[mirror_ubuntu-bionic-kernel.git] / drivers / scsi / smartpqi / smartpqi_sas_transport.c

/*
 *    driver for Microsemi PQI-based storage controllers
 *    Copyright (c) 2016-2017 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,
};
Commit	Line	Data
6c223761 KB	1	/*
6c223761 KB	2	* driver for Microsemi PQI-based storage controllers
b805dbfe	3	* Copyright (c) 2016-2017 Microsemi Corporation
6c223761 KB	4	* Copyright (c) 2016 PMC-Sierra, Inc.
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; version 2 of the License.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
	13	* NON INFRINGEMENT. See the GNU General Public License for more details.
	14	*
	15	* Questions/Comments/Bugfixes to esc.storagedev@microsemi.com
	16	*
	17	*/
	18
	19	#include <linux/kernel.h>
	20	#include <scsi/scsi_host.h>
	21	#include <scsi/scsi_cmnd.h>
	22	#include <scsi/scsi_transport_sas.h>
	23	#include "smartpqi.h"
	24
	25	static struct pqi_sas_phy pqi_alloc_sas_phy(struct pqi_sas_port pqi_sas_port)
	26	{
	27	struct pqi_sas_phy *pqi_sas_phy;
	28	struct sas_phy *phy;
	29
	30	pqi_sas_phy = kzalloc(sizeof(*pqi_sas_phy), GFP_KERNEL);
	31	if (!pqi_sas_phy)
	32	return NULL;
	33
	34	phy = sas_phy_alloc(pqi_sas_port->parent_node->parent_dev,
	35	pqi_sas_port->next_phy_index);
	36	if (!phy) {
	37	kfree(pqi_sas_phy);
	38	return NULL;
	39	}
	40
	41	pqi_sas_port->next_phy_index++;
	42	pqi_sas_phy->phy = phy;
	43	pqi_sas_phy->parent_port = pqi_sas_port;
	44
	45	return pqi_sas_phy;
	46	}
	47
	48	static void pqi_free_sas_phy(struct pqi_sas_phy *pqi_sas_phy)
	49	{
	50	struct sas_phy *phy = pqi_sas_phy->phy;
	51
	52	sas_port_delete_phy(pqi_sas_phy->parent_port->port, phy);
	53	sas_phy_free(phy);
	54	if (pqi_sas_phy->added_to_port)
	55	list_del(&pqi_sas_phy->phy_list_entry);
	56	kfree(pqi_sas_phy);
	57	}
	58
	59	static int pqi_sas_port_add_phy(struct pqi_sas_phy *pqi_sas_phy)
	60	{
	61	int rc;
	62	struct pqi_sas_port *pqi_sas_port;
	63	struct sas_phy *phy;
	64	struct sas_identify *identify;
	65
	66	pqi_sas_port = pqi_sas_phy->parent_port;
	67	phy = pqi_sas_phy->phy;
68
69	identify = &phy->identify;
70	memset(identify, 0, sizeof(*identify));
71	identify->sas_address = pqi_sas_port->sas_address;
72	identify->device_type = SAS_END_DEVICE;
73	identify->initiator_port_protocols = SAS_PROTOCOL_STP;
74	identify->target_port_protocols = SAS_PROTOCOL_STP;
75	phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
76	phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
77	phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN;
78	phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN;
79	phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
80
81	rc = sas_phy_add(pqi_sas_phy->phy);
82	if (rc)
83	return rc;
84
85	sas_port_add_phy(pqi_sas_port->port, pqi_sas_phy->phy);
86	list_add_tail(&pqi_sas_phy->phy_list_entry,
87	&pqi_sas_port->phy_list_head);
88	pqi_sas_phy->added_to_port = true;
89
90	return 0;
91	}
92
93	static int pqi_sas_port_add_rphy(struct pqi_sas_port *pqi_sas_port,
94	struct sas_rphy *rphy)
95	{
96	struct sas_identify *identify;
