James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 1 | /* |
| 2 | * SAS host prototypes and structures 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 _LIBSAS_H_ |
| 27 | #define _LIBSAS_H_ |
| 28 | |
| 29 | |
| 30 | #include <linux/timer.h> |
| 31 | #include <linux/pci.h> |
| 32 | #include <scsi/sas.h> |
Darrick J. Wong | fa1c1e8 | 2006-08-10 19:19:47 -0700 | [diff] [blame] | 33 | #include <linux/libata.h> |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 34 | #include <linux/list.h> |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 35 | #include <scsi/scsi_device.h> |
| 36 | #include <scsi/scsi_cmnd.h> |
| 37 | #include <scsi/scsi_transport_sas.h> |
Adrian Bunk | 87ae9af | 2007-10-30 10:35:04 +0100 | [diff] [blame] | 38 | #include <linux/scatterlist.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 39 | #include <linux/slab.h> |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 40 | |
| 41 | struct block_device; |
| 42 | |
| 43 | enum sas_class { |
| 44 | SAS, |
| 45 | EXPANDER |
| 46 | }; |
| 47 | |
| 48 | enum sas_phy_role { |
| 49 | PHY_ROLE_NONE = 0, |
| 50 | PHY_ROLE_TARGET = 0x40, |
| 51 | PHY_ROLE_INITIATOR = 0x80, |
| 52 | }; |
| 53 | |
| 54 | enum sas_phy_type { |
| 55 | PHY_TYPE_PHYSICAL, |
| 56 | PHY_TYPE_VIRTUAL |
| 57 | }; |
| 58 | |
| 59 | /* The events are mnemonically described in sas_dump.c |
| 60 | * so when updating/adding events here, please also |
| 61 | * update the other file too. |
| 62 | */ |
| 63 | enum ha_event { |
| 64 | HAE_RESET = 0U, |
| 65 | HA_NUM_EVENTS = 1, |
| 66 | }; |
| 67 | |
| 68 | enum port_event { |
| 69 | PORTE_BYTES_DMAED = 0U, |
| 70 | PORTE_BROADCAST_RCVD = 1, |
| 71 | PORTE_LINK_RESET_ERR = 2, |
| 72 | PORTE_TIMER_EVENT = 3, |
| 73 | PORTE_HARD_RESET = 4, |
| 74 | PORT_NUM_EVENTS = 5, |
| 75 | }; |
| 76 | |
| 77 | enum phy_event { |
| 78 | PHYE_LOSS_OF_SIGNAL = 0U, |
| 79 | PHYE_OOB_DONE = 1, |
| 80 | PHYE_OOB_ERROR = 2, |
| 81 | PHYE_SPINUP_HOLD = 3, /* hot plug SATA, no COMWAKE sent */ |
| 82 | PHY_NUM_EVENTS = 4, |
| 83 | }; |
| 84 | |
| 85 | enum discover_event { |
| 86 | DISCE_DISCOVER_DOMAIN = 0U, |
| 87 | DISCE_REVALIDATE_DOMAIN = 1, |
| 88 | DISCE_PORT_GONE = 2, |
Dan Williams | 87c8331 | 2011-11-17 17:59:51 -0800 | [diff] [blame] | 89 | DISCE_PROBE = 3, |
| 90 | DISCE_DESTRUCT = 4, |
| 91 | DISC_NUM_EVENTS = 5, |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 92 | }; |
| 93 | |
| 94 | /* ---------- Expander Devices ---------- */ |
| 95 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 96 | #define to_dom_device(_obj) container_of(_obj, struct domain_device, dev_obj) |
| 97 | #define to_dev_attr(_attr) container_of(_attr, struct domain_dev_attribute,\ |
| 98 | attr) |
| 99 | |
| 100 | enum routing_attribute { |
| 101 | DIRECT_ROUTING, |
| 102 | SUBTRACTIVE_ROUTING, |
| 103 | TABLE_ROUTING, |
| 104 | }; |
| 105 | |
| 106 | enum ex_phy_state { |
| 107 | PHY_EMPTY, |
| 108 | PHY_VACANT, |
| 109 | PHY_NOT_PRESENT, |
| 110 | PHY_DEVICE_DISCOVERED |
| 111 | }; |
| 112 | |
| 113 | struct ex_phy { |
| 114 | int phy_id; |
| 115 | |
| 116 | enum ex_phy_state phy_state; |
| 117 | |
| 118 | enum sas_dev_type attached_dev_type; |
James Bottomley | 88edf74 | 2006-09-06 17:36:13 -0500 | [diff] [blame] | 119 | enum sas_linkrate linkrate; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 120 | |
| 121 | u8 attached_sata_host:1; |
| 122 | u8 attached_sata_dev:1; |
| 123 | u8 attached_sata_ps:1; |
| 124 | |
Darrick J. Wong | 5929faf | 2007-11-05 11:51:17 -0800 | [diff] [blame] | 125 | enum sas_protocol attached_tproto; |
| 126 | enum sas_protocol attached_iproto; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 127 | |
| 128 | u8 attached_sas_addr[SAS_ADDR_SIZE]; |
