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 complete(&task->slow_task->completion);
54 spin_unlock_irqrestore(&task->task_state_lock, flags);
57 static void smp_task_done(struct sas_task *task)
59 del_timer(&task->slow_task->timer);
60 complete(&task->slow_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 mutex_lock(&dev->ex_dev.cmd_mutex);
75 for (retry = 0; retry < 3; retry++) {
76 if (test_bit(SAS_DEV_GONE, &dev->state)) {
81 task = sas_alloc_slow_task(GFP_KERNEL);
87 task->task_proto = dev->tproto;
88 sg_init_one(&task->smp_task.smp_req, req, req_size);
89 sg_init_one(&task->smp_task.smp_resp, resp, resp_size);
91 task->task_done = smp_task_done;
93 task->slow_task->timer.data = (unsigned long) task;
94 task->slow_task->timer.function = smp_task_timedout;
95 task->slow_task->timer.expires = jiffies + SMP_TIMEOUT*HZ;
96 add_timer(&task->slow_task->timer);
98 res = i->dft->lldd_execute_task(task, GFP_KERNEL);
101 del_timer(&task->slow_task->timer);
102 SAS_DPRINTK("executing SMP task failed:%d\n", res);
106 wait_for_completion(&task->slow_task->completion);
108 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
109 SAS_DPRINTK("smp task timed out or aborted\n");
110 i->dft->lldd_abort_task(task);
111 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
112 SAS_DPRINTK("SMP task aborted and not done\n");
116 if (task->task_status.resp == SAS_TASK_COMPLETE &&
117 task->task_status.stat == SAM_STAT_GOOD) {
121 if (task->task_status.resp == SAS_TASK_COMPLETE &&
122 task->task_status.stat == SAS_DATA_UNDERRUN) {
123 /* no error, but return the number of bytes of
125 res = task->task_status.residual;
128 if (task->task_status.resp == SAS_TASK_COMPLETE &&
129 task->task_status.stat == SAS_DATA_OVERRUN) {
133 if (task->task_status.resp == SAS_TASK_UNDELIVERED &&
134 task->task_status.stat == SAS_DEVICE_UNKNOWN)
137 SAS_DPRINTK("%s: task to dev %016llx response: 0x%x "
138 "status 0x%x\n", __func__,
139 SAS_ADDR(dev->sas_addr),
140 task->task_status.resp,
141 task->task_status.stat);
146 mutex_unlock(&dev->ex_dev.cmd_mutex);
148 BUG_ON(retry == 3 && task != NULL);
153 /* ---------- Allocations ---------- */
155 static inline void *alloc_smp_req(int size)
157 u8 *p = kzalloc(size, GFP_KERNEL);
163 static inline void *alloc_smp_resp(int size)
165 return kzalloc(size, GFP_KERNEL);
168 static char sas_route_char(struct domain_device *dev, struct ex_phy *phy)
170 switch (phy->routing_attr) {
172 if (dev->ex_dev.t2t_supp)
178 case SUBTRACTIVE_ROUTING:
185 static enum sas_device_type to_dev_type(struct discover_resp *dr)
187 /* This is detecting a failure to transmit initial dev to host
188 * FIS as described in section J.5 of sas-2 r16
190 if (dr->attached_dev_type == SAS_PHY_UNUSED && dr->attached_sata_dev &&
191 dr->linkrate >= SAS_LINK_RATE_1_5_GBPS)
192 return SAS_SATA_PENDING;
194 return dr->attached_dev_type;
197 static void sas_set_ex_phy(struct domain_device *dev, int phy_id, void *rsp)
199 enum sas_device_type dev_type;
200 enum sas_linkrate linkrate;
201 u8 sas_addr[SAS_ADDR_SIZE];
202 struct smp_resp *resp = rsp;
203 struct discover_resp *dr = &resp->disc;
204 struct sas_ha_struct *ha = dev->port->ha;
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 if (WARN_ON_ONCE(test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state)))
214 phy->phy = sas_phy_alloc(&rphy->dev, phy_id);
216 /* FIXME: error_handling */
220 switch (resp->result) {
221 case SMP_RESP_PHY_VACANT:
222 phy->phy_state = PHY_VACANT;
225 phy->phy_state = PHY_NOT_PRESENT;
227 case SMP_RESP_FUNC_ACC:
228 phy->phy_state = PHY_EMPTY; /* do not know yet */
232 /* check if anything important changed to squelch debug */
233 dev_type = phy->attached_dev_type;
234 linkrate = phy->linkrate;
235 memcpy(sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
237 /* Handle vacant phy - rest of dr data is not valid so skip it */
238 if (phy->phy_state == PHY_VACANT) {
239 memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
240 phy->attached_dev_type = SAS_PHY_UNUSED;
241 if (!test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state)) {
242 phy->phy_id = phy_id;
248 phy->attached_dev_type = to_dev_type(dr);
249 if (test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state))
251 phy->phy_id = phy_id;
252 phy->linkrate = dr->linkrate;
253 phy->attached_sata_host = dr->attached_sata_host;
254 phy->attached_sata_dev = dr->attached_sata_dev;
255 phy->attached_sata_ps = dr->attached_sata_ps;
256 phy->attached_iproto = dr->iproto << 1;
257 phy->attached_tproto = dr->tproto << 1;
258 /* help some expanders that fail to zero sas_address in the 'no
261 if (phy->attached_dev_type == SAS_PHY_UNUSED ||
262 phy->linkrate < SAS_LINK_RATE_1_5_GBPS)
263 memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
265 memcpy(phy->attached_sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE);
266 phy->attached_phy_id = dr->attached_phy_id;
267 phy->phy_change_count = dr->change_count;
268 phy->routing_attr = dr->routing_attr;
269 phy->virtual = dr->virtual;
270 phy->last_da_index = -1;
272 phy->phy->identify.sas_address = SAS_ADDR(phy->attached_sas_addr);
273 phy->phy->identify.device_type = dr->attached_dev_type;
274 phy->phy->identify.initiator_port_protocols = phy->attached_iproto;
275 phy->phy->identify.target_port_protocols = phy->attached_tproto;
276 if (!phy->attached_tproto && dr->attached_sata_dev)
277 phy->phy->identify.target_port_protocols = SAS_PROTOCOL_SATA;
278 phy->phy->identify.phy_identifier = phy_id;
279 phy->phy->minimum_linkrate_hw = dr->hmin_linkrate;
280 phy->phy->maximum_linkrate_hw = dr->hmax_linkrate;
281 phy->phy->minimum_linkrate = dr->pmin_linkrate;
282 phy->phy->maximum_linkrate = dr->pmax_linkrate;
283 phy->phy->negotiated_linkrate = phy->linkrate;
284 phy->phy->enabled = (phy->linkrate != SAS_PHY_DISABLED);
288 if (sas_phy_add(phy->phy)) {
289 sas_phy_free(phy->phy);
294 switch (phy->attached_dev_type) {
295 case SAS_SATA_PENDING:
296 type = "stp pending";
302 if (phy->attached_iproto) {
303 if (phy->attached_tproto)
