2 * Serial Attached SCSI (SAS) Port class
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 "sas_internal.h"
27 #include <scsi/scsi_transport.h>
28 #include <scsi/scsi_transport_sas.h>
29 #include "../scsi_sas_internal.h"
31 static bool phy_is_wideport_member(struct asd_sas_port *port, struct asd_sas_phy *phy)
33 struct sas_ha_struct *sas_ha = phy->ha;
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))
42 static void sas_resume_port(struct asd_sas_phy *phy)
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);
49 if (si->dft->lldd_port_formed)
50 si->dft->lldd_port_formed(phy);
55 /* we only need to handle "link returned" actions once */
59 /* if the port came back:
60 * 1/ presume every device came back
61 * 2/ force the next revalidation to check all expander phys
63 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
66 rc = sas_notify_lldd_dev_found(dev);
68 sas_unregister_dev(port, dev);
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];
77 phy->phy_change_count = -1;
82 sas_discover_event(port, DISCE_RESUME);
86 * sas_form_port -- add this phy to a port
87 * @phy: the phy of interest
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.
92 static void sas_form_port(struct asd_sas_phy *phy)
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);
102 if (!phy_is_wideport_member(port, phy))
103 sas_deform_port(phy, 0);
104 else if (phy->suspended) {
106 sas_resume_port(phy);
108 /* phy came back, try to cancel the timeout */
109 wake_up(&sas_ha->eh_wait_q);
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);
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) {
127 SAS_DPRINTK("phy%d matched wide port%d\n", phy->id,
131 spin_unlock(&port->phy_list_lock);
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,
144 spin_unlock(&port->phy_list_lock);
148 if (i >= sas_ha->num_phys) {
149 printk(KERN_NOTICE "%s: couldn't find a free port, bug?\n",
151 spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
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);
160 port->phy_mask |= (1U << phy->id);
162 if (*(u64 *)port->attached_sas_addr == 0) {
163 port->class = phy->class;
164 memcpy(port->attached_sas_addr, phy->attached_sas_addr,
166 port->iproto = phy->iproto;
167 port->tproto = phy->tproto;
168 port->oob_mode = phy->oob_mode;
169 port->linkrate = phy->linkrate;
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);
176 port->port = sas_port_alloc(phy->phy->dev.parent, port->id);
178 sas_port_add(port->port);
180 sas_port_add_phy(port->port, phy->phy);
182 SAS_DPRINTK("%s added to %s, phy_mask:0x%x (%16llx)\n",
183 dev_name(&phy->phy->dev), dev_name(&port->port->dev),
185 SAS_ADDR(port->attached_sas_addr));
188 port->port_dev->pathways = port->num_phys;
190 /* Tell the LLDD about this port formation. */
191 if (si->dft->lldd_port_formed)
192 si->dft->lldd_port_formed(phy);
194 sas_discover_event(phy->port, DISCE_DISCOVER_DOMAIN);
195 flush_workqueue(sas_ha->disco_q);
199 * sas_deform_port -- remove this phy from the port it belongs to
200 * @phy: the phy of interest
202 * This is called when the physical link to the other phy has been
203 * lost (on this phy), in Event thread context. We cannot delay here.