| 129 | u8 attached_phy_id; |
| 130 | |
| 131 | u8 phy_change_count; |
| 132 | enum routing_attribute routing_attr; |
| 133 | u8 virtual:1; |
| 134 | |
| 135 | int last_da_index; |
| 136 | |
| 137 | struct sas_phy *phy; |
| 138 | struct sas_port *port; |
| 139 | }; |
| 140 | |
| 141 | struct expander_device { |
| 142 | struct list_head children; |
| 143 | |
| 144 | u16 ex_change_count; |
| 145 | u16 max_route_indexes; |
| 146 | u8 num_phys; |
Luben Tuikov | ffaac8f | 2011-09-22 09:41:36 -0700 | [diff] [blame] | 147 | |
| 148 | u8 t2t_supp:1; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 149 | u8 configuring:1; |
| 150 | u8 conf_route_table:1; |
Luben Tuikov | ffaac8f | 2011-09-22 09:41:36 -0700 | [diff] [blame] | 151 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 152 | u8 enclosure_logical_id[8]; |
| 153 | |
| 154 | struct ex_phy *ex_phy; |
| 155 | struct sas_port *parent_port; |
| 156 | }; |
| 157 | |
| 158 | /* ---------- SATA device ---------- */ |
| 159 | enum ata_command_set { |
| 160 | ATA_COMMAND_SET = 0, |
| 161 | ATAPI_COMMAND_SET = 1, |
| 162 | }; |
| 163 | |
| 164 | struct sata_device { |
| 165 | enum ata_command_set command_set; |
| 166 | struct smp_resp rps_resp; /* report_phy_sata_resp */ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 167 | u8 port_no; /* port number, if this is a PM (Port) */ |
| 168 | struct list_head children; /* PM Ports if this is a PM */ |
Darrick J. Wong | fa1c1e8 | 2006-08-10 19:19:47 -0700 | [diff] [blame] | 169 | |
| 170 | struct ata_port *ap; |
| 171 | struct ata_host ata_host; |
| 172 | struct ata_taskfile tf; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 173 | }; |
| 174 | |
Dan Williams | e139942 | 2012-01-07 08:52:39 +0000 | [diff] [blame] | 175 | enum { |
| 176 | SAS_DEV_GONE, |
Dan Williams | 87c8331 | 2011-11-17 17:59:51 -0800 | [diff] [blame] | 177 | SAS_DEV_DESTROY, |
Dan Williams | e139942 | 2012-01-07 08:52:39 +0000 | [diff] [blame] | 178 | }; |
| 179 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 180 | struct domain_device { |
| 181 | enum sas_dev_type dev_type; |
| 182 | |
James Bottomley | 88edf74 | 2006-09-06 17:36:13 -0500 | [diff] [blame] | 183 | enum sas_linkrate linkrate; |
| 184 | enum sas_linkrate min_linkrate; |
| 185 | enum sas_linkrate max_linkrate; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 186 | |
| 187 | int pathways; |
| 188 | |
| 189 | struct domain_device *parent; |
| 190 | struct list_head siblings; /* devices on the same level */ |
| 191 | struct asd_sas_port *port; /* shortcut to root of the tree */ |
| 192 | |
| 193 | struct list_head dev_list_node; |
Dan Williams | 87c8331 | 2011-11-17 17:59:51 -0800 | [diff] [blame] | 194 | struct list_head disco_list_node; /* awaiting probe or destruct */ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 195 | |
Darrick J. Wong | 5929faf | 2007-11-05 11:51:17 -0800 | [diff] [blame] | 196 | enum sas_protocol iproto; |
| 197 | enum sas_protocol tproto; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 198 | |
| 199 | struct sas_rphy *rphy; |
| 200 | |
| 201 | u8 sas_addr[SAS_ADDR_SIZE]; |
| 202 | u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE]; |
| 203 | |
| 204 | u8 frame_rcvd[32]; |
| 205 | |
| 206 | union { |
| 207 | struct expander_device ex_dev; |
| 208 | struct sata_device sata_dev; /* STP & directly attached */ |
| 209 | }; |
| 210 | |
| 211 | void *lldd_dev; |
Dan Williams | e139942 | 2012-01-07 08:52:39 +0000 | [diff] [blame] | 212 | unsigned long state; |
Dan Williams | 735f7d2 | 2011-11-17 17:59:47 -0800 | [diff] [blame] | 213 | struct kref kref; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 214 | }; |
