1 // SPDX-License-Identifier: GPL-2.0
3 * Serial Attached SCSI (SAS) Expander discovery and configuration
5 * Copyright (C) 2005 Adaptec, Inc. All rights reserved.
6 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
8 * This file is licensed under GPLv2.
11 #include <linux/scatterlist.h>
12 #include <linux/blkdev.h>
13 #include <linux/slab.h>
14 #include <asm/unaligned.h>
16 #include "sas_internal.h"
18 #include <scsi/sas_ata.h>
19 #include <scsi/scsi_transport.h>
20 #include <scsi/scsi_transport_sas.h>
21 #include "scsi_sas_internal.h"
23 static int sas_discover_expander(struct domain_device *dev);
24 static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr);
25 static int sas_configure_phy(struct domain_device *dev, int phy_id,
26 u8 *sas_addr, int include);
27 static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr);
29 /* ---------- SMP task management ---------- */
31 /* Give it some long enough timeout. In seconds. */
32 #define SMP_TIMEOUT 10
34 static int smp_execute_task_sg(struct domain_device *dev,
35 struct scatterlist *req, struct scatterlist *resp)
38 struct sas_task *task = NULL;
39 struct sas_internal *i =
40 to_sas_internal(dev->port->ha->core.shost->transportt);
41 struct sas_ha_struct *ha = dev->port->ha;
43 pm_runtime_get_sync(ha->dev);
44 mutex_lock(&dev->ex_dev.cmd_mutex);
45 for (retry = 0; retry < 3; retry++) {
46 if (test_bit(SAS_DEV_GONE, &dev->state)) {
51 task = sas_alloc_slow_task(GFP_KERNEL);
57 task->task_proto = dev->tproto;
58 task->smp_task.smp_req = *req;
59 task->smp_task.smp_resp = *resp;
61 task->task_done = sas_task_internal_done;
63 task->slow_task->timer.function = sas_task_internal_timedout;
64 task->slow_task->timer.expires = jiffies + SMP_TIMEOUT*HZ;
65 add_timer(&task->slow_task->timer);
67 res = i->dft->lldd_execute_task(task, GFP_KERNEL);
70 del_timer(&task->slow_task->timer);
71 pr_notice("executing SMP task failed:%d\n", res);
75 wait_for_completion(&task->slow_task->completion);
77 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
78 pr_notice("smp task timed out or aborted\n");
79 i->dft->lldd_abort_task(task);
80 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
81 pr_notice("SMP task aborted and not done\n");
85 if (task->task_status.resp == SAS_TASK_COMPLETE &&
86 task->task_status.stat == SAS_SAM_STAT_GOOD) {
90 if (task->task_status.resp == SAS_TASK_COMPLETE &&
91 task->task_status.stat == SAS_DATA_UNDERRUN) {
92 /* no error, but return the number of bytes of
94 res = task->task_status.residual;
97 if (task->task_status.resp == SAS_TASK_COMPLETE &&
98 task->task_status.stat == SAS_DATA_OVERRUN) {
102 if (task->task_status.resp == SAS_TASK_UNDELIVERED &&
103 task->task_status.stat == SAS_DEVICE_UNKNOWN)
106 pr_notice("%s: task to dev %016llx response: 0x%x status 0x%x\n",
108 SAS_ADDR(dev->sas_addr),
109 task->task_status.resp,
110 task->task_status.stat);
115 mutex_unlock(&dev->ex_dev.cmd_mutex);
116 pm_runtime_put_sync(ha->dev);
118 BUG_ON(retry == 3 && task != NULL);
123 static int smp_execute_task(struct domain_device *dev, void *req, int req_size,
124 void *resp, int resp_size)
126 struct scatterlist req_sg;
127 struct scatterlist resp_sg;
129 sg_init_one(&req_sg, req, req_size);
130 sg_init_one(&resp_sg, resp, resp_size);
131 return smp_execute_task_sg(dev, &req_sg, &resp_sg);
134 /* ---------- Allocations ---------- */
136 static inline void *alloc_smp_req(int size)
138 u8 *p = kzalloc(size, GFP_KERNEL);
144 static inline void *alloc_smp_resp(int size)
146 return kzalloc(size, GFP_KERNEL);
149 static char sas_route_char(struct domain_device *dev, struct ex_phy *phy)
151 switch (phy->routing_attr) {
153 if (dev->ex_dev.t2t_supp)
159 case SUBTRACTIVE_ROUTING:
166 static enum sas_device_type to_dev_type(struct discover_resp *dr)
168 /* This is detecting a failure to transmit initial dev to host
169 * FIS as described in section J.5 of sas-2 r16
171 if (dr->attached_dev_type == SAS_PHY_UNUSED && dr->attached_sata_dev &&
172 dr->linkrate >= SAS_LINK_RATE_1_5_GBPS)
173 return SAS_SATA_PENDING;
175 return dr->attached_dev_type;
178 static void sas_set_ex_phy(struct domain_device *dev, int phy_id, void *rsp)
180 enum sas_device_type dev_type;
181 enum sas_linkrate linkrate;
182 u8 sas_addr[SAS_ADDR_SIZE];
183 struct smp_resp *resp = rsp;
184 struct discover_resp *dr = &resp->disc;
185 struct sas_ha_struct *ha = dev->port->ha;
186 struct expander_device *ex = &dev->ex_dev;
187 struct ex_phy *phy = &ex->ex_phy[phy_id];
188 struct sas_rphy *rphy = dev->rphy;
189 bool new_phy = !phy->phy;
193 if (WARN_ON_ONCE(test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state)))
195 phy->phy = sas_phy_alloc(&rphy->dev, phy_id);
197 /* FIXME: error_handling */
201 switch (resp->result) {
202 case SMP_RESP_PHY_VACANT:
203 phy->phy_state = PHY_VACANT;
206 phy->phy_state = PHY_NOT_PRESENT;
208 case SMP_RESP_FUNC_ACC:
209 phy->phy_state = PHY_EMPTY; /* do not know yet */
213 /* check if anything important changed to squelch debug */
214 dev_type = phy->attached_dev_type;
215 linkrate = phy->linkrate;
216 memcpy(sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
218 /* Handle vacant phy - rest of dr data is not valid so skip it */
219 if (phy->phy_state == PHY_VACANT) {
220 memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
221 phy->attached_dev_type = SAS_PHY_UNUSED;
222 if (!test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state)) {
223 phy->phy_id = phy_id;
229 phy->attached_dev_type = to_dev_type(dr);
230 if (test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state))
232 phy->phy_id = phy_id;
233 phy->linkrate = dr->linkrate;
234 phy->attached_sata_host = dr->attached_sata_host;
235 phy->attached_sata_dev = dr->attached_sata_dev;
236 phy->attached_sata_ps = dr->attached_sata_ps;
237 phy->attached_iproto = dr->iproto << 1;
238 phy->attached_tproto = dr->tproto << 1;
239 /* help some expanders that fail to zero sas_address in the 'no
