summaryrefslogtreecommitdiff
path: root/drivers/scsi/smartpqi/smartpqi_sas_transport.c
blob: 52ca4f93f1b2577e1e3e750d5faa78adb173b486 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
/*
 *    driver for Microsemi PQI-based storage controllers
 *    Copyright (c) 2016 Microsemi Corporation
 *    Copyright (c) 2016 PMC-Sierra, Inc.
 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; version 2 of the License.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
 *    NON INFRINGEMENT.  See the GNU General Public License for more details.
 *
 *    Questions/Comments/Bugfixes to esc.storagedev@microsemi.com
 *
 */

#include <linux/kernel.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_transport_sas.h>
#include "smartpqi.h"

static struct pqi_sas_phy *pqi_alloc_sas_phy(struct pqi_sas_port *pqi_sas_port)
{
	struct pqi_sas_phy *pqi_sas_phy;
	struct sas_phy *phy;

	pqi_sas_phy = kzalloc(sizeof(*pqi_sas_phy), GFP_KERNEL);
	if (!pqi_sas_phy)
		return NULL;

	phy = sas_phy_alloc(pqi_sas_port->parent_node->parent_dev,
		pqi_sas_port->next_phy_index);
	if (!phy) {
		kfree(pqi_sas_phy);
		return NULL;
	}

	pqi_sas_port->next_phy_index++;
	pqi_sas_phy->phy = phy;
	pqi_sas_phy->parent_port = pqi_sas_port;

	return pqi_sas_phy;
}

static void pqi_free_sas_phy(struct pqi_sas_phy *pqi_sas_phy)
{
	struct sas_phy *phy = pqi_sas_phy->phy;

	sas_port_delete_phy(pqi_sas_phy->parent_port->port, phy);
	sas_phy_free(phy);
	if (pqi_sas_phy->added_to_port)
		list_del(&pqi_sas_phy->phy_list_entry);
	kfree(pqi_sas_phy);
}

static int pqi_sas_port_add_phy(struct pqi_sas_phy *pqi_sas_phy)
{
	int rc;
	struct pqi_sas_port *pqi_sas_port;
	struct sas_phy *phy;
	struct sas_identify *identify;

	pqi_sas_port = pqi_sas_phy->parent_port;
	phy = pqi_sas_phy->phy;

	identify = &phy->identify;
	memset(identify, 0, sizeof(*identify));
	identify->sas_address = pqi_sas_port->sas_address;
	identify->device_type = SAS_END_DEVICE;
	identify->initiator_port_protocols = SAS_PROTOCOL_STP;
	identify->target_port_protocols = SAS_PROTOCOL_STP;
	phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
	phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
	phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN;
	phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN;
	phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;

	rc = sas_phy_add(pqi_sas_phy->phy);
	if (rc)
		return rc;

	sas_port_add_phy(pqi_sas_port->port, pqi_sas_phy->phy);
	list_add_tail(&pqi_sas_phy->phy_list_entry,
		&pqi_sas_port->phy_list_head);
	pqi_sas_phy->added_to_port = true;

	return 0;
}

static int pqi_sas_port_add_rphy(struct pqi_sas_port *pqi_sas_port,
	struct sas_rphy *rphy)
{
	struct sas_identify *identify;

	identify = &rphy->identify;
	identify->sas_address = pqi_sas_port->sas_address;
	identify->initiator_port_protocols = SAS_PROTOCOL_STP;
	identify->target_port_protocols = SAS_PROTOCOL_STP;

	return sas_rphy_add(rphy);
}

static struct pqi_sas_port *pqi_alloc_sas_port(
	struct pqi_sas_node *pqi_sas_node, u64 sas_address)
{
	int rc;
	struct pqi_sas_port *pqi_sas_port;
	struct sas_port *port;

	pqi_sas_port = kzalloc(sizeof(*pqi_sas_port), GFP_KERNEL);
	if (!pqi_sas_port)
		return NULL;

	INIT_LIST_HEAD(&pqi_sas_port->phy_list_head);
	pqi_sas_port->parent_node = pqi_sas_node;

	port = sas_port_alloc_num(pqi_sas_node->parent_dev);
	if (!port)
		goto free_pqi_port;

	rc = sas_port_add(port);
	if (rc)
		goto free_sas_port;

	pqi_sas_port->port = port;
	pqi_sas_port->sas_address = sas_address;
	list_add_tail(&pqi_sas_port->port_list_entry,
		&pqi_sas_node->port_list_head);

	return pqi_sas_port;

free_sas_port:
	sas_port_free(port);
free_pqi_port:
	kfree(pqi_sas_port);

	return NULL;
}

static void pqi_free_sas_port(struct pqi_sas_port *pqi_sas_port)
{
	struct pqi_sas_phy *pqi_sas_phy;
	struct pqi_sas_phy *next;

	list_for_each_entry_safe(pqi_sas_phy, next,
			&pqi_sas_port->phy_list_head, phy_list_entry)
		pqi_free_sas_phy(pqi_sas_phy);

	sas_port_delete(pqi_sas_port->port);
	list_del(&pqi_sas_port->port_list_entry);
	kfree(pqi_sas_port);
}

static struct pqi_sas_node *pqi_alloc_sas_node(struct device *parent_dev)
{
	struct pqi_sas_node *pqi_sas_node;