304 type = "host+target";
308 if (dr->attached_sata_dev)
314 case SAS_EDGE_EXPANDER_DEVICE:
315 case SAS_FANOUT_EXPANDER_DEVICE:
322 /* this routine is polled by libata error recovery so filter
323 * unimportant messages
325 if (new_phy || phy->attached_dev_type != dev_type ||
326 phy->linkrate != linkrate ||
327 SAS_ADDR(phy->attached_sas_addr) != SAS_ADDR(sas_addr))
332 /* if the attached device type changed and ata_eh is active,
333 * make sure we run revalidation when eh completes (see:
334 * sas_enable_revalidation)
336 if (test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state))
337 set_bit(DISCE_REVALIDATE_DOMAIN, &dev->port->disc.pending);
339 SAS_DPRINTK("%sex %016llx phy%02d:%c:%X attached: %016llx (%s)\n",
340 test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state) ? "ata: " : "",
341 SAS_ADDR(dev->sas_addr), phy->phy_id,
342 sas_route_char(dev, phy), phy->linkrate,
343 SAS_ADDR(phy->attached_sas_addr), type);
346 /* check if we have an existing attached ata device on this expander phy */
347 struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id)
349 struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy_id];
350 struct domain_device *dev;
351 struct sas_rphy *rphy;
356 rphy = ex_phy->port->rphy;
360 dev = sas_find_dev_by_rphy(rphy);
362 if (dev && dev_is_sata(dev))
368 #define DISCOVER_REQ_SIZE 16
369 #define DISCOVER_RESP_SIZE 56
371 static int sas_ex_phy_discover_helper(struct domain_device *dev, u8 *disc_req,
372 u8 *disc_resp, int single)
374 struct discover_resp *dr;
377 disc_req[9] = single;
379 res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE,
380 disc_resp, DISCOVER_RESP_SIZE);
383 dr = &((struct smp_resp *)disc_resp)->disc;
384 if (memcmp(dev->sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE) == 0) {
385 sas_printk("Found loopback topology, just ignore it!\n");
388 sas_set_ex_phy(dev, single, disc_resp);
392 int sas_ex_phy_discover(struct domain_device *dev, int single)
394 struct expander_device *ex = &dev->ex_dev;
399 disc_req = alloc_smp_req(DISCOVER_REQ_SIZE);
403 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
409 disc_req[1] = SMP_DISCOVER;
411 if (0 <= single && single < ex->num_phys) {
412 res = sas_ex_phy_discover_helper(dev, disc_req, disc_resp, single);
416 for (i = 0; i < ex->num_phys; i++) {
417 res = sas_ex_phy_discover_helper(dev, disc_req,
429 static int sas_expander_discover(struct domain_device *dev)
431 struct expander_device *ex = &dev->ex_dev;
434 ex->ex_phy = kzalloc(sizeof(*ex->ex_phy)*ex->num_phys, GFP_KERNEL);
438 res = sas_ex_phy_discover(dev, -1);
449 #define MAX_EXPANDER_PHYS 128
451 static void ex_assign_report_general(struct domain_device *dev,
452 struct smp_resp *resp)
454 struct report_general_resp *rg = &resp->rg;
456 dev->ex_dev.ex_change_count = be16_to_cpu(rg->change_count);
457 dev->ex_dev.max_route_indexes = be16_to_cpu(rg->route_indexes);
458 dev->ex_dev.num_phys = min(rg->num_phys, (u8)MAX_EXPANDER_PHYS);
459 dev->ex_dev.t2t_supp = rg->t2t_supp;
460 dev->ex_dev.conf_route_table = rg->conf_route_table;
461 dev->ex_dev.configuring = rg->configuring;
462 memcpy(dev->ex_dev.enclosure_logical_id, rg->enclosure_logical_id, 8);
465 #define RG_REQ_SIZE 8
466 #define RG_RESP_SIZE 32
468 static int sas_ex_general(struct domain_device *dev)
471 struct smp_resp *rg_resp;
475 rg_req = alloc_smp_req(RG_REQ_SIZE);
479 rg_resp = alloc_smp_resp(RG_RESP_SIZE);
485 rg_req[1] = SMP_REPORT_GENERAL;
487 for (i = 0; i < 5; i++) {
488 res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp,
492 SAS_DPRINTK("RG to ex %016llx failed:0x%x\n",
493 SAS_ADDR(dev->sas_addr), res);
495 } else if (rg_resp->result != SMP_RESP_FUNC_ACC) {
496 SAS_DPRINTK("RG:ex %016llx returned SMP result:0x%x\n",
497 SAS_ADDR(dev->sas_addr), rg_resp->result);
498 res = rg_resp->result;
502 ex_assign_report_general(dev, rg_resp);
504 if (dev->ex_dev.configuring) {
505 SAS_DPRINTK("RG: ex %llx self-configuring...\n",
506 SAS_ADDR(dev->sas_addr));
507 schedule_timeout_interruptible(5*HZ);
517 static void ex_assign_manuf_info(struct domain_device *dev, void
520 u8 *mi_resp = _mi_resp;
521 struct sas_rphy *rphy = dev->rphy;
522 struct sas_expander_device *edev = rphy_to_expander_device(rphy);
524 memcpy(edev->vendor_id, mi_resp + 12, SAS_EXPANDER_VENDOR_ID_LEN);
525 memcpy(edev->product_id, mi_resp + 20, SAS_EXPANDER_PRODUCT_ID_LEN);
526 memcpy(edev->product_rev, mi_resp + 36,
527 SAS_EXPANDER_PRODUCT_REV_LEN);
529 if (mi_resp[8] & 1) {
530 memcpy(edev->component_vendor_id, mi_resp + 40,
531 SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN);
532 edev->component_id = mi_resp[48] << 8 | mi_resp[49];
533 edev->component_revision_id = mi_resp[50];
537 #define MI_REQ_SIZE 8
538 #define MI_RESP_SIZE 64
540 static int sas_ex_manuf_info(struct domain_device *dev)
546 mi_req = alloc_smp_req(MI_REQ_SIZE);
550 mi_resp = alloc_smp_resp(MI_RESP_SIZE);
556 mi_req[1] = SMP_REPORT_MANUF_INFO;
558 res = smp_execute_task(dev, mi_req, MI_REQ_SIZE, mi_resp,MI_RESP_SIZE);
560 SAS_DPRINTK("MI: ex %016llx failed:0x%x\n",
561 SAS_ADDR(dev->sas_addr), res);
563 } else if (mi_resp[2] != SMP_RESP_FUNC_ACC) {
564 SAS_DPRINTK("MI ex %016llx returned SMP result:0x%x\n",
565 SAS_ADDR(dev->sas_addr), mi_resp[2]);
569 ex_assign_manuf_info(dev, mi_resp);
576 #define PC_REQ_SIZE 44
577 #define PC_RESP_SIZE 8
579 int sas_smp_phy_control(struct domain_device *dev, int phy_id,
580 enum phy_func phy_func,
581 struct sas_phy_linkrates *rates)
587 pc_req = alloc_smp_req(PC_REQ_SIZE);
591 pc_resp = alloc_smp_resp(PC_RESP_SIZE);
597 pc_req[1] = SMP_PHY_CONTROL;
599 pc_req[10]= phy_func;
601 pc_req[32] = rates->minimum_linkrate << 4;
602 pc_req[33] = rates->maximum_linkrate << 4;
605 res = smp_execute_task(dev, pc_req, PC_REQ_SIZE, pc_resp,PC_RESP_SIZE);
607 pr_err("ex %016llx phy%02d PHY control failed: %d\n",
608 SAS_ADDR(dev->sas_addr), phy_id, res);
609 } else if (pc_resp[2] != SMP_RESP_FUNC_ACC) {
610 pr_err("ex %016llx phy%02d PHY control failed: function result 0x%x\n",
