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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); | |
899fcf40 | 107 | sas_phy_set_target(phy, port->port_dev); |
2908d778 JB |
108 | phy->port = port; |
109 | port->num_phys++; | |
110 | port->phy_mask |= (1U << phy->id); | |
111 | ||
2908d778 JB |
112 | if (*(u64 *)port->attached_sas_addr == 0) { |
113 | port->class = phy->class; | |
114 | memcpy(port->attached_sas_addr, phy->attached_sas_addr, | |
115 | SAS_ADDR_SIZE); | |
116 | port->iproto = phy->iproto; | |
117 | port->tproto = phy->tproto; | |
118 | port->oob_mode = phy->oob_mode; | |
119 | port->linkrate = phy->linkrate; | |
120 | } else | |
121 | port->linkrate = max(port->linkrate, phy->linkrate); | |
122 | spin_unlock(&port->phy_list_lock); | |
980fa2f9 | 123 | spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags); |
2908d778 JB |
124 | |
125 | if (!port->port) { | |
b4698d88 | 126 | port->port = sas_port_alloc(phy->phy->dev.parent, port->id); |
2908d778 JB |
127 | BUG_ON(!port->port); |
128 | sas_port_add(port->port); | |
129 | } | |
130 | sas_port_add_phy(port->port, phy->phy); | |
131 | ||
a29c0515 | 132 | SAS_DPRINTK("%s added to %s, phy_mask:0x%x (%16llx)\n", |
71610f55 | 133 | dev_name(&phy->phy->dev), dev_name(&port->port->dev), |
a29c0515 JB |
134 | port->phy_mask, |
135 | SAS_ADDR(port->attached_sas_addr)); | |
136 | ||
2908d778 JB |
137 | if (port->port_dev) |
138 | port->port_dev->pathways = port->num_phys; | |
139 | ||
140 | /* Tell the LLDD about this port formation. */ | |
141 | if (si->dft->lldd_port_formed) | |
142 | si->dft->lldd_port_formed(phy); | |
143 | ||
144 | sas_discover_event(phy->port, DISCE_DISCOVER_DOMAIN); | |
145 | } | |
146 | ||
147 | /** | |
148 | * sas_deform_port -- remove this phy from the port it belongs to | |
149 | * @phy: the phy of interest | |
150 | * | |
151 | * This is called when the physical link to the other phy has been | |
152 | * lost (on this phy), in Event thread context. We cannot delay here. | |
153 | */ | |
90f1e10d | 154 | void sas_deform_port(struct asd_sas_phy *phy, int gone) |
2908d778 JB |
155 | { |
156 | struct sas_ha_struct *sas_ha = phy->ha; | |
157 | struct asd_sas_port *port = phy->port; | |
158 | struct sas_internal *si = | |
159 | to_sas_internal(sas_ha->core.shost->transportt); | |
90f1e10d | 160 | struct domain_device *dev; |
980fa2f9 | 161 | unsigned long flags; |
2908d778 JB |
162 | |
163 | if (!port) | |
164 | return; /* done by a phy event */ | |
165 | ||
90f1e10d DW |
166 | dev = port->port_dev; |
167 | if (dev) | |
168 | dev->pathways--; | |
2908d778 JB |
169 | |
170 | if (port->num_phys == 1) { | |
7d05919a | 171 | sas_unregister_domain_devices(port, gone); |
2908d778 JB |
172 | sas_port_delete(port->port); |
173 | port->port = NULL; | |
f41a0c44 | 174 | } else { |
2908d778 | 175 | sas_port_delete_phy(port->port, phy->phy); |
f41a0c44 DW |
176 | sas_device_set_phy(dev, port->port); |
177 | } | |
2908d778 | 178 | |
2908d778 JB |
179 | if (si->dft->lldd_port_deformed) |
180 | si->dft->lldd_port_deformed(phy); | |
181 | ||
980fa2f9 | 182 | spin_lock_irqsave(&sas_ha->phy_port_lock, flags); |
2908d778 JB |
183 | spin_lock(&port->phy_list_lock); |
184 | ||
185 | list_del_init(&phy->port_phy_el); | |
899fcf40 | 186 | sas_phy_set_target(phy, NULL); |
2908d778 JB |
187 | phy->port = NULL; |
188 | port->num_phys--; | |
189 | port->phy_mask &= ~(1U << phy->id); | |
190 | ||
191 | if (port->num_phys == 0) { | |
192 | INIT_LIST_HEAD(&port->phy_list); | |
193 | memset(port->sas_addr, 0, SAS_ADDR_SIZE); | |
194 | memset(port->attached_sas_addr, 0, SAS_ADDR_SIZE); | |
195 | port->class = 0; | |
196 | port->iproto = 0; | |
197 | port->tproto = 0; | |
198 | port->oob_mode = 0; | |
199 | port->phy_mask = 0; | |
200 | } | |
201 | spin_unlock(&port->phy_list_lock); | |
