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2908d778 JB |
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 | ||
00f0254e DW |
31 | static 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 | ||
2908d778 JB |
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 | */ | |
49 | static 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); | |
980fa2f9 | 56 | unsigned long flags; |
2908d778 JB |
57 | |
58 | if (port) { | |
00f0254e | 59 | if (!phy_is_wideport_member(port, phy)) |
90f1e10d | 60 | sas_deform_port(phy, 0); |
2908d778 JB |
61 | else { |
62 | SAS_DPRINTK("%s: phy%d belongs to port%d already(%d)!\n", | |
cadbd4a5 | 63 | __func__, phy->id, phy->port->id, |
2908d778 JB |
64 | phy->port->num_phys); |
65 | return; | |
66 | } | |
67 | } | |
68 | ||
5381837f | 69 | /* see if the phy should be part of a wide port */ |
980fa2f9 | 70 | spin_lock_irqsave(&sas_ha->phy_port_lock, flags); |
2908d778 JB |
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 && | |
00f0254e | 75 | phy_is_wideport_member(port, phy) && port->num_phys > 0) { |
2908d778 JB |
76 | /* wide port */ |
77 | SAS_DPRINTK("phy%d matched wide port%d\n", phy->id, | |
78 | port->id); | |
79 | break; | |
2908d778 JB |
80 | } |
81 | spin_unlock(&port->phy_list_lock); | |
82 | } | |
5381837f TP |
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 | } | |
2908d778 JB |
97 | |
98 | if (i >= sas_ha->num_phys) { | |
99 | printk(KERN_NOTICE "%s: couldn't find a free port, bug?\n", | |
cadbd4a5 | 100 | __func__); |
980fa2f9 | 101 | spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags); |
2908d778 JB |
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 | ||
2908d778 JB |
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); | |
980fa2f9 | 125 | spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags); |
2908d778 JB |
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 | ||
a29c0515 | 134 | SAS_DPRINTK("%s added to %s, phy_mask:0x%x (%16llx)\n", |
71610f55 | 135 | dev_name(&phy->phy->dev), dev_name(&port->port->dev), |
a29c0515 JB |
136 | port->phy_mask, |
137 | SAS_ADDR(port->attached_sas_addr)); | |
138 | ||
2908d778 JB |
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 | */ | |
90f1e10d | 156 | void sas_deform_port(struct asd_sas_phy *phy, int gone) |
2908d778 JB |
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); | |
90f1e10d | 162 | struct domain_device *dev; |
980fa2f9 | 163 | unsigned long flags; |
2908d778 JB |
164 | |
165 | if (!port) | |
166 | return; /* done by a phy event */ | |
167 | ||
90f1e10d DW |
168 | dev = port->port_dev; |
169 | if (dev) | |
170 | dev->pathways--; | |
2908d778 JB |
171 | |
172 | if (port->num_phys == 1) { | |
90f1e10d DW |
173 | if (dev && gone) |
174 | dev->gone = 1; | |
2908d778 JB |
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 | ||
2908d778 JB |
181 | if (si->dft->lldd_port_deformed) |
182 | si->dft->lldd_port_deformed(phy); | |
183 | ||
980fa2f9 | 184 | spin_lock_irqsave(&sas_ha->phy_port_lock, flags); |
2908d778 JB |
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); | |
980fa2f9 | 203 | spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags); |
2908d778 JB |
204 | |
205 | return; | |
206 | } | |
207 | ||
208 | /* ---------- SAS port events ---------- */ | |
209 | ||
c4028958 | 210 | void sas_porte_bytes_dmaed(struct work_struct *work) |
2908d778 | 211 | { |
c4028958 DH |
212 | struct asd_sas_event *ev = |
213 | container_of(work, struct asd_sas_event, work); | |
214 | struct asd_sas_phy *phy = ev->phy; | |
2908d778 JB |
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 | ||
c4028958 | 222 | void sas_porte_broadcast_rcvd(struct work_struct *work) |
2908d778 | 223 | { |
c4028958 DH |
224 | struct asd_sas_event *ev = |
225 | container_of(work, struct asd_sas_event, work); | |
226 | struct asd_sas_phy *phy = ev->phy; | |
2908d778 JB |
227 | unsigned long flags; |
228 | u32 prim; | |
2908d778 JB |
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 | ||
c4028958 | 241 | void sas_porte_link_reset_err(struct work_struct *work) |
2908d778 | 242 | { |
c4028958 DH |
243 | struct asd_sas_event *ev = |
244 | container_of(work, struct asd_sas_event, work); | |
245 | struct asd_sas_phy *phy = ev->phy; | |
2908d778 JB |
246 | |
247 | sas_begin_event(PORTE_LINK_RESET_ERR, &phy->ha->event_lock, | |
248 | &phy->port_events_pending); | |
249 | ||
90f1e10d | 250 | sas_deform_port(phy, 1); |
2908d778 JB |
251 | } |
252 | ||
c4028958 | 253 | void sas_porte_timer_event(struct work_struct *work) |
2908d778 | 254 | { |
c4028958 DH |
255 | struct asd_sas_event *ev = |
256 | container_of(work, struct asd_sas_event, work); | |
257 | struct asd_sas_phy *phy = ev->phy; | |
2908d778 JB |
258 | |
259 | sas_begin_event(PORTE_TIMER_EVENT, &phy->ha->event_lock, | |
260 | &phy->port_events_pending); | |
261 | ||
90f1e10d | 262 | sas_deform_port(phy, 1); |
2908d778 JB |
263 | } |
264 | ||
c4028958 | 265 | void sas_porte_hard_reset(struct work_struct *work) |
2908d778 | 266 | { |
c4028958 DH |
267 | struct asd_sas_event *ev = |
268 | container_of(work, struct asd_sas_event, work); | |
269 | struct asd_sas_phy *phy = ev->phy; | |
2908d778 JB |
270 | |
271 | sas_begin_event(PORTE_HARD_RESET, &phy->ha->event_lock, | |
272 | &phy->port_events_pending); | |
273 | ||
90f1e10d | 274 | sas_deform_port(phy, 1); |
2908d778 JB |
275 | } |
276 | ||
277 | /* ---------- SAS port registration ---------- */ | |
278 | ||
279 | static void sas_init_port(struct asd_sas_port *port, | |
280 | struct sas_ha_struct *sas_ha, int i) | |
281 | { | |
a29c0515 | 282 | memset(port, 0, sizeof(*port)); |
2908d778 JB |
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); | |
2908d778 JB |
287 | port->ha = sas_ha; |
288 | ||
289 | spin_lock_init(&port->dev_list_lock); | |
290 | } | |
291 | ||
292 | int 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 | ||
306 | void 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) | |
90f1e10d | 312 | sas_deform_port(sas_ha->sas_phy[i], 0); |
2908d778 JB |
313 | |
314 | } |