drivers/scsi/libsas/sas_internal.h

   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
  18 #ifdef pr_fmt
  19 #undef pr_fmt
  20 #endif
  21
  22 #define SAS_FMT "sas: "
  23
  24 #define pr_fmt(fmt) SAS_FMT fmt
  25
  26 #define TO_SAS_TASK(_scsi_cmd)  ((void *)(_scsi_cmd)->host_scribble)
  27 #define ASSIGN_SAS_TASK(_sc, _t) do { (_sc)->host_scribble = (void *) _t; } while (0)
  28
  29 struct sas_phy_data {
  30         /* let reset be performed in sas_queue_work() context */
  31         struct sas_phy *phy;
  32         struct mutex event_lock;
  33         int hard_reset;
  34         int reset_result;
  35         struct sas_work reset_work;
  36         int enable;
  37         int enable_result;
  38         struct sas_work enable_work;
  39 };
  40
  41 void sas_scsi_recover_host(struct Scsi_Host *shost);
  42
  43 int sas_show_class(enum sas_class class, char *buf);
  44 int sas_show_proto(enum sas_protocol proto, char *buf);
  45 int sas_show_linkrate(enum sas_linkrate linkrate, char *buf);
  46 int sas_show_oob_mode(enum sas_oob_mode oob_mode, char *buf);
  47
  48 int  sas_register_phys(struct sas_ha_struct *sas_ha);
  49 void sas_unregister_phys(struct sas_ha_struct *sas_ha);
  50
  51 struct asd_sas_event *sas_alloc_event(struct asd_sas_phy *phy);
  52 void sas_free_event(struct asd_sas_event *event);
  53
  54 int  sas_register_ports(struct sas_ha_struct *sas_ha);
  55 void sas_unregister_ports(struct sas_ha_struct *sas_ha);
  56
  57 int  sas_init_events(struct sas_ha_struct *sas_ha);
  58 void sas_disable_revalidation(struct sas_ha_struct *ha);
  59 void sas_enable_revalidation(struct sas_ha_struct *ha);
  60 void __sas_drain_work(struct sas_ha_struct *ha);
  61
  62 void sas_deform_port(struct asd_sas_phy *phy, int gone);
  63
  64 void sas_porte_bytes_dmaed(struct work_struct *work);
  65 void sas_porte_broadcast_rcvd(struct work_struct *work);
  66 void sas_porte_link_reset_err(struct work_struct *work);
  67 void sas_porte_timer_event(struct work_struct *work);
  68 void sas_porte_hard_reset(struct work_struct *work);
  69 int sas_queue_work(struct sas_ha_struct *ha, struct sas_work *sw);
  70
  71 int sas_notify_lldd_dev_found(struct domain_device *);
  72 void sas_notify_lldd_dev_gone(struct domain_device *);
  73
  74 void sas_smp_handler(struct bsg_job *job, struct Scsi_Host *shost,
  75                 struct sas_rphy *rphy);
  76 int sas_smp_phy_control(struct domain_device *dev, int phy_id,
  77                         enum phy_func phy_func, struct sas_phy_linkrates *);
  78 int sas_smp_get_phy_events(struct sas_phy *phy);
  79
  80 int sas_notify_phy_event(struct asd_sas_phy *phy, enum phy_event event);
  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_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 #ifdef CONFIG_SCSI_SAS_HOST_SMP
  97 extern void sas_smp_host_handler(struct bsg_job *job, struct Scsi_Host *shost);
  98 #else
  99 static inline void sas_smp_host_handler(struct bsg_job *job,
 100                 struct Scsi_Host *shost)
 101 {
 102         shost_printk(KERN_ERR, shost,
 103                 "Cannot send SMP to a sas host (not enabled in CONFIG)\n");
 104         bsg_job_done(job, -EINVAL, 0);
 105 }
 106 #endif
 107
 108 static inline void sas_fail_probe(struct domain_device *dev, const char *func, int err)
 109 {
 110         pr_warn("%s: for %s device %016llx returned %d\n",
 111                 func, dev->parent ? "exp-attached" :
 112                 "direct-attached",
 113                 SAS_ADDR(dev->sas_addr), err);
 114         sas_unregister_dev(dev->port, dev);
 115 }
 116
 117 static inline void sas_fill_in_rphy(struct domain_device *dev,
 118                                     struct sas_rphy *rphy)
 119 {
 120         rphy->identify.sas_address = SAS_ADDR(dev->sas_addr);
 121         rphy->identify.initiator_port_protocols = dev->iproto;
 122         rphy->identify.target_port_protocols = dev->tproto;
 123         switch (dev->dev_type) {
 124         case SAS_SATA_DEV:
 125                 /* FIXME: need sata device type */
 126         case SAS_END_DEVICE:
 127         case SAS_SATA_PENDING:
 128                 rphy->identify.device_type = SAS_END_DEVICE;
 129                 break;
 130         case SAS_EDGE_EXPANDER_DEVICE:
 131                 rphy->identify.device_type = SAS_EDGE_EXPANDER_DEVICE;
 132                 break;
 133         case SAS_FANOUT_EXPANDER_DEVICE:
 134                 rphy->identify.device_type = SAS_FANOUT_EXPANDER_DEVICE;
 135                 break;
 136         default:
 137                 rphy->identify.device_type = SAS_PHY_UNUSED;
 138                 break;
 139         }
 140 }
 141
 142 static inline void sas_phy_set_target(struct asd_sas_phy *p, struct domain_device *dev)
 143 {
 144         struct sas_phy *phy = p->phy;
 145
 146         if (dev) {
 147                 if (dev_is_sata(dev))
 148                         phy->identify.device_type = SAS_END_DEVICE;
 149                 else
 150                         phy->identify.device_type = dev->dev_type;
 151                 phy->identify.target_port_protocols = dev->tproto;
 152         } else {
 153                 phy->identify.device_type = SAS_PHY_UNUSED;
 154                 phy->identify.target_port_protocols = 0;
 155         }
 156 }
 157
 158 static inline void sas_add_parent_port(struct domain_device *dev, int phy_id)
 159 {
 160         struct expander_device *ex = &dev->ex_dev;
 161         struct ex_phy *ex_phy = &ex->ex_phy[phy_id];
 162
 163         if (!ex->parent_port) {
 164                 ex->parent_port = sas_port_alloc(&dev->rphy->dev, phy_id);
 165                 /* FIXME: error handling */
 166                 BUG_ON(!ex->parent_port);
 167                 BUG_ON(sas_port_add(ex->parent_port));
 168                 sas_port_mark_backlink(ex->parent_port);
 169         }
 170         sas_port_add_phy(ex->parent_port, ex_phy->phy);
 171 }
 172
 173 static inline struct domain_device *sas_alloc_device(void)
 174 {
 175         struct domain_device *dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 176
 177         if (dev) {
 178                 INIT_LIST_HEAD(&dev->siblings);
 179                 INIT_LIST_HEAD(&dev->dev_list_node);
 180                 INIT_LIST_HEAD(&dev->disco_list_node);
 181                 kref_init(&dev->kref);
 182                 spin_lock_init(&dev->done_lock);
 183         }
 184         return dev;
 185 }
 186
 187 static inline void sas_put_device(struct domain_device *dev)
 188 {
 189         kref_put(&dev->kref, sas_free_device);
 190 }
 191
 192 #endif /* _SAS_INTERNAL_H_ */