980fa2f9 | 202 | spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags); |
2908d778 JB |
203 | |
204 | return; | |
205 | } | |
206 | ||
207 | /* ---------- SAS port events ---------- */ | |
208 | ||
c4028958 | 209 | void sas_porte_bytes_dmaed(struct work_struct *work) |
2908d778 | 210 | { |
22b9153f | 211 | struct asd_sas_event *ev = to_asd_sas_event(work); |
c4028958 | 212 | struct asd_sas_phy *phy = ev->phy; |
2908d778 | 213 | |
b15ebe0b | 214 | clear_bit(PORTE_BYTES_DMAED, &phy->port_events_pending); |
2908d778 JB |
215 | |
216 | sas_form_port(phy); | |
217 | } | |
218 | ||
c4028958 | 219 | void sas_porte_broadcast_rcvd(struct work_struct *work) |
2908d778 | 220 | { |
22b9153f | 221 | struct asd_sas_event *ev = to_asd_sas_event(work); |
c4028958 | 222 | struct asd_sas_phy *phy = ev->phy; |
2908d778 JB |
223 | unsigned long flags; |
224 | u32 prim; | |
2908d778 | 225 | |
b15ebe0b | 226 | clear_bit(PORTE_BROADCAST_RCVD, &phy->port_events_pending); |
2908d778 JB |
227 | |
228 | spin_lock_irqsave(&phy->sas_prim_lock, flags); | |
229 | prim = phy->sas_prim; | |
230 | spin_unlock_irqrestore(&phy->sas_prim_lock, flags); | |
231 | ||
232 | SAS_DPRINTK("broadcast received: %d\n", prim); | |
233 | sas_discover_event(phy->port, DISCE_REVALIDATE_DOMAIN); | |
234 | } | |
235 | ||
c4028958 | 236 | void sas_porte_link_reset_err(struct work_struct *work) |
2908d778 | 237 | { |
22b9153f | 238 | struct asd_sas_event *ev = to_asd_sas_event(work); |
c4028958 | 239 | struct asd_sas_phy *phy = ev->phy; |
2908d778 | 240 | |
b15ebe0b | 241 | clear_bit(PORTE_LINK_RESET_ERR, &phy->port_events_pending); |
2908d778 | 242 | |
90f1e10d | 243 | sas_deform_port(phy, 1); |
2908d778 JB |
244 | } |
245 | ||
c4028958 | 246 | void sas_porte_timer_event(struct work_struct *work) |
2908d778 | 247 | { |
22b9153f | 248 | struct asd_sas_event *ev = to_asd_sas_event(work); |
c4028958 | 249 | struct asd_sas_phy *phy = ev->phy; |
2908d778 | 250 | |
b15ebe0b | 251 | clear_bit(PORTE_TIMER_EVENT, &phy->port_events_pending); |
2908d778 | 252 | |
90f1e10d | 253 | sas_deform_port(phy, 1); |
2908d778 JB |
254 | } |
255 | ||
c4028958 | 256 | void sas_porte_hard_reset(struct work_struct *work) |
2908d778 | 257 | { |
22b9153f | 258 | struct asd_sas_event *ev = to_asd_sas_event(work); |
c4028958 | 259 | struct asd_sas_phy *phy = ev->phy; |
2908d778 | 260 | |
b15ebe0b | 261 | clear_bit(PORTE_HARD_RESET, &phy->port_events_pending); |
2908d778 | 262 | |
90f1e10d | 263 | sas_deform_port(phy, 1); |
2908d778 JB |
264 | } |
265 | ||
266 | /* ---------- SAS port registration ---------- */ | |
267 | ||
268 | static void sas_init_port(struct asd_sas_port *port, | |
269 | struct sas_ha_struct *sas_ha, int i) | |
270 | { | |
a29c0515 | 271 | memset(port, 0, sizeof(*port)); |
2908d778 JB |
272 | port->id = i; |
273 | INIT_LIST_HEAD(&port->dev_list); | |
87c8331f DW |
274 | INIT_LIST_HEAD(&port->disco_list); |
275 | INIT_LIST_HEAD(&port->destroy_list); | |
2908d778 JB |
276 | spin_lock_init(&port->phy_list_lock); |
277 | INIT_LIST_HEAD(&port->phy_list); | |
2908d778 JB |
278 | port->ha = sas_ha; |
279 | ||
280 | spin_lock_init(&port->dev_list_lock); | |
281 | } | |
282 | ||
283 | int sas_register_ports(struct sas_ha_struct *sas_ha) | |
284 | { | |
285 | int i; | |
286 | ||
287 | /* initialize the ports and discovery */ | |
288 | for (i = 0; i < sas_ha->num_phys; i++) { | |
289 | struct asd_sas_port *port = sas_ha->sas_port[i]; | |
290 | ||
291 | sas_init_port(port, sas_ha, i); | |
292 | sas_init_disc(&port->disc, port); | |
293 | } | |
294 | return 0; | |
295 | } | |
296 | ||
297 | void sas_unregister_ports(struct sas_ha_struct *sas_ha) | |
298 | { | |
299 | int i; | |
300 | ||
301 | for (i = 0; i < sas_ha->num_phys; i++) | |
302 | if (sas_ha->sas_phy[i]->port) | |
90f1e10d | 303 | sas_deform_port(sas_ha->sas_phy[i], 0); |
2908d778 JB |
304 | |
305 | } |