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
.initiator_port_protocols
= phy
->attached_iproto
;
203 phy
->phy
->identify
.target_port_protocols
= phy
->attached_tproto
;
204 phy
->phy
->identify
.phy_identifier
= phy_id
;
205 phy
->phy
->minimum_linkrate_hw
= dr
->hmin_linkrate
;
206 phy
->phy
->maximum_linkrate_hw
= dr
->hmax_linkrate
;
207 phy
->phy
->minimum_linkrate
= dr
->pmin_linkrate
;
208 phy
->phy
->maximum_linkrate
= dr
->pmax_linkrate
;
209 phy
->phy
->negotiated_linkrate
= phy
->linkrate
;
212 if (sas_phy_add(phy
->phy
)) {
213 sas_phy_free(phy
->phy
);
217 SAS_DPRINTK("ex %016llx phy%02d:%c attached: %016llx\n",
218 SAS_ADDR(dev
->sas_addr
), phy
->phy_id
,
219 phy
->routing_attr
== TABLE_ROUTING
? 'T' :
220 phy
->routing_attr
== DIRECT_ROUTING
? 'D' :
221 phy
->routing_attr
== SUBTRACTIVE_ROUTING
? 'S' : '?',
222 SAS_ADDR(phy
->attached_sas_addr
));
227 #define DISCOVER_REQ_SIZE 16
228 #define DISCOVER_RESP_SIZE 56
230 static int sas_ex_phy_discover_helper(struct domain_device
*dev
, u8
*disc_req
,
231 u8
*disc_resp
, int single
)
235 disc_req
[9] = single
;
236 for (i
= 1 ; i
< 3; i
++) {
237 struct discover_resp
*dr
;
239 res
= smp_execute_task(dev
, disc_req
, DISCOVER_REQ_SIZE
,
240 disc_resp
, DISCOVER_RESP_SIZE
);
243 /* This is detecting a failure to transmit inital
244 * dev to host FIS as described in section G.5 of
246 dr
= &((struct smp_resp
*)disc_resp
)->disc
;
247 if (!(dr
->attached_dev_type
== 0 &&
248 dr
->attached_sata_dev
))
250 /* In order to generate the dev to host FIS, we
251 * send a link reset to the expander port */
252 sas_smp_phy_control(dev
, single
, PHY_FUNC_LINK_RESET
, NULL
);
253 /* Wait for the reset to trigger the negotiation */
256 sas_set_ex_phy(dev
, single
, disc_resp
);
260 static int sas_ex_phy_discover(struct domain_device
*dev
, int single
)
262 struct expander_device
*ex
= &dev
->ex_dev
;
267 disc_req
= alloc_smp_req(DISCOVER_REQ_SIZE
);
271 disc_resp
= alloc_smp_req(DISCOVER_RESP_SIZE
);
277 disc_req
[1] = SMP_DISCOVER
;
279 if (0 <= single
&& single
< ex
->num_phys
) {
280 res
= sas_ex_phy_discover_helper(dev
, disc_req
, disc_resp
, single
);
284 for (i
= 0; i
< ex
->num_phys
; i
++) {
285 res
= sas_ex_phy_discover_helper(dev
, disc_req
,
297 static int sas_expander_discover(struct domain_device
*dev
)
299 struct expander_device
*ex
= &dev
->ex_dev
;
302 ex
->ex_phy
= kzalloc(sizeof(*ex
->ex_phy
)*ex
->num_phys
, GFP_KERNEL
);
306 res
= sas_ex_phy_discover(dev
, -1);
317 #define MAX_EXPANDER_PHYS 128
319 static void ex_assign_report_general(struct domain_device
*dev
,
320 struct smp_resp
*resp
)
322 struct report_general_resp
*rg
= &resp
->rg
;
324 dev
->ex_dev
.ex_change_count
= be16_to_cpu(rg
->change_count
);
325 dev
->ex_dev
.max_route_indexes
= be16_to_cpu(rg
->route_indexes
);
326 dev
->ex_dev
.num_phys
= min(rg
->num_phys
, (u8
)MAX_EXPANDER_PHYS
);
327 dev
->ex_dev
.conf_route_table
= rg
->conf_route_table
;
328 dev
->ex_dev
.configuring
= rg
->configuring
;
329 memcpy(dev
->ex_dev
.enclosure_logical_id
, rg
->enclosure_logical_id
, 8);
332 #define RG_REQ_SIZE 8
333 #define RG_RESP_SIZE 32
335 static int sas_ex_general(struct domain_device
*dev
)
338 struct smp_resp
*rg_resp
;
342 rg_req
= alloc_smp_req(RG_REQ_SIZE
);
346 rg_resp
= alloc_smp_resp(RG_RESP_SIZE
);
352 rg_req
[1] = SMP_REPORT_GENERAL
;
354 for (i
= 0; i
< 5; i
++) {
355 res
= smp_execute_task(dev
, rg_req
, RG_REQ_SIZE
, rg_resp
,
359 SAS_DPRINTK("RG to ex %016llx failed:0x%x\n",
360 SAS_ADDR(dev
->sas_addr
), res
);
362 } else if (rg_resp
->result
!= SMP_RESP_FUNC_ACC
) {
363 SAS_DPRINTK("RG:ex %016llx returned SMP result:0x%x\n",
364 SAS_ADDR(dev
->sas_addr
), rg_resp
->result
);
365 res
= rg_resp
->result
;
369 ex_assign_report_general(dev
, rg_resp
);
371 if (dev
->ex_dev
.configuring
) {
372 SAS_DPRINTK("RG: ex %llx self-configuring...\n",
373 SAS_ADDR(dev
->sas_addr
));
374 schedule_timeout_interruptible(5*HZ
);
384 static void ex_assign_manuf_info(struct domain_device
*dev
, void
387 u8
*mi_resp
= _mi_resp
;
388 struct sas_rphy
*rphy
= dev
->rphy
;
389 struct sas_expander_device
*edev
= rphy_to_expander_device(rphy
);
391 memcpy(edev
->vendor_id
, mi_resp
+ 12, SAS_EXPANDER_VENDOR_ID_LEN
);
392 memcpy(edev
->product_id
, mi_resp
+ 20, SAS_EXPANDER_PRODUCT_ID_LEN
);
393 memcpy(edev
->product_rev
, mi_resp
+ 36,
394 SAS_EXPANDER_PRODUCT_REV_LEN
);
396 if (mi_resp
[8] & 1) {
397 memcpy(edev
->component_vendor_id
, mi_resp
+ 40,
398 SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN
);
399 edev
->component_id
= mi_resp
[48] << 8 | mi_resp
[49];
400 edev
->component_revision_id
= mi_resp
[50];
404 #define MI_REQ_SIZE 8
405 #define MI_RESP_SIZE 64
407 static int sas_ex_manuf_info(struct domain_device
*dev
)