97
98	identify = &rphy->identify;
99	identify->sas_address = pqi_sas_port->sas_address;
100	identify->initiator_port_protocols = SAS_PROTOCOL_STP;
101	identify->target_port_protocols = SAS_PROTOCOL_STP;
102
103	return sas_rphy_add(rphy);
104	}
105
106	static struct pqi_sas_port *pqi_alloc_sas_port(
107	struct pqi_sas_node *pqi_sas_node, u64 sas_address)
108	{
109	int rc;
110	struct pqi_sas_port *pqi_sas_port;
111	struct sas_port *port;
112
113	pqi_sas_port = kzalloc(sizeof(*pqi_sas_port), GFP_KERNEL);
114	if (!pqi_sas_port)
115	return NULL;
116
117	INIT_LIST_HEAD(&pqi_sas_port->phy_list_head);
118	pqi_sas_port->parent_node = pqi_sas_node;
119
120	port = sas_port_alloc_num(pqi_sas_node->parent_dev);
121	if (!port)
122	goto free_pqi_port;
123
124	rc = sas_port_add(port);
125	if (rc)
126	goto free_sas_port;
127
128	pqi_sas_port->port = port;
129	pqi_sas_port->sas_address = sas_address;
130	list_add_tail(&pqi_sas_port->port_list_entry,
131	&pqi_sas_node->port_list_head);
132
133	return pqi_sas_port;
134
135	free_sas_port:
136	sas_port_free(port);
137	free_pqi_port:
138	kfree(pqi_sas_port);
139
140	return NULL;
141	}
142
143	static void pqi_free_sas_port(struct pqi_sas_port *pqi_sas_port)
144	{
145	struct pqi_sas_phy *pqi_sas_phy;
146	struct pqi_sas_phy *next;
147
148	list_for_each_entry_safe(pqi_sas_phy, next,
149	&pqi_sas_port->phy_list_head, phy_list_entry)
150	pqi_free_sas_phy(pqi_sas_phy);
151
152	sas_port_delete(pqi_sas_port->port);
153	list_del(&pqi_sas_port->port_list_entry);
154	kfree(pqi_sas_port);
155	}
156
157	static struct pqi_sas_node pqi_alloc_sas_node(struct device parent_dev)
158	{
159	struct pqi_sas_node *pqi_sas_node;
160
161	pqi_sas_node = kzalloc(sizeof(*pqi_sas_node), GFP_KERNEL);
162	if (pqi_sas_node) {
163	pqi_sas_node->parent_dev = parent_dev;
164	INIT_LIST_HEAD(&pqi_sas_node->port_list_head);
165	}
166
167	return pqi_sas_node;
168	}
169
170	static void pqi_free_sas_node(struct pqi_sas_node *pqi_sas_node)
171	{
172	struct pqi_sas_port *pqi_sas_port;
173	struct pqi_sas_port *next;
174
175	if (!pqi_sas_node)
176	return;
177
178	list_for_each_entry_safe(pqi_sas_port, next,
179	&pqi_sas_node->port_list_head, port_list_entry)
180	pqi_free_sas_port(pqi_sas_port);
181
182	kfree(pqi_sas_node);
183	}
184
185	struct pqi_scsi_dev *pqi_find_device_by_sas_rphy(
186	struct pqi_ctrl_info ctrl_info, struct sas_rphy rphy)
187	{
188	struct pqi_scsi_dev *device;
189
190	list_for_each_entry(device, &ctrl_info->scsi_device_list,
191	scsi_device_list_entry) {
192	if (!device->sas_port)
193	continue;
194	if (device->sas_port->rphy == rphy)
195	return device;
196	}
197
198	return NULL;
199	}
200
201	int pqi_add_sas_host(struct Scsi_Host shost, struct pqi_ctrl_info ctrl_info)
202	{
203	int rc;
204	struct device *parent_dev;
205	struct pqi_sas_node *pqi_sas_node;
206	struct pqi_sas_port *pqi_sas_port;
207	struct pqi_sas_phy *pqi_sas_phy;
208
209	parent_dev = &shost->shost_gendev;
210
211	pqi_sas_node = pqi_alloc_sas_node(parent_dev);
212	if (!pqi_sas_node)
213	return -ENOMEM;
214
