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25#include <linux/scatterlist.h>
26#include <linux/slab.h>
27#include <scsi/scsi_host.h>
28#include <scsi/scsi_eh.h>
29#include "sas_internal.h"
30
31#include <scsi/scsi_transport.h>
32#include <scsi/scsi_transport_sas.h>
33#include "../scsi_sas_internal.h"
34
35
36
37void sas_init_dev(struct domain_device *dev)
38{
39 INIT_LIST_HEAD(&dev->siblings);
40 INIT_LIST_HEAD(&dev->dev_list_node);
41 switch (dev->dev_type) {
42 case SAS_END_DEV:
43 break;
44 case EDGE_DEV:
45 case FANOUT_DEV:
46 INIT_LIST_HEAD(&dev->ex_dev.children);
47 break;
48 case SATA_DEV:
49 case SATA_PM:
50 case SATA_PM_PORT:
51 INIT_LIST_HEAD(&dev->sata_dev.children);
52 break;
53 default:
54 break;
55 }
56}
57
58
59
60
61
62
63
64
65
66
67
68
69static int sas_get_port_device(struct asd_sas_port *port)
70{
71 unsigned long flags;
72 struct asd_sas_phy *phy;
73 struct sas_rphy *rphy;
74 struct domain_device *dev;
75
76 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
77 if (!dev)
78 return -ENOMEM;
79
80 spin_lock_irqsave(&port->phy_list_lock, flags);
81 if (list_empty(&port->phy_list)) {
82 spin_unlock_irqrestore(&port->phy_list_lock, flags);
83 kfree(dev);
84 return -ENODEV;
85 }
86 phy = container_of(port->phy_list.next, struct asd_sas_phy, port_phy_el);
87 spin_lock(&phy->frame_rcvd_lock);
88 memcpy(dev->frame_rcvd, phy->frame_rcvd, min(sizeof(dev->frame_rcvd),
89 (size_t)phy->frame_rcvd_size));
90 spin_unlock(&phy->frame_rcvd_lock);
91 spin_unlock_irqrestore(&port->phy_list_lock, flags);
92
93 if (dev->frame_rcvd[0] == 0x34 && port->oob_mode == SATA_OOB_MODE) {
94 struct dev_to_host_fis *fis =
95 (struct dev_to_host_fis *) dev->frame_rcvd;
96 if (fis->interrupt_reason == 1 && fis->lbal == 1 &&
97 fis->byte_count_low==0x69 && fis->byte_count_high == 0x96
98 && (fis->device & ~0x10) == 0)
99 dev->dev_type = SATA_PM;
100 else
101 dev->dev_type = SATA_DEV;
102 dev->tproto = SAS_PROTOCOL_SATA;
103 } else {
104 struct sas_identify_frame *id =
105 (struct sas_identify_frame *) dev->frame_rcvd;
106 dev->dev_type = id->dev_type;
107 dev->iproto = id->initiator_bits;
108 dev->tproto = id->target_bits;
109 }
110
111 sas_init_dev(dev);
112
113 switch (dev->dev_type) {
114 case SAS_END_DEV:
115 case SATA_DEV:
116 rphy = sas_end_device_alloc(port->port);
117 break;
118 case EDGE_DEV:
119 rphy = sas_expander_alloc(port->port,
120 SAS_EDGE_EXPANDER_DEVICE);
121 break;
122 case FANOUT_DEV:
123 rphy = sas_expander_alloc(port->port,
124 SAS_FANOUT_EXPANDER_DEVICE);
125 break;
126 default:
127 printk("ERROR: Unidentified device type %d\n", dev->dev_type);
128 rphy = NULL;
129 break;
130 }
131
132 if (!rphy) {
133 kfree(dev);
134 return -ENODEV;
135 }
136 rphy->identify.phy_identifier = phy->phy->identify.phy_identifier;
137 memcpy(dev->sas_addr, port->attached_sas_addr, SAS_ADDR_SIZE);
138 sas_fill_in_rphy(dev, rphy);
139 sas_hash_addr(dev->hashed_sas_addr, dev->sas_addr);
