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1/*
2 * Serial Attached SCSI (SAS) Port class
3 *
4 * Copyright (C) 2005 Adaptec, Inc. All rights reserved.
5 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
6 *
7 * This file is licensed under GPLv2.
8 *
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.
13 *
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.
18 *
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
22 *
23 */
24
25#include "sas_internal.h"
26
27#include <scsi/scsi_transport.h>
28#include <scsi/scsi_transport_sas.h>
29#include "../scsi_sas_internal.h"
30
31static bool phy_is_wideport_member(struct asd_sas_port *port, struct asd_sas_phy *phy)
32{
33 struct sas_ha_struct *sas_ha = phy->ha;
34
35 if (memcmp(port->attached_sas_addr, phy->attached_sas_addr,
36 SAS_ADDR_SIZE) != 0 || (sas_ha->strict_wide_ports &&
37 memcmp(port->sas_addr, phy->sas_addr, SAS_ADDR_SIZE) != 0))
38 return false;
39 return true;
40}
41
42/**
43 * sas_form_port -- add this phy to a port
44 * @phy: the phy of interest
45 *
46 * This function adds this phy to an existing port, thus creating a wide
47 * port, or it creates a port and adds the phy to the port.
48 */
49static void sas_form_port(struct asd_sas_phy *phy)
50{
51 int i;
52 struct sas_ha_struct *sas_ha = phy->ha;
53 struct asd_sas_port *port = phy->port;
54 struct sas_internal *si =
55 to_sas_internal(sas_ha->core.shost->transportt);
56 unsigned long flags;
57
58 if (port) {
59 if (!phy_is_wideport_member(port, phy))
60 sas_deform_port(phy, 0);
61 else {
62 SAS_DPRINTK("%s: phy%d belongs to port%d already(%d)!\n",
63 __func__, phy->id, phy->port->id,
64 phy->port->num_phys);
65 return;
66 }
67 }
68
69 /* see if the phy should be part of a wide port */
70 spin_lock_irqsave(&sas_ha->phy_port_lock, flags);
71 for (i = 0; i < sas_ha->num_phys; i++) {
72 port = sas_ha->sas_port[i];
73 spin_lock(&port->phy_list_lock);
74 if (*(u64 *) port->sas_addr &&
75 phy_is_wideport_member(port, phy) && port->num_phys > 0) {
76 /* wide port */
77 SAS_DPRINTK("phy%d matched wide port%d\n", phy->id,
78 port->id);
79 break;
80 }
81 spin_unlock(&port->phy_list_lock);
82 }
83 /* The phy does not match any existing port, create a new one */
84 if (i == sas_ha->num_phys) {
85 for (i = 0; i < sas_ha->num_phys; i++) {
86 port = sas_ha->sas_port[i];
87 spin_lock(&port->phy_list_lock);
88 if (*(u64 *)port->sas_addr == 0
89 && port->num_phys == 0) {
90 memcpy(port->sas_addr, phy->sas_addr,
91 SAS_ADDR_SIZE);
92 break;
93 }
94 spin_unlock(&port->phy_list_lock);
95 }
96 }
97
98 if (i >= sas_ha->num_phys) {
99 printk(KERN_NOTICE "%s: couldn't find a free port, bug?\n",
100 __func__);
101 spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
102 return;
103 }
104
105 /* add the phy to the port */
106 list_add_tail(&phy->port_phy_el, &port->phy_list);
107 phy->port = port;
108 port->num_phys++;
109 port->phy_mask |= (1U << phy->id);
110
111 if (!port->phy)
112 port->phy = phy->phy;
113
114 if (*(u64 *)port->attached_sas_addr == 0) {
115 port->class = phy->class;
116 memcpy(port->attached_sas_addr, phy->attached_sas_addr,
117 SAS_ADDR_SIZE);
118 port->iproto = phy->iproto;
119 port->tproto = phy->tproto;
120 port->oob_mode = phy->oob_mode;
121 port->linkrate = phy->linkrate;
122 } else
123 port->linkrate = max(port->linkrate, phy->linkrate);
124 spin_unlock(&port->phy_list_lock);
125 spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
126
127 if (!port->port) {
128 port->port = sas_port_alloc(phy->phy->dev.parent, port->id);
129 BUG_ON(!port->port);
130 sas_port_add(port->port);
131 }
132 sas_port_add_phy(port->port, phy->phy);
133
134 SAS_DPRINTK("%s added to %s, phy_mask:0x%x (%16llx)\n",
135 dev_name(&phy->phy->dev), dev_name(&port->port->dev),
136 port->phy_mask,
137 SAS_ADDR(port->attached_sas_addr));
138
139 if (port->port_dev)
140 port->port_dev->pathways = port->num_phys;
141
142 /* Tell the LLDD about this port formation. */
143 if (si->dft->lldd_port_formed)
144 si->dft->lldd_port_formed(phy);
145
146 sas_discover_event(phy->port, DISCE_DISCOVER_DOMAIN);
147}
148
149/**
150 * sas_deform_port -- remove this phy from the port it belongs to
151 * @phy: the phy of interest
152 *
153 * This is called when the physical link to the other phy has been
154 * lost (on this phy), in Event thread context. We cannot delay here.
