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(struct timer_list *t)
46 struct sas_task_slow *slow = from_timer(slow, t, timer);
47 struct sas_task *task = slow->task;
50 spin_lock_irqsave(&task->task_state_lock, flags);
51 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
52 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
53 complete(&task->slow_task->completion);
55 spin_unlock_irqrestore(&task->task_state_lock, flags);
58 static void smp_task_done(struct sas_task *task)
60 del_timer(&task->slow_task->timer);
61 complete(&task->slow_task->completion);
64 /* Give it some long enough timeout. In seconds. */
65 #define SMP_TIMEOUT 10
67 static int smp_execute_task_sg(struct domain_device *dev,
68 struct scatterlist *req, struct scatterlist *resp)
71 struct sas_task *task = NULL;
72 struct sas_internal *i =
73 to_sas_internal(dev->port->ha->core.shost->transportt);
75 mutex_lock(&dev->ex_dev.cmd_mutex);
76 for (retry = 0; retry < 3; retry++) {
77 if (test_bit(SAS_DEV_GONE, &dev->state)) {
82 task = sas_alloc_slow_task(GFP_KERNEL);
88 task->task_proto = dev->tproto;
89 task->smp_task.smp_req = *req;
90 task->smp_task.smp_resp = *resp;
92 task->task_done = smp_task_done;
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 static int smp_execute_task(struct domain_device *dev, void *req, int req_size,
154 void *resp, int resp_size)
156 struct scatterlist req_sg;
157 struct scatterlist resp_sg;
159 sg_init_one(&req_sg, req, req_size);
160 sg_init_one(&resp_sg, resp, resp_size);
161 return smp_execute_task_sg(dev, &req_sg, &resp_sg);
164 /* ---------- Allocations ---------- */
166 static inline void *alloc_smp_req(int size)
168 u8 *p = kzalloc(size, GFP_KERNEL);
174 static inline void *alloc_smp_resp(int size)
176 return kzalloc(size, GFP_KERNEL);
179 static char sas_route_char(struct domain_device *dev, struct ex_phy *phy)
181 switch (phy->routing_attr) {
183 if (dev->ex_dev.t2t_supp)
189 case SUBTRACTIVE_ROUTING:
196 static enum sas_device_type to_dev_type(struct discover_resp *dr)
198 /* This is detecting a failure to transmit initial dev to host
199 * FIS as described in section J.5 of sas-2 r16
201 if (dr->attached_dev_type == SAS_PHY_UNUSED && dr->attached_sata_dev &&
202 dr->linkrate >= SAS_LINK_RATE_1_5_GBPS)
203 return SAS_SATA_PENDING;
205 return dr->attached_dev_type;
208 static void sas_set_ex_phy(struct domain_device *dev, int phy_id, void *rsp)
210 enum sas_device_type dev_type;
211 enum sas_linkrate linkrate;
212 u8 sas_addr[SAS_ADDR_SIZE];
213 struct smp_resp *resp = rsp;
214 struct discover_resp *dr = &resp->disc;
215 struct sas_ha_struct *ha = dev->port->ha;
216 struct expander_device *ex = &dev->ex_dev;
217 struct ex_phy *phy = &ex->ex_phy[phy_id];
218 struct sas_rphy *rphy = dev->rphy;
219 bool new_phy = !phy->phy;
223 if (WARN_ON_ONCE(test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state)))
225 phy->phy = sas_phy_alloc(&rphy->dev, phy_id);
227 /* FIXME: error_handling */
231 switch (resp->result) {
232 case SMP_RESP_PHY_VACANT:
233 phy->phy_state = PHY_VACANT;
236 phy->phy_state = PHY_NOT_PRESENT;
238 case SMP_RESP_FUNC_ACC:
239 phy->phy_state = PHY_EMPTY; /* do not know yet */
243 /* check if anything important changed to squelch debug */
244 dev_type = phy->attached_dev_type;
245 linkrate = phy->linkrate;
246 memcpy(sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
248 /* Handle vacant phy - rest of dr data is not valid so skip it */
249 if (phy->phy_state == PHY_VACANT) {
250 memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
251 phy->attached_dev_type = SAS_PHY_UNUSED;
252 if (!test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state)) {
253 phy->phy_id = phy_id;
259 phy->attached_dev_type = to_dev_type(dr);
260 if (test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state))
262 phy->phy_id = phy_id;
263 phy->linkrate = dr->linkrate;
264 phy->attached_sata_host = dr->attached_sata_host;
265 phy->attached_sata_dev = dr->attached_sata_dev;
266 phy->attached_sata_ps = dr->attached_sata_ps;
267 phy->attached_iproto = dr->iproto << 1;
268 phy->attached_tproto = dr->tproto << 1;
269 /* help some expanders that fail to zero sas_address in the 'no
272 if (phy->attached_dev_type == SAS_PHY_UNUSED ||
273 phy->linkrate < SAS_LINK_RATE_1_5_GBPS)
274 memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
276 memcpy(phy->attached_sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE);
277 phy->attached_phy_id = dr->attached_phy_id;
278 phy->phy_change_count = dr->change_count;
279 phy->routing_attr = dr->routing_attr;
280 phy->virtual = dr->virtual;
281 phy->last_da_index = -1;
283 phy->phy->identify.sas_address = SAS_ADDR(phy->attached_sas_addr);
284 phy->phy->identify.device_type = dr->attached_dev_type;
285 phy->phy->identify.initiator_port_protocols = phy->attached_iproto;
286 phy->phy->identify.target_port_protocols = phy->attached_tproto;
287 if (!phy->attached_tproto && dr->attached_sata_dev)
288 phy->phy->identify.target_port_protocols = SAS_PROTOCOL_SATA;
289 phy->phy->identify.phy_identifier = phy_id;
290 phy->phy->minimum_linkrate_hw = dr->hmin_linkrate;
291 phy->phy->maximum_linkrate_hw = dr->hmax_linkrate;
292 phy->phy->minimum_linkrate = dr->pmin_linkrate;
293 phy->phy->maximum_linkrate = dr->pmax_linkrate;
294 phy->phy->negotiated_linkrate = phy->linkrate;
295 phy->phy->enabled = (phy->linkrate != SAS_PHY_DISABLED);
299 if (sas_phy_add(phy->phy)) {
300 sas_phy_free(phy->phy);
305 switch (phy->attached_dev_type) {
306 case SAS_SATA_PENDING:
307 type = "stp pending";
313 if (phy->attached_iproto) {
314 if (phy->attached_tproto)
315 type = "host+target";
319 if (dr->attached_sata_dev)
325 case SAS_EDGE_EXPANDER_DEVICE:
326 case SAS_FANOUT_EXPANDER_DEVICE:
333 /* this routine is polled by libata error recovery so filter
334 * unimportant messages
336 if (new_phy || phy->attached_dev_type != dev_type ||
337 phy->linkrate != linkrate ||
338 SAS_ADDR(phy->attached_sas_addr) != SAS_ADDR(sas_addr))
343 /* if the attached device type changed and ata_eh is active,
344 * make sure we run revalidation when eh completes (see:
345 * sas_enable_revalidation)
347 if (test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state))
348 set_bit(DISCE_REVALIDATE_DOMAIN, &dev->port->disc.pending);
350 SAS_DPRINTK("%sex %016llx phy%02d:%c:%X attached: %016llx (%s)\n",
351 test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state) ? "ata: " : "",
352 SAS_ADDR(dev->sas_addr), phy->phy_id,
353 sas_route_char(dev, phy), phy->linkrate,
354 SAS_ADDR(phy->attached_sas_addr), type);
357 /* check if we have an existing attached ata device on this expander phy */
358 struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id)
360 struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy_id];
361 struct domain_device *dev;
362 struct sas_rphy *rphy;
367 rphy = ex_phy->port->rphy;
371 dev = sas_find_dev_by_rphy(rphy);
373 if (dev && dev_is_sata(dev))
