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 semaphore queue_thread_sema;
318 int queue_thread_kill;
321 struct sas_ha_event {
322 struct work_struct work;
323 struct sas_ha_struct *ha;
326 struct sas_ha_struct {
328 spinlock_t event_lock;
329 struct sas_ha_event ha_events[HA_NUM_EVENTS];
330 unsigned long pending;
332 struct scsi_core core;
336 struct pci_dev *pcidev; /* should be set */
337 struct module *lldd_module; /* should be set */
339 u8 *sas_addr; /* must be set */
340 u8 hashed_sas_addr[HASHED_SAS_ADDR_SIZE];
342 spinlock_t phy_port_lock;
343 struct asd_sas_phy **sas_phy; /* array of valid pointers, must be set */
344 struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
345 int num_phys; /* must be set, gt 0, static */
347 /* The class calls this to send a task for execution. */
348 int lldd_max_execute_num;
351 /* LLDD calls these to notify the class of an event. */
352 void (*notify_ha_event)(struct sas_ha_struct *, enum ha_event);
353 void (*notify_port_event)(struct asd_sas_phy *, enum port_event);
354 void (*notify_phy_event)(struct asd_sas_phy *, enum phy_event);
356 void *lldd_ha; /* not touched by sas class code */
358 struct list_head eh_done_q;
361 #define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata)
363 static inline struct domain_device *
364 starget_to_domain_dev(struct scsi_target *starget) {
365 return starget->hostdata;
368 static inline struct domain_device *
369 sdev_to_domain_dev(struct scsi_device *sdev) {
370 return starget_to_domain_dev(sdev->sdev_target);
373 static inline struct domain_device *
374 cmd_to_domain_dev(struct scsi_cmnd *cmd)
376 return sdev_to_domain_dev(cmd->device);
379 void sas_hash_addr(u8 *hashed, const u8 *sas_addr);
381 /* Before calling a notify event, LLDD should use this function
382 * when the link is severed (possibly from its tasklet).
383 * The idea is that the Class only reads those, while the LLDD,
384 * can R/W these (thus avoiding a race).
386 static inline void sas_phy_disconnected(struct asd_sas_phy *phy)
388 phy->oob_mode = OOB_NOT_CONNECTED;
389 phy->linkrate = SAS_LINK_RATE_UNKNOWN;
392 /* ---------- Tasks ---------- */
394 service_response | SAS_TASK_COMPLETE | SAS_TASK_UNDELIVERED |
396 ---------------------+---------------------+-----------------------+
398 DEV_NO_RESPONSE | X | X |
401 DEVICE_UNKNOWN | | X |
403 ---------------------+---------------------+-----------------------+
406 enum service_response {
408 SAS_TASK_UNDELIVERED = -1,
416 SAM_INTERMEDIATE = 0x10,
417 SAM_IM_COND_MET = 0x12,
418 SAM_RESV_CONFLICT= 0x14,
419 SAM_TASK_SET_FULL= 0x28,
420 SAM_ACA_ACTIVE = 0x30,
421 SAM_TASK_ABORTED = 0x40,
423 SAS_DEV_NO_RESPONSE = 0x80,
439 /* When a task finishes with a response, the LLDD examines the
441 * - For an ATA task task_status_struct::stat is set to
442 * SAS_PROTO_RESPONSE, and the task_status_struct::buf is set to the
443 * contents of struct ata_task_resp.
444 * - For SSP tasks, if no data is present or status/TMF response
445 * is valid, task_status_struct::stat is set. If data is present
446 * (SENSE data), the LLDD copies up to SAS_STATUS_BUF_SIZE, sets
447 * task_status_struct::buf_valid_size, and task_status_struct::stat is
448 * set to SAM_CHECK_COND.
450 * "buf" has format SCSI Sense for SSP task, or struct ata_task_resp
453 * "frame_len" is the total frame length, which could be more or less
454 * than actually copied.
456 * Tasks ending with response, always set the residual field.
458 struct ata_task_resp {
460 u8 ending_fis[24]; /* dev to host or data-in */
467 #define SAS_STATUS_BUF_SIZE 96
469 struct task_status_struct {
470 enum service_response resp;
471 enum exec_status stat;
474 u8 buf[SAS_STATUS_BUF_SIZE];
477 enum sas_open_rej_reason open_rej_reason;
480 /* ATA and ATAPI task queuable to a SAS LLDD.