	pqi_sas_node = kzalloc(sizeof(*pqi_sas_node), GFP_KERNEL);
	if (pqi_sas_node) {
		pqi_sas_node->parent_dev = parent_dev;
		INIT_LIST_HEAD(&pqi_sas_node->port_list_head);
	}

	return pqi_sas_node;
}

static void pqi_free_sas_node(struct pqi_sas_node *pqi_sas_node)
{
	struct pqi_sas_port *pqi_sas_port;
	struct pqi_sas_port *next;

	if (!pqi_sas_node)
		return;

	list_for_each_entry_safe(pqi_sas_port, next,
			&pqi_sas_node->port_list_head, port_list_entry)
		pqi_free_sas_port(pqi_sas_port);

	kfree(pqi_sas_node);
}

struct pqi_scsi_dev *pqi_find_device_by_sas_rphy(
	struct pqi_ctrl_info *ctrl_info, struct sas_rphy *rphy)
{
	struct pqi_scsi_dev *device;

	list_for_each_entry(device, &ctrl_info->scsi_device_list,
		scsi_device_list_entry) {
		if (!device->sas_port)
			continue;
		if (device->sas_port->rphy == rphy)
			return device;
	}

	return NULL;
}

int pqi_add_sas_host(struct Scsi_Host *shost, struct pqi_ctrl_info *ctrl_info)
{
	int rc;
	struct device *parent_dev;
	struct pqi_sas_node *pqi_sas_node;
	struct pqi_sas_port *pqi_sas_port;
	struct pqi_sas_phy *pqi_sas_phy;

	parent_dev = &shost->shost_gendev;

	pqi_sas_node = pqi_alloc_sas_node(parent_dev);
	if (!pqi_sas_node)
		return -ENOMEM;

	pqi_sas_port = pqi_alloc_sas_port(pqi_sas_node, ctrl_info->sas_address);
	if (!pqi_sas_port) {
		rc = -ENODEV;
		goto free_sas_node;
	}

	pqi_sas_phy = pqi_alloc_sas_phy(pqi_sas_port);
	if (!pqi_sas_phy) {
		rc = -ENODEV;
		goto free_sas_port;
	}

	rc = pqi_sas_port_add_phy(pqi_sas_phy);
	if (rc)
		goto free_sas_phy;

	ctrl_info->sas_host = pqi_sas_node;

	return 0;

free_sas_phy:
	pqi_free_sas_phy(pqi_sas_phy);
free_sas_port:
	pqi_free_sas_port(pqi_sas_port);
free_sas_node:
	pqi_free_sas_node(pqi_sas_node);

	return rc;
}

void pqi_delete_sas_host(struct pqi_ctrl_info *ctrl_info)
{
	pqi_free_sas_node(ctrl_info->sas_host);
}

int pqi_add_sas_device(struct pqi_sas_node *pqi_sas_node,
	struct pqi_scsi_dev *device)
{
	int rc;
	struct pqi_sas_port *pqi_sas_port;
	struct sas_rphy *rphy;

	pqi_sas_port = pqi_alloc_sas_port(pqi_sas_node, device->sas_address);
	if (!pqi_sas_port)
		return -ENOMEM;

	rphy = sas_end_device_alloc(pqi_sas_port->port);
	if (!rphy) {
		rc = -ENODEV;
		goto free_sas_port;
	}

	pqi_sas_port->rphy = rphy;
	device->sas_port = pqi_sas_port;

	rc = pqi_sas_port_add_rphy(pqi_sas_port, rphy);
	if (rc)
		goto free_sas_port;

	return 0;

free_sas_port:
	pqi_free_sas_port(pqi_sas_port);
	device->sas_port = NULL;

	return rc;
}

void pqi_remove_sas_device(struct pqi_scsi_dev *device)
{
	if (device->sas_port) {
		pqi_free_sas_port(device->sas_port);
		device->sas_port = NULL;
	}
}

static int pqi_sas_get_linkerrors(struct sas_phy *phy)
{
	return 0;
}

static int pqi_sas_get_enclosure_identifier(struct sas_rphy *rphy,
	u64 *identifier)
{
	return 0;
}

static int pqi_sas_get_bay_identifier(struct sas_rphy *rphy)
{
	return -ENXIO;
}

static int pqi_sas_phy_reset(struct sas_phy *phy, int hard_reset)
{
	return 0;
}

static int pqi_sas_phy_enable(struct sas_phy *phy, int enable)
{
	return 0;
}

static int pqi_sas_phy_setup(struct sas_phy *phy)
{
	return 0;
}

static void pqi_sas_phy_release(struct sas_phy *phy)
{
}

static int pqi_sas_phy_speed(struct sas_phy *phy,
	struct sas_phy_linkrates *rates)
{
	return -EINVAL;
}

/* SMP = Serial Management Protocol */

static int pqi_sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
	struct request *req)
{
	return -EINVAL;
}

struct sas_function_template pqi_sas_transport_functions = {
	.get_linkerrors = pqi_sas_get_linkerrors,
	.get_enclosure_identifier = pqi_sas_get_enclosure_identifier,
	.get_bay_identifier = pqi_sas_get_bay_identifier,
	.phy_reset = pqi_sas_phy_reset,
	.phy_enable = pqi_sas_phy_enable,
	.phy_setup = pqi_sas_phy_setup,
	.phy_release = pqi_sas_phy_release,
	.set_phy_speed = pqi_sas_phy_speed,
	.smp_handler = pqi_sas_smp_handler,
};