379 #define DISCOVER_REQ_SIZE 16
380 #define DISCOVER_RESP_SIZE 56
382 static int sas_ex_phy_discover_helper(struct domain_device *dev, u8 *disc_req,
383 u8 *disc_resp, int single)
385 struct discover_resp *dr;
388 disc_req[9] = single;
390 res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE,
391 disc_resp, DISCOVER_RESP_SIZE);
394 dr = &((struct smp_resp *)disc_resp)->disc;
395 if (memcmp(dev->sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE) == 0) {
396 sas_printk("Found loopback topology, just ignore it!\n");
399 sas_set_ex_phy(dev, single, disc_resp);
403 int sas_ex_phy_discover(struct domain_device *dev, int single)
405 struct expander_device *ex = &dev->ex_dev;
410 disc_req = alloc_smp_req(DISCOVER_REQ_SIZE);
414 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
420 disc_req[1] = SMP_DISCOVER;
422 if (0 <= single && single < ex->num_phys) {
423 res = sas_ex_phy_discover_helper(dev, disc_req, disc_resp, single);
427 for (i = 0; i < ex->num_phys; i++) {
428 res = sas_ex_phy_discover_helper(dev, disc_req,
440 static int sas_expander_discover(struct domain_device *dev)
442 struct expander_device *ex = &dev->ex_dev;
445 ex->ex_phy = kcalloc(ex->num_phys, sizeof(*ex->ex_phy), GFP_KERNEL);
449 res = sas_ex_phy_discover(dev, -1);
460 #define MAX_EXPANDER_PHYS 128
462 static void ex_assign_report_general(struct domain_device *dev,
463 struct smp_resp *resp)
465 struct report_general_resp *rg = &resp->rg;
467 dev->ex_dev.ex_change_count = be16_to_cpu(rg->change_count);
468 dev->ex_dev.max_route_indexes = be16_to_cpu(rg->route_indexes);
469 dev->ex_dev.num_phys = min(rg->num_phys, (u8)MAX_EXPANDER_PHYS);
470 dev->ex_dev.t2t_supp = rg->t2t_supp;
471 dev->ex_dev.conf_route_table = rg->conf_route_table;
472 dev->ex_dev.configuring = rg->configuring;
473 memcpy(dev->ex_dev.enclosure_logical_id, rg->enclosure_logical_id, 8);
476 #define RG_REQ_SIZE 8
477 #define RG_RESP_SIZE 32
479 static int sas_ex_general(struct domain_device *dev)
482 struct smp_resp *rg_resp;
486 rg_req = alloc_smp_req(RG_REQ_SIZE);
490 rg_resp = alloc_smp_resp(RG_RESP_SIZE);
496 rg_req[1] = SMP_REPORT_GENERAL;
498 for (i = 0; i < 5; i++) {
499 res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp,
503 SAS_DPRINTK("RG to ex %016llx failed:0x%x\n",
504 SAS_ADDR(dev->sas_addr), res);
506 } else if (rg_resp->result != SMP_RESP_FUNC_ACC) {
507 SAS_DPRINTK("RG:ex %016llx returned SMP result:0x%x\n",
508 SAS_ADDR(dev->sas_addr), rg_resp->result);
509 res = rg_resp->result;
513 ex_assign_report_general(dev, rg_resp);
515 if (dev->ex_dev.configuring) {
516 SAS_DPRINTK("RG: ex %llx self-configuring...\n",
517 SAS_ADDR(dev->sas_addr));
518 schedule_timeout_interruptible(5*HZ);
528 static void ex_assign_manuf_info(struct domain_device *dev, void
531 u8 *mi_resp = _mi_resp;
532 struct sas_rphy *rphy = dev->rphy;
533 struct sas_expander_device *edev = rphy_to_expander_device(rphy);
535 memcpy(edev->vendor_id, mi_resp + 12, SAS_EXPANDER_VENDOR_ID_LEN);
536 memcpy(edev->product_id, mi_resp + 20, SAS_EXPANDER_PRODUCT_ID_LEN);
537 memcpy(edev->product_rev, mi_resp + 36,
538 SAS_EXPANDER_PRODUCT_REV_LEN);
540 if (mi_resp[8] & 1) {
541 memcpy(edev->component_vendor_id, mi_resp + 40,
542 SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN);
543 edev->component_id = mi_resp[48] << 8 | mi_resp[49];
544 edev->component_revision_id = mi_resp[50];
548 #define MI_REQ_SIZE 8
549 #define MI_RESP_SIZE 64
551 static int sas_ex_manuf_info(struct domain_device *dev)
557 mi_req = alloc_smp_req(MI_REQ_SIZE);
561 mi_resp = alloc_smp_resp(MI_RESP_SIZE);
567 mi_req[1] = SMP_REPORT_MANUF_INFO;
569 res = smp_execute_task(dev, mi_req, MI_REQ_SIZE, mi_resp,MI_RESP_SIZE);
571 SAS_DPRINTK("MI: ex %016llx failed:0x%x\n",
572 SAS_ADDR(dev->sas_addr), res);
574 } else if (mi_resp[2] != SMP_RESP_FUNC_ACC) {
575 SAS_DPRINTK("MI ex %016llx returned SMP result:0x%x\n",
576 SAS_ADDR(dev->sas_addr), mi_resp[2]);
580 ex_assign_manuf_info(dev, mi_resp);
587 #define PC_REQ_SIZE 44
588 #define PC_RESP_SIZE 8
590 int sas_smp_phy_control(struct domain_device *dev, int phy_id,
591 enum phy_func phy_func,
592 struct sas_phy_linkrates *rates)
598 pc_req = alloc_smp_req(PC_REQ_SIZE);
602 pc_resp = alloc_smp_resp(PC_RESP_SIZE);
608 pc_req[1] = SMP_PHY_CONTROL;
610 pc_req[10]= phy_func;
612 pc_req[32] = rates->minimum_linkrate << 4;
613 pc_req[33] = rates->maximum_linkrate << 4;
616 res = smp_execute_task(dev, pc_req, PC_REQ_SIZE, pc_resp,PC_RESP_SIZE);
618 pr_err("ex %016llx phy%02d PHY control failed: %d\n",
619 SAS_ADDR(dev->sas_addr), phy_id, res);
620 } else if (pc_resp[2] != SMP_RESP_FUNC_ACC) {
621 pr_err("ex %016llx phy%02d PHY control failed: function result 0x%x\n",
622 SAS_ADDR(dev->sas_addr), phy_id, pc_resp[2]);
630 static void sas_ex_disable_phy(struct domain_device *dev, int phy_id)
632 struct expander_device *ex = &dev->ex_dev;
633 struct ex_phy *phy = &ex->ex_phy[phy_id];
635 sas_smp_phy_control(dev, phy_id, PHY_FUNC_DISABLE, NULL);
636 phy->linkrate = SAS_PHY_DISABLED;
639 static void sas_ex_disable_port(struct domain_device *dev, u8 *sas_addr)
641 struct expander_device *ex = &dev->ex_dev;
644 for (i = 0; i < ex->num_phys; i++) {
645 struct ex_phy *phy = &ex->ex_phy[i];
647 if (phy->phy_state == PHY_VACANT ||
648 phy->phy_state == PHY_NOT_PRESENT)
651 if (SAS_ADDR(phy->attached_sas_addr) == SAS_ADDR(sas_addr))
652 sas_ex_disable_phy(dev, i);
656 static int sas_dev_present_in_domain(struct asd_sas_port *port,
659 struct domain_device *dev;
661 if (SAS_ADDR(port->sas_addr) == SAS_ADDR(sas_addr))
663 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
664 if (SAS_ADDR(dev->sas_addr) == SAS_ADDR(sas_addr))
670 #define RPEL_REQ_SIZE 16
671 #define RPEL_RESP_SIZE 32
672 int sas_smp_get_phy_events(struct sas_phy *phy)
677 struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent);
678 struct domain_device *dev = sas_find_dev_by_rphy(rphy);
680 req = alloc_smp_req(RPEL_REQ_SIZE);
684 resp = alloc_smp_resp(RPEL_RESP_SIZE);
690 req[1] = SMP_REPORT_PHY_ERR_LOG;
691 req[9] = phy->number;
693 res = smp_execute_task(dev, req, RPEL_REQ_SIZE,
694 resp, RPEL_RESP_SIZE);
699 phy->invalid_dword_count = scsi_to_u32(&resp[12]);
700 phy->running_disparity_error_count = scsi_to_u32(&resp[16]);
701 phy->loss_of_dword_sync_count = scsi_to_u32(&resp[20]);
702 phy->phy_reset_problem_count = scsi_to_u32(&resp[24]);
711 #ifdef CONFIG_SCSI_SAS_ATA
713 #define RPS_REQ_SIZE 16
714 #define RPS_RESP_SIZE 60
716 int sas_get_report_phy_sata(struct domain_device *dev, int phy_id,
717 struct smp_resp *rps_resp)
720 u8 *rps_req = alloc_smp_req(RPS_REQ_SIZE);
721 u8 *resp = (u8 *)rps_resp;
726 rps_req[1] = SMP_REPORT_PHY_SATA;
729 res = smp_execute_task(dev, rps_req, RPS_REQ_SIZE,
730 rps_resp, RPS_RESP_SIZE);
732 /* 0x34 is the FIS type for the D2H fis. There's a potential
733 * standards cockup here. sas-2 explicitly specifies the FIS
734 * should be encoded so that FIS type is in resp[24].