242 if (phy->attached_dev_type == SAS_PHY_UNUSED ||
243 phy->linkrate < SAS_LINK_RATE_1_5_GBPS)
244 memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
246 memcpy(phy->attached_sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE);
247 phy->attached_phy_id = dr->attached_phy_id;
248 phy->phy_change_count = dr->change_count;
249 phy->routing_attr = dr->routing_attr;
250 phy->virtual = dr->virtual;
251 phy->last_da_index = -1;
253 phy->phy->identify.sas_address = SAS_ADDR(phy->attached_sas_addr);
254 phy->phy->identify.device_type = dr->attached_dev_type;
255 phy->phy->identify.initiator_port_protocols = phy->attached_iproto;
256 phy->phy->identify.target_port_protocols = phy->attached_tproto;
257 if (!phy->attached_tproto && dr->attached_sata_dev)
258 phy->phy->identify.target_port_protocols = SAS_PROTOCOL_SATA;
259 phy->phy->identify.phy_identifier = phy_id;
260 phy->phy->minimum_linkrate_hw = dr->hmin_linkrate;
261 phy->phy->maximum_linkrate_hw = dr->hmax_linkrate;
262 phy->phy->minimum_linkrate = dr->pmin_linkrate;
263 phy->phy->maximum_linkrate = dr->pmax_linkrate;
264 phy->phy->negotiated_linkrate = phy->linkrate;
265 phy->phy->enabled = (phy->linkrate != SAS_PHY_DISABLED);
269 if (sas_phy_add(phy->phy)) {
270 sas_phy_free(phy->phy);
275 switch (phy->attached_dev_type) {
276 case SAS_SATA_PENDING:
277 type = "stp pending";
283 if (phy->attached_iproto) {
284 if (phy->attached_tproto)
285 type = "host+target";
289 if (dr->attached_sata_dev)
295 case SAS_EDGE_EXPANDER_DEVICE:
296 case SAS_FANOUT_EXPANDER_DEVICE:
303 /* this routine is polled by libata error recovery so filter
304 * unimportant messages
306 if (new_phy || phy->attached_dev_type != dev_type ||
307 phy->linkrate != linkrate ||
308 SAS_ADDR(phy->attached_sas_addr) != SAS_ADDR(sas_addr))
313 /* if the attached device type changed and ata_eh is active,
314 * make sure we run revalidation when eh completes (see:
315 * sas_enable_revalidation)
317 if (test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state))
318 set_bit(DISCE_REVALIDATE_DOMAIN, &dev->port->disc.pending);
320 pr_debug("%sex %016llx phy%02d:%c:%X attached: %016llx (%s)\n",
321 test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state) ? "ata: " : "",
322 SAS_ADDR(dev->sas_addr), phy->phy_id,
323 sas_route_char(dev, phy), phy->linkrate,
324 SAS_ADDR(phy->attached_sas_addr), type);
327 /* check if we have an existing attached ata device on this expander phy */
328 struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id)
330 struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy_id];
331 struct domain_device *dev;
332 struct sas_rphy *rphy;
337 rphy = ex_phy->port->rphy;
341 dev = sas_find_dev_by_rphy(rphy);
343 if (dev && dev_is_sata(dev))
349 #define DISCOVER_REQ_SIZE 16
350 #define DISCOVER_RESP_SIZE 56
352 static int sas_ex_phy_discover_helper(struct domain_device *dev, u8 *disc_req,
353 u8 *disc_resp, int single)
355 struct discover_resp *dr;
358 disc_req[9] = single;
360 res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE,
361 disc_resp, DISCOVER_RESP_SIZE);
364 dr = &((struct smp_resp *)disc_resp)->disc;
365 if (memcmp(dev->sas_addr, dr->attached_sas_addr, SAS_ADDR_SIZE) == 0) {
366 pr_notice("Found loopback topology, just ignore it!\n");
369 sas_set_ex_phy(dev, single, disc_resp);
373 int sas_ex_phy_discover(struct domain_device *dev, int single)
375 struct expander_device *ex = &dev->ex_dev;
380 disc_req = alloc_smp_req(DISCOVER_REQ_SIZE);
384 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
390 disc_req[1] = SMP_DISCOVER;
392 if (0 <= single && single < ex->num_phys) {
393 res = sas_ex_phy_discover_helper(dev, disc_req, disc_resp, single);
397 for (i = 0; i < ex->num_phys; i++) {
398 res = sas_ex_phy_discover_helper(dev, disc_req,
410 static int sas_expander_discover(struct domain_device *dev)
412 struct expander_device *ex = &dev->ex_dev;
415 ex->ex_phy = kcalloc(ex->num_phys, sizeof(*ex->ex_phy), GFP_KERNEL);
419 res = sas_ex_phy_discover(dev, -1);
430 #define MAX_EXPANDER_PHYS 128
432 static void ex_assign_report_general(struct domain_device *dev,
433 struct smp_resp *resp)
435 struct report_general_resp *rg = &resp->rg;
437 dev->ex_dev.ex_change_count = be16_to_cpu(rg->change_count);
438 dev->ex_dev.max_route_indexes = be16_to_cpu(rg->route_indexes);
439 dev->ex_dev.num_phys = min(rg->num_phys, (u8)MAX_EXPANDER_PHYS);
440 dev->ex_dev.t2t_supp = rg->t2t_supp;
441 dev->ex_dev.conf_route_table = rg->conf_route_table;
442 dev->ex_dev.configuring = rg->configuring;
443 memcpy(dev->ex_dev.enclosure_logical_id, rg->enclosure_logical_id, 8);
446 #define RG_REQ_SIZE 8
447 #define RG_RESP_SIZE 32
449 static int sas_ex_general(struct domain_device *dev)
452 struct smp_resp *rg_resp;
456 rg_req = alloc_smp_req(RG_REQ_SIZE);
460 rg_resp = alloc_smp_resp(RG_RESP_SIZE);
466 rg_req[1] = SMP_REPORT_GENERAL;
468 for (i = 0; i < 5; i++) {
469 res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp,
473 pr_notice("RG to ex %016llx failed:0x%x\n",
474 SAS_ADDR(dev->sas_addr), res);
476 } else if (rg_resp->result != SMP_RESP_FUNC_ACC) {
477 pr_debug("RG:ex %016llx returned SMP result:0x%x\n",
478 SAS_ADDR(dev->sas_addr), rg_resp->result);
479 res = rg_resp->result;
483 ex_assign_report_general(dev, rg_resp);
485 if (dev->ex_dev.configuring) {
486 pr_debug("RG: ex %016llx self-configuring...\n",
487 SAS_ADDR(dev->sas_addr));
488 schedule_timeout_interruptible(5*HZ);
498 static void ex_assign_manuf_info(struct domain_device *dev, void
501 u8 *mi_resp = _mi_resp;
502 struct sas_rphy *rphy = dev->rphy;
503 struct sas_expander_device *edev = rphy_to_expander_device(rphy);
505 memcpy(edev->vendor_id, mi_resp + 12, SAS_EXPANDER_VENDOR_ID_LEN);
506 memcpy(edev->product_id, mi_resp + 20, SAS_EXPANDER_PRODUCT_ID_LEN);
507 memcpy(edev->product_rev, mi_resp + 36,
508 SAS_EXPANDER_PRODUCT_REV_LEN);
510 if (mi_resp[8] & 1) {
511 memcpy(edev->component_vendor_id, mi_resp + 40,
