2 * SAS host prototypes and structures header file
4 * Copyright (C) 2005 Adaptec, Inc. All rights reserved.
5 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
7 * This file is licensed under GPLv2.
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.
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.
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
30 #include <linux/timer.h>
31 #include <linux/pci.h>
33 #include <linux/list.h>
34 #include <asm/semaphore.h>
35 #include <scsi/scsi_device.h>
36 #include <scsi/scsi_cmnd.h>
37 #include <scsi/scsi_transport_sas.h>
38 #include <asm/scatterlist.h>
49 PHY_ROLE_TARGET = 0x40,
50 PHY_ROLE_INITIATOR = 0x80,
58 /* The events are mnemonically described in sas_dump.c
59 * so when updating/adding events here, please also
60 * update the other file too.
68 PORTE_BYTES_DMAED = 0U,
69 PORTE_BROADCAST_RCVD = 1,
70 PORTE_LINK_RESET_ERR = 2,
71 PORTE_TIMER_EVENT = 3,
77 PHYE_LOSS_OF_SIGNAL = 0U,
80 PHYE_SPINUP_HOLD = 3, /* hot plug SATA, no COMWAKE sent */
85 DISCE_DISCOVER_DOMAIN = 0U,
86 DISCE_REVALIDATE_DOMAIN = 1,
91 /* ---------- Expander Devices ---------- */
95 #define to_dom_device(_obj) container_of(_obj, struct domain_device, dev_obj)
96 #define to_dev_attr(_attr) container_of(_attr, struct domain_dev_attribute,\
99 enum routing_attribute {
109 PHY_DEVICE_DISCOVERED
115 enum ex_phy_state phy_state;
117 enum sas_dev_type attached_dev_type;
118 enum sas_linkrate linkrate;
120 u8 attached_sata_host:1;
121 u8 attached_sata_dev:1;
122 u8 attached_sata_ps:1;
124 enum sas_proto attached_tproto;
125 enum sas_proto attached_iproto;
127 u8 attached_sas_addr[SAS_ADDR_SIZE];
131 enum routing_attribute routing_attr;
137 struct sas_port *port;
140 struct expander_device {
141 struct list_head children;
144 u16 max_route_indexes;
147 u8 conf_route_table:1;
148 u8 enclosure_logical_id[8];
150 struct ex_phy *ex_phy;
151 struct sas_port *parent_port;
154 /* ---------- SATA device ---------- */
155 enum ata_command_set {
157 ATAPI_COMMAND_SET = 1,
161 enum ata_command_set command_set;
162 struct smp_resp rps_resp; /* report_phy_sata_resp */
163 __le16 *identify_device;
164 __le16 *identify_packet_device;
166 u8 port_no; /* port number, if this is a PM (Port) */
167 struct list_head children; /* PM Ports if this is a PM */
170 /* ---------- Domain device ---------- */
171 struct domain_device {
172 enum sas_dev_type dev_type;
174 enum sas_linkrate linkrate;
175 enum sas_linkrate min_linkrate;
176 enum sas_linkrate max_linkrate;
180 struct domain_device *parent;
181 struct list_head siblings; /* devices on the same level */
182 struct asd_sas_port *port; /* shortcut to root of the tree */
184 struct list_head dev_list_node;
186 enum sas_proto iproto;
187 enum sas_proto tproto;
189 struct sas_rphy *rphy;
191 u8 sas_addr[SAS_ADDR_SIZE];
192 u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
197 struct expander_device ex_dev;
198 struct sata_device sata_dev; /* STP & directly attached */
204 struct sas_discovery_event {
205 struct work_struct work;
206 struct asd_sas_port *port;
209 struct sas_discovery {
210 spinlock_t disc_event_lock;
211 struct sas_discovery_event disc_work[DISC_NUM_EVENTS];
212 unsigned long pending;
213 u8 fanout_sas_addr[8];
220 /* The port struct is Class:RW, driver:RO */
221 struct asd_sas_port {
223 struct completion port_gone_completion;
225 struct sas_discovery disc;
226 struct domain_device *port_dev;
227 spinlock_t dev_list_lock;
228 struct list_head dev_list;
229 enum sas_linkrate linkrate;
232 struct work_struct work;
237 enum sas_class class;
238 u8 sas_addr[SAS_ADDR_SIZE];
239 u8 attached_sas_addr[SAS_ADDR_SIZE];
240 enum sas_proto iproto;
241 enum sas_proto tproto;
243 enum sas_oob_mode oob_mode;
245 spinlock_t phy_list_lock;
246 struct list_head phy_list;
250 struct sas_ha_struct *ha;
252 struct sas_port *port;
254 void *lldd_port; /* not touched by the sas class code */
257 struct asd_sas_event {
258 struct work_struct work;
259 struct asd_sas_phy *phy;
262 /* The phy pretty much is controlled by the LLDD.