140 port->port_dev = dev;
141 dev->port = port;
142 dev->linkrate = port->linkrate;
143 dev->min_linkrate = port->linkrate;
144 dev->max_linkrate = port->linkrate;
145 dev->pathways = port->num_phys;
146 memset(port->disc.fanout_sas_addr, 0, SAS_ADDR_SIZE);
147 memset(port->disc.eeds_a, 0, SAS_ADDR_SIZE);
148 memset(port->disc.eeds_b, 0, SAS_ADDR_SIZE);
149 port->disc.max_level = 0;
150
151 dev->rphy = rphy;
152 spin_lock_irq(&port->dev_list_lock);
153 list_add_tail(&dev->dev_list_node, &port->dev_list);
154 spin_unlock_irq(&port->dev_list_lock);
155
156 return 0;
157}
158
159
160
161int sas_notify_lldd_dev_found(struct domain_device *dev)
162{
163 int res = 0;
164 struct sas_ha_struct *sas_ha = dev->port->ha;
165 struct Scsi_Host *shost = sas_ha->core.shost;
166 struct sas_internal *i = to_sas_internal(shost->transportt);
167
168 if (i->dft->lldd_dev_found) {
169 res = i->dft->lldd_dev_found(dev);
170 if (res) {
171 printk("sas: driver on pcidev %s cannot handle "
172 "device %llx, error:%d\n",
173 dev_name(sas_ha->dev),
174 SAS_ADDR(dev->sas_addr), res);
175 }
176 }
177 return res;
178}
179
180
181void sas_notify_lldd_dev_gone(struct domain_device *dev)
182{
183 struct sas_ha_struct *sas_ha = dev->port->ha;
184 struct Scsi_Host *shost = sas_ha->core.shost;
185 struct sas_internal *i = to_sas_internal(shost->transportt);
186
187 if (i->dft->lldd_dev_gone)
188 i->dft->lldd_dev_gone(dev);
189}
190
191
192
193
194
195
196
197
198
199
200int sas_discover_end_dev(struct domain_device *dev)
201{
202 int res;
203
204 res = sas_notify_lldd_dev_found(dev);
205 if (res)
206 goto out_err2;
207
208 res = sas_rphy_add(dev->rphy);
209 if (res)
210 goto out_err;
211
212 return 0;
213
214out_err:
215 sas_notify_lldd_dev_gone(dev);
216out_err2:
217 return res;
218}
219
220
221
222static void sas_unregister_common_dev(struct asd_sas_port *port, struct domain_device *dev)
223{
224 sas_notify_lldd_dev_gone(dev);
225 if (!dev->parent)
226 dev->port->port_dev = NULL;
227 else
228 list_del_init(&dev->siblings);
229
230 spin_lock_irq(&port->dev_list_lock);
231 list_del_init(&dev->dev_list_node);
232 spin_unlock_irq(&port->dev_list_lock);
233}
234
235void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *dev)
236{
237 if (dev->rphy) {
238 sas_remove_children(&dev->rphy->dev);
239 sas_rphy_delete(dev->rphy);
240 dev->rphy = NULL;
241 }
242 if (dev->dev_type == EDGE_DEV || dev->dev_type == FANOUT_DEV) {
243
244 kfree(dev->ex_dev.ex_phy);
245 dev->ex_dev.ex_phy = NULL;
246 }
247 sas_unregister_common_dev(port, dev);
248}
249
250void sas_unregister_domain_devices(struct asd_sas_port *port)
251{
252 struct domain_device *dev, *n;
253
254 list_for_each_entry_safe_reverse(dev, n, &port->dev_list, dev_list_node)
255 sas_unregister_dev(port, dev);
256
257 port->port->rphy = NULL;
258
259}
260
261
262
263
264
265
266
267
268
269
270
271
272static void sas_discover_domain(struct work_struct *work)