512 SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN);
513 edev->component_id = mi_resp[48] << 8 | mi_resp[49];
514 edev->component_revision_id = mi_resp[50];
518 #define MI_REQ_SIZE 8
519 #define MI_RESP_SIZE 64
521 static int sas_ex_manuf_info(struct domain_device *dev)
527 mi_req = alloc_smp_req(MI_REQ_SIZE);
531 mi_resp = alloc_smp_resp(MI_RESP_SIZE);
537 mi_req[1] = SMP_REPORT_MANUF_INFO;
539 res = smp_execute_task(dev, mi_req, MI_REQ_SIZE, mi_resp, MI_RESP_SIZE);
541 pr_notice("MI: ex %016llx failed:0x%x\n",
542 SAS_ADDR(dev->sas_addr), res);
544 } else if (mi_resp[2] != SMP_RESP_FUNC_ACC) {
545 pr_debug("MI ex %016llx returned SMP result:0x%x\n",
546 SAS_ADDR(dev->sas_addr), mi_resp[2]);
550 ex_assign_manuf_info(dev, mi_resp);
557 #define PC_REQ_SIZE 44
558 #define PC_RESP_SIZE 8
560 int sas_smp_phy_control(struct domain_device *dev, int phy_id,
561 enum phy_func phy_func,
562 struct sas_phy_linkrates *rates)
568 pc_req = alloc_smp_req(PC_REQ_SIZE);
572 pc_resp = alloc_smp_resp(PC_RESP_SIZE);
578 pc_req[1] = SMP_PHY_CONTROL;
580 pc_req[10] = phy_func;
582 pc_req[32] = rates->minimum_linkrate << 4;
583 pc_req[33] = rates->maximum_linkrate << 4;
586 res = smp_execute_task(dev, pc_req, PC_REQ_SIZE, pc_resp, PC_RESP_SIZE);
588 pr_err("ex %016llx phy%02d PHY control failed: %d\n",
589 SAS_ADDR(dev->sas_addr), phy_id, res);
590 } else if (pc_resp[2] != SMP_RESP_FUNC_ACC) {
591 pr_err("ex %016llx phy%02d PHY control failed: function result 0x%x\n",
592 SAS_ADDR(dev->sas_addr), phy_id, pc_resp[2]);
600 static void sas_ex_disable_phy(struct domain_device *dev, int phy_id)
602 struct expander_device *ex = &dev->ex_dev;
603 struct ex_phy *phy = &ex->ex_phy[phy_id];
605 sas_smp_phy_control(dev, phy_id, PHY_FUNC_DISABLE, NULL);
606 phy->linkrate = SAS_PHY_DISABLED;
609 static void sas_ex_disable_port(struct domain_device *dev, u8 *sas_addr)
611 struct expander_device *ex = &dev->ex_dev;
614 for (i = 0; i < ex->num_phys; i++) {
615 struct ex_phy *phy = &ex->ex_phy[i];
617 if (phy->phy_state == PHY_VACANT ||
618 phy->phy_state == PHY_NOT_PRESENT)
621 if (SAS_ADDR(phy->attached_sas_addr) == SAS_ADDR(sas_addr))
622 sas_ex_disable_phy(dev, i);
626 static int sas_dev_present_in_domain(struct asd_sas_port *port,
629 struct domain_device *dev;
631 if (SAS_ADDR(port->sas_addr) == SAS_ADDR(sas_addr))
633 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
634 if (SAS_ADDR(dev->sas_addr) == SAS_ADDR(sas_addr))
640 #define RPEL_REQ_SIZE 16
641 #define RPEL_RESP_SIZE 32
642 int sas_smp_get_phy_events(struct sas_phy *phy)
647 struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent);
648 struct domain_device *dev = sas_find_dev_by_rphy(rphy);
650 req = alloc_smp_req(RPEL_REQ_SIZE);
654 resp = alloc_smp_resp(RPEL_RESP_SIZE);
660 req[1] = SMP_REPORT_PHY_ERR_LOG;
661 req[9] = phy->number;
663 res = smp_execute_task(dev, req, RPEL_REQ_SIZE,
664 resp, RPEL_RESP_SIZE);
669 phy->invalid_dword_count = get_unaligned_be32(&resp[12]);
670 phy->running_disparity_error_count = get_unaligned_be32(&resp[16]);
671 phy->loss_of_dword_sync_count = get_unaligned_be32(&resp[20]);
672 phy->phy_reset_problem_count = get_unaligned_be32(&resp[24]);
681 #ifdef CONFIG_SCSI_SAS_ATA
683 #define RPS_REQ_SIZE 16
684 #define RPS_RESP_SIZE 60
686 int sas_get_report_phy_sata(struct domain_device *dev, int phy_id,
687 struct smp_resp *rps_resp)
690 u8 *rps_req = alloc_smp_req(RPS_REQ_SIZE);
691 u8 *resp = (u8 *)rps_resp;
696 rps_req[1] = SMP_REPORT_PHY_SATA;
699 res = smp_execute_task(dev, rps_req, RPS_REQ_SIZE,
700 rps_resp, RPS_RESP_SIZE);
702 /* 0x34 is the FIS type for the D2H fis. There's a potential
703 * standards cockup here. sas-2 explicitly specifies the FIS
704 * should be encoded so that FIS type is in resp[24].
705 * However, some expanders endian reverse this. Undo the
707 if (!res && resp[27] == 0x34 && resp[24] != 0x34) {
710 for (i = 0; i < 5; i++) {
715 resp[j + 0] = resp[j + 3];
716 resp[j + 1] = resp[j + 2];
727 static void sas_ex_get_linkrate(struct domain_device *parent,
728 struct domain_device *child,
729 struct ex_phy *parent_phy)
731 struct expander_device *parent_ex = &parent->ex_dev;
732 struct sas_port *port;
737 port = parent_phy->port;
739 for (i = 0; i < parent_ex->num_phys; i++) {
740 struct ex_phy *phy = &parent_ex->ex_phy[i];
742 if (phy->phy_state == PHY_VACANT ||
743 phy->phy_state == PHY_NOT_PRESENT)
746 if (SAS_ADDR(phy->attached_sas_addr) ==
747 SAS_ADDR(child->sas_addr)) {
749 child->min_linkrate = min(parent->min_linkrate,
751 child->max_linkrate = max(parent->max_linkrate,
754 sas_port_add_phy(port, phy->phy);
757 child->linkrate = min(parent_phy->linkrate, child->max_linkrate);
758 child->pathways = min(child->pathways, parent->pathways);
761 static struct domain_device *sas_ex_discover_end_dev(
762 struct domain_device *parent, int phy_id)
764 struct expander_device *parent_ex = &parent->ex_dev;
765 struct ex_phy *phy = &parent_ex->ex_phy[phy_id];
766 struct domain_device *child = NULL;
767 struct sas_rphy *rphy;
770 if (phy->attached_sata_host || phy->attached_sata_ps)
773 child = sas_alloc_device();
777 kref_get(&parent->kref);
778 child->parent = parent;
779 child->port = parent->port;
780 child->iproto = phy->attached_iproto;
781 memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
782 sas_hash_addr(child->hashed_sas_addr, child->sas_addr);
784 phy->port = sas_port_alloc(&parent->rphy->dev, phy_id);
785 if (unlikely(!phy->port))
787 if (unlikely(sas_port_add(phy->port) != 0)) {
788 sas_port_free(phy->port);
792 sas_ex_get_linkrate(parent, child, phy);
793 sas_device_set_phy(child, phy->port);
795 #ifdef CONFIG_SCSI_SAS_ATA
796 if ((phy->attached_tproto & SAS_PROTOCOL_STP) || phy->attached_sata_dev) {
797 if (child->linkrate > parent->min_linkrate) {
798 struct sas_phy *cphy = child->phy;
799 enum sas_linkrate min_prate = cphy->minimum_linkrate,
800 parent_min_lrate = parent->min_linkrate,
801 min_linkrate = (min_prate > parent_min_lrate) ?