263 * The class only reads those fields.
267 /* protected by ha->event_lock */
268 struct asd_sas_event port_events[PORT_NUM_EVENTS];
269 struct asd_sas_event phy_events[PHY_NUM_EVENTS];
271 unsigned long port_events_pending;
272 unsigned long phy_events_pending;
279 /* The following are class:RO, driver:R/W */
280 int enabled; /* must be set */
282 int id; /* must be set */
283 enum sas_class class;
284 enum sas_proto iproto;
285 enum sas_proto tproto;
287 enum sas_phy_type type;
288 enum sas_phy_role role;
289 enum sas_oob_mode oob_mode;
290 enum sas_linkrate linkrate;
292 u8 *sas_addr; /* must be set */
293 u8 attached_sas_addr[SAS_ADDR_SIZE]; /* class:RO, driver: R/W */
295 spinlock_t frame_rcvd_lock;
296 u8 *frame_rcvd; /* must be set */
299 spinlock_t sas_prim_lock;
302 struct list_head port_phy_el; /* driver:RO */
303 struct asd_sas_port *port; /* Class:RW, driver: RO */
305 struct sas_ha_struct *ha; /* may be set; the class sets it anyway */
307 void *lldd_phy; /* not touched by the sas_class_code */
311 struct Scsi_Host *shost;
313 spinlock_t task_queue_lock;
314 struct list_head task_queue;
317 struct task_struct *queue_thread;
320 struct sas_ha_event {
321 struct work_struct work;
322 struct sas_ha_struct *ha;
330 struct sas_ha_struct {
332 spinlock_t event_lock;
333 struct sas_ha_event ha_events[HA_NUM_EVENTS];
334 unsigned long pending;
336 enum sas_ha_state state;
337 spinlock_t state_lock;
339 struct scsi_core core;
343 struct pci_dev *pcidev; /* should be set */
344 struct module *lldd_module; /* should be set */
346 u8 *sas_addr; /* must be set */
347 u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
349 spinlock_t phy_port_lock;
350 struct asd_sas_phy **sas_phy; /* array of valid pointers, must be set */
351 struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
352 int num_phys; /* must be set, gt 0, static */
354 /* The class calls this to send a task for execution. */
355 int lldd_max_execute_num;
358 /* LLDD calls these to notify the class of an event. */
359 void (*notify_ha_event)(struct sas_ha_struct *, enum ha_event);
360 void (*notify_port_event)(struct asd_sas_phy *, enum port_event);
361 void (*notify_phy_event)(struct asd_sas_phy *, enum phy_event);
363 void *lldd_ha; /* not touched by sas class code */
365 struct list_head eh_done_q;
368 #define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
370 static inline struct domain_device *
371 starget_to_domain_dev(struct scsi_target *starget) {
372 return starget->hostdata;
375 static inline struct domain_device *
376 sdev_to_domain_dev(struct scsi_device *sdev) {
377 return starget_to_domain_dev(sdev->sdev_target);
380 static inline struct domain_device *
381 cmd_to_domain_dev(struct scsi_cmnd *cmd)
383 return sdev_to_domain_dev(cmd->device);
386 void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
388 /* Before calling a notify event, LLDD should use this function
389 * when the link is severed (possibly from its tasklet).
