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_hash_addr(u8 *hashed, const u8 *sas_addr); 43 44 int sas_discover_root_expander(struct domain_device *dev); 45 46 int sas_ex_revalidate_domain(struct domain_device *dev); 47 void sas_unregister_domain_devices(struct asd_sas_port *port, bool gone); 48 void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *port); 49 void sas_discover_event(struct asd_sas_port *port, enum discover_event ev); 50 51 void sas_init_dev(struct domain_device *dev); 52 void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *dev); 53 54 void sas_scsi_recover_host(struct Scsi_Host *shost); 55 56 int sas_register_phys(struct sas_ha_struct *sas_ha); 57 void sas_unregister_phys(struct sas_ha_struct *sas_ha); 58 59 struct asd_sas_event *sas_alloc_event(struct asd_sas_phy *phy, gfp_t gfp_flags); 60 void sas_free_event(struct asd_sas_event *event); 61 62 struct sas_task *sas_alloc_task(gfp_t flags); 63 struct sas_task *sas_alloc_slow_task(gfp_t flags); 64 void sas_free_task(struct sas_task *task); 65 66 int sas_register_ports(struct sas_ha_struct *sas_ha); 67 void sas_unregister_ports(struct sas_ha_struct *sas_ha); 68 69 void sas_disable_revalidation(struct sas_ha_struct *ha); 70 void sas_enable_revalidation(struct sas_ha_struct *ha); 71 void sas_queue_deferred_work(struct sas_ha_struct *ha); 72 void __sas_drain_work(struct sas_ha_struct *ha); 73 74 void sas_deform_port(struct asd_sas_phy *phy, bool gone); 75 76 void sas_porte_bytes_dmaed(struct work_struct *work); 77 void sas_porte_broadcast_rcvd(struct work_struct *work); 78 void sas_porte_link_reset_err(struct work_struct *work); 79 void sas_porte_timer_event(struct work_struct *work); 80 void sas_porte_hard_reset(struct work_struct *work); 81 bool sas_queue_work(struct sas_ha_struct *ha, struct sas_work *sw); 82 83 int sas_notify_lldd_dev_found(struct domain_device *); 84 void sas_notify_lldd_dev_gone(struct domain_device *); 85 86 void sas_smp_handler(struct bsg_job *job, struct Scsi_Host *shost, 87 struct sas_rphy *rphy); 88 int sas_smp_phy_control(struct domain_device *dev, int phy_id, 89 enum phy_func phy_func, struct sas_phy_linkrates *); 90 int sas_smp_get_phy_events(struct sas_phy *phy); 91 92 void sas_device_set_phy(struct domain_device *dev, struct sas_port *port); 93 struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy); 94 struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id); 95 int sas_ex_phy_discover(struct domain_device *dev, int single); 96 int sas_get_report_phy_sata(struct domain_device *dev, int phy_id, 97 struct smp_rps_resp *rps_resp); 98 int sas_get_phy_attached_dev(struct domain_device *dev, int phy_id, 99 u8 *sas_addr, enum sas_device_type *type); 100 int sas_try_ata_reset(struct asd_sas_phy *phy); 101 102 void sas_free_device(struct kref *kref); 103 void sas_destruct_devices(struct asd_sas_port *port); 104 105 extern const work_func_t sas_phy_event_fns[PHY_NUM_EVENTS]; 106 extern const work_func_t sas_port_event_fns[PORT_NUM_EVENTS]; 107 108 void sas_task_internal_done(struct sas_task *task); 109 void sas_task_internal_timedout(struct timer_list *t); 110 int sas_execute_tmf(struct domain_device *device, void *parameter, 111 int para_len, int force_phy_id, 112 struct sas_tmf_task *tmf); 113 114 #ifdef CONFIG_SCSI_SAS_HOST_SMP 115 extern void sas_smp_host_handler(struct bsg_job *job, struct Scsi_Host *shost); 116 #else 117 static inline void sas_smp_host_handler(struct bsg_job *job, 118 struct Scsi_Host *shost) 119 { 120 shost_printk(KERN_ERR, shost, 121 "Cannot send SMP to a sas host (not enabled in CONFIG)\n"); 122 bsg_job_done(job, -EINVAL, 0); 123 } 124 #endif 125 126 static inline bool sas_phy_match_dev_addr(struct domain_device *dev, 127 struct ex_phy *phy) 128 { 129 return SAS_ADDR(dev->sas_addr) == SAS_ADDR(phy->attached_sas_addr); 130 } 131 132 static inline bool sas_phy_match_port_addr(struct asd_sas_port *port, 133 struct ex_phy *phy) 134 { 135 return SAS_ADDR(port->sas_addr) == SAS_ADDR(phy->attached_sas_addr); 136 } 137 138 static inline bool sas_phy_addr_match(struct ex_phy *p1, struct ex_phy *p2) 139 { 140 