802 parent_min_lrate : 0;
803 struct sas_phy_linkrates rates = {
804 .maximum_linkrate = parent->min_linkrate,
805 .minimum_linkrate = min_linkrate,
809 pr_notice("ex %016llx phy%02d SATA device linkrate > min pathway connection rate, attempting to lower device linkrate\n",
810 SAS_ADDR(child->sas_addr), phy_id);
811 ret = sas_smp_phy_control(parent, phy_id,
812 PHY_FUNC_LINK_RESET, &rates);
814 pr_err("ex %016llx phy%02d SATA device could not set linkrate (%d)\n",
815 SAS_ADDR(child->sas_addr), phy_id, ret);
818 pr_notice("ex %016llx phy%02d SATA device set linkrate successfully\n",
819 SAS_ADDR(child->sas_addr), phy_id);
820 child->linkrate = child->min_linkrate;
822 res = sas_get_ata_info(child, phy);
827 res = sas_ata_init(child);
830 rphy = sas_end_device_alloc(phy->port);
833 rphy->identify.phy_identifier = phy_id;
836 get_device(&rphy->dev);
838 list_add_tail(&child->disco_list_node, &parent->port->disco_list);
840 res = sas_discover_sata(child);
842 pr_notice("sas_discover_sata() for device %16llx at %016llx:%02d returned 0x%x\n",
843 SAS_ADDR(child->sas_addr),
844 SAS_ADDR(parent->sas_addr), phy_id, res);
849 if (phy->attached_tproto & SAS_PROTOCOL_SSP) {
850 child->dev_type = SAS_END_DEVICE;
851 rphy = sas_end_device_alloc(phy->port);
852 /* FIXME: error handling */
855 child->tproto = phy->attached_tproto;
859 get_device(&rphy->dev);
860 rphy->identify.phy_identifier = phy_id;
861 sas_fill_in_rphy(child, rphy);
863 list_add_tail(&child->disco_list_node, &parent->port->disco_list);
865 res = sas_discover_end_dev(child);
867 pr_notice("sas_discover_end_dev() for device %016llx at %016llx:%02d returned 0x%x\n",
868 SAS_ADDR(child->sas_addr),
869 SAS_ADDR(parent->sas_addr), phy_id, res);
873 pr_notice("target proto 0x%x at %016llx:0x%x not handled\n",
874 phy->attached_tproto, SAS_ADDR(parent->sas_addr),
879 list_add_tail(&child->siblings, &parent_ex->children);
883 sas_rphy_free(child->rphy);
884 list_del(&child->disco_list_node);
885 spin_lock_irq(&parent->port->dev_list_lock);
886 list_del(&child->dev_list_node);
887 spin_unlock_irq(&parent->port->dev_list_lock);
889 sas_port_delete(phy->port);
892 sas_put_device(child);
896 /* See if this phy is part of a wide port */
897 static bool sas_ex_join_wide_port(struct domain_device *parent, int phy_id)
899 struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id];
902 for (i = 0; i < parent->ex_dev.num_phys; i++) {
903 struct ex_phy *ephy = &parent->ex_dev.ex_phy[i];
908 if (!memcmp(phy->attached_sas_addr, ephy->attached_sas_addr,
909 SAS_ADDR_SIZE) && ephy->port) {
910 sas_port_add_phy(ephy->port, phy->phy);
911 phy->port = ephy->port;
912 phy->phy_state = PHY_DEVICE_DISCOVERED;
920 static struct domain_device *sas_ex_discover_expander(
921 struct domain_device *parent, int phy_id)
923 struct sas_expander_device *parent_ex = rphy_to_expander_device(parent->rphy);
924 struct ex_phy *phy = &parent->ex_dev.ex_phy[phy_id];
925 struct domain_device *child = NULL;
926 struct sas_rphy *rphy;
927 struct sas_expander_device *edev;
928 struct asd_sas_port *port;
931 if (phy->routing_attr == DIRECT_ROUTING) {
932 pr_warn("ex %016llx:%02d:D <--> ex %016llx:0x%x is not allowed\n",
933 SAS_ADDR(parent->sas_addr), phy_id,
934 SAS_ADDR(phy->attached_sas_addr),
935 phy->attached_phy_id);
938 child = sas_alloc_device();
942 phy->port = sas_port_alloc(&parent->rphy->dev, phy_id);
943 /* FIXME: better error handling */
944 BUG_ON(sas_port_add(phy->port) != 0);
947 switch (phy->attached_dev_type) {
948 case SAS_EDGE_EXPANDER_DEVICE:
949 rphy = sas_expander_alloc(phy->port,
950 SAS_EDGE_EXPANDER_DEVICE);
952 case SAS_FANOUT_EXPANDER_DEVICE:
953 rphy = sas_expander_alloc(phy->port,
954 SAS_FANOUT_EXPANDER_DEVICE);
957 rphy = NULL; /* shut gcc up */
962 get_device(&rphy->dev);
963 edev = rphy_to_expander_device(rphy);
964 child->dev_type = phy->attached_dev_type;
965 kref_get(&parent->kref);
966 child->parent = parent;
968 child->iproto = phy->attached_iproto;
969 child->tproto = phy->attached_tproto;
970 memcpy(child->sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
971 sas_hash_addr(child->hashed_sas_addr, child->sas_addr);
972 sas_ex_get_linkrate(parent, child, phy);
973 edev->level = parent_ex->level + 1;
974 parent->port->disc.max_level = max(parent->port->disc.max_level,
977 sas_fill_in_rphy(child, rphy);
980 spin_lock_irq(&parent->port->dev_list_lock);
981 list_add_tail(&child->dev_list_node, &parent->port->dev_list);
982 spin_unlock_irq(&parent->port->dev_list_lock);
984 res = sas_discover_expander(child);
986 sas_rphy_delete(rphy);
987 spin_lock_irq(&parent->port->dev_list_lock);
988 list_del(&child->dev_list_node);
989 spin_unlock_irq(&parent->port->dev_list_lock);
990 sas_put_device(child);
991 sas_port_delete(phy->port);
995 list_add_tail(&child->siblings, &parent->ex_dev.children);
999 static int sas_ex_discover_dev(struct domain_device *dev, int phy_id)
1001 struct expander_device *ex = &dev->ex_dev;
1002 struct ex_phy *ex_phy = &ex->ex_phy[phy_id];
1003 struct domain_device *child = NULL;
1007 if (ex_phy->linkrate == SAS_SATA_SPINUP_HOLD) {
1008 if (!sas_smp_phy_control(dev, phy_id, PHY_FUNC_LINK_RESET, NULL))
1009 res = sas_ex_phy_discover(dev, phy_id);
1014 /* Parent and domain coherency */
1015 if (!dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) ==
1016 SAS_ADDR(dev->port->sas_addr))) {
1017 sas_add_parent_port(dev, phy_id);
1020 if (dev->parent && (SAS_ADDR(ex_phy->attached_sas_addr) ==
1021 SAS_ADDR(dev->parent->sas_addr))) {
1022 sas_add_parent_port(dev, phy_id);
1023 if (ex_phy->routing_attr == TABLE_ROUTING)
1024 sas_configure_phy(dev, phy_id, dev->port->sas_addr, 1);
1028 if (sas_dev_present_in_domain(dev->port, ex_phy->attached_sas_addr))
1029 sas_ex_disable_port(dev, ex_phy->attached_sas_addr);
1031 if (ex_phy->attached_dev_type == SAS_PHY_UNUSED) {
1032 if (ex_phy->routing_attr == DIRECT_ROUTING) {
1033 memset(ex_phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
1034 sas_configure_routing(dev, ex_phy->attached_sas_addr);
1037 } else if (ex_phy->linkrate == SAS_LINK_RATE_UNKNOWN)
1040 if (ex_phy->attached_dev_type != SAS_END_DEVICE &&
1041 ex_phy->attached_dev_type != SAS_FANOUT_EXPANDER_DEVICE &&
