Commit | Line | Data |
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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 | ||
303694ee DW |
42 | static 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); | |
0558f33c | 69 | sas_destruct_devices(port); |
303694ee DW |
70 | continue; |
71 | } | |
72 | ||
aa9f8328 | 73 | if (dev->dev_type == SAS_EDGE_EXPANDER_DEVICE || dev->dev_type == SAS_FANOUT_EXPANDER_DEVICE) { |
303694ee DW |
74 | dev->ex_dev.ex_change_count = -1; |
75 | for (i = 0; i < dev->ex_dev.num_phys; i++) { | |
76 | struct ex_phy *phy = &dev->ex_dev.ex_phy[i]; | |
77 | ||
78 | phy->phy_change_count = -1; | |
79 | } | |
80 | } | |
81 | } | |
82 | ||
83 | sas_discover_event(port, DISCE_RESUME); | |
84 | } | |
85 | ||
2908d778 | 86 | /** |
121246ae | 87 | * sas_form_port - add this phy to a port |
2908d778 JB |
88 | * @phy: the phy of interest |
89 | * | |
90 | * This function adds this phy to an existing port, thus creating a wide | |
91 | * port, or it creates a port and adds the phy to the port. | |
92 | */ | |
93 | static void sas_form_port(struct asd_sas_phy *phy) | |
94 | { | |
95 | int i; | |
96 | struct sas_ha_struct *sas_ha = phy->ha; | |
97 | struct asd_sas_port *port = phy->port; | |
98 | struct sas_internal *si = | |
99 | to_sas_internal(sas_ha->core.shost->transportt); | |
980fa2f9 | 100 | unsigned long flags; |
2908d778 JB |
101 | |
102 | if (port) { | |
00f0254e | 103 | if (!phy_is_wideport_member(port, phy)) |
90f1e10d | 104 | sas_deform_port(phy, 0); |
303694ee DW |
105 | else if (phy->suspended) { |
106 | phy->suspended = 0; | |
107 | sas_resume_port(phy); | |
108 | ||
109 | /* phy came back, try to cancel the timeout */ | |
110 | wake_up(&sas_ha->eh_wait_q); | |
111 | return; | |
112 | } else { | |
2908d778 | 113 | SAS_DPRINTK("%s: phy%d belongs to port%d already(%d)!\n", |
cadbd4a5 | 114 | __func__, phy->id, phy->port->id, |
2908d778 JB |
115 | phy->port->num_phys); |
116 | return; | |
117 | } | |
118 | } | |
119 | ||
5381837f | 120 | /* see if the phy should be part of a wide port */ |
980fa2f9 | 121 | spin_lock_irqsave(&sas_ha->phy_port_lock, flags); |
2908d778 JB |
122 | for (i = 0; i < sas_ha->num_phys; i++) { |
123 | port = sas_ha->sas_port[i]; | |
124 | spin_lock(&port->phy_list_lock); | |
125 | if (*(u64 *) port->sas_addr && | |
00f0254e | 126 | phy_is_wideport_member(port, phy) && port->num_phys > 0) { |
2908d778 JB |
127 | /* wide port */ |
128 | SAS_DPRINTK("phy%d matched wide port%d\n", phy->id, | |
129 | port->id); | |
130 | break; | |
2908d778 JB |
131 | } |
132 | spin_unlock(&port->phy_list_lock); | |
133 | } | |
5381837f TP |
134 | /* The phy does not match any existing port, create a new one */ |
135 | if (i == sas_ha->num_phys) { | |
136 | for (i = 0; i < sas_ha->num_phys; i++) { | |
137 | port = sas_ha->sas_port[i]; | |
138 | spin_lock(&port->phy_list_lock); | |
139 | if (*(u64 *)port->sas_addr == 0 | |
140 | && port->num_phys == 0) { | |
141 | memcpy(port->sas_addr, phy->sas_addr, | |
142 | SAS_ADDR_SIZE); | |
143 | break; | |
144 | } | |
145 | spin_unlock(&port->phy_list_lock); | |
146 | } | |
147 | } | |
2908d778 JB |
148 | |
149 | if (i >= sas_ha->num_phys) { | |
150 | printk(KERN_NOTICE "%s: couldn't find a free port, bug?\n", | |
cadbd4a5 | 151 | __func__); |
980fa2f9 | 152 | spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags); |
2908d778 JB |
153 | return; |
154 | } | |
155 | ||
156 | /* add the phy to the port */ | |
157 | list_add_tail(&phy->port_phy_el, &port->phy_list); | |
899fcf40 | 158 | sas_phy_set_target(phy, port->port_dev); |
2908d778 JB |
159 | phy->port = port; |
160 | port->num_phys++; | |
161 | port->phy_mask |= (1U << phy->id); | |
162 | ||
2908d778 JB |
