tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Serial Attached SCSI (SAS) class internal header file
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
22 * USA
23 *
24 */
25
26#ifndef _SAS_INTERNAL_H_
27#define _SAS_INTERNAL_H_
28
29#include <scsi/scsi.h>
30#include <scsi/scsi_host.h>
31#include <scsi/scsi_transport_sas.h>
32#include <scsi/libsas.h>
33#include <scsi/sas_ata.h>
34
35#define sas_printk(fmt, ...) printk(KERN_NOTICE "sas: " fmt, ## __VA_ARGS__)
36
37#define SAS_DPRINTK(fmt, ...) printk(KERN_DEBUG "sas: " fmt, ## __VA_ARGS__)
38
39#define TO_SAS_TASK(_scsi_cmd) ((void *)(_scsi_cmd)->host_scribble)
40#define ASSIGN_SAS_TASK(_sc, _t) do { (_sc)->host_scribble = (void *) _t; } while (0)
41
42struct sas_phy_data {
43 /* let reset be performed in sas_queue_work() context */
44 struct sas_phy *phy;
45 struct mutex event_lock;
46 int hard_reset;
47 int reset_result;
48 struct sas_work reset_work;
49 int enable;
50 int enable_result;
51 struct sas_work enable_work;
52};
53
54void sas_scsi_recover_host(struct Scsi_Host *shost);
55
56int sas_show_class(enum sas_class class, char *buf);
57int sas_show_proto(enum sas_protocol proto, char *buf);
58int sas_show_linkrate(enum sas_linkrate linkrate, char *buf);
59int sas_show_oob_mode(enum sas_oob_mode oob_mode, char *buf);
60
61int sas_register_phys(struct sas_ha_struct *sas_ha);
62void sas_unregister_phys(struct sas_ha_struct *sas_ha);
63
64int sas_register_ports(struct sas_ha_struct *sas_ha);
65void sas_unregister_ports(struct sas_ha_struct *sas_ha);
66
67enum blk_eh_timer_return sas_scsi_timed_out(struct scsi_cmnd *);
68
69int sas_init_queue(struct sas_ha_struct *sas_ha);
70int sas_init_events(struct sas_ha_struct *sas_ha);
71void sas_shutdown_queue(struct sas_ha_struct *sas_ha);
72void sas_disable_revalidation(struct sas_ha_struct *ha);
73void sas_enable_revalidation(struct sas_ha_struct *ha);
74void __sas_drain_work(struct sas_ha_struct *ha);
75
76void sas_deform_port(struct asd_sas_phy *phy, int gone);
77
78void sas_porte_bytes_dmaed(struct work_struct *work);
79void sas_porte_broadcast_rcvd(struct work_struct *work);
80void sas_porte_link_reset_err(struct work_struct *work);
81void sas_porte_timer_event(struct work_struct *work);
82void sas_porte_hard_reset(struct work_struct *work);
83void sas_queue_work(struct sas_ha_struct *ha, struct sas_work *sw);
84
85int sas_notify_lldd_dev_found(struct domain_device *);
86void sas_notify_lldd_dev_gone(struct domain_device *);
87
88int sas_smp_phy_control(struct domain_device *dev, int phy_id,
89 enum phy_func phy_func, struct sas_phy_linkrates *);
90int sas_smp_get_phy_events(struct sas_phy *phy);
91
92void sas_device_set_phy(struct domain_device *dev, struct sas_port *port);
93struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy);
94struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id);
95int sas_ex_phy_discover(struct domain_device *dev, int single);
96int sas_get_report_phy_sata(struct domain_device *dev, int phy_id,
97 struct smp_resp *rps_resp);
98int sas_try_ata_reset(struct asd_sas_phy *phy);
99void sas_hae_reset(struct work_struct *work);
100
101void sas_free_device(struct kref *kref);
102
103#ifdef CONFIG_SCSI_SAS_HOST_SMP
104extern int sas_smp_host_handler(struct Scsi_Host *shost, struct request *req,
105 struct request *rsp);
106#else
107static inline int sas_smp_host_handler(struct Scsi_Host *shost,
108 struct request *req,
109 struct request *rsp)
110{
111 shost_printk(KERN_ERR, shost,
112 "Cannot send SMP to a sas host (not enabled in CONFIG)\n");
113 return -EINVAL;
114}
115#endif
116
117static inline void sas_fail_probe(struct domain_device *dev, const char *func, int err)
118{
119 SAS_DPRINTK("%s: for %s device %16llx returned %d\n",
120 func, dev->parent ? "exp-attached" :
121 "direct-attached",
122 SAS_ADDR(dev->sas_addr), err);
123 sas_unregister_dev(dev->port, dev);
124}
125
126static inline void sas_fill_in_rphy(struct domain_device *dev,
127 struct sas_rphy *rphy)
128{
129 rphy->identify.sas_address = SAS_ADDR(dev->sas_addr);
130 rphy->identify.initiator_port_protocols = dev->iproto;
131 rphy->identify.target_port_protocols = dev->tproto;
132 switch (dev->dev_type) {
133 case SATA_DEV:
134 /* FIXME: need sata device type */
135 case SAS_END_DEV:
136 case SATA_PENDING:
137 rphy->identify.device_type = SAS_END_DEVICE;
138 break;
139 case EDGE_DEV:
140 rphy->identify.device_type = SAS_EDGE_EXPANDER_DEVICE;
141 break;
142 case FANOUT_DEV:
143 rphy->identify.device_type = SAS_FANOUT_EXPANDER_DEVICE;
144 break;
145 default:
146 rphy->identify.device_type = SAS_PHY_UNUSED;
147 break;
148 }
149}
150
151static inline void sas_phy_set_target(struct asd_sas_phy *p, struct domain_device *dev)
152{
153 struct sas_phy *phy = p->phy;
154
155 if (dev) {
156 if (dev_is_sata(dev))
157 phy->identify.device_type = SAS_END_DEVICE;
158 else
159 phy->identify.device_type = dev->dev_type;
160 phy->identify.target_port_protocols = dev->tproto;
161 } else {
162 phy->identify.device_type = SAS_PHY_UNUSED;
163 phy->identify.target_port_protocols = 0;
164 }
165}
166
167static inline void sas_add_parent_port(struct domain_device *dev, int phy_id)
168{
169 struct expander_device *ex = &dev->ex_dev;
170 struct ex_phy *ex_phy = &ex->ex_phy[phy_id];
171
172 if (!ex->parent_port) {
173 ex->parent_port = sas_port_alloc(&dev->rphy->dev, phy_id);
174 /* FIXME: error handling */
175 BUG_ON(!ex->parent_port);
176 BUG_ON(sas_port_add(ex->parent_port));
177 sas_port_mark_backlink(ex->parent_port);
178 }
179 sas_port_add_phy(ex->parent_port, ex_phy->phy);
180}
181
182static inline struct domain_device *sas_alloc_device(void)
183{
184 struct domain_device *dev = kzalloc(sizeof(*dev), GFP_KERNEL);
185
186 if (dev) {
187 INIT_LIST_HEAD(&dev->siblings);
188 INIT_LIST_HEAD(&dev->dev_list_node);
189 INIT_LIST_HEAD(&dev->disco_list_node);
190 kref_init(&dev->kref);
191 spin_lock_init(&dev->done_lock);
192 }
193 return dev;
194}
195
196static inline void sas_put_device(struct domain_device *dev)
197{
198 kref_put(&dev->kref, sas_free_device);
199}
200
201#endif /* _SAS_INTERNAL_H_ */