735 * However, some expanders endian reverse this. Undo the
737 if (!res && resp[27] == 0x34 && resp[24] != 0x34) {
740 for (i = 0; i < 5; i++) {
745 resp[j + 0] = resp[j + 3];
746 resp[j + 1] = resp[j + 2];
757 static void sas_ex_get_linkrate(struct domain_device *parent,
758 struct domain_device *child,
759 struct ex_phy *parent_phy)
761 struct expander_device *parent_ex = &parent->ex_dev;
762 struct sas_port *port;
767 port = parent_phy->port;
769 for (i = 0; i < parent_ex->num_phys; i++) {
770 struct ex_phy *phy = &parent_ex->ex_phy[i];
772 if (phy->phy_state == PHY_VACANT ||
773 phy->phy_state == PHY_NOT_PRESENT)
776 if (SAS_ADDR(phy->attached_sas_addr) ==
777 SAS_ADDR(child->sas_addr)) {
779 child->min_linkrate = min(parent->min_linkrate,
781 child->max_linkrate = max(parent->max_linkrate,
784 sas_port_add_phy(port, phy->phy);
787 child->linkrate = min(parent_phy->linkrate, child->max_linkrate);
788 child->pathways = min(child->pathways, parent->pathways);
791 static struct domain_device *sas_ex_discover_end_dev(
792 struct domain_device *parent, int phy_id)
794 struct expander_device *parent_ex = &parent->ex_dev;
795 struct ex_phy *phy = &parent_ex->ex_phy[phy_id];
796 struct domain_device *child = NULL;
797 struct sas_rphy *rphy;
800 if (phy->attached_sata_host || phy->attached_sata_ps)
803 child = sas_alloc_device();
807 kref_get(&parent->kref);
808 child->parent = parent;
809 child->port = parent->port;
810 child->iproto = phy->attached_iproto;
811 memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
812 sas_hash_addr(child->hashed_sas_addr, child->sas_addr);
814 phy->port = sas_port_alloc(&parent->rphy->dev, phy_id);
815 if (unlikely(!phy->port))
817 if (unlikely(sas_port_add(phy->port) != 0)) {
818 sas_port_free(phy->port);
822 sas_ex_get_linkrate(parent, child, phy);
823 sas_device_set_phy(child, phy->port);
825 #ifdef CONFIG_SCSI_SAS_ATA
826 if ((phy->attached_tproto & SAS_PROTOCOL_STP) || phy->attached_sata_dev) {
827 if (child->linkrate > parent->min_linkrate) {
828 struct sas_phy_linkrates rates = {
829 .maximum_linkrate = parent->min_linkrate,
830 .minimum_linkrate = parent->min_linkrate,
834 pr_notice("ex %016llx phy%02d SATA device linkrate > min pathway connection rate, attempting to lower device linkrate\n",
835 SAS_ADDR(child->sas_addr), phy_id);
836 ret = sas_smp_phy_control(parent, phy_id,
837 PHY_FUNC_LINK_RESET, &rates);
839 pr_err("ex %016llx phy%02d SATA device could not set linkrate (%d)\n",
840 SAS_ADDR(child->sas_addr), phy_id, ret);
843 pr_notice("ex %016llx phy%02d SATA device set linkrate successfully\n",
844 SAS_ADDR(child->sas_addr), phy_id);
845 child->linkrate = child->min_linkrate;
847 res = sas_get_ata_info(child, phy);
852 res = sas_ata_init(child);
855 rphy = sas_end_device_alloc(phy->port);
858 rphy->identify.phy_identifier = phy_id;
861 get_device(&rphy->dev);
863 list_add_tail(&child->disco_list_node, &parent->port->disco_list);
865 res = sas_discover_sata(child);
867 SAS_DPRINTK("sas_discover_sata() for device %16llx at "
868 "%016llx:0x%x returned 0x%x\n",
869 SAS_ADDR(child->sas_addr),
870 SAS_ADDR(parent->sas_addr), phy_id, res);
875 if (phy->attached_tproto & SAS_PROTOCOL_SSP) {
876 child->dev_type = SAS_END_DEVICE;
877 rphy = sas_end_device_alloc(phy->port);
878 /* FIXME: error handling */
881 child->tproto = phy->attached_tproto;
885 get_device(&rphy->dev);
886 rphy->identify.phy_identifier = phy_id;
887 sas_fill_in_rphy(child, rphy);
889 list_add_tail(&child->disco_list_node, &parent->port->disco_list);
891 res = sas_discover_end_dev(child);
893 SAS_DPRINTK("sas_discover_end_dev() for device %16llx "
894 "at %016llx:0x%x returned 0x%x\n",
895 SAS_ADDR(child->sas_addr),
896 SAS_ADDR(parent->sas_addr), phy_id, res);
900 SAS_DPRINTK("target proto 0x%x at %016llx:0x%x not handled\n",
901 phy->attached_tproto, SAS_ADDR(parent->sas_addr),
906 list_add_tail(&child->siblings, &parent_ex->children);
910 sas_rphy_free(child->rphy);
911 list_del(&child->disco_list_node);
912 spin_lock_irq(&parent->port->dev_list_lock);
913 list_del(&child->dev_list_node);
914 spin_unlock_irq(&parent->port->dev_list_lock);
916 sas_port_delete(phy->port);
919 sas_put_device(child);
923 /* See if this phy is part of a wide port */
924 static bool sas_ex_join_wide_port(struct domain_device *parent, int phy_id)
926 struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id];
929 for (i = 0; i < parent->ex_dev.num_phys; i++) {
930 struct ex_phy *ephy = &parent->ex_dev.ex_phy[i];
935 if (!memcmp(phy->attached_sas_addr, ephy->attached_sas_addr,
936 SAS_ADDR_SIZE) && ephy->port) {
937 sas_port_add_phy(ephy->port, phy->phy);
938 phy->port = ephy->port;
939 phy->phy_state = PHY_DEVICE_DISCOVERED;
947 static struct domain_device *sas_ex_discover_expander(
948 struct domain_device *parent, int phy_id)
950 struct sas_expander_device *parent_ex = rphy_to_expander_device(parent->rphy);
951 struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id];