| 215 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 216 | struct sas_discovery_event { |
| 217 | struct work_struct work; |
| 218 | struct asd_sas_port *port; |
| 219 | }; |
| 220 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 221 | struct sas_discovery { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 222 | struct sas_discovery_event disc_work[DISC_NUM_EVENTS]; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 223 | unsigned long pending; |
| 224 | u8 fanout_sas_addr[8]; |
| 225 | u8 eeds_a[8]; |
| 226 | u8 eeds_b[8]; |
| 227 | int max_level; |
| 228 | }; |
| 229 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 230 | /* The port struct is Class:RW, driver:RO */ |
| 231 | struct asd_sas_port { |
| 232 | /* private: */ |
| 233 | struct completion port_gone_completion; |
| 234 | |
| 235 | struct sas_discovery disc; |
| 236 | struct domain_device *port_dev; |
| 237 | spinlock_t dev_list_lock; |
| 238 | struct list_head dev_list; |
Dan Williams | 87c8331 | 2011-11-17 17:59:51 -0800 | [diff] [blame] | 239 | struct list_head disco_list; |
| 240 | struct list_head destroy_list; |
James Bottomley | 88edf74 | 2006-09-06 17:36:13 -0500 | [diff] [blame] | 241 | enum sas_linkrate linkrate; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 242 | |
| 243 | struct sas_phy *phy; |
| 244 | struct work_struct work; |
| 245 | |
| 246 | /* public: */ |
| 247 | int id; |
| 248 | |
| 249 | enum sas_class class; |
| 250 | u8 sas_addr[SAS_ADDR_SIZE]; |
| 251 | u8 attached_sas_addr[SAS_ADDR_SIZE]; |
Darrick J. Wong | 5929faf | 2007-11-05 11:51:17 -0800 | [diff] [blame] | 252 | enum sas_protocol iproto; |
| 253 | enum sas_protocol tproto; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 254 | |
| 255 | enum sas_oob_mode oob_mode; |
| 256 | |
| 257 | spinlock_t phy_list_lock; |
| 258 | struct list_head phy_list; |
| 259 | int num_phys; |
| 260 | u32 phy_mask; |
| 261 | |
| 262 | struct sas_ha_struct *ha; |
| 263 | |
| 264 | struct sas_port *port; |
| 265 | |
| 266 | void *lldd_port; /* not touched by the sas class code */ |
| 267 | }; |
| 268 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 269 | struct asd_sas_event { |
| 270 | struct work_struct work; |
| 271 | struct asd_sas_phy *phy; |
| 272 | }; |
| 273 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 274 | /* The phy pretty much is controlled by the LLDD. |
| 275 | * The class only reads those fields. |
| 276 | */ |
| 277 | struct asd_sas_phy { |
| 278 | /* private: */ |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 279 | struct asd_sas_event port_events[PORT_NUM_EVENTS]; |
| 280 | struct asd_sas_event phy_events[PHY_NUM_EVENTS]; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 281 | |
| 282 | unsigned long port_events_pending; |
| 283 | unsigned long phy_events_pending; |
| 284 | |
| 285 | int error; |
| 286 | |
| 287 | struct sas_phy *phy; |
| 288 | |
| 289 | /* public: */ |
| 290 | /* The following are class:RO, driver:R/W */ |
| 291 | int enabled; /* must be set */ |
| 292 | |
| 293 | int id; /* must be set */ |
| 294 | enum sas_class class; |
Darrick J. Wong | 5929faf | 2007-11-05 11:51:17 -0800 | [diff] [blame] | 295 | enum sas_protocol iproto; |
| 296 | enum sas_protocol tproto; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 297 | |
| 298 | enum sas_phy_type type; |
| 299 | enum sas_phy_role role; |
| 300 | enum sas_oob_mode oob_mode; |
James Bottomley | 88edf74 | 2006-09-06 17:36:13 -0500 | [diff] [blame] | 301 | enum sas_linkrate linkrate; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 302 | |
| 303 | u8 *sas_addr; /* must be set */ |
| 304 | u8 attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */ |
| 305 | |
| 306 | spinlock_t frame_rcvd_lock; |
| 307 | u8 *frame_rcvd; /* must be set */ |