1042 ex_phy->attached_dev_type != SAS_EDGE_EXPANDER_DEVICE &&
1043 ex_phy->attached_dev_type != SAS_SATA_PENDING) {
1044 pr_warn("unknown device type(0x%x) attached to ex %016llx phy%02d\n",
1045 ex_phy->attached_dev_type,
1046 SAS_ADDR(dev->sas_addr),
1051 res = sas_configure_routing(dev, ex_phy->attached_sas_addr);
1053 pr_notice("configure routing for dev %016llx reported 0x%x. Forgotten\n",
1054 SAS_ADDR(ex_phy->attached_sas_addr), res);
1055 sas_disable_routing(dev, ex_phy->attached_sas_addr);
1059 if (sas_ex_join_wide_port(dev, phy_id)) {
1060 pr_debug("Attaching ex phy%02d to wide port %016llx\n",
1061 phy_id, SAS_ADDR(ex_phy->attached_sas_addr));
1065 switch (ex_phy->attached_dev_type) {
1066 case SAS_END_DEVICE:
1067 case SAS_SATA_PENDING:
1068 child = sas_ex_discover_end_dev(dev, phy_id);
1070 case SAS_FANOUT_EXPANDER_DEVICE:
1071 if (SAS_ADDR(dev->port->disc.fanout_sas_addr)) {
1072 pr_debug("second fanout expander %016llx phy%02d attached to ex %016llx phy%02d\n",
1073 SAS_ADDR(ex_phy->attached_sas_addr),
1074 ex_phy->attached_phy_id,
1075 SAS_ADDR(dev->sas_addr),
1077 sas_ex_disable_phy(dev, phy_id);
1080 memcpy(dev->port->disc.fanout_sas_addr,
1081 ex_phy->attached_sas_addr, SAS_ADDR_SIZE);
1083 case SAS_EDGE_EXPANDER_DEVICE:
1084 child = sas_ex_discover_expander(dev, phy_id);
1091 pr_notice("ex %016llx phy%02d failed to discover\n",
1092 SAS_ADDR(dev->sas_addr), phy_id);
1096 static int sas_find_sub_addr(struct domain_device *dev, u8 *sub_addr)
1098 struct expander_device *ex = &dev->ex_dev;
1101 for (i = 0; i < ex->num_phys; i++) {
1102 struct ex_phy *phy = &ex->ex_phy[i];
1104 if (phy->phy_state == PHY_VACANT ||
1105 phy->phy_state == PHY_NOT_PRESENT)
1108 if (dev_is_expander(phy->attached_dev_type) &&
1109 phy->routing_attr == SUBTRACTIVE_ROUTING) {
1111 memcpy(sub_addr, phy->attached_sas_addr, SAS_ADDR_SIZE);
1119 static int sas_check_level_subtractive_boundary(struct domain_device *dev)
1121 struct expander_device *ex = &dev->ex_dev;
1122 struct domain_device *child;
1123 u8 sub_addr[SAS_ADDR_SIZE] = {0, };
1125 list_for_each_entry(child, &ex->children, siblings) {
1126 if (!dev_is_expander(child->dev_type))
1128 if (sub_addr[0] == 0) {
1129 sas_find_sub_addr(child, sub_addr);
1132 u8 s2[SAS_ADDR_SIZE];
1134 if (sas_find_sub_addr(child, s2) &&
1135 (SAS_ADDR(sub_addr) != SAS_ADDR(s2))) {
1137 pr_notice("ex %016llx->%016llx-?->%016llx diverges from subtractive boundary %016llx\n",
1138 SAS_ADDR(dev->sas_addr),
1139 SAS_ADDR(child->sas_addr),
1141 SAS_ADDR(sub_addr));
1143 sas_ex_disable_port(child, s2);
1150 * sas_ex_discover_devices - discover devices attached to this expander
1151 * @dev: pointer to the expander domain device
1152 * @single: if you want to do a single phy, else set to -1;
1154 * Configure this expander for use with its devices and register the
1155 * devices of this expander.
1157 static int sas_ex_discover_devices(struct domain_device *dev, int single)
1159 struct expander_device *ex = &dev->ex_dev;
1160 int i = 0, end = ex->num_phys;
1163 if (0 <= single && single < end) {
1168 for ( ; i < end; i++) {
1169 struct ex_phy *ex_phy = &ex->ex_phy[i];
1171 if (ex_phy->phy_state == PHY_VACANT ||
1172 ex_phy->phy_state == PHY_NOT_PRESENT ||
1173 ex_phy->phy_state == PHY_DEVICE_DISCOVERED)
1176 switch (ex_phy->linkrate) {
1177 case SAS_PHY_DISABLED:
1178 case SAS_PHY_RESET_PROBLEM:
1179 case SAS_SATA_PORT_SELECTOR:
1182 res = sas_ex_discover_dev(dev, i);
1190 sas_check_level_subtractive_boundary(dev);
1195 static int sas_check_ex_subtractive_boundary(struct domain_device *dev)
1197 struct expander_device *ex = &dev->ex_dev;
1199 u8 *sub_sas_addr = NULL;
1201 if (dev->dev_type != SAS_EDGE_EXPANDER_DEVICE)
1204 for (i = 0; i < ex->num_phys; i++) {
1205 struct ex_phy *phy = &ex->ex_phy[i];
1207 if (phy->phy_state == PHY_VACANT ||
1208 phy->phy_state == PHY_NOT_PRESENT)
1211 if (dev_is_expander(phy->attached_dev_type) &&
1212 phy->routing_attr == SUBTRACTIVE_ROUTING) {
1215 sub_sas_addr = &phy->attached_sas_addr[0];
1216 else if (SAS_ADDR(sub_sas_addr) !=
1217 SAS_ADDR(phy->attached_sas_addr)) {
1219 pr_notice("ex %016llx phy%02d diverges(%016llx) on subtractive boundary(%016llx). Disabled\n",
1220 SAS_ADDR(dev->sas_addr), i,
1221 SAS_ADDR(phy->attached_sas_addr),
1222 SAS_ADDR(sub_sas_addr));
1223 sas_ex_disable_phy(dev, i);
1230 static void sas_print_parent_topology_bug(struct domain_device *child,
1231 struct ex_phy *parent_phy,
1232 struct ex_phy *child_phy)
1234 static const char *ex_type[] = {
1235 [SAS_EDGE_EXPANDER_DEVICE] = "edge",
1236 [SAS_FANOUT_EXPANDER_DEVICE] = "fanout",
1238 struct domain_device *parent = child->parent;
1240 pr_notice("%s ex %016llx phy%02d <--> %s ex %016llx phy%02d has %c:%c routing link!\n",
1241 ex_type[parent->dev_type],
1242 SAS_ADDR(parent->sas_addr),
1245 ex_type[child->dev_type],
1246 SAS_ADDR(child->sas_addr),
1249 sas_route_char(parent, parent_phy),
1250 sas_route_char(child, child_phy));
1253 static int sas_check_eeds(struct domain_device *child,
1254 struct ex_phy *parent_phy,
1255 struct ex_phy *child_phy)
1258 struct domain_device *parent = child->parent;
1260 if (SAS_ADDR(parent->port->disc.fanout_sas_addr) != 0) {
1262 pr_warn("edge ex %016llx phy S:%02d <--> edge ex %016llx phy S:%02d, while there is a fanout ex %016llx\n",
1263 SAS_ADDR(parent->sas_addr),
1265 SAS_ADDR(child->sas_addr),
1267 SAS_ADDR(parent->port->disc.fanout_sas_addr));
1268 } else if (SAS_ADDR(parent->port->disc.eeds_a) == 0) {
1269 memcpy(parent->port->disc.eeds_a, parent->sas_addr,
1271 memcpy(parent->port->disc.eeds_b, child->sas_addr,
1273 } else if (((SAS_ADDR(parent->port->disc.eeds_a) ==
1274 SAS_ADDR(parent->sas_addr)) ||
1275 (SAS_ADDR(parent->port->disc.eeds_a) ==
1276 SAS_ADDR(child->sas_addr)))
1278 ((SAS_ADDR(parent->port->disc.eeds_b) ==
1279 SAS_ADDR(parent->sas_addr)) ||
1280 (SAS_ADDR(parent->port->disc.eeds_b) ==
1281 SAS_ADDR(child->sas_addr))))
1285 pr_warn("edge ex %016llx phy%02d <--> edge ex %016llx phy%02d link forms a third EEDS!\n",
1286 SAS_ADDR(parent->sas_addr),
1288 SAS_ADDR(child->sas_addr),
1295 /* Here we spill over 80 columns. It is intentional.