413 mi_req
= alloc_smp_req(MI_REQ_SIZE
);
417 mi_resp
= alloc_smp_resp(MI_RESP_SIZE
);
423 mi_req
[1] = SMP_REPORT_MANUF_INFO
;
425 res
= smp_execute_task(dev
, mi_req
, MI_REQ_SIZE
, mi_resp
,MI_RESP_SIZE
);
427 SAS_DPRINTK("MI: ex %016llx failed:0x%x\n",
428 SAS_ADDR(dev
->sas_addr
), res
);
430 } else if (mi_resp
[2] != SMP_RESP_FUNC_ACC
) {
431 SAS_DPRINTK("MI ex %016llx returned SMP result:0x%x\n",
432 SAS_ADDR(dev
->sas_addr
), mi_resp
[2]);
436 ex_assign_manuf_info(dev
, mi_resp
);
443 #define PC_REQ_SIZE 44
444 #define PC_RESP_SIZE 8
446 int sas_smp_phy_control(struct domain_device
*dev
, int phy_id
,
447 enum phy_func phy_func
,
448 struct sas_phy_linkrates
*rates
)
454 pc_req
= alloc_smp_req(PC_REQ_SIZE
);
458 pc_resp
= alloc_smp_resp(PC_RESP_SIZE
);
464 pc_req
[1] = SMP_PHY_CONTROL
;
466 pc_req
[10]= phy_func
;
468 pc_req
[32] = rates
->minimum_linkrate
<< 4;
469 pc_req
[33] = rates
->maximum_linkrate
<< 4;
472 res
= smp_execute_task(dev
, pc_req
, PC_REQ_SIZE
, pc_resp
,PC_RESP_SIZE
);
479 static void sas_ex_disable_phy(struct domain_device
*dev
, int phy_id
)
481 struct expander_device
*ex
= &dev
->ex_dev
;
482 struct ex_phy
*phy
= &ex
->ex_phy
[phy_id
];
484 sas_smp_phy_control(dev
, phy_id
, PHY_FUNC_DISABLE
, NULL
);
485 phy
->linkrate
= SAS_PHY_DISABLED
;
488 static void sas_ex_disable_port(struct domain_device
*dev
, u8
*sas_addr
)
490 struct expander_device
*ex
= &dev
->ex_dev
;
493 for (i
= 0; i
< ex
->num_phys
; i
++) {
494 struct ex_phy
*phy
= &ex
->ex_phy
[i
];
496 if (phy
->phy_state
== PHY_VACANT
||
497 phy
->phy_state
== PHY_NOT_PRESENT
)
500 if (SAS_ADDR(phy
->attached_sas_addr
) == SAS_ADDR(sas_addr
))
501 sas_ex_disable_phy(dev
, i
);
505 static int sas_dev_present_in_domain(struct asd_sas_port
*port
,
508 struct domain_device
*dev
;
510 if (SAS_ADDR(port
->sas_addr
) == SAS_ADDR(sas_addr
))
512 list_for_each_entry(dev
, &port
->dev_list
, dev_list_node
) {
513 if (SAS_ADDR(dev
->sas_addr
) == SAS_ADDR(sas_addr
))
519 #define RPEL_REQ_SIZE 16
520 #define RPEL_RESP_SIZE 32
521 int sas_smp_get_phy_events(struct sas_phy
*phy
)
526 struct sas_rphy
*rphy
= dev_to_rphy(phy
->dev
.parent
);
527 struct domain_device
*dev
= sas_find_dev_by_rphy(rphy
);
529 req
= alloc_smp_req(RPEL_REQ_SIZE
);
533 resp
= alloc_smp_resp(RPEL_RESP_SIZE
);
539 req
[1] = SMP_REPORT_PHY_ERR_LOG
;
540 req
[9] = phy
->number
;
542 res
= smp_execute_task(dev
, req
, RPEL_REQ_SIZE
,
543 resp
, RPEL_RESP_SIZE
);
548 phy
->invalid_dword_count
= scsi_to_u32(&resp
[12]);
549 phy
->running_disparity_error_count
= scsi_to_u32(&resp
[16]);
550 phy
->loss_of_dword_sync_count
= scsi_to_u32(&resp
[20]);
551 phy
->phy_reset_problem_count
= scsi_to_u32(&resp
[24]);
559 #ifdef CONFIG_SCSI_SAS_ATA
561 #define RPS_REQ_SIZE 16
562 #define RPS_RESP_SIZE 60
564 static int sas_get_report_phy_sata(struct domain_device
*dev
,
566 struct smp_resp
*rps_resp
)
569 u8
*rps_req
= alloc_smp_req(RPS_REQ_SIZE
);
570 u8
*resp
= (u8
*)rps_resp
;
575 rps_req
[1] = SMP_REPORT_PHY_SATA
;
578 res
= smp_execute_task(dev
, rps_req
, RPS_REQ_SIZE
,
579 rps_resp
, RPS_RESP_SIZE
);
581 /* 0x34 is the FIS type for the D2H fis. There's a potential
582 * standards cockup here. sas-2 explicitly specifies the FIS
583 * should be encoded so that FIS type is in resp[24].
584 * However, some expanders endian reverse this. Undo the
586 if (!res
&& resp
[27] == 0x34 && resp
[24] != 0x34) {
589 for (i
= 0; i
< 5; i
++) {
594 resp
[j
+ 0] = resp
[j
+ 3];
595 resp
[j
+ 1] = resp
[j
+ 2];
606 static void sas_ex_get_linkrate(struct domain_device
*parent
,
607 struct domain_device
*child
,
608 struct ex_phy
*parent_phy
)
610 struct expander_device
*parent_ex
= &parent
->ex_dev
;
611 struct sas_port
*port
;
616 port
= parent_phy
->port
;
618 for (i
= 0; i
< parent_ex
->num_phys
; i
++) {
619 struct ex_phy
*phy
= &parent_ex
->ex_phy
[i
];
621 if (phy
->phy_state
== PHY_VACANT
||
622 phy
->phy_state
== PHY_NOT_PRESENT
)
625 if (SAS_ADDR(phy
->attached_sas_addr
) ==
626 SAS_ADDR(child
->sas_addr
)) {
628 child
->min_linkrate
= min(parent
->min_linkrate
,
630 child
->max_linkrate
= max(parent
->max_linkrate
,
633 sas_port_add_phy(port
, phy
->phy
);
636 child
->linkrate
= min(parent_phy
->linkrate
, child
->max_linkrate
);
637 child
->pathways
= min(child
->pathways
, parent
->pathways
);
640 static struct domain_device
*sas_ex_discover_end_dev(
641 struct domain_device
*parent
, int phy_id
)
643 struct expander_device
*parent_ex
= &parent
->ex_dev
;
644 struct ex_phy
*phy
= &parent_ex
->ex_phy
[phy_id
];
645 struct domain_device
*child
= NULL
;
646 struct sas_rphy
*rphy
;
649 if (phy
->attached_sata_host
|| phy
->attached_sata_ps
)
652 child
= kzalloc(sizeof(*child
), GFP_KERNEL
);
656 child
->parent
= parent
;
657 child
->port