205 void sas_deform_port(struct asd_sas_phy *phy, int gone)
207 struct sas_ha_struct *sas_ha = phy->ha;
208 struct asd_sas_port *port = phy->port;
209 struct sas_internal *si =
210 to_sas_internal(sas_ha->core.shost->transportt);
211 struct domain_device *dev;
215 return; /* done by a phy event */
217 dev = port->port_dev;
221 if (port->num_phys == 1) {
222 sas_unregister_domain_devices(port, gone);
223 sas_port_delete(port->port);
226 sas_port_delete_phy(port->port, phy->phy);
227 sas_device_set_phy(dev, port->port);
230 if (si->dft->lldd_port_deformed)
231 si->dft->lldd_port_deformed(phy);
233 spin_lock_irqsave(&sas_ha->phy_port_lock, flags);
234 spin_lock(&port->phy_list_lock);
236 list_del_init(&phy->port_phy_el);
237 sas_phy_set_target(phy, NULL);
240 port->phy_mask &= ~(1U << phy->id);
242 if (port->num_phys == 0) {
243 INIT_LIST_HEAD(&port->phy_list);
244 memset(port->sas_addr, 0, SAS_ADDR_SIZE);
245 memset(port->attached_sas_addr, 0, SAS_ADDR_SIZE);
252 spin_unlock(&port->phy_list_lock);
253 spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
258 /* ---------- SAS port events ---------- */
260 void sas_porte_bytes_dmaed(struct work_struct *work)
262 struct asd_sas_event *ev = to_asd_sas_event(work);
263 struct asd_sas_phy *phy = ev->phy;
268 void sas_porte_broadcast_rcvd(struct work_struct *work)
270 struct asd_sas_event *ev = to_asd_sas_event(work);
271 struct asd_sas_phy *phy = ev->phy;
275 spin_lock_irqsave(&phy->sas_prim_lock, flags);
276 prim = phy->sas_prim;
277 spin_unlock_irqrestore(&phy->sas_prim_lock, flags);
279 SAS_DPRINTK("broadcast received: %d\n", prim);
280 sas_discover_event(phy->port, DISCE_REVALIDATE_DOMAIN);
283 flush_workqueue(phy->port->ha->disco_q);
286 void sas_porte_link_reset_err(struct work_struct *work)
288 struct asd_sas_event *ev = to_asd_sas_event(work);
289 struct asd_sas_phy *phy = ev->phy;
291 sas_deform_port(phy, 1);
294 void sas_porte_timer_event(struct work_struct *work)
296 struct asd_sas_event *ev = to_asd_sas_event(work);
297 struct asd_sas_phy *phy = ev->phy;
299 sas_deform_port(phy, 1);
302 void sas_porte_hard_reset(struct work_struct *work)
304 struct asd_sas_event *ev = to_asd_sas_event(work);
305 struct asd_sas_phy *phy = ev->phy;
307 sas_deform_port(phy, 1);
310 /* ---------- SAS port registration ---------- */
312 static void sas_init_port(struct asd_sas_port *port,
313 struct sas_ha_struct *sas_ha, int i)
315 memset(port, 0, sizeof(*port));
317 INIT_LIST_HEAD(&port->dev_list);
318 INIT_LIST_HEAD(&port->disco_list);
319 INIT_LIST_HEAD(&port->destroy_list);
320 spin_lock_init(&port->phy_list_lock);
321 INIT_LIST_HEAD(&port->phy_list);
324 spin_lock_init(&port->dev_list_lock);
327 int sas_register_ports(struct sas_ha_struct *sas_ha)
331 /* initialize the ports and discovery */
332 for (i = 0; i < sas_ha->num_phys; i++) {
333 struct asd_sas_port *port = sas_ha->sas_port[i];
335 sas_init_port(port, sas_ha, i);
336 sas_init_disc(&port->disc, port);
341 void sas_unregister_ports(struct sas_ha_struct *sas_ha)
345 for (i = 0; i < sas_ha->num_phys; i++)
346 if (sas_ha->sas_phy[i]->port)
347 sas_deform_port(sas_ha->sas_phy[i], 0);
351 const work_func_t sas_port_event_fns[PORT_NUM_EVENTS] = {
352 [PORTE_BYTES_DMAED] = sas_porte_bytes_dmaed,
353 [PORTE_BROADCAST_RCVD] = sas_porte_broadcast_rcvd,
354 [PORTE_LINK_RESET_ERR] = sas_porte_link_reset_err,
355 [PORTE_TIMER_EVENT] = sas_porte_timer_event,
356 [PORTE_HARD_RESET] = sas_porte_hard_reset,