| 308 | int frame_rcvd_size; |
| 309 | |
| 310 | spinlock_t sas_prim_lock; |
| 311 | u32 sas_prim; |
| 312 | |
| 313 | struct list_head port_phy_el; /* driver:RO */ |
| 314 | struct asd_sas_port *port; /* Class:RW, driver: RO */ |
| 315 | |
| 316 | struct sas_ha_struct *ha; /* may be set; the class sets it anyway */ |
| 317 | |
| 318 | void *lldd_phy; /* not touched by the sas_class_code */ |
| 319 | }; |
| 320 | |
| 321 | struct scsi_core { |
| 322 | struct Scsi_Host *shost; |
| 323 | |
| 324 | spinlock_t task_queue_lock; |
| 325 | struct list_head task_queue; |
| 326 | int task_queue_size; |
| 327 | |
Christoph Hellwig | d7a54e3 | 2007-04-26 09:38:01 -0400 | [diff] [blame] | 328 | struct task_struct *queue_thread; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 329 | }; |
| 330 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 331 | struct sas_ha_event { |
| 332 | struct work_struct work; |
| 333 | struct sas_ha_struct *ha; |
| 334 | }; |
| 335 | |
Darrick J. Wong | 6b0efb8 | 2007-01-11 14:15:43 -0800 | [diff] [blame] | 336 | enum sas_ha_state { |
| 337 | SAS_HA_REGISTERED, |
Dan Williams | b1124cd | 2011-12-19 16:42:34 -0800 | [diff] [blame] | 338 | SAS_HA_DRAINING, |
Dan Williams | 87c8331 | 2011-11-17 17:59:51 -0800 | [diff] [blame] | 339 | SAS_HA_ATA_EH_ACTIVE, |
Darrick J. Wong | 6b0efb8 | 2007-01-11 14:15:43 -0800 | [diff] [blame] | 340 | }; |
| 341 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 342 | struct sas_ha_struct { |
| 343 | /* private: */ |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 344 | struct sas_ha_event ha_events[HA_NUM_EVENTS]; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 345 | unsigned long pending; |
| 346 | |
Dan Williams | b1124cd | 2011-12-19 16:42:34 -0800 | [diff] [blame] | 347 | struct list_head defer_q; /* work queued while draining */ |
| 348 | struct mutex drain_mutex; |
Dan Williams | f8daa6e | 2011-12-19 17:02:25 -0800 | [diff] [blame] | 349 | unsigned long state; |
Darrick J. Wong | 6b0efb8 | 2007-01-11 14:15:43 -0800 | [diff] [blame] | 350 | spinlock_t state_lock; |
| 351 | |
Dan Williams | 87c8331 | 2011-11-17 17:59:51 -0800 | [diff] [blame] | 352 | struct mutex disco_mutex; |
| 353 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 354 | struct scsi_core core; |
| 355 | |
| 356 | /* public: */ |
| 357 | char *sas_ha_name; |
Jeff Garzik | 1d1bbee | 2007-07-26 09:28:37 -0400 | [diff] [blame] | 358 | struct device *dev; /* should be set */ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 359 | struct module *lldd_module; /* should be set */ |
| 360 | |
| 361 | u8 *sas_addr; /* must be set */ |
| 362 | u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE]; |
| 363 | |
| 364 | spinlock_t phy_port_lock; |
| 365 | struct asd_sas_phy **sas_phy; /* array of valid pointers, must be set */ |
| 366 | struct asd_sas_port **sas_port; /* array of valid pointers, must be set */ |
| 367 | int num_phys; /* must be set, gt 0, static */ |
| 368 | |
| 369 | /* The class calls this to send a task for execution. */ |
| 370 | int lldd_max_execute_num; |
| 371 | int lldd_queue_size; |
Dan Williams | 00f0254 | 2010-10-01 13:55:52 -0700 | [diff] [blame] | 372 | int strict_wide_ports; /* both sas_addr and attached_sas_addr must match |
| 373 | * their siblings when forming wide ports */ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 374 | |
| 375 | /* LLDD calls these to notify the class of an event. */ |
| 376 | void (*notify_ha_event)(struct sas_ha_struct *, enum ha_event); |
| 377 | void (*notify_port_event)(struct asd_sas_phy *, enum port_event); |
| 378 | void (*notify_phy_event)(struct asd_sas_phy *, enum phy_event); |
| 379 | |
| 380 | void *lldd_ha; /* not touched by sas class code */ |
