summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/libsas/sas_internal.h
blob: a6dc7dc07fce3799d03cc74cbc1b06a926b28377 (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
/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Serial Attached SCSI (SAS) class internal header file
 *
 * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
 */

#ifndef _SAS_INTERNAL_H_
#define _SAS_INTERNAL_H_

#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport_sas.h>
#include <scsi/libsas.h>
#include <scsi/sas_ata.h>
#include <linux/pm_runtime.h>

#ifdef pr_fmt
#undef pr_fmt
#endif

#define SAS_FMT "sas: "

#define pr_fmt(fmt) SAS_FMT fmt

#define TO_SAS_TASK(_scsi_cmd)  ((void *)(_scsi_cmd)->host_scribble)
#define ASSIGN_SAS_TASK(_sc, _t) do { (_sc)->host_scribble = (void *) _t; } while (0)

struct sas_phy_data {
	/* let reset be performed in sas_queue_work() context */
	struct sas_phy *phy;
	struct mutex event_lock;
	int hard_reset;
	int reset_result;
	struct sas_work reset_work;
	int enable;
	int enable_result;
	struct sas_work enable_work;
};

void sas_scsi_recover_host(struct Scsi_Host *shost);

int  sas_register_phys(struct sas_ha_struct *sas_ha);

struct asd_sas_event *sas_alloc_event(struct asd_sas_phy *phy, gfp_t gfp_flags);
void sas_free_event(struct asd_sas_event *event);

struct sas_task *sas_alloc_task(gfp_t flags);
struct sas_task *sas_alloc_slow_task(gfp_t flags);
void sas_free_task(struct sas_task *task);

int  sas_register_ports(struct sas_ha_struct *sas_ha);
void sas_unregister_ports(struct sas_ha_struct *sas_ha);

void sas_disable_revalidation(struct sas_ha_struct *ha);
void sas_enable_revalidation(struct sas_ha_struct *ha);
void sas_queue_deferred_work(struct sas_ha_struct *ha);
void __sas_drain_work(struct sas_ha_struct *ha);

void sas_deform_port(struct asd_sas_phy *phy, int gone);

void sas_porte_bytes_dmaed(struct work_struct *work);
void sas_porte_broadcast_rcvd(struct work_struct *work);
void sas_porte_link_reset_err(struct work_struct *work);
void sas_porte_timer_event(struct work_struct *work);
void sas_porte_hard_reset(struct work_struct *work);
bool sas_queue_work(struct sas_ha_struct *ha, struct sas_work *sw);

int sas_notify_lldd_dev_found(struct domain_device *);
void sas_notify_lldd_dev_gone(struct domain_device *);

void sas_smp_handler(struct bsg_job *job, struct Scsi_Host *shost,
		struct sas_rphy *rphy);
int sas_smp_phy_control(struct domain_device *dev, int phy_id,
			enum phy_func phy_func, struct sas_phy_linkrates *);
int sas_smp_get_phy_events(struct sas_phy *phy);

void sas_device_set_phy(struct domain_device *dev, struct sas_port *port);
struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy);
struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id);
int sas_ex_phy_discover(struct domain_device *dev, int single);
int sas_get_report_phy_sata(struct domain_device *dev, int phy_id,
			    struct smp_rps_resp *rps_resp);
int sas_get_phy_attached_dev(struct domain_device *dev, int phy_id,
			     u8 *sas_addr, enum sas_device_type *type);
int sas_try_ata_reset(struct asd_sas_phy *phy);

void sas_free_device(struct kref *kref);
void sas_destruct_devices(struct asd_sas_port *port);

extern const work_func_t sas_phy_event_fns[PHY_NUM_EVENTS];
extern const work_func_t sas_port_event_fns[PORT_NUM_EVENTS];

void sas_task_internal_done(struct sas_task *task);
void sas_task_internal_timedout(struct timer_list *t);
int sas_execute_tmf(struct domain_device *device, void *parameter,
		    int para_len, int force_phy_id,
		    struct sas_tmf_task *tmf);