155 */
156void sas_deform_port(struct asd_sas_phy *phy, int gone)
157{
158 struct sas_ha_struct *sas_ha = phy->ha;
159 struct asd_sas_port *port = phy->port;
160 struct sas_internal *si =
161 to_sas_internal(sas_ha->core.shost->transportt);
162 struct domain_device *dev;
163 unsigned long flags;
164
165 if (!port)
166 return; /* done by a phy event */
167
168 dev = port->port_dev;
169 if (dev)
170 dev->pathways--;
171
172 if (port->num_phys == 1) {
173 if (dev && gone)
174 dev->gone = 1;
175 sas_unregister_domain_devices(port);
176 sas_port_delete(port->port);
177 port->port = NULL;
178 } else
179 sas_port_delete_phy(port->port, phy->phy);
180
181 if (si->dft->lldd_port_deformed)
182 si->dft->lldd_port_deformed(phy);
183
184 spin_lock_irqsave(&sas_ha->phy_port_lock, flags);
185 spin_lock(&port->phy_list_lock);
186
187 list_del_init(&phy->port_phy_el);
188 phy->port = NULL;
189 port->num_phys--;
190 port->phy_mask &= ~(1U << phy->id);
191
192 if (port->num_phys == 0) {
193 INIT_LIST_HEAD(&port->phy_list);
194 memset(port->sas_addr, 0, SAS_ADDR_SIZE);
195 memset(port->attached_sas_addr, 0, SAS_ADDR_SIZE);
196 port->class = 0;
197 port->iproto = 0;
198 port->tproto = 0;
199 port->oob_mode = 0;
200 port->phy_mask = 0;
201 }
202 spin_unlock(&port->phy_list_lock);
203 spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
204
205 return;
206}
207
208/* ---------- SAS port events ---------- */
209
210void sas_porte_bytes_dmaed(struct work_struct *work)
211{
212 struct asd_sas_event *ev =
213 container_of(work, struct asd_sas_event, work);
214 struct asd_sas_phy *phy = ev->phy;
215
216 sas_begin_event(PORTE_BYTES_DMAED, &phy->ha->event_lock,
217 &phy->port_events_pending);
218
219 sas_form_port(phy);
220}
221
222void sas_porte_broadcast_rcvd(struct work_struct *work)
223{
224 struct asd_sas_event *ev =
225 container_of(work, struct asd_sas_event, work);
226 struct asd_sas_phy *phy = ev->phy;
227 unsigned long flags;
228 u32 prim;
229
230 sas_begin_event(PORTE_BROADCAST_RCVD, &phy->ha->event_lock,
231 &phy->port_events_pending);
232
233 spin_lock_irqsave(&phy->sas_prim_lock, flags);
234 prim = phy->sas_prim;
235 spin_unlock_irqrestore(&phy->sas_prim_lock, flags);
236
237 SAS_DPRINTK("broadcast received: %d\n", prim);
238 sas_discover_event(phy->port, DISCE_REVALIDATE_DOMAIN);
239}
240
241void sas_porte_link_reset_err(struct work_struct *work)
242{
243 struct asd_sas_event *ev =
244 container_of(work, struct asd_sas_event, work);
245 struct asd_sas_phy *phy = ev->phy;
246
247 sas_begin_event(PORTE_LINK_RESET_ERR, &phy->ha->event_lock,
248 &phy->port_events_pending);
249
250 sas_deform_port(phy, 1);
251}
252
253void sas_porte_timer_event(struct work_struct *work)
254{
255 struct asd_sas_event *ev =
256 container_of(work, struct asd_sas_event, work);
257 struct asd_sas_phy *phy = ev->phy;
258
259 sas_begin_event(PORTE_TIMER_EVENT, &phy->ha->event_lock,
260 &phy->port_events_pending);
261
262 sas_deform_port(phy, 1);
263}
264
265void sas_porte_hard_reset(struct work_struct *work)
266{
267 struct asd_sas_event *ev =
268 container_of(work, struct asd_sas_event, work);
269 struct asd_sas_phy *phy = ev->phy;
270
271 sas_begin_event(PORTE_HARD_RESET, &phy->ha->event_lock,
272 &phy->port_events_pending);