Darrick J. Wong | f456393 | 2006-10-30 15:18:39 -0800 | [diff] [blame] | 381 | |
| 382 | struct list_head eh_done_q; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 383 | }; |
| 384 | |
| 385 | #define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata) |
| 386 | |
| 387 | static inline struct domain_device * |
| 388 | starget_to_domain_dev(struct scsi_target *starget) { |
| 389 | return starget->hostdata; |
| 390 | } |
| 391 | |
| 392 | static inline struct domain_device * |
| 393 | sdev_to_domain_dev(struct scsi_device *sdev) { |
| 394 | return starget_to_domain_dev(sdev->sdev_target); |
| 395 | } |
| 396 | |
Dan Williams | b50102d | 2011-09-30 18:52:19 -0700 | [diff] [blame] | 397 | static inline struct ata_device *sas_to_ata_dev(struct domain_device *dev) |
| 398 | { |
| 399 | return &dev->sata_dev.ap->link.device[0]; |
| 400 | } |
| 401 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 402 | static inline struct domain_device * |
| 403 | cmd_to_domain_dev(struct scsi_cmnd *cmd) |
| 404 | { |
| 405 | return sdev_to_domain_dev(cmd->device); |
| 406 | } |
| 407 | |
| 408 | void sas_hash_addr(u8 *hashed, const u8 *sas_addr); |
| 409 | |
| 410 | /* Before calling a notify event, LLDD should use this function |
| 411 | * when the link is severed (possibly from its tasklet). |
| 412 | * The idea is that the Class only reads those, while the LLDD, |
| 413 | * can R/W these (thus avoiding a race). |
| 414 | */ |
| 415 | static inline void sas_phy_disconnected(struct asd_sas_phy *phy) |
| 416 | { |
| 417 | phy->oob_mode = OOB_NOT_CONNECTED; |
James Bottomley | 88edf74 | 2006-09-06 17:36:13 -0500 | [diff] [blame] | 418 | phy->linkrate = SAS_LINK_RATE_UNKNOWN; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 419 | } |
| 420 | |
Dan Williams | 8ec6552 | 2011-09-01 21:18:20 -0700 | [diff] [blame] | 421 | static inline unsigned int to_sas_gpio_od(int device, int bit) |
| 422 | { |
| 423 | return 3 * device + bit; |
| 424 | } |
| 425 | |
Dan Williams | d962480 | 2011-09-23 16:43:45 -0700 | [diff] [blame] | 426 | #ifdef CONFIG_SCSI_SAS_HOST_SMP |
Dan Williams | 8ec6552 | 2011-09-01 21:18:20 -0700 | [diff] [blame] | 427 | int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count); |
Dan Williams | d962480 | 2011-09-23 16:43:45 -0700 | [diff] [blame] | 428 | #else |
| 429 | static inline int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count) |
| 430 | { |
| 431 | return -1; |
| 432 | } |
| 433 | #endif |
Dan Williams | 8ec6552 | 2011-09-01 21:18:20 -0700 | [diff] [blame] | 434 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 435 | /* ---------- Tasks ---------- */ |
| 436 | /* |
| 437 | service_response | SAS_TASK_COMPLETE | SAS_TASK_UNDELIVERED | |
| 438 | exec_status | | | |
| 439 | ---------------------+---------------------+-----------------------+ |
| 440 | SAM_... | X | | |
| 441 | DEV_NO_RESPONSE | X | X | |
| 442 | INTERRUPTED | X | | |
| 443 | QUEUE_FULL | | X | |
| 444 | DEVICE_UNKNOWN | | X | |
| 445 | SG_ERR | | X | |
| 446 | ---------------------+---------------------+-----------------------+ |
| 447 | */ |
| 448 | |
| 449 | enum service_response { |
| 450 | SAS_TASK_COMPLETE, |
| 451 | SAS_TASK_UNDELIVERED = -1, |
| 452 | }; |
| 453 | |
| 454 | enum exec_status { |
James Bottomley | df64d3c | 2010-07-27 15:51:13 -0500 | [diff] [blame] | 455 | /* The SAM_STAT_.. codes fit in the lower 6 bits */ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 456 | |
| 457 | SAS_DEV_NO_RESPONSE = 0x80, |
| 458 | SAS_DATA_UNDERRUN, |
| 459 | SAS_DATA_OVERRUN, |
| 460 | SAS_INTERRUPTED, |
| 461 | SAS_QUEUE_FULL, |
| 462 | SAS_DEVICE_UNKNOWN, |
| 463 | SAS_SG_ERR, |
| 464 | SAS_OPEN_REJECT, |