= parent
->port
;
658 child
->iproto
= phy
->attached_iproto
;
659 memcpy(child
->sas_addr
, phy
->attached_sas_addr
, SAS_ADDR_SIZE
);
660 sas_hash_addr(child
->hashed_sas_addr
, child
->sas_addr
);
662 phy
->port
= sas_port_alloc(&parent
->rphy
->dev
, phy_id
);
663 if (unlikely(!phy
->port
))
665 if (unlikely(sas_port_add(phy
->port
) != 0)) {
666 sas_port_free(phy
->port
);
670 sas_ex_get_linkrate(parent
, child
, phy
);
672 #ifdef CONFIG_SCSI_SAS_ATA
673 if ((phy
->attached_tproto
& SAS_PROTOCOL_STP
) || phy
->attached_sata_dev
) {
674 child
->dev_type
= SATA_DEV
;
675 if (phy
->attached_tproto
& SAS_PROTOCOL_STP
)
676 child
->tproto
= phy
->attached_tproto
;
677 if (phy
->attached_sata_dev
)
678 child
->tproto
|= SATA_DEV
;
679 res
= sas_get_report_phy_sata(parent
, phy_id
,
680 &child
->sata_dev
.rps_resp
);
682 SAS_DPRINTK("report phy sata to %016llx:0x%x returned "
683 "0x%x\n", SAS_ADDR(parent
->sas_addr
),
687 memcpy(child
->frame_rcvd
, &child
->sata_dev
.rps_resp
.rps
.fis
,
688 sizeof(struct dev_to_host_fis
));
690 rphy
= sas_end_device_alloc(phy
->port
);
698 spin_lock_irq(&parent
->port
->dev_list_lock
);
699 list_add_tail(&child
->dev_list_node
, &parent
->port
->dev_list
);
700 spin_unlock_irq(&parent
->port
->dev_list_lock
);
702 res
= sas_discover_sata(child
);
704 SAS_DPRINTK("sas_discover_sata() for device %16llx at "
705 "%016llx:0x%x returned 0x%x\n",
706 SAS_ADDR(child
->sas_addr
),
707 SAS_ADDR(parent
->sas_addr
), phy_id
, res
);
712 if (phy
->attached_tproto
& SAS_PROTOCOL_SSP
) {
713 child
->dev_type
= SAS_END_DEV
;
714 rphy
= sas_end_device_alloc(phy
->port
);
715 /* FIXME: error handling */
718 child
->tproto
= phy
->attached_tproto
;
722 sas_fill_in_rphy(child
, rphy
);
724 spin_lock_irq(&parent
->port
->dev_list_lock
);
725 list_add_tail(&child
->dev_list_node
, &parent
->port
->dev_list
);
726 spin_unlock_irq(&parent
->port
->dev_list_lock
);
728 res
= sas_discover_end_dev(child
);
730 SAS_DPRINTK("sas_discover_end_dev() for device %16llx "
731 "at %016llx:0x%x returned 0x%x\n",
732 SAS_ADDR(child
->sas_addr
),
733 SAS_ADDR(parent
->sas_addr
), phy_id
, res
);
737 SAS_DPRINTK("target proto 0x%x at %016llx:0x%x not handled\n",
738 phy
->attached_tproto
, SAS_ADDR(parent
->sas_addr
),
743 list_add_tail(&child
->siblings
, &parent_ex
->children
);
747 sas_rphy_free(child
->rphy
);
749 list_del(&child
->dev_list_node
);
751 sas_port_delete(phy
->port
);
758 /* See if this phy is part of a wide port */
759 static int sas_ex_join_wide_port(struct domain_device
*parent
, int phy_id
)
761 struct ex_phy
*phy
= &parent
->ex_dev
.ex_phy
[phy_id
];
764 for (i
= 0; i
< parent
->ex_dev
.num_phys
; i
++) {
765 struct ex_phy
*ephy
= &parent
->ex_dev
.ex_phy
[i
];
770 if (!memcmp(phy
->attached_sas_addr
, ephy
->attached_sas_addr
,
771 SAS_ADDR_SIZE
) && ephy
->port
) {
772 sas_port_add_phy(ephy
->port
, phy
->phy
);
773 phy
->port
= ephy
->port
;
774 phy
->phy_state
= PHY_DEVICE_DISCOVERED
;
782 static struct domain_device
*sas_ex_discover_expander(
783 struct domain_device
*parent
, int phy_id
)
785 struct sas_expander_device
*parent_ex
= rphy_to_expander_device(parent
->rphy
);
786 struct ex_phy
*phy
= &parent
->ex_dev
.ex_phy
[phy_id
];
787 struct domain_device
*child
= NULL
;
788 struct sas_rphy
*rphy
;
789 struct sas_expander_device
*edev
;
790 struct asd_sas_port
*port
;
793 if (phy
->routing_attr
== DIRECT_ROUTING
) {
794 SAS_DPRINTK("ex %016llx:0x%x:D <--> ex %016llx:0x%x is not "
796 SAS_ADDR(parent
->sas_addr
), phy_id
,
797 SAS_ADDR(phy
->attached_sas_addr
),
798 phy
->attached_phy_id
);
801 child
= kzalloc(sizeof(*child
), GFP_KERNEL
);
805 phy
->port
= sas_port_alloc(&parent
->rphy
->dev
, phy_id
);
806 /* FIXME: better error handling */
807 BUG_ON(sas_port_add(phy
->port
) != 0);
810 switch (phy
->attached_dev_type
) {
812 rphy
= sas_expander_alloc(phy
->port
,
813 SAS_EDGE_EXPANDER_DEVICE
);
816 rphy
= sas_expander_alloc(phy
->port
,
817 SAS_FANOUT_EXPANDER_DEVICE
);
820 rphy
= NULL
; /* shut gcc up */
825 edev
= rphy_to_expander_device(rphy
);
826 child
->dev_type
= phy
->attached_dev_type
;
827 child
->parent
= parent
;
829 child
->iproto
= phy
->attached_iproto
;
830 child
->tproto
= phy
->attached_tproto
;
831 memcpy(child
->sas_addr
, phy
->attached_sas_addr
, SAS_ADDR_SIZE
);
832 sas_hash_addr(child
->hashed_sas_addr
, child
->sas_addr
);
833 sas_ex_get_linkrate(parent
, child
, phy
);
834 edev
->level
= parent_ex
->level
+ 1;
835 parent
->port
->disc
.max_level
= max(parent
->port
->disc
.max_level
,
838 sas_fill_in_rphy(child
, rphy
);
841 spin_lock_irq(&parent
->port
->dev_list_lock
);
842 list_add_tail(&child
->dev_list_node
, &parent
->port
->dev_list
);
843 spin_unlock_irq(&parent
->port
->dev_list_lock
);
845 res