273
274 sas_deform_port(phy, 1);
275}
276
277/* ---------- SAS port registration ---------- */
278
279static void sas_init_port(struct asd_sas_port *port,
280 struct sas_ha_struct *sas_ha, int i)
281{
282 memset(port, 0, sizeof(*port));
283 port->id = i;
284 INIT_LIST_HEAD(&port->dev_list);
285 spin_lock_init(&port->phy_list_lock);
286 INIT_LIST_HEAD(&port->phy_list);
287 port->ha = sas_ha;
288
289 spin_lock_init(&port->dev_list_lock);
290}
291
292int sas_register_ports(struct sas_ha_struct *sas_ha)
293{
294 int i;
295
296 /* initialize the ports and discovery */
297 for (i = 0; i < sas_ha->num_phys; i++) {
298 struct asd_sas_port *port = sas_ha->sas_port[i];
299
300 sas_init_port(port, sas_ha, i);
301 sas_init_disc(&port->disc, port);
302 }
303 return 0;
304}
305
306void sas_unregister_ports(struct sas_ha_struct *sas_ha)
307{
308 int i;
309
310 for (i = 0; i < sas_ha->num_phys; i++)
311 if (sas_ha->sas_phy[i]->port)
312 sas_deform_port(sas_ha->sas_phy[i], 0);
313
314}
1/*
2 * Serial Attached SCSI (SAS) Port class
3 *
4 * Copyright (C) 2005 Adaptec, Inc. All rights reserved.
5 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
6 *
7 * This file is licensed under GPLv2.
8 *
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.
13 *
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.
18 *
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
22 *
23 */
24
25#include "sas_internal.h"
26
27#include <scsi/scsi_transport.h>
28#include <scsi/scsi_transport_sas.h>
29#include "../scsi_sas_internal.h"
30
31static bool phy_is_wideport_member(struct asd_sas_port *port, struct asd_sas_phy *phy)
32{
33 struct sas_ha_struct *sas_ha = phy->ha;
34
35 if (memcmp(port->attached_sas_addr, phy->attached_sas_addr,
36 SAS_ADDR_SIZE) != 0 || (sas_ha->strict_wide_ports &&
37 memcmp(port->sas_addr, phy->sas_addr, SAS_ADDR_SIZE) != 0))
38 return false;
39 return true;
40}
41
42static void sas_resume_port(struct asd_sas_phy *phy)
43{
44 struct domain_device *dev;
45 struct asd_sas_port *port = phy->port;
46 struct sas_ha_struct *sas_ha = phy->ha;
47 struct sas_internal *si = to_sas_internal(sas_ha->core.shost->transportt);
48
49 if (si->dft->lldd_port_formed)
50 si->dft->lldd_port_formed(phy);
51
52 if (port->suspended)
53 port->suspended = 0;
54 else {
55 /* we only need to handle "link returned" actions once */
56 return;
57 }
58
59 /* if the port came back:
60 * 1/ presume every device came back
61 * 2/ force the next revalidation to check all expander phys
62 */
63 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
64 int i, rc;
65
66 rc = sas_notify_lldd_dev_found(dev);
67 if (rc) {
68 sas_unregister_dev(port, dev);
69 continue;
70 }
71
72 if (dev->dev_type == SAS_EDGE_EXPANDER_DEVICE || dev->dev_type == SAS_FANOUT_EXPANDER_DEVICE) {
73 dev->ex_dev.ex_change_count = -1;
74 for (i = 0; i < dev->ex_dev.num_phys; i++) {
75 struct ex_phy *phy = &dev->ex_dev.ex_phy[i];
76
77 phy->phy_change_count = -1;
78 }
79 }
80 }
81
82 sas_discover_event(port, DISCE_RESUME);
83}
84
85/**
86 * sas_form_port -- add this phy to a port
87 * @phy: the phy of interest
88 *
89 * This function adds this phy to an existing port, thus creating a wide
90 * port, or it creates a port and adds the phy to the port.