| 465 | SAS_OPEN_TO, |
| 466 | SAS_PROTO_RESPONSE, |
| 467 | SAS_PHY_DOWN, |
| 468 | SAS_NAK_R_ERR, |
| 469 | SAS_PENDING, |
| 470 | SAS_ABORTED_TASK, |
| 471 | }; |
| 472 | |
| 473 | /* When a task finishes with a response, the LLDD examines the |
| 474 | * response: |
| 475 | * - For an ATA task task_status_struct::stat is set to |
| 476 | * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the |
| 477 | * contents of struct ata_task_resp. |
| 478 | * - For SSP tasks, if no data is present or status/TMF response |
| 479 | * is valid, task_status_struct::stat is set. If data is present |
| 480 | * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets |
| 481 | * task_status_struct::buf_valid_size, and task_status_struct::stat is |
| 482 | * set to SAM_CHECK_COND. |
| 483 | * |
| 484 | * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp |
| 485 | * for ATA task. |
| 486 | * |
| 487 | * "frame_len" is the total frame length, which could be more or less |
| 488 | * than actually copied. |
| 489 | * |
| 490 | * Tasks ending with response, always set the residual field. |
| 491 | */ |
| 492 | struct ata_task_resp { |
| 493 | u16 frame_len; |
| 494 | u8 ending_fis[24]; /* dev to host or data-in */ |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 495 | }; |
| 496 | |
| 497 | #define SAS_STATUS_BUF_SIZE 96 |
| 498 | |
| 499 | struct task_status_struct { |
| 500 | enum service_response resp; |
| 501 | enum exec_status stat; |
| 502 | int buf_valid_size; |
| 503 | |
| 504 | u8 buf[SAS_STATUS_BUF_SIZE]; |
| 505 | |
| 506 | u32 residual; |
| 507 | enum sas_open_rej_reason open_rej_reason; |
| 508 | }; |
| 509 | |
| 510 | /* ATA and ATAPI task queuable to a SAS LLDD. |
| 511 | */ |
| 512 | struct sas_ata_task { |
| 513 | struct host_to_dev_fis fis; |
| 514 | u8 atapi_packet[16]; /* 0 if not ATAPI task */ |
| 515 | |
| 516 | u8 retry_count; /* hardware retry, should be > 0 */ |
| 517 | |
| 518 | u8 dma_xfer:1; /* PIO:0 or DMA:1 */ |
| 519 | u8 use_ncq:1; |
| 520 | u8 set_affil_pol:1; |
| 521 | u8 stp_affil_pol:1; |
| 522 | |
| 523 | u8 device_control_reg_update:1; |
| 524 | }; |
| 525 | |
| 526 | struct sas_smp_task { |
| 527 | struct scatterlist smp_req; |
| 528 | struct scatterlist smp_resp; |
| 529 | }; |
| 530 | |
| 531 | enum task_attribute { |
| 532 | TASK_ATTR_SIMPLE = 0, |
| 533 | TASK_ATTR_HOQ = 1, |
| 534 | TASK_ATTR_ORDERED= 2, |
| 535 | TASK_ATTR_ACA = 4, |
| 536 | }; |
| 537 | |
| 538 | struct sas_ssp_task { |
| 539 | u8 retry_count; /* hardware retry, should be > 0 */ |
| 540 | |
| 541 | u8 LUN[8]; |
| 542 | u8 enable_first_burst:1; |
| 543 | enum task_attribute task_attr; |
| 544 | u8 task_prio; |
| 545 | u8 cdb[16]; |
| 546 | }; |
| 547 | |
| 548 | struct sas_task { |
| 549 | struct domain_device *dev; |
| 550 | struct list_head list; |
| 551 | |
| 552 | spinlock_t task_state_lock; |
| 553 | unsigned task_state_flags; |
| 554 | |
Darrick J. Wong | 5929faf | 2007-11-05 11:51:17 -0800 | [diff] [blame] | 555 | enum sas_protocol task_proto; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 556 | |
| 557 | /* Used by the discovery code. */ |
| 558 | struct timer_list timer; |
| 559 | struct completion completion; |
| 560 | |
| 561 | union { |
| 562 | struct sas_ata_task ata_task; |
| 563 | struct sas_smp_task smp_task; |
| 564 | struct sas_ssp_task ssp_task; |
| 565 | }; |
| 566 | |
| 567 | struct scatterlist *scatter; |
| 568 | int num_scatter; |
| 569 | u32 total_xfer_len; |
| 570 | u8 data_dir:2; /* Use PCI_DMA_... */ |
| 571 | |
| 572 | struct task_status_struct task_status; |
| 573 | void (*task_done)(struct sas_task *); |
| 574 | |
| 575 | void *lldd_task; /* for use by LLDDs */ |
| 576 | void *uldd_task; |