= sas_discover_expander(child
);
850 list_add_tail(&child
->siblings
, &parent
->ex_dev
.children
);
854 static int sas_ex_discover_dev(struct domain_device
*dev
, int phy_id
)
856 struct expander_device
*ex
= &dev
->ex_dev
;
857 struct ex_phy
*ex_phy
= &ex
->ex_phy
[phy_id
];
858 struct domain_device
*child
= NULL
;
862 if (ex_phy
->linkrate
== SAS_SATA_SPINUP_HOLD
) {
863 if (!sas_smp_phy_control(dev
, phy_id
, PHY_FUNC_LINK_RESET
, NULL
))
864 res
= sas_ex_phy_discover(dev
, phy_id
);
869 /* Parent and domain coherency */
870 if (!dev
->parent
&& (SAS_ADDR(ex_phy
->attached_sas_addr
) ==
871 SAS_ADDR(dev
->port
->sas_addr
))) {
872 sas_add_parent_port(dev
, phy_id
);
875 if (dev
->parent
&& (SAS_ADDR(ex_phy
->attached_sas_addr
) ==
876 SAS_ADDR(dev
->parent
->sas_addr
))) {
877 sas_add_parent_port(dev
, phy_id
);
878 if (ex_phy
->routing_attr
== TABLE_ROUTING
)
879 sas_configure_phy(dev
, phy_id
, dev
->port
->sas_addr
, 1);
883 if (sas_dev_present_in_domain(dev
->port
, ex_phy
->attached_sas_addr
))
884 sas_ex_disable_port(dev
, ex_phy
->attached_sas_addr
);
886 if (ex_phy
->attached_dev_type
== NO_DEVICE
) {
887 if (ex_phy
->routing_attr
== DIRECT_ROUTING
) {
888 memset(ex_phy
->attached_sas_addr
, 0, SAS_ADDR_SIZE
);
889 sas_configure_routing(dev
, ex_phy
->attached_sas_addr
);
892 } else if (ex_phy
->linkrate
== SAS_LINK_RATE_UNKNOWN
)
895 if (ex_phy
->attached_dev_type
!= SAS_END_DEV
&&
896 ex_phy
->attached_dev_type
!= FANOUT_DEV
&&
897 ex_phy
->attached_dev_type
!= EDGE_DEV
) {
898 SAS_DPRINTK("unknown device type(0x%x) attached to ex %016llx "
899 "phy 0x%x\n", ex_phy
->attached_dev_type
,
900 SAS_ADDR(dev
->sas_addr
),
905 res
= sas_configure_routing(dev
, ex_phy
->attached_sas_addr
);
907 SAS_DPRINTK("configure routing for dev %016llx "
908 "reported 0x%x. Forgotten\n",
909 SAS_ADDR(ex_phy
->attached_sas_addr
), res
);
910 sas_disable_routing(dev
, ex_phy
->attached_sas_addr
);
914 res
= sas_ex_join_wide_port(dev
, phy_id
);
916 SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n",
917 phy_id
, SAS_ADDR(ex_phy
->attached_sas_addr
));
921 switch (ex_phy
->attached_dev_type
) {
923 child
= sas_ex_discover_end_dev(dev
, phy_id
);
926 if (SAS_ADDR(dev
->port
->disc
.fanout_sas_addr
)) {
927 SAS_DPRINTK("second fanout expander %016llx phy 0x%x "
928 "attached to ex %016llx phy 0x%x\n",
929 SAS_ADDR(ex_phy
->attached_sas_addr
),
930 ex_phy
->attached_phy_id
,
931 SAS_ADDR(dev
->sas_addr
),
933 sas_ex_disable_phy(dev
, phy_id
);
936 memcpy(dev
->port
->disc
.fanout_sas_addr
,
937 ex_phy
->attached_sas_addr
, SAS_ADDR_SIZE
);
940 child
= sas_ex_discover_expander(dev
, phy_id
);
949 for (i
= 0; i
< ex
->num_phys
; i
++) {
950 if (ex
->ex_phy
[i
].phy_state
== PHY_VACANT
||
951 ex
->ex_phy
[i
].phy_state
== PHY_NOT_PRESENT
)
954 * Due to races, the phy might not get added to the
955 * wide port, so we add the phy to the wide port here.
957 if (SAS_ADDR(ex
->ex_phy
[i
].attached_sas_addr
) ==
958 SAS_ADDR(child
->sas_addr
)) {
959 ex
->ex_phy
[i
].phy_state
= PHY_DEVICE_DISCOVERED
;
960 res
= sas_ex_join_wide_port(dev
, i
);
962 SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n",
963 i
, SAS_ADDR(ex
->ex_phy
[i
].attached_sas_addr
));
972 static int sas_find_sub_addr(struct domain_device
*dev
, u8
*sub_addr
)
974 struct expander_device
*ex
= &dev
->ex_dev
;
977 for (i
= 0; i
< ex
->num_phys
; i
++) {
978 struct ex_phy
*phy
= &ex
->ex_phy
[i
];
980 if (phy
->phy_state
== PHY_VACANT
||
981 phy
->phy_state
== PHY_NOT_PRESENT
)
984 if ((phy
->attached_dev_type
== EDGE_DEV
||
985 phy
->attached_dev_type
== FANOUT_DEV
) &&
986 phy
->routing_attr
== SUBTRACTIVE_ROUTING
) {
988 memcpy(sub_addr
, phy
->attached_sas_addr
,SAS_ADDR_SIZE
);
996 static int sas_check_level_subtractive_boundary(struct domain_device
*dev
)
998 struct expander_device
*ex
= &dev
->ex_dev
;
999 struct domain_device
*child
;
1000 u8 sub_addr
[8] = {0, };
1002 list_for_each_entry(child
, &ex
->children
, siblings
) {
1003 if (child
->dev_type
!= EDGE_DEV
&&
1004 child
->dev_type
!= FANOUT_DEV
)
1006 if (sub_addr
[0] == 0) {
1007 sas_find_sub_addr(child
, sub_addr
);
1012 if (sas_find_sub_addr(child
, s2
) &&
1013 (SAS_ADDR(sub_addr
) != SAS_ADDR(s2
))) {
1015 SAS_DPRINTK("ex %016llx->%016llx-?->%016llx "
1016 "diverges from subtractive "
1017 "boundary %016llx\n",
1018 SAS_ADDR(dev
->sas_addr
),
1019 SAS_ADDR(child
->sas_addr
),
1021 SAS_ADDR(sub_addr
));
1023 sas_ex_disable_port(child
, s2
);
1030 * sas_ex_discover_devices -- discover devices attached to this expander
1031 * dev: pointer to the expander domain device
1032 * single: if you want to do a single phy, else set to -1;
1034 * Configure this expander for use with its devices and register the
1035 * devices of this expander.