#ifdef CONFIG_SCSI_SAS_HOST_SMP
extern void sas_smp_host_handler(struct bsg_job *job, struct Scsi_Host *shost);
#else
static inline void sas_smp_host_handler(struct bsg_job *job,
		struct Scsi_Host *shost)
{
	shost_printk(KERN_ERR, shost,
		"Cannot send SMP to a sas host (not enabled in CONFIG)\n");
	bsg_job_done(job, -EINVAL, 0);
}
#endif

static inline bool sas_phy_match_dev_addr(struct domain_device *dev,
					 struct ex_phy *phy)
{
	return SAS_ADDR(dev->sas_addr) == SAS_ADDR(phy->attached_sas_addr);
}

static inline bool sas_phy_match_port_addr(struct asd_sas_port *port,
					   struct ex_phy *phy)
{
	return SAS_ADDR(port->sas_addr) == SAS_ADDR(phy->attached_sas_addr);
}

static inline bool sas_phy_addr_match(struct ex_phy *p1, struct ex_phy *p2)
{
	return  SAS_ADDR(p1->attached_sas_addr) == SAS_ADDR(p2->attached_sas_addr);
}

static inline void sas_fail_probe(struct domain_device *dev, const char *func, int err)
{
	pr_warn("%s: for %s device %016llx returned %d\n",
		func, dev->parent ? "exp-attached" :
		"direct-attached",
		SAS_ADDR(dev->sas_addr), err);
	sas_unregister_dev(dev->port, dev);
}

static inline void sas_fill_in_rphy(struct domain_device *dev,
				    struct sas_rphy *rphy)
{
	rphy->identify.sas_address = SAS_ADDR(dev->sas_addr);
	rphy->identify.initiator_port_protocols = dev->iproto;
	rphy->identify.target_port_protocols = dev->tproto;
	switch (dev->dev_type) {
	case SAS_SATA_DEV:
		/* FIXME: need sata device type */
	case SAS_END_DEVICE:
	case SAS_SATA_PENDING:
		rphy->identify.device_type = SAS_END_DEVICE;
		break;
	case SAS_EDGE_EXPANDER_DEVICE:
		rphy->identify.device_type = SAS_EDGE_EXPANDER_DEVICE;
		break;
	case SAS_FANOUT_EXPANDER_DEVICE:
		rphy->identify.device_type = SAS_FANOUT_EXPANDER_DEVICE;
		break;
	default:
		rphy->identify.device_type = SAS_PHY_UNUSED;
		break;
	}
}

static inline void sas_phy_set_target(struct asd_sas_phy *p, struct domain_device *dev)
{
	struct sas_phy *phy = p->phy;

	if (dev) {
		if (dev_is_sata(dev))
			phy->identify.device_type = SAS_END_DEVICE;
		else
			phy->identify.device_type = dev->dev_type;
		phy->identify.target_port_protocols = dev->tproto;
	} else {
		phy->identify.device_type = SAS_PHY_UNUSED;
		phy->identify.target_port_protocols = 0;
	}
}

static inline void sas_add_parent_port(struct domain_device *dev, int phy_id)
{
	struct expander_device *ex = &dev->ex_dev;
	struct ex_phy *ex_phy = &ex->ex_phy[phy_id];

	if (!ex->parent_port) {
		ex->parent_port = sas_port_alloc(&dev->rphy->dev, phy_id);
		/* FIXME: error handling */
		BUG_ON(!ex->parent_port);
		BUG_ON(sas_port_add(ex->parent_port));
		sas_port_mark_backlink(ex->parent_port);
	}
	sas_port_add_phy(ex->parent_port, ex_phy->phy);
}

static inline struct domain_device *sas_alloc_device(void)
{
	struct domain_device *dev = kzalloc(sizeof(*dev), GFP_KERNEL);

	if (dev) {
		INIT_LIST_HEAD(&dev->siblings);
		INIT_LIST_HEAD(&dev->dev_list_node);
		INIT_LIST_HEAD(&dev->disco_list_node);
		kref_init(&dev->kref);
		spin_lock_init(&dev->done_lock);
	}
	return dev;
}

static inline void sas_put_device(struct domain_device *dev)
{
	kref_put(&dev->kref, sas_free_device);
}

#endif /* _SAS_INTERNAL_H_ */