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 #include <scsi/sas_ata.h> 34 35 #define sas_printk(fmt, ...) printk(KERN_NOTICE "sas: " fmt, ## __VA_ARGS__) 36 37 #define SAS_DPRINTK(fmt, ...) printk(KERN_DEBUG "sas: " fmt, ## __VA_ARGS__) 38 39 #define TO_SAS_TASK(_scsi_cmd) ((void *)(_scsi_cmd)->host_scribble) 40 #define ASSIGN_SAS_TASK(_sc, _t) do { (_sc)->host_scribble = (void *) _t; } while (0) 41 42 struct sas_phy_data { 43 /* let reset be performed in sas_queue_work() context */ 44 struct sas_phy *phy; 45 struct mutex event_lock; 46 int hard_reset; 47 int reset_result; 48 struct sas_work reset_work; 49 int enable; 50 int enable_result; 51 struct sas_work enable_work; 52 }; 53 54 void sas_scsi_recover_host(struct Scsi_Host *shost); 55 56 int sas_show_class(enum sas_class class, char *buf); 57 int sas_show_proto(enum sas_protocol proto, char *buf); 58 int sas_show_linkrate(enum sas_linkrate linkrate, char *buf); 59 int sas_show_oob_mode(enum sas_oob_mode oob_mode, char *buf); 60 61 int sas_register_phys(struct sas_ha_struct *sas_ha); 62 void sas_unregister_phys(struct sas_ha_struct *sas_ha); 63 64 int sas_register_ports(struct sas_ha_struct *sas_ha); 65 void sas_unregister_ports(struct sas_ha_struct *sas_ha); 66 67 enum blk_eh_timer_return sas_scsi_timed_out(struct scsi_cmnd *); 68 69 int sas_init_events(struct sas_ha_struct *sas_ha); 70 void sas_disable_revalidation(struct sas_ha_struct *ha); 71 void sas_enable_revalidation(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, int 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 void 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 int sas_smp_phy_control(struct domain_device *dev, int phy_id, 87 enum phy_func phy_func, struct sas_phy_linkrates *); 88 int sas_smp_get_phy_events(struct sas_phy *phy); 89 90 void sas_notify_phy_event(struct asd_sas_phy *phy, enum phy_event event); 91 void sas_device_set_phy(struct domain_device *dev, struct sas_port *port); 92 struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy); 93 struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id); 94 int sas_ex_phy_discover(struct domain_device *dev, int single); 95 int sas_get_report_phy_sata(struct domain_device *dev, int phy_id, 96 struct smp_resp *rps_resp); 97 int sas_try_ata_reset(struct asd_sas_phy *phy); 98 void sas_hae_reset(struct work_struct *work); 99 100 void sas_free_device(struct kref *kref); 101 102 #ifdef CONFIG_SCSI_SAS_HOST_SMP 103 extern int sas_smp_host_handler(struct Scsi_Host *shost, struct request *req, 104 struct request *rsp); 105 #else 106 static inline int sas_smp_host_handler(struct Scsi_Host *shost, 107 struct request *req, 108 struct request *rsp) 109 { 110 shost_printk(KERN_ERR, shost, 111 "Cannot send SMP to a sas host (not enabled in CONFIG)\n"); 112 return -EINVAL; 113 } 114 #endif 115 116 static inline void sas_fail_probe(struct domain_device *dev, const char *func, int err) 117 { 118 SAS_DPRINTK("%s: for %s device %16llx returned %d\n", 119 func, dev->parent ? "exp-attached" : 120 "direct-attached", 121 SAS_ADDR(dev->sas_addr), err); 122 sas_unregister_dev(dev->port, dev); 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 SAS_SATA_DEV: 133 /* FIXME: need sata device type */ 134 case SAS_END_DEVICE: 135 case SAS_SATA_PENDING: 136 rphy->identify.device_type = SAS_END_DEVICE; 137 break; 138 case SAS_EDGE_EXPANDER_DEVICE: 139 rphy->identify.device_type = SAS_EDGE_EXPANDER_DEVICE; 140 break; 141 case SAS_FANOUT_EXPANDER_DEVICE: 142 rphy->identify.device_type = SAS_FANOUT_EXPANDER_DEVICE; 143 break; 144 default: 145 rphy->identify.device_type = SAS_PHY_UNUSED; 146 break; 147 } 148 } 149 150 static inline void sas_phy_set_target(struct asd_sas_phy *p, struct domain_device *dev) 151 { 152 struct sas_phy *phy = p->phy; 153 154 if (dev) { 155 if (dev_is_sata(dev)) 156 phy->identify.device_type = SAS_END_DEVICE; 157 else 158 phy->identify.device_type = dev->dev_type; 159 phy->identify.target_port_protocols = dev->tproto; 160 } else { 161 phy->identify.device_type = SAS_PHY_UNUSED; 162 phy->identify.target_port_protocols = 0; 163 } 164 } 165 166 static inline void sas_add_parent_port(struct domain_device *dev, int phy_id) 167 { 168 struct expander_device *ex = &dev->ex_dev; 169 struct ex_phy *ex_phy = &ex->ex_phy[phy_id]; 170 171 if (!ex->parent_port) { 172 ex->parent_port = sas_port_alloc(&dev->rphy->dev, phy_id); 173 /* FIXME: error handling */ 174 BUG_ON(!ex->parent_port); 175 BUG_ON(sas_port_add(ex->parent_port)); 176 sas_port_mark_backlink(ex->parent_port); 177 } 178 sas_port_add_phy(ex->parent_port, ex_phy->phy); 179 } 180 181 static inline struct domain_device *sas_alloc_device(void) 182 { 183 struct domain_device *dev = kzalloc(sizeof(*dev), GFP_KERNEL); 184 185 if (dev) { 186 INIT_LIST_HEAD(&dev->siblings); 187 INIT_LIST_HEAD(&dev->dev_list_node); 188 INIT_LIST_HEAD(&dev->disco_list_node); 189 kref_init(&dev->kref); 190 spin_lock_init(&dev->done_lock); 191 } 192 return dev; 193 } 194 195 static inline void sas_put_device(struct domain_device *dev) 196 { 197 kref_put(&dev->kref, sas_free_device); 198 } 199 200 #endif /* _SAS_INTERNAL_H_ */ 201