1037 static int sas_ex_discover_devices(struct domain_device
*dev
, int single
)
1039 struct expander_device
*ex
= &dev
->ex_dev
;
1040 int i
= 0, end
= ex
->num_phys
;
1043 if (0 <= single
&& single
< end
) {
1048 for ( ; i
< end
; i
++) {
1049 struct ex_phy
*ex_phy
= &ex
->ex_phy
[i
];
1051 if (ex_phy
->phy_state
== PHY_VACANT
||
1052 ex_phy
->phy_state
== PHY_NOT_PRESENT
||
1053 ex_phy
->phy_state
== PHY_DEVICE_DISCOVERED
)
1056 switch (ex_phy
->linkrate
) {
1057 case SAS_PHY_DISABLED
:
1058 case SAS_PHY_RESET_PROBLEM
:
1059 case SAS_SATA_PORT_SELECTOR
:
1062 res
= sas_ex_discover_dev(dev
, i
);
1070 sas_check_level_subtractive_boundary(dev
);
1075 static int sas_check_ex_subtractive_boundary(struct domain_device
*dev
)
1077 struct expander_device
*ex
= &dev
->ex_dev
;
1079 u8
*sub_sas_addr
= NULL
;
1081 if (dev
->dev_type
!= EDGE_DEV
)
1084 for (i
= 0; i
< ex
->num_phys
; i
++) {
1085 struct ex_phy
*phy
= &ex
->ex_phy
[i
];
1087 if (phy
->phy_state
== PHY_VACANT
||
1088 phy
->phy_state
== PHY_NOT_PRESENT
)
1091 if ((phy
->attached_dev_type
== FANOUT_DEV
||
1092 phy
->attached_dev_type
== EDGE_DEV
) &&
1093 phy
->routing_attr
== SUBTRACTIVE_ROUTING
) {
1096 sub_sas_addr
= &phy
->attached_sas_addr
[0];
1097 else if (SAS_ADDR(sub_sas_addr
) !=
1098 SAS_ADDR(phy
->attached_sas_addr
)) {
1100 SAS_DPRINTK("ex %016llx phy 0x%x "
1101 "diverges(%016llx) on subtractive "
1102 "boundary(%016llx). Disabled\n",
1103 SAS_ADDR(dev
->sas_addr
), i
,
1104 SAS_ADDR(phy
->attached_sas_addr
),
1105 SAS_ADDR(sub_sas_addr
));
1106 sas_ex_disable_phy(dev
, i
);
1113 static void sas_print_parent_topology_bug(struct domain_device
*child
,
1114 struct ex_phy
*parent_phy
,
1115 struct ex_phy
*child_phy
)
1117 static const char ra_char
[] = {
1118 [DIRECT_ROUTING
] = 'D',
1119 [SUBTRACTIVE_ROUTING
] = 'S',
1120 [TABLE_ROUTING
] = 'T',
1122 static const char *ex_type
[] = {
1123 [EDGE_DEV
] = "edge",
1124 [FANOUT_DEV
] = "fanout",
1126 struct domain_device
*parent
= child
->parent
;
1128 sas_printk("%s ex %016llx phy 0x%x <--> %s ex %016llx phy 0x%x "
1129 "has %c:%c routing link!\n",
1131 ex_type
[parent
->dev_type
],
1132 SAS_ADDR(parent
->sas_addr
),
1135 ex_type
[child
->dev_type
],
1136 SAS_ADDR(child
->sas_addr
),
1139 ra_char
[parent_phy
->routing_attr
],
1140 ra_char
[child_phy
->routing_attr
]);
1143 static int sas_check_eeds(struct domain_device
*child
,
1144 struct ex_phy
*parent_phy
,
1145 struct ex_phy
*child_phy
)
1148 struct domain_device
*parent
= child
->parent
;
1150 if (SAS_ADDR(parent
->port
->disc
.fanout_sas_addr
) != 0) {
1152 SAS_DPRINTK("edge ex %016llx phy S:0x%x <--> edge ex %016llx "
1153 "phy S:0x%x, while there is a fanout ex %016llx\n",
1154 SAS_ADDR(parent
->sas_addr
),
1156 SAS_ADDR(child
->sas_addr
),
1158 SAS_ADDR(parent
->port
->disc
.fanout_sas_addr
));
1159 } else if (SAS_ADDR(parent
->port
->disc
.eeds_a
) == 0) {
1160 memcpy(parent
->port
->disc
.eeds_a
, parent
->sas_addr
,
1162 memcpy(parent
->port
->disc
.eeds_b
, child
->sas_addr
,
1164 } else if (((SAS_ADDR(parent
->port
->disc
.eeds_a
) ==
1165 SAS_ADDR(parent
->sas_addr
)) ||
1166 (SAS_ADDR(parent
->port
->disc
.eeds_a
) ==
1167 SAS_ADDR(child
->sas_addr
)))
1169 ((SAS_ADDR(parent
->port
->disc
.eeds_b
) ==
1170 SAS_ADDR(parent
->sas_addr
)) ||
1171 (SAS_ADDR(parent
->port
->disc
.eeds_b
) ==
1172 SAS_ADDR(child
->sas_addr
))))
1176 SAS_DPRINTK("edge ex %016llx phy 0x%x <--> edge ex %016llx "
1177 "phy 0x%x link forms a third EEDS!\n",
1178 SAS_ADDR(parent
->sas_addr
),
1180 SAS_ADDR(child
->sas_addr
),
1187 /* Here we spill over 80 columns. It is intentional.
1189 static int sas_check_parent_topology(struct domain_device
*child
)
1191 struct expander_device
*child_ex
= &child
->ex_dev
;
1192 struct expander_device
*parent_ex
;
1199 if (child
->parent
->dev_type
!= EDGE_DEV
&&
1200 child
->parent
->dev_type
!= FANOUT_DEV
)
1203 parent_ex
= &child
->parent
->ex_dev
;
1205 for (i
= 0; i
< parent_ex
->num_phys
; i
++) {
1206 struct ex_phy
*parent_phy
= &parent_ex
->ex_phy
[i
];
1207 struct ex_phy
*child_phy
;
1209 if (parent_phy
->phy_state
== PHY_VACANT
||
1210 parent_phy
->phy_state
== PHY_NOT_PRESENT
)
1213 if (SAS_ADDR(parent_phy
->attached_sas_addr
) != SAS_ADDR(child
->sas_addr
))
1216 child_phy
= &child_ex
->ex_phy
[parent_phy
->attached_phy_id
];
1218 switch (child
->parent
->dev_type
) {
1220 if (child
->dev_type
== FANOUT_DEV
) {
1221 if (parent_phy
->routing_attr
!= SUBTRACTIVE_ROUTING
||
1222 child_phy
->routing_attr
!= TABLE_ROUTING
) {
1223 sas_print_parent_topology_bug(child
, parent_phy
, child_phy
);
1226 } else if (parent_phy
->routing_attr
== SUBTRACTIVE_ROUTING
) {
1227 if (child_phy
->routing_attr
== SUBTRACTIVE_ROUTING
) {
1228 res
= sas_check_eeds(child
, parent_phy
, child_phy
);
1229 } else if (child_phy
->routing_attr
!= TABLE_ROUTING
) {
1230 sas_print_parent_topology_bug(child
, parent_phy
, child_phy
);
1233 } else if (parent_phy
->routing_attr
== TABLE_ROUTING
&&
1234 child_phy
->routing_attr
!= SUBTRACTIVE_ROUTING
) {
1235 sas_print_parent_topology_bug(child
, parent_phy
, child_phy
);
1240 if (parent_phy
->routing_attr
!= TABLE_ROUTING
||
1241 child_phy
->routing_attr
!= SUBTRACTIVE_ROUTING
) {
1242 sas_print_parent_topology_bug(child
, parent_phy
, child_phy
);
1254 #define RRI_REQ_SIZE 16
1255 #define RRI_RESP_SIZE 44
1257 static int sas_configure_present(struct domain_device
*dev
, int phy_id
,
1258 u8
*sas_addr
, int *index
