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))
43 * sas_form_port -- add this phy to a port
44 * @phy: the phy of interest
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.
49 static void sas_form_port(struct asd_sas_phy *phy)
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);
59 if (!phy_is_wideport_member(port, phy))
62 SAS_DPRINTK("%s: phy%d belongs to port%d already(%d)!\n",
63 __func__, phy->id, phy->port->id,
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) {
77 SAS_DPRINTK("phy%d matched wide port%d\n", phy->id,
81 spin_unlock(&port->phy_list_lock);
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,
94 spin_unlock(&port->phy_list_lock);
98 if (i >= sas_ha->num_phys) {
99 printk(KERN_NOTICE "%s: couldn't find a free port, bug?\n",
101 spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
105 /* add the phy to the port */
106 list_add_tail(&phy->port_phy_el, &port->phy_list);
109 port->phy_mask |= (1U << phy->id);
112 port->phy = phy->phy;
114 if (*(u64 *)port->attached_sas_addr == 0) {
115 port->class = phy->class;
116 memcpy(port->attached_sas_addr, phy->attached_sas_addr,
118 port->iproto = phy->iproto;
119 port->tproto = phy->tproto;
120 port->oob_mode = phy->oob_mode;
121 port->linkrate = phy->linkrate;
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);
128 port->port = sas_port_alloc(phy->phy->dev.parent, port->id);
130 sas_port_add(port->port);
132 sas_port_add_phy(port->port, phy->phy);
134 SAS_DPRINTK("%s added to %s, phy_mask:0x%x (%16llx)\n",
135 dev_name(&phy->phy->dev), dev_name(&port->port->dev),
137 SAS_ADDR(port->attached_sas_addr));
140 port->port_dev->pathways = port->num_phys;
142 /* Tell the LLDD about this port formation. */
143 if (si->dft->lldd_port_formed)
144 si->dft->lldd_port_formed(phy);
146 sas_discover_event(phy->port, DISCE_DISCOVER_DOMAIN);
150 * sas_deform_port -- remove this phy from the port it belongs to
151 * @phy: the phy of interest
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.
156 void sas_deform_port(struct asd_sas_phy *phy)
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);
165 return; /* done by a phy event */
168 port->port_dev->pathways--;
170 if (port->num_phys == 1) {
171 sas_unregister_domain_devices(port);
172 sas_port_delete(port->port);
175 sas_port_delete_phy(port->port, phy->phy);
178 if (si->dft->lldd_port_deformed)
179 si->dft->lldd_port_deformed(phy);
181 spin_lock_irqsave(&sas_ha->phy_port_lock, flags);
182 spin_lock(&port->phy_list_lock);
184 list_del_init(&phy->port_phy_el);
187 port->phy_mask &= ~(1U << phy->id);
189 if (port->num_phys == 0) {
190 INIT_LIST_HEAD(&port->phy_list);
191 memset(port->sas_addr, 0, SAS_ADDR_SIZE);
192 memset(port->attached_sas_addr, 0, SAS_ADDR_SIZE);
199 spin_unlock(&port->phy_list_lock);
200 spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags);
205 /* ---------- SAS port events ---------- */
207 void sas_porte_bytes_dmaed(struct work_struct *work)
209 struct asd_sas_event *ev =
210 container_of(work, struct asd_sas_event, work);
211 struct asd_sas_phy *phy = ev->phy;
213 sas_begin_event(PORTE_BYTES_DMAED, &phy->ha->event_lock,
214 &phy->port_events_pending);
219 void sas_porte_broadcast_rcvd(struct work_struct *work)
221 struct asd_sas_event *ev =
222 container_of(work, struct asd_sas_event, work);
223 struct asd_sas_phy *phy = ev->phy;
227 sas_begin_event(PORTE_BROADCAST_RCVD, &phy->ha->event_lock,
228 &phy->port_events_pending);
230 spin_lock_irqsave(&phy->sas_prim_lock, flags);
231 prim = phy->sas_prim;
232 spin_unlock_irqrestore(&phy->sas_prim_lock, flags);
234 SAS_DPRINTK("broadcast received: %d\n", prim);
235 sas_discover_event(phy->port, DISCE_REVALIDATE_DOMAIN);
238 void sas_porte_link_reset_err(struct work_struct *work)
240 struct asd_sas_event *ev =
241 container_of(work, struct asd_sas_event, work);
242 struct asd_sas_phy *phy = ev->phy;
244 sas_begin_event(PORTE_LINK_RESET_ERR, &phy->ha->event_lock,
245 &phy->port_events_pending);
247 sas_deform_port(phy);
250 void sas_porte_timer_event(struct work_struct *work)
252 struct asd_sas_event *ev =
253 container_of(work, struct asd_sas_event, work);
254 struct asd_sas_phy *phy = ev->phy;
256 sas_begin_event(PORTE_TIMER_EVENT, &phy->ha->event_lock,
257 &phy->port_events_pending);
259 sas_deform_port(phy);
262 void sas_porte_hard_reset(struct work_struct *work)
264 struct asd_sas_event *ev =
265 container_of(work, struct asd_sas_event, work);
266 struct asd_sas_phy *phy = ev->phy;
268 sas_begin_event(PORTE_HARD_RESET, &phy->ha->event_lock,
269 &phy->port_events_pending);
271 sas_deform_port(phy);
274 /* ---------- SAS port registration ---------- */
276 static void sas_init_port(struct asd_sas_port *port,
277 struct sas_ha_struct *sas_ha, int i)
279 memset(port, 0, sizeof(*port));
281 INIT_LIST_HEAD(&port->dev_list);
282 spin_lock_init(&port->phy_list_lock);
283 INIT_LIST_HEAD(&port->phy_list);
286 spin_lock_init(&port->dev_list_lock);
289 int sas_register_ports(struct sas_ha_struct *sas_ha)
293 /* initialize the ports and discovery */
294 for (i = 0; i < sas_ha->num_phys; i++) {
295 struct asd_sas_port *port = sas_ha->sas_port[i];
297 sas_init_port(port, sas_ha, i);
298 sas_init_disc(&port->disc, port);
303 void sas_unregister_ports(struct sas_ha_struct *sas_ha)
307 for (i = 0; i < sas_ha->num_phys; i++)
308 if (sas_ha->sas_phy[i]->port)
309 sas_deform_port(sas_ha->sas_phy[i]);