611 SAS_ADDR(dev->sas_addr), phy_id, pc_resp[2]);
619 static void sas_ex_disable_phy(struct domain_device *dev, int phy_id)
621 struct expander_device *ex = &dev->ex_dev;
622 struct ex_phy *phy = &ex->ex_phy[phy_id];
624 sas_smp_phy_control(dev, phy_id, PHY_FUNC_DISABLE, NULL);
625 phy->linkrate = SAS_PHY_DISABLED;
628 static void sas_ex_disable_port(struct domain_device *dev, u8 *sas_addr)
630 struct expander_device *ex = &dev->ex_dev;
633 for (i = 0; i < ex->num_phys; i++) {
634 struct ex_phy *phy = &ex->ex_phy[i];
636 if (phy->phy_state == PHY_VACANT ||
637 phy->phy_state == PHY_NOT_PRESENT)
640 if (SAS_ADDR(phy->attached_sas_addr) == SAS_ADDR(sas_addr))
641 sas_ex_disable_phy(dev, i);
645 static int sas_dev_present_in_domain(struct asd_sas_port *port,
648 struct domain_device *dev;
650 if (SAS_ADDR(port->sas_addr) == SAS_ADDR(sas_addr))
652 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
653 if (SAS_ADDR(dev->sas_addr) == SAS_ADDR(sas_addr))
659 #define RPEL_REQ_SIZE 16
660 #define RPEL_RESP_SIZE 32
661 int sas_smp_get_phy_events(struct sas_phy *phy)
666 struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent);
667 struct domain_device *dev = sas_find_dev_by_rphy(rphy);
669 req = alloc_smp_req(RPEL_REQ_SIZE);
673 resp = alloc_smp_resp(RPEL_RESP_SIZE);
679 req[1] = SMP_REPORT_PHY_ERR_LOG;
680 req[9] = phy->number;
682 res = smp_execute_task(dev, req, RPEL_REQ_SIZE,
683 resp, RPEL_RESP_SIZE);
688 phy->invalid_dword_count = scsi_to_u32(&resp[12]);
689 phy->running_disparity_error_count = scsi_to_u32(&resp[16]);
690 phy->loss_of_dword_sync_count = scsi_to_u32(&resp[20]);
691 phy->phy_reset_problem_count = scsi_to_u32(&resp[24]);
700 #ifdef CONFIG_SCSI_SAS_ATA
702 #define RPS_REQ_SIZE 16
703 #define RPS_RESP_SIZE 60
705 int sas_get_report_phy_sata(struct domain_device *dev, int phy_id,
706 struct smp_resp *rps_resp)
709 u8 *rps_req = alloc_smp_req(RPS_REQ_SIZE);
710 u8 *resp = (u8 *)rps_resp;
715 rps_req[1] = SMP_REPORT_PHY_SATA;
718 res = smp_execute_task(dev, rps_req, RPS_REQ_SIZE,
719 rps_resp, RPS_RESP_SIZE);
721 /* 0x34 is the FIS type for the D2H fis. There's a potential
722 * standards cockup here. sas-2 explicitly specifies the FIS
723 * should be encoded so that FIS type is in resp[24].
724 * However, some expanders endian reverse this. Undo the
726 if (!res && resp[27] == 0x34 && resp[24] != 0x34) {
729 for (i = 0; i < 5; i++) {
734 resp[j + 0] = resp[j + 3];
735 resp[j + 1] = resp[j + 2];
746 static void sas_ex_get_linkrate(struct domain_device *parent,
747 struct domain_device *child,
748 struct ex_phy *parent_phy)
750 struct expander_device *parent_ex = &parent->ex_dev;
751 struct sas_port *port;
756 port = parent_phy->port;
758 for (i = 0; i < parent_ex->num_phys; i++) {
759 struct ex_phy *phy = &parent_ex->ex_phy[i];
761 if (phy->phy_state == PHY_VACANT ||
762 phy->phy_state == PHY_NOT_PRESENT)
765 if (SAS_ADDR(phy->attached_sas_addr) ==
766 SAS_ADDR(child->sas_addr)) {
768 child->min_linkrate = min(parent->min_linkrate,
770 child->max_linkrate = max(parent->max_linkrate,
773 sas_port_add_phy(port, phy->phy);
776 child->linkrate = min(parent_phy->linkrate, child->max_linkrate);
777 child->pathways = min(child->pathways, parent->pathways);
780 static struct domain_device *sas_ex_discover_end_dev(
781 struct domain_device *parent, int phy_id)
783 struct expander_device *parent_ex = &parent->ex_dev;
784 struct ex_phy *phy = &parent_ex->ex_phy[phy_id];
785 struct domain_device *child = NULL;
786 struct sas_rphy *rphy;
789 if (phy->attached_sata_host || phy->attached_sata_ps)
792 child = sas_alloc_device();
796 kref_get(&parent->kref);
797 child->parent = parent;
798 child->port = parent->port;
799 child->iproto = phy->attached_iproto;
800 memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
801 sas_hash_addr(child->hashed_sas_addr, child->sas_addr);
803 phy->port = sas_port_alloc(&parent->rphy->dev, phy_id);
804 if (unlikely(!phy->port))
806 if (unlikely(sas_port_add(phy->port) != 0)) {
807 sas_port_free(phy->port);
811 sas_ex_get_linkrate(parent, child, phy);
812 sas_device_set_phy(child, phy->port);
814 #ifdef CONFIG_SCSI_SAS_ATA
815 if ((phy->attached_tproto & SAS_PROTOCOL_STP) || phy->attached_sata_dev) {
816 if (child->linkrate > parent->min_linkrate) {
817 struct sas_phy_linkrates rates = {
818 .maximum_linkrate = parent->min_linkrate,
819 .minimum_linkrate = parent->min_linkrate,
823 pr_notice("ex %016llx phy%02d SATA device linkrate > min pathway connection rate, attempting to lower device linkrate\n",
824 SAS_ADDR(child->sas_addr), phy_id);
825 ret = sas_smp_phy_control(parent, phy_id,
826 PHY_FUNC_LINK_RESET, &rates);
828 pr_err("ex %016llx phy%02d SATA device could not set linkrate (%d)\n",
829 SAS_ADDR(child->sas_addr), phy_id, ret);
832 pr_notice("ex %016llx phy%02d SATA device set linkrate successfully\n",
833 SAS_ADDR(child->sas_addr), phy_id);
834 child->linkrate = child->min_linkrate;
836 res = sas_get_ata_info(child, phy);
841 res = sas_ata_init(child);
844 rphy = sas_end_device_alloc(phy->port);
847 rphy->identify.phy_identifier = phy_id;
850 get_device(&rphy->dev);
852 list_add_tail(&child->disco_list_node, &parent->port->disco_list);
854 res = sas_discover_sata(child);
856 SAS_DPRINTK("sas_discover_sata() for device %16llx at "
857 "%016llx:0x%x returned 0x%x\n",
858 SAS_ADDR(child->sas_addr),
859 SAS_ADDR(parent->sas_addr), phy_id, res);
864 if (phy->attached_tproto & SAS_PROTOCOL_SSP) {
865 child->dev_type = SAS_END_DEVICE;
866 rphy = sas_end_device_alloc(phy->port);
867 /* FIXME: error handling */
870 child->tproto = phy->attached_tproto;
874 get_device(&rphy->dev);
875 rphy->identify.phy_identifier = phy_id;
876 sas_fill_in_rphy(child, rphy);
878 list_add_tail(&child->disco_list_node, &parent->port->disco_list);
880 res = sas_discover_end_dev(child);
882 SAS_DPRINTK("sas_discover_end_dev() for device %16llx "
883 "at %016llx:0x%x returned 0x%x\n",
884 SAS_ADDR(child->sas_addr),
885 SAS_ADDR(parent->sas_addr), phy_id, res);
889 SAS_DPRINTK("target proto 0x%x at %016llx:0x%x not handled\n",