163 | if (*(u64 *)port->attached_sas_addr == 0) { |
164 | port->class = phy->class; | |
165 | memcpy(port->attached_sas_addr, phy->attached_sas_addr, | |
166 | SAS_ADDR_SIZE); | |
167 | port->iproto = phy->iproto; | |
168 | port->tproto = phy->tproto; | |
169 | port->oob_mode = phy->oob_mode; | |
170 | port->linkrate = phy->linkrate; | |
171 | } else | |
172 | port->linkrate = max(port->linkrate, phy->linkrate); | |
173 | spin_unlock(&port->phy_list_lock); | |
980fa2f9 | 174 | spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags); |
2908d778 JB |
175 | |
176 | if (!port->port) { | |
b4698d88 | 177 | port->port = sas_port_alloc(phy->phy->dev.parent, port->id); |
2908d778 JB |
178 | BUG_ON(!port->port); |
179 | sas_port_add(port->port); | |
180 | } | |
181 | sas_port_add_phy(port->port, phy->phy); | |
182 | ||
a29c0515 | 183 | SAS_DPRINTK("%s added to %s, phy_mask:0x%x (%16llx)\n", |
71610f55 | 184 | dev_name(&phy->phy->dev), dev_name(&port->port->dev), |
a29c0515 JB |
185 | port->phy_mask, |
186 | SAS_ADDR(port->attached_sas_addr)); | |
187 | ||
2908d778 JB |
188 | if (port->port_dev) |
189 | port->port_dev->pathways = port->num_phys; | |
190 | ||
191 | /* Tell the LLDD about this port formation. */ | |
192 | if (si->dft->lldd_port_formed) | |
193 | si->dft->lldd_port_formed(phy); | |
194 | ||
195 | sas_discover_event(phy->port, DISCE_DISCOVER_DOMAIN); | |
517e5153 | 196 | flush_workqueue(sas_ha->disco_q); |
2908d778 JB |
197 | } |
198 | ||
199 | /** | |
121246ae | 200 | * sas_deform_port - remove this phy from the port it belongs to |
2908d778 | 201 | * @phy: the phy of interest |
121246ae | 202 | * @gone: whether or not the PHY is gone |
2908d778 JB |
203 | * |
204 | * This is called when the physical link to the other phy has been | |
205 | * lost (on this phy), in Event thread context. We cannot delay here. | |
206 | */ | |
90f1e10d | 207 | void sas_deform_port(struct asd_sas_phy *phy, int gone) |
2908d778 JB |
208 | { |
209 | struct sas_ha_struct *sas_ha = phy->ha; | |
210 | struct asd_sas_port *port = phy->port; | |
211 | struct sas_internal *si = | |
212 | to_sas_internal(sas_ha->core.shost->transportt); | |
90f1e10d | 213 | struct domain_device *dev; |
980fa2f9 | 214 | unsigned long flags; |
2908d778 JB |
215 | |
216 | if (!port) | |
217 | return; /* done by a phy event */ | |
218 | ||
90f1e10d DW |
219 | dev = port->port_dev; |
220 | if (dev) | |
221 | dev->pathways--; | |
2908d778 JB |
222 | |
223 | if (port->num_phys == 1) { | |
7d05919a | 224 | sas_unregister_domain_devices(port, gone); |
0558f33c | 225 | sas_destruct_devices(port); |
2908d778 JB |
226 | sas_port_delete(port->port); |
227 | port->port = NULL; | |
f41a0c44 | 228 | } else { |
2908d778 | 229 | sas_port_delete_phy(port->port, phy->phy); |
f41a0c44 DW |
230 | sas_device_set_phy(dev, port->port); |
231 | } | |
2908d778 | 232 | |
2908d778 JB |
233 | if (si->dft->lldd_port_deformed) |
234 | si->dft->lldd_port_deformed(phy); | |
235 | ||
980fa2f9 | 236 | spin_lock_irqsave(&sas_ha->phy_port_lock, flags); |
2908d778 JB |
237 | spin_lock(&port->phy_list_lock); |
238 | ||
239 | list_del_init(&phy->port_phy_el); | |
899fcf40 | 240 | sas_phy_set_target(phy, NULL); |
2908d778 JB |
241 | phy->port = NULL; |
242 | port->num_phys--; | |
243 | port->phy_mask &= ~(1U << phy->id); | |
244 | ||
245 | if (port->num_phys == 0) { | |
246 | INIT_LIST_HEAD(&port->phy_list); | |
247 | memset(port->sas_addr, 0, SAS_ADDR_SIZE); | |
248 | memset(port->attached_sas_addr, 0, SAS_ADDR_SIZE); | |
249 | port->class = 0; | |
250 | port->iproto = 0; | |
251 | port->tproto = 0; | |
252 | port->oob_mode = 0; | |
253 | port->phy_mask = 0; | |
254 | } | |
255 | spin_unlock(&port->phy_list_lock); | |
