1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Serial Attached SCSI (SAS) class internal header file
4 *
5 * Copyright (C) 2005 Adaptec, Inc. All rights reserved.
6 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
7 */
8
9#ifndef _SAS_INTERNAL_H_
10#define _SAS_INTERNAL_H_
11
12#include <scsi/scsi.h>
13#include <scsi/scsi_host.h>
14#include <scsi/scsi_transport_sas.h>
15#include <scsi/libsas.h>
16#include <scsi/sas_ata.h>
17#include <linux/pm_runtime.h>
18
19#ifdef pr_fmt
20#undef pr_fmt
21#endif
22
23#define SAS_FMT "sas: "
24
25#define pr_fmt(fmt) SAS_FMT fmt
26
27#define TO_SAS_TASK(_scsi_cmd) ((void *)(_scsi_cmd)->host_scribble)
28#define ASSIGN_SAS_TASK(_sc, _t) do { (_sc)->host_scribble = (void *) _t; } while (0)
29
30struct sas_phy_data {
31 /* let reset be performed in sas_queue_work() context */
32 struct sas_phy *phy;
33 struct mutex event_lock;
34 int hard_reset;
35 int reset_result;
36 struct sas_work reset_work;
37 int enable;
38 int enable_result;
39 struct sas_work enable_work;
40};
41
42void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
43
44int sas_discover_root_expander(struct domain_device *dev);
45
46int sas_ex_revalidate_domain(struct domain_device *dev);
47void sas_unregister_domain_devices(struct asd_sas_port *port, int gone);
48void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *port);
49void sas_discover_event(struct asd_sas_port *port, enum discover_event ev);
50
51void sas_init_dev(struct domain_device *dev);
52void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *dev);
53
54void sas_scsi_recover_host(struct Scsi_Host *shost);
55
56int sas_register_phys(struct sas_ha_struct *sas_ha);
57
58struct asd_sas_event *sas_alloc_event(struct asd_sas_phy *phy, gfp_t gfp_flags);
59void sas_free_event(struct asd_sas_event *event);
60
61struct sas_task *sas_alloc_task(gfp_t flags);
62struct sas_task *sas_alloc_slow_task(gfp_t flags);
63void sas_free_task(struct sas_task *task);
64
65int sas_register_ports(struct sas_ha_struct *sas_ha);
66void sas_unregister_ports(struct sas_ha_struct *sas_ha);
67
68void sas_disable_revalidation(struct sas_ha_struct *ha);
69void sas_enable_revalidation(struct sas_ha_struct *ha);
70void sas_queue_deferred_work(struct sas_ha_struct *ha);
71void __sas_drain_work(struct sas_ha_struct *ha);
72
73void sas_deform_port(struct asd_sas_phy *phy, int gone);
74
75void sas_porte_bytes_dmaed(struct work_struct *work);
76void sas_porte_broadcast_rcvd(struct work_struct *work);
77void sas_porte_link_reset_err(struct work_struct *work);
78void sas_porte_timer_event(struct work_struct *work);
79void sas_porte_hard_reset(struct work_struct *work);
80bool sas_queue_work(struct sas_ha_struct *ha, struct sas_work *sw);
81
82int sas_notify_lldd_dev_found(struct domain_device *);
83void sas_notify_lldd_dev_gone(struct domain_device *);
84
85void sas_smp_handler(struct bsg_job *job, struct Scsi_Host *shost,
86 struct sas_rphy *rphy);
87int sas_smp_phy_control(struct domain_device *dev, int phy_id,
88 enum phy_func phy_func, struct sas_phy_linkrates *);
89int sas_smp_get_phy_events(struct sas_phy *phy);
90
91void sas_device_set_phy(struct domain_device *dev, struct sas_port *port);
92struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy);
93struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id);
94int sas_ex_phy_discover(struct domain_device *dev, int single);
95int sas_get_report_phy_sata(struct domain_device *dev, int phy_id,
96 struct smp_rps_resp *rps_resp);
97int sas_get_phy_attached_dev(struct domain_device *dev, int phy_id,
98 u8 *sas_addr, enum sas_device_type *type);
99int sas_try_ata_reset(struct asd_sas_phy *phy);
100
101void sas_free_device(struct kref *kref);
102void sas_destruct_devices(struct asd_sas_port *port);
103
104extern const work_func_t sas_phy_event_fns[PHY_NUM_EVENTS];
105extern const work_func_t sas_port_event_fns[PORT_NUM_EVENTS];