890 phy->attached_tproto, SAS_ADDR(parent->sas_addr),
895 list_add_tail(&child->siblings, &parent_ex->children);
899 sas_rphy_free(child->rphy);
900 list_del(&child->disco_list_node);
901 spin_lock_irq(&parent->port->dev_list_lock);
902 list_del(&child->dev_list_node);
903 spin_unlock_irq(&parent->port->dev_list_lock);
905 sas_port_delete(phy->port);
908 sas_put_device(child);
912 /* See if this phy is part of a wide port */
913 static bool sas_ex_join_wide_port(struct domain_device *parent, int phy_id)
915 struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id];
918 for (i = 0; i < parent->ex_dev.num_phys; i++) {
919 struct ex_phy *ephy = &parent->ex_dev.ex_phy[i];
924 if (!memcmp(phy->attached_sas_addr, ephy->attached_sas_addr,
925 SAS_ADDR_SIZE) && ephy->port) {
926 sas_port_add_phy(ephy->port, phy->phy);
927 phy->port = ephy->port;
928 phy->phy_state = PHY_DEVICE_DISCOVERED;
936 static struct domain_device *sas_ex_discover_expander(
937 struct domain_device *parent, int phy_id)
939 struct sas_expander_device *parent_ex = rphy_to_expander_device(parent->rphy);
940 struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id];
941 struct domain_device *child = NULL;
942 struct sas_rphy *rphy;
943 struct sas_expander_device *edev;
944 struct asd_sas_port *port;
947 if (phy->routing_attr == DIRECT_ROUTING) {
948 SAS_DPRINTK("ex %016llx:0x%x:D <--> ex %016llx:0x%x is not "
950 SAS_ADDR(parent->sas_addr), phy_id,
951 SAS_ADDR(phy->attached_sas_addr),
952 phy->attached_phy_id);
955 child = sas_alloc_device();
959 phy->port = sas_port_alloc(&parent->rphy->dev, phy_id);
960 /* FIXME: better error handling */
961 BUG_ON(sas_port_add(phy->port) != 0);
964 switch (phy->attached_dev_type) {
965 case SAS_EDGE_EXPANDER_DEVICE:
966 rphy = sas_expander_alloc(phy->port,
967 SAS_EDGE_EXPANDER_DEVICE);
969 case SAS_FANOUT_EXPANDER_DEVICE:
970 rphy = sas_expander_alloc(phy->port,
971 SAS_FANOUT_EXPANDER_DEVICE);
974 rphy = NULL; /* shut gcc up */
979 get_device(&rphy->dev);
980 edev = rphy_to_expander_device(rphy);
981 child->dev_type = phy->attached_dev_type;
982 kref_get(&parent->kref);
983 child->parent = parent;
985 child->iproto = phy->attached_iproto;
986 child->tproto = phy->attached_tproto;
987 memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
988 sas_hash_addr(child->hashed_sas_addr, child->sas_addr);
989 sas_ex_get_linkrate(parent, child, phy);
990 edev->level = parent_ex->level + 1;
991 parent->port->disc.max_level = max(parent->port->disc.max_level,
994 sas_fill_in_rphy(child, rphy);
997 spin_lock_irq(&parent->port->dev_list_lock);
998 list_add_tail(&child->dev_list_node, &parent->port->dev_list);
999 spin_unlock_irq(&parent->port->dev_list_lock);
1001 res = sas_discover_expander(child);
1003 sas_rphy_delete(rphy);
1004 spin_lock_irq(&parent->port->dev_list_lock);
1005 list_del(&child->dev_list_node);
1006 spin_unlock_irq(&parent->port->dev_list_lock);
1007 sas_put_device(child);
1008 sas_port_delete(phy->port);
1012 list_add_tail(&child->siblings, &parent->ex_dev.children);
1016 static int sas_ex_discover_dev(struct domain_device *dev, int phy_id)
1018 struct expander_device *ex = &dev->ex_dev;
1019 struct ex_phy *ex_phy = &ex->ex_phy[phy_id];
1020 struct domain_device *child = NULL;
1024 if (ex_phy->linkrate == SAS_SATA_SPINUP_HOLD) {
1025 if (!sas_smp_phy_control(dev, phy_id, PHY_FUNC_LINK_RESET, NULL))
1026 res = sas_ex_phy_discover(dev, phy_id);
1031 /* Parent and domain coherency */
1032 if (!dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) ==
1033 SAS_ADDR(dev->port->sas_addr))) {
1034 sas_add_parent_port(dev, phy_id);
1037 if (dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) ==
1038 SAS_ADDR(dev->parent->sas_addr))) {
1039 sas_add_parent_port(dev, phy_id);
1040 if (ex_phy->routing_attr == TABLE_ROUTING)
1041 sas_configure_phy(dev, phy_id, dev->port->sas_addr, 1);
1045 if (sas_dev_present_in_domain(dev->port, ex_phy->attached_sas_addr))
1046 sas_ex_disable_port(dev, ex_phy->attached_sas_addr);
1048 if (ex_phy->attached_dev_type == SAS_PHY_UNUSED) {
1049 if (ex_phy->routing_attr == DIRECT_ROUTING) {
1050 memset(ex_phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
1051 sas_configure_routing(dev, ex_phy->attached_sas_addr);
1054 } else if (ex_phy->linkrate == SAS_LINK_RATE_UNKNOWN)
1057 if (ex_phy->attached_dev_type != SAS_END_DEVICE &&
1058 ex_phy->attached_dev_type != SAS_FANOUT_EXPANDER_DEVICE &&
1059 ex_phy->attached_dev_type != SAS_EDGE_EXPANDER_DEVICE &&
1060 ex_phy->attached_dev_type != SAS_SATA_PENDING) {
1061 SAS_DPRINTK("unknown device type(0x%x) attached to ex %016llx "
1062 "phy 0x%x\n", ex_phy->attached_dev_type,
1063 SAS_ADDR(dev->sas_addr),
1068 res = sas_configure_routing(dev, ex_phy->attached_sas_addr);
1070 SAS_DPRINTK("configure routing for dev %016llx "
1071 "reported 0x%x. Forgotten\n",
1072 SAS_ADDR(ex_phy->attached_sas_addr), res);
1073 sas_disable_routing(dev, ex_phy->attached_sas_addr);
1077 if (sas_ex_join_wide_port(dev, phy_id)) {
1078 SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n",
1079 phy_id, SAS_ADDR(ex_phy->attached_sas_addr));
1083 switch (ex_phy->attached_dev_type) {
1084 case SAS_END_DEVICE:
1085 case SAS_SATA_PENDING:
1086 child = sas_ex_discover_end_dev(dev, phy_id);
1088 case SAS_FANOUT_EXPANDER_DEVICE:
1089 if (SAS_ADDR(dev->port->disc.fanout_sas_addr)) {
1090 SAS_DPRINTK("second fanout expander %016llx phy 0x%x "
1091 "attached to ex %016llx phy 0x%x\n",
1092 SAS_ADDR(ex_phy->attached_sas_addr),
1093 ex_phy->attached_phy_id,
1094 SAS_ADDR(dev->sas_addr),
1096 sas_ex_disable_phy(dev, phy_id);
1099 memcpy(dev->port->disc.fanout_sas_addr,
1100 ex_phy->attached_sas_addr, SAS_ADDR_SIZE);
1102 case SAS_EDGE_EXPANDER_DEVICE:
1103 child = sas_ex_discover_expander(dev, phy_id);
1112 for (i = 0; i < ex->num_phys; i++) {
1113 if (ex->ex_phy[i].phy_state == PHY_VACANT ||
1114 ex->ex_phy[i].phy_state == PHY_NOT_PRESENT)
1117 * Due to races, the phy might not get added to the
1118 * wide port, so we add the phy to the wide port here.