273{
274 struct domain_device *dev;
275 int error = 0;
276 struct sas_discovery_event *ev =
277 container_of(work, struct sas_discovery_event, work);
278 struct asd_sas_port *port = ev->port;
279
280 sas_begin_event(DISCE_DISCOVER_DOMAIN, &port->disc.disc_event_lock,
281 &port->disc.pending);
282
283 if (port->port_dev)
284 return;
285
286 error = sas_get_port_device(port);
287 if (error)
288 return;
289 dev = port->port_dev;
290
291 SAS_DPRINTK("DOING DISCOVERY on port %d, pid:%d\n", port->id,
292 task_pid_nr(current));
293
294 switch (dev->dev_type) {
295 case SAS_END_DEV:
296 error = sas_discover_end_dev(dev);
297 break;
298 case EDGE_DEV:
299 case FANOUT_DEV:
300 error = sas_discover_root_expander(dev);
301 break;
302 case SATA_DEV:
303 case SATA_PM:
304#ifdef CONFIG_SCSI_SAS_ATA
305 error = sas_discover_sata(dev);
306 break;
307#else
308 SAS_DPRINTK("ATA device seen but CONFIG_SCSI_SAS_ATA=N so cannot attach\n");
309
310#endif
311 default:
312 error = -ENXIO;
313 SAS_DPRINTK("unhandled device %d\n", dev->dev_type);
314 break;
315 }
316
317 if (error) {
318 sas_rphy_free(dev->rphy);
319 dev->rphy = NULL;
320
321 spin_lock_irq(&port->dev_list_lock);
322 list_del_init(&dev->dev_list_node);
323 spin_unlock_irq(&port->dev_list_lock);
324
325 kfree(dev);
326 port->port_dev = NULL;
327 }
328
329 SAS_DPRINTK("DONE DISCOVERY on port %d, pid:%d, result:%d\n", port->id,
330 task_pid_nr(current), error);
331}
332
333static void sas_revalidate_domain(struct work_struct *work)
334{
335 int res = 0;
336 struct sas_discovery_event *ev =
337 container_of(work, struct sas_discovery_event, work);
338 struct asd_sas_port *port = ev->port;
339
340 sas_begin_event(DISCE_REVALIDATE_DOMAIN, &port->disc.disc_event_lock,
341 &port->disc.pending);
342
343 SAS_DPRINTK("REVALIDATING DOMAIN on port %d, pid:%d\n", port->id,
344 task_pid_nr(current));
345 if (port->port_dev)
346 res = sas_ex_revalidate_domain(port->port_dev);
347
348 SAS_DPRINTK("done REVALIDATING DOMAIN on port %d, pid:%d, res 0x%x\n",
349 port->id, task_pid_nr(current), res);
350}
351
352
353
354int sas_discover_event(struct asd_sas_port *port, enum discover_event ev)
355{
356 struct sas_discovery *disc;
357
358 if (!port)
359 return 0;
360 disc = &port->disc;
361
362 BUG_ON(ev >= DISC_NUM_EVENTS);
363
364 sas_queue_event(ev, &disc->disc_event_lock, &disc->pending,
365 &disc->disc_work[ev].work, port->ha);
366
367 return 0;
368}
369
370
371
372
373
374
375
376void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *port)
377{
378 int i;
379
380 static const work_func_t sas_event_fns[DISC_NUM_EVENTS] = {
381 [DISCE_DISCOVER_DOMAIN] = sas_discover_domain,
382 [DISCE_REVALIDATE_DOMAIN] = sas_revalidate_domain,
383 };
384
385 spin_lock_init(&disc->disc_event_lock);
386 disc->pending = 0;
387 for (i = 0; i < DISC_NUM_EVENTS; i++) {
388 INIT_WORK(&disc->disc_work[i].work, sas_event_fns[i]);
389 disc->disc_work[i].port = port;
390 }
391}
392