, int *present
)
1261 struct expander_device
*ex
= &dev
->ex_dev
;
1262 struct ex_phy
*phy
= &ex
->ex_phy
[phy_id
];
1269 rri_req
= alloc_smp_req(RRI_REQ_SIZE
);
1273 rri_resp
= alloc_smp_resp(RRI_RESP_SIZE
);
1279 rri_req
[1] = SMP_REPORT_ROUTE_INFO
;
1280 rri_req
[9] = phy_id
;
1282 for (i
= 0; i
< ex
->max_route_indexes
; i
++) {
1283 *(__be16
*)(rri_req
+6) = cpu_to_be16(i
);
1284 res
= smp_execute_task(dev
, rri_req
, RRI_REQ_SIZE
, rri_resp
,
1289 if (res
== SMP_RESP_NO_INDEX
) {
1290 SAS_DPRINTK("overflow of indexes: dev %016llx "
1291 "phy 0x%x index 0x%x\n",
1292 SAS_ADDR(dev
->sas_addr
), phy_id
, i
);
1294 } else if (res
!= SMP_RESP_FUNC_ACC
) {
1295 SAS_DPRINTK("%s: dev %016llx phy 0x%x index 0x%x "
1296 "result 0x%x\n", __func__
,
1297 SAS_ADDR(dev
->sas_addr
), phy_id
, i
, res
);
1300 if (SAS_ADDR(sas_addr
) != 0) {
1301 if (SAS_ADDR(rri_resp
+16) == SAS_ADDR(sas_addr
)) {
1303 if ((rri_resp
[12] & 0x80) == 0x80)
1308 } else if (SAS_ADDR(rri_resp
+16) == 0) {
1313 } else if (SAS_ADDR(rri_resp
+16) == 0 &&
1314 phy
->last_da_index
< i
) {
1315 phy
->last_da_index
= i
;
1328 #define CRI_REQ_SIZE 44
1329 #define CRI_RESP_SIZE 8
1331 static int sas_configure_set(struct domain_device
*dev
, int phy_id
,
1332 u8
*sas_addr
, int index
, int include
)
1338 cri_req
= alloc_smp_req(CRI_REQ_SIZE
);
1342 cri_resp
= alloc_smp_resp(CRI_RESP_SIZE
);
1348 cri_req
[1] = SMP_CONF_ROUTE_INFO
;
1349 *(__be16
*)(cri_req
+6) = cpu_to_be16(index
);
1350 cri_req
[9] = phy_id
;
1351 if (SAS_ADDR(sas_addr
) == 0 || !include
)
1352 cri_req
[12] |= 0x80;
1353 memcpy(cri_req
+16, sas_addr
, SAS_ADDR_SIZE
);
1355 res
= smp_execute_task(dev
, cri_req
, CRI_REQ_SIZE
, cri_resp
,
1360 if (res
== SMP_RESP_NO_INDEX
) {
1361 SAS_DPRINTK("overflow of indexes: dev %016llx phy 0x%x "
1363 SAS_ADDR(dev
->sas_addr
), phy_id
, index
);
1371 static int sas_configure_phy(struct domain_device
*dev
, int phy_id
,
1372 u8
*sas_addr
, int include
)
1378 res
= sas_configure_present(dev
, phy_id
, sas_addr
, &index
, &present
);
1381 if (include
^ present
)
1382 return sas_configure_set(dev
, phy_id
, sas_addr
, index
,include
);
1388 * sas_configure_parent -- configure routing table of parent
1389 * parent: parent expander
1390 * child: child expander
1391 * sas_addr: SAS port identifier of device directly attached to child
1393 static int sas_configure_parent(struct domain_device
*parent
,
1394 struct domain_device
*child
,
1395 u8
*sas_addr
, int include
)
1397 struct expander_device
*ex_parent
= &parent
->ex_dev
;
1401 if (parent
->parent
) {
1402 res
= sas_configure_parent(parent
->parent
, parent
, sas_addr
,
1408 if (ex_parent
->conf_route_table
== 0) {
1409 SAS_DPRINTK("ex %016llx has self-configuring routing table\n",
1410 SAS_ADDR(parent
->sas_addr
));
1414 for (i
= 0; i
< ex_parent
->num_phys
; i
++) {
1415 struct ex_phy
*phy
= &ex_parent
->ex_phy
[i
];
1417 if ((phy
->routing_attr
== TABLE_ROUTING
) &&
1418 (SAS_ADDR(phy
->attached_sas_addr
) ==
1419 SAS_ADDR(child
->sas_addr
))) {
1420 res
= sas_configure_phy(parent
, i
, sas_addr
, include
);
1430 * sas_configure_routing -- configure routing
1431 * dev: expander device
1432 * sas_addr: port identifier of device directly attached to the expander device
1434 static int sas_configure_routing(struct domain_device
*dev
, u8
*sas_addr
)
1437 return sas_configure_parent(dev
->parent
, dev
, sas_addr
, 1);
1441 static int sas_disable_routing(struct domain_device
*dev
, u8
*sas_addr
)
1444 return sas_configure_parent(dev
->parent
, dev
, sas_addr
, 0);
1449 * sas_discover_expander -- expander discovery
1450 * @ex: pointer to expander domain device
1452 * See comment in sas_discover_sata().
1454 static int sas_discover_expander(struct domain_device
*dev
)
1458 res
= sas_notify_lldd_dev_found(dev
);
1462 res
= sas_ex_general(dev
);
1465 res
= sas_ex_manuf_info(dev
);
1469 res
= sas_expander_discover(dev
);
1471 SAS_DPRINTK("expander %016llx discovery failed(0x%x)\n",
1472 SAS_ADDR(dev
->sas_addr
), res
);
1476 sas_check_ex_subtractive_boundary(dev
);
1477 res
= sas_check_parent_topology(dev
);
1482 sas_notify_lldd_dev_gone(dev
);
1486 static int sas_ex_level_discovery(struct asd_sas_port
*port
, const int level
)
1489 struct domain_device
*dev
;
1491 list_for_each_entry(dev
, &port
->dev_list
, dev_list_node
) {
1492 if (dev
->dev_type
== EDGE_DEV
||
1493 dev
->dev_type
== FANOUT_DEV
) {
1494 struct sas_expander_device
*ex
=
1495 rphy_to_expander_device(dev
->rphy
);
1497 if (level
== ex
->level
)
1498 res
= sas_ex_discover_devices(dev
, -1);
1500 res
= sas_ex_discover_devices(port
->port_dev
, -1);
1508 static int sas_ex_bfs_disc(struct asd_sas_port
*port
)
1514 level
= port
->disc
.max_level
;
1515 res
= sas_ex_level_discovery(port
, level
);
1517 } while (level
< port
->disc
.max_level
);
1522 int sas_discover_root_expander(struct domain_device
*dev
)
1525 struct sas_expander_device
*ex
= rphy_to_expander_device(dev
->rphy
);
1527 res
= sas_rphy_add(dev
->rphy
);
1531 ex
->level
= dev
->port
->disc
.max_level
; /* 0 */
1532 res
= sas_discover_expander(dev
);
1536 sas_ex_bfs_disc(dev
->port
);
1541 sas_rphy_remove(dev
->rphy
);
1546 /* ---------- Domain revalidation ---------- */
1548 static int sas_get_phy_discover(struct domain_device
*dev
,
1549 int phy_id
, struct smp_resp
*disc_resp
)
1554 disc_req
= alloc_smp_req(DISCOVER_REQ_SIZE
);
1558 disc_req
[1] = SMP_DISCOVER
;
1559 disc_req
[9] = phy_id