1120 if (SAS_ADDR(ex->ex_phy[i].attached_sas_addr) ==
1121 SAS_ADDR(child->sas_addr)) {
1122 ex->ex_phy[i].phy_state= PHY_DEVICE_DISCOVERED;
1123 if (sas_ex_join_wide_port(dev, i))
1124 SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n",
1125 i, SAS_ADDR(ex->ex_phy[i].attached_sas_addr));
1134 static int sas_find_sub_addr(struct domain_device *dev, u8 *sub_addr)
1136 struct expander_device *ex = &dev->ex_dev;
1139 for (i = 0; i < ex->num_phys; i++) {
1140 struct ex_phy *phy = &ex->ex_phy[i];
1142 if (phy->phy_state == PHY_VACANT ||
1143 phy->phy_state == PHY_NOT_PRESENT)
1146 if ((phy->attached_dev_type == SAS_EDGE_EXPANDER_DEVICE ||
1147 phy->attached_dev_type == SAS_FANOUT_EXPANDER_DEVICE) &&
1148 phy->routing_attr == SUBTRACTIVE_ROUTING) {
1150 memcpy(sub_addr, phy->attached_sas_addr,SAS_ADDR_SIZE);
1158 static int sas_check_level_subtractive_boundary(struct domain_device *dev)
1160 struct expander_device *ex = &dev->ex_dev;
1161 struct domain_device *child;
1162 u8 sub_addr[8] = {0, };
1164 list_for_each_entry(child, &ex->children, siblings) {
1165 if (child->dev_type != SAS_EDGE_EXPANDER_DEVICE &&
1166 child->dev_type != SAS_FANOUT_EXPANDER_DEVICE)
1168 if (sub_addr[0] == 0) {
1169 sas_find_sub_addr(child, sub_addr);
1174 if (sas_find_sub_addr(child, s2) &&
1175 (SAS_ADDR(sub_addr) != SAS_ADDR(s2))) {
1177 SAS_DPRINTK("ex %016llx->%016llx-?->%016llx "
1178 "diverges from subtractive "
1179 "boundary %016llx\n",
1180 SAS_ADDR(dev->sas_addr),
1181 SAS_ADDR(child->sas_addr),
1183 SAS_ADDR(sub_addr));
1185 sas_ex_disable_port(child, s2);
1192 * sas_ex_discover_devices -- discover devices attached to this expander
1193 * dev: pointer to the expander domain device
1194 * single: if you want to do a single phy, else set to -1;
1196 * Configure this expander for use with its devices and register the
1197 * devices of this expander.
1199 static int sas_ex_discover_devices(struct domain_device *dev, int single)
1201 struct expander_device *ex = &dev->ex_dev;
1202 int i = 0, end = ex->num_phys;
1205 if (0 <= single && single < end) {
1210 for ( ; i < end; i++) {
1211 struct ex_phy *ex_phy = &ex->ex_phy[i];
1213 if (ex_phy->phy_state == PHY_VACANT ||
1214 ex_phy->phy_state == PHY_NOT_PRESENT ||
1215 ex_phy->phy_state == PHY_DEVICE_DISCOVERED)
1218 switch (ex_phy->linkrate) {
1219 case SAS_PHY_DISABLED:
1220 case SAS_PHY_RESET_PROBLEM:
1221 case SAS_SATA_PORT_SELECTOR:
1224 res = sas_ex_discover_dev(dev, i);
1232 sas_check_level_subtractive_boundary(dev);
1237 static int sas_check_ex_subtractive_boundary(struct domain_device *dev)
1239 struct expander_device *ex = &dev->ex_dev;
1241 u8 *sub_sas_addr = NULL;
1243 if (dev->dev_type != SAS_EDGE_EXPANDER_DEVICE)
1246 for (i = 0; i < ex->num_phys; i++) {
1247 struct ex_phy *phy = &ex->ex_phy[i];
1249 if (phy->phy_state == PHY_VACANT ||
1250 phy->phy_state == PHY_NOT_PRESENT)
1253 if ((phy->attached_dev_type == SAS_FANOUT_EXPANDER_DEVICE ||
1254 phy->attached_dev_type == SAS_EDGE_EXPANDER_DEVICE) &&
1255 phy->routing_attr == SUBTRACTIVE_ROUTING) {
1258 sub_sas_addr = &phy->attached_sas_addr[0];
1259 else if (SAS_ADDR(sub_sas_addr) !=
1260 SAS_ADDR(phy->attached_sas_addr)) {
1262 SAS_DPRINTK("ex %016llx phy 0x%x "
1263 "diverges(%016llx) on subtractive "
1264 "boundary(%016llx). Disabled\n",
1265 SAS_ADDR(dev->sas_addr), i,
1266 SAS_ADDR(phy->attached_sas_addr),
1267 SAS_ADDR(sub_sas_addr));
1268 sas_ex_disable_phy(dev, i);
1275 static void sas_print_parent_topology_bug(struct domain_device *child,
1276 struct ex_phy *parent_phy,
1277 struct ex_phy *child_phy)
1279 static const char *ex_type[] = {
1280 [SAS_EDGE_EXPANDER_DEVICE] = "edge",
1281 [SAS_FANOUT_EXPANDER_DEVICE] = "fanout",
1283 struct domain_device *parent = child->parent;
1285 sas_printk("%s ex %016llx phy 0x%x <--> %s ex %016llx "
1286 "phy 0x%x has %c:%c routing link!\n",
1288 ex_type[parent->dev_type],
1289 SAS_ADDR(parent->sas_addr),
1292 ex_type[child->dev_type],
1293 SAS_ADDR(child->sas_addr),
1296 sas_route_char(parent, parent_phy),
1297 sas_route_char(child, child_phy));
1300 static int sas_check_eeds(struct domain_device *child,
1301 struct ex_phy *parent_phy,
1302 struct ex_phy *child_phy)
1305 struct domain_device *parent = child->parent;
1307 if (SAS_ADDR(parent->port->disc.fanout_sas_addr) != 0) {
1309 SAS_DPRINTK("edge ex %016llx phy S:0x%x <--> edge ex %016llx "
1310 "phy S:0x%x, while there is a fanout ex %016llx\n",
1311 SAS_ADDR(parent->sas_addr),
1313 SAS_ADDR(child->sas_addr),
1315 SAS_ADDR(parent->port->disc.fanout_sas_addr));
1316 } else if (SAS_ADDR(parent->port->disc.eeds_a) == 0) {
1317 memcpy(parent->port->disc.eeds_a, parent->sas_addr,
1319 memcpy(parent->port->disc.eeds_b, child->sas_addr,
1321 } else if (((SAS_ADDR(parent->port->disc.eeds_a) ==
1322 SAS_ADDR(parent->sas_addr)) ||
1323 (SAS_ADDR(parent->port->disc.eeds_a) ==
1324 SAS_ADDR(child->sas_addr)))
1326 ((SAS_ADDR(parent->port->disc.eeds_b) ==
1327 SAS_ADDR(parent->sas_addr)) ||
1328 (SAS_ADDR(parent->port->disc.eeds_b) ==
1329 SAS_ADDR(child->sas_addr))))
1333 SAS_DPRINTK("edge ex %016llx phy 0x%x <--> edge ex %016llx "
1334 "phy 0x%x link forms a third EEDS!\n",
1335 SAS_ADDR(parent->sas_addr),
1337 SAS_ADDR(child->sas_addr),
1344 /* Here we spill over 80 columns. It is intentional.
