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 
30 struct 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 
42 void sas_scsi_recover_host(struct Scsi_Host *shost);
43 
44 int sas_show_class(enum sas_class class, char *buf);
45 int sas_show_proto(enum sas_protocol proto, char *buf);
46 int sas_show_linkrate(enum sas_linkrate linkrate, char *buf);
47 int sas_show_oob_mode(enum sas_oob_mode oob_mode, char *buf);
48 
49 int  sas_register_phys(struct sas_ha_struct *sas_ha);
50 void sas_unregister_phys(struct sas_ha_struct *sas_ha);
51 
52 struct asd_sas_event *sas_alloc_event(struct asd_sas_phy *phy, gfp_t gfp_flags);
53 void sas_free_event(struct asd_sas_event *event);
54 
55 int  sas_register_ports(struct sas_ha_struct *sas_ha);
56 void sas_unregister_ports(struct sas_ha_struct *sas_ha);
57 
58 void sas_disable_revalidation(struct sas_ha_struct *ha);
59 void sas_enable_revalidation(struct sas_ha_struct *ha);
60 void sas_queue_deferred_work(struct sas_ha_struct *ha);
61 void __sas_drain_work(struct sas_ha_struct *ha);
62 
63 void sas_deform_port(struct asd_sas_phy *phy, int gone);
64 
65 void sas_porte_bytes_dmaed(struct work_struct *work);
66 void sas_porte_broadcast_rcvd(struct work_struct *work);
67 void sas_porte_link_reset_err(struct work_struct *work);
68 void sas_porte_timer_event(struct work_struct *work);
69 void sas_porte_hard_reset(struct work_struct *work);
70 bool sas_queue_work(struct sas_ha_struct *ha, struct sas_work *sw);
71 
72 int sas_notify_lldd_dev_found(struct domain_device *);
73 void sas_notify_lldd_dev_gone(struct domain_device *);
74 
75 void sas_smp_handler(struct bsg_job *job, struct Scsi_Host *shost,
76 		struct sas_rphy *rphy);
77 int sas_smp_phy_control(struct domain_device *dev, int phy_id,
78 			enum phy_func phy_func, struct sas_phy_linkrates *);
79 int sas_smp_get_phy_events(struct sas_phy *phy);
80 
81 void sas_device_set_phy(struct domain_device *dev, struct sas_port *port);
82 struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy);
83 struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id);
84 int sas_ex_phy_discover(struct domain_device *dev, int single);
85 int sas_get_report_phy_sata(struct domain_device *dev, int phy_id,
86 			    struct smp_rps_resp *rps_resp);
87 int sas_try_ata_reset(struct asd_sas_phy *phy);
88 void sas_hae_reset(struct work_struct *work);
89 
90 void sas_free_device(struct kref *kref);
91 void sas_destruct_devices(struct asd_sas_port *port);
92 
93 extern const work_func_t sas_phy_event_fns[PHY_NUM_EVENTS];
94 extern const work_func_t sas_port_event_fns[PORT_NUM_EVENTS];
95 
96 void sas_task_internal_done(struct sas_task *task);
97 void sas_task_internal_timedout(struct timer_list *t);
98 int sas_execute_tmf(struct domain_device *device, void *parameter,
99 		    int para_len, int force_phy_id,
100 		    struct sas_tmf_task *tmf);
101 
102 #ifdef CONFIG_SCSI_SAS_HOST_SMP
103 extern void sas_smp_host_handler(struct bsg_job *job, struct Scsi_Host *shost);
104 #else
105 static inline void sas_smp_host_handler(struct bsg_job *job,
106 		struct Scsi_Host *shost)
107 {
108 	shost_printk(KERN_ERR, shost,
109 		"Cannot send SMP to a sas host (not enabled in CONFIG)\n");
110 	bsg_job_done(job, -EINVAL, 0);
111 }
112 #endif
113 
114 static inline void sas_fail_probe(struct domain_device *dev, const char *func, int err)
115 {
116 	pr_warn("%s: for %s device %016llx 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 
123 static 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 
148 static 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 
164 static 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 
179 static 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 
193 static 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_ */
199