;
1561 res
= smp_execute_task(dev
, disc_req
, DISCOVER_REQ_SIZE
,
1562 disc_resp
, DISCOVER_RESP_SIZE
);
1565 else if (disc_resp
->result
!= SMP_RESP_FUNC_ACC
) {
1566 res
= disc_resp
->result
;
1574 static int sas_get_phy_change_count(struct domain_device
*dev
,
1575 int phy_id
, int *pcc
)
1578 struct smp_resp
*disc_resp
;
1580 disc_resp
= alloc_smp_resp(DISCOVER_RESP_SIZE
);
1584 res
= sas_get_phy_discover(dev
, phy_id
, disc_resp
);
1586 *pcc
= disc_resp
->disc
.change_count
;
1592 static int sas_get_phy_attached_sas_addr(struct domain_device
*dev
,
1593 int phy_id
, u8
*attached_sas_addr
)
1596 struct smp_resp
*disc_resp
;
1597 struct discover_resp
*dr
;
1599 disc_resp
= alloc_smp_resp(DISCOVER_RESP_SIZE
);
1602 dr
= &disc_resp
->disc
;
1604 res
= sas_get_phy_discover(dev
, phy_id
, disc_resp
);
1606 memcpy(attached_sas_addr
,disc_resp
->disc
.attached_sas_addr
,8);
1607 if (dr
->attached_dev_type
== 0)
1608 memset(attached_sas_addr
, 0, 8);
1614 static int sas_find_bcast_phy(struct domain_device
*dev
, int *phy_id
,
1615 int from_phy
, bool update
)
1617 struct expander_device
*ex
= &dev
->ex_dev
;
1621 for (i
= from_phy
; i
< ex
->num_phys
; i
++) {
1622 int phy_change_count
= 0;
1624 res
= sas_get_phy_change_count(dev
, i
, &phy_change_count
);
1627 else if (phy_change_count
!= ex
->ex_phy
[i
].phy_change_count
) {
1629 ex
->ex_phy
[i
].phy_change_count
=
1639 static int sas_get_ex_change_count(struct domain_device
*dev
, int *ecc
)
1643 struct smp_resp
*rg_resp
;
1645 rg_req
= alloc_smp_req(RG_REQ_SIZE
);
1649 rg_resp
= alloc_smp_resp(RG_RESP_SIZE
);
1655 rg_req
[1] = SMP_REPORT_GENERAL
;
1657 res
= smp_execute_task(dev
, rg_req
, RG_REQ_SIZE
, rg_resp
,
1661 if (rg_resp
->result
!= SMP_RESP_FUNC_ACC
) {
1662 res
= rg_resp
->result
;
1666 *ecc
= be16_to_cpu(rg_resp
->rg
.change_count
);
1673 * sas_find_bcast_dev - find the device issue BROADCAST(CHANGE).
1674 * @dev:domain device to be detect.
1675 * @src_dev: the device which originated BROADCAST(CHANGE).
1677 * Add self-configuration expander suport. Suppose two expander cascading,
1678 * when the first level expander is self-configuring, hotplug the disks in
1679 * second level expander, BROADCAST(CHANGE) will not only be originated
1680 * in the second level expander, but also be originated in the first level
1681 * expander (see SAS protocol SAS 2r-14, 7.11 for detail), it is to say,
1682 * expander changed count in two level expanders will all increment at least
1683 * once, but the phy which chang count has changed is the source device which
1687 static int sas_find_bcast_dev(struct domain_device
*dev
,
1688 struct domain_device
**src_dev
)
1690 struct expander_device
*ex
= &dev
->ex_dev
;
1691 int ex_change_count
= -1;
1694 struct domain_device
*ch
;
1696 res
= sas_get_ex_change_count(dev
, &ex_change_count
);
1699 if (ex_change_count
!= -1 && ex_change_count
!= ex
->ex_change_count
) {
1700 /* Just detect if this expander phys phy change count changed,
1701 * in order to determine if this expander originate BROADCAST,
1702 * and do not update phy change count field in our structure.
1704 res
= sas_find_bcast_phy(dev
, &phy_id
, 0, false);
1707 ex
->ex_change_count
= ex_change_count
;
1708 SAS_DPRINTK("Expander phy change count has changed\n");
1711 SAS_DPRINTK("Expander phys DID NOT change\n");
1713 list_for_each_entry(ch
, &ex
->children
, siblings
) {
1714 if (ch
->dev_type
== EDGE_DEV
|| ch
->dev_type
== FANOUT_DEV
) {
1715 res
= sas_find_bcast_dev(ch
, src_dev
);
1724 static void sas_unregister_ex_tree(struct domain_device
*dev
)
1726 struct expander_device
*ex
= &dev
->ex_dev
;
1727 struct domain_device
*child
, *n
;
1729 list_for_each_entry_safe(child
, n
, &ex
->children
, siblings
) {
1731 if (child
->dev_type
== EDGE_DEV
||
1732 child
->dev_type
== FANOUT_DEV
)
1733 sas_unregister_ex_tree(child
);
1735 sas_unregister_dev(child
);
1737 sas_unregister_dev(dev
);
1740 static void sas_unregister_devs_sas_addr(struct domain_device
*parent
,
1741 int phy_id
, bool last
)
1743 struct expander_device
*ex_dev
= &parent
->ex_dev
;
1744 struct ex_phy
*phy
= &ex_dev
->ex_phy
[phy_id
];
1745 struct domain_device
*child
, *n
;
1747 list_for_each_entry_safe(child
, n
,
1748 &ex_dev
->children
, siblings
) {
1749 if (SAS_ADDR(child
->sas_addr
) ==
1750 SAS_ADDR(phy
->attached_sas_addr
)) {
1752 if (child
->dev_type
== EDGE_DEV
||
1753 child
->dev_type
== FANOUT_DEV
)
1754 sas_unregister_ex_tree(child
);
1756 sas_unregister_dev(child
);
1761 sas_disable_routing(parent
, phy
->attached_sas_addr
);
1763 memset(phy
->attached_sas_addr
, 0, SAS_ADDR_SIZE
);
1764 sas_port_delete_phy(phy
->port
, phy
->phy
);
1765 if (phy
->port
->num_phys
== 0)
1766 sas_port_delete(phy
->port
);
1770 static int sas_discover_bfs_by_root_level(struct domain_device
*root
,
1773 struct expander_device
*ex_root
= &root
->ex_dev
;
1774 struct domain_device
*child
;
1777 list_for_each_entry(child
, &ex_root
->children
, siblings
) {
1778 if (child
->dev_type
== EDGE_DEV
||
1779 child
->dev_type
== FANOUT_DEV
) {
1780 struct sas_expander_device
*ex
=
1781 rphy_to_expander_device(child
->rphy
);
1783 if (level
> ex
->level
)
1784 res
= sas_discover_bfs_by_root_level(child
,
1786 else if (level
== ex
->level
)
1787 res
= sas_ex_discover_devices(child
, -1);
1793 static int sas_discover_bfs_by_root(struct domain_device
*dev
)
1796 struct sas_expander_device
*ex
= rphy_to_expander_device(dev
->rphy