1346 static int sas_check_parent_topology(struct domain_device *child)
1348 struct expander_device *child_ex = &child->ex_dev;
1349 struct expander_device *parent_ex;
1356 if (child->parent->dev_type != SAS_EDGE_EXPANDER_DEVICE &&
1357 child->parent->dev_type != SAS_FANOUT_EXPANDER_DEVICE)
1360 parent_ex = &child->parent->ex_dev;
1362 for (i = 0; i < parent_ex->num_phys; i++) {
1363 struct ex_phy *parent_phy = &parent_ex->ex_phy[i];
1364 struct ex_phy *child_phy;
1366 if (parent_phy->phy_state == PHY_VACANT ||
1367 parent_phy->phy_state == PHY_NOT_PRESENT)
1370 if (SAS_ADDR(parent_phy->attached_sas_addr) != SAS_ADDR(child->sas_addr))
1373 child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id];
1375 switch (child->parent->dev_type) {
1376 case SAS_EDGE_EXPANDER_DEVICE:
1377 if (child->dev_type == SAS_FANOUT_EXPANDER_DEVICE) {
1378 if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING ||
1379 child_phy->routing_attr != TABLE_ROUTING) {
1380 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1383 } else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) {
1384 if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) {
1385 res = sas_check_eeds(child, parent_phy, child_phy);
1386 } else if (child_phy->routing_attr != TABLE_ROUTING) {
1387 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1390 } else if (parent_phy->routing_attr == TABLE_ROUTING) {
1391 if (child_phy->routing_attr == SUBTRACTIVE_ROUTING ||
1392 (child_phy->routing_attr == TABLE_ROUTING &&
1393 child_ex->t2t_supp && parent_ex->t2t_supp)) {
1396 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1401 case SAS_FANOUT_EXPANDER_DEVICE:
1402 if (parent_phy->routing_attr != TABLE_ROUTING ||
1403 child_phy->routing_attr != SUBTRACTIVE_ROUTING) {
1404 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1416 #define RRI_REQ_SIZE 16
1417 #define RRI_RESP_SIZE 44
1419 static int sas_configure_present(struct domain_device *dev, int phy_id,
1420 u8 *sas_addr, int *index, int *present)
1423 struct expander_device *ex = &dev->ex_dev;
1424 struct ex_phy *phy = &ex->ex_phy[phy_id];
1431 rri_req = alloc_smp_req(RRI_REQ_SIZE);
1435 rri_resp = alloc_smp_resp(RRI_RESP_SIZE);
1441 rri_req[1] = SMP_REPORT_ROUTE_INFO;
1442 rri_req[9] = phy_id;
1444 for (i = 0; i < ex->max_route_indexes ; i++) {
1445 *(__be16 *)(rri_req+6) = cpu_to_be16(i);
1446 res = smp_execute_task(dev, rri_req, RRI_REQ_SIZE, rri_resp,
1451 if (res == SMP_RESP_NO_INDEX) {
1452 SAS_DPRINTK("overflow of indexes: dev %016llx "
1453 "phy 0x%x index 0x%x\n",
1454 SAS_ADDR(dev->sas_addr), phy_id, i);
1456 } else if (res != SMP_RESP_FUNC_ACC) {
1457 SAS_DPRINTK("%s: dev %016llx phy 0x%x index 0x%x "
1458 "result 0x%x\n", __func__,
1459 SAS_ADDR(dev->sas_addr), phy_id, i, res);
1462 if (SAS_ADDR(sas_addr) != 0) {
1463 if (SAS_ADDR(rri_resp+16) == SAS_ADDR(sas_addr)) {
1465 if ((rri_resp[12] & 0x80) == 0x80)
1470 } else if (SAS_ADDR(rri_resp+16) == 0) {
1475 } else if (SAS_ADDR(rri_resp+16) == 0 &&
1476 phy->last_da_index < i) {
1477 phy->last_da_index = i;
1490 #define CRI_REQ_SIZE 44
1491 #define CRI_RESP_SIZE 8
1493 static int sas_configure_set(struct domain_device *dev, int phy_id,
1494 u8 *sas_addr, int index, int include)
1500 cri_req = alloc_smp_req(CRI_REQ_SIZE);
1504 cri_resp = alloc_smp_resp(CRI_RESP_SIZE);
1510 cri_req[1] = SMP_CONF_ROUTE_INFO;
1511 *(__be16 *)(cri_req+6) = cpu_to_be16(index);
1512 cri_req[9] = phy_id;
1513 if (SAS_ADDR(sas_addr) == 0 || !include)
1514 cri_req[12] |= 0x80;
1515 memcpy(cri_req+16, sas_addr, SAS_ADDR_SIZE);
1517 res = smp_execute_task(dev, cri_req, CRI_REQ_SIZE, cri_resp,
1522 if (res == SMP_RESP_NO_INDEX) {
1523 SAS_DPRINTK("overflow of indexes: dev %016llx phy 0x%x "
1525 SAS_ADDR(dev->sas_addr), phy_id, index);
1533 static int sas_configure_phy(struct domain_device *dev, int phy_id,
1534 u8 *sas_addr, int include)
1540 res = sas_configure_present(dev, phy_id, sas_addr, &index, &present);
1543 if (include ^ present)
1544 return sas_configure_set(dev, phy_id, sas_addr, index,include);
1550 * sas_configure_parent -- configure routing table of parent
1551 * parent: parent expander
1552 * child: child expander
1553 * sas_addr: SAS port identifier of device directly attached to child
1555 static int sas_configure_parent(struct domain_device *parent,
1556 struct domain_device *child,
1557 u8 *sas_addr, int include)
1559 struct expander_device *ex_parent = &parent->ex_dev;
1563 if (parent->parent) {
1564 res = sas_configure_parent(parent->parent, parent, sas_addr,
1570 if (ex_parent->conf_route_table == 0) {
1571 SAS_DPRINTK("ex %016llx has self-configuring routing table\n",
1572 SAS_ADDR(parent->sas_addr));
1576 for (i = 0; i < ex_parent->num_phys; i++) {
1577 struct ex_phy *phy = &ex_parent->ex_phy[i];
1579 if ((phy->routing_attr == TABLE_ROUTING) &&
1580 (SAS_ADDR(phy->attached_sas_addr) ==
1581 SAS_ADDR(child->sas_addr))) {
1582 res = sas_configure_phy(parent, i, sas_addr, include);
1592 * sas_configure_routing -- configure routing
1593 * dev: expander device
1594 * sas_addr: port identifier of device directly attached to the expander device
1596 static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr)
1599 return sas_configure_parent(dev->parent, dev, sas_addr, 1);
1603 static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr)
1606 return sas_configure_parent(dev->parent, dev, sas_addr, 0);
1611 * sas_discover_expander -- expander discovery
1612 * @ex: pointer to expander domain device
1614 * See comment in sas_discover_sata().