1297 static int sas_check_parent_topology(struct domain_device *child)
1299 struct expander_device *child_ex = &child->ex_dev;
1300 struct expander_device *parent_ex;
1307 if (!dev_is_expander(child->parent->dev_type))
1310 parent_ex = &child->parent->ex_dev;
1312 for (i = 0; i < parent_ex->num_phys; i++) {
1313 struct ex_phy *parent_phy = &parent_ex->ex_phy[i];
1314 struct ex_phy *child_phy;
1316 if (parent_phy->phy_state == PHY_VACANT ||
1317 parent_phy->phy_state == PHY_NOT_PRESENT)
1320 if (SAS_ADDR(parent_phy->attached_sas_addr) != SAS_ADDR(child->sas_addr))
1323 child_phy = &child_ex->ex_phy[parent_phy->attached_phy_id];
1325 switch (child->parent->dev_type) {
1326 case SAS_EDGE_EXPANDER_DEVICE:
1327 if (child->dev_type == SAS_FANOUT_EXPANDER_DEVICE) {
1328 if (parent_phy->routing_attr != SUBTRACTIVE_ROUTING ||
1329 child_phy->routing_attr != TABLE_ROUTING) {
1330 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1333 } else if (parent_phy->routing_attr == SUBTRACTIVE_ROUTING) {
1334 if (child_phy->routing_attr == SUBTRACTIVE_ROUTING) {
1335 res = sas_check_eeds(child, parent_phy, child_phy);
1336 } else if (child_phy->routing_attr != TABLE_ROUTING) {
1337 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1340 } else if (parent_phy->routing_attr == TABLE_ROUTING) {
1341 if (child_phy->routing_attr == SUBTRACTIVE_ROUTING ||
1342 (child_phy->routing_attr == TABLE_ROUTING &&
1343 child_ex->t2t_supp && parent_ex->t2t_supp)) {
1346 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1351 case SAS_FANOUT_EXPANDER_DEVICE:
1352 if (parent_phy->routing_attr != TABLE_ROUTING ||
1353 child_phy->routing_attr != SUBTRACTIVE_ROUTING) {
1354 sas_print_parent_topology_bug(child, parent_phy, child_phy);
1366 #define RRI_REQ_SIZE 16
1367 #define RRI_RESP_SIZE 44
1369 static int sas_configure_present(struct domain_device *dev, int phy_id,
1370 u8 *sas_addr, int *index, int *present)
1373 struct expander_device *ex = &dev->ex_dev;
1374 struct ex_phy *phy = &ex->ex_phy[phy_id];
1381 rri_req = alloc_smp_req(RRI_REQ_SIZE);
1385 rri_resp = alloc_smp_resp(RRI_RESP_SIZE);
1391 rri_req[1] = SMP_REPORT_ROUTE_INFO;
1392 rri_req[9] = phy_id;
1394 for (i = 0; i < ex->max_route_indexes ; i++) {
1395 *(__be16 *)(rri_req+6) = cpu_to_be16(i);
1396 res = smp_execute_task(dev, rri_req, RRI_REQ_SIZE, rri_resp,
1401 if (res == SMP_RESP_NO_INDEX) {
1402 pr_warn("overflow of indexes: dev %016llx phy%02d index 0x%x\n",
1403 SAS_ADDR(dev->sas_addr), phy_id, i);
1405 } else if (res != SMP_RESP_FUNC_ACC) {
1406 pr_notice("%s: dev %016llx phy%02d index 0x%x result 0x%x\n",
1407 __func__, SAS_ADDR(dev->sas_addr), phy_id,
1411 if (SAS_ADDR(sas_addr) != 0) {
1412 if (SAS_ADDR(rri_resp+16) == SAS_ADDR(sas_addr)) {
1414 if ((rri_resp[12] & 0x80) == 0x80)
1419 } else if (SAS_ADDR(rri_resp+16) == 0) {
1424 } else if (SAS_ADDR(rri_resp+16) == 0 &&
1425 phy->last_da_index < i) {
1426 phy->last_da_index = i;
1439 #define CRI_REQ_SIZE 44
1440 #define CRI_RESP_SIZE 8
1442 static int sas_configure_set(struct domain_device *dev, int phy_id,
1443 u8 *sas_addr, int index, int include)
1449 cri_req = alloc_smp_req(CRI_REQ_SIZE);
1453 cri_resp = alloc_smp_resp(CRI_RESP_SIZE);
1459 cri_req[1] = SMP_CONF_ROUTE_INFO;
1460 *(__be16 *)(cri_req+6) = cpu_to_be16(index);
1461 cri_req[9] = phy_id;
1462 if (SAS_ADDR(sas_addr) == 0 || !include)
1463 cri_req[12] |= 0x80;
1464 memcpy(cri_req+16, sas_addr, SAS_ADDR_SIZE);
1466 res = smp_execute_task(dev, cri_req, CRI_REQ_SIZE, cri_resp,
1471 if (res == SMP_RESP_NO_INDEX) {
1472 pr_warn("overflow of indexes: dev %016llx phy%02d index 0x%x\n",
1473 SAS_ADDR(dev->sas_addr), phy_id, index);
1481 static int sas_configure_phy(struct domain_device *dev, int phy_id,
1482 u8 *sas_addr, int include)
1488 res = sas_configure_present(dev, phy_id, sas_addr, &index, &present);
1491 if (include ^ present)
1492 return sas_configure_set(dev, phy_id, sas_addr, index,
1499 * sas_configure_parent - configure routing table of parent
1500 * @parent: parent expander
1501 * @child: child expander
1502 * @sas_addr: SAS port identifier of device directly attached to child
1503 * @include: whether or not to include @child in the expander routing table
1505 static int sas_configure_parent(struct domain_device *parent,
1506 struct domain_device *child,
1507 u8 *sas_addr, int include)
1509 struct expander_device *ex_parent = &parent->ex_dev;
1513 if (parent->parent) {
1514 res = sas_configure_parent(parent->parent, parent, sas_addr,
1520 if (ex_parent->conf_route_table == 0) {
1521 pr_debug("ex %016llx has self-configuring routing table\n",
1522 SAS_ADDR(parent->sas_addr));
1526 for (i = 0; i < ex_parent->num_phys; i++) {
1527 struct ex_phy *phy = &ex_parent->ex_phy[i];
1529 if ((phy->routing_attr == TABLE_ROUTING) &&
1530 (SAS_ADDR(phy->attached_sas_addr) ==
1531 SAS_ADDR(child->sas_addr))) {
1532 res = sas_configure_phy(parent, i, sas_addr, include);
1542 * sas_configure_routing - configure routing
1543 * @dev: expander device
1544 * @sas_addr: port identifier of device directly attached to the expander device
1546 static int sas_configure_routing(struct domain_device *dev, u8 *sas_addr)
1549 return sas_configure_parent(dev->parent, dev, sas_addr, 1);
1553 static int sas_disable_routing(struct domain_device *dev, u8 *sas_addr)
1556 return sas_configure_parent(dev->parent, dev, sas_addr, 0);
1561 * sas_discover_expander - expander discovery
1562 * @dev: pointer to expander domain device
1564 * See comment in sas_discover_sata().