106
107void sas_task_internal_done(struct sas_task *task);
108void sas_task_internal_timedout(struct timer_list *t);
109int sas_execute_tmf(struct domain_device *device, void *parameter,
110 int para_len, int force_phy_id,
111 struct sas_tmf_task *tmf);
112
113#ifdef CONFIG_SCSI_SAS_HOST_SMP
114extern void sas_smp_host_handler(struct bsg_job *job, struct Scsi_Host *shost);
115#else
116static inline void sas_smp_host_handler(struct bsg_job *job,
117 struct Scsi_Host *shost)
118{
119 shost_printk(KERN_ERR, shost,
120 "Cannot send SMP to a sas host (not enabled in CONFIG)\n");
121 bsg_job_done(job, -EINVAL, 0);
122}
123#endif
124
125static inline bool sas_phy_match_dev_addr(struct domain_device *dev,
126 struct ex_phy *phy)
127{
128 return SAS_ADDR(dev->sas_addr) == SAS_ADDR(phy->attached_sas_addr);
129}
130
131static inline bool sas_phy_match_port_addr(struct asd_sas_port *port,
132 struct ex_phy *phy)
133{
134 return SAS_ADDR(port->sas_addr) == SAS_ADDR(phy->attached_sas_addr);
135}
136
137static inline bool sas_phy_addr_match(struct ex_phy *p1, struct ex_phy *p2)
138{
139 return SAS_ADDR(p1->attached_sas_addr) == SAS_ADDR(p2->attached_sas_addr);
140}
141
142static inline void sas_fail_probe(struct domain_device *dev, const char *func, int err)
143{
144 pr_warn("%s: for %s device %016llx returned %d\n",
145 func, dev->parent ? "exp-attached" :
146 "direct-attached",
147 SAS_ADDR(dev->sas_addr), err);
148 sas_unregister_dev(port: dev->port, dev);
149}
150
151static inline void sas_fill_in_rphy(struct domain_device *dev,
152 struct sas_rphy *rphy)
153{
154 rphy->identify.sas_address = SAS_ADDR(dev->sas_addr);
155 rphy->identify.initiator_port_protocols = dev->iproto;
156 rphy->identify.target_port_protocols = dev->tproto;
157 switch (dev->dev_type) {
158 case SAS_SATA_DEV:
159 /* FIXME: need sata device type */
160 case SAS_END_DEVICE:
161 case SAS_SATA_PENDING:
162 rphy->identify.device_type = SAS_END_DEVICE;
163 break;
164 case SAS_EDGE_EXPANDER_DEVICE:
165 rphy->identify.device_type = SAS_EDGE_EXPANDER_DEVICE;
166 break;
167 case SAS_FANOUT_EXPANDER_DEVICE:
168 rphy->identify.device_type = SAS_FANOUT_EXPANDER_DEVICE;
169 break;
170 default:
171 rphy->identify.device_type = SAS_PHY_UNUSED;
172 break;
173 }
174}
175
176static inline void sas_phy_set_target(struct asd_sas_phy *p, struct domain_device *dev)
177{
178 struct sas_phy *phy = p->phy;
179
180 if (dev) {
181 if (dev_is_sata(dev))
182 phy->identify.device_type = SAS_END_DEVICE;
183 else
184 phy->identify.device_type = dev->dev_type;
185 phy->identify.target_port_protocols = dev->tproto;
186 } else {
187 phy->identify.device_type = SAS_PHY_UNUSED;
188 phy->identify.target_port_protocols = 0;
189 }
190}
191
192static inline void sas_add_parent_port(struct domain_device *dev, int phy_id)
193{
194 struct expander_device *ex = &dev->ex_dev;
195 struct ex_phy *ex_phy = &ex->ex_phy[phy_id];
196
197 if (!ex->parent_port) {
198 ex->parent_port = sas_port_alloc(&dev->rphy->dev, phy_id);
199 /* FIXME: error handling */
200 BUG_ON(!ex->parent_port);
201 BUG_ON(sas_port_add(ex->parent_port));
202 sas_port_mark_backlink(ex->parent_port);
203 }
204 sas_port_add_phy(ex->parent_port, ex_phy->phy);
205}
206
207static inline struct domain_device *sas_alloc_device(void)
208{
209 struct domain_device *dev = kzalloc(size: sizeof(*dev), GFP_KERNEL);
210
211 if (dev) {
212 INIT_LIST_HEAD(list: &dev->siblings);
213 INIT_LIST_HEAD(list: &dev->dev_list_node);
214 INIT_LIST_HEAD(list: &dev->disco_list_node);
215 kref_init(kref: &dev->kref);
216 spin_lock_init(&dev->done_lock);
217 }
218 return dev;
219}
220
221static inline void sas_put_device(struct domain_device *dev)
222{
223 kref_put(kref: &dev->kref, release: sas_free_device);
224}
225
226#endif /* _SAS_INTERNAL_H_ */
227

source code of linux/drivers/scsi/libsas/sas_internal.h