1616 static int sas_discover_expander(struct domain_device *dev)
1620 res = sas_notify_lldd_dev_found(dev);
1624 res = sas_ex_general(dev);
1627 res = sas_ex_manuf_info(dev);
1631 res = sas_expander_discover(dev);
1633 SAS_DPRINTK("expander %016llx discovery failed(0x%x)\n",
1634 SAS_ADDR(dev->sas_addr), res);
1638 sas_check_ex_subtractive_boundary(dev);
1639 res = sas_check_parent_topology(dev);
1644 sas_notify_lldd_dev_gone(dev);
1648 static int sas_ex_level_discovery(struct asd_sas_port *port, const int level)
1651 struct domain_device *dev;
1653 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
1654 if (dev->dev_type == SAS_EDGE_EXPANDER_DEVICE ||
1655 dev->dev_type == SAS_FANOUT_EXPANDER_DEVICE) {
1656 struct sas_expander_device *ex =
1657 rphy_to_expander_device(dev->rphy);
1659 if (level == ex->level)
1660 res = sas_ex_discover_devices(dev, -1);
1662 res = sas_ex_discover_devices(port->port_dev, -1);
1670 static int sas_ex_bfs_disc(struct asd_sas_port *port)
1676 level = port->disc.max_level;
1677 res = sas_ex_level_discovery(port, level);
1679 } while (level < port->disc.max_level);
1684 int sas_discover_root_expander(struct domain_device *dev)
1687 struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy);
1689 res = sas_rphy_add(dev->rphy);
1693 ex->level = dev->port->disc.max_level; /* 0 */
1694 res = sas_discover_expander(dev);
1698 sas_ex_bfs_disc(dev->port);
1703 sas_rphy_remove(dev->rphy);
1708 /* ---------- Domain revalidation ---------- */
1710 static int sas_get_phy_discover(struct domain_device *dev,
1711 int phy_id, struct smp_resp *disc_resp)
1716 disc_req = alloc_smp_req(DISCOVER_REQ_SIZE);
1720 disc_req[1] = SMP_DISCOVER;
1721 disc_req[9] = phy_id;
1723 res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE,
1724 disc_resp, DISCOVER_RESP_SIZE);
1727 else if (disc_resp->result != SMP_RESP_FUNC_ACC) {
1728 res = disc_resp->result;
1736 static int sas_get_phy_change_count(struct domain_device *dev,
1737 int phy_id, int *pcc)
1740 struct smp_resp *disc_resp;
1742 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
1746 res = sas_get_phy_discover(dev, phy_id, disc_resp);
1748 *pcc = disc_resp->disc.change_count;
1754 static int sas_get_phy_attached_dev(struct domain_device *dev, int phy_id,
1755 u8 *sas_addr, enum sas_device_type *type)
1758 struct smp_resp *disc_resp;
1759 struct discover_resp *dr;
1761 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
1764 dr = &disc_resp->disc;
1766 res = sas_get_phy_discover(dev, phy_id, disc_resp);
1768 memcpy(sas_addr, disc_resp->disc.attached_sas_addr, 8);
1769 *type = to_dev_type(dr);
1771 memset(sas_addr, 0, 8);
1777 static int sas_find_bcast_phy(struct domain_device *dev, int *phy_id,
1778 int from_phy, bool update)
1780 struct expander_device *ex = &dev->ex_dev;
1784 for (i = from_phy; i < ex->num_phys; i++) {
1785 int phy_change_count = 0;
1787 res = sas_get_phy_change_count(dev, i, &phy_change_count);
1789 case SMP_RESP_PHY_VACANT:
1790 case SMP_RESP_NO_PHY:
1792 case SMP_RESP_FUNC_ACC:
1798 if (phy_change_count != ex->ex_phy[i].phy_change_count) {
1800 ex->ex_phy[i].phy_change_count =
1809 static int sas_get_ex_change_count(struct domain_device *dev, int *ecc)
1813 struct smp_resp *rg_resp;
1815 rg_req = alloc_smp_req(RG_REQ_SIZE);
1819 rg_resp = alloc_smp_resp(RG_RESP_SIZE);
1825 rg_req[1] = SMP_REPORT_GENERAL;
1827 res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp,
1831 if (rg_resp->result != SMP_RESP_FUNC_ACC) {
1832 res = rg_resp->result;
1836 *ecc = be16_to_cpu(rg_resp->rg.change_count);
1843 * sas_find_bcast_dev - find the device issue BROADCAST(CHANGE).
1844 * @dev:domain device to be detect.
1845 * @src_dev: the device which originated BROADCAST(CHANGE).
1847 * Add self-configuration expander support. Suppose two expander cascading,
1848 * when the first level expander is self-configuring, hotplug the disks in
1849 * second level expander, BROADCAST(CHANGE) will not only be originated
1850 * in the second level expander, but also be originated in the first level
1851 * expander (see SAS protocol SAS 2r-14, 7.11 for detail), it is to say,
1852 * expander changed count in two level expanders will all increment at least
1853 * once, but the phy which chang count has changed is the source device which
1857 static int sas_find_bcast_dev(struct domain_device *dev,
1858 struct domain_device **src_dev)
1860 struct expander_device *ex = &dev->ex_dev;
1861 int ex_change_count = -1;
1864 struct domain_device *ch;
1866 res = sas_get_ex_change_count(dev, &ex_change_count);
1869 if (ex_change_count != -1 && ex_change_count != ex->ex_change_count) {
1870 /* Just detect if this expander phys phy change count changed,
1871 * in order to determine if this expander originate BROADCAST,
1872 * and do not update phy change count field in our structure.
1874 res = sas_find_bcast_phy(dev, &phy_id, 0, false);
1877 ex->ex_change_count = ex_change_count;
1878 SAS_DPRINTK("Expander phy change count has changed\n");
1881 SAS_DPRINTK("Expander phys DID NOT change\n");
1883 list_for_each_entry(ch, &ex->children, siblings) {
1884 if (ch->dev_type == SAS_EDGE_EXPANDER_DEVICE || ch->dev_type == SAS_FANOUT_EXPANDER_DEVICE) {
1885 res = sas_find_bcast_dev(ch, src_dev);
1894 static void sas_unregister_ex_tree(struct asd_sas_port *port, struct domain_device *dev)
1896 struct expander_device *ex = &dev->ex_dev;
1897 struct domain_device *child, *n;
1899 list_for_each_entry_safe(child, n, &ex->children, siblings) {
1900 set_bit(SAS_DEV_GONE, &child->state);
1901 if (child->dev_type == SAS_EDGE_EXPANDER_DEVICE ||
1902 child->dev_type == SAS_FANOUT_EXPANDER_DEVICE)
1903 sas_unregister_ex_tree(port, child);
1905 sas_unregister_dev(port, child);
1907 sas_unregister_dev(port, dev);
1910 static void sas_unregister_devs_sas_addr(struct domain_device *parent,
1911 int phy_id, bool last)
1913 struct expander_device *ex_dev = &parent->ex_dev;
1914 struct ex_phy *phy = &ex_dev->ex_phy[phy_id];
1915 struct domain_device *child, *n, *found = NULL;
1917 list_for_each_entry_safe(child, n,
1918 &ex_dev->children, siblings) {
1919 if (SAS_ADDR(child->sas_addr) ==
1920 SAS_ADDR(phy->attached_sas_addr)) {
1921 set_bit(SAS_DEV_GONE, &child->state);
1922 if (child->dev_type == SAS_EDGE_EXPANDER_DEVICE ||
1923 child->dev_type == SAS_FANOUT_EXPANDER_DEVICE)
1924 sas_unregister_ex_tree(parent->port, child);
1926 sas_unregister_dev(parent->port, child);
1931 sas_disable_routing(parent, phy->attached_sas_addr);
1933 memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
1935 sas_port_delete_phy(phy->port, phy->phy);
1936 sas_device_set_phy(found, phy->port);
1937 if (phy->port->num_phys == 0)
1938 sas_port_delete(phy->port);
1943 static int sas_discover_bfs_by_root_level(struct domain_device *root,