952 struct domain_device *child = NULL;
953 struct sas_rphy *rphy;
954 struct sas_expander_device *edev;
955 struct asd_sas_port *port;
958 if (phy->routing_attr == DIRECT_ROUTING) {
959 SAS_DPRINTK("ex %016llx:0x%x:D <--> ex %016llx:0x%x is not "
961 SAS_ADDR(parent->sas_addr), phy_id,
962 SAS_ADDR(phy->attached_sas_addr),
963 phy->attached_phy_id);
966 child = sas_alloc_device();
970 phy->port = sas_port_alloc(&parent->rphy->dev, phy_id);
971 /* FIXME: better error handling */
972 BUG_ON(sas_port_add(phy->port) != 0);
975 switch (phy->attached_dev_type) {
976 case SAS_EDGE_EXPANDER_DEVICE:
977 rphy = sas_expander_alloc(phy->port,
978 SAS_EDGE_EXPANDER_DEVICE);
980 case SAS_FANOUT_EXPANDER_DEVICE:
981 rphy = sas_expander_alloc(phy->port,
982 SAS_FANOUT_EXPANDER_DEVICE);
985 rphy = NULL; /* shut gcc up */
990 get_device(&rphy->dev);
991 edev = rphy_to_expander_device(rphy);
992 child->dev_type = phy->attached_dev_type;
993 kref_get(&parent->kref);
994 child->parent = parent;
996 child->iproto = phy->attached_iproto;
997 child->tproto = phy->attached_tproto;
998 memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
999 sas_hash_addr(child->hashed_sas_addr, child->sas_addr);
1000 sas_ex_get_linkrate(parent, child, phy);
1001 edev->level = parent_ex->level + 1;
1002 parent->port->disc.max_level = max(parent->port->disc.max_level,
1004 sas_init_dev(child);
1005 sas_fill_in_rphy(child, rphy);
1008 spin_lock_irq(&parent->port->dev_list_lock);
1009 list_add_tail(&child->dev_list_node, &parent->port->dev_list);
1010 spin_unlock_irq(&parent->port->dev_list_lock);
1012 res = sas_discover_expander(child);
1014 sas_rphy_delete(rphy);
1015 spin_lock_irq(&parent->port->dev_list_lock);
1016 list_del(&child->dev_list_node);
1017 spin_unlock_irq(&parent->port->dev_list_lock);
1018 sas_put_device(child);
1019 sas_port_delete(phy->port);
1023 list_add_tail(&child->siblings, &parent->ex_dev.children);
1027 static int sas_ex_discover_dev(struct domain_device *dev, int phy_id)
1029 struct expander_device *ex = &dev->ex_dev;
1030 struct ex_phy *ex_phy = &ex->ex_phy[phy_id];
1031 struct domain_device *child = NULL;
1035 if (ex_phy->linkrate == SAS_SATA_SPINUP_HOLD) {
1036 if (!sas_smp_phy_control(dev, phy_id, PHY_FUNC_LINK_RESET, NULL))
1037 res = sas_ex_phy_discover(dev, phy_id);
1042 /* Parent and domain coherency */
1043 if (!dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) ==
1044 SAS_ADDR(dev->port->sas_addr))) {
1045 sas_add_parent_port(dev, phy_id);
1048 if (dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) ==
1049 SAS_ADDR(dev->parent->sas_addr))) {
1050 sas_add_parent_port(dev, phy_id);
1051 if (ex_phy->routing_attr == TABLE_ROUTING)
1052 sas_configure_phy(dev, phy_id, dev->port->sas_addr, 1);
1056 if (sas_dev_present_in_domain(dev->port, ex_phy->attached_sas_addr))
1057 sas_ex_disable_port(dev, ex_phy->attached_sas_addr);
1059 if (ex_phy->attached_dev_type == SAS_PHY_UNUSED) {
1060 if (ex_phy->routing_attr == DIRECT_ROUTING) {
1061 memset(ex_phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
1062 sas_configure_routing(dev, ex_phy->attached_sas_addr);
1065 } else if (ex_phy->linkrate == SAS_LINK_RATE_UNKNOWN)
1068 if (ex_phy->attached_dev_type != SAS_END_DEVICE &&
1069 ex_phy->attached_dev_type != SAS_FANOUT_EXPANDER_DEVICE &&
1070 ex_phy->attached_dev_type != SAS_EDGE_EXPANDER_DEVICE &&
1071 ex_phy->attached_dev_type != SAS_SATA_PENDING) {
1072 SAS_DPRINTK("unknown device type(0x%x) attached to ex %016llx "
1073 "phy 0x%x\n", ex_phy->attached_dev_type,
1074 SAS_ADDR(dev->sas_addr),
1079 res = sas_configure_routing(dev, ex_phy->attached_sas_addr);
1081 SAS_DPRINTK("configure routing for dev %016llx "
1082 "reported 0x%x. Forgotten\n",
1083 SAS_ADDR(ex_phy->attached_sas_addr), res);
1084 sas_disable_routing(dev, ex_phy->attached_sas_addr);
1088 if (sas_ex_join_wide_port(dev, phy_id)) {
1089 SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n",
1090 phy_id, SAS_ADDR(ex_phy->attached_sas_addr));
1094 switch (ex_phy->attached_dev_type) {
1095 case SAS_END_DEVICE:
1096 case SAS_SATA_PENDING:
1097 child = sas_ex_discover_end_dev(dev, phy_id);
1099 case SAS_FANOUT_EXPANDER_DEVICE:
1100 if (SAS_ADDR(dev->port->disc.fanout_sas_addr)) {
1101 SAS_DPRINTK("second fanout expander %016llx phy 0x%x "
1102 "attached to ex %016llx phy 0x%x\n",
1103 SAS_ADDR(ex_phy->attached_sas_addr),
1104 ex_phy->attached_phy_id,
1105 SAS_ADDR(dev->sas_addr),
1107 sas_ex_disable_phy(dev, phy_id);
1110 memcpy(dev->port->disc.fanout_sas_addr,
1111 ex_phy->attached_sas_addr, SAS_ADDR_SIZE);
1113 case SAS_EDGE_EXPANDER_DEVICE:
1114 child = sas_ex_discover_expander(dev, phy_id);
1123 for (i = 0; i < ex->num_phys; i++) {
1124 if (ex->ex_phy[i].phy_state == PHY_VACANT ||
1125 ex->ex_phy[i].phy_state == PHY_NOT_PRESENT)
1128 * Due to races, the phy might not get added to the
1129 * wide port, so we add the phy to the wide port here.