1566 static int sas_discover_expander(struct domain_device *dev)
1570 res = sas_notify_lldd_dev_found(dev);
1574 res = sas_ex_general(dev);
1577 res = sas_ex_manuf_info(dev);
1581 res = sas_expander_discover(dev);
1583 pr_warn("expander %016llx discovery failed(0x%x)\n",
1584 SAS_ADDR(dev->sas_addr), res);
1588 sas_check_ex_subtractive_boundary(dev);
1589 res = sas_check_parent_topology(dev);
1594 sas_notify_lldd_dev_gone(dev);
1598 static int sas_ex_level_discovery(struct asd_sas_port *port, const int level)
1601 struct domain_device *dev;
1603 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
1604 if (dev_is_expander(dev->dev_type)) {
1605 struct sas_expander_device *ex =
1606 rphy_to_expander_device(dev->rphy);
1608 if (level == ex->level)
1609 res = sas_ex_discover_devices(dev, -1);
1611 res = sas_ex_discover_devices(port->port_dev, -1);
1619 static int sas_ex_bfs_disc(struct asd_sas_port *port)
1625 level = port->disc.max_level;
1626 res = sas_ex_level_discovery(port, level);
1628 } while (level < port->disc.max_level);
1633 int sas_discover_root_expander(struct domain_device *dev)
1636 struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy);
1638 res = sas_rphy_add(dev->rphy);
1642 ex->level = dev->port->disc.max_level; /* 0 */
1643 res = sas_discover_expander(dev);
1647 sas_ex_bfs_disc(dev->port);
1652 sas_rphy_remove(dev->rphy);
1657 /* ---------- Domain revalidation ---------- */
1659 static int sas_get_phy_discover(struct domain_device *dev,
1660 int phy_id, struct smp_resp *disc_resp)
1665 disc_req = alloc_smp_req(DISCOVER_REQ_SIZE);
1669 disc_req[1] = SMP_DISCOVER;
1670 disc_req[9] = phy_id;
1672 res = smp_execute_task(dev, disc_req, DISCOVER_REQ_SIZE,
1673 disc_resp, DISCOVER_RESP_SIZE);
1676 else if (disc_resp->result != SMP_RESP_FUNC_ACC) {
1677 res = disc_resp->result;
1685 static int sas_get_phy_change_count(struct domain_device *dev,
1686 int phy_id, int *pcc)
1689 struct smp_resp *disc_resp;
1691 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
1695 res = sas_get_phy_discover(dev, phy_id, disc_resp);
1697 *pcc = disc_resp->disc.change_count;
1703 static int sas_get_phy_attached_dev(struct domain_device *dev, int phy_id,
1704 u8 *sas_addr, enum sas_device_type *type)
1707 struct smp_resp *disc_resp;
1708 struct discover_resp *dr;
1710 disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE);
1713 dr = &disc_resp->disc;
1715 res = sas_get_phy_discover(dev, phy_id, disc_resp);
1717 memcpy(sas_addr, disc_resp->disc.attached_sas_addr,
1719 *type = to_dev_type(dr);
1721 memset(sas_addr, 0, SAS_ADDR_SIZE);
1727 static int sas_find_bcast_phy(struct domain_device *dev, int *phy_id,
1728 int from_phy, bool update)
1730 struct expander_device *ex = &dev->ex_dev;
1734 for (i = from_phy; i < ex->num_phys; i++) {
1735 int phy_change_count = 0;
1737 res = sas_get_phy_change_count(dev, i, &phy_change_count);
1739 case SMP_RESP_PHY_VACANT:
1740 case SMP_RESP_NO_PHY:
1742 case SMP_RESP_FUNC_ACC:
1748 if (phy_change_count != ex->ex_phy[i].phy_change_count) {
1750 ex->ex_phy[i].phy_change_count =
1759 static int sas_get_ex_change_count(struct domain_device *dev, int *ecc)
1763 struct smp_resp *rg_resp;
1765 rg_req = alloc_smp_req(RG_REQ_SIZE);
1769 rg_resp = alloc_smp_resp(RG_RESP_SIZE);
1775 rg_req[1] = SMP_REPORT_GENERAL;
1777 res = smp_execute_task(dev, rg_req, RG_REQ_SIZE, rg_resp,
1781 if (rg_resp->result != SMP_RESP_FUNC_ACC) {
1782 res = rg_resp->result;
1786 *ecc = be16_to_cpu(rg_resp->rg.change_count);
1793 * sas_find_bcast_dev - find the device issue BROADCAST(CHANGE).
1794 * @dev:domain device to be detect.
1795 * @src_dev: the device which originated BROADCAST(CHANGE).
1797 * Add self-configuration expander support. Suppose two expander cascading,
1798 * when the first level expander is self-configuring, hotplug the disks in
1799 * second level expander, BROADCAST(CHANGE) will not only be originated
1800 * in the second level expander, but also be originated in the first level
1801 * expander (see SAS protocol SAS 2r-14, 7.11 for detail), it is to say,
1802 * expander changed count in two level expanders will all increment at least
1803 * once, but the phy which chang count has changed is the source device which
1807 static int sas_find_bcast_dev(struct domain_device *dev,
1808 struct domain_device **src_dev)
1810 struct expander_device *ex = &dev->ex_dev;
1811 int ex_change_count = -1;
1814 struct domain_device *ch;
1816 res = sas_get_ex_change_count(dev, &ex_change_count);
1819 if (ex_change_count != -1 && ex_change_count != ex->ex_change_count) {
1820 /* Just detect if this expander phys phy change count changed,
1821 * in order to determine if this expander originate BROADCAST,
1822 * and do not update phy change count field in our structure.
1824 res = sas_find_bcast_phy(dev, &phy_id, 0, false);
1827 ex->ex_change_count = ex_change_count;
1828 pr_info("ex %016llx phy%02d change count has changed\n",
1829 SAS_ADDR(dev->sas_addr), phy_id);
1832 pr_info("ex %016llx phys DID NOT change\n",
1833 SAS_ADDR(dev->sas_addr));
1835 list_for_each_entry(ch, &ex->children, siblings) {
1836 if (dev_is_expander(ch->dev_type)) {
1837 res = sas_find_bcast_dev(ch, src_dev);
1846 static void sas_unregister_ex_tree(struct asd_sas_port *port, struct domain_device *dev)
1848 struct expander_device *ex = &dev->ex_dev;
1849 struct domain_device *child, *n;
1851 list_for_each_entry_safe(child, n, &ex->children, siblings) {
1852 set_bit(SAS_DEV_GONE, &child->state);
1853 if (dev_is_expander(child->dev_type))
1854 sas_unregister_ex_tree(port, child);
1856 sas_unregister_dev(port, child);
1858 sas_unregister_dev(port, dev);
1861 static void sas_unregister_devs_sas_addr(struct domain_device *parent,
1862 int phy_id, bool last)
1864 struct expander_device *ex_dev = &parent->ex_dev;
1865 struct ex_phy *phy = &ex_dev->ex_phy[phy_id];
1866 struct domain_device *child, *n, *found = NULL;
1868 list_for_each_entry_safe(child, n,
1869 &ex_dev->children, siblings) {
1870 if (SAS_ADDR(child->sas_addr) ==
1871 SAS_ADDR(phy->attached_sas_addr)) {
1872 set_bit(SAS_DEV_GONE, &child->state);
1873 if (dev_is_expander(child->dev_type))
1874 sas_unregister_ex_tree(parent->port, child);
1876 sas_unregister_dev(parent->port, child);
1881 sas_disable_routing(parent, phy->attached_sas_addr);
1883 memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
1885 sas_port_delete_phy(phy->port, phy->phy);
1886 sas_device_set_phy(found, phy->port);
1887 if (phy->port->num_phys == 0)
1888 list_add_tail(&phy->port->del_list,
1889 &parent->port->sas_port_del_list);
1894 static int sas_discover_bfs_by_root_level(struct domain_device *root,