390 * The idea is that the Class only reads those, while the LLDD,
391 * can R/W these (thus avoiding a race).
393 static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
395 phy->oob_mode = OOB_NOT_CONNECTED;
396 phy->linkrate = SAS_LINK_RATE_UNKNOWN;
399 /* ---------- Tasks ---------- */
401 service_response | SAS_TASK_COMPLETE | SAS_TASK_UNDELIVERED |
403 ---------------------+---------------------+-----------------------+
405 DEV_NO_RESPONSE | X | X |
408 DEVICE_UNKNOWN | | X |
410 ---------------------+---------------------+-----------------------+
413 enum service_response {
415 SAS_TASK_UNDELIVERED = -1,
423 SAM_INTERMEDIATE = 0x10,
424 SAM_IM_COND_MET = 0x12,
425 SAM_RESV_CONFLICT= 0x14,
426 SAM_TASK_SET_FULL= 0x28,
427 SAM_ACA_ACTIVE = 0x30,
428 SAM_TASK_ABORTED = 0x40,
430 SAS_DEV_NO_RESPONSE = 0x80,
446 /* When a task finishes with a response, the LLDD examines the
448 * - For an ATA task task_status_struct::stat is set to
449 * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
450 * contents of struct ata_task_resp.
451 * - For SSP tasks, if no data is present or status/TMF response
452 * is valid, task_status_struct::stat is set. If data is present
453 * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
454 * task_status_struct::buf_valid_size, and task_status_struct::stat is
455 * set to SAM_CHECK_COND.
457 * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
460 * "frame_len" is the total frame length, which could be more or less
461 * than actually copied.
463 * Tasks ending with response, always set the residual field.
465 struct ata_task_resp {
467 u8 ending_fis[24]; /* dev to host or data-in */
474 #define SAS_STATUS_BUF_SIZE 96
476 struct task_status_struct {
477 enum service_response resp;
478 enum exec_status stat;
481 u8 buf[SAS_STATUS_BUF_SIZE];
484 enum sas_open_rej_reason open_rej_reason;
487 /* ATA and ATAPI task queuable to a SAS LLDD.
489 struct sas_ata_task {
490 struct host_to_dev_fis fis;
491 u8 atapi_packet[16]; /* 0 if not ATAPI task */
493 u8 retry_count; /* hardware retry, should be > 0 */
495 u8 dma_xfer:1; /* PIO:0 or DMA:1 */
500 u8 device_control_reg_update:1;
503 struct sas_smp_task {
504 struct scatterlist smp_req;
505 struct scatterlist smp_resp;
508 enum task_attribute {
509 TASK_ATTR_SIMPLE = 0,
511 TASK_ATTR_ORDERED= 2,
515 struct sas_ssp_task {
516 u8 retry_count; /* hardware retry, should be > 0 */
519 u8 enable_first_burst:1;
520 enum task_attribute task_attr;
526 struct domain_device *dev;
527 struct list_head list;
529 spinlock_t task_state_lock;
530 unsigned task_state_flags;
532 enum sas_proto task_proto;
534 /* Used by the discovery code. */
535 struct timer_list timer;
536 struct completion completion;
539 struct sas_ata_task ata_task;
540 struct sas_smp_task smp_task;
541 struct sas_ssp_task ssp_task;
544 struct scatterlist *scatter;
547 u8 data_dir:2; /* Use PCI_DMA_... */
549 struct task_status_struct task_status;
550 void (*task_done)(struct sas_task *);
552 void *lldd_task; /* for use by LLDDs */
555 struct work_struct abort_work;
560 #define SAS_TASK_STATE_PENDING 1
561 #define SAS_TASK_STATE_DONE 2
562 #define SAS_TASK_STATE_ABORTED 4
563 #define SAS_TASK_NEED_DEV_RESET 8
564 #define SAS_TASK_AT_INITIATOR 16
566 static inline struct sas_task *sas_alloc_task(gfp_t flags)
568 extern struct kmem_cache *sas_task_cache;
569 struct sas_task *task = kmem_cache_zalloc(sas_task_cache, flags);