215	pqi_sas_port = pqi_alloc_sas_port(pqi_sas_node, ctrl_info->sas_address);
216	if (!pqi_sas_port) {
217	rc = -ENODEV;
218	goto free_sas_node;
219	}
220
221	pqi_sas_phy = pqi_alloc_sas_phy(pqi_sas_port);
222	if (!pqi_sas_phy) {
223	rc = -ENODEV;
224	goto free_sas_port;
225	}
226
227	rc = pqi_sas_port_add_phy(pqi_sas_phy);
228	if (rc)
229	goto free_sas_phy;
230
231	ctrl_info->sas_host = pqi_sas_node;
232
233	return 0;
234
235	free_sas_phy:
236	pqi_free_sas_phy(pqi_sas_phy);
237	free_sas_port:
238	pqi_free_sas_port(pqi_sas_port);
239	free_sas_node:
240	pqi_free_sas_node(pqi_sas_node);
241
242	return rc;
243	}
244
245	void pqi_delete_sas_host(struct pqi_ctrl_info *ctrl_info)
246	{
247	pqi_free_sas_node(ctrl_info->sas_host);
248	}
249
250	int pqi_add_sas_device(struct pqi_sas_node *pqi_sas_node,
251	struct pqi_scsi_dev *device)
252	{
253	int rc;
254	struct pqi_sas_port *pqi_sas_port;
255	struct sas_rphy *rphy;
256
257	pqi_sas_port = pqi_alloc_sas_port(pqi_sas_node, device->sas_address);
258	if (!pqi_sas_port)
259	return -ENOMEM;
260
261	rphy = sas_end_device_alloc(pqi_sas_port->port);
262	if (!rphy) {
263	rc = -ENODEV;
264	goto free_sas_port;
265	}
266
267	pqi_sas_port->rphy = rphy;
268	device->sas_port = pqi_sas_port;
269
270	rc = pqi_sas_port_add_rphy(pqi_sas_port, rphy);
271	if (rc)
272	goto free_sas_port;
273
274	return 0;
275
276	free_sas_port:
277	pqi_free_sas_port(pqi_sas_port);
278	device->sas_port = NULL;
279
280	return rc;
281	}
282
283	void pqi_remove_sas_device(struct pqi_scsi_dev *device)
284	{
285	if (device->sas_port) {
286	pqi_free_sas_port(device->sas_port);
287	device->sas_port = NULL;
288	}
289	}
290
291	static int pqi_sas_get_linkerrors(struct sas_phy *phy)
292	{
293	return 0;
294	}
295
296	static int pqi_sas_get_enclosure_identifier(struct sas_rphy *rphy,
297	u64 *identifier)
298	{
299	return 0;
300	}
301
302	static int pqi_sas_get_bay_identifier(struct sas_rphy *rphy)
303	{
304	return -ENXIO;
305	}
306
307	static int pqi_sas_phy_reset(struct sas_phy *phy, int hard_reset)
308	{
309	return 0;
310	}
311
312	static int pqi_sas_phy_enable(struct sas_phy *phy, int enable)
313	{
314	return 0;
315	}
316
317	static int pqi_sas_phy_setup(struct sas_phy *phy)
318	{
319	return 0;
320	}
321
322	static void pqi_sas_phy_release(struct sas_phy *phy)
323	{
324	}
325
326	static int pqi_sas_phy_speed(struct sas_phy *phy,
327	struct sas_phy_linkrates *rates)
328	{
329	return -EINVAL;
330	}
331
332	/* SMP = Serial Management Protocol */
333
334	static int pqi_sas_smp_handler(struct Scsi_Host shost, struct sas_rphy rphy,
335	struct request *req)
336	{
337	return -EINVAL;
338	}
339
340	struct sas_function_template pqi_sas_transport_functions = {
341	.get_linkerrors = pqi_sas_get_linkerrors,
342	.get_enclosure_identifier = pqi_sas_get_enclosure_identifier,
343	.get_bay_identifier = pqi_sas_get_bay_identifier,
344	.phy_reset = pqi_sas_phy_reset,
345	.phy_enable = pqi_sas_phy_enable,
346	.phy_setup = pqi_sas_phy_setup,
347	.phy_release = pqi_sas_phy_release,
348	.set_phy_speed = pqi_sas_phy_speed,
349	.smp_handler = pqi_sas_smp_handler,
350	};