);
1797 int level
= ex
->level
+1;
1799 res
= sas_ex_discover_devices(dev
, -1);
1803 res
= sas_discover_bfs_by_root_level(dev
, level
);
1806 } while (level
<= dev
->port
->disc
.max_level
);
1811 static int sas_discover_new(struct domain_device
*dev
, int phy_id
)
1813 struct ex_phy
*ex_phy
= &dev
->ex_dev
.ex_phy
[phy_id
];
1814 struct domain_device
*child
;
1818 SAS_DPRINTK("ex %016llx phy%d new device attached\n",
1819 SAS_ADDR(dev
->sas_addr
), phy_id
);
1820 res
= sas_ex_phy_discover(dev
, phy_id
);
1823 /* to support the wide port inserted */
1824 for (i
= 0; i
< dev
->ex_dev
.num_phys
; i
++) {
1825 struct ex_phy
*ex_phy_temp
= &dev
->ex_dev
.ex_phy
[i
];
1828 if (SAS_ADDR(ex_phy_temp
->attached_sas_addr
) ==
1829 SAS_ADDR(ex_phy
->attached_sas_addr
)) {
1835 sas_ex_join_wide_port(dev
, phy_id
);
1838 res
= sas_ex_discover_devices(dev
, phy_id
);
1841 list_for_each_entry(child
, &dev
->ex_dev
.children
, siblings
) {
1842 if (SAS_ADDR(child
->sas_addr
) ==
1843 SAS_ADDR(ex_phy
->attached_sas_addr
)) {
1844 if (child
->dev_type
== EDGE_DEV
||
1845 child
->dev_type
== FANOUT_DEV
)
1846 res
= sas_discover_bfs_by_root(child
);
1854 static int sas_rediscover_dev(struct domain_device
*dev
, int phy_id
, bool last
)
1856 struct expander_device
*ex
= &dev
->ex_dev
;
1857 struct ex_phy
*phy
= &ex
->ex_phy
[phy_id
];
1858 u8 attached_sas_addr
[8];
1861 res
= sas_get_phy_attached_sas_addr(dev
, phy_id
, attached_sas_addr
);
1863 case SMP_RESP_NO_PHY
:
1864 phy
->phy_state
= PHY_NOT_PRESENT
;
1865 sas_unregister_devs_sas_addr(dev
, phy_id
, last
);
1867 case SMP_RESP_PHY_VACANT
:
1868 phy
->phy_state
= PHY_VACANT
;
1869 sas_unregister_devs_sas_addr(dev
, phy_id
, last
);
1871 case SMP_RESP_FUNC_ACC
:
1875 if (SAS_ADDR(attached_sas_addr
) == 0) {
1876 phy
->phy_state
= PHY_EMPTY
;
1877 sas_unregister_devs_sas_addr(dev
, phy_id
, last
);
1878 } else if (SAS_ADDR(attached_sas_addr
) ==
1879 SAS_ADDR(phy
->attached_sas_addr
)) {
1880 SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter\n",
1881 SAS_ADDR(dev
->sas_addr
), phy_id
);
1882 sas_ex_phy_discover(dev
, phy_id
);
1884 res
= sas_discover_new(dev
, phy_id
);
1890 * sas_rediscover - revalidate the domain.
1891 * @dev:domain device to be detect.
1892 * @phy_id: the phy id will be detected.
1894 * NOTE: this process _must_ quit (return) as soon as any connection
1895 * errors are encountered. Connection recovery is done elsewhere.
1896 * Discover process only interrogates devices in order to discover the
1897 * domain.For plugging out, we un-register the device only when it is
1898 * the last phy in the port, for other phys in this port, we just delete it
1899 * from the port.For inserting, we do discovery when it is the
1900 * first phy,for other phys in this port, we add it to the port to
1901 * forming the wide-port.
1903 static int sas_rediscover(struct domain_device
*dev
, const int phy_id
)
1905 struct expander_device
*ex
= &dev
->ex_dev
;
1906 struct ex_phy
*changed_phy
= &ex
->ex_phy
[phy_id
];
1909 bool last
= true; /* is this the last phy of the port */
1911 SAS_DPRINTK("ex %016llx phy%d originated BROADCAST(CHANGE)\n",
1912 SAS_ADDR(dev
->sas_addr
), phy_id
);
1914 if (SAS_ADDR(changed_phy
->attached_sas_addr
) != 0) {
1915 for (i
= 0; i
< ex
->num_phys
; i
++) {
1916 struct ex_phy
*phy
= &ex
->ex_phy
[i
];
1920 if (SAS_ADDR(phy
->attached_sas_addr
) ==
1921 SAS_ADDR(changed_phy
->attached_sas_addr
)) {
1922 SAS_DPRINTK("phy%d part of wide port with "
1923 "phy%d\n", phy_id
, i
);
1928 res
= sas_rediscover_dev(dev
, phy_id
, last
);
1930 res
= sas_discover_new(dev
, phy_id
);
1935 * sas_revalidate_domain -- revalidate the domain
1936 * @port: port to the domain of interest
1938 * NOTE: this process _must_ quit (return) as soon as any connection
1939 * errors are encountered. Connection recovery is done elsewhere.
1940 * Discover process only interrogates devices in order to discover the
1943 int sas_ex_revalidate_domain(struct domain_device
*port_dev
)
1946 struct domain_device
*dev
= NULL
;
1948 res
= sas_find_bcast_dev(port_dev
, &dev
);
1952 struct expander_device
*ex
= &dev
->ex_dev
;
1957 res
= sas_find_bcast_phy(dev
, &phy_id
, i
, true);
1960 res
= sas_rediscover(dev
, phy_id
);
1962 } while (i
< ex
->num_phys
);
1968 int sas_smp_handler(struct Scsi_Host
*shost
, struct sas_rphy
*rphy
,
1969 struct request
*req
)
1971 struct domain_device
*dev
;
1973 struct request
*rsp
= req
->next_rq
;
1976 printk("%s: space for a smp response is missing\n",
1981 /* no rphy means no smp target support (ie aic94xx host) */
1983 return sas_smp_host_handler(shost
, req
, rsp
);
1985 type
= rphy
->identify
.device_type
;
1987 if (type
!= SAS_EDGE_EXPANDER_DEVICE
&&
1988 type
!= SAS_FANOUT_EXPANDER_DEVICE
) {
1989 printk("%s: can we send a smp request to a device?\n",
1994 dev
= sas_find_dev_by_rphy(rphy
);
1996 printk("%s: fail to find a domain_device?\n", __func__
);
2000 /* do we need to support multiple segments? */
2001 if (req
->bio
->bi_vcnt
> 1 || rsp
->bio
->bi_vcnt
> 1) {
2002 printk("%s: multiple segments req %u %u, rsp %u %u\n",
2003 __func__
, req
->bio
->bi_vcnt
, blk_rq_bytes(req
),
2004 rsp
->bio
->bi_vcnt
, blk_rq_bytes(rsp
));
2008 ret
= smp_execute_task(dev
, bio_data(req
->bio
), blk_rq_bytes(req
),
2009 bio_data(rsp
->bio
), blk_rq_bytes(rsp
));
2011 /* positive number is the untransferred residual */
2012 rsp
->resid_len
= ret
;
2015 } else if (ret
== 0) {