572 INIT_LIST_HEAD(&task->list);
573 spin_lock_init(&task->task_state_lock);
574 task->task_state_flags = SAS_TASK_STATE_PENDING;
575 init_timer(&task->timer);
576 init_completion(&task->completion);
582 static inline void sas_free_task(struct sas_task *task)
585 extern struct kmem_cache *sas_task_cache;
586 BUG_ON(!list_empty(&task->list));
587 kmem_cache_free(sas_task_cache, task);
591 struct sas_domain_function_template {
592 /* The class calls these to notify the LLDD of an event. */
593 void (*lldd_port_formed)(struct asd_sas_phy *);
594 void (*lldd_port_deformed)(struct asd_sas_phy *);
596 /* The class calls these when a device is found or gone. */
597 int (*lldd_dev_found)(struct domain_device *);
598 void (*lldd_dev_gone)(struct domain_device *);
600 int (*lldd_execute_task)(struct sas_task *, int num,
603 /* Task Management Functions. Must be called from process context. */
604 int (*lldd_abort_task)(struct sas_task *);
605 int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
606 int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
607 int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
608 int (*lldd_I_T_nexus_reset)(struct domain_device *);
609 int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
610 int (*lldd_query_task)(struct sas_task *);
612 /* Port and Adapter management */
613 int (*lldd_clear_nexus_port)(struct asd_sas_port *);
614 int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
617 int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
620 extern int sas_register_ha(struct sas_ha_struct *);
621 extern int sas_unregister_ha(struct sas_ha_struct *);
623 int sas_set_phy_speed(struct sas_phy *phy,
624 struct sas_phy_linkrates *rates);
625 int sas_phy_enable(struct sas_phy *phy, int enabled);
626 int sas_phy_reset(struct sas_phy *phy, int hard_reset);
627 extern int sas_queuecommand(struct scsi_cmnd *,
628 void (*scsi_done)(struct scsi_cmnd *));
629 extern int sas_target_alloc(struct scsi_target *);
630 extern int sas_slave_alloc(struct scsi_device *);
631 extern int sas_slave_configure(struct scsi_device *);
632 extern void sas_slave_destroy(struct scsi_device *);
633 extern int sas_change_queue_depth(struct scsi_device *, int new_depth);
634 extern int sas_change_queue_type(struct scsi_device *, int qt);
635 extern int sas_bios_param(struct scsi_device *,
636 struct block_device *,
637 sector_t capacity, int *hsc);
638 extern struct scsi_transport_template *
639 sas_domain_attach_transport(struct sas_domain_function_template *);
640 extern void sas_domain_release_transport(struct scsi_transport_template *);
642 int sas_discover_root_expander(struct domain_device *);
644 void sas_init_ex_attr(void);
646 int sas_ex_revalidate_domain(struct domain_device *);
648 void sas_unregister_domain_devices(struct asd_sas_port *port);
649 void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
650 int sas_discover_event(struct asd_sas_port *, enum discover_event ev);
652 int sas_discover_sata(struct domain_device *);
653 int sas_discover_end_dev(struct domain_device *);
655 void sas_unregister_dev(struct domain_device *);
657 void sas_init_dev(struct domain_device *);
659 void sas_task_abort(struct sas_task *);
660 int __sas_task_abort(struct sas_task *);
661 int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
662 int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd);
664 #endif /* _SASLIB_H_ */