Darrick J. Wong | 79a5eb6 | 2006-10-30 15:18:50 -0800 | [diff] [blame] | 577 | |
| 578 | struct work_struct abort_work; |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 579 | }; |
| 580 | |
Darrick J. Wong | f456393 | 2006-10-30 15:18:39 -0800 | [diff] [blame] | 581 | #define SAS_TASK_STATE_PENDING 1 |
| 582 | #define SAS_TASK_STATE_DONE 2 |
| 583 | #define SAS_TASK_STATE_ABORTED 4 |
Darrick J. Wong | 3ebf692 | 2007-01-11 14:15:17 -0800 | [diff] [blame] | 584 | #define SAS_TASK_NEED_DEV_RESET 8 |
Darrick J. Wong | b218a0d | 2007-01-11 14:14:55 -0800 | [diff] [blame] | 585 | #define SAS_TASK_AT_INITIATOR 16 |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 586 | |
Dan Williams | 4fcf812 | 2011-07-29 17:26:39 -0700 | [diff] [blame] | 587 | extern struct sas_task *sas_alloc_task(gfp_t flags); |
| 588 | extern void sas_free_task(struct sas_task *task); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 589 | |
| 590 | struct sas_domain_function_template { |
| 591 | /* The class calls these to notify the LLDD of an event. */ |
| 592 | void (*lldd_port_formed)(struct asd_sas_phy *); |
| 593 | void (*lldd_port_deformed)(struct asd_sas_phy *); |
| 594 | |
| 595 | /* The class calls these when a device is found or gone. */ |
| 596 | int (*lldd_dev_found)(struct domain_device *); |
| 597 | void (*lldd_dev_gone)(struct domain_device *); |
| 598 | |
| 599 | int (*lldd_execute_task)(struct sas_task *, int num, |
Al Viro | 3cc2754 | 2006-09-25 02:55:40 +0100 | [diff] [blame] | 600 | gfp_t gfp_flags); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 601 | |
| 602 | /* Task Management Functions. Must be called from process context. */ |
| 603 | int (*lldd_abort_task)(struct sas_task *); |
| 604 | int (*lldd_abort_task_set)(struct domain_device *, u8 *lun); |
| 605 | int (*lldd_clear_aca)(struct domain_device *, u8 *lun); |
| 606 | int (*lldd_clear_task_set)(struct domain_device *, u8 *lun); |
| 607 | int (*lldd_I_T_nexus_reset)(struct domain_device *); |
Dave Jiang | 1ca1e43 | 2011-05-24 13:18:04 -0700 | [diff] [blame] | 608 | int (*lldd_ata_soft_reset)(struct domain_device *); |
Dan Williams | b91bb29 | 2011-11-17 17:59:52 -0800 | [diff] [blame^] | 609 | void (*lldd_ata_set_dmamode)(struct domain_device *); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 610 | int (*lldd_lu_reset)(struct domain_device *, u8 *lun); |
| 611 | int (*lldd_query_task)(struct sas_task *); |
| 612 | |
| 613 | /* Port and Adapter management */ |
| 614 | int (*lldd_clear_nexus_port)(struct asd_sas_port *); |
| 615 | int (*lldd_clear_nexus_ha)(struct sas_ha_struct *); |
| 616 | |
| 617 | /* Phy management */ |
James Bottomley | a01e70e | 2006-09-06 19:28:07 -0500 | [diff] [blame] | 618 | int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *); |
Dan Williams | 8ec6552 | 2011-09-01 21:18:20 -0700 | [diff] [blame] | 619 | |
| 620 | /* GPIO support */ |
| 621 | int (*lldd_write_gpio)(struct sas_ha_struct *, u8 reg_type, |
| 622 | u8 reg_index, u8 reg_count, u8 *write_data); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 623 | }; |
| 624 | |
| 625 | extern int sas_register_ha(struct sas_ha_struct *); |
| 626 | extern int sas_unregister_ha(struct sas_ha_struct *); |
| 627 | |
Darrick J. Wong | acbf167 | 2007-01-11 14:14:57 -0800 | [diff] [blame] | 628 | int sas_set_phy_speed(struct sas_phy *phy, |
| 629 | struct sas_phy_linkrates *rates); |
| 630 | int sas_phy_enable(struct sas_phy *phy, int enabled); |
Darrick J. Wong | dea2221 | 2006-11-07 17:28:55 -0800 | [diff] [blame] | 631 | int sas_phy_reset(struct sas_phy *phy, int hard_reset); |
Darrick J. Wong | 338ec57 | 2006-10-18 14:43:37 -0700 | [diff] [blame] | 632 | int sas_queue_up(struct sas_task *task); |
