drivers/scsi/libsas/sas_internal.h

   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
  34 #define sas_printk(fmt, ...) printk(KERN_NOTICE "sas: " fmt, ## __VA_ARGS__)
  35
  36 #define SAS_DPRINTK(fmt, ...) printk(KERN_DEBUG "sas: " fmt, ## __VA_ARGS__)
  37
  38 #define TO_SAS_TASK(_scsi_cmd)  ((void *)(_scsi_cmd)->host_scribble)
  39 #define ASSIGN_SAS_TASK(_sc, _t) do { (_sc)->host_scribble = (void *) _t; } while (0)
  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 int  sas_register_ports(struct sas_ha_struct *sas_ha);
  52 void sas_unregister_ports(struct sas_ha_struct *sas_ha);
  53
  54 enum blk_eh_timer_return sas_scsi_timed_out(struct scsi_cmnd *);
  55
  56 int  sas_init_queue(struct sas_ha_struct *sas_ha);
  57 int  sas_init_events(struct sas_ha_struct *sas_ha);
  58 void sas_shutdown_queue(struct sas_ha_struct *sas_ha);
  59
  60 void sas_deform_port(struct asd_sas_phy *phy, int gone);
  61
  62 void sas_porte_bytes_dmaed(struct work_struct *work);
  63 void sas_porte_broadcast_rcvd(struct work_struct *work);
  64 void sas_porte_link_reset_err(struct work_struct *work);
  65 void sas_porte_timer_event(struct work_struct *work);
  66 void sas_porte_hard_reset(struct work_struct *work);
  67
  68 int sas_notify_lldd_dev_found(struct domain_device *);
  69 void sas_notify_lldd_dev_gone(struct domain_device *);
  70
  71 int sas_smp_phy_control(struct domain_device *dev, int phy_id,
  72                         enum phy_func phy_func, struct sas_phy_linkrates *);
  73 int sas_smp_get_phy_events(struct sas_phy *phy);
  74
  75 struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy);
  76
  77 void sas_hae_reset(struct work_struct *work);
  78
  79 #ifdef CONFIG_SCSI_SAS_HOST_SMP
  80 extern int sas_smp_host_handler(struct Scsi_Host *shost, struct request *req,
  81                                 struct request *rsp);
  82 #else
  83 static inline int sas_smp_host_handler(struct Scsi_Host *shost,
  84                                        struct request *req,
  85                                        struct request *rsp)
  86 {
  87         shost_printk(KERN_ERR, shost,
  88                 "Cannot send SMP to a sas host (not enabled in CONFIG)\n");
  89         return -EINVAL;
  90 }
  91 #endif
  92
  93 static inline void sas_queue_event(int event, spinlock_t *lock,
  94                                    unsigned long *pending,
  95                                    struct work_struct *work,
  96                                    struct sas_ha_struct *sas_ha)
  97 {
  98         unsigned long flags;
  99
 100         spin_lock_irqsave(lock, flags);
 101         if (test_bit(event, pending)) {
 102                 spin_unlock_irqrestore(lock, flags);
 103                 return;
 104         }
 105         __set_bit(event, pending);
 106         spin_unlock_irqrestore(lock, flags);
 107
 108         spin_lock_irqsave(&sas_ha->state_lock, flags);
 109         if (sas_ha->state != SAS_HA_UNREGISTERED) {
 110                 scsi_queue_work(sas_ha->core.shost, work);
 111         }
 112         spin_unlock_irqrestore(&sas_ha->state_lock, flags);
 113 }
 114
 115 static inline void sas_begin_event(int event, spinlock_t *lock,
 116                                    unsigned long *pending)
 117 {
 118         unsigned long flags;
 119
 120         spin_lock_irqsave(lock, flags);
 121         __clear_bit(event, pending);
 122         spin_unlock_irqrestore(lock, flags);
 123 }
 124
 125 static inline void sas_fill_in_rphy(struct domain_device *dev,
 126                                     struct sas_rphy *rphy)
 127 {
 128         rphy->identify.sas_address = SAS_ADDR(dev->sas_addr);
 129         rphy->identify.initiator_port_protocols = dev->iproto;
 130         rphy->identify.target_port_protocols = dev->tproto;
 131         switch (dev->dev_type) {
 132         case SATA_DEV:
 133                 /* FIXME: need sata device type */
 134         case SAS_END_DEV:
 135                 rphy->identify.device_type = SAS_END_DEVICE;
 136                 break;
 137         case EDGE_DEV:
 138                 rphy->identify.device_type = SAS_EDGE_EXPANDER_DEVICE;
 139                 break;
 140         case FANOUT_DEV:
 141                 rphy->identify.device_type = SAS_FANOUT_EXPANDER_DEVICE;
 142                 break;
 143         default:
 144                 rphy->identify.device_type = SAS_PHY_UNUSED;
 145                 break;
 146         }
 147 }
 148
 149 static inline void sas_add_parent_port(struct domain_device *dev, int phy_id)
 150 {
 151         struct expander_device *ex = &dev->ex_dev;
 152         struct ex_phy *ex_phy = &ex->ex_phy[phy_id];
 153
 154         if (!ex->parent_port) {
 155                 ex->parent_port = sas_port_alloc(&dev->rphy->dev, phy_id);
 156                 /* FIXME: error handling */
 157                 BUG_ON(!ex->parent_port);
 158                 BUG_ON(sas_port_add(ex->parent_port));
 159                 sas_port_mark_backlink(ex->parent_port);
 160         }
 161         sas_port_add_phy(ex->parent_port, ex_phy->phy);
 162 }
 163
 164 #endif /* _SAS_INTERNAL_H_ */