1897 struct expander_device *ex_root = &root->ex_dev;
1898 struct domain_device *child;
1901 list_for_each_entry(child, &ex_root->children, siblings) {
1902 if (dev_is_expander(child->dev_type)) {
1903 struct sas_expander_device *ex =
1904 rphy_to_expander_device(child->rphy);
1906 if (level > ex->level)
1907 res = sas_discover_bfs_by_root_level(child,
1909 else if (level == ex->level)
1910 res = sas_ex_discover_devices(child, -1);
1916 static int sas_discover_bfs_by_root(struct domain_device *dev)
1919 struct sas_expander_device *ex = rphy_to_expander_device(dev->rphy);
1920 int level = ex->level+1;
1922 res = sas_ex_discover_devices(dev, -1);
1926 res = sas_discover_bfs_by_root_level(dev, level);
1929 } while (level <= dev->port->disc.max_level);
1934 static int sas_discover_new(struct domain_device *dev, int phy_id)
1936 struct ex_phy *ex_phy = &dev->ex_dev.ex_phy[phy_id];
1937 struct domain_device *child;
1940 pr_debug("ex %016llx phy%02d new device attached\n",
1941 SAS_ADDR(dev->sas_addr), phy_id);
1942 res = sas_ex_phy_discover(dev, phy_id);
1946 if (sas_ex_join_wide_port(dev, phy_id))
1949 res = sas_ex_discover_devices(dev, phy_id);
1952 list_for_each_entry(child, &dev->ex_dev.children, siblings) {
1953 if (SAS_ADDR(child->sas_addr) ==
1954 SAS_ADDR(ex_phy->attached_sas_addr)) {
1955 if (dev_is_expander(child->dev_type))
1956 res = sas_discover_bfs_by_root(child);
1963 static bool dev_type_flutter(enum sas_device_type new, enum sas_device_type old)
1968 /* treat device directed resets as flutter, if we went
1969 * SAS_END_DEVICE to SAS_SATA_PENDING the link needs recovery
1971 if ((old == SAS_SATA_PENDING && new == SAS_END_DEVICE) ||
1972 (old == SAS_END_DEVICE && new == SAS_SATA_PENDING))
1978 static int sas_rediscover_dev(struct domain_device *dev, int phy_id,
1979 bool last, int sibling)
1981 struct expander_device *ex = &dev->ex_dev;
1982 struct ex_phy *phy = &ex->ex_phy[phy_id];
1983 enum sas_device_type type = SAS_PHY_UNUSED;
1984 u8 sas_addr[SAS_ADDR_SIZE];
1989 sprintf(msg, ", part of a wide port with phy%02d", sibling);
1991 pr_debug("ex %016llx rediscovering phy%02d%s\n",
1992 SAS_ADDR(dev->sas_addr), phy_id, msg);
1994 memset(sas_addr, 0, SAS_ADDR_SIZE);
1995 res = sas_get_phy_attached_dev(dev, phy_id, sas_addr, &type);
1997 case SMP_RESP_NO_PHY:
1998 phy->phy_state = PHY_NOT_PRESENT;
1999 sas_unregister_devs_sas_addr(dev, phy_id, last);
2001 case SMP_RESP_PHY_VACANT:
2002 phy->phy_state = PHY_VACANT;
2003 sas_unregister_devs_sas_addr(dev, phy_id, last);
2005 case SMP_RESP_FUNC_ACC:
2013 if ((SAS_ADDR(sas_addr) == 0) || (res == -ECOMM)) {
2014 phy->phy_state = PHY_EMPTY;
2015 sas_unregister_devs_sas_addr(dev, phy_id, last);
2017 * Even though the PHY is empty, for convenience we discover
2018 * the PHY to update the PHY info, like negotiated linkrate.
2020 sas_ex_phy_discover(dev, phy_id);
2022 } else if (SAS_ADDR(sas_addr) == SAS_ADDR(phy->attached_sas_addr) &&
2023 dev_type_flutter(type, phy->attached_dev_type)) {
2024 struct domain_device *ata_dev = sas_ex_to_ata(dev, phy_id);
2027 sas_ex_phy_discover(dev, phy_id);
2029 if (ata_dev && phy->attached_dev_type == SAS_SATA_PENDING)
2030 action = ", needs recovery";
2031 pr_debug("ex %016llx phy%02d broadcast flutter%s\n",
2032 SAS_ADDR(dev->sas_addr), phy_id, action);
2036 /* we always have to delete the old device when we went here */
2037 pr_info("ex %016llx phy%02d replace %016llx\n",
2038 SAS_ADDR(dev->sas_addr), phy_id,
2039 SAS_ADDR(phy->attached_sas_addr));
2040 sas_unregister_devs_sas_addr(dev, phy_id, last);
2042 return sas_discover_new(dev, phy_id);
2046 * sas_rediscover - revalidate the domain.
2047 * @dev:domain device to be detect.
2048 * @phy_id: the phy id will be detected.
2050 * NOTE: this process _must_ quit (return) as soon as any connection
2051 * errors are encountered. Connection recovery is done elsewhere.
2052 * Discover process only interrogates devices in order to discover the
2053 * domain.For plugging out, we un-register the device only when it is
2054 * the last phy in the port, for other phys in this port, we just delete it
2055 * from the port.For inserting, we do discovery when it is the
2056 * first phy,for other phys in this port, we add it to the port to
2057 * forming the wide-port.
2059 static int sas_rediscover(struct domain_device *dev, const int phy_id)
2061 struct expander_device *ex = &dev->ex_dev;
2062 struct ex_phy *changed_phy = &ex->ex_phy[phy_id];
2065 bool last = true; /* is this the last phy of the port */
2067 pr_debug("ex %016llx phy%02d originated BROADCAST(CHANGE)\n",
2068 SAS_ADDR(dev->sas_addr), phy_id);
2070 if (SAS_ADDR(changed_phy->attached_sas_addr) != 0) {
2071 for (i = 0; i < ex->num_phys; i++) {
2072 struct ex_phy *phy = &ex->ex_phy[i];
2076 if (SAS_ADDR(phy->attached_sas_addr) ==
2077 SAS_ADDR(changed_phy->attached_sas_addr)) {
2082 res = sas_rediscover_dev(dev, phy_id, last, i);
2084 res = sas_discover_new(dev, phy_id);
2089 * sas_ex_revalidate_domain - revalidate the domain
2090 * @port_dev: port domain device.
2092 * NOTE: this process _must_ quit (return) as soon as any connection
2093 * errors are encountered. Connection recovery is done elsewhere.
2094 * Discover process only interrogates devices in order to discover the
2097 int sas_ex_revalidate_domain(struct domain_device *port_dev)
2100 struct domain_device *dev = NULL;
2102 res = sas_find_bcast_dev(port_dev, &dev);
2103 if (res == 0 && dev) {
2104 struct expander_device *ex = &dev->ex_dev;
2109 res = sas_find_bcast_phy(dev, &phy_id, i, true);
2112 res = sas_rediscover(dev, phy_id);
2114 } while (i < ex->num_phys);
2119 void sas_smp_handler(struct bsg_job *job, struct Scsi_Host *shost,
2120 struct sas_rphy *rphy)
2122 struct domain_device *dev;
2123 unsigned int rcvlen = 0;
2126 /* no rphy means no smp target support (ie aic94xx host) */
2128 return sas_smp_host_handler(job, shost);
2130 switch (rphy->identify.device_type) {
2131 case SAS_EDGE_EXPANDER_DEVICE:
2132 case SAS_FANOUT_EXPANDER_DEVICE:
2135 pr_err("%s: can we send a smp request to a device?\n",
2140 dev = sas_find_dev_by_rphy(rphy);
2142 pr_err("%s: fail to find a domain_device?\n", __func__);
2146 /* do we need to support multiple segments? */
2147 if (job->request_payload.sg_cnt > 1 ||
2148 job->reply_payload.sg_cnt > 1) {
2149 pr_info("%s: multiple segments req %u, rsp %u\n",
2150 __func__, job->request_payload.payload_len,
2151 job->reply_payload.payload_len);
2155 ret = smp_execute_task_sg(dev, job->request_payload.sg_list,
2156 job->reply_payload.sg_list);
2158 /* bsg_job_done() requires the length received */
2159 rcvlen = job->reply_payload.payload_len - ret;
2164 bsg_job_done(job, ret, rcvlen);