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
67int sas_init_events(struct sas_ha_struct *sas_ha);
68void sas_disable_revalidation(struct sas_ha_struct *ha);
69void sas_enable_revalidation(struct sas_ha_struct *ha);
70void __sas_drain_work(struct sas_ha_struct *ha);
71
72void sas_deform_port(struct asd_sas_phy *phy, int gone);
73
74void sas_porte_bytes_dmaed(struct work_struct *work);
75void sas_porte_broadcast_rcvd(struct work_struct *work);
76void sas_porte_link_reset_err(struct work_struct *work);
77void sas_porte_timer_event(struct work_struct *work);
78void sas_porte_hard_reset(struct work_struct *work);
79int sas_queue_work(struct sas_ha_struct *ha, struct sas_work *sw);
80
81int sas_notify_lldd_dev_found(struct domain_device *);
82void sas_notify_lldd_dev_gone(struct domain_device *);
83
84int sas_smp_phy_control(struct domain_device *dev, int phy_id,
85 enum phy_func phy_func, struct sas_phy_linkrates *);
86int sas_smp_get_phy_events(struct sas_phy *phy);
87
88int sas_notify_phy_event(struct asd_sas_phy *phy, enum phy_event event);
89void sas_device_set_phy(struct domain_device *dev, struct sas_port *port);
90struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy);
91struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id);
92int sas_ex_phy_discover(struct domain_device *dev, int single);
93int sas_get_report_phy_sata(struct domain_device *dev, int phy_id,
94 struct smp_resp *rps_resp);
95int sas_try_ata_reset(struct asd_sas_phy *phy);
96void sas_hae_reset(struct work_struct *work);
97
98void sas_free_device(struct kref *kref);
99
100#ifdef CONFIG_SCSI_SAS_HOST_SMP
101extern int sas_smp_host_handler(struct Scsi_Host *shost, struct request *req,
102 struct request *rsp);
103#else
104static inline int sas_smp_host_handler(struct Scsi_Host *shost,
105 struct request *req,
106 struct request *rsp)
107{
108 shost_printk(KERN_ERR, shost,
109 "Cannot send SMP to a sas host (not enabled in CONFIG)\n");
110 return -EINVAL;
111}
112#endif
113
114static inline void sas_fail_probe(struct domain_device *dev, const char *func, int err)
115{
116 SAS_DPRINTK("%s: for %s device %16llx returned %d\n",
117 func, dev->parent ? "exp-attached" :
118 "direct-attached",
119 SAS_ADDR(dev->sas_addr), err);
120 sas_unregister_dev(dev->port, dev);
121}
122
123static inline void sas_fill_in_rphy(struct domain_device *dev,
124 struct sas_rphy *rphy)
125{
126 rphy->identify.sas_address = SAS_ADDR(dev->sas_addr);
127 rphy->identify.initiator_port_protocols = dev->iproto;
128 rphy->identify.target_port_protocols = dev->tproto;
129 switch (dev->dev_type) {
130 case SAS_SATA_DEV:
131 /* FIXME: need sata device type */
132 case SAS_END_DEVICE:
133 case SAS_SATA_PENDING:
134 rphy->identify.device_type = SAS_END_DEVICE;
135 break;
136 case SAS_EDGE_EXPANDER_DEVICE:
137 rphy->identify.device_type = SAS_EDGE_EXPANDER_DEVICE;
138 break;
139 case SAS_FANOUT_EXPANDER_DEVICE:
140 rphy->identify.device_type = SAS_FANOUT_EXPANDER_DEVICE;
141 break;
142 default:
143 rphy->identify.device_type = SAS_PHY_UNUSED;
144 break;
145 }
146}
147
148static inline void sas_phy_set_target(struct asd_sas_phy *p, struct domain_device *dev)
149{
150 struct sas_phy *phy = p->phy;
151
152 if (dev) {
153 if (dev_is_sata(dev))
154 phy->identify.device_type = SAS_END_DEVICE;
155 else
156 phy->identify.device_type = dev->dev_type;
157 phy->identify.target_port_protocols = dev->tproto;
158 } else {
159 phy->identify.device_type = SAS_PHY_UNUSED;
160 phy->identify.target_port_protocols = 0;
161 }
162}
163
164static inline void sas_add_parent_port(struct domain_device *dev, int phy_id)
165{
166 struct expander_device *ex = &dev->ex_dev;
167 struct ex_phy *ex_phy = &ex->ex_phy[phy_id];
168
169 if (!ex->parent_port) {
170 ex->parent_port = sas_port_alloc(&dev->rphy->dev, phy_id);
171 /* FIXME: error handling */
172 BUG_ON(!ex->parent_port);
173 BUG_ON(sas_port_add(ex->parent_port));
174 sas_port_mark_backlink(ex->parent_port);
175 }
176 sas_port_add_phy(ex->parent_port, ex_phy->phy);
177}
178
179static inline struct domain_device *sas_alloc_device(void)
180{
181 struct domain_device *dev = kzalloc(sizeof(*dev), GFP_KERNEL);
182
183 if (dev) {
184 INIT_LIST_HEAD(&dev->siblings);
185 INIT_LIST_HEAD(&dev->dev_list_node);
186 INIT_LIST_HEAD(&dev->disco_list_node);
187 kref_init(&dev->kref);
188 spin_lock_init(&dev->done_lock);
189 }
190 return dev;
191}
192
193static inline void sas_put_device(struct domain_device *dev)
194{
195 kref_put(&dev->kref, sas_free_device);
196}
197
198#endif /* _SAS_INTERNAL_H_ */