return SAS_ADDR(p1->attached_sas_addr) == SAS_ADDR(p2->attached_sas_addr); 141 } 142 143 static inline void sas_fail_probe(struct domain_device *dev, const char *func, int err) 144 { 145 pr_warn("%s: for %s device %016llx returned %d\n", 146 func, dev->parent ? "exp-attached" : 147 "direct-attached", 148 SAS_ADDR(dev->sas_addr), err); 149 sas_unregister_dev(dev->port, dev); 150 } 151 152 static inline void sas_fill_in_rphy(struct domain_device *dev, 153 struct sas_rphy *rphy) 154 { 155 rphy->identify.sas_address = SAS_ADDR(dev->sas_addr); 156 rphy->identify.initiator_port_protocols = dev->iproto; 157 rphy->identify.target_port_protocols = dev->tproto; 158 switch (dev->dev_type) { 159 case SAS_SATA_DEV: 160 /* FIXME: need sata device type */ 161 case SAS_END_DEVICE: 162 case SAS_SATA_PENDING: 163 rphy->identify.device_type = SAS_END_DEVICE; 164 break; 165 case SAS_EDGE_EXPANDER_DEVICE: 166 rphy->identify.device_type = SAS_EDGE_EXPANDER_DEVICE; 167 break; 168 case SAS_FANOUT_EXPANDER_DEVICE: 169 rphy->identify.device_type = SAS_FANOUT_EXPANDER_DEVICE; 170 break; 171 default: 172 rphy->identify.device_type = SAS_PHY_UNUSED; 173 break; 174 } 175 } 176 177 static inline void sas_phy_set_target(struct asd_sas_phy *p, struct domain_device *dev) 178 { 179 struct sas_phy *phy = p->phy; 180 181 if (dev) { 182 if (dev_is_sata(dev)) 183 phy->identify.device_type = SAS_END_DEVICE; 184 else 185 phy->identify.device_type = dev->dev_type; 186 phy->identify.target_port_protocols = dev->tproto; 187 } else { 188 phy->identify.device_type = SAS_PHY_UNUSED; 189 phy->identify.target_port_protocols = 0; 190 } 191 } 192 193 static inline struct domain_device *sas_alloc_device(void) 194 { 195 struct domain_device *dev = kzalloc(sizeof(*dev), GFP_KERNEL); 196 197 if (dev) { 198 INIT_LIST_HEAD(&dev->siblings); 199 INIT_LIST_HEAD(&dev->dev_list_node); 200 INIT_LIST_HEAD(&dev->disco_list_node); 201 kref_init(&dev->kref); 202 spin_lock_init(&dev->done_lock); 203 } 204 return dev; 205 } 206 207 static inline void sas_put_device(struct domain_device *dev) 208 { 209 kref_put(&dev->kref, sas_free_device); 210 } 211 212 #ifdef CONFIG_SCSI_SAS_ATA 213 214 int sas_ata_init(struct domain_device *dev); 215 void sas_ata_task_abort(struct sas_task *task); 216 int sas_discover_sata(struct domain_device *dev); 217 int sas_ata_add_dev(struct domain_device *parent, struct ex_phy *phy, 218 struct domain_device *child, int phy_id); 219 void sas_ata_strategy_handler(struct Scsi_Host *shost); 220 void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q); 221 void sas_ata_end_eh(struct ata_port *ap); 222 void sas_ata_wait_eh(struct domain_device *dev); 223 void sas_probe_sata(struct asd_sas_port *port); 224 void sas_suspend_sata(struct asd_sas_port *port); 225 void sas_resume_sata(struct asd_sas_port *port); 226 227 #else 228 229 static inline int sas_ata_init(struct domain_device *dev) 230 { 231 return 0; 232 } 233 234 static inline void sas_ata_task_abort(struct sas_task *task) 235 { 236 } 237 238 static inline void sas_ata_strategy_handler(struct Scsi_Host *shost) 239 { 240 } 241 242 static inline void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q) 243 { 244 } 245 246 static inline void sas_ata_end_eh(struct ata_port *ap) 247 { 248 } 249 250 static inline void sas_ata_wait_eh(struct domain_device *dev) 251 { 252 } 253 254 static inline void sas_probe_sata(struct asd_sas_port *port) 255 { 256 } 257 258 static inline void sas_suspend_sata(struct asd_sas_port *port) 259 { 260 } 261 262 static inline void sas_resume_sata(struct asd_sas_port *port) 263 { 264 } 265 266 static inline void sas_ata_disabled_notice(void) 267 { 268 pr_notice_once("ATA device seen but CONFIG_SCSI_SAS_ATA=N\n"); 269 } 270 271 static inline int sas_discover_sata(struct domain_device *dev) 272 { 273 sas_ata_disabled_notice(); 274 return -ENXIO; 275 } 276 277 static inline int sas_ata_add_dev(struct domain_device *parent, struct ex_phy *phy, 278 struct domain_device *child, int phy_id) 279 { 280 sas_ata_disabled_notice(); 281 return -ENODEV; 282 } 283 284 #endif 285 286 #endif /* _SAS_INTERNAL_H_ */ 287