91 */
92static void sas_form_port(struct asd_sas_phy *phy)
93{
94 int i;
95 struct sas_ha_struct *sas_ha = phy->ha;
96 struct asd_sas_port *port = phy->port;
97 struct sas_internal *si =
98 to_sas_internal(sas_ha->core.shost->transportt);
99 unsigned long flags;
100
101 if (port) {
102 if (!phy_is_wideport_member(port, phy))
103 sas_deform_port(phy, 0);
104 else if (phy->suspended) {
105 phy->suspended = 0;
106 sas_resume_port(phy);
107
108 /* phy came back, try to cancel the timeout */
109 wake_up(&sas_ha->eh_wait_q);
110 return;
111 } else {
112 SAS_DPRINTK("%s: phy%d belongs to port%d already(%d)!\n",
113 __func__, phy->id, phy->port->id,
114 phy->port->num_phys);
115 return;
116 }
117 }
118
119 /* see if the phy should be part of a wide port */
120 spin_lock_irqsave(&sas_ha->phy_port_lock, flags);
121 for (i = 0; i < sas_ha->num_phys; i++) {
122 port = sas_ha->sas_port[i];
123 spin_lock(&port->phy_list_lock);
124 if (*(u64 *) port->sas_addr &&
125 phy_is_wideport_member(port, phy) && port->num_phys > 0) {
126 /* wide port */
127 SAS_DPRINTK("phy%d matched wide port%d\n", phy->id,
128 port->id);
129 break;
130 }
131 spin_unlock(&port->phy_list_lock);
132 }
133 /* The phy does not match any existing port, create a new one */
134 if (i == sas_ha->num_phys) {
135 for (i = 0; i < sas_ha->num_phys; i++) {
136 port = sas_ha->sas_port[i];
137 spin_lock(&port->phy_list_lock);
138 if (*(u64 *)port->sas_addr == 0
139 && port->num_phys == 0) {
140 memcpy(port->sas_addr, phy->sas_addr,
141 SAS_ADDR_SIZE);
142 break;
143 }
144 spin_unlock(&port->phy_list_lock);
145 }
146 }
147
148 if (i >= sas_ha->num_phys) {
149 printk(KERN_NOTICE "%s: couldn't find a free port, bug?\n",
150 __func__);
151 spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
152 return;
153 }
154
155 /* add the phy to the port */
156 list_add_tail(&phy->port_phy_el, &port->phy_list);
157 sas_phy_set_target(phy, port->port_dev);
158 phy->port = port;
159 port->num_phys++;
160 port->phy_mask |= (1U << phy->id);
161
162 if (*(u64 *)port->attached_sas_addr == 0) {
163 port->class = phy->class;
164 memcpy(port->attached_sas_addr, phy->attached_sas_addr,
165 SAS_ADDR_SIZE);
166 port->iproto = phy->iproto;
167 port->tproto = phy->tproto;
168 port->oob_mode = phy->oob_mode;
169 port->linkrate = phy->linkrate;
170 } else
171 port->linkrate = max(port->linkrate, phy->linkrate);
172 spin_unlock(&port->phy_list_lock);
173 spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
174
175 if (!port->port) {
176 port->port = sas_port_alloc(phy->phy->dev.parent, port->id);
177 BUG_ON(!port->port);
178 sas_port_add(port->port);
179 }
180 sas_port_add_phy(port->port, phy->phy);
181
182 SAS_DPRINTK("%s added to %s, phy_mask:0x%x (%16llx)\n",
183 dev_name(&phy->phy->dev), dev_name(&port->port->dev),
184 port->phy_mask,
185 SAS_ADDR(port->attached_sas_addr));
186
187 if (port->port_dev)
188 port->port_dev->pathways = port->num_phys;
189
190 /* Tell the LLDD about this port formation. */
191 if (si->dft->lldd_port_formed)
192 si->dft->lldd_port_formed(phy);
193
194 sas_discover_event(phy->port, DISCE_DISCOVER_DOMAIN);
195}
196
197/**
198 * sas_deform_port -- remove this phy from the port it belongs to
199 * @phy: the phy of interest
200 *
201 * This is called when the physical link to the other phy has been
202 * lost (on this phy), in Event thread context. We cannot delay here.