482 struct sas_ata_task {
483 struct host_to_dev_fis fis;
484 u8 atapi_packet[16]; /* 0 if not ATAPI task */
486 u8 retry_count; /* hardware retry, should be > 0 */
488 u8 dma_xfer:1; /* PIO:0 or DMA:1 */
493 u8 device_control_reg_update:1;
496 struct sas_smp_task {
497 struct scatterlist smp_req;
498 struct scatterlist smp_resp;
501 enum task_attribute {
502 TASK_ATTR_SIMPLE = 0,
504 TASK_ATTR_ORDERED= 2,
508 struct sas_ssp_task {
509 u8 retry_count; /* hardware retry, should be > 0 */
512 u8 enable_first_burst:1;
513 enum task_attribute task_attr;
519 struct domain_device *dev;
520 struct list_head list;
522 spinlock_t task_state_lock;
523 unsigned task_state_flags;
525 enum sas_proto task_proto;
527 /* Used by the discovery code. */
528 struct timer_list timer;
529 struct completion completion;
532 struct sas_ata_task ata_task;
533 struct sas_smp_task smp_task;
534 struct sas_ssp_task ssp_task;
537 struct scatterlist *scatter;
540 u8 data_dir:2; /* Use PCI_DMA_... */
542 struct task_status_struct task_status;
543 void (*task_done)(struct sas_task *);
545 void *lldd_task; /* for use by LLDDs */
548 struct work_struct abort_work;
553 #define SAS_TASK_STATE_PENDING 1
554 #define SAS_TASK_STATE_DONE 2
555 #define SAS_TASK_STATE_ABORTED 4
556 #define SAS_TASK_NEED_DEV_RESET 8
557 #define SAS_TASK_AT_INITIATOR 16
559 static inline struct sas_task *sas_alloc_task(gfp_t flags)
561 extern struct kmem_cache *sas_task_cache;
562 struct sas_task *task = kmem_cache_alloc(sas_task_cache, flags);
565 memset(task, 0, sizeof(*task));
566 INIT_LIST_HEAD(&task->list);
567 spin_lock_init(&task->task_state_lock);
568 task->task_state_flags = SAS_TASK_STATE_PENDING;
569 init_timer(&task->timer);
570 init_completion(&task->completion);
576 static inline void sas_free_task(struct sas_task *task)
579 extern struct kmem_cache *sas_task_cache;
580 BUG_ON(!list_empty(&task->list));
581 kmem_cache_free(sas_task_cache, task);
585 struct sas_domain_function_template {
586 /* The class calls these to notify the LLDD of an event. */
587 void (*lldd_port_formed)(struct asd_sas_phy *);
588 void (*lldd_port_deformed)(struct asd_sas_phy *);
590 /* The class calls these when a device is found or gone. */
591 int (*lldd_dev_found)(struct domain_device *);
592 void (*lldd_dev_gone)(struct domain_device *);
594 int (*lldd_execute_task)(struct sas_task *, int num,
597 /* Task Management Functions. Must be called from process context. */
598 int (*lldd_abort_task)(struct sas_task *);
599 int (*lldd_abort_task_set)(struct domain_device *, u8 *lun);
600 int (*lldd_clear_aca)(struct domain_device *, u8 *lun);
601 int (*lldd_clear_task_set)(struct domain_device *, u8 *lun);
602 int (*lldd_I_T_nexus_reset)(struct domain_device *);
603 int (*lldd_lu_reset)(struct domain_device *, u8 *lun);
604 int (*lldd_query_task)(struct sas_task *);
606 /* Port and Adapter management */
607 int (*lldd_clear_nexus_port)(struct asd_sas_port *);
608 int (*lldd_clear_nexus_ha)(struct sas_ha_struct *);
611 int (*lldd_control_phy)(struct asd_sas_phy *, enum phy_func, void *);
614 extern int sas_register_ha(struct sas_ha_struct *);
615 extern int sas_unregister_ha(struct sas_ha_struct *);
617 int sas_set_phy_speed(struct sas_phy *phy,
618 struct sas_phy_linkrates *rates);
619 int sas_phy_enable(struct sas_phy *phy, int enabled);
620 int sas_phy_reset(struct sas_phy *phy, int hard_reset);
621 extern int sas_queuecommand(struct scsi_cmnd *,
622 void (*scsi_done)(struct scsi_cmnd *));
623 extern int sas_target_alloc(struct scsi_target *);
624 extern int sas_slave_alloc(struct scsi_device *);
625 extern int sas_slave_configure(struct scsi_device *);
626 extern void sas_slave_destroy(struct scsi_device *);
627 extern int sas_change_queue_depth(struct scsi_device *, int new_depth);
628 extern int sas_change_queue_type(struct scsi_device *, int qt);
629 extern int sas_bios_param(struct scsi_device *,
630 struct block_device *,
631 sector_t capacity, int *hsc);
632 extern struct scsi_transport_template *
633 sas_domain_attach_transport(struct sas_domain_function_template *);
634 extern void sas_domain_release_transport(struct scsi_transport_template *);
636 int sas_discover_root_expander(struct domain_device *);
638 void sas_init_ex_attr(void);
640 int sas_ex_revalidate_domain(struct domain_device *);
642 void sas_unregister_domain_devices(struct asd_sas_port *port);
643 void sas_init_disc(struct sas_discovery *disc, struct asd_sas_port *);
644 int sas_discover_event(struct asd_sas_port *, enum discover_event ev);
646 int sas_discover_sata(struct domain_device *);
647 int sas_discover_end_dev(struct domain_device *);
649 void sas_unregister_dev(struct domain_device *);
651 void sas_init_dev(struct domain_device *);
653 void sas_task_abort(struct work_struct *);
655 #endif /* _SASLIB_H_ */