1131 if (SAS_ADDR(ex->ex_phy[i].attached_sas_addr) ==
1132 SAS_ADDR(child->sas_addr)) {
1133 ex->ex_phy[i].phy_state= PHY_DEVICE_DISCOVERED;
1134 if (sas_ex_join_wide_port(dev, i))
1135 SAS_DPRINTK("Attaching ex phy%d to wide port %016llx\n",
1136 i, SAS_ADDR(ex->ex_phy[i].attached_sas_addr));
1145 static int sas_find_sub_addr(struct domain_device *dev, u8 *sub_addr)
1147 struct expander_device *ex = &dev->ex_dev;
1150 for (i = 0; i < ex->num_phys; i++) {
1151 struct ex_phy *phy = &ex->ex_phy[i];
1153 if (phy->phy_state == PHY_VACANT ||
1154 phy->phy_state == PHY_NOT_PRESENT)
1157 if ((phy->attached_dev_type == SAS_EDGE_EXPANDER_DEVICE ||
1158 phy->attached_dev_type == SAS_FANOUT_EXPANDER_DEVICE) &&
1159 phy->routing_attr == SUBTRACTIVE_ROUTING) {
1161 memcpy(sub_addr, phy->attached_sas_addr,SAS_ADDR_SIZE);
1169 static int sas_check_level_subtractive_boundary(struct domain_device *dev)
1171 struct expander_device *ex = &dev->ex_dev;
1172 struct domain_device *child;
1173 u8 sub_addr[8] = {0, };
1175 list_for_each_entry(child, &ex->children, siblings) {
1176 if (child->dev_type != SAS_EDGE_EXPANDER_DEVICE &&
1177 child->dev_type != SAS_FANOUT_EXPANDER_DEVICE)
1179 if (sub_addr[0] == 0) {
1180 sas_find_sub_addr(child, sub_addr);
1185 if (sas_find_sub_addr(child, s2) &&
1186 (SAS_ADDR(sub_addr) != SAS_ADDR(s2))) {
1188 SAS_DPRINTK("ex %016llx->%016llx-?->%016llx "
1189 "diverges from subtractive "
1190 "boundary %016llx\n",
1191 SAS_ADDR(dev->sas_addr),
1192 SAS_ADDR(child->sas_addr),
1194 SAS_ADDR(sub_addr));
1196 sas_ex_disable_port(child, s2);
1203 * sas_ex_discover_devices - discover devices attached to this expander
1204 * @dev: pointer to the expander domain device
1205 * @single: if you want to do a single phy, else set to -1;
1207 * Configure this expander for use with its devices and register the
1208 * devices of this expander.
1210 static int sas_ex_discover_devices(struct domain_device *dev, int single)
1212 struct expander_device *ex = &dev->ex_dev;
1213 int i = 0, end = ex->num_phys;
1216 if (0 <= single && single < end) {
1221 for ( ; i < end; i++) {
1222 struct ex_phy *ex_phy = &ex->ex_phy[i];
1224 if (ex_phy->phy_state == PHY_VACANT ||
1225 ex_phy->phy_state == PHY_NOT_PRESENT ||
1226 ex_phy->phy_state == PHY_DEVICE_DISCOVERED)
1229 switch (ex_phy->linkrate) {
1230 case SAS_PHY_DISABLED:
1231 case SAS_PHY_RESET_PROBLEM:
1232 case SAS_SATA_PORT_SELECTOR:
1235 res = sas_ex_discover_dev(dev, i);
1243 sas_check_level_subtractive_boundary(dev);
1248 static int sas_check_ex_subtractive_boundary(struct domain_device *dev)
1250 struct expander_device *ex = &dev->ex_dev;
1252 u8 *sub_sas_addr = NULL;
1254 if (dev->dev_type != SAS_EDGE_EXPANDER_DEVICE)
1257 for (i = 0; i < ex->num_phys; i++) {
1258 struct ex_phy *phy = &ex->ex_phy[i];
1260 if (phy->phy_state == PHY_VACANT ||
1261 phy->phy_state == PHY_NOT_PRESENT)
1264 if ((phy->attached_dev_type == SAS_FANOUT_EXPANDER_DEVICE ||
1265 phy->attached_dev_type == SAS_EDGE_EXPANDER_DEVICE) &&
1266 phy->routing_attr == SUBTRACTIVE_ROUTING) {
1269 sub_sas_addr = &phy->attached_sas_addr[0];
1270 else if (SAS_ADDR(sub_sas_addr) !=
1271 SAS_ADDR(phy->attached_sas_addr)) {
1273 SAS_DPRINTK("ex %016llx phy 0x%x "
1274 "diverges(%016llx) on subtractive "
1275 "boundary(%016llx). Disabled\n",
1276 SAS_ADDR(dev->sas_addr), i,
1277 SAS_ADDR(phy->attached_sas_addr),
1278 SAS_ADDR(sub_sas_addr));
1279 sas_ex_disable_phy(dev, i);
1286 static void sas_print_parent_topology_bug(struct domain_device *child,
1287 struct ex_phy *parent_phy,
1288 struct ex_phy *child_phy)
1290 static const char *ex_type[] = {
1291 [SAS_EDGE_EXPANDER_DEVICE] = "edge",
1292 [SAS_FANOUT_EXPANDER_DEVICE] = "fanout",
1294 struct domain_device *parent = child->parent;
1296 sas_printk("%s ex %016llx phy 0x%x <--> %s ex %016llx "
1297 "phy 0x%x has %c:%c routing link!\n",
1299 ex_type[parent->dev_type],
1300 SAS_ADDR(parent->sas_addr),
1303 ex_type[child->dev_type],
1304 SAS_ADDR(child->sas_addr),
1307 sas_route_char(parent, parent_phy),
1308 sas_route_char(child, child_phy));
1311 static int sas_check_eeds(struct domain_device *child,
1312 struct ex_phy *parent_phy,
1313 struct ex_phy *child_phy)
1316 struct domain_device *parent = child->parent;
1318 if (SAS_ADDR(parent->port->disc.fanout_sas_addr) != 0) {
1320 SAS_DPRINTK("edge ex %016llx phy S:0x%x <--> edge ex %016llx "
1321 "phy S:0x%x, while there is a fanout ex %016llx\n",
1322 SAS_ADDR(parent->sas_addr),
1324 SAS_ADDR(child->sas_addr),
1326 SAS_ADDR(parent->port->disc.fanout_sas_addr));
1327 } else if (SAS_ADDR(parent->port->disc.eeds_a) == 0) {
1328 memcpy(parent->port->disc.eeds_a, parent->sas_addr,
1330 memcpy(parent->port->disc.eeds_b, child->sas_addr,
1332 } else if (((SAS_ADDR(parent->port->disc.eeds_a) ==
1333 SAS_ADDR(parent->sas_addr)) ||
1334 (SAS_ADDR(parent->port->disc.eeds_a) ==
1335 SAS_ADDR(child->sas_addr)))
1337 ((SAS_ADDR(parent->port->disc.eeds_b) ==
1338 SAS_ADDR(parent->sas_addr)) ||
1339 (SAS_ADDR(parent->port->disc.eeds_b) ==
1340 SAS_ADDR(child->sas_addr))))
1344 SAS_DPRINTK("edge ex %016llx phy 0x%x <--> edge ex %016llx "
1345 "phy 0x%x link forms a third EEDS!\n",
1346 SAS_ADDR(parent->sas_addr),
1348 SAS_ADDR(child->sas_addr),
1355 /* Here we spill over 80 columns. It is intentional.