203 */
204void sas_deform_port(struct asd_sas_phy *phy, int gone)
205{
206 struct sas_ha_struct *sas_ha = phy->ha;
207 struct asd_sas_port *port = phy->port;
208 struct sas_internal *si =
209 to_sas_internal(sas_ha->core.shost->transportt);
210 struct domain_device *dev;
211 unsigned long flags;
212
213 if (!port)
214 return; /* done by a phy event */
215
216 dev = port->port_dev;
217 if (dev)
218 dev->pathways--;
219
220 if (port->num_phys == 1) {
221 sas_unregister_domain_devices(port, gone);
222 sas_port_delete(port->port);
223 port->port = NULL;
224 } else {
225 sas_port_delete_phy(port->port, phy->phy);
226 sas_device_set_phy(dev, port->port);
227 }
228
229 if (si->dft->lldd_port_deformed)
230 si->dft->lldd_port_deformed(phy);
231
232 spin_lock_irqsave(&sas_ha->phy_port_lock, flags);
233 spin_lock(&port->phy_list_lock);
234
235 list_del_init(&phy->port_phy_el);
236 sas_phy_set_target(phy, NULL);
237 phy->port = NULL;
238 port->num_phys--;
239 port->phy_mask &= ~(1U << phy->id);
240
241 if (port->num_phys == 0) {
242 INIT_LIST_HEAD(&port->phy_list);
243 memset(port->sas_addr, 0, SAS_ADDR_SIZE);
244 memset(port->attached_sas_addr, 0, SAS_ADDR_SIZE);
245 port->class = 0;
246 port->iproto = 0;
247 port->tproto = 0;
248 port->oob_mode = 0;
249 port->phy_mask = 0;
250 }
251 spin_unlock(&port->phy_list_lock);
252 spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
253
254 return;
255}
256
257/* ---------- SAS port events ---------- */
258
259void sas_porte_bytes_dmaed(struct work_struct *work)
260{
261 struct asd_sas_event *ev = to_asd_sas_event(work);
262 struct asd_sas_phy *phy = ev->phy;
263
264 clear_bit(PORTE_BYTES_DMAED, &phy->port_events_pending);
265
266 sas_form_port(phy);
267}
268
269void sas_porte_broadcast_rcvd(struct work_struct *work)
270{
271 struct asd_sas_event *ev = to_asd_sas_event(work);
272 struct asd_sas_phy *phy = ev->phy;
273 unsigned long flags;
274 u32 prim;
275
276 clear_bit(PORTE_BROADCAST_RCVD, &phy->port_events_pending);
277
278 spin_lock_irqsave(&phy->sas_prim_lock, flags);
279 prim = phy->sas_prim;
280 spin_unlock_irqrestore(&phy->sas_prim_lock, flags);
281
282 SAS_DPRINTK("broadcast received: %d\n", prim);
283 sas_discover_event(phy->port, DISCE_REVALIDATE_DOMAIN);
284}
285
286void sas_porte_link_reset_err(struct work_struct *work)
287{
288 struct asd_sas_event *ev = to_asd_sas_event(work);
289 struct asd_sas_phy *phy = ev->phy;
290
291 clear_bit(PORTE_LINK_RESET_ERR, &phy->port_events_pending);
292
293 sas_deform_port(phy, 1);
294}
295
296void sas_porte_timer_event(struct work_struct *work)
297{
298 struct asd_sas_event *ev = to_asd_sas_event(work);
299 struct asd_sas_phy *phy = ev->phy;
300
301 clear_bit(PORTE_TIMER_EVENT, &phy->port_events_pending);
302
303 sas_deform_port(phy, 1);
304}
305
306void sas_porte_hard_reset(struct work_struct *work)
307{
308 struct asd_sas_event *ev = to_asd_sas_event(work);
309 struct asd_sas_phy *phy = ev->phy;
310
311 clear_bit(PORTE_HARD_RESET, &phy->port_events_pending);
312
313 sas_deform_port(phy, 1);
314}
315
316/* ---------- SAS port registration ---------- */
317
318static void sas_init_port(struct asd_sas_port *port,
319 struct sas_ha_struct *sas_ha, int i)
320{
321 memset(port, 0, sizeof(*port));
322 port->id = i;
323 INIT_LIST_HEAD(&port->dev_list);
324 INIT_LIST_HEAD(&port->disco_list);
325 INIT_LIST_HEAD(&port->destroy_list);
326 spin_lock_init(&port->phy_list_lock);
327 INIT_LIST_HEAD(&port->phy_list);
328 port->ha = sas_ha;
329
330 spin_lock_init(&port->dev_list_lock);
331}
332
333int sas_register_ports(struct sas_ha_struct *sas_ha)
334{
335 int i;
336
337 /* initialize the ports and discovery */
338 for (i = 0; i < sas_ha->num_phys; i++) {
339 struct asd_sas_port *port = sas_ha->sas_port[i];
340
341 sas_init_port(port, sas_ha, i);
342 sas_init_disc(&port->disc, port);
343 }
344 return 0;
345}
346
347void sas_unregister_ports(struct sas_ha_struct *sas_ha)
348{
349 int i;
350
351 for (i = 0; i < sas_ha->num_phys; i++)
352 if (sas_ha->sas_phy[i]->port)
353 sas_deform_port(sas_ha->sas_phy[i], 0);
354
355}