1946 struct expander_device *ex_root = &root->ex_dev;
1947 struct domain_device *child;
1950 list_for_each_entry(child, &ex_root->children, siblings) {
1951 if (child->dev_type == SAS_EDGE_EXPANDER_DEVICE ||
1952 child->dev_type == SAS_FANOUT_EXPANDER_DEVICE) {
1953 struct sas_expander_device *ex =
1954 rphy_to_expander_device(child->rphy);
1956 if (level > ex->level)
1957 res = sas_discover_bfs_by_root_level(child,
1959 else if (level == ex->level)
1960 res = sas_ex_discover_devices(child, -1);
1966 static int sas_discover_bfs_by_root(struct domain_device *dev)
1969 struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy);
1970 int level = ex->level+1;
1972 res = sas_ex_discover_devices(dev, -1);
1976 res = sas_discover_bfs_by_root_level(dev, level);
1979 } while (level <= dev->port->disc.max_level);
1984 static int sas_discover_new(struct domain_device *dev, int phy_id)
1986 struct ex_phy *ex_phy = &dev->ex_dev.ex_phy[phy_id];
1987 struct domain_device *child;
1990 SAS_DPRINTK("ex %016llx phy%d new device attached\n",
1991 SAS_ADDR(dev->sas_addr), phy_id);
1992 res = sas_ex_phy_discover(dev, phy_id);
1996 if (sas_ex_join_wide_port(dev, phy_id))
1999 res = sas_ex_discover_devices(dev, phy_id);
2002 list_for_each_entry(child, &dev->ex_dev.children, siblings) {
2003 if (SAS_ADDR(child->sas_addr) ==
2004 SAS_ADDR(ex_phy->attached_sas_addr)) {
2005 if (child->dev_type == SAS_EDGE_EXPANDER_DEVICE ||
2006 child->dev_type == SAS_FANOUT_EXPANDER_DEVICE)
2007 res = sas_discover_bfs_by_root(child);
2014 static bool dev_type_flutter(enum sas_device_type new, enum sas_device_type old)
2019 /* treat device directed resets as flutter, if we went
2020 * SAS_END_DEVICE to SAS_SATA_PENDING the link needs recovery
2022 if ((old == SAS_SATA_PENDING && new == SAS_END_DEVICE) ||
2023 (old == SAS_END_DEVICE && new == SAS_SATA_PENDING))
2029 static int sas_rediscover_dev(struct domain_device *dev, int phy_id, bool last)
2031 struct expander_device *ex = &dev->ex_dev;
2032 struct ex_phy *phy = &ex->ex_phy[phy_id];
2033 enum sas_device_type type = SAS_PHY_UNUSED;
2037 memset(sas_addr, 0, 8);
2038 res = sas_get_phy_attached_dev(dev, phy_id, sas_addr, &type);
2040 case SMP_RESP_NO_PHY:
2041 phy->phy_state = PHY_NOT_PRESENT;
2042 sas_unregister_devs_sas_addr(dev, phy_id, last);
2044 case SMP_RESP_PHY_VACANT:
2045 phy->phy_state = PHY_VACANT;
2046 sas_unregister_devs_sas_addr(dev, phy_id, last);
2048 case SMP_RESP_FUNC_ACC:
2056 if ((SAS_ADDR(sas_addr) == 0) || (res == -ECOMM)) {
2057 phy->phy_state = PHY_EMPTY;
2058 sas_unregister_devs_sas_addr(dev, phy_id, last);
2060 * Even though the PHY is empty, for convenience we discover
2061 * the PHY to update the PHY info, like negotiated linkrate.
2063 sas_ex_phy_discover(dev, phy_id);
2065 } else if (SAS_ADDR(sas_addr) == SAS_ADDR(phy->attached_sas_addr) &&
2066 dev_type_flutter(type, phy->attached_dev_type)) {
2067 struct domain_device *ata_dev = sas_ex_to_ata(dev, phy_id);
2070 sas_ex_phy_discover(dev, phy_id);
2072 if (ata_dev && phy->attached_dev_type == SAS_SATA_PENDING)
2073 action = ", needs recovery";
2074 SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter%s\n",
2075 SAS_ADDR(dev->sas_addr), phy_id, action);
2079 /* we always have to delete the old device when we went here */
2080 SAS_DPRINTK("ex %016llx phy 0x%x replace %016llx\n",
2081 SAS_ADDR(dev->sas_addr), phy_id,
2082 SAS_ADDR(phy->attached_sas_addr));
2083 sas_unregister_devs_sas_addr(dev, phy_id, last);
2085 return sas_discover_new(dev, phy_id);
2089 * sas_rediscover - revalidate the domain.
2090 * @dev:domain device to be detect.
2091 * @phy_id: the phy id will be detected.
2093 * NOTE: this process _must_ quit (return) as soon as any connection
2094 * errors are encountered. Connection recovery is done elsewhere.
2095 * Discover process only interrogates devices in order to discover the
2096 * domain.For plugging out, we un-register the device only when it is
2097 * the last phy in the port, for other phys in this port, we just delete it
2098 * from the port.For inserting, we do discovery when it is the
2099 * first phy,for other phys in this port, we add it to the port to
2100 * forming the wide-port.
2102 static int sas_rediscover(struct domain_device *dev, const int phy_id)
2104 struct expander_device *ex = &dev->ex_dev;
2105 struct ex_phy *changed_phy = &ex->ex_phy[phy_id];
2108 bool last = true; /* is this the last phy of the port */
2110 SAS_DPRINTK("ex %016llx phy%d originated BROADCAST(CHANGE)\n",
2111 SAS_ADDR(dev->sas_addr), phy_id);
2113 if (SAS_ADDR(changed_phy->attached_sas_addr) != 0) {
2114 for (i = 0; i < ex->num_phys; i++) {
2115 struct ex_phy *phy = &ex->ex_phy[i];
2119 if (SAS_ADDR(phy->attached_sas_addr) ==
2120 SAS_ADDR(changed_phy->attached_sas_addr)) {
2121 SAS_DPRINTK("phy%d part of wide port with "
2122 "phy%d\n", phy_id, i);
2127 res = sas_rediscover_dev(dev, phy_id, last);
2129 res = sas_discover_new(dev, phy_id);
2134 * sas_revalidate_domain -- revalidate the domain
2135 * @port: port to the domain of interest
2137 * NOTE: this process _must_ quit (return) as soon as any connection
2138 * errors are encountered. Connection recovery is done elsewhere.
2139 * Discover process only interrogates devices in order to discover the
2142 int sas_ex_revalidate_domain(struct domain_device *port_dev)
2145 struct domain_device *dev = NULL;
2147 res = sas_find_bcast_dev(port_dev, &dev);
2148 while (res == 0 && dev) {
2149 struct expander_device *ex = &dev->ex_dev;
2154 res = sas_find_bcast_phy(dev, &phy_id, i, true);
2157 res = sas_rediscover(dev, phy_id);
2159 } while (i < ex->num_phys);
2162 res = sas_find_bcast_dev(port_dev, &dev);
2167 int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
2168 struct request *req)
2170 struct domain_device *dev;
2172 struct request *rsp = req->next_rq;
2175 printk("%s: space for a smp response is missing\n",
2180 /* no rphy means no smp target support (ie aic94xx host) */
2182 return sas_smp_host_handler(shost, req, rsp);
2184 type = rphy->identify.device_type;
2186 if (type != SAS_EDGE_EXPANDER_DEVICE &&
2187 type != SAS_FANOUT_EXPANDER_DEVICE) {
2188 printk("%s: can we send a smp request to a device?\n",
2193 dev = sas_find_dev_by_rphy(rphy);
2195 printk("%s: fail to find a domain_device?\n", __func__);
2199 /* do we need to support multiple segments? */
2200 if (bio_multiple_segments(req->bio) ||
2201 bio_multiple_segments(rsp->bio)) {
2202 printk("%s: multiple segments req %u, rsp %u\n",
2203 __func__, blk_rq_bytes(req), blk_rq_bytes(rsp));
2207 ret = smp_execute_task(dev, bio_data(req->bio), blk_rq_bytes(req),
2208 bio_data(rsp->bio), blk_rq_bytes(rsp));
2210 /* positive number is the untransferred residual */
2211 rsp->resid_len = ret;
2214 } else if (ret == 0) {