(port, dev);
1763 static void sas_unregister_devs_sas_addr(struct domain_device *parent,
1764 int phy_id, bool last)
1766 struct expander_device *ex_dev = &parent->ex_dev;
1767 struct ex_phy *phy = &ex_dev->ex_phy[phy_id];
1768 struct domain_device *child, *n;
1770 list_for_each_entry_safe(child, n,
1771 &ex_dev->children, siblings) {
1772 if (SAS_ADDR(child->sas_addr) ==
1773 SAS_ADDR(phy->attached_sas_addr)) {
1775 if (child->dev_type == EDGE_DEV ||
1776 child->dev_type == FANOUT_DEV)
1777 sas_unregister_ex_tree(parent->port, child);
1779 sas_unregister_dev(parent->port, child);
1784 sas_disable_routing(parent, phy->attached_sas_addr);
1786 memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
1788 sas_port_delete_phy(phy->port, phy->phy);
1789 if (phy->port->num_phys == 0)
1790 sas_port_delete(phy->port);
1795 static int sas_discover_bfs_by_root_level(struct domain_device *root,
1798 struct expander_device *ex_root = &root->ex_dev;
1799 struct domain_device *child;
1802 list_for_each_entry(child, &ex_root->children, siblings) {
1803 if (child->dev_type == EDGE_DEV ||
1804 child->dev_type == FANOUT_DEV) {
1805 struct sas_expander_device *ex =
1806 rphy_to_expander_device(child->rphy);
1808 if (level > ex->level)
1809 res = sas_discover_bfs_by_root_level(child,
1811 else if (level == ex->level)
1812 res = sas_ex_discover_devices(child, -1);
1818 static int sas_discover_bfs_by_root(struct domain_device *dev)
1821 struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy);
1822 int level = ex->level+1;
1824 res = sas_ex_discover_devices(dev, -1);
1828 res = sas_discover_bfs_by_root_level(dev, level);
1831 } while (level <= dev->port->disc.max_level);
1836 static int sas_discover_new(struct domain_device *dev, int phy_id)
1838 struct ex_phy *ex_phy = &dev->ex_dev.ex_phy[phy_id];
1839 struct domain_device *child;
1843 SAS_DPRINTK("ex %016llx phy%d new device attached\n",
1844 SAS_ADDR(dev->sas_addr), phy_id);
1845 res = sas_ex_phy_discover(dev, phy_id);
1848 /* to support the wide port inserted */
1849 for (i = 0; i < dev->ex_dev.num_phys; i++) {
1850 struct ex_phy *ex_phy_temp = &dev->ex_dev.ex_phy[i];
1853 if (SAS_ADDR(ex_phy_temp->attached_sas_addr) ==
1854 SAS_ADDR(ex_phy->attached_sas_addr)) {
1860 sas_ex_join_wide_port(dev, phy_id);
1863 res = sas_ex_discover_devices(dev, phy_id);
1866 list_for_each_entry(child, &dev->ex_dev.children, siblings) {
1867 if (SAS_ADDR(child->sas_addr) ==
1868 SAS_ADDR(ex_phy->attached_sas_addr)) {
1869 if (child->dev_type == EDGE_DEV ||
1870 child->dev_type == FANOUT_DEV)
1871 res = sas_discover_bfs_by_root(child);
1879 static int sas_rediscover_dev(struct domain_device *dev, int phy_id, bool last)
1881 struct expander_device *ex = &dev->ex_dev;
1882 struct ex_phy *phy = &ex->ex_phy[phy_id];
1883 u8 attached_sas_addr[8];
1886 res = sas_get_phy_attached_sas_addr(dev, phy_id, attached_sas_addr);
1888 case SMP_RESP_NO_PHY:
1889 phy->phy_state = PHY_NOT_PRESENT;
1890 sas_unregister_devs_sas_addr(dev, phy_id, last);
1892 case SMP_RESP_PHY_VACANT:
1893 phy->phy_state = PHY_VACANT;
1894 sas_unregister_devs_sas_addr(dev, phy_id, last);
1896 case SMP_RESP_FUNC_ACC:
1900 if (SAS_ADDR(attached_sas_addr) == 0) {
1901 phy->phy_state = PHY_EMPTY;
1902 sas_unregister_devs_sas_addr(dev, phy_id, last);
1903 } else if (SAS_ADDR(attached_sas_addr) ==
1904 SAS_ADDR(phy->attached_sas_addr)) {
1905 SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter\n",
1906 SAS_ADDR(dev->sas_addr), phy_id);
1907 sas_ex_phy_discover(dev, phy_id);
1909 res = sas_discover_new(dev, phy_id);
1915 * sas_rediscover - revalidate the domain.