1357 static int sas_check_parent_topology(struct domain_device *child)
1359 struct expander_device *child_ex = &child->ex_dev;
1360 struct expander_device *parent_ex;
1367 if (child->parent->dev_type != SAS_EDGE_EXPANDER_DEVICE &&
1368 child->parent->dev_type != SAS_FANOUT_EXPANDER_DEVICE)
1371 parent_ex = &child->parent->ex_dev;
1373 for (i = 0; i < parent_ex->num_phys; i++) {
1374 struct ex_phy *parent_phy = &parent_ex->ex_phy[i];
1375 struct ex_phy *child_phy;
1377 if (parent_phy->phy_state == PHY_VACANT ||
1378 parent_phy->phy_state == PHY_NOT_PRESENT)
1381 if (SAS_ADDR(parent_phy->attached_sas_addr) != SAS_ADDR(child->sas_addr))
1384 child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id];
1386 switch (child->parent->dev_type) {
1387 case SAS_EDGE_EXPANDER_DEVICE:
1388 if (child->dev_type == SAS_FANOUT_EXPANDER_DEVICE) {
1389 if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING ||
1390 child_phy->routing_attr != TABLE_ROUTING) {
1391 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1394 } else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) {
1395 if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) {
1396 res = sas_check_eeds(child, parent_phy, child_phy);
1397 } else if (child_phy->routing_attr != TABLE_ROUTING) {
1398 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1401 } else if (parent_phy->routing_attr == TABLE_ROUTING) {
1402 if (child_phy->routing_attr == SUBTRACTIVE_ROUTING ||
1403 (child_phy->routing_attr == TABLE_ROUTING &&
1404 child_ex->t2t_supp && parent_ex->t2t_supp)) {
1407 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1412 case SAS_FANOUT_EXPANDER_DEVICE:
1413 if (parent_phy->routing_attr != TABLE_ROUTING ||
1414 child_phy->routing_attr != SUBTRACTIVE_ROUTING) {
1415 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1427 #define RRI_REQ_SIZE 16
1428 #define RRI_RESP_SIZE 44
1430 static int sas_configure_present(struct domain_device *dev, int phy_id,
1431 u8 *sas_addr, int *index, int *present)
1434 struct expander_device *ex = &dev->ex_dev;
1435 struct ex_phy *phy = &ex->ex_phy[phy_id];
1442 rri_req = alloc_smp_req(RRI_REQ_SIZE);
1446 rri_resp = alloc_smp_resp(RRI_RESP_SIZE);
1452 rri_req[1] = SMP_REPORT_ROUTE_INFO;
1453 rri_req[9] = phy_id;
1455 for (i = 0; i < ex->max_route_indexes ; i++) {
1456 *(__be16 *)(rri_req+6) = cpu_to_be16(i);
1457 res = smp_execute_task(dev, rri_req, RRI_REQ_SIZE, rri_resp,
1462 if (res == SMP_RESP_NO_INDEX) {
1463 SAS_DPRINTK("overflow of indexes: dev %016llx "
1464 "phy 0x%x index 0x%x\n",
1465 SAS_ADDR(dev->sas_addr), phy_id, i);
1467 } else if (res != SMP_RESP_FUNC_ACC) {
1468 SAS_DPRINTK("%s: dev %016llx phy 0x%x index 0x%x "
1469 "result 0x%x\n", __func__,
1470 SAS_ADDR(dev->sas_addr), phy_id, i, res);
1473 if (SAS_ADDR(sas_addr) != 0) {
1474 if (SAS_ADDR(rri_resp+16) == SAS_ADDR(sas_addr)) {
1476 if ((rri_resp[12] & 0x80) == 0x80)
1481 } else if (SAS_ADDR(rri_resp+16) == 0) {
1486 } else if (SAS_ADDR(rri_resp+16) == 0 &&
1487 phy->last_da_index < i) {
1488 phy->last_da_index = i;
1501 #define CRI_REQ_SIZE 44
1502 #define CRI_RESP_SIZE 8
1504 static int sas_configure_set(struct domain_device *dev, int phy_id,
1505 u8 *sas_addr, int index, int include)
1511 cri_req = alloc_smp_req(CRI_REQ_SIZE);
1515 cri_resp = alloc_smp_resp(CRI_RESP_SIZE);
1521 cri_req[1] = SMP_CONF_ROUTE_INFO;
1522 *(__be16 *)(cri_req+6) = cpu_to_be16(index);
1523 cri_req[9] = phy_id;
1524 if (SAS_ADDR(sas_addr) == 0 || !include)
1525 cri_req[12] |= 0x80;
1526 memcpy(cri_req+16, sas_addr, SAS_ADDR_SIZE);
1528 res = smp_execute_task(dev, cri_req, CRI_REQ_SIZE, cri_resp,
1533 if (res == SMP_RESP_NO_INDEX) {
1534 SAS_DPRINTK("overflow of indexes: dev %016llx phy 0x%x "
1536 SAS_ADDR(dev->sas_addr), phy_id, index);
1544 static int sas_configure_phy(struct domain_device *dev, int phy_id,
1545 u8 *sas_addr, int include)
1551 res = sas_configure_present(dev, phy_id, sas_addr, &index, &present);
1554 if (include ^ present)
1555 return sas_configure_set(dev, phy_id, sas_addr, index,include);
1561 * sas_configure_parent - configure routing table of parent
1562 * @parent: parent expander
1563 * @child: child expander
1564 * @sas_addr: SAS port identifier of device directly attached to child
1565 * @include: whether or not to include @child in the expander routing table
1567 static int sas_configure_parent(struct domain_device *parent,
1568 struct domain_device *child,
1569 u8 *sas_addr, int include)
1571 struct expander_device *ex_parent = &parent->ex_dev;
1575 if (parent->parent) {
1576 res = sas_configure_parent(parent->parent, parent, sas_addr,
1582 if (ex_parent->conf_route_table == 0) {
1583 SAS_DPRINTK("ex %016llx has self-configuring routing table\n",
1584 SAS_ADDR(parent->sas_addr));
1588 for (i = 0; i < ex_parent->num_phys; i++) {
1589 struct ex_phy *phy = &ex_parent->ex_phy[i];
1591 if ((phy->routing_attr == TABLE_ROUTING) &&
1592 (SAS_ADDR(phy->attached_sas_addr) ==
1593 SAS_ADDR(child->sas_addr))) {
1594 res = sas_configure_phy(parent, i, sas_addr, include);
1604 * sas_configure_routing - configure routing
1605 * @dev: expander device
1606 * @sas_addr: port identifier of device directly attached to the expander device
1608 static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr)
1611 return sas_configure_parent(dev->parent, dev, sas_addr, 1);
1615 static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr)
1618 return sas_configure_parent(dev->parent, dev, sas_addr, 0);
1623 * sas_discover_expander - expander discovery
1624 * @dev: pointer to expander domain device
1626 * See comment in sas_discover_sata().