980fa2f9 | 256 | spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags); |
2908d778 JB |
257 | |
258 | return; | |
259 | } | |
260 | ||
261 | /* ---------- SAS port events ---------- */ | |
262 | ||
c4028958 | 263 | void sas_porte_bytes_dmaed(struct work_struct *work) |
2908d778 | 264 | { |
22b9153f | 265 | struct asd_sas_event *ev = to_asd_sas_event(work); |
c4028958 | 266 | struct asd_sas_phy *phy = ev->phy; |
2908d778 | 267 | |
2908d778 JB |
268 | sas_form_port(phy); |
269 | } | |
270 | ||
c4028958 | 271 | void sas_porte_broadcast_rcvd(struct work_struct *work) |
2908d778 | 272 | { |
22b9153f | 273 | struct asd_sas_event *ev = to_asd_sas_event(work); |
c4028958 | 274 | struct asd_sas_phy *phy = ev->phy; |
2908d778 JB |
275 | unsigned long flags; |
276 | u32 prim; | |
2908d778 | 277 | |
2908d778 JB |
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); | |
517e5153 JY |
284 | |
285 | if (phy->port) | |
286 | flush_workqueue(phy->port->ha->disco_q); | |
2908d778 JB |
287 | } |
288 | ||
c4028958 | 289 | void sas_porte_link_reset_err(struct work_struct *work) |
2908d778 | 290 | { |
22b9153f | 291 | struct asd_sas_event *ev = to_asd_sas_event(work); |
c4028958 | 292 | struct asd_sas_phy *phy = ev->phy; |
2908d778 | 293 | |
90f1e10d | 294 | sas_deform_port(phy, 1); |
2908d778 JB |
295 | } |
296 | ||
c4028958 | 297 | void sas_porte_timer_event(struct work_struct *work) |
2908d778 | 298 | { |
22b9153f | 299 | struct asd_sas_event *ev = to_asd_sas_event(work); |
c4028958 | 300 | struct asd_sas_phy *phy = ev->phy; |
2908d778 | 301 | |
90f1e10d | 302 | sas_deform_port(phy, 1); |
2908d778 JB |
303 | } |
304 | ||
c4028958 | 305 | void sas_porte_hard_reset(struct work_struct *work) |
2908d778 | 306 | { |
22b9153f | 307 | struct asd_sas_event *ev = to_asd_sas_event(work); |
c4028958 | 308 | struct asd_sas_phy *phy = ev->phy; |
2908d778 | 309 | |
90f1e10d | 310 | sas_deform_port(phy, 1); |
2908d778 JB |
311 | } |
312 | ||
313 | /* ---------- SAS port registration ---------- */ | |
314 | ||
315 | static void sas_init_port(struct asd_sas_port *port, | |
316 | struct sas_ha_struct *sas_ha, int i) | |
317 | { | |
a29c0515 | 318 | memset(port, 0, sizeof(*port)); |
2908d778 JB |
319 | port->id = i; |
320 | INIT_LIST_HEAD(&port->dev_list); | |
87c8331f DW |
321 | INIT_LIST_HEAD(&port->disco_list); |
322 | INIT_LIST_HEAD(&port->destroy_list); | |
0558f33c | 323 | INIT_LIST_HEAD(&port->sas_port_del_list); |
2908d778 JB |
324 | spin_lock_init(&port->phy_list_lock); |
325 | INIT_LIST_HEAD(&port->phy_list); | |
2908d778 JB |
326 | port->ha = sas_ha; |
327 | ||
328 | spin_lock_init(&port->dev_list_lock); | |
329 | } | |
330 | ||
331 | int sas_register_ports(struct sas_ha_struct *sas_ha) | |
332 | { | |
333 | int i; | |
334 | ||
335 | /* initialize the ports and discovery */ | |
336 | for (i = 0; i < sas_ha->num_phys; i++) { | |
337 | struct asd_sas_port *port = sas_ha->sas_port[i]; | |
338 | ||
339 | sas_init_port(port, sas_ha, i); | |
340 | sas_init_disc(&port->disc, port); | |
341 | } | |
342 | return 0; | |
343 | } | |
344 | ||
345 | void sas_unregister_ports(struct sas_ha_struct *sas_ha) | |
346 | { | |
347 | int i; | |
348 | ||
349 | for (i = 0; i < sas_ha->num_phys; i++) | |
350 | if (sas_ha->sas_phy[i]->port) | |
90f1e10d | 351 | sas_deform_port(sas_ha->sas_phy[i], 0); |
2908d778 JB |
352 | |
353 | } | |
1c393b97 JY |
354 | |
355 | const work_func_t sas_port_event_fns[PORT_NUM_EVENTS] = { | |
356 | [PORTE_BYTES_DMAED] = sas_porte_bytes_dmaed, | |
357 | [PORTE_BROADCAST_RCVD] = sas_porte_broadcast_rcvd, | |
358 | [PORTE_LINK_RESET_ERR] = sas_porte_link_reset_err, | |
359 | [PORTE_TIMER_EVENT] = sas_porte_timer_event, | |
360 | [PORTE_HARD_RESET] = sas_porte_hard_reset, | |
361 | }; |