1916 * @dev:domain device to be detect.
1917 * @phy_id: the phy id will be detected.
1919 * NOTE: this process _must_ quit (return) as soon as any connection
1920 * errors are encountered. Connection recovery is done elsewhere.
1921 * Discover process only interrogates devices in order to discover the
1922 * domain.For plugging out, we un-register the device only when it is
1923 * the last phy in the port, for other phys in this port, we just delete it
1924 * from the port.For inserting, we do discovery when it is the
1925 * first phy,for other phys in this port, we add it to the port to
1926 * forming the wide-port.
1928 static int sas_rediscover(struct domain_device *dev, const int phy_id)
1930 struct expander_device *ex = &dev->ex_dev;
1931 struct ex_phy *changed_phy = &ex->ex_phy[phy_id];
1934 bool last = true; /* is this the last phy of the port */
1936 SAS_DPRINTK("ex %016llx phy%d originated BROADCAST(CHANGE)\n",
1937 SAS_ADDR(dev->sas_addr), phy_id);
1939 if (SAS_ADDR(changed_phy->attached_sas_addr) != 0) {
1940 for (i = 0; i < ex->num_phys; i++) {
1941 struct ex_phy *phy = &ex->ex_phy[i];
1945 if (SAS_ADDR(phy->attached_sas_addr) ==
1946 SAS_ADDR(changed_phy->attached_sas_addr)) {
1947 SAS_DPRINTK("phy%d part of wide port with "
1948 "phy%d\n", phy_id, i);
1953 res = sas_rediscover_dev(dev, phy_id, last);
1955 res = sas_discover_new(dev, phy_id);
1960 * sas_revalidate_domain -- revalidate the domain
1961 * @port: port to the domain of interest
1963 * NOTE: this process _must_ quit (return) as soon as any connection
1964 * errors are encountered. Connection recovery is done elsewhere.
1965 * Discover process only interrogates devices in order to discover the
1968 int sas_ex_revalidate_domain(struct domain_device *port_dev)
1971 struct domain_device *dev = NULL;
1973 res = sas_find_bcast_dev(port_dev, &dev);
1977 struct expander_device *ex = &dev->ex_dev;
1982 res = sas_find_bcast_phy(dev, &phy_id, i, true);
1985 res = sas_rediscover(dev, phy_id);
1987 } while (i < ex->num_phys);
1993 int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
1994 struct request *req)
1996 struct domain_device *dev;
1998 struct request *rsp = req->next_rq;
2001 printk("%s: space for a smp response is missing\n",
2006 /* no rphy means no smp target support (ie aic94xx host) */
2008 return sas_smp_host_handler(shost, req, rsp);
2010 type = rphy->identify.device_type;
2012 if (type != SAS_EDGE_EXPANDER_DEVICE &&
2013 type != SAS_FANOUT_EXPANDER_DEVICE) {
2014 printk("%s: can we send a smp request to a device?\n",
2019 dev = sas_find_dev_by_rphy(rphy);
2021 printk("%s: fail to find a domain_device?\n", __func__);
2025 /* do we need to support multiple segments? */
2026 if (req->bio->bi_vcnt > 1 || rsp->bio->bi_vcnt > 1) {
2027 printk("%s: multiple segments req %u %u, rsp %u %u\n",
2028 __func__, req->bio->bi_vcnt, blk_rq_bytes(req),
2029 rsp->bio->bi_vcnt, blk_rq_bytes(rsp));
2033 ret = smp_execute_task(dev, bio_data(req->bio), blk_rq_bytes(req),
2034 bio_data(rsp->bio), blk_rq_bytes(rsp));
2036 /* positive number is the untransferred residual */
2037 rsp->resid_len = ret;
2040 } else if (ret == 0) {