1628 static int sas_discover_expander(struct domain_device *dev)
1632 res = sas_notify_lldd_dev_found(dev);
1636 res = sas_ex_general(dev);
1639 res = sas_ex_manuf_info(dev);
1643 res = sas_expander_discover(dev);
1645 SAS_DPRINTK("expander %016llx discovery failed(0x%x)\n",
1646 SAS_ADDR(dev->sas_addr), res);
1650 sas_check_ex_subtractive_boundary(dev);
1651 res = sas_check_parent_topology(dev);
1656 sas_notify_lldd_dev_gone(dev);
1660 static int sas_ex_level_discovery(struct asd_sas_port *port, const int level)
1663 struct domain_device *dev;
1665 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
1666 if (dev->dev_type == SAS_EDGE_EXPANDER_DEVICE ||
1667 dev->dev_type == SAS_FANOUT_EXPANDER_DEVICE) {
1668 struct sas_expander_device *ex =
1669 rphy_to_expander_device(dev->rphy);
1671 if (level == ex->level)
1672 res = sas_ex_discover_devices(dev, -1);
1674 res = sas_ex_discover_devices(port->port_dev, -1);
1682 static int sas_ex_bfs_disc(struct asd_sas_port *port)
1688 level = port->disc.max_level;
1689 res = sas_ex_level_discovery(port, level);
1691 } while (level < port->disc.max_level);
1696 int sas_discover_root_expander(struct domain_device *dev)
1699 struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy);
1701 res = sas_rphy_add(dev->rphy);
1705 ex->level = dev->port->disc.max_level; /* 0 */
1706 res = sas_discover_expander(dev);
1710 sas_ex_bfs_disc(dev->port);
1715 sas_rphy_remove(dev->rphy);
1720 /* ---------- Domain revalidation ---------- */
1722 static int sas_get_phy_discover(struct domain_device *dev,
1723 int phy_id, struct smp_resp *disc_resp)
1728 disc_req = alloc_smp_req(DISCOVER_REQ_SIZE);
1732 disc_req[1] = SMP_DISCOVER;
1733 disc_req[9] = phy_id;
1735 res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE,
1736 disc_resp, DISCOVER_RESP_SIZE);
1739 else if (disc_resp->result != SMP_RESP_FUNC_ACC) {
1740 res = disc_resp->result;
1748 static int sas_get_phy_change_count(struct domain_device *dev,
1749 int phy_id, int *pcc)
1752 struct smp_resp *disc_resp;
1754 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
1758 res = sas_get_phy_discover(dev, phy_id, disc_resp);
1760 *pcc = disc_resp->disc.change_count;
1766 static int sas_get_phy_attached_dev(struct domain_device *dev, int phy_id,
1767 u8 *sas_addr, enum sas_device_type *type)
1770 struct smp_resp *disc_resp;
1771 struct discover_resp *dr;
1773 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
1776 dr = &disc_resp->disc;
1778 res = sas_get_phy_discover(dev, phy_id, disc_resp);
1780 memcpy(sas_addr, disc_resp->disc.attached_sas_addr, 8);
1781 *type = to_dev_type(dr);
1783 memset(sas_addr, 0, 8);
1789 static int sas_find_bcast_phy(struct domain_device *dev, int *phy_id,
1790 int from_phy, bool update)
1792 struct expander_device *ex = &dev->ex_dev;
1796 for (i = from_phy; i < ex->num_phys; i++) {
1797 int phy_change_count = 0;
1799 res = sas_get_phy_change_count(dev, i, &phy_change_count);
1801 case SMP_RESP_PHY_VACANT:
1802 case SMP_RESP_NO_PHY:
1804 case SMP_RESP_FUNC_ACC:
1810 if (phy_change_count != ex->ex_phy[i].phy_change_count) {
1812 ex->ex_phy[i].phy_change_count =
1821 static int sas_get_ex_change_count(struct domain_device *dev, int *ecc)
1825 struct smp_resp *rg_resp;
1827 rg_req = alloc_smp_req(RG_REQ_SIZE);
1831 rg_resp = alloc_smp_resp(RG_RESP_SIZE);
1837 rg_req[1] = SMP_REPORT_GENERAL;
1839 res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp,
1843 if (rg_resp->result != SMP_RESP_FUNC_ACC) {
1844 res = rg_resp->result;
1848 *ecc = be16_to_cpu(rg_resp->rg.change_count);
1855 * sas_find_bcast_dev - find the device issue BROADCAST(CHANGE).
1856 * @dev:domain device to be detect.
1857 * @src_dev: the device which originated BROADCAST(CHANGE).
1859 * Add self-configuration expander support. Suppose two expander cascading,
1860 * when the first level expander is self-configuring, hotplug the disks in
1861 * second level expander, BROADCAST(CHANGE) will not only be originated
1862 * in the second level expander, but also be originated in the first level
1863 * expander (see SAS protocol SAS 2r-14, 7.11 for detail), it is to say,
1864 * expander changed count in two level expanders will all increment at least
1865 * once, but the phy which chang count has changed is the source device which
1869 static int sas_find_bcast_dev(struct domain_device *dev,
1870 struct domain_device **src_dev)
1872 struct expander_device *ex = &dev->ex_dev;
1873 int ex_change_count = -1;
1876 struct domain_device *ch;
1878 res = sas_get_ex_change_count(dev, &ex_change_count);
1881 if (ex_change_count != -1 && ex_change_count != ex->ex_change_count) {
1882 /* Just detect if this expander phys phy change count changed,
1883 * in order to determine if this expander originate BROADCAST,
1884 * and do not update phy change count field in our structure.
1886 res = sas_find_bcast_phy(dev, &phy_id, 0, false);
1889 ex->ex_change_count = ex_change_count;
1890 SAS_DPRINTK("Expander phy change count has changed\n");
1893 SAS_DPRINTK("Expander phys DID NOT change\n");
1895 list_for_each_entry(ch, &ex->children, siblings) {
1896 if (ch->dev_type == SAS_EDGE_EXPANDER_DEVICE || ch->dev_type == SAS_FANOUT_EXPANDER_DEVICE) {
1897 res = sas_find_bcast_dev(ch, src_dev);
1906 static void sas_unregister_ex_tree(struct asd_sas_port *port, struct domain_device *dev)
1908 struct expander_device *ex = &dev->ex_dev;
1909 struct domain_device *child, *n;
1911 list_for_each_entry_safe(child, n, &ex->children, siblings) {
1912 set_bit(SAS_DEV_GONE, &child->state);
1913 if (child->dev_type == SAS_EDGE_EXPANDER_DEVICE ||
1914 child->dev_type == SAS_FANOUT_EXPANDER_DEVICE)
1915 sas_unregister_ex_tree(port, child);
1917 sas_unregister_dev(port, child);
1919 sas_unregister_dev(port, dev);
1922 static void sas_unregister_devs_sas_addr(struct domain_device *parent,
1923 int phy_id, bool last)
1925 struct expander_device *ex_dev = &parent->ex_dev;
1926 struct ex_phy *phy = &ex_dev->ex_phy[phy_id];
1927 struct domain_device *child, *n, *found = NULL;
1929 list_for_each_entry_safe(child, n,
1930 &ex_dev->children, siblings) {
1931 if (SAS_ADDR(child->sas_addr) ==
1932 SAS_ADDR(phy->attached_sas_addr)) {
1933 set_bit(SAS_DEV_GONE, &child->state);
1934 if (child->dev_type == SAS_EDGE_EXPANDER_DEVICE ||
1935 child->dev_type == SAS_FANOUT_EXPANDER_DEVICE)
1936 sas_unregister_ex_tree(parent->port, child);
1938 sas_unregister_dev(parent->port, child);
1943 sas_disable_routing(parent, phy->attached_sas_addr);
1945 memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
1947 sas_port_delete_phy(phy->port, phy->phy);
1948 sas_device_set_phy(found, phy->port);
1949 if (phy->port->num_phys == 0)
1950 list_add_tail(&phy->port->del_list,
1951 &parent->port->sas_port_del_list);