Jeff Garzik | f281233 | 2010-11-16 02:10:29 -0500 | [diff] [blame] | 633 | extern int sas_queuecommand(struct Scsi_Host * ,struct scsi_cmnd *); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 634 | extern int sas_target_alloc(struct scsi_target *); |
| 635 | extern int sas_slave_alloc(struct scsi_device *); |
| 636 | extern int sas_slave_configure(struct scsi_device *); |
Mike Christie | e881a17 | 2009-10-15 17:46:39 -0700 | [diff] [blame] | 637 | extern int sas_change_queue_depth(struct scsi_device *, int new_depth, |
| 638 | int reason); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 639 | extern int sas_change_queue_type(struct scsi_device *, int qt); |
| 640 | extern int sas_bios_param(struct scsi_device *, |
| 641 | struct block_device *, |
| 642 | sector_t capacity, int *hsc); |
| 643 | extern struct scsi_transport_template * |
| 644 | sas_domain_attach_transport(struct sas_domain_function_template *); |
| 645 | extern void sas_domain_release_transport(struct scsi_transport_template *); |
| 646 | |
| 647 | int sas_discover_root_expander(struct domain_device *); |
| 648 | |
| 649 | void sas_init_ex_attr(void); |
| 650 | |
| 651 | int sas_ex_revalidate_domain(struct domain_device *); |
| 652 | |
| 653 | void sas_unregister_domain_devices(struct asd_sas_port *port); |
| 654 | void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *); |
| 655 | int sas_discover_event(struct asd_sas_port *, enum discover_event ev); |
| 656 | |
| 657 | int sas_discover_sata(struct domain_device *); |
| 658 | int sas_discover_end_dev(struct domain_device *); |
| 659 | |
Dan Williams | 1a34c06 | 2011-09-21 22:05:34 -0700 | [diff] [blame] | 660 | void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *); |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 661 | |
| 662 | void sas_init_dev(struct domain_device *); |
| 663 | |
Darrick J. Wong | 396819f | 2007-01-11 14:15:20 -0800 | [diff] [blame] | 664 | void sas_task_abort(struct sas_task *); |
| 665 | int __sas_task_abort(struct sas_task *); |
Darrick J. Wong | ad68923 | 2007-01-26 14:08:52 -0800 | [diff] [blame] | 666 | int sas_eh_device_reset_handler(struct scsi_cmnd *cmd); |
Darrick J. Wong | a9344e6 | 2007-01-29 23:48:19 -0800 | [diff] [blame] | 667 | int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd); |
Darrick J. Wong | 79a5eb6 | 2006-10-30 15:18:50 -0800 | [diff] [blame] | 668 | |
Darrick J. Wong | fa1c1e8 | 2006-08-10 19:19:47 -0700 | [diff] [blame] | 669 | extern void sas_target_destroy(struct scsi_target *); |
| 670 | extern int sas_slave_alloc(struct scsi_device *); |
| 671 | extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg); |
Dan Williams | b1124cd | 2011-12-19 16:42:34 -0800 | [diff] [blame] | 672 | extern int sas_drain_work(struct sas_ha_struct *ha); |
Darrick J. Wong | fa1c1e8 | 2006-08-10 19:19:47 -0700 | [diff] [blame] | 673 | |
FUJITA Tomonori | ba1fc17 | 2007-07-09 12:52:08 +0900 | [diff] [blame] | 674 | extern int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy, |
| 675 | struct request *req); |
James Bottomley | 366ca51 | 2008-01-18 10:47:01 -0600 | [diff] [blame] | 676 | |
| 677 | extern void sas_ssp_task_response(struct device *dev, struct sas_task *task, |
| 678 | struct ssp_response_iu *iu); |
James Bottomley | 5319578 | 2008-02-23 23:35:44 -0600 | [diff] [blame] | 679 | struct sas_phy *sas_find_local_phy(struct domain_device *dev); |
James Bottomley | 366ca51 | 2008-01-18 10:47:01 -0600 | [diff] [blame] | 680 | |
Darrick J. Wong | 45e6cdf | 2008-02-19 10:49:40 -0800 | [diff] [blame] | 681 | int sas_request_addr(struct Scsi_Host *shost, u8 *addr); |
| 682 | |
James Bottomley | 2908d77 | 2006-08-29 09:22:51 -0500 | [diff] [blame] | 683 | #endif /* _SASLIB_H_ */ |