1956 static int sas_discover_bfs_by_root_level(struct domain_device *root,
1959 struct expander_device *ex_root = &root->ex_dev;
1960 struct domain_device *child;
1963 list_for_each_entry(child, &ex_root->children, siblings) {
1964 if (child->dev_type == SAS_EDGE_EXPANDER_DEVICE ||
1965 child->dev_type == SAS_FANOUT_EXPANDER_DEVICE) {
1966 struct sas_expander_device *ex =
1967 rphy_to_expander_device(child->rphy);
1969 if (level > ex->level)
1970 res = sas_discover_bfs_by_root_level(child,
1972 else if (level == ex->level)
1973 res = sas_ex_discover_devices(child, -1);
1979 static int sas_discover_bfs_by_root(struct domain_device *dev)
1982 struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy);
1983 int level = ex->level+1;
1985 res = sas_ex_discover_devices(dev, -1);
1989 res = sas_discover_bfs_by_root_level(dev, level);
1992 } while (level <= dev->port->disc.max_level);
1997 static int sas_discover_new(struct domain_device *dev, int phy_id)
1999 struct ex_phy *ex_phy = &dev->ex_dev.ex_phy[phy_id];
2000 struct domain_device *child;
2003 SAS_DPRINTK("ex %016llx phy%d new device attached\n",
2004 SAS_ADDR(dev->sas_addr), phy_id);
2005 res = sas_ex_phy_discover(dev, phy_id);
2009 if (sas_ex_join_wide_port(dev, phy_id))
2012 res = sas_ex_discover_devices(dev, phy_id);
2015 list_for_each_entry(child, &dev->ex_dev.children, siblings) {
2016 if (SAS_ADDR(child->sas_addr) ==
2017 SAS_ADDR(ex_phy->attached_sas_addr)) {
2018 if (child->dev_type == SAS_EDGE_EXPANDER_DEVICE ||
2019 child->dev_type == SAS_FANOUT_EXPANDER_DEVICE)
2020 res = sas_discover_bfs_by_root(child);
2027 static bool dev_type_flutter(enum sas_device_type new, enum sas_device_type old)
2032 /* treat device directed resets as flutter, if we went
2033 * SAS_END_DEVICE to SAS_SATA_PENDING the link needs recovery
2035 if ((old == SAS_SATA_PENDING && new == SAS_END_DEVICE) ||
2036 (old == SAS_END_DEVICE && new == SAS_SATA_PENDING))
2042 static int sas_rediscover_dev(struct domain_device *dev, int phy_id, bool last)
2044 struct expander_device *ex = &dev->ex_dev;
2045 struct ex_phy *phy = &ex->ex_phy[phy_id];
2046 enum sas_device_type type = SAS_PHY_UNUSED;
2050 memset(sas_addr, 0, 8);
2051 res = sas_get_phy_attached_dev(dev, phy_id, sas_addr, &type);
2053 case SMP_RESP_NO_PHY:
2054 phy->phy_state = PHY_NOT_PRESENT;
2055 sas_unregister_devs_sas_addr(dev, phy_id, last);
2057 case SMP_RESP_PHY_VACANT:
2058 phy->phy_state = PHY_VACANT;
2059 sas_unregister_devs_sas_addr(dev, phy_id, last);
2061 case SMP_RESP_FUNC_ACC:
2069 if ((SAS_ADDR(sas_addr) == 0) || (res == -ECOMM)) {
2070 phy->phy_state = PHY_EMPTY;
2071 sas_unregister_devs_sas_addr(dev, phy_id, last);
2073 * Even though the PHY is empty, for convenience we discover
2074 * the PHY to update the PHY info, like negotiated linkrate.
2076 sas_ex_phy_discover(dev, phy_id);
2078 } else if (SAS_ADDR(sas_addr) == SAS_ADDR(phy->attached_sas_addr) &&
2079 dev_type_flutter(type, phy->attached_dev_type)) {
2080 struct domain_device *ata_dev = sas_ex_to_ata(dev, phy_id);
2083 sas_ex_phy_discover(dev, phy_id);
2085 if (ata_dev && phy->attached_dev_type == SAS_SATA_PENDING)
2086 action = ", needs recovery";
2087 SAS_DPRINTK("ex %016llx phy 0x%x broadcast flutter%s\n",
2088 SAS_ADDR(dev->sas_addr), phy_id, action);
2092 /* we always have to delete the old device when we went here */
2093 SAS_DPRINTK("ex %016llx phy 0x%x replace %016llx\n",
2094 SAS_ADDR(dev->sas_addr), phy_id,
2095 SAS_ADDR(phy->attached_sas_addr));
2096 sas_unregister_devs_sas_addr(dev, phy_id, last);
2098 return sas_discover_new(dev, phy_id);
2102 * sas_rediscover - revalidate the domain.
2103 * @dev:domain device to be detect.
2104 * @phy_id: the phy id will be detected.
2106 * NOTE: this process _must_ quit (return) as soon as any connection
2107 * errors are encountered. Connection recovery is done elsewhere.
2108 * Discover process only interrogates devices in order to discover the
2109 * domain.For plugging out, we un-register the device only when it is
2110 * the last phy in the port, for other phys in this port, we just delete it
2111 * from the port.For inserting, we do discovery when it is the
2112 * first phy,for other phys in this port, we add it to the port to
2113 * forming the wide-port.
2115 static int sas_rediscover(struct domain_device *dev, const int phy_id)
2117 struct expander_device *ex = &dev->ex_dev;
2118 struct ex_phy *changed_phy = &ex->ex_phy[phy_id];
2121 bool last = true; /* is this the last phy of the port */
2123 SAS_DPRINTK("ex %016llx phy%d originated BROADCAST(CHANGE)\n",
2124 SAS_ADDR(dev->sas_addr), phy_id);
2126 if (SAS_ADDR(changed_phy->attached_sas_addr) != 0) {
2127 for (i = 0; i < ex->num_phys; i++) {
2128 struct ex_phy *phy = &ex->ex_phy[i];
2132 if (SAS_ADDR(phy->attached_sas_addr) ==
2133 SAS_ADDR(changed_phy->attached_sas_addr)) {
2134 SAS_DPRINTK("phy%d part of wide port with "
2135 "phy%d\n", phy_id, i);
2140 res = sas_rediscover_dev(dev, phy_id, last);
2142 res = sas_discover_new(dev, phy_id);
2147 * sas_ex_revalidate_domain - revalidate the domain
2148 * @port_dev: port domain device.
2150 * NOTE: this process _must_ quit (return) as soon as any connection
2151 * errors are encountered. Connection recovery is done elsewhere.
2152 * Discover process only interrogates devices in order to discover the
2155 int sas_ex_revalidate_domain(struct domain_device *port_dev)
2158 struct domain_device *dev = NULL;
2160 res = sas_find_bcast_dev(port_dev, &dev);
2161 if (res == 0 && dev) {
2162 struct expander_device *ex = &dev->ex_dev;
2167 res = sas_find_bcast_phy(dev, &phy_id, i, true);
2170 res = sas_rediscover(dev, phy_id);
2172 } while (i < ex->num_phys);
2177 void sas_smp_handler(struct bsg_job *job, struct Scsi_Host *shost,
2178 struct sas_rphy *rphy)
2180 struct domain_device *dev;
2181 unsigned int rcvlen = 0;
2184 /* no rphy means no smp target support (ie aic94xx host) */
2186 return sas_smp_host_handler(job, shost);
2188 switch (rphy->identify.device_type) {
2189 case SAS_EDGE_EXPANDER_DEVICE:
2190 case SAS_FANOUT_EXPANDER_DEVICE:
2193 printk("%s: can we send a smp request to a device?\n",
2198 dev = sas_find_dev_by_rphy(rphy);
2200 printk("%s: fail to find a domain_device?\n", __func__);
2204 /* do we need to support multiple segments? */
2205 if (job->request_payload.sg_cnt > 1 ||
2206 job->reply_payload.sg_cnt > 1) {
2207 printk("%s: multiple segments req %u, rsp %u\n",
2208 __func__, job->request_payload.payload_len,
2209 job->reply_payload.payload_len);
2213 ret = smp_execute_task_sg(dev, job->request_payload.sg_list,
2214 job->reply_payload.sg_list);
2216 /* bsg_job_done() requires the length received */
2217 rcvlen = job->reply_payload.payload_len - ret;
2222 bsg_job_done(job, ret, rcvlen);